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Siemens 3KF4340-0MF11 400A 3-Pole Switch Disconnector with Fuse

Siemens 3KF4340-0MF11 400A Size 4, 3-pole switch disconnector with fuse.

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ManufacturerSiemens

Part number3KF4340-0MF11

Current Rating 400 A

Pole Configuration 3-pole

Size 4

Fuse Type LV HRC fuse Sz. 1 and 2

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400A high current rating Size 4 robust design Accepts LV HRC fuse sizes 1 & 2 3-pole configuration Central front operation Flat terminals

Product description

The Siemens 3KF4340-0MF11 is a robust Size 4, 3-pole switch disconnector with a 400A current rating, designed for use with LV HRC fuse sizes 1 and 2. This basic unit, supplied without a handle, features a central front operating mechanism and flat terminals, offering a reliable solution for high-current power isolation and protection. It is built to withstand demanding industrial environments.

This high-capacity switch disconnector is ideal for main power disconnects in large industrial facilities, heavy machinery, power distribution substations, and critical infrastructure applications. Its ability to accommodate larger fuse sizes makes it suitable for applications requiring significant fault current protection.

Stanlo Automation, a veteran-owned surplus industrial parts distributor, offers the Siemens 3KF4340-0MF11. We provide access to quality automation components, helping you find the necessary parts for your industrial needs at competitive prices.

Technical specifications

Current Rating	400 A
Pole Configuration	3-pole
Size	4
Fuse Type	LV HRC fuse Sz. 1 and 2
Operating Mechanism	Front operating mechanism center
Terminal Type	Flat terminal
Handle	Not included (basic unit)

Common applications

Main disconnects for heavy machinery

Industrial power substations

High-capacity power distribution

Manufacturing plants

Critical infrastructure protection

Compatible systems

Siemens 3KF Series size 4 switch disconnectors

Also known as

Siemens 3KF4340-0MF11 disconnector 3KF size 4 switch disconnector Siemens 400A fuse disconnect

Replaces / compatible with

Replaces or upgrades standard fuse disconnectors requiring LV HRC fuse sizes 1 or 2 for high-current applications. Compatible with Siemens 3KF Series size 4 switch disconnectors.

Technical note

Expert tip

Proper installation and torque specifications for the flat terminals of the 3KF4340-0MF11 are critical to ensure safe and reliable 400A operation.

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Frequently asked questions

What are the compatible LV HRC fuse sizes for the Siemens 3KF4340-0MF11 switch disconnector?

The Siemens 3KF4340-0MF11 switch disconnector is designed to accept LV HRC fuse sizes 1 and 2. It has a 400A current rating and a 3-pole configuration.