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SACE Tmax 400A 3P

This is a three‑pole low‑voltage molded case circuit breaker designed for protection of electrical circuits and equipment against overloads, short circuits, and electrical faults in industrial and commercial power distribution systems. The SACE Tmax family offers high interruption capacity in a compact design and supports a range of trip unit options for coordinated system protection.

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Technical Parameters Parameter Typical Specification Rated Current (In) 400 A Number of Poles 3 P Rated Operational Voltage (Ue) Up to 600–690 V AC (50/60 Hz) Rated Insulation Voltage (Ui) ~1000 V AC Rated Impulse Withstand Voltage (Uimp) ~8 kV Short‑Circuit Breaking Capacity (Icu) 35 kA to 100 kA @ 480 V AC (depends on trip unit and design class) Electrical +1 Service Short‑Circuit Breaking Capacity (Ics) Typically equal or close to Icu depending on frame/trip unit Trip Unit Types Thermal‑magnetic (TMA/TMD) or Electronic (PR221DS, Ekip series) Frequency 50/60 Hz Terminal Connection Fixed front terminals Mechanical Durability ~20,000 operations (typical) Standards Compliance IEC 60947‑2 / UL 489 (depending on region)