Siemens SENTRON 3VA2580-5HL32-0JA0 — 800 A MCCB with ETU320 Trip Unit
Above 60 °C the rating steps down per the datasheet: 767 A at 65 °C, 703 A at 70 °C. The interrupting capacity is 187 kA at 240 V AC, 121 kA at 415 V AC, and 53 kA at 690 V AC — figures that place it in the high-breaking-capacity class for industrial distribution. The electronic trip unit is an ETU320, with adjustable long-time pickup (Ir) from 320 A to 800 A and instantaneous pickup (Ii) from 1,200 A to 8,000 A. The long-time delay (tr) is adjustable from 0.5 s to 17 s. This gives the specifying engineer selectivity headroom downstream and coordination flexibility upstream — the 800 A frame can be tuned to protect a 400 A feeder without oversizing the cable. Maximum power loss is 135 W, a figure to factor into the panel thermal budget when grouping multiple breakers in a closed enclosure.
Dimensions are 210 mm wide, 320 mm high, and 120 mm deep. The 210 mm width (8.3 in) is the standard 3-pole MCCB footprint for this frame size — it occupies three adjacent 70 mm pole spaces on a DIN-rail or panel-mount base. The 120 mm depth (4.7 in) includes the arc chamber and terminal clearance; verify that the enclosure depth allows for rear cable bending radius and front cover clearance for the rotary handle or motor operator if fitted.
Key Adjustments and Ratings
The ETU320 electronic trip unit provides adjustable long-time (Ir: 320–800 A), short-time (not separately adjustable on this variant), and instantaneous (Ii: 1,200–8,000 A) protection.