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Siemens 3RA2120-4CA27-0BB4 Motor Starter, Size S0

Siemens 3RA2120-4CA27-0BB4 Motor Starter

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ManufacturerSiemens

Part number3RA2120-4CA27-0BB4

Type Load Feeder, Direct-On-Line

Manufacturer Siemens

Series SIRIUS 3RA21

Size S0

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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 3RA2120-4CA27-0BB4 is a fuseless direct-on-line load feeder from the SIRIUS 3RA21 series, designed for starting and protecting motors. It features a Size S0 rating, a current range of 16 to 22 A, and a 24 V DC coil. This unit is designed for installation on standard mounting rails and provides Type of Coordination 2.

This motor starter is employed in various industrial automation applications, including motor control for machinery, conveyor systems, and processing equipment. Its Type 2 coordination ensures reliable protection for both the starter and the motor, contributing to system safety and uptime.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RA2120-4CA27-0BB4. We provide a dependable and cost-effective source for industrial automation components, helping you maintain your operations without unnecessary expense.

Technical specifications

Type	Load Feeder, Direct-On-Line
Manufacturer	Siemens
Series	SIRIUS 3RA21
Size	S0
Current Range	16-22 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

Industrial Machinery

Conveyor Systems

Processing Equipment

Motor Control Centers

Automation Systems

Manufacturing

Compatible systems

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

Also known as

Siemens 3RA2120 Starter Siemens S0 Starter 16-22A 3RA2120 DOL Feeder

Replaces / compatible with

This Siemens 3RA2120-4CA27-0BB4 starter is a suitable replacement for older Siemens SIRIUS 3RA21 series starters or comparable DOL starters within the 16-22A range, offering Type 2 coordination.

Technical note

Expert tip

Ensure the control voltage circuit for the 24 V DC coil is properly fused and protected to prevent damage to the coil.

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Frequently asked questions

What is the purpose of Type 2 Coordination in the Siemens 3RA2120-4CA27-0BB4?

Type 2 Coordination in the Siemens 3RA2120-4CA27-0BB4 ensures that in the event of a short circuit, the starter will not be damaged and will safely interrupt the circuit. This provides a higher level of protection for both the motor and the electrical system compared to Type 1 coordination.