Technical Parameters
Parameter Specification
Product Name ABB T6N800 DC TMA800‑8000 4P FF MCCB
Product Type Molded Case Circuit Breaker (MCCB)
Series / Family ABB SACE Tmax T6N
Rated Current (Iₙ) 800 A
Number of Poles 4 (3 phases + neutral)
Mounting Type Fixed (Fixed Front terminals)
Trip Unit Type Thermal‑Magnetic (TMA)
Protection Functions Overload and short‑circuit protection
Rated Operational Voltage Up to ~690 V AC (typical)
Rated Insulation Voltage (Uᵢ) 1000 V AC
Rated Impulse Withstand Voltage (U<sub>imp</sub>) ~8 kV
Short‑Circuit Breaking Capacity Depends on voltage:
• ~36 kA at 380–415 V AC
• ~25 kA at 500 V AC
• ~15–20 kA at 690 V AC (typical)
DC Capability With appropriate configuration; e.g., several kA at 250–750 V DC (multiple poles in series)
Rated Uninterrupted Current (Iᵤ) 800 A
Terminal Connection Front‑access fixed terminals
Standards Compliance IEC 60947‑2 (and UL/CSA versions on some variants)
Typical Application Protection and switching in power distribution, industrial panels, motor control centers
The ABB T6N800 DC TMA800‑8000 4P FF is a low‑voltage molded case circuit breaker (MCCB) from ABB’s Tmax T6N series designed for electrical protection and switching in industrial and commercial power systems. It is rated for 800 A continuous current and features a thermal‑magnetic (TMA) trip unit providing combined overload and short‑circuit protection in a compact fixed frame.