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Siemens 3VA2125-0HL42-0AA0 — Molded Case Circuit Breakers (MCCB)

Siemens 3VA2125-0HL42-0AA0 SENTRON MCCB, 25 A, 4-Pole, ETU32

MPN3VA2125-0HL42-0AA0
Active

Siemens SENTRON 3VA2125-0HL42-0AA0, molded case circuit breaker, 4-pole, 25 A continuous, ETU320 electronic trip unit, 440 kA breaking capacity at 415 V AC.

Siemens 3VA2125-0HL42-0AA0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3VA2125-0HL42-0AA0 — Identification
ParameterValue
Product designationMolded case circuit breaker
Brand / rangeSENTRON
3VA2125-0HL42-0AA0 — Ratings
ParameterValue
Number of poles4
Rated operational voltage Ue (AC)690 V
Rated insulation voltage Ui800 V
Current at 40 °C25 A
Current at 45 °C25 A
Current at 50 °C25 A
Current at 55 °C25 A
Current at 60 °C25 A
Current at 65 °C25 A
Current at 70 °C25 A
Switching capacity classE
Breaking capacity at 415 V440 kA
Breaking capacity at 690 V187 kA
Power loss, max.0.5 W
3VA2125-0HL42-0AA0 — Protection & Trip Unit
ParameterValue
Overcurrent release (trip unit) typeETU320
Overcurrent protection functionLI
Ground-fault monitoringWithout
Grounding protection functionNo
3VA2125-0HL42-0AA0 — Construction & Connection
ParameterValue
Main circuit connection typeon both sides nut keeper kit
Main circuit connector arrangementFront terminal
Protection class (IP), frontIP40
3VA2125-0HL42-0AA0 — Accessories & Functions
ParameterValue
Undervoltage releaseNo
Voltage triggerNo
Trip indicatorNo
Communication functionNo
Measurement functionNo
Motor drive optionYes
Auxiliary CO contacts0
3VA2125-0HL42-0AA0 — Environmental
ParameterValue
Operating temperature, max.70 °C
Operating temperature, min.-25 °C
Storage temperature, max.80 °C
Storage temperature, min.-40 °C
3VA2125-0HL42-0AA0 — 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

The adjustable N-conductor protection (OFF or 100%) and the absence of ground-fault monitoring or undervoltage release tell you this is a straight line-protection breaker — no bells, no communication module, no voltage-triggered shunt.

Thermal derating and trip unit

The 25 A continuous rating holds flat across the full operating temperature range — 25 A at 40 °C, 45 °C, 50 °C, 55 °C, 60 °C, 65 °C, and 70 °C. No derating curve to chase; the ETU320 electronic trip handles the overload and short-circuit protection with adjustable settings. The minimum adjustable current is 38 A, and the maximum is 300 A, so this breaker covers a wide range of downstream conductor and load sizes from the same frame.

The ETU320 trip unit is field-adjustable; no communication function means no auxiliary wiring beyond the power circuit.

Frequently asked questions

What is the breaking capacity of 3VA2125-0HL42-0AA0?

440 kA at 415 V AC and 187 kA at 690 V AC — sufficient for high-fault-current installations like transformer secondaries or large busway feeds.

Where can I buy 3VA2125-0HL42-0AA0 and how is it quoted?

This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for volume or single-unit pricing.

Will 3VA2125-0HL42-0AA0 drop into a panel specified for 3VA2025-8HM42-0AA0?

Both are 4-pole SENTRON 3VA MCCBs with the same frame dimensions (181 x 140 x 86 mm), so the mechanical footprint is identical. The difference is in the trip unit and accessories — the 3VA2125-0HL42-0AA0 carries the ETU320 electronic trip, while the 3VA2025-8HM42-0AA0 uses a different release. Verify the trip curve and auxiliary contact requirements before swapping, but the panel cutout and busbar spacing are the same.

MPN
3VA2125-0HL42-0AA0