Key Specifications
Specification Value / Description
Product Name ABB T6H 630 PR221DS‑I 3P MCCB
Manufacturer ABB
Series / Family SACE Tmax T6
Order Code 1SDA060247R1
Rated Current (In) 630 A
Poles 3 (three‑phase)
Trip Unit Type Electronic trip unit PR221DS‑I
Rated Operational Voltage Up to 690 V AC
Rated Insulation Voltage (Ui) 1000 V AC
Rated Impulse Withstand Voltage (Uimp) 8 kV
Rated Service Breaking Capacity (Ics) up to 70 kA @ 400 V AC (application dependent)
Rated Ultimate Breaking Capacity (Icu) up to ~70 kA @ 400 V AC; lower at higher voltages
Pole Connection Type Fixed with front terminals
Connection Style Bolt connection
Performance Level H (high breaking performance)
Mechanical Durability ~20,000 cycles
Electrical Durability ~7,000 cycles
Power Loss per Pole ~20 W at rated conditions
Protection Roles Overload, short‑circuit, instant fault protection
Standards IEC / EN molded case circuit breaker standards
Degree of Protection IP20 (typical enclosure)
The ABB T6H 630 PR221DS‑I is a fixed‑type molded case circuit breaker designed for industrial and commercial electrical power distribution. It combines a robust breaker frame with a PR221DS‑I electronic trip unit that offers reliable protection and adjustable settings for overload, short‑time and instantaneous fault conditions. The breaker is suitable for protecting feeders, motors, and distribution circuits up to 630 A and is engineered to meet IEC standards for safety and performance. It features front‑mounted bolt‑on connections for easy installation.