Skip to main content
Siemens 3RT1035-1BB44 — Contactors

Siemens 3RT1035-1BB44 SIRIUS Power Contactor, 24 VDC Coil, S

MPN3RT1035-1BB44

Siemens SIRIUS power contactor, 3RT1035-1BB44, S2 frame, 24 VDC coil, screw-type terminals, 55 mm wide, snap-on 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

3RT1035-1BB44 — Identification
ParameterValue
Contactor frame sizeS2
3RT1035-1BB44 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V35 A
Rated value @ 400 V3 A
Rated value @ 500 V22 kW
Rated value @ 690 V11.4 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
3RT1035-1BB44 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1035-1BB44 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1035-1BB44 — 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
3RT1035-1BB44 — 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
3RT1035-1BB44 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1035-1BB44 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1035-1BB44 — Mechanical
ParameterValue
Width55 mm
Height112 mm
Depth179 mm

Product details

The 24 VDC coil pulls in at 0.8 of rated voltage and drops out below that threshold, with an arcing time of 10 to 15 ms at DC and a total break time of 20 to 25 ms.

The 55 mm width and 112 mm height fit a standard S2 footprint; depth is 179 mm including the coil terminals. Side-by-side mounting is permitted with no derating gap, so you can pack several contactors across a single rail segment. Pollution degree 3 rating means it's suitable for the conductive-dust environment inside a typical panel enclosure.

Switching Capacity and Duty Ratings

Rated for AC-3 motor switching at 500 V delivering 22 kW, and at 690 V delivering 11.4 kW. AC-4 inching duty at 400 V is rated at 35 A. The contactor handles 1 200 operations per hour in AC-1 resistive loads, 1 000 ops/h in AC-3, and 300 ops/h in the heavy AC-4 regime. Auxiliary contact ratings at 24 VDC are 10 A, dropping to 0.3 A at 220 VDC.

Frequently asked questions

Where can I buy 3RT1035-1BB44 and how do I get a price?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time.

What is 3RT1035-1BB44's listed depth?

The depth is 179 mm, measured from the DIN rail mounting face to the furthest terminal projection.

What wire sizes does the 3RT1035-1BB44 accept?

Solid conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). Stranded: 2x (0.75 to 25 mm²). Solid or stranded: 2x (0.75 to 16 mm²).

What compliance documentation does Siemens provide for 3RT1035-1BB44?

RoHS compliance is documented with a substance prohibition date of 05/01/2012. The SIRIUS series carries CE marking and UL/CSA approvals as standard for the platform.

MPN
3RT1035-1BB44