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MERSEN FUSE 6,9 GRB 70 ESF 0125 PC70GB69V125ESF

MERSEN FUSE 6,9 GRB 70 ESF 0125 PC70GB69V125ESF

High-speed fuse providing reliable protection for power semiconductor devices at 690VAC and 125A with integrated striker indication and open slot blades.

SKU: F301305Alt SKU: PC70GB69V125ESFMPN: F301305
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List Price £131.67 ex VAT
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£131.67
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Why Choose the Mersen F301305 Protistor® High-Speed Fuse?

The Mersen F301305 (catalogue number PC70GB69V125ESF) is a Protistor® Size 70 gR square body high-speed semiconductor protection fuse engineered to provide full-range protection for modern power electronic equipment. The gR operating class protects against both overloads and short-circuit faults, making it an excellent choice for safeguarding IGBTs, thyristors, diodes and other semiconductor devices.

Manufactured using pure silver fuse elements embedded in solidified sand, the F301305 delivers extremely low let-through energy (I²t), high interrupting performance and excellent thermal cycling capability. Silver-plated contact surfaces, non-magnetic hardware and an integrated striker indicator ensure reliable operation and simplified maintenance in demanding industrial environments.

Rated at 125 A and 690 V AC (IEC), the F301305 features open slot blade (ESF) terminals for convenient installation and is ideally suited to industrial drives, power converters, UPS systems and renewable energy equipment requiring dependable semiconductor protection.

Key Advantages

  • Full-range gR semiconductor protection against overloads and short circuits.
  • 125 A current rating for demanding industrial applications.
  • 690 V AC IEC rated voltage.
  • Open slot blade (ESF) terminal design for straightforward installation.
  • Integrated striker indicator for remote fuse indication.
  • Low I²t reduces stress on sensitive semiconductor devices.
  • Silver-plated contacts for long-term reliability.

Key Features

  • Mersen Protistor® Size 70 gR series.
  • 125 A rated current.
  • 690 V AC IEC voltage rating.
  • gR full-range semiconductor protection.
  • Square body ceramic construction.
  • Open slot blade (ESF) terminals.
  • Integrated striker indication.
  • Excellent cycling capability with low energy let-through.

Complete Semiconductor Protection

The Mersen F301305 has been engineered to provide dependable protection for power semiconductor equipment by interrupting both overload and short-circuit faults. Its current-limiting design significantly reduces electrical and thermal stress on expensive electronic components, improving system reliability and reducing maintenance costs.

Protistor® gR semiconductor fuses are widely specified by OEMs and electrical engineers for industrial power conversion equipment where maximum protection and operational reliability are essential.

Typical Applications

  • Variable frequency drives (VFDs).
  • Industrial motor drives.
  • Power converters.
  • Rectifier systems.
  • Renewable energy inverter systems.
  • UPS systems.
  • Industrial automation equipment.
  • Protection of IGBTs, thyristors and diode modules.

Technical Specifications

Item number F301305
Catalogue No PC70GB69V125ESF
Description Square Body High-Speed Fuse Protistor® Size 70 gR 690VAC IEC 125A With Striker Open Slot Blades
EAN/UPC Code 3605340339505
Rated voltage AC IEC 690 V
Ampere Rating 125 A
RoHS Compliant Yes
AC or DC AC
Speed/Characteristic gR
Fuse Size 70
Mounting Bolted
Clearing I2t At Rated Voltage 11200 A²s
Melting I2t 1897 A²s
AC Max I.R./Breaking Capacity I1: 150 kA
Indication System Yes
Indication System Type Striker
Connection/Terminal Material Silver-Plated Copper
Connection/Terminal Type Open Slot Blades
Product Width 39 mm
Product Length 133.4 mm
Product Height 46 mm
Sell Pack Quantity 3 EA
Sell Pack Weight 1.2 kg
Sell Pack Width 140 mm
Sell Pack Length 70 mm
Sell Pack Height 145 mm
Product group Semiconductor Protection Fuses
Body/Insulating Material Ceramic
Product Weight 0.4 kg
Power Dissipation at Rated Current Value 26 W
Fuse Type Semiconductor
Fuse Class gR
Voltage 690 V

Frequently Asked Questions

What is the Mersen F301305 used for?

The F301305 is a high-speed semiconductor fuse providing full-range protection against overloads and short-circuit faults for power electronic equipment.

What is the current rating of the F301305?

The Mersen F301305 has a 125 A current rating.

What does the gR fuse characteristic mean?

The gR operating class provides complete semiconductor protection against both overloads and short-circuit faults, unlike aR fuses which provide short-circuit protection only.

What voltage is the F301305 rated for?

The fuse has a rated operating voltage of 690 V AC (IEC).

Where is the F301305 commonly installed?

It is commonly installed in industrial drives, UPS systems, converters, renewable energy systems and other power conversion equipment requiring dependable semiconductor protection.

Trusted Protection for Industrial Power Electronics

Mersen Protistor® semiconductor fuses are trusted worldwide by electrical engineers, OEMs and industrial manufacturers for protecting valuable semiconductor equipment in demanding industrial applications.

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