Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

LITTELFUSE Semiconductor Fuse: L75QS Series, Very-Fast-Acting, 800 A, 750 V DC DC Volt Rating - Very-Fast-Acting Bolt-On Fuses
LITTELFUSEVery-Fast-Acting Bolt-On Fuses

LITTELFUSE Semiconductor Fuse: L75QS Series, Very-Fast-Acting, 800 A, 750 V DC DC Volt Rating

The LITTELFUSE L75QS Series is a very-fast-acting bolt-on semiconductor fuse, model L75QS800.X, rated for 800 A at 750 V DC. This DC-only fuse is non-indicating and designed for overcurrent protection in power…

SKU 3G-OTH-26215

Also listed as: L75QS800X · L75QS800 X · L75QS800-X

Brand
LITTELFUSE
Item
Semiconductor Fuse: L75QS Series, Very-Fast-Acting, 800 A, 750 V DC DC Volt Rating
Category
Very-Fast-Acting Bolt-On Fuses
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

LITTELFUSE
Manufacturer Part Number
L75QS800.X
Series
L75QS
Type
Very-Fast-Acting, 800 A, Non-Indicating
Voltage Type
DC Only
DC DC Volt Rating
750 V

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

LITTELFUSE Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The LITTELFUSE L75QS Series is a very-fast-acting bolt-on semiconductor fuse, model L75QS800.X, rated for 800 A at 750 V DC. This DC-only fuse is non-indicating and designed for overcurrent protection in power electronic circuits.

Frequently Asked Questions

What is the LITTELFUSE L75QS800.X semiconductor fuse used for?

The LITTELFUSE L75QS800.X is a very-fast-acting bolt-on fuse used for overcurrent protection in power electronic circuits such as drives, inverters, and DC power supplies. Its 800 A rating and 750 V DC voltage rating make it suitable for high-current DC applications where rapid fault clearing is critical.

What are the specifications of the L75QS800.X fuse?

The L75QS800.X is a LITTELFUSE L75QS Series very-fast-acting, non-indicating semiconductor fuse. It is rated for 800 A at 750 V DC, with a DC-only voltage type. The bolt-on design ensures secure mounting in power electronic equipment.

Where to buy the L75QS800.X fuse worldwide?

3G Electric supplies the LITTELFUSE L75QS800.X fuse worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this very-fast-acting semiconductor fuse to your facility. Contact us for pricing and lead time.

How to select a very-fast-acting fuse for DC applications?

Select a very-fast-acting fuse like the LITTELFUSE L75QS800.X by matching its voltage rating (750 V DC) and current rating (800 A) to your circuit requirements. Ensure the fuse's interrupting rating exceeds available fault current, and verify bolt-on mounting compatibility with your equipment.

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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
Semiconductor Fuse: L75QS Series, Very-Fast-Acting, 400 A, 750 V DC DC Volt Rating, Non-Indicating (MPN L75QS400.X)
LITTELFUSE
Semiconductor Fuse: L75QS Series, Very-Fast-Acting, 400 A, 750 V DC DC Volt Rating, Non-Indicating (MPN L75QS400.X)
Semiconductor Fuse: L75QS Series, Very-Fast-Acting, 200 A, 750 V DC DC Volt Rating, Non-Indicating (MPN L75QS200.V)
LITTELFUSE
Semiconductor Fuse: L75QS Series, Very-Fast-Acting, 200 A, 750 V DC DC Volt Rating, Non-Indicating (MPN L75QS200.V)
Semiconductor Fuse: L75QS Series, Very-Fast-Acting, 80 A, 750 V DC DC Volt Rating, Non-Indicating (MPN L75QS080.V)
LITTELFUSE
Semiconductor Fuse: L75QS Series, Very-Fast-Acting, 80 A, 750 V DC DC Volt Rating, Non-Indicating (MPN L75QS080.V)
Semiconductor Fuse: L75QS Series, Very-Fast-Acting, 225 A, 750 V DC DC Volt Rating, Non-Indicating (MPN L75QS225.X)
LITTELFUSE
Semiconductor Fuse: L75QS Series, Very-Fast-Acting, 225 A, 750 V DC DC Volt Rating, Non-Indicating (MPN L75QS225.X)
Semiconductor Fuse: L75QS Series, Very-Fast-Acting, 500 A, 750 V DC DC Volt Rating, Non-Indicating (MPN L75QS500.X)
LITTELFUSE
Semiconductor Fuse: L75QS Series, Very-Fast-Acting, 500 A, 750 V DC DC Volt Rating, Non-Indicating (MPN L75QS500.X)
Semiconductor Fuse: L75QS Series, Very-Fast-Acting, 600 A, 750 V DC DC Volt Rating, Non-Indicating (MPN L75QS600.X)
LITTELFUSE
Semiconductor Fuse: L75QS Series, Very-Fast-Acting, 600 A, 750 V DC DC Volt Rating, Non-Indicating (MPN L75QS600.X)

