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Siemens 3VL4731-2DK36-0AA0 VL400N Circuit Breaker High Breaking Capacity

Siemens 3VL4731-2DK36-0AA0 VL400N 3-pole circuit breaker, 315A, 70kA

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ManufacturerSiemens

Part number3VL4731-2DK36-0AA0

Part Number 3VL4731-2DK36-0AA0

Manufacturer Siemens

Series VL400N

Poles 3

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High Breaking Capacity 70kA ETU LSI Trip Unit 315A Rated Current 3-Pole Configuration Adjustable Overload and Short-Circuit Settings Designed as a Spare Part

Product description

The Siemens 3VL4731-2DK36-0AA0 is a VL400N circuit breaker featuring high breaking capacity. This 3-pole device has a rated current (In) of 315A and a breaking capacity (Icu) of 70kA at 415V AC. It is equipped with an Electronic Trip Unit (ETU) providing LSI (Long-time, Short-time, Instantaneous) protection. The overload protection (IR) is adjustable from 250A to 315A, with short-time delay (ISD) from 1.5 to 10 times IR, and instantaneous trip (II) at 11 times In. Designed for line protection, this unit is provided as a spare part, without auxiliary releases or auxiliary/alarm switches.

This circuit breaker is well-suited for industrial applications demanding a higher level of fault current protection than standard breakers. It is ideal for use in manufacturing plants, heavy industry, and critical infrastructure where reliable interruption of higher fault levels is crucial. The ETU with LSI settings allows for precise coordination and protection.

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Technical specifications

Part Number	3VL4731-2DK36-0AA0
Manufacturer	Siemens
Series	VL400N
Poles	3
Rated Current (In)	315A
Breaking Capacity (Icu)	70kA at 415V AC
Trip Unit	ETU, LSI
Overload Protection (IR)	250-315A
Short-Time Delay (ISD)	1.5-10xIR
Instantaneous Trip (II)	11xIn
Application	Line Protection
Type	Spare Part

Common applications

Industrial Power Distribution

Heavy Industry

Manufacturing Plants

Critical Infrastructure

Machine Protection

Electrical Switchgear

Compatible systems

Siemens VL400N high capacity power distribution Industrial control panels Heavy-duty electrical switchgear

Also known as

Siemens VL400N ETU breaker Siemens 70kA circuit breaker Siemens 315A high capacity breaker

Replaces / compatible with

This part is supplied as a spare component for replacement in existing Siemens VL400N circuit breaker installations requiring a 70kA breaking capacity and ETU LSI trip unit.

Technical note

Expert tip

When replacing an existing unit, verify that the replacement breaker's trip unit settings (IR, ISD, II) are compatible with the protected circuit's load characteristics and protective device coordination requirements.

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Frequently asked questions

What makes the Siemens 3VL4731-2DK36-0AA0 suitable for demanding industrial applications?

The Siemens 3VL4731-2DK36-0AA0 features a high breaking capacity of 70kA at 415V AC and an Electronic Trip Unit (ETU) with LSI protection. This combination provides robust protection against significant fault currents, ensuring safety and operational continuity in demanding industrial environments.