The 3-pole unit carries an ETU850 electronic trip unit with adjustable long-time (Ig) and instantaneous (Ii) pickup, covering 0.5 s minimum response and 375–3000 A short-circuit range. Breaking capacity reaches 187 kA at 240 V, 121 kA at 415 V, and 55 kA at 440 V, so it handles high-fault utility feeds without cascading upstream.
Dimensions: 138 mm wide, 248 mm high, 110 mm deep. The 138 mm width (5.4 in) is the critical dimension for multi-pole grouping on a DIN-rail or backplate — verify your enclosure fill factor against this footprint. Depth of 110 mm leaves room behind the gland plate for wiring and the optional motor drive. The ETU850 trip unit is field-adjustable for Ig (0.5 s minimum) and Ii (375–3000 A). No ground-fault monitoring is integrated — specify an external module if GF protection is required. Neutral conductor protection is not included but is upgradeable/retrofittable. The unit is designed for line protection (cable/feeder), not motor protection; pair it with a separate overload relay for motor circuits.