Ferraz Shawmut 27x60 URQ/URS/URB Semiconductor Fuses (690V-1000V)

Locating specific legacy protection components for aging industrial drives and rectifiers can be a major challenge for procurement teams and facility managers. Despite being classified as discontinued by the original manufacturer, we continue to supply genuine Ferraz Shawmut 27x60 URQ, URS, and URB Protistor Fuses to keep critical power semiconductor equipment running without costly complete system retrofits.

Product Overview

The Ferraz Shawmut (Mersen) 27x60 mm ferrule fuse series comprises extremely high breaking capacity purely built for the protection of power semiconductors such as thyristors, diodes, and triacs. Meeting rigorous IEC and VDE standards for aR-class performance, these fast-acting components effortlessly clear faults rapidly to minimize total I²t let-through, preserving highly sensitive and expensive power electronics.

Typical Applications

  • Protection of heavy industrial rectifiers and complex power converters.
  • Safeguarding thyristors, AC/DC drives, and variable speed motor controllers.
  • Direct integration into high-power UPS (Uninterruptible Power Supply) and traction systems.
  • Maintenance retrofits and direct identical-part replacements for obsolete legacy panels.

Key Features & Benefits

  • Broad Voltage Range: Ratings structured across 690 V AC (URQ/URS) and 1000 V AC (URB).
  • Built-in Trip-Indicator: Every model listed features integrated visual trip-indication for rapid fault location.
  • Super-fast Operation: aR-class characteristics enforce ultra-low energy let-through.
  • Tested Breaking Capacity: Certified up to 200 kA at 690 V and 100k A at 1000 V.

Available Legacy Catalog Guide

Type URQ — 690 V AC (With Trip-Indicator)

Voltage: 690 V AC • Current Range: 50A to 250A • Tested Breaking Capacity: 200 kA

Catalog Number Voltage Current Designation Action
FR27UQ69V50T Ref: N075958 690 V 50 A 6.921 CP URQ 27x60/ 50 REQUEST QUOTE
FR27UQ69V63T Ref: V076309 690 V 63 A 6.921 CP URQ 27x60/ 63 REQUEST QUOTE
FR27UQ69V80T Ref: W076310 690 V 80 A 6.921 CP URQ 27x60/ 80 REQUEST QUOTE
FR27UQ69V100T Ref: R078330 690 V 100 A 6.921 CP URQ 27x60/100 REQUEST QUOTE
FR27UQ69V125T Ref: S078331 690 V 125 A 6.921 CP URQ 27x60/125 REQUEST QUOTE
FR27UQ69V160T Ref: X076311 690 V 160 A 6.921 CP URQ 27x60/160 REQUEST QUOTE
FR27UQ69V200T Ref: T078332 690 V 200 A 6.921 CP URQ 27x60/200 REQUEST QUOTE
FR27UQ69V250T Ref: T076308 690 V 250 A 6.921 CP URQ 27x60/250 REQUEST QUOTE

Type URS — 690 V AC (With Trip-Indicator)

Voltage: 690 V AC • Current Range: 125A to 160A • Tested Breaking Capacity: 200 kA

Catalog Number Voltage Current Designation Action
FR27US69V125T Ref: P209865 690 V 125 A 6.921 CP URS 27x60/125 REQUEST QUOTE
FR27US69V160T Ref: Q209866 690 V 160 A 6.921 CP URS 27x60/160 REQUEST QUOTE

Type URB — 1000 V AC (With Trip-Indicator)

Voltage: 1000 V AC • Current Range: 32A to 170A • Tested Breaking Capacity: 100 kA

Catalog Number Voltage Current Designation Action
FR27UB10C32T Ref: S081298 1000 V 32 A 1021 CP URB 27x60/ 32 REQUEST QUOTE
FR27UB10C40T Ref: R081297 1000 V 40 A 1021 CP URB 27x60/ 40 REQUEST QUOTE
FR27UB10C50T Ref: Q081296 1000 V 50 A 1021 CP URB 27x60/ 50 REQUEST QUOTE
FR27UB10C63T Ref: P081295 1000 V 63 A 1021 CP URB 27x60/ 63 REQUEST QUOTE
FR27UB10C80T Ref: N081294 1000 V 80 A 1021 CP URB 27x60/ 80 REQUEST QUOTE
FR27UB10C100T Ref: M081293 1000 V 100 A 1021 CP URB 27x60/100 REQUEST QUOTE
FR27UB10C125T Ref: L081292 1000 V 125 A 1021 CP URB 27x60/125 REQUEST QUOTE
FR27UB10C160T Ref: K081291 1000 V 160 A 1021 CP URB 27x60/160 REQUEST QUOTE
FR27UB10C170T Ref: Z080338 1000 V 170 A 1021 CP URB 27x60/170 REQUEST QUOTE
Standard: IEC 60269.1 and 60269.4  |  Rating: 690V / 1000V AC  |  Class / Category: aR-CLASS (According to VDE 636-23 / UL Recognized URQ and URB)

Need these discontinued Ferraz Shawmut fuses right away? Reach out with exactly what you need and our sourcing engineers will supply them quickly to prevent costly system downtime.

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