50 A rated current — the motor sizing anchor
The line rated current of 50 A sets the motor full-load current ceiling for this TeSys Deca MPCB. That 50 A figure is the continuous rating under IEC 60947-4-1, so it governs the thermal overload protection band — the motor's FLA must fall within the adjustable trip range of the electronic thermal-magnetic trip unit. At 400...415 V AC, the GV4PEM50S covers motor power ratings from 11 kW up to 22 kW depending on the voltage tap. At 660...690 V AC, it reaches 45 kW — a wide power band for a single frame size, which simplifies panel stock for multi-voltage installations.
120 kA breaking capacity — where the SCCR headroom lives
That places the GV4PEM50S well above typical 10 kA or 18 kA panel SCCR requirements — it can sit at the feeder head without cascading an upstream fuse or breaker for fault current alone. At 480Y/277 V the UL rating is 65 kA, and at 600Y/347 V it drops to 25 kA — still adequate for most North American industrial panelboards.
Electronic thermal-magnetic trip — two protection layers in one
The trip unit combines electronic overload sensing with a magnetic short-circuit element. The magnetic tripping current is fixed at 850 A — that is 17× the 50 A rated current, which means the instantaneous trip rides above motor inrush (typically 6–8× FLA) and only clears on hard faults. Phase failure sensitivity is built in per IEC 60947-4-1. If one phase drops, the electronic overload detects the imbalance and trips before the motor single-phases to destruction — a standard requirement for motor protection, but not every MPCB includes it as a default feature.
Panel fit — dimensions, terminals, and mounting
It operates in any position, which simplifies layout in crowded enclosures where vertical or horizontal mounting is the only option. EverLink BTR screw terminals accept solid copper from 1.5 mm² up to 95 mm² on the bottom and 70 mm² on the top. The clamping torque is 9 N·m for the larger range — the EverLink design maintains contact pressure through thermal cycling, reducing the need for periodic retorquing on high-current motor circuits.
Durability and environmental ratings
That is a solid service life for a motor-starting application — expect the contacts to outlast the motor's overhaul interval in most process lines. IP40 protection keeps out tools and particles over 1 mm — standard for a panel-mounted device. The enclosure also carries IK07 impact resistance and a glow-wire fire resistance of 960 °C per IEC 60695-2-11, so it meets the thermal stress requirements for unmonitored industrial panels.