It is an SLA-05VDC-SL-A 4Pin 30A Power Relay. The relay is switched with the help of a small signal from a microcontroller like an Arduino. This relay can be used to drive 30A devices.
Specifications:
- Operating Voltage (VDC): 5
- Supply Current (A): 0.185
- Operating Temperature (°C): -25 to 70
- Opt. Relative Humidity(RH): 45% ~ 85%
- Storage condition (℃): -25 to 70
- Length (mm): 26.85
- Width (mm): 31.6
- Height (mm): 19.5
- Weight (gm): 24
Package Includes:
- 1 x SLA-05VDC-SL-A 4Pin 30A Power Relay

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Ranjan SEN –
Product is so good as aspected.
Ranjan SEN –
Very good product