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Siemens 3RT2045-1AN24 — Contactors

Siemens 3RT2045-1AN24 SIRIUS Power Contactor, Size S3, 70 mm

MPN3RT2045-1AN24
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Siemens SIRIUS power contactor, size S3, order code 3RT2045-1AN24, screw-type terminals, auxiliary switch, 70 mm width, 140 mm height, 195 mm depth.

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

3RT2045-1AN24 — Identification
ParameterValue
Contactor frame sizeS3
3RT2045-1AN24 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V66 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V15 hp
Rated value @ 24 V6 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2045-1AN24 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.35
Rated value @ 50 Hz220 V
3RT2045-1AN24 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2045-1AN24 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 250 A (690 V, 100 kA), aM: 160 A (690 V, 100 kA), BS88: 200 A (415 V, 80 kA)
Short-circuit coordination type 2, fusegG: 160A (690V,100kA), aM: 80A (690V,100kA), BS88: 125A (415V,80kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT2045-1AN24 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid2.5 ... 16 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 standard mounting rail according to DIN EN 60715
Side-by-side mountingYes
3RT2045-1AN24 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2045-1AN24 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2045-1AN24 — Mechanical
ParameterValue
Width70 mm
Height140 mm
Depth195 mm
3RT2045-1AN24 — Specifications
ParameterValue
At AC10 ... 21 ms

Product details

It mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715, and the mounting position allows +/-180° rotation on a vertical surface plus forward/backward tilt of +/-22.5° — handy when you're squeezing it into a crowded enclosure and need to orient the coil terminals toward the gland plate. The contactor carries an auxiliary switch as standard. Main contacts are rated for 10 to 2 A. Coil termination is screw-type, accepting solid conductors from 2.5 to 16 mm² and stranded from 6 to 70 mm².

Switching duty and thermal limits

Maximum operating cycles per hour vary by duty: 900/h in AC-1 (resistive loads), 400/h in AC-2 (slip-ring motors), 1 000/h in AC-3 (squirrel-cage motors — the common one), and 300/h in AC-4 (plugging/inching). The AC-3e rating matches the AC-3 figure at 1 000/h. Arcing time sits between 10 and 20 ms, with a coil pick-up time in the same window (10–21 ms). That storage range is wider than the operating range — it's a handling spec, not a running spec, so don't let the part sit in a hot warehouse above 60 °C and expect it to start right up.

Physical footprint and clearances

Dimensions: 70 mm wide, 140 mm high, 195 mm deep.

Frequently asked questions

What are the key specifications of the 3RT2045-1AN24?

It's a SIRIUS size S3 power contactor with screw-type terminals, an auxiliary switch, 70 mm width, 140 mm height, 195 mm depth, DIN-rail snap-on mounting, AC-3 switching capacity up to 1 000 cycles per hour, and an operating temperature range of -25 to +60 °C.

What compliance documentation is available for the 3RT2045-1AN24?

As a Siemens SIRIUS product, it carries CE marking and is designed to meet IEC and EN standards for industrial control equipment. Specific RoHS, REACH, and UL documentation can be provided upon request at quote time.

MPN
3RT2045-1AN24