The Songle 5-Pin Relay (SRD Series) is the industry standard for reliable, low-cost power switching in a compact "sugar cube" form factor. Designed for maximum versatility, this series offers a full range of coil voltages—including 5V, 6V, 9V, 12V, 24V, and 48V DC—making it the go-to component for everything from micro-controller projects to industrial control boards.
10A Switching Capacity: Small but mighty, these relays handle up to 10A at 250VAC or 10A at 30VDC, suitable for appliances and heavy electronics.
Full Voltage Range: Available in multiple DC coil ratings (5V / 6V / 9V / 12V / 24V / 48V) to suit any power supply architecture.
SPDT Contact Form: Features a Single Pole Double Throw (1 Form C) configuration with 5 pins, allowing you to switch between two different output paths.
High-Reliability Sealed Design: The flux-sealed blue housing protects internal components from oxidation and solder flux during the manufacturing process.
Global Certifications: Fully recognized by UL, CSA, TUV, and CQC, ensuring safety compliance for international markets.
The Songle SRD Series is a foundational component for:
Smart Home & IoT: Ideal for 5V Arduino or ESP32 projects controlling lights and fans.
Automotive Accessories: 12V and 24V models are perfect for auxiliary lighting and central locking systems.
Industrial Automation: Used in PLC output modules and signal isolation for 24V or 48V control logic.
Appliance Repair: Standard replacement relay for microwave ovens, coffee makers, and HVAC controllers.
Pin Count: 5 Pin PCB Through-Hole.
Contact Rating: 10A 250VAC / 10A 125VAC / 10A 30VDC / 10A 28VDC
Can I use a 12V relay on a 5V circuit?
No. The coil requires its rated voltage to create a strong enough magnetic field to pull the internal switch. A 12V relay will not activate on a 5V supply.
What is the 5th pin for?
A 5-pin relay has two pins for the coil, one Common (COM) pin, one Normally Closed (NC) pin, and one Normally Open (NO) pin. This allows you to choose whether the circuit is "on" or "off" when the relay is unpowered.
Can I mount this without a PCB?
While designed for PCB mounting, hobbyists often solder wires directly to the pins. However, for high-current use, it is best to use a Prototype PCB to ensure the connections can handle 10A safely.
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