Skip to main content
Log in
Siemens 3RT2045-3XF44-0LA2 — Contactors

Siemens 3RT2045-3XF44-0LA2 SIRIUS Contactor, S3, 110 VDC Coi

MPN3RT2045-3XF44-0LA2
Active

Siemens SIRIUS, Size S3 contactor, 3RT2045-3XF44-0LA2, 110 VDC coil, spring-type terminals, 77 A at 480 V, 62 A at 600 V, screw and snap-on mounting for 35 mm DIN rail.

Siemens 3RT2045-3XF44-0LA2 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RT2045-3XF44-0LA2 — Identification
ParameterValue
Contactor frame sizeS3
3RT2045-3XF44-0LA2 — 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 V6 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2045-3XF44-0LA2 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2045-3XF44-0LA2 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
3RT2045-3XF44-0LA2 — 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)
3RT2045-3XF44-0LA2 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionspring-loaded terminals
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 standard mounting rail according to DIN EN 60715
Side-by-side mountingYes
3RT2045-3XF44-0LA2 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2045-3XF44-0LA2 — Environmental
ParameterValue
Operating temperature range-40 ... +70 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2045-3XF44-0LA2 — Mechanical
ParameterValue
Width70 mm
Height140 mm
Depth200 mm

Product details

SIRIUS S3 contactor, 110 VDC coil, spring-terminal

The coil draws a 1.5 A inrush peak and holds at the 110 VDC rated value.

Auxiliary contact switching capability

The integrated auxiliary switch is rated across DC voltage levels: 6 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. These ratings define the DC-13 switching curve for the auxiliary contacts — useful when interposing to a PLC input or pilot relay. The arcing time spans 10 to 20 ms; the DC operate time is 38 to 57 ms.

The contactor is rated for 10 million typical mechanical operations. The AC-4 maximum switching rate is 300 operations per hour.

Frequently asked questions

What are the main contact current ratings for 3RT2045-3XF44-0LA2?

The main contacts are rated 77 A at 480 V and 62 A at 600 V. These are the headline figures for motor and resistive load switching.

What coil voltage and termination type does this contactor use?

The magnet coil is rated 110 VDC and terminates via spring-type terminals. The coil draws a 1.5 A inrush peak.

Where can I buy 3RT2045-3XF44-0LA2 and how is it quoted?

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

MPN
3RT2045-3XF44-0LA2