1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of the GB Reed Relay, model GB-RLY-1A5V-SIL. Please read this manual thoroughly before using the product to ensure safe and efficient operation.
2. Product Overview
The GB-RLY-1A5V-SIL is a single in-line (SIP) reed relay designed for use on standard 2.54mm pitch circuit boards. It features a 1-circuit normally open (Form A) contact, making it suitable for various switching applications in electronic circuits. The relay coil is rated for 5V operation, and the contacts can handle up to 0.5A.

Figure 1: Front view of the GB Reed Relay GB-RLY-1A5V-SIL. This image shows the compact black rectangular body of the relay with its pins extending from the bottom, suitable for through-hole mounting on a circuit board.

Figure 2: GB Reed Relay GB-RLY-1A5V-SIL shown with a ruler for size comparison. This image provides a clear indication of the relay's small dimensions, highlighting its suitability for space-constrained applications.
3. Specifications
| Parameter | Value |
|---|---|
| Manufacturer | GB |
| Model Number | GB-RLY-1A5V-SIL |
| Contact Configuration | 1-circuit, Normally Open (Form A) |
| Coil Rated Voltage | 5V |
| Coil Rated Current | 10mA |
| Contact Rating | 0.5A |
| Pin Pitch | 2.54mm (Single In-line Package) |
4. Setup
Follow these steps to properly integrate the reed relay into your circuit:
- Identify Pins: The relay typically has two pins for the coil and two pins for the contacts. Refer to the product datasheet for specific pinout if available.
- Mounting: Insert the relay pins into the appropriate holes on your 2.54mm pitch circuit board. Ensure the relay is seated firmly.
- Coil Connection: Connect the coil pins to a stable 5V DC power source. Observe polarity if indicated on the relay body or datasheet, although many reed relay coils are non-polarized.
- Contact Connection: Connect the two contact pins in series with the load you wish to switch. Since this is a Normally Open (Form A) contact, the circuit will be open (no current flow) when the coil is de-energized.
- Soldering: Carefully solder the pins to the circuit board, ensuring good electrical connections and avoiding solder bridges.
5. Operating Instructions
To operate the GB-RLY-1A5V-SIL reed relay:
- Activation: Apply the rated coil voltage of 5V DC across the coil pins. This will energize the coil, creating a magnetic field that closes the internal reed contacts. The load circuit connected to the contacts will then be completed, allowing current to flow.
- Deactivation: Remove the 5V DC voltage from the coil pins. The magnetic field will collapse, and the reed contacts will return to their normally open state, breaking the load circuit.
- Load Considerations: Ensure that the current and voltage of the switched load do not exceed the contact rating of 0.5A. Exceeding these ratings can damage the relay and shorten its lifespan.
6. Maintenance
The GB Reed Relay GB-RLY-1A5V-SIL is a sealed component and generally requires no user maintenance. However, adhering to the following guidelines can help ensure its longevity:
- Environmental Conditions: Operate the relay within specified temperature and humidity ranges. Avoid exposure to excessive moisture, dust, or corrosive gases.
- Cleaning: If necessary, gently clean the exterior of the relay with a dry, soft cloth. Do not use harsh chemicals or solvents.
- No User-Serviceable Parts: Do not attempt to open or repair the relay, as it contains no user-serviceable parts and doing so will void any potential warranty.
7. Troubleshooting
If you encounter issues with your GB Reed Relay, consider the following:
- Relay Not Activating:
- Verify that the 5V DC coil voltage is correctly applied and stable.
- Check for proper connections to the coil pins.
- Ensure the coil current (10mA) is being supplied.
- Contacts Not Switching Load:
- Confirm the relay coil is energized (see above).
- Check the load circuit for continuity and proper connections to the contact pins.
- Ensure the load current and voltage do not exceed the relay's contact rating (0.5A). Overloading can cause contact welding or damage.
- Intermittent Operation:
- Check for loose connections or cold solder joints.
- Ensure the power supply to the coil is stable and free from noise.
8. Warranty and Support
Specific warranty details for the GB Reed Relay GB-RLY-1A5V-SIL are not provided in the product information. For warranty claims or technical support, please contact your point of purchase or the manufacturer directly. Keep your purchase receipt as proof of purchase.