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Siemens 3RT1034-3BD40 — Contactors

Siemens 3RT1034-3BD40 SIRIUS Power Contactor, S2 Size, 18.5

MPN3RT1034-3BD40

Siemens SIRIUS, power contactor, 3RT1034-3BD40, S2 size, 18.5 kW at 500 V AC-3, screw-type terminals, DIN rail snap-on mounting, 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

3RT1034-3BD40 — Identification
ParameterValue
Contactor frame sizeS2
3RT1034-3BD40 — 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
3RT1034-3BD40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1034-3BD40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1034-3BD40 — 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
3RT1034-3BD40 — 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
3RT1034-3BD40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1034-3BD40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1034-3BD40 — Mechanical
ParameterValue
Width55 mm
Height112 mm
Depth130 mm

Product details

The S2 footprint is 55 mm wide, 112 mm tall, 130 mm deep — a standard slice that fits alongside other SIRIUS gear. Main circuit terminals are screw-type, accepting 2x (0.75…25 mm²) stranded or 2x (0.25…2.5 mm²) solid. Auxiliary terminals take 2x (0.75…16 mm²) solid or stranded.

Ratings That Drive Selection

AC-3 motor switching is the headline: 18.5 kW at 500 V and 10 kW at 690 V. AC-3 allows 1 000 ops/h; AC-4 jogging is limited to 250 ops/h. The coil picks up at 80 % of rated control voltage (42 V) and drops out at 110 %, so it holds in during sags but releases cleanly on brownout.

Frequently asked questions

What is the closest functional alternative to the 3RT1034-3BD40?

The 3RT1034-1AN60-1AA0 is a peer in the same SIRIUS S2 frame. The main difference is the coil voltage and terminal type — the -3BD40 uses screw terminals, while the -1AN60-1AA0 carries a different coil variant. Both share the same S2 footprint and AC-3 motor ratings, so a panel designed for one can accept the other without rewiring, provided the coil supply matches.

What compliance documentation does the 3RT1034-3BD40 carry?

RoHS compliance is confirmed with a substance prohibition date of May 1, 2012. The contactor is designed for IEC and EN standards (pollution degree 3, EN 50022 rail). UL/CSA listing is typical for SIRIUS contactors but not explicitly confirmed in this variant's entry.

What wire sizes does the 3RT1034-3BD40 accept?

Main circuit screw terminals accept 2x (0.75…25 mm²) stranded or 2x (0.25…2.5 mm²) solid. Auxiliary terminals accept 2x (0.75…16 mm²) solid or stranded. At 40 °C the minimum permissible conductor is 16 mm² for the main circuit.

MPN
3RT1034-3BD40