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Siemens 3RT1017-2KB42 — Contactors

Siemens 3RT1017-2KB42 SIRIUS Power Contactor, 24 VDC Coil, 4

MPN3RT1017-2KB42

Siemens SIRIUS 3RT1017-2KB42 power contactor, size S00, 24 VDC coil, spring-loaded terminals, 45 mm width, IP20.

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

3RT1017-2KB42 — Identification
ParameterValue
Contactor frame sizeS00
3RT1017-2KB42 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V8.5 A
Rated value @ 400 V3 A
Rated value @ 500 V5.5 kW
Rated value @ 690 V5.5 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
3RT1017-2KB42 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1017-2KB42 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1017-2KB42 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 35 A
Short-circuit coordination type 2, fusefuse gL/gG: 20 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT1017-2KB42 — Connection & Mounting
ParameterValue
Main circuit connectionspring-loaded terminals
Aux. / control circuit connectionspring-loaded terminals
Conductor cross-section, solid2x (0.25 ... 2.5 mm²)
Conductor cross-section, solid or stranded2x (0,25 ... 2,5 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
3RT1017-2KB42 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
3RT1017-2KB42 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Installation altitude, max.2 000 m
3RT1017-2KB42 — Mechanical
ParameterValue
Width45 mm
Height60 mm
Depth73 mm

Product details

Its 24 VDC coil draws 2.3 W during both closing and holding, so the control transformer or DC supply doesn't need a big surge margin. The main contacts are rated 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V — enough for small pumps, fans, or conveyor drives up to about 5.5 kW at 400 V in AC-3 duty.

Spring-loaded terminals on both main and control circuits accept 2x (0.25…2.5 mm²) solid or stranded, or 2x (24…14 AWG). No screwdriver needed for the wire connection; strip to 8 mm and push in.

Rated operational voltage covers 24 V to 690 V, so the same contactor works across control voltages and motor voltages in mixed panels.

Short-circuit coordination

With type 2 coordination, the manufacturer specifies a gL/gG fuse of 20 A; type 1 coordination allows up to 35 A. That means you can size the upstream protection to the contactor's rating without over-fusing, keeping fault energy low enough that the contactor stays operational after a short-circuit event (type 2) or is at least safe to replace (type 1).

Frequently asked questions

Where can I buy the 3RT1017-2KB42 and get a price?

This part is sourced and quoted to order through independent distribution. Submit an RFQ; availability and current pricing are confirmed at quote time.

What is the depth of the 3RT1017-2KB42?

The depth is 73 mm, with a width of 45 mm and height of 60 mm.

What wire sizes fit the spring terminals on the 3RT1017-2KB42?

The spring-loaded terminals accept 2x (0.25…2.5 mm²) solid or stranded, or 2x (24…14 AWG) for both main and auxiliary circuits.

Will the 3RT1017-2KB42 drop into a panel specified around the 3RT1016-1BB42?

Both are S00 frame contactors with the same 45 mm width and DIN-rail mounting, so the mechanical fit is identical. The main difference is the coil: the 3RT1016-1BB42 uses a 24 VAC/DC coil, while the 3RT1017-2KB42 is 24 VDC only. Verify the control supply polarity and voltage before swapping.

What compliance documentation does Siemens provide for the 3RT1017-2KB42?

The part carries a substance prohibition date of 01.07.2006, indicating RoHS compliance. Full declarations (RoHS, REACH, UL, IEC) are available from the manufacturer's documentation portal.

MPN
3RT1017-2KB42