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Siemens 3RT1023-1BE40 — Contactors

Siemens 3RT1023-1BE40 SIRIUS Power Contactor, Size S0, 10 A

MPN3RT1023-1BE40

Siemens SIRIUS, power contactor, Size S0, 3RT1023-1BE40, AC-12 10 A, AC-2 4 kW at 400 V, AC-4 8.5 A at 400 V, screw terminals, DIN-rail snap-on mounting, IP20 front.

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

3RT1023-1BE40 — Identification
ParameterValue
Contactor frame sizeS0
3RT1023-1BE40 — 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
3RT1023-1BE40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1023-1BE40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1023-1BE40 — 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
3RT1023-1BE40 — 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
3RT1023-1BE40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1023-1BE40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1023-1BE40 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth101 mm

Product details

Rated 10 A in AC-12 duty, so it handles resistive and lightly inductive loads up to that current. For motor switching, it delivers 4 kW at 400 V in AC-2 (slip-ring motor start/run) and 8.5 A at 400 V in AC-4 (plugging/inching). DC switching is covered: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V — useful for battery-backed or DC distribution circuits.

Integration Notes

Screw-type terminals on the main current circuit accept 2x (1 to 2.5 mm²) or 2x (2.5 to 6 mm²) stranded, up to 2x 10 mm². The auxiliary circuit uses 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid, max 2x (0.75 to 4 mm²). IP20 on the front, IP00 at the terminals — panel builders should account for terminal protection in the enclosure design. Coil holding power is 5.4 W DC, and the magnet coil draws the same closing power. Pollution degree 3 suits industrial environments with conductive contamination.

Frequently asked questions

Where can I buy 3RT1023-1BE40 and how do I get a price?

Submit an RFQ through this listing. The part is sourced to order via independent distribution; availability and current pricing are confirmed at quote time.

Will 3RT1023-1BE40 drop into a panel that was specified around 3RT1023-1AL20 without rewiring?

Both are Size S0 SIRIUS contactors with the same 45 mm width and DIN-rail mounting, so the mechanical fit is identical. The 1BE40 uses a DC coil (24 V nominal) while the 1AL20 uses an AC coil — verify the control voltage before swapping.

What compliance documentation does this brand provide for 3RT1023-1BE40?

Siemens SIRIUS contactors typically carry CE, UL, CSA, and CCC certifications; the reference code per DIN EN 81346-2 is Q. Specific certificates should be confirmed at order.

MPN
3RT1023-1BE40