111 Portulaca St.
Lake Jackson, TX 77566
Call: (979) 285-9092


Altech fuses

Rely on the Altech's extensive inventory of European Fuses and our fast delivery service.

Line, Motor Protection
Overload and short-circuit protection in a wide range of fuse sizes from 2 to 1600A.

Line Protection
Operating Classes gI/gF, gL/gG

Slow Blow
Operating Classes gL/gGFast Blow

Motor Protection
Operating Class aM

  • Miniature
  • Diazed ("Bottle Fuse"), Neozed
  • NH - Knife Blade (Size 00 up to 4A)
  • Cylinder
  • British
  • Italian
  • High Voltage
Semiconductor Protection
Current limiting semiconductor fuses with extremely fast acting trip characteristics to protect SCRs, diodes, etc.

Full Range Short Circuit and Overload Protection
Operating Class gR

Partial Range Short Circuit Protection
Operating Class aR

  • Diazed ("Bottle Fuse"), Neozed
  • Cylinder
  • NH - Knife Blade
  • NH - Stud Mount
  • Square Body

MINIATURE

Miniature Fuses are typically used to protect electronic devices, laboratory and measurement instruments, stereos, TVs, VCRs etc. They are available in four sizes with a current range of 20mA to 20 Amps.

Miniature Fuses are manufactured according to VDE 0820 part 1, VDE 0820 part 2, IEC publication 127, CEE publication 4 and actual DIN standards.

  • Slow
    Typical Marking: T
  • Medium
    Typical Marking: M
  • Fast
    Typical Marking: F
  • Super Fast
    Typical Marking: FF

DIAZED (BOTTLE)

Diazed Fuses, commonly called "Bottle" Fuses, are available in five sizes, ND to 35 Amps, DII to 35 Amps, DIII to 100 Amps, DIV to 100 Amps and DV to 200 Amps. Fuse accessories are sized to match. Each size fuse body has a different diameter to fit only into the appropriate Screw Cap and Fuse Base.

Also, the fuse tips have different diameters, depending on their current rating. The diameter of the tip matches the diameter of the hole in the Adapter Screw to insure that no fuse with a higher rating than intended for the circuit can be installed. This prevents damage to the circuit or equipment the fuse protects. Additionally, fuses and Adapter Screws are color coded to avoid mismatching; for example: 10 Amp Diazed fuses have red pop-out indicators on their head, matching the red ring of the 10 Amp Adapter Screw.

When a Diazed fuse has blown, the color coded indicator on the head of the fuse will pop out, giving visible indication through a glass window in the Screw Cap.

The Fuse is held in place by the Screw Cap, which is screwed into the Fuse Base. Diazed Fuse Bases are available in one and three pole designs. Fuse Bases can be panel mounted or snapped onto a standard 35mm DIN rail.

Operating Classes

  • gL/gG - Slow Blow
    Protect cable, equipment, and conductors from damage due to overloads and short circuits.
    Typical Markings: T, Trage, gL/gG, Vollschutz,
  • Fast Blow fuses are typically used to protect equipment.
    Typical Markings: F, Flink, (the absence of the snail symbol)
  • gR - Semiconductor Protection
    Typically used for protecting semiconductors like diodes, SCRs, etc. Current limiting.
    Typical Markings: Ultra Rapid, Ultra Quick, Silized, Recticur, gR,
    Mostly red, orange, or blue imprint.

NEOZED

Neozed Fuses are more compact than the Diazed Fuses. Three sizes are available, D01 to 16 Amps, D02 to 63 Amps and D03 to 100 Amps. Fuse accessories are sized to match. Each size fuse body has a different diameter to fit only into the appropriate Screw Cap and Fuse Base.

Also, the fuse tips have different diameters, depending on their current rating. The diameter of the tip matches the diameter of the hole in the Adapter Ring to insure that no fuse with a higher rating than intended for the circuit can be installed. This prevents damage to the circuit or equipment the fuse protects. Additionally, fuses and Adapter Rings are color coded to avoid mismatching; for example: 10 Amp Neozed fuses have red pop-out indicators on their head, matching the red 10 Amp Adapter Ring.

When a Neozed fuse has blown, the color coded indicator on the head of the fuse will pop out, giving visible indication through a glass window in the Screw Cap.

The Fuse is held in place by the Screw Cap, which is screwed into the Fuse Base. Neozed Fuse Bases are available in one and three pole designs. Fuse Bases can be panel mounted or snapped onto a standard 35mm DIN rail.

Operating Classes

  • gL/gG - Slow Blow
    Protect cable, conductors, and equipment from damage due to overload and short circuits.
    Typical Markings: gL/gG
  • gR - Semiconductor Protection
    Protects semiconductors like diodes, SCRs, etc. Current limiting super fast blow characteristic for short circuit protection.
    Typical Markings: Ultra Rapid, Ultra Quick, Recticur, gR,
    Mostly red, orange, or blue imprint.

CYLINDER

Cylinder Fuses are typically used in industrial applications to protect electrical devices such as motors, drives, etc.

They are available in four sizes with a current range from 1 to 125 Amps. Cylinder Fuses have metal caps at both ends, and a porcelain fuse body.

Operating Class

  • gI / gF - Line Protection
    Slow Blow, typically used for power distribution and resistive loads.
    Typical Markings: gI, gF
  • aM - Motor Protection
    Fast acting short circuit protection, but slow acting overload protection.
    Typical Marking: aM
    Green imprint.
  • gR - Semiconductor Protection
    Typially used for protecting semiconductors like diodes, SCRs etc. Current limiting, super fast blow.
    Typical Markings: Ultra Rapid,
    Ultra Quick, ProtisterTM, gR,
    Mostly red or blue imprint.

