RELAY DC 9V 10A SPDT SMI-09VDC-SL-C

The RELAY DC 9V 10A SPDT (part number SMI-09VDC-SL-C) is an electromagnetic relay with a 9 V DC coil and a single changeover contact rated at 10 A. When the coil is energised, the common terminal moves from the normally closed contact to the normally open one, so a small control circuit can switch a separate, higher-current load on or off. It suits 9 V battery and adapter projects, control panels and Arduino-based automation.

RELAY DC 9V 10A SPDT Specifications

• Part number: SMI-09VDC-SL-C
• Coil voltage: 9 V DC
• Contact rating: 10 A
• Contact form: SPDT, 1 changeover (COM, NO and NC)
• Terminals: 5 (2 coil, COM, NO, NC)
• Isolation: the coil circuit and the switched contacts are electrically separate

RELAY DC 9V 10A SPDT Applications

• Switching lamps, fans, pumps and solenoids from a microcontroller
• Home automation and access control circuits
• Changing over between two loads or two power sources
• Building custom relay boards for 9 V systems
• Electronics training and student projects

What's in the Box

• 1 × SMI-09VDC-SL-C 9 V DC SPDT relay

Tip: Do not drive the coil straight from an Arduino or ESP32 pin; switch it with an NPN transistor such as the 2N2222 or a logic-level MOSFET, and fit a flyback diode such as the 1N4007 across the coil with the cathode to the positive side. Check the contact voltage rating printed on the relay before switching mains loads.

Orders placed before 14:00 are ready for pickup the same day. Delivery across Lebanon usually takes 1–3 working days.