It serves as a manual disconnect and protection point in a power distribution circuit, rated for both AC and DC networks. Its headline rating is 200 A conventional free-air thermal current (Ith) at 40 °C, which translates to 200 A at 400 V AC-23A/AC-23B and 160 A at 690 V AC-23A/AC-23B with the terminal cover fitted. This means it handles motor starting and switching loads up to 200 A in a 400 V panel, but the 690 V rating drops to 160 A — a key derating to watch when specifying for higher-voltage lines. Rated operational power reaches 100 kW at 400 V (AC-23A/B) and 150 kW at 690 V (AC-23A/B).
Dimensions are 310 mm wide, 225 mm deep, and 195 mm high — a substantial footprint that needs a clear bay in the panel layout. Power circuit connections accept bars or screw terminals for 95 to 240 mm² flexible cable. Control circuit and power circuit terminals both require 25 N·m tightening torque — a single torque spec simplifies installation but demands a calibrated tool.
Standards and environmental specs
Compliant with IEC 60269-1, IEC 60269-2, and IEC 60947-3 — the core standards for fuse switch disconnectors. Rated insulation voltage is 750 V AC, impulse withstand voltage is 8 kV, and short-circuit withstand is 80 kA. Operates from -20 to 70 °C, stores from -40 to 80 °C. Fire resistance is 960 °C for the body and 850 °C for the fuse cover (per IEC 60695-2-1). Protective treatment is TH (tropicalized) for humid environments. Mechanical durability is 10,000 cycles; electrical durability is 1,000 cycles for AC-23A/B and 200 cycles for DC-23A/B. These cycle counts are modest — this is a disconnect for occasional switching, not a daily-use contactor.