Skip to main content
Log in
Siemens 3VA1112-1AA42-0DH0 — Molded Case Circuit Breakers (MCCB)

Siemens 3VA1112-1AA42-0DH0 SENTRON Switch Disconnector, 125

MPN3VA1112-1AA42-0DH0

Siemens SENTRON 3VA1112-1AA42-0DH0, switch disconnector in MCCB design, 4-pole, 125 A continuous, 690 V AC, undervoltage release 208-230 V AC, 2 auxiliary switches HQ + 1 trip alarm switch HQ, busbar connection, IP40 front.

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

3VA1112-1AA42-0DH0 — Identification
ParameterValue
Product designationSwitch disconnector
Brand / rangeSENTRON
3VA1112-1AA42-0DH0 — Ratings
ParameterValue
Number of poles4
Rated operational voltage Ue (AC)690 V
Rated insulation voltage Ui800 V
Current at 40 °C125 A
Current at 45 °C125 A
Current at 50 °C125 A
Current at 55 °C125 A
Current at 60 °C125 A
Current at 65 °C125 A
Current at 70 °C125 A
Power loss, max.38 W
3VA1112-1AA42-0DH0 — Construction & Connection
ParameterValue
Main circuit connection typebusbar connection
Main circuit connector arrangementFront terminal
Protection class (IP), frontIP40
3VA1112-1AA42-0DH0 — Accessories & Functions
ParameterValue
Undervoltage releaseYes
Voltage triggerNo
Trip indicatorYes
Motor drive optionYes
Auxiliary CO contacts3
3VA1112-1AA42-0DH0 — Environmental
ParameterValue
Operating temperature, max.70 °C
Operating temperature, min.-25 °C
Storage temperature, max.80 °C
Storage temperature, min.-40 °C
3VA1112-1AA42-0DH0 — Mechanical
ParameterValue
Mechanical service life (operating cycles), typ.15 000
Height130 mm
Width101.6 mm
Depth70 mm

Product details

Switch disconnector, 125 A, no overload protection

Integrated undervoltage release and auxiliary switching

This variant ships with an undervoltage release (UVR) rated 208-230 V AC 50/60 Hz, plus 2 HQ auxiliary switches and 1 HQ trip alarm switch — three CO contacts total. The UVR trips the disconnector when control voltage drops, which is standard for safety isolation in machine tools or conveyor lines where loss of control power should open the load circuit. Maximum power loss is 38 W at rated current. Mechanical service life is 15 000 operating cycles typical. An optional motor drive can be added via the product extension slot.

Frequently asked questions

What is the closest functional alternative to 3VA1112-1AA42-0DH0?

The 3VA1110-5ED36-0AC0 is a 3-pole molded case circuit breaker (not a switch disconnector) with overcurrent release TM210, rated 100 A at 40 °C, and no undervoltage release. It is a different product class — the 3VA1112-1AA42-0DH0 is a 4-pole disconnect with UVR, so they are not drop-in substitutes without rewiring and re-evaluating protection coordination.

Where can I buy 3VA1112-1AA42-0DH0 and how is it quoted?

This part is sourced to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — no stock count or price is published here.

What compliance documentation is available for 3VA1112-1AA42-0DH0?

The part carries IEC 60947 design (reference code Q per IEC 81346-2) and IP40 front protection. Standard Siemens declarations for RoHS and REACH are available with the product documentation package.

MPN
3VA1112-1AA42-0DH0