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Siemens 3RT1023-3BB40-ZX95 — Contactors

Siemens 3RT1023-3BB40-ZX95 SIRIUS Power Contactor, 24 VDC Co

MPN3RT1023-3BB40-ZX95

Siemens SIRIUS power contactor, Size S0, 24 V DC coil, screw-type terminals, 45 mm width, snap-on DIN-rail mount.

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

3RT1023-3BB40-ZX95 — Identification
ParameterValue
Contactor frame sizeS0
3RT1023-3BB40-ZX95 — 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
3RT1023-3BB40-ZX95 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1023-3BB40-ZX95 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1023-3BB40-ZX95 — 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
3RT1023-3BB40-ZX95 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.25 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.25 ... 1.5 mm²)
Side-by-side mountingYes
3RT1023-3BB40-ZX95 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1023-3BB40-ZX95 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1023-3BB40-ZX95 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth100 mm

Product details

The Siemens 3RT1023-3BB40-ZX95 is a SIRIUS power contactor in the Size S0 frame — the compact workhorse for motor switching in control panels up to 4 kW at 400 V AC-2 duty. The 24 V DC coil pulls 5.4 W on close and holds at the same power, so no extra hold-in resistor needed.

The 45 mm width and 85 mm height leave room for a three-phase feed-through and an auxiliary contact block on the side. Side-by-side mounting is allowed — no derating gap needed for standard resistive loads, though the 6 mm side clearance is the minimum for airflow.

AC-4 at 400 V is 8.5 A, for reversing or inching duty where the contacts see full locked-rotor current each time. The DC coil ratings (10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V) cover auxiliary interposing relays and PLC outputs.

Frequently asked questions

Where can I buy 3RT1023-3BB40-ZX95 and how do I get a price?

This contactor is sourced through independent distribution. Submit an RFQ — availability and current pricing are confirmed at quote time.

Will 3RT1023-3BB40-ZX95 drop into a panel that was specified around 3RT1023-1AL20 without rewiring?

Both share the Size S0 frame and 45 mm width, so the mechanical footprint and DIN-rail mounting are identical. The main difference is the coil voltage — 3RT1023-1AL20 uses a 230 V AC coil, while this part uses 24 V DC. Verify the control transformer and wiring before swapping.

What compliance documentation does this brand provide for 3RT1023-3BB40-ZX95?

Siemens SIRIUS contactors are typically supplied with a declaration of conformity covering IEC/EN 60947-4-1, and RoHS/REACH compliance declarations are available on request. Specific UL/CSA file numbers should be verified against the nameplate marking.

MPN
3RT1023-3BB40-ZX95