Siemens 3RA2140-4KB46-0NB3 SIRIUS Motor Starter

Name: 3RA2140-4KB46-0NB3
Brand: Siemens
SKU: 3RA2140-4KB46-0NB3
Availability: LimitedAvailability
Author: Indirect Spend Ivan

Specifications

3RA2140-4KB46-0NB3 — Identification
Parameter	Value
Product designation	non-fused motor starter 3RA2
Main circuit poles	3
Brand	SIRIUS
Load feeder size	S3
Product design / construction	direct starter
Circuit-breaker size	S3
Included contactor (type)	3RT2140-460NB3
Included circuit-breaker (type)	3RV2041-4KA10
Included link module (type)	3RA2942-1AA00

3RA2140-4KB46-0NB3 — Ratings & Performance
Parameter	Value
Rated motor power at 400 V	37 kW
Operational current Ie, AC-3 at 400 V	75 A
Rated voltage at AC-3, max.	690 V
Rated motor power at 460/480 V (hp)	75 hp
Rated motor power at 575/600 V (hp)	75 hp
Rated current at 480 V	75 A
Rated current at 600 V	75 A
Rated operating frequency	50 ... 60 Hz
Rated impulse withstand voltage (Uimp)	6 kV
Rated insulation voltage Ui (AC, pollution degree 3)	690 V
Mechanical service life, typ. (switching cycles)	10 000 000

3RA2140-4KB46-0NB3 — Protection & Tripping
Parameter	Value
Trip class	CLASS 10
Short-circuit protection	Yes
Rated short-circuit current at 400 V (IEC 60947-4-1)	65 000 A
Overload release setting range (current)	57 ... 75 A
Overload release type	thermal (bimetallic)
Short-circuit trip type	magnetic
Duty / utilization type (IEC 60947-6-2)	2

3RA2140-4KB46-0NB3 — Contacts & Control
Parameter	Value
Rated value	20 ... 33 V
Rated voltage range at 50 Hz	20 ... 33 V
Auxiliary contacts, NO	1
Auxiliary contacts, NC	1
Auxiliary switch extension	Yes
Switching contact type	electromechanical

3RA2140-4KB46-0NB3 — Mechanical & Connection
Parameter	Value
Main circuit connection type	screw-type terminals
Main contact conductor range (AWG)	2x (10 ... 1/0), 1x (10 ... 2)
Mounting / fastening method	Snap-mounted to DIN rail or screw-mounted with additional push-in lug
Mounting position	vertical
Width	70 mm
Height	332 mm
Depth	200 mm

3RA2140-4KB46-0NB3 — Environmental
Parameter	Value
Operating temperature range	-20 ... +60 °C
Storage temperature range	-50 ... +80 °C
Transport temperature range	-55 ... +80 °C
Pollution degree	3
Shock resistance (IEC 60068-2-27)	6.7g / 5 ms

Product details

Motor ratings and trip class

The 3RA2140-4KB46-0NB3: At 400 V it delivers 37 kW.

Mounting and panel fit

Snap-mounts onto DIN rail or screws onto a backplate with the included push-in lug. Mounting position is vertical only. Dimensions are 332 mm high, 70 mm wide, 200 mm deep. Clearance: 50 mm above, 32 mm in front, 10 mm below, 10 mm at the sides, zero behind.

Supplied components and wiring

The starter ships with a 3RT2140-460NB3 contactor and a 3RA2942-1AA00 link module. The overload release is thermal bimetallic, electromechanical switching. Main contact wire range: stranded 10–70 mm², or two conductors 2.5–50 mm² each. Pollution degree 3, suitable for industrial environments with conductive dust or moisture.

Operating conditions and lifecycle

Rated for ambient operation -20 to +60 °C; storage -50 to +80 °C; transport -55 to +80 °C.

Frequently asked questions

What is the maximum motor power this starter handles at 480 V?

At 480 V it is rated 75 A, which corresponds to 75 hp. At 400 V it delivers 37 kW.

What clearance is needed around this starter in the panel?

Allow 50 mm above, 32 mm in front, 10 mm below, and 10 mm at the sides. Zero clearance behind the unit.