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Siemens 3RT1045-1AL20-ZW97 — Contactors

Siemens SIRIUS 3RT1045-1AL20-ZW97 Power Contactor, S3, 45 kW

MPN3RT1045-1AL20-ZW97

Siemens SIRIUS, power contactor, S3, 3RT1045-1AL20-ZW97, 45 kW at 500 V AC-3, screw terminals, 70 x 146 x 139 mm.

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

3RT1045-1AL20-ZW97 — Identification
ParameterValue
Contactor frame sizeS3
3RT1045-1AL20-ZW97 — 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
3RT1045-1AL20-ZW97 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz230 V
3RT1045-1AL20-ZW97 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1045-1AL20-ZW97 — 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
3RT1045-1AL20-ZW97 — 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
3RT1045-1AL20-ZW97 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1045-1AL20-ZW97 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1045-1AL20-ZW97 — Mechanical
ParameterValue
Width70 mm
Height146 mm
Depth139 mm
3RT1045-1AL20-ZW97 — Specifications
ParameterValue
At AC10 ... 25 ms

Product details

The 3RT1045-1AL20-ZW97: Snaps onto 35 mm or 75 mm DIN rail (screw and snap-on mounting) and measures 70 mm wide by 146 mm tall by 139 mm deep — the S3 footprint fits a standard panel grid; leave clearance for the arc chamber and terminal access. Main current circuit uses screw-type terminals; stranded cable from 10 to 50 mm², solid from 0.5 to 4 mm² (two per clamp).

Duty and endurance

Rated for 10 million mechanical cycles typical, with AC-3 switching rates up to 1000 operations per hour — enough for frequent-start applications like short-cycle conveyors or indexing tables.

Frequently asked questions

What is the closest functional second-source to 3RT1045-1AL20-ZW97?

The 3RT1044-1FB46 is a smaller S2 frame contactor in the same SIRIUS family; it shares the same screw-terminal and DIN-rail design but has lower motor ratings. The 3RT5045-1AF00 and 3RT5045-1AC20 are S3 frame contactors from the SIRIUS 3RT5 series with electronic coil interfaces. None is a drop-in without checking the coil voltage and auxiliary configuration.

Where can I buy 3RT1045-1AL20-ZW97?

Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time.

MPN
3RT1045-1AL20-ZW97