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Siemens 3RT1045-1AR64 — Contactors

Siemens 3RT1045-1AR64 SIRIUS Power Contactor, 45 kW at 500 V

MPN3RT1045-1AR64

Siemens SIRIUS 3RT1045-1AR64 power contactor, Size S3, 45 kW at 500 V, 21.1 kW at 690 V, screw terminals, IP20 front, current production.

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

3RT1045-1AR64 — Identification
ParameterValue
Contactor frame sizeS3
3RT1045-1AR64 — 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 V45 kW
Rated value @ 690 V21.1 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
3RT1045-1AR64 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz400 V
3RT1045-1AR64 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1045-1AR64 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 250 A
Short-circuit coordination type 2, fusefuse gL/gG: 160 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT1045-1AR64 — 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), max. 2x (0.75 ... 4 mm²)
Conductor cross-section, solid or stranded2x (2.5 ... 16 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 and 75 mm standard mounting rail
Side-by-side mountingYes
3RT1045-1AR64 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1045-1AR64 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1045-1AR64 — Mechanical
ParameterValue
Width70 mm
Height146 mm
Depth188 mm
3RT1045-1AR64 — Specifications
ParameterValue
At AC10 ... 25 ms

Product details

It mounts on 35 mm or 75 mm DIN rail via screw and snap-on fastening, so it integrates into standard enclosure layouts without special brackets. Rated for 45 kW at 500 V and 21.1 kW at 690 V, it handles the motor power range typical of medium-duty conveyors, pumps, and compressors. The coil accepts 400 V at 50 Hz or 400–440 V at 60 Hz. Mechanical life is rated at 10,000,000 operations typical, and maximum switching frequency reaches 1,000 1/h under AC-3 duty. That means it can cycle a motor start every 3.6 seconds continuously — realistic for high-throughput packaging or material-handling lines.

Solid conductors accept 2x (0.5–1.5 mm²), 2x (0.75–2.5 mm²), or max 2x (0.75–4 mm²); stranded conductors accept 2x (10–50 mm²). That covers both control wiring and power tails without adapter lugs. Side-by-side mounting is permitted, which helps when packing multiple contactors into a tight row on the DIN rail.

Dimensions: 146 mm height, 70 mm width, 188 mm depth. Arcing time at AC is 10–25 ms. Rated switching frequencies: AC-1 max 900 1/h, AC-2 max 400 1/h, AC-3 max 1,000 1/h, AC-4 max 300 1/h (–).

Frequently asked questions

Where can I buy 3RT1045-1AR64 and how is it quoted?

It is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

What is the depth of 3RT1045-1AR64?

The depth is 188 mm.

What solid conductor sizes does 3RT1045-1AR64 accept?

It accepts 2x (0.5–1.5 mm²), 2x (0.75–2.5 mm²), and max 2x (0.75–4 mm²) solid conductors.

Will 3RT1045-1AR64 drop into a panel specified around 3RT1044-1FB46 without rewiring?

The 3RT1045-1AR64 is a Size S3 frame, while the 3RT1044-1FB46 is a different size; verify footprint and terminal layout against your existing panel before substitution.

MPN
3RT1045-1AR64