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Siemens 3RT2015-1BG42 — Contactors

Siemens SIRIUS 3RT2015-1BG42 Power Contactor, Size S00, 24V

MPN3RT2015-1BG42
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Siemens SIRIUS, Power contactor, 3RT2015-1BG42, Size S00, 24 V DC coil, screw-type terminals, 45 mm width, 73 mm depth, 58 mm height.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
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Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RT2015-1BG42 — Identification
ParameterValue
Contactor frame sizeS00
3RT2015-1BG42 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V6.5 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V0.75 hp
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2015-1BG42 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2015-1BG42 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2015-1BG42 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 35A (690V,100kA), aM: 20A (690V,100kA), BS88: 35A (415V,80kA)
Short-circuit coordination type 2, fusegG: 20A (690V,100kA), aM: 16A (690V, 100kA), BS88: 20A (415V, 80kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT2015-1BG42 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid0.5 ... 4 mm²
Conductor cross-section, solid or stranded2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 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 DIN rail according to DIN EN 60715
Side-by-side mountingYes
3RT2015-1BG42 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2015-1BG42 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2015-1BG42 — Mechanical
ParameterValue
Width45 mm
Height58 mm
Depth73 mm

Product details

It's a current-production part, so it's still coming off the line — no last-time-buy scramble here. It mounts via screw and snap-on onto a standard 35 mm DIN rail per DIN EN 60715, and the mounting position is flexible: it can be rotated ±180° on a vertical surface and tilted ±22.5° forward or backward, which helps when you're squeezing it into a crowded enclosure.

Ratings That Drive the Choice

The coil is 24 V DC, terminated with screw-type terminals. DC coils hold in better on low-voltage rides than AC coils, but they also draw a steady holding current — make sure your 24 VDC supply can handle the inrush and seal current for the number of contactors you're firing up at once. For DC switching (DC-13 duty), it's rated 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, and 0.9 A at 125 V. That's your heater or lighting contactor rating. For motor switching (AC-3), the maximum operating rate is 750 cycles per hour, and for AC-4 (plugging/reversing) it drops to 250 cycles per hour — so if you're jogging a motor hard, watch that duty cycle. It includes an auxiliary switch, which saves you from having to bolt on a separate aux block for basic status feedback or interlocking.

Terminals accept solid or stranded wire from 0.5 mm² up to 4 mm², and you can double up: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm². That's handy for daisy-chaining control power through the contactor without a separate terminal block. That's tighter than some older contactors — you can pack these S00 frames closer together on the DIN rail, which matters when you're filling a panel for a multi-motor line. Main contact terminal torque is 20 to 12 in-lb (the range accounts for different screw sizes on the same block).

Frequently asked questions

What is the closest functional second-source to the 3RT2015-1BG42?

The 3RT2015-1AT62 is a sibling in the same S00 frame size, but it uses a 24 V AC coil instead of DC. The AC coil will have a different inrush profile and may hum louder. It's a drop-in fit for the DIN rail and wiring, but the coil supply must match.

Will the 3RT2015-1BG42 drop into a panel specified around the 3RT2015-1AT62?

Yes, same S00 frame, same 45 mm width, same DIN-rail mounting. The only difference is the coil — 24 V DC vs 24 V AC. No rewiring of the power circuit needed, but the coil supply must be changed from AC to DC.

What is the depth of the 3RT2015-1BG42?

73 mm. That's the dimension from the DIN-rail mounting surface to the front of the contactor body, not counting the coil terminals.

What wire sizes does the 3RT2015-1BG42 accept?

Solid or stranded: 0.5 to 4 mm². Doubled up: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm².

MPN
3RT2015-1BG42