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delay relay 0.5 Sec - AC 24 V to AC 24 V is a type of electrical relay that introduces a 0.5-second time delay in a circuit, specifically designed to operate with a 24-volt AC (Alternating Current) power supply. This means that when the control voltage (24V AC) is applied or removed, the relay's output contacts won't change their state immediately; instead, there will be a half-second pause before they do. Here's a breakdown of what each part of the description means:

Delay Relay (or Time Delay Relay/Timer Relay): This is a control device that, unlike a standard relay, incorporates a timing function. It's used to control an event based on a pre-selected time interval.
0.5 Sec: This specifies the duration of the time delay. In this case, it's a very short half-second delay. Time delays can range from milliseconds to hours or even days, depending on the relay.
AC 24 V (Input/Control Voltage): This indicates the type and voltage of the power supply required to energize the relay's coil or internal control circuitry. "AC" means Alternating Current, and "24 V" is the nominal voltage.
to AC 24 V (Output/Load Voltage): While not explicitly stated as "output," this implies that the relay is likely intended to switch a 24V AC load. This means the contacts within the relay are rated to handle 24V AC to control another part of the circuit or a device. It's important to note that the load voltage can sometimes be different from the control voltage, but in this specific phrasing, it suggests both are 24V AC.

How it Works A time delay relay operates using an internal timing circuit, which can be electronic (using components like capacitors, resistors, and microcontrollers) or electromechanical. When the input voltage (24V AC) is applied, the timing circuit is triggered. Once the preset delay (0.5 seconds) elapses, the relay's contacts will change their state (either closing normally open contacts or opening normally closed contacts), thereby activating or deactivating the connected load. Types of Delay Functions Delay relays come in various functions, and the "0.5 Sec - AC 24 V to AC 24 V" relay could be one of several types:

On-Delay (Normally-Open, Timed-Closed - NOTC): The most common type. When the control voltage is applied, the timing period begins. After 0.5 seconds, the output contacts close. The contacts remain closed as long as the control voltage is present.
Off-Delay (Normally-Open, Timed-Open - NOTO): When the control voltage is applied, the output contacts close immediately. When the control voltage is removed, the 0.5-second delay begins. After this delay, the contacts open.
One-Shot: Provides a single output pulse of a specified duration (in this case, 0.5 seconds) when triggered.
Repeat Cycle: Alternates between ON and OFF states for defined durations, creating a repeating cycle. This particular relay with a fixed 0.5-second delay is less likely to be a multi-function repeat cycle unless it's just one setting within a programmable unit.

To know the exact function, you'd need to consult the relay's datasheet or part number. Common Applications Delay relays are crucial in various control and automation systems where precise timing is essential. For a 0.5-second delay, typical applications might include:

Sequencing Operations: Ensuring one component starts or stops slightly after another in a controlled sequence.
Motor Control: Providing a brief delay before starting a motor (e.g., for pre-lubrication pumps to stabilize).
Safety Interlocks: Implementing a short delay to ensure certain conditions are met before an action can occur.
HVAC Systems: Timing the activation or deactivation of fans, compressors, or other components.
Conveyor Systems: Coordinating the starting or stopping of multiple conveyor belts to prevent material jams.
Lighting Control: For example, a short delay before turning on a light in a specific area

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Delay relay 0.5 Sec – AC 24 V to DC 12 V

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$62.15

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Delay relay 0.5 Sec - AC 24 V to DC 12 V

A "delay relay 0.5 Sec - AC 24 V to DC 24 V" is a time delay relay that is designed to:

Operate with a control voltage of 24 volts, which can be either Alternating Current (AC) or Direct Current (DC). This dual compatibility (AC/DC 24V) is a key feature, as many relays are specific to one type of current.
Introduce a delay of 0.5 seconds before its contacts change state. This delay can be an "on-delay" (contacts close/open after 0.5 seconds when power is applied) or an "off-delay" (contacts remain closed/open for 0.5 seconds after power is removed), or other timing functions depending on the specific relay's design.
Switch or control a separate circuit, which may be a 24V DC circuit. The "AC 24V to DC 24V" in the description refers to the relay's input power compatibility (it can be powered by either 24V AC or 24V DC) and its output capability (it's often used to control 24V DC loads). It is not a direct AC to DC converter for the load it's switching, but rather indicates its flexible control voltage. The relay itself doesn't convert the power; it merely switches it on or off after a delay. If the controlled circuit specifically requires DC, the relay's contacts would simply switch the 24V DC power to that circuit.

