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Siemens 3RT2045-3AP06 — Contactors

Siemens 3RT2045-3AP06 SIRIUS Power Contactor, 77 A at 480 V

MPN3RT2045-3AP06
Active

Siemens SIRIUS power contactor, Size S3, order code 3RT2045-3AP06, 77 A at 480 V, screw and snap-on 35 mm DIN rail mount, spring-type coil terminals.

Siemens 3RT2045-3AP06 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RT2045-3AP06 — Identification
ParameterValue
Contactor frame sizeS3
3RT2045-3AP06 — 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
3RT2045-3AP06 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.38
Rated value @ 50 Hz230 V
3RT2045-3AP06 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2045-3AP06 — 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)
3RT2045-3AP06 — 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
3RT2045-3AP06 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2045-3AP06 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2045-3AP06 — Mechanical
ParameterValue
Width80 mm
Height140 mm
Depth152 mm
3RT2045-3AP06 — Specifications
ParameterValue
At AC10 ... 21 ms

Product details

SIRIUS S3 power contactor — 77 A at 480 V, DIN-rail mount

Rated operational current at 230 V is 15 hp, and the contactor handles up to 1,000 switching cycles per hour in AC-3 duty (motor starting), 400 cycles/hr in AC-2 (slip-ring motor), and 300 cycles/hr in AC-4 (plugging/inching). The AC-1 resistive rating tops out at 900 cycles/hr. Main contacts are configured as 10 normally open and 2 normally closed, with an auxiliary switch built in.

Clearance and conductor sizing

The contactor occupies 80 mm width, 140 mm height, and 152 mm depth on the DIN rail. Main power terminals accept solid conductors from 2.5 to 16 mm² or stranded from 6 to 70 mm²; auxiliary terminals accept 2x (0.5 to 2.5 mm²) solid or stranded.

Auxiliary switch ratings: 6 A at 24 V, 2 A at 48 V, 2 A at 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, 3 A at 400 V, and 0.8 A at 440 V.

Frequently asked questions

How do I get current pricing and availability for 3RT2045-3AP06?

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

What is 3RT2045-3AP06's listed depth?

The depth is 152 mm.

What conductor sizes does 3RT2045-3AP06 accept?

Main terminals accept solid conductors from 2.5 to 16 mm² and stranded from 6 to 70 mm². Auxiliary terminals accept 2x (0.5 to 2.5 mm²) solid or stranded.

Will 3RT2045-3AP06 drop into a panel specified around 3RT5045-1AF00 without rewiring?

Both are Size S3 contactors from the SIRIUS family, sharing the same 80 mm width, 140 mm height, and 152 mm depth footprint, and both mount on 35 mm DIN rail. The 3RT5045-1AF00 is a 4-pole version with screw terminals; the 3RT2045-3AP06 has spring-type coil terminals and a 10 NO + 2 NC main contact configuration. Panel cutouts and DIN rail position are identical, but verify the auxiliary contact arrangement and terminal type against your wiring schedule.

MPN
3RT2045-3AP06