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Siemens 3RT1023-1BF40-ZX95 — Contactors

Siemens 3RT1023-1BF40-ZX95 SIRIUS Power Contactor, 110 V Coi

MPN3RT1023-1BF40-ZX95

Siemens SIRIUS 3RT1023-1BF40-ZX95 power contactor, size S0, 110 V DC magnet coil, screw-type terminals, IP20 front / IP00 terminal protection, 45 mm width, for 35 mm DIN rail.

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

3RT1023-1BF40-ZX95 — Identification
ParameterValue
Contactor frame sizeS0
3RT1023-1BF40-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
3RT1023-1BF40-ZX95 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1023-1BF40-ZX95 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1023-1BF40-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
3RT1023-1BF40-ZX95 — 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
3RT1023-1BF40-ZX95 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1023-1BF40-ZX95 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1023-1BF40-ZX95 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth101 mm

Product details

SIRIUS S0 power contactor for motor switching

The Siemens SIRIUS 3RT1023-1BF40-ZX95 is a size S0 power contactor with a 110 V DC magnet coil, built for switching motor loads in control panels up to 4 kW at 400 V in AC-3 duty. Rated for 4.5 kW at 500 V and 5.5 kW at 690 V, it covers a range of line voltages common in industrial supply systems.

Depth of 101 mm and height of 85 mm leave clearance for wiring duct and adjacent devices. Side-by-side mounting is permitted with 6 mm spacing at the side, which keeps the panel layout tight.

Main current circuit uses screw-type terminals accepting solid conductors 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²). Stranded conductors take 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), or max 2x 10 mm². AWG equivalents for main contacts: 2x (16 to 12), 2x (14 to 10), or 1x 8.

Magnet coil draws 5.4 W DC for both closing and holding, so the control transformer and wiring need to support that inrush without voltage sag. Coil operates on 110 V DC; auxiliary contact ratings for DC switching are 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V, and 6 A at 230 V.

Protection and coordination

Front protection is IP20 (finger-safe); terminal area is IP00 (requires enclosure protection).

Environmental limits

Frequently asked questions

What is the closest functional second-source to 3RT1023-1BF40-ZX95?

The 3RT1023-1AL20 is a functional peer in the same SIRIUS S0 frame, but verify coil voltage and terminal configuration against your BOM before substituting — the 1AL20 uses a different coil rating.

What compliance documentation does the SIRIUS brand provide for this contactor?

Standard Siemens SIRIUS documentation includes RoHS and REACH declarations; UL and IEC certifications are typically listed on the nameplate and in the technical data sheet.

Will 3RT1023-1BF40-ZX95 drop into a panel specified around 3RT1023-1AL20 without rewiring?

Both are S0 frame contactors with the same 45 mm width and DIN rail mounting, so the mechanical fit is identical. Terminal layout and screw-type termination are the same, but the coil voltage differs — the 1BF40 uses 110 V DC while the 1AL20 uses a different coil rating, so the control wiring must match.

What is the listed depth of 3RT1023-1BF40-ZX95?

The depth is 101 mm.

Where can I buy 3RT1023-1BF40-ZX95 and how is it quoted?

This part is sourced to order against an RFQ through independent distribution channels. Submit an RFQ for current pricing and availability — confirmed at quote time.

MPN
3RT1023-1BF40-ZX95