What the ratings mean for fit
The 3VA2163-5HN32-0DL0 is a Siemens SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. That flat thermal curve is unusual; most MCCBs start derating above 40 °C. For a panel OEM or site engineer, it means the breaker holds its 63 A rating even in a hot enclosure near a drive or transformer, which simplifies coordination studies and avoids a larger frame just for thermal headroom. The interrupting capacity tells the real story for fault duty. At 240 V it clears 187 kA — a very high figure for a 63 A frame, sized for large transformer secondaries or high-capacity busway. At 415 V it still holds 121 kA, and at 500 V it's 75.6 kA. The drop to 3.7 kA at 690 V is a sharp knee; if your system runs 690 V with available fault current above that, this breaker is not the right choice — you need a higher-frame or current-limiting design. For the common 400 V class, 121 kA covers virtually all industrial switchboards.
Built-in accessories and deployment context
This MCCB ships with an undervoltage release (UVR) and a full auxiliary switch complement: two auxiliary switches, one trip alarm switch, and one electrical alarm switch (HQ type). That's enough for remote status indication and undervoltage protection without adding external relays. The trip indicator on the front gives a visual flag for a tripped state — useful during commissioning or fault-finding when you're scanning a row of breakers. Designed for line protection (not motor or generator protection), it mounts in a standard panel or enclosure. Dimensions are 105 mm wide, 181 mm tall, 86 mm deep — a 3-pole frame that fits most 600 V-class distribution sections. Maximum power loss is 6.5 W, so heat buildup in a dense panel is manageable. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.