Siemens SENTRON 3VA2063-5HL46-0AA0 — 63 A MCCB with ETU320 Trip Unit
The Siemens SENTRON 3VA2063-5HL46-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for 63 A continuous current, designed for line protection in distribution panels and industrial switchboards. Its ETU320 electronic trip unit provides adjustable overload and short-circuit protection, with a rated insulation voltage of 800 V and a maximum breaking capacity of 187 kA at 240 V AC — sufficient for high-fault-current service entrance or feeder applications. The breaker maintains its full 63 A rating across the entire ambient temperature range from -25 °C to 70 °C, with no derating required up to 70 °C — a practical advantage for panels in hot environments or near heat-generating equipment.
Breaking Capacity by Voltage — Selectivity Planning
The interrupting ratings step down with system voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3 kA at 690 V. This profile suits it for 480 V / 415 V distribution where fault currents are high, but the 3 kA at 690 V means it is not a primary choice for 690 V industrial grids unless the available fault current is very low. The adjustable trip range spans 95 A to 756 A, giving flexibility to coordinate with downstream breakers or motor starters.
Physical Fit and Panel Integration
At 181 mm high, 140 mm wide, and 86 mm deep, this 4-pole MCCB occupies a standard SENTRON 3VA2 footprint. The IP40 front protection means it is suitable for enclosed distribution boards but not for washdown areas. Power dissipation is 5.4 W at rated load — modest enough that ventilation requirements in a typical panel are not driven by this breaker alone.