We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

LITTELFUSE Semiconductor Fuse: L50QS Series, Very-Fast-Acting, 300 A, 500 V AC - Very-Fast-Acting Bolt-On Fuses
LITTELFUSEVery-Fast-Acting Bolt-On Fuses

LITTELFUSE Semiconductor Fuse: L50QS Series, Very-Fast-Acting, 300 A, 500 V AC

The LITTELFUSE L50QS Series is a very-fast-acting bolt-on semiconductor fuse rated at 300 A, 500 V AC, and 500 V DC (MPN L50QS300.V). This AC/DC fuse is designed for overcurrent protection in power electronic circuits.

SKU 3G-OTH-25411

Also listed as: L50QS300V · L50QS300 V · L50QS300-V

Brand
LITTELFUSE
Item
Semiconductor Fuse: L50QS Series, Very-Fast-Acting, 300 A, 500 V AC
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

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

LITTELFUSE
Manufacturer Part Number
L50QS300.V
Series
L50QS
Type
Very-Fast-Acting, 300 A
AC
500 V
Voltage Type
AC/DC
DC DC Volt Rating
500 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 L50QS Series is a very-fast-acting bolt-on semiconductor fuse rated at 300 A, 500 V AC, and 500 V DC (MPN L50QS300.V). This AC/DC fuse is designed for overcurrent protection in power electronic circuits.

Frequently Asked Questions

What is the LITTELFUSE L50QS300.V fuse used for?

The LITTELFUSE L50QS300.V is a very-fast-acting bolt-on semiconductor fuse used for overcurrent protection in power electronic circuits, such as inverters, drives, and UPS systems. It handles 300 A at 500 V AC or 500 V DC, safeguarding sensitive components from short circuits.

What are the specifications of the L50QS300.V fuse?

The L50QS300.V is a 300 A, very-fast-acting semiconductor fuse from the LITTELFUSE L50QS Series. It is rated for 500 V AC and 500 V DC, with a bolt-on mounting style. The voltage type is AC/DC, and the manufacturer part number is L50QS300.V.

Where to buy the LITTELFUSE L50QS300.V fuse worldwide?

You can source the LITTELFUSE L50QS300.V 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.

How to select the correct L50QS series fuse for my application?

To select the correct L50QS fuse, match the voltage rating (500 V AC or DC) and current rating (300 A for the L50QS300.V) to your circuit requirements. Ensure the very-fast-acting characteristic suits your semiconductor protection needs. Consult the LITTELFUSE datasheet for mounting and clearance details.

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: L50QS Series, Very-Fast-Acting, 500 A, 500 V AC, 500 V DC DC Volt Rating (MPN L50QS500.X)
LITTELFUSE
Semiconductor Fuse: L50QS Series, Very-Fast-Acting, 500 A, 500 V AC, 500 V DC DC Volt Rating (MPN L50QS500.X)
Semiconductor Fuse: L50QS Series, Very-Fast-Acting, 275 A, 500 V AC, 500 V DC DC Volt Rating (MPN L50QS275.V)
LITTELFUSE
Semiconductor Fuse: L50QS Series, Very-Fast-Acting, 275 A, 500 V AC, 500 V DC DC Volt Rating (MPN L50QS275.V)
Semiconductor Fuse: L50QS Series, Very-Fast-Acting, 150 A, 500 V AC, 500 V DC DC Volt Rating (MPN L50QS150.V)
LITTELFUSE
Semiconductor Fuse: L50QS Series, Very-Fast-Acting, 150 A, 500 V AC, 500 V DC DC Volt Rating (MPN L50QS150.V)
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: L50QS Series, Very-Fast-Acting, 200 A, 500 V AC, 500 V DC DC Volt Rating (MPN L50QS200.V)
LITTELFUSE
Semiconductor Fuse: L50QS Series, Very-Fast-Acting, 200 A, 500 V AC, 500 V DC DC Volt Rating (MPN L50QS200.V)
Semiconductor Fuse: L50QS Series, Very-Fast-Acting, 450 A, 500 V AC, 500 V DC DC Volt Rating (MPN L50QS450.X)
LITTELFUSE
Semiconductor Fuse: L50QS Series, Very-Fast-Acting, 450 A, 500 V AC, 500 V DC DC Volt Rating (MPN L50QS450.X)

More from LITTELFUSE

View all LITTELFUSE parts
Semiconductor Fuse: L50QS Series, Very-Fast-Acting, 125 A, 500 V AC, 500 V DC DC Volt Rating (MPN L50QS125.V)
LITTELFUSE
Semiconductor Fuse: L50QS Series, Very-Fast-Acting, 125 A, 500 V AC, 500 V DC DC Volt Rating (MPN L50QS125.V)
Semiconductor Fuse: L75QS Series, Very-Fast-Acting, 175 A, 750 V DC DC Volt Rating, Non-Indicating (MPN L75QS175.V)
LITTELFUSE
Semiconductor Fuse: L75QS Series, Very-Fast-Acting, 175 A, 750 V DC DC Volt Rating, Non-Indicating (MPN L75QS175.V)
Semiconductor Fuse: L70QS Series, Very-Fast-Acting, 60 A, 700 V AC, 700 V DC DC Volt Rating (MPN L70QS060.V)
LITTELFUSE
Semiconductor Fuse: L70QS Series, Very-Fast-Acting, 60 A, 700 V AC, 700 V DC DC Volt Rating (MPN L70QS060.V)
Semiconductor Fuse: L70QS Series, Very-Fast-Acting, 35 A, 700 V AC, 700 V DC DC Volt Rating (MPN L70QS035.V)
LITTELFUSE
Semiconductor Fuse: L70QS Series, Very-Fast-Acting, 35 A, 700 V AC, 700 V DC DC Volt Rating (MPN L70QS035.V)
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, 90 A, 750 V DC DC Volt Rating, Non-Indicating (MPN L75QS090.V)
LITTELFUSE
Semiconductor Fuse: L75QS Series, Very-Fast-Acting, 90 A, 750 V DC DC Volt Rating, Non-Indicating (MPN L75QS090.V)
Semiconductor Fuse: L75QS Series, Very-Fast-Acting, 70 A, 750 V DC DC Volt Rating, Non-Indicating (MPN L75QS070.V)
LITTELFUSE
Semiconductor Fuse: L75QS Series, Very-Fast-Acting, 70 A, 750 V DC DC Volt Rating, Non-Indicating (MPN L75QS070.V)
Semiconductor Fuse: L75QS Series, Very-Fast-Acting, 150 A, 750 V DC DC Volt Rating, Non-Indicating (MPN L75QS150.V)
LITTELFUSE
Semiconductor Fuse: L75QS Series, Very-Fast-Acting, 150 A, 750 V DC DC Volt Rating, Non-Indicating (MPN L75QS150.V)