LS ELECTRIC Metasol Molded Case Circuit Breaker MCCB Standard ABH54c 30A Stroke_271^530mm max 70 °C Weight 830 Spiral Flute Tap (for Hard to Cut Materials) max 70 °C Weight 830 g Specification values above are for model code CQ2WB50 50DMZ as published by SMC 003 J Weight 339 g Specification values above are for model code CDRB2FWU20 180SZ T79L as published by SMC IEC 60947 28 [Icw] rated short time withstand current Trip unit characteristics Thermal magnetic L : for overload protection (long time) I : for instantaneous short circuit protection [Ir] Long time pick up adjustment range Fixed [Iu] Long time pick up adjustment range [tr] Long time delay adjustment range [Isd] Short time pick up adjustment range [tsd] Short time delay adjustment range [Ii] Instantaneous pick up adjustment range Fixed 400 A [Ue] rated operational voltage (AC 50 60 Hz) 690 V AC [Ue] rated operational voltage (DC) 500 V DC [Uimp] rated impulse withstand voltage 8 kV [Ui] rated insulation voltage 1000 V Mechanical durability 25000 cycles Electrical durability (AC) 10000 cycles Electrical durability (DC) Utilisation category Category A Suitability for isolation Yes Reference standard IEC 60947 2 [Icu] rated Ultimate short circuit breaking capacity 100 kA at 220 250 V AC 50 60 Hz