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Siemens 3RA2120-1JA24-0BB4 Direct-On-Line Motor Starter

Siemens 3RA2120-1JA24-0BB4 Direct-On-Line Starter

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ManufacturerSiemens

Part number3RA2120-1JA24-0BB4

Type Load Feeder, Direct-On-Line

Manufacturer Siemens

Series SIRIUS 3RA21

Size S0

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CAGE: 9NK75

Fuseless Direct-On-Line Starting Size S0 24 V DC Coil Type of Coordination 2 Screw Terminal 1 NO + 1 NC Auxiliary Contacts Standard Mounting Rail

Product description

The Siemens 3RA2120-1JA24-0BB4 is a fuseless direct-on-line load feeder from the SIRIUS 3RA21 series. It is rated for Size S0, with a current range of 7.00 to 10.0 A and a 24 V DC coil. This starter is designed for installation on standard mounting rails and provides Type of Coordination 2 protection, along with a breaking capacity of 150 kA.

This starter is widely used in industrial automation for starting and protecting electric motors in applications such as conveyor systems, pump controls, and general machinery. Its robust design and Type 2 coordination ensure reliable operation and safety for both equipment and personnel.

Source the Siemens 3RA2120-1JA24-0BB4 from Stanlo Automation. As a veteran-owned surplus parts supplier, we offer a cost-effective solution for acquiring quality industrial automation components, backed by excellent customer service.

Technical specifications

Type	Load Feeder, Direct-On-Line
Manufacturer	Siemens
Series	SIRIUS 3RA21
Size	S0
Current Range	7.00-10.0 A
Coil Voltage	24 V DC
Mounting	Standard Mounting Rail
Coordination Type	1 & 2
Breaking Capacity (Iq)	150 kA
Auxiliary Contacts	1 NO + 1 NC

Common applications

Conveyor Systems

Pump Controls

Industrial Machinery

Motor Control Centers

Automation Systems

Manufacturing Equipment

Compatible systems

Siemens LOGO! Siemens S7-1200 Siemens S7-1500 General industrial control panels

Also known as

Siemens 3RA2120 Starter Siemens S0 DOL Starter 3RA2120 Motor Feeder

Replaces / compatible with

This Siemens 3RA2120-1JA24-0BB4 starter is suitable for replacing existing Siemens SIRIUS 3RA21 starters or other compatible direct-on-line starters in the 7-10A range. It offers advanced protection features.

Technical note

Expert tip

The 1 NO + 1 NC auxiliary contacts can be utilized for signaling purposes, such as indicating starter status or fault conditions to a PLC.

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Frequently asked questions

What is the breaking capacity of the Siemens 3RA2120-1JA24-0BB4?

The Siemens 3RA2120-1JA24-0BB4 has a breaking capacity (Iq) of 150 kA. This high breaking capacity ensures it can safely interrupt fault currents, protecting the motor and electrical system from damage during short-circuit events.