What this 800 A MCCB delivers
The ETU550 electronic trip unit gives you adjustable long-time pickup (Ir) from 0.5× to 1.0× the 800 A frame, plus short-time and instantaneous settings, so you can shape the trip curve to coordinate with downstream breakers rather than relying on a fixed thermal-magnetic response. Breaking capacity runs 187 kA at 240 V AC, 121 kA at 415 V AC, and 53 kA at 690 V AC — numbers that put it in the high-interrupting class for this frame size. Physically the breaker measures 210 mm wide by 320 mm tall by 120 mm deep, with an IP40 rating on the front face — standard for switchboard mounting where the enclosure provides the overall seal. The 10 000 mechanical endurance cycles reflect a design intended for infrequent switching; this is a protective device, not a daily disconnect switch.
Maximum power loss is 135 W, which matters for thermal calculations in a sealed enclosure.
No official successor has been published for this order code, which is consistent with an active-line part. If you are replacing an older 3VF or 3VL breaker in an existing panel, the 3VA series is the direct platform replacement — but verify the mounting footprint and accessory compatibility against your specific panel layout before ordering.