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Siemens 3RT2027-1AT60 — Contactors

Siemens 3RT2027-1AT60 SIRIUS Power Contactor, S0, 480V 27A A

MPN3RT2027-1AT60

Siemens SIRIUS, power contactor, 3RT2027-1AT60, size S0, 27 A at 480 V AC-3, screw-type terminals, DIN-rail mount.

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

3RT2027-1AT60 — Identification
ParameterValue
Contactor frame sizeS0
3RT2027-1AT60 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V22 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V5 hp
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2027-1AT60 — Control & Coil
ParameterValue
Control supply voltage typeAC
3RT2027-1AT60 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2027-1AT60 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 125A (690V,100kA), aM: 50A (690V,100kA), BS88: 125A (415V,80kA)
Short-circuit coordination type 2, fusegG: 50A (690V,100kA), aM: 25A (690V, 100kA), BS88: 50A (415V, 80kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT2027-1AT60 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid1 ... 10 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 standard mounting rail according to DIN EN 60715
Side-by-side mountingYes
3RT2027-1AT60 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2027-1AT60 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2027-1AT60 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth97 mm
3RT2027-1AT60 — Specifications
ParameterValue
At AC4 ... 16 ms

Product details

Its headline rating is 27 A at 480 V AC-3 duty — that's the current it can make and break under full motor starting conditions, not just continuous carry. For a 480 V three-phase motor, that covers roughly a 15–20 hp range depending on service factor. The coil termination is screw-type, and the main power terminals accept solid or stranded conductors from 1 to 10 mm², with double-wire capability for daisy-chaining control wiring (2x 0.5–1.5 mm² or 2x 0.75–2.5 mm²). Mounts via screw or snap-on to a 35 mm DIN rail per EN 60715, with +/-180° rotation on vertical surfaces and +/-22.5° tilt allowance — useful when panel layout forces an unconventional orientation.

Mechanical and thermal limits

That depth figure matters when you're laying out a 200 mm deep enclosure — you'll have just over 100 mm of wiring space behind the contactor. Maximum switching frequency varies by duty: 1000 cycles/hour for AC-1 (resistive loads), 750 cycles/hour for AC-2 and AC-3 (motor starting and running), and 250 cycles/hour for AC-4 (plugging and inching). If your application cycles faster than that, you'll need to oversize or add a power resistor to limit thermal buildup.

Frequently asked questions

What is the 3RT2027-1AT60's motor rating at 480 V?

It is rated 27 A at 480 V AC-3 duty, which is the full motor starting and running current it can handle.

What are the mounting dimensions and clearance requirements for 3RT2027-1AT60?

The contactor is 45 mm wide, 85 mm tall, 97 mm deep. It requires 10 mm clearance upwards, downwards, and forwards, and 6 mm to the side.

Where can I buy the 3RT2027-1AT60 and what is the lead time?

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

What wire gauges does the 3RT2027-1AT60 accept?

Main terminals accept solid or stranded 1–10 mm². Auxiliary/control terminals accept 2x 0.5–1.5 mm² or 2x 0.75–2.5 mm².

MPN
3RT2027-1AT60