Siemens 3RA2120-1HD24-0FB4 SIRIUS Direct Starter, S0

Name: 3RA2120-1HD24-0FB4
Brand: Siemens
SKU: 3RA2120-1HD24-0FB4
Availability: LimitedAvailability
Author: Plant Buyer Dottie

Specifications

Identification

3RA2120-1HD24-0FB4 — Identification
Parameter	Value
Product designation	Direct (on-line) starter
Main circuit poles	3
Brand	SIRIUS
Load feeder size	S0
Product design / construction	for 60 mm busbars
Circuit-breaker size	S00
Included contactor (type)	3RT2024-1FB40
Included circuit-breaker (type)	3RV2011-1HA10
Included link module (type)	3RA2921-1BA00

Ratings & Performance

3RA2120-1HD24-0FB4 — Ratings & Performance
Parameter	Value
Rated motor power at 400 V	3 000 W
Operational current Ie, AC-3 at 400 V	6.5 A
Rated voltage at AC-3, max.	690 V
Rated motor power at 460/480 V (hp)	5 hp
Rated motor power at 575/600 V (hp)	5 hp
Rated current at 480 V	8 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

Protection & Tripping

3RA2120-1HD24-0FB4 — Protection & Tripping
Parameter	Value
Trip class	CLASS 10
Short-circuit protection	Yes
Rated short-circuit current at 400 V (IEC 60947-4-1)	150 000 A
Overload release setting range (current)	5.5 ... 8 A
Overload release type	thermal (bimetallic)
Short-circuit trip type	magnetic
Duty / utilization type (IEC 60947-6-2)	2

Contacts & Control

3RA2120-1HD24-0FB4 — Contacts & Control
Parameter	Value
Rated value	24 ... 24 V
Control supply voltage type	DC
Auxiliary switch extension	Yes
Switching contact type	electromechanical

Communication

3RA2120-1HD24-0FB4 — Communication
Parameter	Value
AS-Interface protocol support	No

Mechanical & Connection

3RA2120-1HD24-0FB4 — Mechanical & Connection
Parameter	Value
Mounting / fastening method	for snapping onto 60 mm busbar systems
Mounting position	vertical
Width	45 mm
Height	260 mm
Depth	165 mm

Environmental

3RA2120-1HD24-0FB4 — Environmental
Parameter	Value
Operating temperature range	-20 ... +60 °C
Storage temperature range	-50 ... +80 °C
Transport temperature range	-50 ... +80 °C
Shock resistance (IEC 60068-2-27)	6g / 11 ms

Product details

S0 direct starter, busbar-snap mounting

The 3RA2120-1HD24-0FB4 is a Siemens SIRIUS direct-on-line starter, size S0, assembled as a single unit for snapping onto 60 mm busbar systems. It combines a 3RT2024-1FB40 contactor, a 3RV2011-1HA10 circuit-breaker (size S00), and a thermal bimetallic overload relay in one package.

Dimensions and panel fit

Mounting is vertical only, with 50 mm clearance required above and 20 mm in front for wiring access. The supplied busbar adapter (8US1251-5NT10) and link module (3RA2921-1BA00) are included in the assembly, so the unit arrives ready to snap onto the 60 mm system and wire up.

Frequently asked questions

What is the 3RA2120-1HD24-0FB4 rated for at 400 V?

At 480 V the rated current is 8 A.

What components are supplied with this starter?

The assembly includes a 3RT2024-1FB40 contactor, a 3RV2011-1HA10 circuit-breaker (size S00), a thermal overload relay, a 3RA2921-1BA00 link module, and a 8US1251-5NT10 busbar adapter.