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Siemens 3VA1440-7MH32-0AA0 — Molded Case Circuit Breakers (MCCB)

Siemens 3VA1440-7MH32-0AA0 SENTRON MCCB, 400 A, 3-Pole, TM12

MPN3VA1440-7MH32-0AA0
Active

Siemens SENTRON 3VA1440-7MH32-0AA0, molded case circuit breaker, 3-pole, 400 A, TM120M overcurrent release, 440 kA at 240 V AC, IP40 front.

Siemens 3VA1440-7MH32-0AA0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3VA1440-7MH32-0AA0 — Identification
ParameterValue
Product designationMolded case circuit breaker
Brand / rangeSENTRON
3VA1440-7MH32-0AA0 — Ratings
ParameterValue
Number of poles3
Rated operational voltage Ue (AC)690 V
Rated insulation voltage Ui800 V
Current at 40 °C400 A
Current at 45 °C400 A
Current at 50 °C400 A
Current at 55 °C392 A
Current at 60 °C384 A
Current at 65 °C376 A
Current at 70 °C367 A
Switching capacity classC
Breaking capacity at 240 V440 kA
Breaking capacity at 415 V242 kA
Breaking capacity at 440 V242 kA
Breaking capacity at 500 V154 kA
Breaking capacity at 690 V17 kA
Power loss, max.76.8 W
3VA1440-7MH32-0AA0 — Protection & Trip Unit
ParameterValue
Overcurrent release (trip unit) typeTM120M
Overcurrent protection functionI
Ground-fault monitoringWithout
Grounding protection functionNo
3VA1440-7MH32-0AA0 — Construction & Connection
ParameterValue
Main circuit connection typenut keeper kit on both ends
Main circuit connector arrangementFront terminal
Protection class (IP), frontIP40
3VA1440-7MH32-0AA0 — Accessories & Functions
ParameterValue
Undervoltage releaseNo
Voltage triggerNo
Trip indicatorNo
Communication functionNo
Measurement functionNo
Motor drive optionYes
Auxiliary CO contacts0
3VA1440-7MH32-0AA0 — Environmental
ParameterValue
Operating temperature, max.70 °C
Operating temperature, min.-25 °C
Storage temperature, max.80 °C
Storage temperature, min.-40 °C
3VA1440-7MH32-0AA0 — Mechanical
ParameterValue
Mechanical service life (operating cycles), typ.20 000
Height248 mm
Width138 mm
Depth110 mm
Height (in)9.76 in
Width (in)5.43 in
Depth (in)4.33 in

Product details

400 A MCCB with TM120M — selectivity and motor protection in one frame

Breaking capacity reaches 440 kA at 240 V AC, dropping to 242 kA at 415/440 V, 154 kA at 500 V, and 17 kA at 690 V — figures that govern fault-clearing capability at the point of common coupling.

Maximum power loss is 76.8 W, which factors into enclosure ventilation sizing. Dimensions are 248 mm high, 138 mm wide, 110 mm deep — a standard 3-pole MCCB footprint for panel-mount installation with IP40 protection on the front face.

Frequently asked questions

What does the TM120M release designation mean?

TM120M is a thermal-magnetic overcurrent release tuned for starter protection — the thermal element handles overloads, the magnetic element handles short-circuits, with a fixed magnetic trip threshold suitable for motor branch circuits.

MPN
3VA1440-7MH32-0AA0