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Siemens 3RT2027-1BB40-0CC0 — Contactors

Siemens 3RT2027-1BB40-0CC0 SIRIUS Power Contactor, 24 VDC Co

MPN3RT2027-1BB40-0CC0
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Siemens SIRIUS 3RT2027-1BB40-0CC0, Size S0 power contactor, 24 VDC coil, screw-type terminals, 5 hp at 230 V, 45 mm wide.

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

3RT2027-1BB40-0CC0 — Identification
ParameterValue
Contactor frame sizeS0
3RT2027-1BB40-0CC0 — 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
3RT2027-1BB40-0CC0 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2027-1BB40-0CC0 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2027-1BB40-0CC0 — 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)
3RT2027-1BB40-0CC0 — 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 DIN rail according to DIN EN 60715
Side-by-side mountingYes
3RT2027-1BB40-0CC0 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2027-1BB40-0CC0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2027-1BB40-0CC0 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth107 mm

Product details

The contactor is rated for motor duty up to 5 hp at 230 V, and its auxiliary contact block handles 10 A at 24 V, stepping down to 0.3 A at 220 V.

The 24 VDC coil is a common control voltage in modern PLC-driven panels — it keeps the control circuit isolated from the line voltage and is standard across most automation architectures. Switching frequency varies by duty class: up to 1,000 operations per hour for AC-1 resistive loads, 750 ops/h for AC-2 and AC-3 motor starting, and 250 ops/h for AC-4 plugging/reversing. For a conveyor line running at 750 cycles per hour under AC-3 duty, this contactor keeps up without derating. For fine-stranded wire, it handles 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) — useful when paralleling control wiring through the same terminal.

If your panel sits near a furnace line or in an unventilated cabinet in a hot climate, the upper operating limit of 60 °C is the hard ceiling — derate switching frequency if ambient exceeds 40 °C.

Frequently asked questions

What are the key dimensions for panel planning?

The contactor measures 45 mm wide, 85 mm tall, and 107 mm deep. It requires 10 mm clearance upwards, downwards, and forwards, and 6 mm at the side.

What wire sizes does the screw terminal accept?

Main contacts accept solid or stranded wire from 1 to 10 mm². For fine-stranded wire, it handles 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²).

What motor rating does this contactor support?

It is rated for 5 hp at 230 V for motor duty. The switching frequency under AC-3 duty is up to 750 operations per hour.

MPN
3RT2027-1BB40-0CC0