It carries the ETU320 electronic overcurrent release, giving adjustable long-time, short-time, and instantaneous pickup bands rather than a fixed thermal-magnetic curve — useful for coordinating with downstream breakers in a selective distribution panel. Breaking capacity runs 187 kA at 240 VAC, 121 kA at 415/440 VAC, 75.6 kA at 500 VAC, and 3 kA at 690 VAC — high enough for most transformer-fed service entrances and large motor control centers without a current-limiting fuse upstream.
Panel fit and mounting — checklist for the wireman
If you need shunt trip, UVR, or Modbus, step up to the 3VA2 with those option slots populated. Power loss is 0.84 W maximum — negligible for thermal budgeting inside a crowded panel.