The 3VA2025-8HL42-0AA0: The 4-pole frame with an ETU320 electronic overcurrent release gives you adjustable thermal-magnetic-like curves plus ground-fault alarm capability (though this unit ships without the ground-fault monitoring module). Rated insulation voltage is 800 V, so it handles 480Y/277 V and 600 V delta systems comfortably. Breaking capacity is the headline: 440 kA at 240 V, 330 kA at 415 V, and still 52.5 kA at 690 V. That puts it in the high-interrupting class — suitable for transformer-fed switchboards where fault currents are severe. The IP40 front protection means it's fine in a dry indoor panel; not rated for washdown.
Panel fit and integration
Dimensions are 86 mm deep, 140 mm wide, 181 mm high — a standard SENTRON 3VA2 frame footprint. Mounts on a DIN rail or directly to a backplate via the screw terminals. The 4-pole width (140 mm) occupies roughly 5.5 inches of rail space; plan your gland plate and wireway clearance accordingly. Power loss is only 0.5 W maximum, so heat buildup in a dense panel is negligible. No undervoltage release or communication module on this variant — it's a straight thermal-magnetic replacement with electronic trip adjustment.