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MERSEN FUSE 6,9 GRB 17/12 6,9GRB17/12
The Protistor® 17×49 gR 690VAC fuse-link delivers reliable and rapid circuit protection for demanding industrial applications. Certified to IEC standards and fully compliant with British Standard dimensions, this 12A fuse-link ensures operational safety and equipment longevity.
£12.42
Why Choose the Mersen W220957 BS17GB69V12 Semiconductor Fuse?
The Mersen W220957 BS17GB69V12 is a high-speed Protistor® British Standard fuse-link developed to protect power semiconductors and associated industrial electrical equipment. Its compact construction, extremely high breaking capacity and full-range gR operating characteristic make it suitable for circuits requiring dependable protection against both overloads and short circuits.
Rated at 12 A and 690 V AC under IEC specifications, the W220957 is designed for use in industrial drives, rectifiers, small inverters, UPS systems and other power-electronic installations. It also carries UL voltage ratings of 700 V AC and 600 V DC, supporting integration into equipment manufactured for different international markets.
The fuse uses a compact 17 × 49 mm format with copper L-bracket terminals for secure bolted installation. A breaking capacity of up to 200 kA at 690 V AC enables it to interrupt substantial prospective fault currents while limiting the energy passed to sensitive downstream components.
Key Advantages
- gR full-range protection for semiconductor circuits.
- Protects against both overload and short-circuit currents.
- 12 A current rating for lower-current industrial power electronics.
- 690 V AC IEC rating for demanding electrical installations.
- 200 kA breaking capacity for reliable fault interruption.
- Compact 17 × 49 mm design for space-conscious equipment.
- Supports selective coordination within suitable distribution circuits.
Key Features
- Mersen Protistor® BS88-4 semiconductor fuse-link.
- Catalogue number BS17GB69V12.
- Manufacturer item number W220957.
- 12 A rated current.
- 690 V AC IEC voltage rating.
- 700 V AC and 600 V DC UL voltage ratings.
- gR operating class.
- Extremely high breaking capacity.
- Ceramic body with copper L-bracket terminals.
- Bolted mounting arrangement.
- Version without an operation indicator.
Full-Range gR Semiconductor Protection
A gR fuse provides full-range protection for power semiconductor equipment, allowing it to respond to sustained overloads as well as severe short-circuit faults. This differs from an aR semiconductor fuse, which is primarily intended for partial-range short-circuit protection and may require separate overload protection.
The low melting and clearing I²t values of the Mersen W220957 help restrict the thermal energy transmitted during a fault. This assists in protecting sensitive components such as diodes, thyristors, rectifier assemblies and power-conversion modules from potentially costly damage.
Typical Applications
- Variable speed AC drives.
- Small industrial inverters.
- Rectifiers and power converters.
- Uninterruptible power supply systems.
- Semiconductor switching equipment.
- Industrial motor-control panels.
- Power distribution circuits requiring selective fuse coordination.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Type | Semiconductor | |
|---|---|---|
| Fuse Size | 17x49 mm | |
| Voltage | 690 V | |
| Item number | W220957 | |
| Catalogue No | BS17GB69V12 | |
| Description | British Standard fuse-link Protistor® 17x49 gR 690VAC IEC 12A | |
| EAN/UPC Code | 3605340248425 | |
| Rated voltage AC UL | 700 V | |
| Rated voltage DC UL | 600 V | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 12 A | |
| AC or DC | AC | |
| Fuse Size | 17x49 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 30 A²s | |
| Melting I2t | 4.2 A²s | |
| AC Max I.R./Breaking Capacity | I1: 200 kA | |
| Design Details | gRB | |
| Connection/Terminal Material | Copper | |
| Connection/Terminal Type | L Brackets | |
| Product Diameter | 18.5 mm | |
| Product Length | 77.2 mm | |
| Sell Pack Quantity | 10 EA | |
| Sell Pack Weight | 0.39 kg | |
| Sell Pack Width | 100 mm | |
| Sell Pack Length | 195 mm | |
| Sell Pack Height | 25 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.039 kg | |
| Power Dissipation at Rated Current Value | 3.5 W | |
| HS Code | 85361050 | |
| Country of Manufacture | India |
Frequently Asked Questions
What is the Mersen W220957 used for?
The W220957 protects power semiconductors and associated equipment in applications such as variable speed drives, rectifiers, inverters, UPS systems and industrial power converters.
What is the current rating of the W220957?
The Mersen W220957 has a rated current of 12 A.
What voltage is the W220957 rated for?
It is rated at 690 V AC under IEC specifications. Its UL ratings are 700 V AC and 600 V DC.
What does the gR classification mean?
gR identifies a full-range semiconductor fuse designed to protect against both overload and short-circuit currents, subject to correct circuit coordination and installation.
Does the Mersen W220957 have an operation indicator?
No. The W220957 is the version without an indication system. Versions with a striker or indicator have different Mersen item and catalogue numbers.
What is the breaking capacity of this fuse?
The W220957 has an extremely high breaking capacity of up to 200 kA at 690 V AC.
Can another fuse be used as a replacement?
A replacement must match the current rating, voltage rating, gR operating class, breaking capacity, dimensions and terminal configuration. Compatibility should be confirmed against the equipment manufacturer’s specifications.
Trusted Semiconductor Protection from Mersen
Mersen Protistor® fuse-links are trusted by equipment manufacturers, panel builders and maintenance engineers to provide dependable protection for sensitive semiconductor equipment in demanding industrial applications.
