1-pole MCCB for line protection, 63 A, 121 kA at 240 V
The Siemens SENTRON 3VA1163-5ED16-0AA0 is a 1-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current Iu of 63 A. Its TM210 thermal-magnetic release provides LI protection — thermal overload (L) and instantaneous short-circuit (I) — with a fixed short-circuit pickup of 630 A. The interrupting capacity hits 121 kA at 240 VAC, dropping to 9 kA at 415 VAC; that 121 kA figure means it can safely clear a fault on a high-capacity transformer secondary without upstream fuses needing to coordinate. Thermal derating is published: 63 A continuous through 50 °C, then steps down to 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C. If the panel ambient runs above 50 °C, the continuous load must be reduced accordingly — the 63 A nameplate rating is only valid up to that threshold. Mechanical footprint: 25.4 mm wide (1 inch), 130 mm tall, 70 mm deep. That single-pole width matches standard DIN-rail spacing, so it slots into a panel without needing extra rail real estate. Front face is IP40 — protected against tools and wires over 1 mm, but not sealed against moisture.
Sourcing and lifecycle
Maximum power loss is 5.77 W at rated load — negligible for panel thermal budgeting, but worth noting if the breaker is tightly ganged in a sealed enclosure.
DC rating and application notes
Maximum rated operational voltage for DC circuits is 125 V. If the breaker is used in a DC bus or battery string, that sets the ceiling — no series-strapping for higher voltage is implied by the single-pole construction. Storage temperature range is -40 °C to 80 °C; operating ambient is -25 °C to 70 °C. The storage minimum matters if the breaker sits in an unheated warehouse before installation — it can handle the cold, but should be at operating temperature before being loaded.