Relay SPDT 12VDC Coil 12A 5 Pin
🔁 12 V DC Power Relay – SPDT 5 A
Overview
A compact 12 V DC SPDT relay rated for switching up to 5 A at 250 VAC or 30 VDC. Commonly used in automotive, industrial, and hobbyist projects to control high-voltage or high-current loads via a low-voltage signal (e.g., Arduino output, 12 V trigger).
Key Features
Coil Voltage: 12 V DC
Contact Configuration: SPDT (1 Form C) – Common, Normally Open, Normally Closed
Contact Rating: 5 A at 250 VAC / 30 VDC
Coil Power: ~360 mW (400 Ω coil)
Operate/Release Times: ~10 ms / 5 ms
Compact through-hole mounting, PCB-ready
Durable and widely used across electronics applications
Technical Specifications
| Parameter | Value |
|---|---|
| Coil Voltage | 12 V DC |
| Coil Resistance | ~400 Ω (360 mW) |
| Pick-Up Voltage | ~9 V |
| Drop-Out Voltage | ~1.2 V |
| Contact Rating | 5 A @ 250 VAC / 30 V DC |
| Switching Time | ≤10 ms / ≤5 ms |
| Mechanical Life | 10⁷ cycles |
| Electrical Life | 10⁵ cycles @ rated load |
| Insulation Resistance | ≥1000 MΩ @ 500 V DC |
| Dielectric Strength | ≥1500 VAC (coil‑contacts) |
| Operating Temperature | –25 °C to +70 °C |
| Mounting Style | Through-hole PCB |
Wiring to Arduino (12 V Trigger Example):
Coil + → 12 V
Coil – → NPN transistor collector → Arduino GPIO via 1 kΩ resistor
Arduino GPIO → Base of transistor + base resistor (e.g., 4.7 kΩ); include a flyback diode across coil
Common (COM) → Input voltage (e.g., 12 V)
Normally Open (NO) → Load (e.g., motor, lamp) → Ground
Use transistor or MOSFET to avoid drawing coil current directly from Arduino.
Applications
Automotive and accessory power control
Home automation (lighting, pumps, fans)
High-voltage switching with microcontrollers
Isolation between high- and low-voltage circuits
Industrial control and signal routing
Resources
📄 Datasheet – Songle SRD‑12V Relay
Opens to full specifications, including coil/contact diagrams messungbacd.com+6components101.com+6futurlec.com+6futurlec.commessungbacd.com+1futurlec.com+1🎥 YouTube Tutorial – Arduino Relay Control
"How to control a Relay with Arduino" (includes wiring, code, and safety tips) youtube.com+4youtube.com+4youtube.com+4