T90 Relay 12V Coil 5-Pin
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Prices updated: 12 Oct 2026
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About this product
A 5-pin T90 relay with a 12V coil, a common automotive-style relay used to switch a higher-current circuit with a low-current 12V control signal. It suits car accessory wiring, DIY switching circuits and relay-driven projects. Verify the contact rating printed on the relay before connecting a load.
Specifications
- Coil voltage
- 12 V
- Number of pins
- 5
- Relay type
- T90 (5-pin)
Frequently asked questions
How are the 5 pins usually wired?
On a standard 5-pin T90 relay, the coil is connected to pins 85 and 86, the common contact is pin 30, the normally open contact is pin 87, and the normally closed contact is pin 87a. Confirm the pin labels printed on your relay before wiring.
Do I need a flyback diode?
Yes, when the coil is switched by a transistor or microcontroller output. Place a flyback diode across the coil to absorb the voltage spike when the coil is de-energised.
