Solid state relay 24V / 40A with a solid state output, not short-circuit proof. Control via connections 15 / 31. Ports 15 and 31 are interchangeable. Positive control via 15 or 31, mating pin must be connected to ground. Output bidirectional usable. For controlling inductive loads. No switching noise. Insensitive to vibration and suitable for high switching cycles. Typical applications: - Control of lamps, fans, blowers and all other applications with high switching cycles.