It's designed for motor protection and isolation (IEC 60947-1). The trip unit combines thermal-magnetic overload protection with electronic short-circuit detection, giving you adjustable curves and a magnetic tripping current of 1955 A. Breaking capacity is substantial: 120 kA Icu at 220–240 V AC (IEC 60947-2), 100 kA at 380–415 V, and 70 kA at 440 V. Under UL 60947 it carries 100 kA at 240 V and 65 kA at 480Y/277 V. That covers high-fault panels without an upstream fuse.
Standards compliance includes CSA C22.2 No 60947-4-1, UL 60947-4-1, EN/IEC 60947-4-1, and EN/IEC 60947-2. The part also carries a 960 °C glow-wire rating (IEC 60695-2-11) and is rated for isolation. Pollution degree 3 suits industrial environments.
Dimensions: 6.1 x 3.2 x 4.6 in (155 x 81 x 116 mm). IP40, IK07. Tightening torque of 79.7 lbf.in (9 N·m) on the main power terminals, which accept solid conductors up to 95 mm² on the bottom. The EverLink BTR screw connectors handle solid and flexible cable — top side up to 70 mm² solid. Operates in any position. Mechanical durability is 40,000 cycles; electrical durability 10,000 cycles at AC-3 (440 V, In/2). Maximum operating rate of 25 cycles per hour keeps thermal stress under control during repetitive start/stop.
Selection Notes
Rated for motor power up to 37 kW at 400–415 V AC, 75 kW at 660–690 V. Insulation voltage Ui 800 V AC. Phase failure sensitivity is included per IEC 60947-4-1. The utilisation category is both Category A (IEC 60947-2) and AC-3 (IEC 60947-4-1). Power dissipation is 4.6 W per pole — worth accounting for in enclosed panels to avoid derating. Climatic withstand per IACS ensures reliability in humid or salt-laden environments.