MERSEN FUSE 12 URD 70 TT F 0315 12URD70TTF0315

High-speed aR characteristic fuse designed for semiconductor protection with 315A rating, flush end striker indication, and metric threaded bolted connections.

SKU: V300490Alt SKU: PC70UD12C315TFMPN: V300490

List Price £140.22 ex VAT

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Manufacturer Lead Time

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Why Choose the Mersen V300490 PC70UD12C315TF High-Speed Fuse?

The Mersen V300490 (PC70UD12C315TF) is a Protistor® Size 70 ultra-fast square body semiconductor fuse designed to provide exceptional protection for sensitive power semiconductor devices operating in demanding industrial applications. Rated at 315A, 1200VAC (IEC) and 1300VAC (UL), this aR characteristic fuse delivers rapid fault clearing to minimise damage caused by short circuits.

Engineered specifically for power conversion equipment, the V300490 features a robust ceramic square body construction with flush-end metric threaded terminals and an integrated striker indicator for fast fuse status identification. Its low let-through energy (I²t) and high breaking capacity make it ideal for protecting IGBTs, thyristors, diodes and other semiconductor devices.

Manufactured by Mersen, a global leader in electrical protection technology, the V300490 combines proven reliability with international IEC and UL approvals, making it suitable for industrial installations worldwide.

Key Advantages

Genuine Mersen Protistor® semiconductor protection fuse.
Ultra-fast aR characteristic for semiconductor protection.
315A current rating.
1200VAC IEC / 1300VAC UL voltage rating.
Integrated striker indicator for fuse operation indication.
Square body Size 70 design with flush-end metric threaded terminals.
Low I²t limits damage during fault conditions.
Suitable for demanding industrial power electronics.

Key Features

Manufacturer: Mersen
Part number: V300490
Catalogue number: PC70UD12C315TF
Fuse series: Protistor® Size 70
Fuse characteristic: aR ultra-fast semiconductor protection
Current rating: 315A
Rated voltage (IEC): 1200VAC
Rated voltage (UL): 1300VAC
Terminal style: Flush ends with metric threaded connections
Indication system: Integrated striker
Suitable for: Protection of power semiconductor devices

Designed for Modern Power Electronics

The Protistor® range has been engineered to provide advanced protection for modern power conversion equipment where semiconductor devices require extremely rapid fault interruption. The V300490 helps reduce thermal and electrical stress during short-circuit conditions, improving equipment reliability and reducing downtime.

Its square body construction, silver-plated contact surfaces and high interrupting capability make it suitable for demanding industrial environments where dependable semiconductor protection is critical.

Typical Applications

Variable speed drives.
Industrial inverters.
Power converters.
UPS systems.
Soft starters.
Motor drives.
Renewable energy converters.
Semiconductor protection circuits.

Technical Specifications

Item number	V300490
Catalogue No	PC70UD12C315TF
Description	Square Body High-Speed Fuse Protistor® Size 70 aR 1200VAC IEC 1300VAC UL 315A With Striker Flush ends metric threads
EAN/UPC Code	3605340329193
Rated voltage AC UL	1300 V
Rated voltage AC IEC	1200 V
Ampere Rating	315 A
AC or DC	AC
Speed/Characteristic	aR
Fuse Size	70
Mounting	Bolted
Clearing I2t At Rated Voltage	149000 A²s
Melting I2t	20000 A²s
AC Max I.R./Breaking Capacity	I1: 150 kA
Indication System	Yes
Indication System Type	Striker
Connection/Terminal Material	Silver-Plated Brass
Connection/Terminal Type	Flush ends
Product Width	39.8 mm
Product Length	74 mm
Product Height	49.5 mm
Sell Pack Quantity	3 EA
Sell Pack Weight	1.017 kg
Sell Pack Width	85 mm
Sell Pack Length	133 mm
Sell Pack Height	55 mm
Product group	Semiconductor Protection Fuses
Body/Insulating Material	Ceramic
Product Weight	0.339 kg
Power Dissipation at Rated Current Value	66 W
HS Code	85351000
Fuse Type	Semiconductor
Fuse Class	aR
Voltage	1200 V

Frequently Asked Questions

What is the Mersen V300490?

The Mersen V300490 (PC70UD12C315TF) is a Protistor® Size 70 ultra-fast square body semiconductor fuse rated at 315A for high-voltage AC power conversion equipment.

What does the aR fuse characteristic mean?

An aR fuse is designed specifically for semiconductor protection, providing extremely rapid short-circuit protection while allowing equipment to manage normal operating currents.

Which equipment is this fuse designed to protect?

The V300490 is intended to protect semiconductor devices including IGBTs, thyristors, diodes and similar components used within power conversion equipment.

Does the fuse include an operation indicator?

Yes. The fuse incorporates an integrated striker indicator to provide visual indication when the fuse has operated.

Where is the V300490 commonly used?

Typical applications include industrial drives, UPS systems, converters, renewable energy equipment and other power electronic installations requiring high-speed semiconductor protection.

Trusted Semiconductor Protection

The Mersen Protistor® range is widely specified worldwide for protecting high-value power semiconductor devices used in industrial automation, renewable energy, transportation and power conversion systems.

Item number	V300490
Catalogue No	PC70UD12C315TF
Description	Square Body High-Speed Fuse Protistor® Size 70 aR 1200VAC IEC 1300VAC UL 315A With Striker Flush ends metric threads
EAN/UPC Code	3605340329193
Rated voltage AC UL	1300 V
Rated voltage AC IEC	1200 V
Ampere Rating	315 A
AC or DC	AC
Speed/Characteristic	aR
Fuse Size	70
Mounting	Bolted
Clearing I2t At Rated Voltage	149000 A²s
Melting I2t	20000 A²s
AC Max I.R./Breaking Capacity	I1: 150 kA
Indication System	Yes
Indication System Type	Striker
Connection/Terminal Material	Silver-Plated Brass
Connection/Terminal Type	Flush ends
Product Width	39.8 mm
Product Length	74 mm
Product Height	49.5 mm
Sell Pack Quantity	3 EA
Sell Pack Weight	1.017 kg
Sell Pack Width	85 mm
Sell Pack Length	133 mm
Sell Pack Height	55 mm
Product group	Semiconductor Protection Fuses
Body/Insulating Material	Ceramic
Product Weight	0.339 kg
Power Dissipation at Rated Current Value	66 W
HS Code	85351000
Fuse Type	Semiconductor
Fuse Class	aR
Voltage	1200 V

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