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Siemens 3VA2440-8KQ42-0AA0 — Molded Case Circuit Breakers (MCCB)

Siemens SENTRON 3VA2440-8KQ42-0AA0 MCCB, 400 A, 440 kA at 24

MPN3VA2440-8KQ42-0AA0
Active

Siemens SENTRON 3VA2440-8KQ42-0AA0, molded case circuit breaker, 4-pole, 400 A rated, 440 kA at 240 V, line protection with communication and ground-fault monitoring.

Siemens 3VA2440-8KQ42-0AA0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3VA2440-8KQ42-0AA0 — Identification
ParameterValue
Product designationMolded case circuit breaker
Brand / rangeSENTRON
3VA2440-8KQ42-0AA0 — Ratings
ParameterValue
Number of poles4
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 °C400 A
Current at 60 °C400 A
Current at 65 °C400 A
Current at 70 °C400 A
Switching capacity classL
Breaking capacity at 240 V440 kA
Breaking capacity at 415 V330 kA
Breaking capacity at 440 V330 kA
Breaking capacity at 500 V220 kA
Breaking capacity at 690 V52.5 kA
Power loss, max.63.5 W
3VA2440-8KQ42-0AA0 — Protection & Trip Unit
ParameterValue
Overcurrent release (trip unit) typeETU860
Overcurrent protection functionLSIG
Ground-fault monitoringSummation current formation L + N conductor
Grounding protection functionYes
3VA2440-8KQ42-0AA0 — Construction & Connection
ParameterValue
Main circuit connection typeon both sides nut keeper kit
Main circuit connector arrangementFront terminal
Protection class (IP), frontIP40
3VA2440-8KQ42-0AA0 — Accessories & Functions
ParameterValue
Undervoltage releaseNo
Voltage triggerNo
Trip indicatorNo
Communication functionYes
Measurement functionYes
Motor drive optionYes
Auxiliary CO contacts0
3VA2440-8KQ42-0AA0 — Environmental
ParameterValue
Operating temperature, max.70 °C
Operating temperature, min.-25 °C
Storage temperature, max.80 °C
Storage temperature, min.-40 °C
3VA2440-8KQ42-0AA0 — Mechanical
ParameterValue
Mechanical service life (operating cycles), typ.20 000
Height248 mm
Width184 mm
Depth110 mm
Height (in)9.76 in
Width (in)7.24 in
Depth (in)4.33 in

Product details

The Siemens SENTRON 3VA2440-8KQ42-0AA0 is a 4-pole molded case circuit breaker rated for 400 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed up to that ceiling. Its interrupting capacity hits 440 kA at 240 VAC, 330 kA at 415/440 V, and still delivers 220 kA at 500 V, 52.5 kA at 690 V. That SCCR headroom means it can sit at the main or feeder position in high-fault panels without cascading coordination issues upstream.

Integration — panel fit and wiring notes

The 4-pole footprint matches standard SENTRON 3VA panel cutouts; verify busbar and lug spacing against your existing switchboard layout. Power loss is 63.5 W maximum — account for thermal rise in a sealed enclosure.

Frequently asked questions

Where can I buy 3VA2440-8KQ42-0AA0 and how is it quoted?

This part is sourced and quoted to order through independent distribution. Submit an RFQ for current availability and pricing — confirmed at quote time.

What are the key ratings of 3VA2440-8KQ42-0AA0?

Rated 400 A continuous (no derating from 40 °C to 70 °C), 4-pole, with interrupting capacity of 440 kA at 240 V, 330 kA at 415/440 V, 220 kA at 500 V, and 52.5 kA at 690 V.

What compliance documentation does Siemens provide for this MCCB?

As a SENTRON molded case circuit breaker, it is designed to meet IEC/UL standards typical for the class. Specific RoHS, REACH, and UL documentation is available from Siemens upon request.

MPN
3VA2440-8KQ42-0AA0