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Siemens 3RT2544-1AF00 — Contactors

Siemens SIRIUS 3RT2544-1AF00 Contactor, Size S3, 70 mm, Scre

MPN3RT2544-1AF00
Active

Siemens SIRIUS, contactor, Size S3, 3RT2544-1AF00, 70 mm width, screw-type coil terminals, screw and snap-on mounting on 35 mm DIN rail.

Siemens 3RT2544-1AF00 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

3RT2544-1AF00 — Identification
ParameterValue
Contactor frame sizeS3
3RT2544-1AF00 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
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
3RT2544-1AF00 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.38
Rated value @ 50 Hz110 V
3RT2544-1AF00 — Contacts & Poles
ParameterValue
Main poles4
Main NO contacts2
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2544-1AF00 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 250 A (690 V, 100 kA)
Short-circuit coordination type 2, fusegR: 250 A (690 V, 100 kA)
Aux. switch short-circuit protection, fusefuse gG: 10 A
3RT2544-1AF00 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Conductor cross-section, solid or stranded2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Side-by-side mountingYes
3RT2544-1AF00 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2544-1AF00 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2544-1AF00 — Mechanical
ParameterValue
Width70 mm
Height140 mm
Depth152 mm
3RT2544-1AF00 — Specifications
ParameterValue
At AC11 ... 21 ms

Product details

The 3RT2544-1AF00 is a Size S3 SIRIUS contactor, 70 mm wide, 140 mm tall, 152 mm deep. Power terminals accept stranded wire: 2x (6…16 mm²), 2x (10…50 mm²), or 1x (10…70 mm²). Auxiliary/coil terminals use screw-type connections for 2x (0.5…1.5 mm²) solid or 2x (0.75…2.5 mm²) stranded. That covers most panel wiring up to 70 mm² on the line side.

Auxiliary contact ratings and duty

The built-in auxiliary switch is rated across common control voltages: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 1 A at 690 V. For DC control circuits, it handles 2 A at 48/60 V, 0.9 A at 125 V, and 0.1 A at 600 V. Maximum switching frequency in AC-1 duty is 900 cycles per hour.

Environmental limits

The coil operates at 50 Hz with a power factor of 0.38. Arcing time is 10…20 ms, and the total operate time (AC) is 11…21 ms.

Frequently asked questions

What is the closest functional second-source to 3RT2544-1AF00?

The 3RT2536-1AF00 is a smaller Size S2 frame in the same SIRIUS family. It will not drop into a panel wired for the S3 without rewiring — the terminal ratings and footprint differ.

Will 3RT2544-1AF00 drop into a panel specified around 3RT2536-1AF00?

No. The S3 frame is 70 mm wide vs the S2's narrower width, and the power terminal range goes up to 70 mm² — larger than the S2 accepts. Expect to re-terminate and possibly adjust DIN rail spacing.

Where can I buy 3RT2544-1AF00?

Sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

MPN
3RT2544-1AF00