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Siemens 3RT1034-1KJ84-0LA0 — Contactors

Siemens SIRIUS 3RT1034-1KJ84-0LA0 Power Contactor, S2, 18.5

MPN3RT1034-1KJ84-0LA0

Siemens SIRIUS power contactor, size S2, 3RT1034-1KJ84-0LA0, AC-3 18.5 kW at 400 V, screw-type terminals, 80 x 110 x 167 mm.

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

3RT1034-1KJ84-0LA0 — Identification
ParameterValue
Contactor frame sizeS2
3RT1034-1KJ84-0LA0 — 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
3RT1034-1KJ84-0LA0 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1034-1KJ84-0LA0 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1034-1KJ84-0LA0 — 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
3RT1034-1KJ84-0LA0 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)
Conductor cross-section, solid or stranded2x (0.75 ... 16 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022
Side-by-side mountingYes
3RT1034-1KJ84-0LA0 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1034-1KJ84-0LA0 — Environmental
ParameterValue
Operating temperature range-40 ... +70 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1034-1KJ84-0LA0 — Mechanical
ParameterValue
Width80 mm
Height110 mm
Depth167 mm

Product details

At 80 mm wide, it takes up one standard modular slot. The screw-type main circuit terminals accept stranded wire up to 2x 25 mm², which covers the feed for a 15–18 kW motor circuit without needing a separate terminal block.

Terminal Details and Environmental Limits

Solid wire connections accept 2x (0.5 to 1.5 mm²) and 2x (0.75 to 2.5 mm²), with a maximum of 2x (0.75 to 4 mm²). This covers control wiring for the coil and auxiliary contacts. The RoHS compliance date is May 1, 2012, so it meets the EU directive for new installations.

Frequently asked questions

What are the key ratings for this contactor?

AC-3 motor power is 18.5 kW at 400 V. AC-4 (inching/jogging) current is 29 A at 400 V. The coil is 24 V DC rated at 10 A inrush. Operating temperature range is -40 to +70 °C.

What compliance documentation does this part carry?

RoHS compliance date is May 1, 2012. The contactor is rated for pollution degree 3 per IEC 60947-1, suitable for industrial environments. It mounts on a 35 mm DIN rail per DIN EN 50022.

What wire sizes does the main circuit terminal accept?

Stranded wire: 2x (0.75 to 25 mm²). Solid or stranded: 2x (0.75 to 16 mm²). Solid control wire: 2x (0.5 to 1.5 mm²) and 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). All terminals are screw-type.

MPN
3RT1034-1KJ84-0LA0