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Siemens 3RT1034-1BB80 — Contactors

Siemens 3RT1034-1BB80 SIRIUS Power Contactor, S2, 24 VDC, 18

MPN3RT1034-1BB80

Siemens SIRIUS power contactor, size S2, 24 VDC coil, screw-type terminals, 18.5 kW at 500 V AC-3, 55 mm wide, DIN rail mount.

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

3RT1034-1BB80 — Identification
ParameterValue
Contactor frame sizeS2
3RT1034-1BB80 — 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
3RT1034-1BB80 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1034-1BB80 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1034-1BB80 — 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
3RT1034-1BB80 — 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
3RT1034-1BB80 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1034-1BB80 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1034-1BB80 — Mechanical
ParameterValue
Width55 mm
Height112 mm
Depth130 mm

Product details

It is rated for 18.5 kW motor load at 500 V under AC-3 duty, and 15 kW at 400 V under AC-2 duty — the AC-3 figure governs across-the-line starting of standard squirrel-cage motors, while AC-2 covers slip-ring or wound-rotor motors where starting current is lower but switching frequency matters.

Side-by-side mounting is permitted (no derating gap), which keeps panel width tight. Wire range: solid accepts 2x (0.5...1.5 mm²) and 2x (0.75...2.5 mm²) up to 2x (0.75...4 mm²); stranded accepts 2x (0.75...25 mm²). At 40 °C the minimum permissible conductor is 16 mm² — that's the thermal limit for the main circuit under full load, not a wiring convenience spec.

Switching rates and mechanical life

Maximum switching rates: 1 200 cycles/hour at AC-1 (resistive), 750 at AC-2, 1 000 at AC-3, and 250 at AC-4. The AC-4 rate is the constraint for heavy jogging or plugging duty — 250 cycles/hour means roughly one reversal every 14 seconds, which matches typical crane or winch control.

Frequently asked questions

What is the closest functional alternative — 3RT1036-1AB00?

The 3RT1036-1AB00 is a physically larger contactor (size S3 vs S2) and will not drop into the same DIN-rail footprint without re-drilling the panel. The 3RT1034-1BB80 uses a 55 mm wide body; the S3 frame is wider. If the panel has S2 cutouts or pre-drilled mounting holes, stick with this size. For a new build where panel space allows, the S3 carries higher ratings, but the wiring pattern and auxiliary contact layout differ.

What compliance documentation comes with this contactor?

RoHS compliance (substance prohibitance date 05/01/2012), CE marking per Low Voltage Directive, and IEC/EN 60947-4-1 certification are standard. UL/CSA listing is not confirmed in this record — verify with the manufacturer's declaration if UL marking is required for your panel.

What is the depth and how does it affect panel layout?

Depth is 130 mm, width is 55 mm, height is 112 mm. The 130 mm depth includes the arc chamber and coil overhang — ensure at least 150 mm clearance behind the panel door for wiring access and heat dissipation.

MPN
3RT1034-1BB80