Essentially, it's a versatile timing device used in control systems. Purpose of Time Delay Relays Time delay relays are crucial in various applications where precise timing of electrical events is required. They serve to:

Prevent false triggering: A brief fluctuation in voltage or a momentary signal might cause immediate activation in a standard relay. A short delay (like 0.5 seconds) can prevent such nuisance activations.
Create timed sequences: In automated processes, certain steps may need to occur in a specific order with set delays in between. For example, a delay relay could ensure one motor starts before another or that a safety purge cycle completes before a furnace ignites.
Control motor starts/stops: They can be used for "soft starting" motors, gradually increasing voltage to reduce inrush current, or for ensuring a motor has fully stopped before another action begins.
HVAC systems: They prevent "short cycling" of compressors, which can damage the unit, by introducing a delay between successive starts.
Lighting control: Ensuring lights stay on for a set period after activation (e.g., in stairwells) or controlling emergency lighting.
Security systems: Providing a brief delay before an alarm triggers, allowing authorized personnel to disarm the system.

Types of Time Delay Relays While the "0.5 Sec" refers to the specific delay, time delay relays come with various functions:

On-delay (Delay on Make): The most common type. The contacts change state only after the set time delay has elapsed after the control voltage is applied.
Off-delay (Delay on Break): The contacts change state immediately when the control voltage is applied, but only return to their original state after the set time delay has elapsed after the control voltage is removed.
Interval: The contacts change state immediately when the control voltage is applied, and then return to their original state after the set time delay.
Repeat Cycle: The relay continuously cycles between on and off states with specific time delays as long as the control voltage is applied.

In the case of a "delay relay 0.5 Sec", it would likely be an on-delay or interval type, but the exact function would need to be confirmed from the specific model's datasheet. AC/DC 24V Compatibility The "AC 24 V to DC 24 V" part primarily indicates the coil voltage compatibility of the relay. Many modern time delay relays are designed to accept a wide range of input voltages, including both AC and DC, within a specified range (e.g., 24V AC/DC). This offers flexibility in wiring and application, as the relay can be integrated into systems powered by either AC or DC at that voltage level. It's important to distinguish that this relay itself is not a voltage converter (like a power supply that converts AC to DC). Instead, it's a switching device. If the circuit you are trying to control requires DC and your power source is AC, you would need a separate AC to DC power converter (like a power supply unit) to provide the 24V DC to your load, which the relay's contacts would then switch.

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Digital programmable ON/OFF relay

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$44.60

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Digital programmable ON/OFF relay

A digital programmable ON/OFF relay is an electronic switch that can be programmed to turn electrical devices on or off at specific times or intervals. It combines the fundamental switching functionality of a traditional relay with the advanced timing and control capabilities of a digital timer or microcontroller. This allows for automated control of various devices and systems without constant human intervention. How it Works At its core, a digital programmable ON/OFF relay operates similarly to a standard relay by using a small electrical current to control a larger electrical circuit. However, the "digital programmable" aspect introduces a sophisticated timing mechanism.

Digital Interface: Unlike mechanical or analog timer relays with physical dials, digital programmable relays feature an LED or LCD display and a keypad or buttons for programming. This allows users to set precise ON/OFF times, durations, and sequences.
Microcontroller-Based: Most digital programmable relays use a microcontroller to manage the timing and control logic. This internal "brain" keeps track of time and executes the programmed instructions.
Timing Functions: These relays offer a wide range of timing functions, including:
- On-delay: The relay turns on after a preset delay once activated.
- Off-delay: The relay turns off after a preset delay once deactivated.
- Interval timing: The relay stays on for a specific duration after activation.
- Cyclic operation: The relay repeatedly cycles ON and OFF at set intervals.
- Astronomic timing: Some advanced models can turn devices on/off based on sunrise and sunset times by calculating the solar position.
- Photocell integration: Others may include light sensors to activate based on ambient light levels.
Memory Retention: Many programmable relays can store settings in memory even after a power interruption, ensuring that the programmed schedule is not lost.

