Phoenix Contact 0912018 Electronic Circuit breaker, Supply Voltage: 18 to 32 V dc, Safety Voltage Maximum: 24 V dc, Safety Current Resistance: 5.07Ω, Safety Current Maximum: 2A, Signal Type: Analogue, Minimum Operating Temperature: 0°C, Maximum Operating Temperature: +50°C, Operating Temperature Range: 0 to +50 °C, Series: ECP 1-2