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Siemens 3RT2045-3NP30 — Contactors

Siemens 3RT2045-3NP30 SIRIUS Power Contactor, 175-280 V coil

MPN3RT2045-3NP30
Active

Siemens SIRIUS power contactor, Size S3, spring-type terminals, 175-280 V AC/DC coil, screw and snap-on mounting onto 35 mm DIN rail.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RT2045-3NP30 — Identification
ParameterValue
Contactor frame sizeS3
3RT2045-3NP30 — 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
3RT2045-3NP30 — Control & Coil
ParameterValue
Control supply voltage typeAC/DC
Rated value @ 50 Hz3.5 VA
Rated value @ 50 Hz175 ... 280 V
3RT2045-3NP30 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2045-3NP30 — 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)
3RT2045-3NP30 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionspring-loaded terminals
Conductor cross-section, solid2.5 ... 16 mm²
Conductor cross-section, solid or stranded2x (0.5 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Side-by-side mountingYes
3RT2045-3NP30 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2045-3NP30 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2045-3NP30 — Mechanical
ParameterValue
Width70 mm
Height140 mm
Depth152 mm
3RT2045-3NP30 — Specifications
ParameterValue
At AC38 ... 57 ms

Product details

The coil accepts 175-280 V AC/DC, with an inrush peak of 65 A and a holding draw of 3.5 VA at 50/60 Hz. Rated for 1 000 operating cycles per hour at AC-3 duty, it handles motor switching in control panels where the panel builder wants fast wiring without screw torque checks.

Dimensions are 70 mm wide, 140 mm high, 152 mm deep — that depth means the contactor projects 152 mm from the DIN rail, so check gland-plate clearance before laying out the backplane. Solid wire accepted: 2.5... 16 mm² for the main circuit, with stranded up to 70 mm² for larger feeds.

Frequently asked questions

What is the coil voltage range for 3RT2045-3NP30?

The coil accepts 175-280 V AC/DC, with an inrush peak of 65 A and a holding power of 3.5 VA at 50/60 Hz.

Where can I buy 3RT2045-3NP30?

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

Will 3RT2045-3NP30 drop into a panel specified around 3RT1264-6AP36-0KA1 without rewiring?

No — the 3RT2045-3NP30 uses a 175-280 V AC/DC coil, while the 3RT1264-6AP36-0KA1 uses a 24 V DC coil. The control voltage family is different, so a drop-in swap would require changing the control transformer or PLC output card.

MPN
3RT2045-3NP30