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Siemens 3RT1034-3BE40 — Contactors

Siemens 3RT1034-3BE40 SIRIUS Power Contactor, S2, 18.5 kW at

MPN3RT1034-3BE40

Siemens SIRIUS 3RT1034-3BE40 power contactor, size S2, screw-type terminals, 18.5 kW at 500 V AC-3, 29 A at 400 V AC-4, IP20 front, IP00 terminals.

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

3RT1034-3BE40 — Identification
ParameterValue
Contactor frame sizeS2
3RT1034-3BE40 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V29 A
Rated value @ 400 V3 A
Rated value @ 500 V18.5 kW
Rated value @ 690 V10 kW
Rated value @ 230 V6 A
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT1034-3BE40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1034-3BE40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1034-3BE40 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 125 A
Short-circuit coordination type 2, fusefuse gL/gG: 63 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT1034-3BE40 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionspring-loaded terminals
Conductor cross-section, solid2x (0.25 ... 2.5 mm²)
Conductor cross-section, solid or stranded2x (0.75 ... 16 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.25 ... 1.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022
Side-by-side mountingYes
3RT1034-3BE40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1034-3BE40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1034-3BE40 — Mechanical
ParameterValue
Width55 mm
Height112 mm
Depth130 mm

Product details

It is rated for AC-3 duty at 18.5 kW at 500 V and 10 kW at 690 V, which means it handles standard three-phase induction motors up to those power levels without derating for the inrush.

The main current circuit uses screw-type terminals accepting 2x (0.75 to 25 mm²) stranded or 2x (0.25 to 2.5 mm²) solid wire. At 40 °C the minimum permissible conductor size is 16 mm², which drives the lug selection for the power feed.

Duty cycles and mechanical life

Mechanical life is typical 10,000,000 operations. Maximum switching rates vary by duty: 1,200 cycles/hour for AC-1 resistive loads, 1,000 cycles/hour for AC-3 motor starting, 750 cycles/hour for AC-2 slip-ring motors, and 250 cycles/hour for AC-4 reversing or plugging.

Auxiliary contact ratings and environment

Auxiliary contacts are rated for DC switching: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, and 0.3 A at 220 V.

Frequently asked questions

What are the key motor ratings for this contactor?

AC-3 duty: 18.5 kW at 500 V and 10 kW at 690 V. AC-4 duty: 29 A at 400 V. AC-2 duty: 15 kW at 400 V.

What wire sizes does the screw terminal accept?

Main circuit terminals accept 2x (0.75 to 25 mm²) stranded or 2x (0.25 to 2.5 mm²) solid. At 40 °C ambient, the minimum conductor is 16 mm².

Can this contactor be mounted side-by-side with others?

Yes, side-by-side mounting is permitted without additional derating.

What compliance documentation is available?

RoHS compliance is confirmed with a substance prohibition date of 05/01/2012. The part carries IP20 front / IP00 terminal protection ratings and is designed for pollution degree 3 environments.

MPN
3RT1034-3BE40