63 A MCCB for line protection, active in the SENTRON family
The Siemens 3VA1063-3ED36-0CH0 is a 3-pole SENTRON molded case circuit breaker rated for 63 A continuous current (Iu) at 40 °C, with a TM210 thermal-magnetic overcurrent release. It is configured as a line-protection device — no voltage trip, no ground-fault monitoring, no communication module — so it serves as a straightforward feeder or branch-circuit protector in a distribution panel. Breaking capacity varies with system voltage: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 690 V. The 800 V rated insulation voltage (Ui) means it can be applied in 480/277 V or 600 V industrial panels without derating the insulation envelope.
Thermal derating and panel fit
The breaker holds its full 63 A rating up to 50 °C. Above that, it derates linearly to 60.48 A at 55 °C, 59.22 A at 60 °C, 57.96 A at 65 °C, and 56.7 A at 70 °C — useful to know when the MCCB sits in a crowded enclosure near other heat sources. Footprint is 76.2 mm wide, 130 mm tall, 70 mm deep — a standard 3-pole MCCB width that fits SENTRON panel-mounting systems and most DIN-rail adapters. The front face carries IP40 protection; the rest of the body is open to the enclosure interior.
Auxiliary contacts and undervoltage release
This variant ships with two auxiliary switches plus one trip-alarm switch (HQ configuration) and an integrated undervoltage release (UVR). The UVR coil is designed for the 3VA9608-0BB24 auxiliary release module — if you need to add or replace the undervoltage coil, that is the order code to cross-reference. Mechanical endurance is rated at 15,000 operations — typical for a line-protection MCCB that sees infrequent switching (mostly fault clearing and maintenance isolation).