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Siemens 3VA6 UL Frame 400 3-Pole Starter Protection Breaker

Siemens 3VA6 UL Frame 400 3-pole circuit breaker for starter protection.

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ManufacturerSiemens

Part number3VA6440-1MS31-0AA0

Manufacturer Siemens

Part Number 3VA6440-1MS31-0AA0

Series 3VA6

Frame Size 400

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3-pole configuration UL certified Designed for starter protection ETU310M trip unit with instantaneous function Compact size Robust construction

Product description

The Siemens 3VA6440-1MS31-0AA0 is a 3-pole molded case circuit breaker from the 3VA6 series, specifically designed for starter protection applications under UL standards. It features a 400A frame size and utilizes an ETU310M electronic trip unit with basic 'I' (Instantaneous) protection, without overload functionality.

This breaker is ideal for motor starter applications where the primary protection against short circuits is managed by the trip unit's instantaneous function, often in conjunction with motor overload relays. It is suitable for use in motor control centers and machine tool applications.

Stanlo Automation, a veteran-owned supplier of surplus industrial automation parts, offers the Siemens 3VA6440-1MS31-0AA0. We are committed to providing high-quality, cost-effective solutions for your automation needs.

Technical specifications

Manufacturer	Siemens
Part Number	3VA6440-1MS31-0AA0
Series	3VA6
Frame Size	400
Poles	3
Application	Starter Protection
Trip Unit	ETU310M, I
Overload Protection	None
Short-circuit Protection	Ii=3...13 x In
Connection	Without connection

Common applications

Motor starters

Motor control centers

Machine tools

Industrial automation

Pump controls

Fan controls

Compatible systems

Siemens 3VA Series accessories Motor control centers Industrial starter circuits

Also known as

Siemens 3VA6 motor starter breaker 400A starter protection breaker Siemens 3VA6440 ETU310M breaker

Replaces / compatible with

This breaker is designed for motor starter circuits, often used alongside separate overload relays for comprehensive motor protection.

Technical note

Expert tip

This breaker must be paired with a suitable motor overload relay for complete motor protection, as it lacks built-in overload sensing.

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Frequently asked questions

What is the purpose of the ETU310M trip unit in the Siemens 3VA6440-1MS31-0AA0?

The ETU310M trip unit on the 3VA6440-1MS31-0AA0 provides instantaneous short-circuit protection (Ii) with an adjustable range of 3 to 13 times the nominal current. It does not include overload protection, making it suitable for applications where a separate overload relay is used.