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Siemens 3RT2045-1NF30 — Contactors

Siemens 3RT2045-1NF30 SIRIUS Power Contactor, S3 Size, 24V C

MPN3RT2045-1NF30
Active

Siemens SIRIUS 3RT2045-1NF30 power contactor, S3 size, screw-type coil terminals, 24 VDC rated 10 A, screw and snap-on 35 mm DIN rail mounting.

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

3RT2045-1NF30 — Identification
ParameterValue
Contactor frame sizeS3
3RT2045-1NF30 — 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 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2045-1NF30 — Control & Coil
ParameterValue
Control supply voltage typeAC/DC
Rated value @ 50 Hz3.5 VA
Rated value @ 50 Hz83 ... 155 V
3RT2045-1NF30 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2045-1NF30 — 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)
3RT2045-1NF30 — 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 DIN rail according to DIN EN 60715
Side-by-side mountingYes
3RT2045-1NF30 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2045-1NF30 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2045-1NF30 — Mechanical
ParameterValue
Width70 mm
Height140 mm
Depth152 mm
3RT2045-1NF30 — Specifications
ParameterValue
At AC38 ... 57 ms

Product details

The coil terminals are screw-type, accepting the listed conductor cross-sections. The contactor is rated for a 24 V coil with a pull-in current peak of 1.5 A and a holding power of 3.5 VA at both 50 and 60 Hz. The rated coil voltage range is 83 to 155 V, with a pickup threshold of 0.8 times the rated value and a dropout of 1.1 times the full-scale value. That means it holds in reliably down to about 66 V and drops out cleanly above 170 V — important for brownout ride-through on a line. For auxiliary switching, the contactor includes an integrated auxiliary switch rated at 24 V / 10 A, 48 V / 2 A, 60 V / 2 A, and 110 V / 1 A.

The contactor occupies a 70 mm width, 140 mm height, and 152 mm depth footprint. Main contact wiring accepts solid conductors from 2.5 to 16 mm² or stranded from 6 to 70 mm². Auxiliary and coil wiring accepts 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded.

Frequently asked questions

Where can I buy 3RT2045-1NF30?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock or lead-time number is published here.

What is the closest functional second-source for 3RT2045-1NF30?

The peer 3RT1055-6QF35 is a functionally similar SIRIUS power contactor but in a larger frame size with different coil voltage and terminal arrangement. It will not drop into a panel wired for the 3RT2045-1NF30 without rewiring — verify the mounting footprint and coil supply before substituting.

What are the key ratings for 3RT2045-1NF30?

The contactor is S3 size with a 24 VDC coil rated 10 A, screw-type terminals, and an integrated auxiliary switch. Mechanical life is 10 million operations typical. Operating temperature range is -25 to +60 °C.

MPN
3RT2045-1NF30