MCCB for distribution panels — the key ratings that govern fit
Its 25 A thermal-magnetic TM-D trip unit provides both short-circuit and overload protection in a single device, with a rated insulation voltage of 690 V AC and a maximum operational voltage of 550 V AC (50/60 Hz) or 250 V DC. At 400–415 V AC the Icu drops to 10 kA, and at 550 V AC to 5 kA, so the voltage at the point of installation directly governs the available fault current the breaker can interrupt.
Thermal-magnetic trip and environmental limits
Mechanical durability is rated at 13,000 cycles.
Mounting and connection
The connection pitch is 25 mm, and the overall dimensions are 75 mm wide × 130 mm high × 60 mm deep. The enclosure is IP20 (finger-safe) and IK07 (impact-resistant to 2 J). No earth-leakage or neutral protection module is integrated — this is a straight 3-pole breaker for 3-phase 3-wire systems.
