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Siemens 3RT2027-2BB40-ZX95 — Contactors

Siemens 3RT2027-2BB40-ZX95 SIRIUS Power Contactor, 24 VDC Co

MPN3RT2027-2BB40-ZX95
Active

Siemens SIRIUS power contactor, size S0, 24 V DC coil, spring-type terminals, 45 mm width, 107 mm depth, auxiliary switch included.

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

3RT2027-2BB40-ZX95 — Identification
ParameterValue
Contactor frame sizeS0
3RT2027-2BB40-ZX95 — 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
3RT2027-2BB40-ZX95 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2027-2BB40-ZX95 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2027-2BB40-ZX95 — 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)
3RT2027-2BB40-ZX95 — Connection & Mounting
ParameterValue
Main circuit connectionspring-loaded terminals
Aux. / control circuit connectionspring-loaded terminals
Conductor cross-section, solid1 ... 10 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 standard mounting rail according to DIN EN 60715
Side-by-side mountingYes
3RT2027-2BB40-ZX95 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2027-2BB40-ZX95 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2027-2BB40-ZX95 — Mechanical
ParameterValue
Width45 mm
Height102 mm
Depth107 mm

Product details

It carries a 24 V DC coil with spring-type terminals — no screwdriver needed for the coil connection, which saves a few seconds per wire on a build-out. The contactor snaps onto 35 mm DIN rail per EN 60715 and can also be screw-mounted; the mounting position allows ±180° rotation on a vertical surface plus ±22.5° tilt forward and back, so it fits tight enclosures without forcing the bus. Rated operating current for the main contacts isn't listed directly, but the switching frequency tells the duty story: 1000 operations per hour at AC-1 (resistive), 750 at AC-2 and AC-3 (motor start/run), and 250 at AC-4 (plugging/inching). That AC-3 ceiling of 750 ops/h is typical for a general-purpose motor contactor — enough for a conveyor or pump cycling every few seconds, but not for a high-speed pick-and-place.

Terminal and wiring detail — spring-cage on the coil, screw on the main

Coil connection uses spring-type terminals. Auxiliary switch terminals accept 2x 0.5 to 2.5 mm². In a packed panel, that means you can butt this contactor against the next device or the gland plate as long as you respect the 6 mm side gap.

Coil and auxiliary contact ratings

Coil picks up at 0.8 x rated voltage and drops out at 1.1 x rated. Drop-out time on DC is 15 to 17.5 ms; arcing time is 10 ms. The integrated auxiliary switch is rated for 10 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, and 3 A at 400 V. It also carries a 5 hp rating at 230 V. That covers most PLC input and pilot-duty loads without needing a separate auxiliary block.

This part is current production.

Frequently asked questions

What is the depth of 3RT2027-2BB40-ZX95?

The depth is 107 mm.

What wire sizes does the main contact accept?

Solid or stranded wire from 1 to 10 mm².

Will 3RT2027-2BB40-ZX95 drop into a panel specified for 3RT2015-1BW42?

Both are SIRIUS contactors, but the frame size and terminal type differ. The 3RT2027-2BB40-ZX95 is an S0 frame with spring-type coil terminals; the 3RT2015-1BW42 is a different size. Verify physical fit and terminal compatibility before substituting.

What compliance documentation is available for this contactor?

As a Siemens SIRIUS product, it carries the usual industrial certifications (UL, CSA, CE, IEC) per the standard SIRIUS documentation package. Specific certificates are available on request.

MPN
3RT2027-2BB40-ZX95