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Siemens 3RT2045-1XF40-0LA2 — Contactors

Siemens 3RT2045-1XF40-0LA2 SIRIUS Contactor, 110 VDC Coil, S

MPN3RT2045-1XF40-0LA2
Active

Siemens SIRIUS 3RT2045-1XF40-0LA2, Size S3 contactor, 110 VDC coil with screw-type terminals, 77 A at 480 V, 62 A at 600 V, screw and snap-on mounting for 35 mm DIN rail.

Siemens 3RT2045-1XF40-0LA2 datasheet (PDF)
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

3RT2045-1XF40-0LA2 — Identification
ParameterValue
Contactor frame sizeS3
3RT2045-1XF40-0LA2 — 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 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2045-1XF40-0LA2 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2045-1XF40-0LA2 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
3RT2045-1XF40-0LA2 — 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)
3RT2045-1XF40-0LA2 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
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 standard mounting rail according to DIN EN 60715
Side-by-side mountingYes
3RT2045-1XF40-0LA2 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2045-1XF40-0LA2 — Environmental
ParameterValue
Operating temperature range-40 ... +70 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2045-1XF40-0LA2 — Mechanical
ParameterValue
Width70 mm
Height140 mm
Depth152 mm

Product details

Siemens SIRIUS 3RT2045-1XF40-0LA2 — Size S3 Contactor with 110 VDC Coil

It carries a 110 VDC coil with screw-type terminals, rated for continuous duty. Main contact ratings reach 77 A at 480 V and 62 A at 600 V, making it suitable for medium-horsepower motor circuits in North American and IEC installations. Dimensions are 140 mm height, 70 mm width, and 152 mm depth — the depth is the key dimension to check for enclosure depth clearance, especially when paired with overload relays or auxiliary contact blocks that add to the stack.

Coil & Auxiliary Details

The coil is 110 VDC, with a pickup threshold starting at 70% of rated voltage and an inrush peak of 1.5 A. It includes an auxiliary switch as standard, which can be used for status feedback or interlocking in safety circuits.

Integration & Panel Fit

The contactor accepts 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded wire at the main terminals.

Frequently asked questions

Where can I buy 3RT2045-1XF40-0LA2 and how do I get a price?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ to get a firm price and lead time.

What are the key ratings of 3RT2045-1XF40-0LA2?

It is a Size S3 contactor with a 110 VDC coil, rated 77 A at 480 V and 62 A at 600 V. Dimensions are 140 mm height, 70 mm width, 152 mm depth. Mounting is screw or snap-on onto 35 mm DIN rail.

What is the depth of 3RT2045-1XF40-0LA2?

The depth is 152 mm. This is the dimension to check for enclosure clearance, especially when adding auxiliary contact blocks or overload relays behind the contactor.

Will 3RT2045-1XF40-0LA2 drop into a panel specified around 3RT1054-2AP36?

Both are Size S3 contactors from the Siemens SIRIUS family, so they share the same mounting footprint on 35 mm DIN rail and similar terminal spacing. However, the 3RT1054-2AP36 has a different coil voltage and auxiliary configuration — verify the coil voltage and auxiliary contact arrangement before swapping.

MPN
3RT2045-1XF40-0LA2