Key Features and Advantages

Programmable Timing: Offers precise control over when devices turn on and off.
Automation: Reduces the need for manual operation, leading to increased efficiency.
Energy Savings: Allows for optimization of energy usage by ensuring devices are only active when needed.
Flexibility and Versatility: Can be configured for a wide array of applications due to various timing modes.
Compact Design: Often more compact than systems using multiple hardwired timers and relays.
Ease of Use: User-friendly interfaces for setting up programs.
Reliability: Many are solid-state, meaning they have no moving parts, which increases durability and reduces noise compared to electromechanical relays.

Applications Digital programmable ON/OFF relays are highly versatile and found in numerous applications across various sectors:

Home Automation: Controlling lighting, appliances, or other devices based on a preset schedule (e.g., security lights, garden irrigation).
Industrial Automation: Managing machinery, conveyors, pumps, motors, and other equipment in factories or manufacturing facilities.
Building Management Systems: Automated control of HVAC systems (heating, ventilation, air conditioning), lighting (e.g., streetlights turning on at dusk), and security systems.
Commercial Applications: Used in vending machines, amusement equipment, and commercial appliances.
Agriculture: Controlling irrigation pumps or greenhouse lighting.
Security Systems: Activating alarms or security lights at specific times or in response to sensors.

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Diode 1N4007

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$1.85

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Diode 1N4007

The 1N4007 is a very common and versatile silicon rectifier diode. It's part of the 1N400x series of general-purpose diodes, with the "7" indicating its specific voltage rating. Key Characteristics

Rectifier Diode: Its primary function is to convert alternating current (AC) into pulsating direct current (DC) by allowing current to flow in only one direction.
High Reverse Voltage Rating: The 1N4007 can withstand a peak repetitive reverse voltage ( $V_{RRM}$ ) of 1000V. This makes it suitable for high-voltage applications.
Average Forward Current: It can handle an average forward current ( $I_{F}$ ) of 1 Ampere (1A).
Forward Voltage Drop: When conducting in the forward direction, it has a relatively low forward voltage drop ( $V_{F}$ ) of approximately 0.7V to 1.1V. This voltage drop represents the power lost within the diode.
Surge Current Capability: It can handle a non-repetitive peak surge current ( $I_{FSM}$ ) of up to 30A for short durations, which is useful for handling initial power-on surges.
Package Type: It typically comes in a DO-41 axial-lead package, which is a small, cylindrical plastic package with leads on both ends.
Operating Temperature Range: It operates reliably over a wide temperature range, typically from -55°C to +175°C.

How it Works Like all diodes, the 1N4007 is a PN-junction device. It consists of a P-type semiconductor and an N-type semiconductor joined together.

Forward Bias: When a positive voltage is applied to the anode (P-side) and a negative voltage to the cathode (N-side), the diode is forward-biased. If the applied voltage exceeds the forward voltage drop (around 0.7V for silicon diodes), the diode conducts, allowing current to flow from anode to cathode.
Reverse Bias: When a negative voltage is applied to the anode and a positive voltage to the cathode, the diode is reverse-biased. In this state, the diode acts like an open switch, blocking current flow. The 1N4007 is designed to withstand up to 1000V in this reverse-biased state before breaking down.

