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Siemens 3RT1034-3BF40 — Contactors

Siemens SIRIUS 3RT1034-3BF40 Power Contactor, 110 V Coil, 29

MPN3RT1034-3BF40

Siemens SIRIUS 3RT1034-3BF40 power contactor, size S2, 110 V coil, screw terminals, 29 A AC-4 at 400 V, 18.5 kW at 500 V, IP20 front, for DIN rail mounting.

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

3RT1034-3BF40 — Identification
ParameterValue
Contactor frame sizeS2
3RT1034-3BF40 — 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
3RT1034-3BF40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1034-3BF40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1034-3BF40 — 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
3RT1034-3BF40 — 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
3RT1034-3BF40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1034-3BF40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1034-3BF40 — Mechanical
ParameterValue
Width55 mm
Height112 mm
Depth130 mm

Product details

It carries a 110 V coil and is rated for AC-4 duty at 29 A at 400 V, meaning it can handle severe inrush and plugging duty for motors up to that current. At 500 V it is rated for 18.5 kW motor output, and at 690 V for 10 kW. The main circuit uses screw-type terminals, accepting solid wires from 0.25 to 2.5 mm² and stranded wires from 0.75 to 25 mm².

The AC-2 rating at 15 kW at 400 V covers slip-ring motor starting. For resistive loads (AC-1), the maximum switching frequency is 1200 operations per hour; for AC-3 (standard squirrel-cage motor start/run) it is 1000 ops/h, and for AC-4 it drops to 250 ops/h due to the heavier electrical wear. The auxiliary contact ratings at 24 V (10 A), 110 V (1 A), and 230 V (6 A) cover typical PLC or relay interface levels.

Dimensions: width 55 mm, height 112 mm, depth 130 mm. The contactor is rated for use in enclosures with pollution degree 3.

Frequently asked questions

What are the key power ratings for this contactor?

AC-4 at 400 V is 29 A; AC-2 at 400 V is 15 kW; motor output at 500 V is 18.5 kW; at 690 V is 10 kW. Coil voltage is 110 V.

What is the physical size and mounting?

Width 55 mm, height 112 mm, depth 130 mm. Mounts on 35 mm DIN rail per EN 50022 via screw or snap-on. Side-by-side mounting is permitted.

What compliance documentation is available?

RoHS compliant with a substance prohibition date of May 1, 2012. The product is part of the Siemens SIRIUS brand.

MPN
3RT1034-3BF40