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Siemens 3RT2646-1AB03 — Contactors

Siemens 3RT2646-1AB03 SIRIUS Capacitor Contactor, S3, 24 V A

MPN3RT2646-1AB03
Active

Siemens SIRIUS capacitor contactor, S3 frame, 24 V AC coil, screw-type terminals, 80 mm width, 140 mm height, 152 mm depth, screw and snap-on mounting onto 35 mm DIN rail.

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

3RT2646-1AB03 — Identification
ParameterValue
Contactor frame sizeS3
3RT2646-1AB03 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz24 V
3RT2646-1AB03 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability0.00000001
3RT2646-1AB03 — Protection & Coordination
ParameterValue
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT2646-1AB03 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²
Conductor cross-section, solid or stranded2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 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 50022
3RT2646-1AB03 — Durability
ParameterValue
Durability with aux. switch block (cycles, typ.)3 000 000
3RT2646-1AB03 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2646-1AB03 — Mechanical
ParameterValue
Width80 mm
Height140 mm
Depth152 mm
3RT2646-1AB03 — Specifications
ParameterValue
At AC10 ... 21 ms

Product details

It mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 50022, and the mounting position allows ±180° rotation on a vertical surface plus ±22.5° tilt forward or backward — useful when panel layout forces an unconventional orientation.

The contactor is rated to switch 6 A at 24 V AC and 6 A at 230 V AC, with a maximum operating rate of 150 switching cycles per hour at 230 V. At 400 V AC it handles 3 A at up to 80 cycles per hour. The arcing time falls between 10 and 20 ms — typical for this class of capacitor switching, where the inrush from discharged caps can be several times the steady-state rating. The solid conductor capacity goes up to 4 mm² on the auxiliary side and 70 mm² stranded on the main power terminals, so it accepts the cable sizes common in power factor correction sub-panels.

Frequently asked questions

What is the closest functional second-source to 3RT2646-1AB03?

The 3RT2036-1AC20-ZX95 is a peer SIRIUS contactor but uses a 24 V AC coil in a different frame size (S2 vs S3). The physical footprint and terminal capacity differ — the S3 frame (80 x 140 x 152 mm) is larger than the S2, so a direct drop-in without rewiring is not guaranteed. Verify the panel cutout and wire gauge before substituting.

Where can I buy 3RT2646-1AB03 and get current pricing?

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 for this exact order code.

What wire sizes does 3RT2646-1AB03 accept?

Solid conductors: 2x (0.5...1.5 mm²), 2x (0.75...2.5 mm²), 2x 4 mm². Stranded: 2x (10...70 mm²) or 1x (10...70 mm²).

MPN
3RT2646-1AB03