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Siemens 3VA1050-3ED42-0BC0 — Molded Case Circuit Breakers (MCCB)

Siemens SENTRON 3VA1050-3ED42-0BC0 MCCB, 50A, 4-Pole, 75.6kA

MPN3VA1050-3ED42-0BC0

Siemens SENTRON 3VA1050-3ED42-0BC0, molded case circuit breaker, 4-pole, 50 A at 40 °C, breaking capacity 75.6 kA at 240 V AC, with undervoltage release and 2 auxiliary switches.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

3VA1050-3ED42-0BC0 — Identification
ParameterValue
Product designationMolded case circuit breaker
Brand / rangeSENTRON
Basic switch (supplied) ref.3VA10503ED420AA0
Integrated auxiliary / alarm switch ref.3VA9988-0AA12
3VA1050-3ED42-0BC0 — Ratings
ParameterValue
Number of poles4
Rated operational voltage Ue (AC)690 V
Rated insulation voltage Ui800 V
Current at 40 °C50 A
Current at 45 °C50 A
Current at 50 °C50 A
Current at 55 °C49 A
Current at 60 °C48 A
Current at 65 °C46 A
Current at 70 °C45 A
Switching capacity classN
Breaking capacity at 240 V75.6 kA
Breaking capacity at 415 V52.5 kA
Breaking capacity at 440 V32 kA
Breaking capacity at 500 V7.5 kA
Breaking capacity at 690 V7.5 kA
Power loss, max.17.1 W
3VA1050-3ED42-0BC0 — Protection & Trip Unit
ParameterValue
Overcurrent release (trip unit) typeTM210
Overcurrent protection functionLI
Ground-fault monitoringWithout
Grounding protection functionNo
3VA1050-3ED42-0BC0 — Construction & Connection
ParameterValue
Main circuit connection typenut keeper kit on both ends
Main circuit connector arrangementFront terminal
Protection class (IP), frontIP40
3VA1050-3ED42-0BC0 — Accessories & Functions
ParameterValue
Undervoltage releaseYes
Voltage triggerNo
Trip indicatorNo
Communication functionNo
Measurement functionNo
Motor drive optionNo
Auxiliary CO contacts2
3VA1050-3ED42-0BC0 — Environmental
ParameterValue
Operating temperature, max.70 °C
Operating temperature, min.-25 °C
Storage temperature, max.80 °C
Storage temperature, min.-40 °C
3VA1050-3ED42-0BC0 — Mechanical
ParameterValue
Mechanical service life (operating cycles), typ.20 000
Height130 mm
Width101.6 mm
Depth70 mm
Height (in)5.12 in
Width (in)4 in
Depth (in)2.76 in

Product details

Breaking capacity hits 75.6 kA at 240 V AC and 52.5 kA at 415 V — enough for high-fault utility feeds or transformer secondaries where the available short-circuit current is substantial.

Sizing and selectivity

At 50 A rated current and 4 poles, this MCCB fits as a main or feeder breaker in a 3-phase + N panel. This 50 A unit does not drop in for a panel originally specified with the higher-rated 3VA1110-5ED36-0AC0 without re-calculating load and cable sizing.

Panel integration

The 4-pole width matches a 100 mm grid. Maximum power loss is 17.1 W at rated load, so ventilation in a sealed enclosure should account for that dissipation.

MPN
3VA1050-3ED42-0BC0