More from LITTELFUSE

View all LITTELFUSE parts
Semiconductor Fuse: L50QS Series, Very-Fast-Acting, 225 A, 500 V AC, 500 V DC DC Volt Rating (MPN L50QS225.V)
LITTELFUSE
Semiconductor Fuse: L50QS Series, Very-Fast-Acting, 225 A, 500 V AC, 500 V DC DC Volt Rating (MPN L50QS225.V)
Semiconductor Fuse: L70QS Series, Very-Fast-Acting, 80 A, 700 V AC, 700 V DC DC Volt Rating (MPN L70QS080.V)
LITTELFUSE
Semiconductor Fuse: L70QS Series, Very-Fast-Acting, 80 A, 700 V AC, 700 V DC DC Volt Rating (MPN L70QS080.V)
Semiconductor Fuse: L75QS Series, Very-Fast-Acting, 40 A, 750 V DC DC Volt Rating, Non-Indicating (MPN L75QS040.V)
LITTELFUSE
Semiconductor Fuse: L75QS Series, Very-Fast-Acting, 40 A, 750 V DC DC Volt Rating, Non-Indicating (MPN L75QS040.V)
Semiconductor Fuse: L75QS Series, Very-Fast-Acting, 125 A, 750 V DC DC Volt Rating, Non-Indicating (MPN L75QS125.V)
LITTELFUSE
Semiconductor Fuse: L75QS Series, Very-Fast-Acting, 125 A, 750 V DC DC Volt Rating, Non-Indicating (MPN L75QS125.V)
Semiconductor Fuse: L70QS Series, Very-Fast-Acting, 250 A, 700 V AC, 700 V DC DC Volt Rating (MPN L70QS250.X)
LITTELFUSE
Semiconductor Fuse: L70QS Series, Very-Fast-Acting, 250 A, 700 V AC, 700 V DC DC Volt Rating (MPN L70QS250.X)
Semiconductor Fuse: L70QS Series, Very-Fast-Acting, 600 A, 700 V AC, 700 V DC DC Volt Rating (MPN L70QS600.X)
LITTELFUSE
Semiconductor Fuse: L70QS Series, Very-Fast-Acting, 600 A, 700 V AC, 700 V DC DC Volt Rating (MPN L70QS600.X)
Semiconductor Fuse: L50QS Series, Very-Fast-Acting, 400 A, 500 V AC, 500 V DC DC Volt Rating (MPN L50QS400.V)
LITTELFUSE
Semiconductor Fuse: L50QS Series, Very-Fast-Acting, 400 A, 500 V AC, 500 V DC DC Volt Rating (MPN L50QS400.V)
Semiconductor Fuse: L50QS Series, Very-Fast-Acting, 250 A, 500 V AC, 500 V DC DC Volt Rating (MPN L50QS250.V)
LITTELFUSE
Semiconductor Fuse: L50QS Series, Very-Fast-Acting, 250 A, 500 V AC, 500 V DC DC Volt Rating (MPN L50QS250.V)