Description
SSR-40DA Solid State Relay – Pack of 2
Key Features
- Package Contents: 2 solid state relays
- Model: SSR-40DA
- Control Method: DC to AC
- Input Voltage: 3-32V DC
- Load Voltage: 24-380V AC
- Load Current: 40A
- Switching Mechanism: Electronic, no mechanical parts
- Trigger Type: Zero-cross
- Connections: 4 screw terminals for input and output
Replaces / Cross-Reference Part Numbers
- SSR-40DA
Compatibility & Fitment
- General-purpose component for controlling high-current AC loads with a low-voltage DC signal.
- Suitable for automatic control systems, including temperature controllers, HVAC systems, and industrial machinery.
When to Replace
- Relay fails to activate when input voltage is applied.
- Relay remains stuck in the “ON” position, even with no input voltage.
- Intermittent or unreliable switching of the AC load.
- Visible signs of damage, overheating, or melting on the relay housing.
Installation Tips
- Disconnect all power to the system before installation.
- A heat sink is recommended for loads approaching the 40A rating to ensure proper heat dissipation.
- Ensure all screw terminals are securely fastened to prevent arcing.
- Verify that the wire gauge used is appropriate for the electrical load.
- Confirm input and output connections are correct before applying power.
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