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With a 3-32V DC signal, the SSR-40DA Solid State Relay manages high-power loads. It switches 24-380V AC circuits without using mechanical contacts. The 40A capacity handles industrial heaters and motors during frequent load shedding cycles.
Key Features
- Photoelectric Isolation: 2500V AC dielectric strength separates input and output circuits. High-voltage spikes won't reach your controller.
- Zero-Crossing Trigger: Switching occurs only when AC voltage crosses the zero point. It reduces electromagnetic interference and noise.
- SCR Output: 1.5V on-state voltage drop with 2mA leakage current. This produces less heat than traditional mechanical contactors.
- Rapid Response Time: 10ms switching speed handles high-frequency industrial automation tasks. Fast cycling won't cause mechanical fatigue.
- LED Status Indicator: Integrated diode signals the presence of DC input voltage. Troubleshooting becomes faster in dark control panels.
Frequently Asked Questions
Does SSR-40DA need a heatsink?
Heatsink mounting is mandatory for loads exceeding 10A. High temperatures destroy the internal semiconductor components.
How to wire SSR-40DA relay?
Connect the DC control signal to terminals 3 and 4. Wire the AC load in series through terminals 1 and 2.
