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Siemens 3RT1015-1HB42 — Contactors

Siemens 3RT1015-1HB42 SIRIUS Power Contactor, 24 VDC Coil, S

MPN3RT1015-1HB42

Siemens SIRIUS, power contactor, size S00, 3RT1015-1HB42, 24 V DC coil, screw terminals, 45 mm width, IP20 front.

$229.76Ref. price · indicative, final on quote
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

3RT1015-1HB42 — Identification
ParameterValue
Contactor frame sizeS00
3RT1015-1HB42 — Ratings & Performance
ParameterValue
Rated operational current, AC-4 @ 400 V6.5 A
Rated value @ 400 V3 A
Rated value @ 500 V3.5 kW
Rated value @ 690 V4 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
3RT1015-1HB42 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1015-1HB42 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1015-1HB42 — 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
3RT1015-1HB42 — Connection & Mounting
ParameterValue
Main 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, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Side-by-side mountingYes
3RT1015-1HB42 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
3RT1015-1HB42 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1015-1HB42 — Mechanical
ParameterValue
Width45 mm
Height57.5 mm
Depth72 mm

Product details

Panel fit and coil drive

The Siemens SIRIUS 3RT1015-1HB42 is a size S00 power contactor with a 24 V DC coil, designed for screw and snap-on mounting onto a 35 mm standard mounting rail per DIN EN 50022. Coil closing and holding power are both 2.3 W DC, so a standard 24 VDC PSU with a 3 W per-device budget covers it without derating.

Contact ratings and switching duty

Main contacts are rated 10 A at 24 V and 6 A at 230 V, with an AC-4 rating of 6.5 A at 400 V for reversing or inching duty. For resistive loads (AC-12), the maximum operating current is 10 A.

Wiring and protection coordination

Screw-type terminals on the main circuit accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²) solid or stranded conductors. Type 1 coordination allows a 35 A fuse.

Environmental limits

Side-by-side mounting is permitted with 6 mm spacing at the side.

Frequently asked questions

What is the closest functional alternative to 3RT1015-1HB42?

The 3RT1015-1BB42 is the same S00 frame size and contactor family but with a 24 V AC coil instead of DC. The DC coil version (1HB42) gives a harder pull-in and holds without AC hum, preferred for PLC-driven panels where the 24 VDC supply is already present. The AC coil sibling draws a higher inrush and requires a separate transformer if the panel runs on DC control voltage. Panel footprint and terminal layout are identical, so no rewiring is needed for the main power circuit — only the coil supply changes.

What is the depth of this contactor?

The depth is 72 mm.

What conductor sizes does the main terminal accept?

The screw terminals accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²) solid or stranded copper. AWG equivalents are 2x (20 to 16), 2x (18 to 14), and 1x 12.

Will 3RT1015-1HB42 drop into a panel specified for 3RT1015-1BB42?

Yes, the mounting footprint (45 mm width, 57.5 mm height, 72 mm depth) and screw/snap-on DIN rail attachment are identical between the DC and AC coil variants. The main power terminals and auxiliary contact positions are the same. The only difference is the coil supply: the 1HB42 requires 24 VDC, while the 1BB42 requires 24 VAC. If the panel already has a 24 VDC bus, this is a direct swap.

MPN
3RT1015-1HB42