What this 800 A MCCB delivers
The Siemens SENTRON 3VA2580-5JP32-0HH0 is a 3-pole molded case circuit breaker rated for a continuous current of 800 A, sized for main feeder or large motor protection in industrial distribution panels. 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. That 187 kA at 240 V means it can sit ahead of a transformer secondary or a large capacitor bank without needing a current-limiting fuse upstream, as long as the available fault current stays under that threshold. 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.
Thermal derating and panel integration
The 800 A rating holds flat from 40 °C up to 60 °C ambient — no derating needed in a typical ventilated enclosure. At 65 °C it drops to 767 A, and at 70 °C to 703 A. If your panel runs hot near the top of a dense lineup, check the actual ambient at the breaker mounting height against these numbers. Maximum power loss is 135 W, which matters for thermal calculations in a sealed enclosure. The operating temperature range spans -25 °C to 70 °C, with storage from -40 °C to 80 °C — the storage limit governs handling and warehousing, not running conditions.
Lifecycle and sourcing posture
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.