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Siemens 3VA2040-5HM42-0AA0 — Molded Case Circuit Breakers (MCCB)

Siemens 3VA2040-5HM42-0AA0 SENTRON MCCB, 40 A, 4-Pole, 187 k

MPN3VA2040-5HM42-0AA0
Active

Siemens SENTRON 3VA2 series molded case circuit breaker, 3VA2040-5HM42-0AA0, 4-pole, 40 A rated, adjustable thermal-magnetic trip 16–40 A, 187 kA breaking capacity at 240 V AC, line protection design.

$369.57Ref. price · indicative, final on quote
Siemens 3VA2040-5HM42-0AA0 datasheet (PDF)
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3VA2040-5HM42-0AA0 — Identification
ParameterValue
Product designationMolded case circuit breaker
Brand / rangeSENTRON
3VA2040-5HM42-0AA0 — Ratings
ParameterValue
Number of poles4
Rated operational voltage Ue (AC)690 V
Rated insulation voltage Ui800 V
Current at 40 °C40 A
Current at 45 °C40 A
Current at 50 °C40 A
Current at 55 °C40 A
Current at 60 °C40 A
Current at 65 °C40 A
Current at 70 °C40 A
Switching capacity classM
Breaking capacity at 240 V187 kA
Breaking capacity at 415 V121 kA
Breaking capacity at 440 V121 kA
Breaking capacity at 500 V75.6 kA
Breaking capacity at 690 V3 kA
Power loss, max.2.2 W
3VA2040-5HM42-0AA0 — Protection & Trip Unit
ParameterValue
Overcurrent release (trip unit) typeETU330
Overcurrent protection functionLIG
Ground-fault monitoringSummation current formation L + N conductor
Grounding protection functionYes
3VA2040-5HM42-0AA0 — Construction & Connection
ParameterValue
Main circuit connection typeon both sides nut keeper kit
Main circuit connector arrangementFront terminal
Protection class (IP), frontIP40
3VA2040-5HM42-0AA0 — Accessories & Functions
ParameterValue
Undervoltage releaseNo
Voltage triggerNo
Trip indicatorNo
Communication functionNo
Measurement functionNo
Motor drive optionYes
Auxiliary CO contacts0
3VA2040-5HM42-0AA0 — Environmental
ParameterValue
Operating temperature, max.70 °C
Operating temperature, min.-25 °C
Storage temperature, max.80 °C
Storage temperature, min.-40 °C
3VA2040-5HM42-0AA0 — Mechanical
ParameterValue
Mechanical service life (operating cycles), typ.25 000
Height181 mm
Width140 mm
Depth86 mm
Height (in)7.13 in
Width (in)5.51 in
Depth (in)3.39 in

Product details

Rated 40 A continuous with a thermal-magnetic trip adjustable from 16 A to 40 A, it clears faults at 187 kA at 240 V AC, dropping to 121 kA at 415/440 V and 75.6 kA at 500 V.

Trip adjustment and ground-fault monitoring

The thermal-magnetic trip unit is field-adjustable via the rotary dial on the front face — set it anywhere between 16 A and 40 A in discrete steps. This lets you match the breaker to the actual continuous load without swapping the entire unit. The ground-fault monitoring version uses summation current formation on L + N conductors, meaning it measures vector sum of phase and neutral currents to detect leakage to earth.

The 3VA2040-5HM42-0AA0 measures 140 mm wide, 181 mm tall, and 86 mm deep — a 4-pole frame that occupies the same footprint as other 3VA2 4-pole breakers in the 40 A class.

That is unusual for a thermal-magnetic MCCB; many competitors start derating above 40 °C.

Frequently asked questions

Where can I buy 3VA2040-5HM42-0AA0 and how do I get a price?

This part is sourced through independent distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time — submit an RFQ through this listing.

When sourcing 3VA2040-5HM42-0AA0, what's the closest functional second-source — 3VA2040-8HN42-0AA0?

The 3VA2040-8HN42-0AA0 is the closest sibling in the same frame size and current rating. The key difference is the trip unit: the -5HM42-0AA0 uses a thermal-magnetic trip, while the -8HN42-0AA0 uses an electronic trip unit with additional adjustability and communication options. Both share the same 140 mm width, 181 mm height, and 86 mm depth, so they drop into the same panel footprint without rewiring.

What is 3VA2040-5HM42-0AA0's listed depth (86 mm) on this component line?

The listed depth is 86 mm (3.39 in), which is standard for the 3VA2 4-pole frame at this rating.

What is 3VA2040-5HM42-0AA0's listed width (140 mm) on this component line?

The listed width is 140 mm (5.51 in), matching the 4-pole frame width across the 3VA2 series.

Will 3VA2040-5HM42-0AA0 drop into a panel that was specified around 3VA2040-8HN42-0AA0 without rewiring?

Yes — both breakers share the same 140 mm width, 181 mm height, and 86 mm depth, and both are 4-pole. The mounting footprint and terminal positions are identical, so no busbar or wiring changes are needed. The only difference is the trip technology (thermal-magnetic vs. electronic), which affects protection curve adjustability but not physical fit.

MPN
3VA2040-5HM42-0AA0