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Industrial fuse product families

Choose by voltage class and application. Each family page carries its ratings, catalog numbers and the standards it is built to. If the fuse you need is not listed — or is no longer made by anyone — we can usually build it.

Medium & high voltage fuses

A different voltage class?

Medium voltage is a range, not one rating. DENCO builds E-, R- and C-rated fuses across it — including ampere ratings, mountings and indicator options that are no longer catalogued by the original manufacturer.

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International

Semiconductor protection

Renewable energy

Special purpose

Full range

Product detail

  • Medium/High Voltage Distribution Fuses
  • International Fuses
  • Special Purpose Fuses
  • High-Quality Fuses: Engineered for Excellence

Excellence in Manufacturing Quality Fuses for over 30 years

Medium / High Voltage Distribution Fuses

We produce all standard medium and high voltage fuses, along with custom designs and production of one-of-a-kind fuses for our client’s specific needs and requirements.

Our manufacturing lead times are unmatched. Industry standard turnaround is 90 days, but we can fabricate our products within 30 days. We know that when it comes to electrical circuits, short lead times and quality products make all the difference.

E-Rated (PT) Transformer / Potential Transformer Protection Distribution Fuses

AC Voltages
625V, 1500V, 2.75KV, 5.5KV, 8.25KV 12KV, 15.5KV, 24KV, 25.8kV & 36KV
Amperages
0.5E to 400E, 0.5A to 400A
Interrupting Ratings
31KA, 38KA, 50KA, 60KA, 63KA, 80KA, 82KA, 100KA & 120KA
With or Without Visual Trip Indicator or Microswitch
Clip-on Style Mounting or End Bracket Design

General Purpose, Main & Back-up Protection Designs Suitable for Indoor or Outdoor in an Enclosure. Types 9F60, 9F62 Series, EJ-1, EJO-1 & Standard.

Mounting Types: Clip-on, bolt-on with brackets, clip-lock, or custom mounting designs.

E-Rated fuses used for transformer protection or distribution systems. PT fuses offer high interruption rating current limiting for primary winding protection of potential transformers.

R-Rated Motor Starter / Soft Starter Protection Distribution Fuses

AC Voltage
2.5KV, 4.8KV & 7.2KV
Amperages
1R, 2R, 3R, 4R, 5R, 6R, 9R, 12R, 18R, 24R & 36R
Interrupting Rating
RMS Sym 63KA & 65KA, RMS Asym 100KA

Note: R-Rated fuses will melt in the range of 15 to 35 seconds at a value of current equal to 100 times the “R” rating.

R-Rated Current Limiting, High Interruption Rating Fuses Intended for Short-Circuit Protection. Types 9F60 Series, EJ-2 & Standard.

Medium Voltage Motor Protection, Motor Starter Fuses, Motor Controllers, Motor Circuit Protection.

DIN 43625 / IEC 282-1 / BS 2692. Single, Double and Triple Barrel Configurations.

C-Rated Capacitor Protection Distribution Fuses

Various Mounting Configurations offering manufacturers and clients a wide selection of cost and space saving solutions.

Note: The Fuse will melt in 1000 seconds at a current value between 1.7 and 2.4 times the “C” rating.

High Interrupting Rating, Current Limiting, Silent Operation with No Discharge. Suitable Indoor or Outdoor in an Enclosure. Type DM NX, 9F60 Series, EJ-5, EJO-5 and Standard.

Designed to protect against capacitor case rupture or dielectric failure within the capacitor. Our capacitor fuses provide short-circuit and overload protection .

Suitable for Capacitor protection, Power Factor Correction Equipment, Harmonic Filtering Equipment, Induction Heating Systems, High Power Drive & Welders.

Loadbreak Elbow Fuses

AC Voltage
8.3KV, 15.5KV & 24KV
Amperages
3A to 80A
Interrupting Rating
30KA & 50KA
Designed to ANSI C37-40, 41, 47 Specs.

Our hermetically sealed Full-Range, Current Limiting, Loadbreak Elbow Fuses provide overload and fault current protection for distribution equipment by limiting the let-through fault current while dramatically reducing stress on the equipment.

Used for underground distribution systems, and suitable for single-phase load protection in vault, subsurface, or pad-mount installations. They’re also great for radical taps, junctions, transformers and other equipment.

