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Siemens 3RT2023-2FB40 — Contactors

Siemens 3RT2023-2FB40 SIRIUS S0 Power Contactor, 24 VDC Coil

MPN3RT2023-2FB40
Active

Siemens SIRIUS S0 power contactor, 3RT2023-2FB40, 24 VDC coil rated 10 A, spring-type terminals, screw and snap-on 35 mm DIN rail mounting.

Siemens 3RT2023-2FB40 datasheet (PDF)
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

3RT2023-2FB40 — Identification
ParameterValue
Contactor frame sizeS0
3RT2023-2FB40 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V8.5 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V1 hp
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2023-2FB40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2023-2FB40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2023-2FB40 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 63A (690V,100kA), aM: 32A (690V,100kA), BS88: 63A (415V,80kA)
Short-circuit coordination type 2, fusegG: 25A (690V,100kA), aM: 20A (690V,100kA), BS88: 25A (415V,80kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT2023-2FB40 — Connection & Mounting
ParameterValue
Main circuit connectionspring-loaded terminals
Aux. / control circuit connectionspring-loaded terminals
Conductor cross-section, solid1 ... 10 mm²
Conductor cross-section, solid or stranded2x (0.5 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715
Side-by-side mountingYes
3RT2023-2FB40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2023-2FB40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2023-2FB40 — Mechanical
ParameterValue
Width45 mm
Height102 mm
Depth107 mm

Product details

The Siemens SIRIUS 3RT2023-2FB40 is a size S0 power contactor with a 24 VDC coil rated at 10 A for AC-3 duty.

The S0 frame measures 45 mm wide, 102 mm tall, and 107 mm deep — a compact footprint that fits standard 45 mm wide DIN-rail slots. The spring-cage terminals accept 1–10 mm² solid or stranded wire; for dual-wire terminations use 2x (0.5–2.5 mm²). Strip length for the spring clamp is 8 mm.

Coil and Switching Performance

Coil rated 24 VDC, with a pickup threshold of 0.8 x rated value (19.2 VDC) and a dropout below that. Dropout time on DC is 15–18 ms; arcing time is 10 ms. Maximum switching frequency: 1,000 operations per hour for AC-1, AC-2, AC-3, and AC-3e duty; 300 ops/h for AC-4.

Frequently asked questions

What is the depth of 3RT2023-2FB40?

The depth is 107 mm.

What wire sizes does the spring terminal accept?

Solid or stranded conductors from 1 to 10 mm²; dual-wire terminations accept 2x (0.5–2.5 mm²).

Will 3RT2023-2FB40 drop into a panel specified for 3RT2015-1BW42?

Both are SIRIUS S0 contactors with the same 45 mm width and DIN-rail mounting, so the footprint and rail position are identical. The main difference is the coil voltage: 3RT2023-2FB40 uses 24 VDC, while 3RT2015-1BW42 uses a different coil. Verify coil supply before substitution.

How do I get current pricing and availability for 3RT2023-2FB40?

Submit an RFQ — we source through independent distribution and confirm current pricing and lead time at quote time.

MPN
3RT2023-2FB40