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Siemens 3RA1120-4AA25-0BB4 Motor Starter - Size S0

Siemens 3RA1120-4AA25-0BB4 load feeder, 18-25A, 24V DC coil, Size S0.

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ManufacturerSiemens

Part number3RA1120-4AA25-0BB4

Voltage 400V AC

Current 18-25A

Size S0

Coil Voltage 24V DC

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Fuseless direct-on-line starting Size S0 24V DC control voltage Screw terminals Type 1 coordination 50 kA short-circuit rating

Product description

The Siemens 3RA1120-4AA25-0BB4 is a fuseless load feeder for direct-on-line starting, rated for 400V AC and featuring a 24V DC coil. This Size S0 unit has an adjustable current range of 18-25A and includes screw terminals for mounting on a standard mounting rail. It is designed for Type of Coordination 1 with a short-circuit current capacity of 50 kA.

This load feeder is utilized in various industrial automation applications for reliable motor starting and protection. It is a common component in control panels for manufacturing equipment, pumps, and fans where precise motor control is required.

Stanlo Automation, a veteran-owned distributor of surplus industrial automation parts, offers the Siemens 3RA1120-4AA25-0BB4. We are committed to providing quality components to ensure the continuity and efficiency of your operations.

Technical specifications

Voltage	400V AC
Current	18-25A
Size	S0
Coil Voltage	24V DC
Coordination Type	1
Iq	50 kA
Mounting	Standard DIN rail

Common applications

Motor control

Industrial automation

Machine building

Control panels

Conveyor systems

Pump control

Compatible systems

Compatible with Siemens SIRIUS control components and accessories.

Also known as

SIRIUS 3RA1120-4AA25-0BB4 Siemens Motor Starter Size S0

Replaces / compatible with

This is a phased-out product. Successor information is not directly available for this specific variant, but refer to the 3RA2 series for current Siemens load feeders.

Technical note

Expert tip

This unit is designed for Type 1 coordination, requiring appropriate upstream fusing or circuit breaker protection for the motor and feeder.

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Frequently asked questions

What is the current range for the Siemens 3RA1120-4AA25-0BB4 load feeder?

The Siemens 3RA1120-4AA25-0BB4 is a Size S0 load feeder with an adjustable current range of 18-25A.