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Siemens 3RT1023-1DB44 — Contactors

Siemens 3RT1023-1DB44 SIRIUS Power Contactor, 24 V DC, Size

MPN3RT1023-1DB44

Siemens SIRIUS power contactor, 3RT1023-1DB44, Size S0, 24 V DC coil, screw terminals, 4.5 kW at 500 V / 5.5 kW at 690 V, IP20 front, IP00 terminals.

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

3RT1023-1DB44 — Identification
ParameterValue
Contactor frame sizeS0
3RT1023-1DB44 — Ratings & Performance
ParameterValue
Rated operational current, AC-4 @ 400 V8.5 A
Rated value @ 400 V3 A
Rated value @ 500 V4.5 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
3RT1023-1DB44 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1023-1DB44 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1023-1DB44 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 63 A
Short-circuit coordination type 2, fusefuse gL/gG: 25 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT1023-1DB44 — 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
3RT1023-1DB44 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1023-1DB44 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1023-1DB44 — Mechanical
ParameterValue
Width45 mm
Height88 mm
Depth150 mm

Product details

SIRIUS 3RT1023-1DB44 — Power Contactor, Size S0, 24 V DC

Front face is IP20; the terminal area is IP00, meaning the panel builder must guard live parts behind the gland plate. Rated for motor duty: 4.5 kW at 500 V and 5.5 kW at 690 V. In AC-2 duty at 400 V it delivers 4 kW; AC-4 at 400 V is rated 8.5 A. The AC-12 maximum operating current is 10 A. For type 2 coordination, a 25 A gL/gG fuse is required; type 1 coordination calls for a 63 A gL/gG fuse. The contactor carries two instantaneous contacts and a varistor surge suppressor built into the coil circuit.

Solid wire accepted: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). Stranded wire: 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), max 2x 10 mm². AWG equivalents: 2x (16 to 12), 2x (14 to 10), 1x 8. The terminal layout is standard for Size S0 — no special tooling required, but verify the wire range matches your cable before terminating.

Frequently asked questions

What is the depth of 3RT1023-1DB44?

The depth is 150 mm, with a width of 45 mm and height of 88 mm.

What wire sizes does the 3RT1023-1DB44 accept?

Solid wire: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). Stranded: 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), max 2x 10 mm². AWG: 2x (16 to 12), 2x (14 to 10), 1x 8.

Will 3RT1023-1DB44 drop into a panel specified for 3RT1023-1AL20?

Both are Size S0 contactors with the same mounting footprint and terminal layout, so the mechanical fit is identical. The difference is the coil voltage: 3RT1023-1DB44 uses 24 V DC, while the 3RT1023-1AL20 uses a different coil voltage. Verify the control circuit voltage before swapping.

How do I get current pricing and availability for 3RT1023-1DB44?

The 3RT1023-1DB44 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

MPN
3RT1023-1DB44