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Siemens 3RT1045-1XP00-0GA0 — Contactors

Siemens 3RT1045-1XP00-0GA0 SIRIUS Power Contactor, Size S3,

MPN3RT1045-1XP00-0GA0

Siemens SIRIUS 3RT1045-1XP00-0GA0, Size S3 power contactor, 45 kW at 500 V AC-3, screw terminals, IP20 front, DIN-rail mount.

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

3RT1045-1XP00-0GA0 — Identification
ParameterValue
Contactor frame sizeS3
3RT1045-1XP00-0GA0 — 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
3RT1045-1XP00-0GA0 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz230 V
3RT1045-1XP00-0GA0 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1045-1XP00-0GA0 — 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
3RT1045-1XP00-0GA0 — 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
3RT1045-1XP00-0GA0 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1045-1XP00-0GA0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1045-1XP00-0GA0 — Mechanical
ParameterValue
Width70 mm
Height176 mm
Depth152 mm
3RT1045-1XP00-0GA0 — Specifications
ParameterValue
At AC10.6g / 5 ms, 6.2g / 10 ms

Product details

For heavier feeds, the solid-or-stranded range covers 2.5 to 16 mm². The front carries IP20 protection (finger-safe with the cover or box terminal), but the terminal body itself is IP00, meaning the wiring area is open and needs enclosure-level protection.

Electrical ratings and operating conditions

Rated for 50/60 Hz supply. Mechanical life is typical 10 million operations; switching frequency varies by duty: AC-3 maxes at 1 000 cycles per hour, AC-1 at 900, AC-2 at 400, and AC-4 at 300. The auxiliary contact ratings at various voltages (10 A at 24 V, 6 A at 230 V, 3 A at 400 V) give you the curve for control-circuit loads like PLC inputs or indicator lamps.

Frequently asked questions

What are the key motor ratings for this contactor?

In AC-3 duty (squirrel-cage motor starting/running), it is rated 45 kW at 500 V and 21.1 kW at 690 V. In AC-2 duty at 400 V it is rated 37 kW. These are the ratings to use when sizing the contactor for motor loads.

What mounting options does this contactor support?

It mounts via screw and snap-on onto 35 mm and 75 mm standard mounting rails. Side-by-side mounting is permitted, so multiple contactors can be ganged without spacing.

What is the protection rating of the contactor?

The front of the contactor is rated IP20 with the cover or box terminal installed, providing finger-safe protection. The terminal body itself is IP00, so the wiring area is open and requires enclosure-level protection.

MPN
3RT1045-1XP00-0GA0