Our Fuses

Excellence in Manufacturing Quality Fuses for over 30 years

Five Segments.
One Mission.

DENCO Fuses covers five of the most important segments in electrical protective devices; North American Power Fuses, Medium / High Voltage Distribution Fuses, International Fuses, Ultra-Rapid Semiconductor Fuses and Special Purpose Fuses.

High quality fuses

Our factory utilizes state-of-the-art German technology and has over 50 years of experience manufacturing fuses. With our customer loyalty program, we continue to decrease delivery times while increasing customer satisfaction. DENCO Fuses has been incorporated in the state of Florida since 1988.

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North American Power Fuses

Not only do we manufacture the normal standard electrical fuses, we also work with utility companies, transformer manufacturers, private companies and manufacturers, as well as transportation companies to protect their circuit grid.

Because of the high-quality materials and craftsmanship in our fuse products, our Class L, Class J, Class RK1 Fuses, RK5, and K5 fuses run longer, cooler, and safer than other options.

For all of your electric fuse needs, DENCO Fuses provides durable products and honest, helpful service.

CLASS L FUSES

Class L Fuses

• Voltage: 600VAC, 300VDC
• AC Amperages: 400A to 6000A
• DC Amperages: 400A to 2500A
• Interrupting Rating: 200KA AC, 100KA DC
• Fast Acting & Time Delay

Applications:

High Interrupting Rating, Current Limiting Fuse for Busbar Mounting Protection.

Ideally suited for protecting Mains, Feeders, Circuit Breakers, Load Centers, Panelboards, Metering Centers, Switchboards and general circuits. Our Time Delay fuses are ideal for large motors and any other loads with high inrush.

UL / CSA Standard protection against short circuit.

Class J Fuses

• Voltage: 600VAC, 300VD
• AC Amperages: 1A to 600A
• DC Amperages: 1A to 600A
• Interrupting Rating: 200KA AC, 100KA DC
• Fast Acting & Time Delay

Applications:

Class J fuses are designed with special dimensions to prevent the substitution of other fuses with lower voltage ratings, interruption ratings, or current limiting capability.

High Current Limiting for low peak let-thru current. Designed for Capacitors, Load Centers, Panelboards, Switchboards, Bus Duct, Feeder Circuits, Circuit Breakers, Lighting, Heating, and General Loads.

UL / CSA Standard protection against short circuit.

Class RK1 Fuses, RK5, & K5 Fuses

• Voltage: 250VAC & 600VAC
• Amperages: 1A to 600A
• Interrupting Rating: 200KA
• Fast Acting & Time Delay

Applications:

Class RK1, RK5, and K5 Fuses, available in Fast Acting and Time Delay. High Interruption Rating, Current Limiting Fuse. Popular for Motor Circuit Protection.

Current limiting time delay fuses are designed and engineered for over-current protection of motors and transformers, service entrance equipment, feeder, branch circuits, and general purpose protection. They also safely handle all harmless starting currents and inrush currents associated with motors and transformers.

UL / CSA Standard protection against short circuit.

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.

We guarantee our fuse products and perform in-house testing at our factory lab. Our testing makes sure that your medium voltage or high voltage fuses function efficiently and safely.

CLASS L FUSES

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

Applications:

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

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

• 2.5KV, 1R to 36R (35A-650Amp) Fuses
• 4.8KV 2R to 36R (70A-650Amp) Fuses
• 7.2KV 2R to 24R (70A-450Amp) Fuses

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.

Applications:

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

• AC Voltage: 1000V, 1.5KV, 2.5KV, 3KV, 4.3KV, 5.5KV, 8.3KV, 15.5KV, 23KV, 27KV & 38KV
• Amperages: 1C to 200C, 1A to 200A
• Interrupting Rating: 40KA, 50KA, 60KA, 65KA & 80KA
• With or Without Blown Fuse Indicator.
• Designed to ANSI C37-41 Specs.

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.

Applications:

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.

Applications:

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

• AC Voltage: 250V, 300V, 450V, 550V, 690V & 1000V
• Amperages: 2A to 600A
• Interrupting Rating: 200KA & 300KA
• Designed to IEC 269.4, IEC 33, VDE 636-23, DIN 43653 & BS 88-4 Specs.

• 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

Applications:

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.

 

CLASS L FUSES

Type NH Square Body Fuses

• AC Voltage: 500V /660V, 690V /800V, 1000V /1300V & 1000V /1250V
• Amperages: 2A to 2000A
• Interrupting Rating: 80KA & 120KA
• Sizes: NH000, NH00, NH0, NH1, NH2, NH3, NH4 & NH5
• Design Type: German Standard, French Standard, American Standard & Press-Pack
• With or Without Visual Trip Indicator or Microswitch
• Designed to DIN 43620, IEC 60269, DIN 43653, DIN 80, DIN 110, VDE 0636, BS 88 Specs.

• 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

Applications:

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

• AC Voltage: 7.2KV, 8.3KV, 17.5KV, 24KV & 36KV
• Amperages: 2A to 400A
• Sizes: 192mm, 292mm, 442mm & 537mm
• Designed to DIN 43625, IEC 282-1, VDE 0670, EN 60644, IEC 60282-1, IEC 60644, IEC 60787 & ANSI C37 Specs.

• 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

Applications:

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

CLASS L FUSES

Semiconductor Fuses / Form 101

• Voltages: 130V, 250V, 500V, 600V, 700V, 1000V, 1200V & 1500V
• Amperages: 1A to 2000A
• Interrupting Rating: 200KA AC & 100KA DC
• Indicator options available

UL / CSA Standard protection against short circuit.

• 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

Applications:

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

• Voltages: 500V/660V, 690V/800V, 1000V/1300V & 1000V/1250V
• Amperages: 1A to 2000A
• Interrupting Rating: 200KA AC & 100KA DC
• Indicator options available

 •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

Applications:

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

• Voltages: 220V /500V, 220V /660V, 220V /750V & 220V /600V
• Amperages: 2A to 200A
• Interrupting Rating: 200KA, 100KA, 17KA  90KA
• Sizes: 10×38, 14×51, 22×58, 27×60, 20×76, 20×127 (millimeters)
• Indicator options available
• Designed to IEC 269.1 & 4, VDE 636-23 & IEC 269.4 Specs.

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

Application:

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.

CLASS L FUSES

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

Applications:

DC Fuses, designed for Direct Current operations. Current Limiting, used primarily in Metro and Transit, Solar Photovoltaic applications and now (EV) Electric Vehicles.

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 Electric Vehicle fuses for automobile manufacturers as well as 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

Applications:

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.

 

Contact Us

Office

Miami, FL 33173

Call Us

Main: +1 (305) 273.6226
Toll-Free: 1.800.305.FUSE (3873)

Fax

+1 (305) 273.4335

Quality assured by ISO 9001:2015 Standards.
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