CYLINDER
with Bolt Tabs
for Semiconductor Protection

Bolt tab cylinder fuses are typically used for protecting semiconductors like diodes, SCRs, etc. They are current limiting, super fast blow fuses in the gR operating class.

They are available in two diameters with multiple fixing centers. The fuses have a porcelain body, metal caps at both ends, and bolt tabs.

NH KNIFE BLADE

NH fuses are typically used for power distribution applications and to protect large electrical devices such as motors, drives, etc. They are available in seven sizes with a current range of 2 to 1600 Amps.

NH fuses have knife blades at both ends, which mount into Fuse Bases. Fuse Bases are available in one or three pole designs and can be panel or DIN rail mounted.

Operating Classes

  • gL/gG - Line Protection
    Slow, typically used for distribution circuits or resistive loads.
    Typical Marking: gL/gG
  • aM - Motor Protection
    Fast acting short circuit protection, but slow acting overload protection.
    Typical Marking: aM
    Green imprint.
  • aR - Semiconductor Protection
    Partial range, short circuit protection for devices such as diodes, SCRs, etc.
    Typical Markings: Ultra Rapid, Sitor, Silcu, Protistor, Recticur, Ultra QuickTM, aR,
  • gR - Semiconductor Protection
    Full range overload and short circuit protection for devices such as diodes, SCRs, etc.
    Typical Markings: Ultra Rapid,
    Sitor, Silcu, Protistor,
    Recticur, Ultra QuickTM , gR,
    Mostly red, orange or blue imprint.

NH STUD MOUNT
Semiconductor

Semiconductor Fuses have extremely fast acting trip characteristics and provide short circuit and overload protection for diodes, SCRs etc. Current limiting, super fast blow.

Semiconductor Fuses offered comply with IEC, DIN and VDE standards and are available in two trip characteristics, definded below.

Operating Classes
(VDE 0636 / IEC 269)

  • gR - Full Range Protection
    Overload and short circuit protection.
    Typical Markings: Ultra Rapid, Silcu, Recticur, Protistor, Ultra QuickTM, gR
  • aR - Partial Range Protection
    Short circuit protection only. Faster acting than full range fuses.
    Typical Markings: Ultra Rapid, Silcu, Recticur, Protistor, Ultra QuickTM, aR
    Mostly red, orange, or blue imprint.

ITALIAN

Cylinder Fuses to Italian standards are typically used for machinery imported from Italy.

They are available in four sizes with a current range from 2 to 100 Amps. These fuses have metal caps at both ends, a ceramic body, and a blown fuse indicator.

  • Operating Class
    (IEC269 / CEI 32)
  • gl - Line Protection
    Slow Blow, typically used for power distribution or resistive loads.
    Typical Marking: gl

BRITISH

British fuses are typically used for industrial and general applications to protect cable and motor circuits. They are available with four different mounting plates. The most common sizes are shown here. Please consult Altech if you require sizes not listed.

Operating Class
(IEC 269 / BS 88)

  • gG - Line Protection
    Typically used for cable and motor circuits.
    Typical Marking: gG / Q1

BRITISH
SEMICONDUCTOR

British Semiconductor fuses are typically used for industrial applications to protect semiconductors like diodes, SCRs, etc.

They are available in single and double body units with multiple diameters and fixing centers. The fuses have mounting tabs for bolt mounting.

Operating Class
(IEC269/BS88:4)

  • aR - Semiconductor Protection
    Partial Range, short circuit protection.

SQUARE BODY
Semiconductor

Square Body Fuses provide short circuit protection for semiconductor devices such as diodes, SCRs, etc.

Square Body Fuses are available in three sizes with threaded holes in the metal end caps. They can be supplied with a Flap Indicator or a Center Indicator for visual trip indication. The Center Indicator has a provision for mounting an Adapter and Microswitch for remote indication.

Semiconductor Fuses offered comply with IEC, DIN and VDE.

Operating Class

  • aR - Partial Range Protection
    (VDE 0636 / IEC 269) Short circuit protection only.
  • Typical Markings: Ultra Rapid,
    Silcu, Protistor, aR
  • Mostly red, orange, or blue imprint.

HIGH VOLTAGE

High Voltage Fuses are typically used in distribution circuits and can be used for indoor or outdoor applications. They are available in four lengths and four different voltage ranges. Fuses supplied standardly with Striker Pins.

Example: 3 / 7.2KV High Voltage Fuses can be used on systems that operate on 3KV Voltage to 7.2KV Voltage. (3KV is the lower rated voltage and 7.2KV is the higher rated voltage.)

The High Voltage Fuses offered comply with IEC, DIN and VDE. Please consult Altech for 3 / 3.6KV, 17.5KV Fuses and also for High Voltage fuses which comply with BS 2692 and FSI 12-8 standards.

(IEC 282-1 / VDE 0670)

ACCESSORIES

DIAZED AND NEOZED

  • Screw Cap
  • Adapter Screw / Ring
  • Fuse Base
  • Fuse Base Cover
  • Tools

CYLINDER FUSE BASES

NH FUSE

  • Fuse Base
  • End Plate
  • Terminal Cover
  • Microswitch
  • Fuse Handle

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