International Fuses

BS88 British Standard Fuse

250V, 2A to 100Amp Fuses 300V, 125A to 600Amp Fuses 450V, 5A to 600Amp Fuses 550V, 8A to 200Amp Fuses 690V, 5A to 600Amp Fuses 1000V, 400A to 600Amp Fuses

Semiconductor Type Ultra Rapid British Standard Fuses. High Braking Capacity, Low Power Dissipation, High Current Limiting, Low Switching Voltage with Excellent Performance.

British Standard Fuses for UK or British manufactured equipment, also used in North American UPS applications.

Type NH Square Body Fuses

500V /690V, 10A to 2000Amps, Sizes NH000 to NH5, Equipped for Micro Switch, DIN 43620 Fuses 690V /800V, 10A to 2000Amps, Size NH000 to NH5, Pin Indicator, DIN 43620 Fuses 690V /800V, 10A to 400Amps, Size NH000 to NH00, Pin Indicator, DIN 43653 Fuses 1000V /1300V, 40A to 1600Amps, Size NH1 to NH3, Equipped for Micro Switch, DIN 43653 Fuses

Square-Body Fuses for aR (Semiconductor Protection), gL/gG (General Purpose Fuses), aM (Motor Protection), gTR (Transformer Protection), gB (Mining Fuses), and gR (Full Range Semiconductor Protection). Silver plated knife blades, short or long and ceramic bodies. Used in DC common Bus, DC Drives, Power converters/rectifiers and reduced voltage starters. Can be fabricated with Visual Indicator, Micro Switch or Pin for Micro Switch.

Type HH – High Voltage HRC Fuse-Links

7.2KV, 2A to 400Amps, German Style & Type “Gardy” Fuses 8.3KV, 2A to 80Amps, German Style Fuses 17.5KV, 2A to 250Amps, German Style & Type “Gardy” Fuses 24KV, 2A to 100Amps, German Style Fuses 36KV, 2A to 100Amps, German Style & Type “Gardy” Fuses

German Fuse (Current-Limiting) Conforms to DIN 43625, IEC 282-1, VDE 0670. Used in Medium to High Voltage Distribution networks, Transformers, condensers and engines for Primary Fuses, Backup Fuses or Full Range Fuses. Various types for indoor, outdoor and oil-submerged applications.

Ultra-Rapid Semiconductor Fuses

Semiconductor Fuses / Form 101

130V 1A to 2000Amps, American, Type UFR Form 101 Fuses 250V 1A to 2000Amps, American, Type UFR Form 101 Fuses 500V 1A to 1600Amps, American, Type UFR Form 101 Fuses 600V 1A to 1600Amps, American, Type UFR Form 101 Fuses 700V 1A to 800Amps, American, Type UFR Form 101 Fuses 1000V 1A to 1000Amps, American, Type UFR Form 101 Fuses

Semiconductor Technology Fuses (Ultra-Rapid /Fast Acting, 200KA IR, Current Limiting, High Interrupting Capacity with Superior DC Capabilities as well). American Standard (cylindrical design). Extending circuit protection to thyristors, triacs, diodes, and multipule other solid-state components. It also protects heavy duty devices such as electrochemical rectifiers, heavy-duty power supplies with low I²t, as well as the protection of DC drives, UPS, Motor Drives, Inverters, heavy traction, and heavy-duty equipment.