Common Applications The 1N4007's robust characteristics make it popular in a wide range of electronic circuits, including:

Rectifier Circuits:
- Half-wave and Full-wave Rectifiers: Essential for converting AC power from the mains (like in household appliances) to DC power for electronic devices.
- Bridge Rectifiers: Used to convert the entire AC waveform into pulsating DC, achieving more efficient rectification.
Power Supplies: Used for rectifying the AC input in power supply units to provide DC voltage to various components.
Voltage Protection:
- Reverse Polarity Protection: Prevents damage to circuits if the power supply is connected with incorrect polarity.
- Freewheeling Diodes (Flyback Diodes): Protect sensitive components from voltage spikes generated by inductive loads (like relays, motors, and solenoids) when their magnetic field collapses.
- Voltage Spike Suppression: Helps to suppress transient voltage spikes that can occur due to switching events or lightning, safeguarding delicate electronics.
Inverters and Converters: Used in various power conversion circuits.
Current Flow Regulation: Can be used in simple current limiting or flow control applications.

Due to its high reverse voltage rating, the 1N4007 is often a go-to choice when a general-purpose rectifier diode is needed, especially in circuits that might experience higher voltages.

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Diode 1N5408

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Diode 1N5408

The 1N5408 is a common general-purpose rectifier diode. It's designed to allow electric current to flow primarily in one direction, making it crucial for converting alternating current (AC) to direct current (DC). Think of it like a one-way valve for electricity. It belongs to the 1N540x series of power diodes, known for their ability to handle relatively high current and voltage. Here are its key characteristics and common uses: Key Features

High Reverse Voltage Rating: It can withstand a maximum repetitive reverse voltage ( $V_{RRM}$ ) of 1000V. This means it can block high voltages when current tries to flow in the "wrong" direction.
High Forward Current Capacity: It's rated for an average rectified forward current ( $I_{F (A V)}$ ) of 3 Amperes (A). This indicates it can handle a significant amount of current flowing through it in the correct direction.
High Surge Current Capability: The 1N5408 can handle non-repetitive peak forward surge currents ( $I_{FSM}$ ) of up to 200A for short durations, protecting circuits from sudden power spikes.
Low Forward Voltage Drop: When conducting, it has a relatively low forward voltage drop ( $V_{F}$ ) of approximately 1.0V to 1.2V at its rated current. A lower voltage drop means less power is lost as heat.
Standard Recovery: It's a "standard recovery" diode, meaning its switching speed is relatively slow compared to fast recovery diodes. This makes it suitable for power rectification at lower frequencies (like 50/60 Hz AC).
DO-201 Package: It typically comes in a DO-201 axial-leaded package, which is a through-hole component with leads extending from both ends, allowing for easy mounting on circuit boards.
Wide Operating Temperature Range: It can operate and be stored in a wide temperature range, typically from -65°C to +175°C.

Applications The robust nature of the 1N5408 makes it a staple in various electronic designs:

Power Supplies and Rectifiers: This is its primary application. It efficiently converts AC input voltage into pulsating DC, which can then be smoothed by capacitors to provide a stable DC output for electronic devices. This includes full-wave and half-wave rectifier circuits.
Battery Chargers: Used to convert AC wall power into DC for charging batteries.
Voltage Regulation Circuits: Helps in maintaining a stable output voltage by rectifying current.
Protection Circuits: Its ability to block reverse current makes it useful for reverse polarity protection, preventing damage to sensitive components if the power supply is connected incorrectly.
Freewheeling Diode: Used in inductive circuits (like those with relays or motors) to provide a path for stored energy to dissipate when the current is switched off, preventing voltage spikes that could damage other components.
Voltage Doubler Circuits: Can be used in circuits designed to effectively double the input voltage.

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Diode Bridge GBU808

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$11.80

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Diode Bridge GBU808

*8A *800V *Single Phase *Rectifier IC Chip

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Door closer -DCL061

Gate Hardware

$63.00

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Door closer -DCL061

The "Door closer -DCL061" appears to refer to a specific model of door closer, primarily offered by Royal Electronics Technology Center Co. Based on the information found, here's what we know about it:

Type: DCL061 is a mechanical door closer.
Capacity: Door closer -DCL061 has a capacity of 45 Kg, indicating it's suitable for doors up to that weight.
Dimensions: Door closer -DCL061 dimensions are 25 × 9 × 9 cm.
Purpose: Like all door closers, it's designed to automatically close a door in a controlled manner after it has been opened. This serves various purposes, including:
- Security: Ensuring doors are not left open inadvertently.
- Fire Safety: Crucial for fire doors to prevent the spread of fire and smoke.
- Energy Efficiency: Helping to maintain indoor temperatures by ensuring doors close properly.
- Accessibility and Safety: Preventing doors from slamming, reducing the risk of injury, and allowing controlled passage for individuals with limited mobility.

