The ESR DA Series is FOTEK’s line of high-power DC to AC SSRs. The ESR 40DA model is the standard version (no integrated heatsink/fan) designed for three-phase or single loads controlled by a DC signal.
Control Input (DC): 4–32 /VDC
Turn off Threshold: < /3 /VDC
Input Current: Max 30 /mA
Control Method: Zero-cross switching (minimizes electrical noise)
Load Voltage (AC): 24–380 /VAC
Max Continuous Current: 40 /A
Surge Withstand:
Surge Current: ~410 /A
I²t (fuse rating): ~664 /A²·s
Leakage Current: ~5 /mA when OFF
Response Time: ~8.3 /ms (for 60 /Hz systems)
Overheat Protection: Built-in thermal cutoff at ≈120 /°C; auto resets below ≈110 /°C
Dielectric Strength: ≥ /4 /kVrms
Insulation Resistance: ≥ /100 /MΩ at 500 /VDC
EMC Immunity: 2 /kV surge protection per EN61000 4 4
Safety Approvals: Conforms to EN60947 4 3 and EN60950
Operating Temp & Humidity: –40 /°C to +80 /°C; 35–85 /% RH
Construction: Robust module designed for industrial setups; mounting options vary by accessory selections.
Ideal for:
Switching mid-power three-phase/single-phase AC loads (heaters, motors, etc.)
Applications requiring silent, spark-free operations and EM interference reduction
Industrial automation systems controlled by PLCs or microcontrollers
Thermal protection and high dielectric rating make it reliable in heavy duty environments.
For applications demanding higher output voltage ranges (up to 480 /VAC), consider the ESR 40DA H model.
If you need integrated cooling and overload protection, the ESR 40DA+ version includes fuse, heatsink, and fan.
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