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LITTELFUSE Semiconductor Fuse: L70QS Series, Very-Fast-Acting, 400 A, 700 V AC - Very-Fast-Acting Bolt-On Fuses
LITTELFUSEVery-Fast-Acting Bolt-On Fuses

LITTELFUSE Semiconductor Fuse: L70QS Series, Very-Fast-Acting, 400 A, 700 V AC

The LITTELFUSE L70QS Series is a very-fast-acting bolt-on semiconductor fuse, model L70QS400.X, rated for 400 A at 700 V AC and 700 V DC. This AC/DC fuse is designed for overcurrent protection in power electronic…

SKU 3G-OTH-26076

Brand
LITTELFUSE
Item
Semiconductor Fuse: L70QS Series, Very-Fast-Acting, 400 A, 700 V AC
Category
Very-Fast-Acting Bolt-On Fuses
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Technical Specifications

LITTELFUSE
Manufacturer Part Number
L70QS400.X
Series
L70QS
Type
Very-Fast-Acting, 400 A
AC
700 V
Voltage Type
AC/DC
DC DC Volt Rating
700 V
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LITTELFUSE Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The LITTELFUSE L70QS Series is a very-fast-acting bolt-on semiconductor fuse, model L70QS400.X, rated for 400 A at 700 V AC and 700 V DC. This AC/DC fuse is designed for overcurrent protection in power electronic applications.

Frequently Asked Questions

What is the LITTELFUSE L70QS400.X fuse used for?

The LITTELFUSE L70QS400.X is a very-fast-acting bolt-on semiconductor fuse used for overcurrent protection in power electronic applications such as drives, inverters, and UPS systems. It protects sensitive components from short circuits and overloads in AC/DC circuits up to 700 V.

What are the specifications of the L70QS400.X fuse?

The L70QS400.X is a 400 A, very-fast-acting fuse rated for 700 V AC and 700 V DC. It is part of the LITTELFUSE L70QS Series and features a bolt-on design for secure mounting in industrial equipment. The voltage type is AC/DC, making it suitable for both alternating and direct current systems.

Where to buy the LITTELFUSE L70QS400.X fuse worldwide?

You can source the LITTELFUSE L70QS400.X fuse worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we supply genuine LITTELFUSE components for power electronics.

How to select the correct L70QS fuse for my application?

To select the correct L70QS fuse, match the voltage rating (700 V AC/DC) and current rating (400 A for the L70QS400.X) to your circuit requirements. Ensure the very-fast-acting characteristic aligns with the inrush current of your semiconductor devices. Consult the LITTELFUSE application guide for coordination with upstream protection.

Used in

Common applications for LITTELFUSE
Power electronics protection — Littelfuse PSR Series semiconductor fuses for IGBT and diode protection in variable frequency drives.
Solar photovoltaic systems — Littelfuse SPF Series fast-acting fuses for string overcurrent protection in PV arrays.
Automotive electrical systems — Littelfuse MIDI® 498 Series bolt-on fuses for battery and alternator protection in vehicles.
Industrial control panels — Littelfuse KLKD Series midget fuses for branch circuit protection in control transformers and relays.
Motor control centers — Littelfuse BLF Series fast-acting fuses for short-circuit protection of motor starters and contactors.

LITTELFUSE Products

3G Electric supplies LITTELFUSE very-fast-acting bolt-on fuses. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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