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Door closer -DCL062

Gate Hardware

$72.45

Door closer -DCL062 Capacity: 75 Kg A door closer -DCL062 is a mechanical device that automatically closes a door after

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Door Strike Lock

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$69.95

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Door Strike Lock

An electric strike is an electromechanical lock release device that replaces a standard door strike plate.

It allows a door to be opened remotely, typically via an access control system, without manually retracting the latch. When activated, the electric strike releases the latch, enabling the door to be opened.

Here's a more detailed explanation:

Functionality:

Replaces Standard Strike:

Electric strikes are installed in the door frame, taking the place of the standard strike plate.
Remote Release:

They are designed to work with various access control systems, such as keypads, card readers, or intercoms.
Activation:

When an authorized signal is received (e.g., a code is entered, a card is swiped), the electric strike releases the latch, allowing the door to be opened.
Fail-Safe or Fail-Secure:
Electric strikes can be configured in either a fail-safe or fail-secure mode.

Fail-safe: In this mode, the door unlocks when power is lost, making it suitable for safety applications where access is needed during power outages.

Fail-secure: In this mode, the door remains locked when power is lost, requiring power to unlock, making it suitable for high-security applications.

How it Works:

The electric strike contains a solenoid, which is an electromagnet.
When the solenoid is activated by an electrical signal, it moves a component (like an armature) that allows the latch to move freely.
This movement releases the door, allowing it to be opened.

Key Differences from Other Locks:

Electric vs. Magnetic Locks:

Unlike magnetic locks, which use powerful magnets to hold the door closed, electric strikes release the latch mechanism.
Remote Access:

Electric strikes offer remote access control, allowing doors to be unlocked without manual intervention.
Versatility:

They can be used with various locking mechanisms, including cylindrical, mortise, and rim exit devices.

Common Applications:

Access Control:

Electric strikes are a core component of access control systems in commercial and residential settings.
Security:

They provide a higher level of security compared to standard locks, especially when used with fail-secure configurations.
Safety:

In fail-safe configurations, they ensure safe egress during emergencies.
Specific Areas:

They are commonly found in reception areas, daycare centers, and other locations where controlled access is needed.

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Doorbell SDB111

Access Control

$25.00

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Doorbell SDB111

The "Doorbell SDB111" primarily refers to a wired doorbell system that operates on a 12-volt DC power supply. It's often associated with Royal Electronics Technology Center Co. and is commonly used for security access control in homes, offices, and other buildings.

Here's a breakdown of its typical characteristics about the doorbell SDB111:

Wired System: The "12V" in its name signifies that it's a wired doorbell, meaning it connects to a power source via electrical wires. This usually involves a transformer that converts household voltage to 12V DC.
Low Voltage: Like many doorbell systems, it operates on low voltage for safety.
Functionality: Its primary function is to produce a chime sound (like a "ding-dong") when the doorbell button is pressed. It's often chosen for its durability and continuous function without needing battery replacements.
Installation: These doorbells can be installed with screws or double-sided adhesive tape and typically come with wiring diagrams.
Security Integration: They are considered a good security measure as they are external and can be integrated with other security systems.
Access Control: The SDB111 is specifically mentioned in the context of access control systems, suggesting its use in managing entry to a property.

While the "SDB111" designation seems to be most commonly linked to this type of wired doorbell, it's worth noting that model numbers can sometimes be reused across different product categories by various manufacturers. However, in the context of doorbells, the SDB111 is consistently described as a 12V wired doorbell.