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Siemens 3RV2031-4JB15 Size S2 Class 20 Circuit Breaker w/ Aux

Siemens 3RV2031-4JB15 Size S2 Class 20 breaker w/ aux switches

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ManufacturerSiemens

Part number3RV2031-4JB15

Size S2

Rated operational current (Ie) 65 A

Adjustment range of overload releases 54...65 A

Actuation type THERMAL

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Motor protection Size S2 Class 20 Adjustable thermal release Integrated auxiliary switches (1 NO+1 NC) Screw terminals

Product description

The Siemens 3RV2031-4JB15 is a Size S2 motor protection circuit breaker that combines Class 20 overload protection with integrated transverse auxiliary switches (1 NO + 1 NC). It is designed for motors with higher starting currents, featuring an adjustable A-release from 54 to 65 A and an N-release of 845 A. This breaker utilizes screw terminals for secure connections and standard switching capacity.

This model is suitable for applications where both robust motor protection and signaling capabilities are required. It is commonly used in control panels for larger industrial machinery, pumps, and fans where status feedback or interlock functions are necessary, spanning various manufacturing and processing industries.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RV2031-4JB15, ensuring reliable performance for your automation needs. We provide tested and dependable components, backed by exceptional service.

Technical specifications

Size	S2
Rated operational current (Ie)	65 A
Adjustment range of overload releases	54...65 A
Actuation type	THERMAL
Trip class	CLASS 20
Number of poles	3
Auxiliary contacts	1 NO + 1 NC transverse
Voltage	400 V
Protection class	IP20

Common applications

Motor control

Signaling and interlocks

Large industrial machinery

Pumps

Fans

Control panels

Compatible systems

Industrial motor control systems requiring Class 20 protection and status signaling

Also known as

Siemens 3RV2 Class 20 breaker w/ aux S2 motor starter protector 3RV2031-4JB15 Siemens signaling circuit breaker

Replaces / compatible with

This Siemens 3RV2031-4JB15 is part of the 3RV2 series, offering Class 20 motor protection with auxiliary contacts for higher current applications. It serves as an integrated solution for protection and signaling.

Technical note

Expert tip

When installing auxiliary switches on the 3RV2031-4JB15, ensure they are correctly seated and latched to guarantee reliable electrical contact for signaling purposes.

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Frequently asked questions

How do the auxiliary switches on the 3RV2031-4JB15 facilitate control systems?

The 3RV2031-4JB15 includes one normally open (NO) and one normally closed (NC) auxiliary contact. These contacts can be wired to a PLC or control relay to signal the operational status of the motor (e.g., running, tripped) or to implement safety interlocks within the control system.