It carries a continuous current rating of 63 A at 40 °C, and derates predictably through 70 °C — at 70 °C ambient it still holds 58 A, which gives you thermal headroom in a crowded enclosure. The 4-pole configuration suits three-phase plus neutral applications where you need coordinated overcurrent protection on all four conductors.
The interrupting rating is the headline number for this frame size: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V. That simplifies panel layout and reduces component count.
Overcurrent release and protection design
The overcurrent release is a TM220 — a thermal-magnetic fixed-trip type. The 'TM' indicates thermal-magnetic; the '220' is Siemens' code for the specific trip curve and rating. This is a line-protection design, meaning it is intended for cable and busbar protection rather than motor or generator protection. It does not carry a ground-fault monitoring version, undervoltage release, or communication function — it is a straightforward, non-communicating MCCB for standard distribution duty.
The 4-pole width at 101.6 mm is the standard 4-module width for SENTRON 3VA fixed breakers — it occupies four 25.4 mm (1-inch) positions on a DIN rail or mounting plate. No trip indicator is fitted on this variant.