Home › Manufacturers › Siemens › 3RV1042-4KB10

Siemens

Siemens 3RV1042-4KB10 S3 Motor Protection Circuit Breaker

● In Stock 12-Mo Warranty Same-Day Dispatch Ships Worldwide 🎖 Veteran-Owned

In Stock — Ready to Ship

ManufacturerSiemens

Part number3RV1042-4KB10

Size S3

A-release 57-75 A

Short-circuit release 975 A

Breaking capacity 100 kA

Get a price for 3RV1042-4KB10

Response within 1 business hour

🛡

12-month warranty

All units tested

⚡

Same-day dispatch

Order by 2pm CST

🌐

Worldwide delivery

US, EU, Asia, Middle East

🎖

Veteran-owned

CAGE: 9NK75

Motor protection Adjustable A-release Increased switching capacity Screw terminals Class 20 protection High breaking capacity (100 kA) Size S3

Product description

The Siemens 3RV1042-4KB10 is a Size S3 circuit breaker engineered for motor protection up to 100 kA. It offers an adjustable A-release range of 57-75 A and a substantial short-circuit release of 975 A. This model features screw terminals, increased switching capacity, and Class 20 protection, ideal for motors with higher starting demands.

This robust circuit breaker is designed for protecting larger industrial motors and machinery in demanding sectors like manufacturing, material processing, and automation. Its Class 20 rating ensures reliable operation during motor start-ups, preventing unwanted trips while maintaining essential overload and short-circuit protection.

Stanlo Automation, a veteran-owned surplus parts distributor, is your go-to source for the Siemens 3RV1042-4KB10. We specialize in providing hard-to-find and obsolete industrial automation components, ensuring your critical systems stay operational with quality surplus parts.

Technical specifications

Size	S3
A-release	57-75 A
Short-circuit release	975 A
Breaking capacity	100 kA
Terminal type	Screw terminal
Protection class	Class 20
Function	Motor protection

Common applications

Large motor protection

Industrial machinery

Manufacturing

Material processing

Automation systems

Heavy equipment

Compatible systems

Siemens SIRIUS 3RV2 series accessories

Also known as

Siemens S3 breaker 3RV1042-4KB10 motor protection SIRIUS 3RV1042

Replaces / compatible with

This part is a phased-out product. The preferred successor is the Siemens SIRIUS 3RV2042-4KB10.

Technical note

Expert tip

When using the 3RV1042-4KB10 for motors with very high starting currents, ensure the short-circuit release is set appropriately to avoid premature tripping during normal operation.

What happens next?

Email confirmation

Immediate receipt acknowledgment sent to you

Account manager assigned

Confirms your part's spec and condition

Your quote delivered

Tailored to your specific requirements

Frequently asked questions

What applications are best suited for the Siemens 3RV1042-4KB10 with its Class 20 rating?

The Siemens 3RV1042-4KB10, with its Class 20 protection, is ideal for motors that have high starting torque, long acceleration times, or frequent start/stop cycles. It prevents nuisance tripping during motor startup while still providing essential overload protection.