MERSEN FUSE A 130 URD 71 LLI 0315 A130URD71LLI0315

High-speed aR characteristic fuse with 315A rating and integrated striker indication system for semiconductor protection in industrial environments.

SKU: H300663Alt SKU: A130URD71LLI0315MPN: H300663

List Price £156.25 ex VAT

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Why Choose the Mersen H300663 Protistor® High-Speed Fuse?

The Mersen H300663 (Catalogue No. A130UD71LLI315) is a Protistor® Size 71 aR square body high-speed fuse engineered to provide exceptional protection for semiconductor devices and modern power electronic equipment. Rated at 315A, 1250VAC (IEC) and 1300VAC (UL), it delivers ultra-fast fault clearing for demanding industrial applications.

Designed specifically for protecting IGBTs, thyristors, diodes and other sensitive semiconductor devices, the H300663 combines a ceramic square body construction with silver-plated copper slotted blade terminals and an integrated striker indicator for dependable operation and simplified maintenance.

Its high interrupting capacity, low let-through energy (I²t) and robust construction make it an excellent choice for renewable energy systems, industrial drives, UPS equipment, battery storage and power conversion applications where rapid fault interruption is critical.

Key Advantages

Genuine Mersen Protistor® semiconductor protection fuse.
Ultra-fast aR characteristic for semiconductor protection.
315A current rating.
1250VAC IEC / 1300VAC UL voltage rating.
Integrated striker indicator for remote fuse indication.
Long slotted blade terminals for secure bolted installation.
High breaking capacity for demanding industrial applications.
Designed specifically for power electronics and converter protection.

Key Features

Manufacturer: Mersen
Series: Protistor® Size 71 aR
Manufacturer Part Number: H300663
Catalogue Number: A130UD71LLI315
Square body high-speed semiconductor fuse.
Silver-plated copper slotted blade terminals.
Ceramic body with sand-filled arc-quenching construction.
Integrated striker indication system.
Suitable for worldwide industrial power conversion equipment.

Optimised Protection for Power Electronics

The Mersen H300663 has been engineered specifically to minimise fault energy reaching expensive semiconductor devices. Its ultra-fast aR operating characteristic provides rapid interruption of short-circuit currents while allowing semiconductor equipment to operate normally during transient conditions. This helps maximise equipment reliability while reducing downtime and replacement costs.

Typical Applications

Variable speed drives.
Industrial inverters.
UPS systems.
Battery energy storage systems.
Solar and wind power converters.
Semiconductor protection circuits.
Industrial power conversion equipment.
DC and AC converter systems.

Technical Specifications

Item number	H300663
Catalogue No	A130UD71LLI315
Description	Square Body High-Speed Fuse Protistor® Size 71 aR 1250VAC IEC 1300VAC UL 315A With Striker Slotted Blades long
EAN/UPC Code	3605340331820
Rated voltage AC UL	1300 V
Rated voltage AC IEC	1250 V
Ampere Rating	315 A
AC or DC	AC
Speed/Characteristic	aR
Fuse Size	71
Mounting	Bolted
Clearing I2t At Rated Voltage	129 kA²s
Melting I2t	16 kA²s
AC Max I.R./Breaking Capacity	I1: 126 kA
Indication System	Yes
Indication System Type	Striker
Connection/Terminal Material	Silver-Plated Copper
Connection/Terminal Type	Slotted Blades
Product Width	51 mm
Product Length	157.4 mm
Product Height	56.5 mm
Sell Pack Quantity	3 EA
Sell Pack Weight	1.62 kg
Sell Pack Width	155 mm
Sell Pack Length	165 mm
Sell Pack Height	60 mm
Product group	Semiconductor Protection Fuses
Body/Insulating Material	Ceramic
Product Weight	0.54 kg
Power Dissipation at Rated Current Value	76 W
Fuse Type	Semiconductor
Fuse Class	aR
Voltage	1250 V

Frequently Asked Questions

What is the Mersen H300663 used for?

The H300663 is a Protistor® high-speed semiconductor fuse designed to protect IGBTs, thyristors, diodes and other sensitive power semiconductor devices in industrial power conversion equipment.

What are the voltage ratings?

The fuse is rated at 1250VAC according to IEC standards and 1300VAC according to UL standards.

What is the current rating?

The Mersen H300663 has a continuous current rating of 315A.

Does the fuse include an indicator?

Yes. The H300663 includes an integrated striker indication system for remote fuse operation signalling.

What type of terminals does it use?

This model features long slotted blade terminals with silver-plated copper contacts for bolted installation.

Trusted by Power Electronics Professionals

Mersen Protistor® semiconductor fuses are trusted worldwide by equipment manufacturers, electrical engineers and maintenance professionals for protecting high-value power electronic equipment in demanding industrial applications.

Item number	H300663
Catalogue No	A130UD71LLI315
Description	Square Body High-Speed Fuse Protistor® Size 71 aR 1250VAC IEC 1300VAC UL 315A With Striker Slotted Blades long
EAN/UPC Code	3605340331820
Rated voltage AC UL	1300 V
Rated voltage AC IEC	1250 V
Ampere Rating	315 A
AC or DC	AC
Speed/Characteristic	aR
Fuse Size	71
Mounting	Bolted
Clearing I2t At Rated Voltage	129 kA²s
Melting I2t	16 kA²s
AC Max I.R./Breaking Capacity	I1: 126 kA
Indication System	Yes
Indication System Type	Striker
Connection/Terminal Material	Silver-Plated Copper
Connection/Terminal Type	Slotted Blades
Product Width	51 mm
Product Length	157.4 mm
Product Height	56.5 mm
Sell Pack Quantity	3 EA
Sell Pack Weight	1.62 kg
Sell Pack Width	155 mm
Sell Pack Length	165 mm
Sell Pack Height	60 mm
Product group	Semiconductor Protection Fuses
Body/Insulating Material	Ceramic
Product Weight	0.54 kg
Power Dissipation at Rated Current Value	76 W
Fuse Type	Semiconductor
Fuse Class	aR
Voltage	1250 V

UK delivery

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