Semiconductor contactor with current monitoring BH 9251 To monitor max. 12 parallel connected heating elements in packaging machines, plastic moulding machines, blister packaging machines etc. Features . According to IEC/EN 60 947-1, IEC/EN 60 947-4-2 . Switching at zero crossing . To switch single-phase AC load up to 400 V . Compensates voltage fluctuations of ± 20 % . Load current up to 40 A . Monitors: - Undercurrent - Overcurrent - Interrupted load circuit - monitors temperature to protect the power semiconductor . De-energized on fault . One relay output with changeover contact . LED Indicators . No auxiliary supply . Galvanically separated control input X1-X2 with wide voltage range . Adjustable current response value . With integrated heat sink . DIN-rail mounting . 45 mm, 67.5 mm and 112.5 mm width Technical specifications On/Off Input Control: AC/DC Temperature monitoring: Yes Signalling output: Yes Widths: 45, 67,5, 112,5mm Number of poles: 1-pole Load voltage up to: AC 400V Load current up to: 40A Type: BH 9251 Manufacturer: E. Dold & Söhne GmbH & Co. KG Type: BH9251.11 AC230V 50/60HZ 10A Art. No.: 0052267