Semiconductor Fuses

NH Type Square Body, Size NH000 to NH5. American, French and German Standards, DIN 43620, DIN 43653 IEC 269.1, 500VAC to 1300VAC. 500V/660V, 10A to 2000Amps, Size NH000 to NH5, DIN 43620 Fuses 690V/800V, 10A to 2000Amps, Size NH000 to NH5, DIN 43620 Fuses 690V/800V, 10A to 400Amps, Size NH000 to NH00, DIN 43653 Fuses 690V/800V, 10A to 400Amps, Size NH00, DIN 43653 Press-Pack Fuses 690V/800V, 40A to 1600Amps, Size NH1 to NH3, IEC 269.1 French Blade Fuses 690V/800V, 40A to 1600Amps, Size NH1 to NH3, DIN 43653, Blade Type DIN 80 & 110 Fuses 690V/800V, 40A to 1600Amps, Size NH1 to NH3, American Standard in Accordance with BS88 Fuses 690V/800V, 40A to 1600Amps, Size NH1 to NH3, IEC 269.1 & 4, Press-Pack Fuses 690V/800V, 1000A to 2000Amps, Size NH2x2-2 3, IEC 269.1 & 4, French Standard Fuses 1000V/1300V, 10A to 2000Amps, Size NH00 to NH5, DIN 43620, IEC 269.1 & 4, aR/gR Class Fuses 1000V/1300V, 40A to 1600Amps, Size NHl to NH3, DIN 43653, Blade Type DIN 110 Fuses 1000V/1300V, 40A to 1600Amps, Size NHl to NH3, American Standard in Accordance with BS88 Fuses 1000V/1300V, 40A to 1600Amps, Size NH1 to NH3, IEC 269.1 & 4, Press-Pack Fuses 1000V/1250V, 1250A to 2000Amps, Size NH2x3, IEC 269.1 & 4, French Standard Fuses

Semiconductor Technology Fuses (Ultra-Rapid /Fast Acting, 200KA IR, Current Limiting, High Interrupting Capacity with Superior DC Capabilities). American Standard (cylindrical design). Extending circuit protection to thyristors, triacs, diodes, and multipule other solid-state components. It also protects heavy duty devices such as electrochemical rectifiers, heavy-duty power supplies with low I²t, as well as the protection of DC drives, UPS, Motor Drives, Inverters, reduced voltage starters, heavy traction, and heavy-duty equipment.

Ferrule Cartridge / Midget Fuses

500V to l000V, 2A to 200Amps, Cartridge Fuses

Ferrule Semiconductor Protection Fuses for the protection of power semiconductors. Extremely High breaking capacity, low power dissipation, silver plated contacts, low switching voltage. Full range protection, and allows selective coordination.

Special Purpose Fuses

Cable Protectors (CP)

Cable Sizes
2, 1/0, 2/0, 4/0, 250kcmil, 350kcmil, 400kcmil, 500kcmil, 600kcmil, 750kcmil & 1000kcmil
Interrupting Rating
200KA
Mounting Types
(1) Cable to Cable, (2) Cable to Offset Bus, (3) Bus to Offset Bus, (4) Mole to Cable & (5) Mole to Offset Bus

Applications:

Cable Protectors for Underground Power Line Distribution. For Cables of Copper or Aluminum Materials. Very high interruption rating. Cable protectors are rated in terms of cable sizes and material (Al or Cu). Used for isolating faults quickly, increasing reliability of service entrance & distribution runs.

DC Fuses / Metro, Transit, Light Rail & Locomotive / Electric Vehicle / Photovoltaic Solar, Alternative Energy Applications

DC Fuses, designed for Direct Current operations. Current Limiting, used primarily in Metro and Transit, and Solar Photovoltaic applications.

DENCO Fuses (which used to be DenMar Transit Engineering) has a long history of designing and manufacturing metro/transit fuses and has also supplied Metros all around the world with many other metro/transit DC fuses in the past such as Semiconductor Devices, Traction Fuses for 3rd Rail Applications, Overhead Catinary, Auxiliary Power Distribution Fuses, Substations, Rectifier Fuses, 3rd Rail Feeders, Main Electrical Feed, Pantagraph Applications, Converter Protection, Protection of High Speed DC Breakers Fuses Line Charging Resistor Capacitor Fuse, Line Filter Capacitor Tray, Propulsion Blower Motor, Collector Shoe Fuses, and Distribution Equipment.

We also manufacture Photovoltaic fuses for Solar & Alternative energy.

Give us a call so that we can assist you in selecting the right DC current limiting fuses for your applications.

Special Custom Design AC or DC Fuses

Discontinued fuses and Specialty fuses for current limiting circuit protection. Custom made, one-off fuses to your specs and dimensions to fit your application. Just send us your requirements and we’ll manufacture a fuse suitable for your needs and requirements.

Our fuses can also be designed to your specifications.

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Custom and discontinued

Cable protectors, loadbreak elbow fuses and one-off designs are quoted directly. Send your specification or start a cross-reference.