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Siemens 3RA1220-4CB26-0BB4 — Motor Starters

Siemens SIRIUS 3RA1220-4CB26-0BB4 reversing starter

MPN3RA1220-4CB26-0BB4

Siemens SIRIUS reversing starter, non-fused load feeder, S0 frame size, 11 kW at 400 V, bimetal overload, snap-on DIN rail.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

3RA1220-4CB26-0BB4 — Identification
ParameterValue
Product designationnon-fused load feeder
Main circuit poles3
BrandSIRIUS
Load feeder sizeS0
Product design / constructionreversing starter
Included contactor (type)3RT10 26-1BB40
Included circuit-breaker (type)3RV10 21-4CA10
Included link module (type)3RA19 21-1BA00
Reference designation (IEC 81346-2)Q
3RA1220-4CB26-0BB4 — Ratings & Performance
ParameterValue
Rated motor power at 400 V11 kW
Operational current Ie, AC-3 at 400 V22 A
Rated impulse withstand voltage (Uimp)6 kV
Mechanical service life, typ. (switching cycles)10 000 000
3RA1220-4CB26-0BB4 — Protection & Tripping
ParameterValue
Short-circuit protectionYes
Overload release setting range (current)17 ... 22 A
Duty / utilization type (IEC 60947-6-2)2
3RA1220-4CB26-0BB4 — Contacts & Control
ParameterValue
Control supply voltage typeDC
Auxiliary contacts, NO0
Auxiliary contacts, NC0
Auxiliary switch extensionYes
Switching contact typeelectromechanical
3RA1220-4CB26-0BB4 — Communication
ParameterValue
AS-Interface protocol supportNo
3RA1220-4CB26-0BB4 — Mechanical & Connection
ParameterValue
Main circuit connection typescrew-type terminals
Main contact conductor range (AWG)2x (14 ... 10)
Mounting / fastening methodsnap-on fastening on 35 mm standard rail
Mounting positionhorizontal
Width100 mm
Height220 mm
Depth125 mm
3RA1220-4CB26-0BB4 — Environmental
ParameterValue
Operating temperature range-20 ... +70 °C
Storage temperature range-55 ... +80 °C
Transport temperature range-20 ... +70 °C
Pollution degree3

Product details

The Siemens SIRIUS 3RA1220-4CB26-0BB4 is a non-fused reversing load feeder — a factory-assembled combination of a reversing contactor pair, a bimetal overload relay, and a circuit-breaker, all pre-wired and sized to S0 frame. The supplied circuit-breaker is a 3RV10 21-4CA10, and the supplied contactor is a 3RT10 26-1BB40; the bimetal overload provides motor protection against sustained overcurrent.

Mounting and wiring — panel fit

Snap-on fastening on 35 mm standard DIN rail, horizontal mounting position. Dimensions: 220 mm high, 100 mm wide, 125 mm deep. Clearance: 30 mm upwards, 10 mm forwards, 9 mm backwards, 0 mm downwards, 30 mm at the side. Wiring: solid or stranded 1 … 6 mm² for main contacts, with dual-wire capability for 2x (1 … 2.5 mm²) and 2x (2.5 … 6 mm²); AWG equivalents 2x (14 … 10).

Frequently asked questions

Is 3RA1220-4CB26-0BB4 obsolete?

Buyers need to know if the part is still in production or if they must find a replacement.

What is the replacement for 3RA1220-4CB26-0BB4?

Directly impacts BOM continuity; buyers need the exact successor part number.

Where can I buy 3RA1220-4CB26-0BB4?

Critical for sourcing; buyers need active distributors or surplus channels.

What are the specifications of 3RA1220-4CB26-0BB4?

Design engineers need to validate fit; includes current, voltage, and size.

Is 3RA2220-4CB27-0BB4 a direct replacement for 3RA1220-4CB26-0BB4?

Confirms drop-in compatibility to avoid redesign or re-wiring.

What is the price of 3RA1220-4CB26-0BB4?

Procurement needs pricing for budget and sourcing decisions.

MPN
3RA1220-4CB26-0BB4