MCCB for feeder and distribution panels
It's a current-production part, so no last-time-buy scramble; availability is confirmed at quote time through independent distribution channels.
Breaking capacity is the key selection parameter here: at 240 V it interrupts 330 kA, at 415 V and 440 V it handles 242 kA, at 500 V it drops to 187 kA, and at 690 V it's rated 6.3 kA. At 690 V the 6.3 kA limit means it's not intended for 690 V main feeders; that's a coordination constraint to check against your transformer and upstream protection.
Thermal derating and continuous current
Above 50 °C it derates linearly: 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. Maximum power loss is 50.5 W.
No auxiliary contact block is factory-fitted — if you need status feedback, you'll add one externally via the accessory slot.
Overcurrent release and protection functions
The overcurrent release is an ETU320 electronic trip unit — that's the standard electronic release for line protection on this frame size. It provides LSI protection (long-time, short-time, instantaneous) with adjustable settings. No ground-fault monitoring, no voltage trigger, no communication function, and no phase-failure detection on this variant. The trip indicator is not fitted, so you won't get a visual flag after a trip event — factor that into your maintenance walk-down procedure.
Environmental limits and storage
Storage range is wider: -40 °C to 80 °C. Mechanical endurance is 20,000 operations (latching cycles).