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European and Japanese Fuses --
From USA Stocks

An Overview

When your equipment is down because a fuse has blown, you need a replacement fast! Maryland Metrics can help. With our access to an extensive stock of European and Japanese fuses, we can get the needed fuse to you in a hurry.

We have access to a large inventory of fuses from various manufacturers. If needed, we can cross reference your parts, and get replacements quickly. Our knowledge is built from years of experience in the metric industry. We use that knowledge to locate the correct part for your application, to get you out of trouble fast.

You may already be familiar with Maryland Metrics from some of our other activities. We offer all types of Metric Sized mechanical, electrical, and electromechanical products such as terminal blocks, circuit breakers, nonmetallic enclosures, relays, mounting hardware and other control devices which are used extensively in control, protection, power distribution and automation applications.

Maryland Metrics fuse products represent "state-of-the-art" electrical and electronic technology. They meet diverse international and national electrical standards, such as IEC, UL, CSA, JIS, etc.

These products are advantageous to any company that is interested in upgrading their devices, machinery and equipment to meet world standards, and to save space and assembly time as well!

Maryland Metrics has been offering Metric sized fasteners and replacement parts for European and Japanese equipment since we started in 1971.

Most European and Japanese fuses offered meet IEC, DIN, VDE, JIS and other European and Japanese standards. Many European fuse types are standardized, reducing stocking requirements. For example, Diazed (commonly called "Bottle" ) Fuses of any brand are interchangeable between brands for the same type and size.


  EUROPEAN FUSE TYPE DESCRIPTIONS -- GENERALIZED
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DIAZED (BOTTLE) FUSES     diazed.gif

Diazed Fuses, commonly called "Bottle" Fuses, are available in five sizes, ND to 25 Amps, DII to 25 Amps, DIII to 63 Amps, DIV* to 100 Amps and DV * to 200 Amps. Fuse accessories are sized to match these five sizes. 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 and conductors from damage due to overloads and short circuits. Typical Markings.-'T', Trage, gl/gG, snail symbol

- Fast Blow Fast Blow fuses are typically used to protect equipment.

Typical Markings.- "F, Flink, (the absence of the snail symbol)

gR - Super Fast Blow Typically used for protecting semiconductors like diodes, SCRS, etc. Current limiting.

Typical Markings.- UtraRapid ™, Silzed ™, Recticur™, gR,

*'For DIV/DV fuses, please consult us


 

NEOZED FUSES     neozed.gif

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 these three sizes. 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 and conductors from damage due to overload and short circuits.

Typical Markings: gl/gG

gR - Super Fast Blow Protects semiconductors like diodes, SCRS, etc. Current limiting super fast blow characteristic for short circuit protection.

Typical Markings: Ultra Rapid™, Recticur™, gR,


 

CYLINDER FUSES    cylndr.gif

Compact 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 100 Amps. Cylinder Fuses have metal caps at both ends that assure positive contact.

Operating Class

gl -Line Protection Slow Blow, typically used for power distribution or resistive loads.

Typical Markings: gl aM - Motor Protection Fast acting short circuit protection, but slow acting overload protection.

Markings: aM

gR - Semiconductor Protection Typically used for protecting semiconducors like diodes, SCR's etc. Current limiting, super fast blow.

Typical Markings: Ultra Rapid ™, gR,


 

NH FUSES     nhfuse.gif

NH fuses are typically used for distribution applications and to large electrical devices such as motors, drives, etc. They are available in seven sizes with a current range of 3 to 1600 Amps.

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

Operating Classes gL/gG - Line Protection Slow, typically used for distribution circuits or resistive loads.

Typical Markings: gl/gG

aM - Motor Protection Fast acting short circuit protection, but slow acting overload protection. Typical Markings: aM

aR - Semiconductor Protection Partial range, short circuit protection for devices such as diodes, SCRS, etc.

Typical Markings: Ultra Rapid ™, Silcu ™, Sitor ™, Recticur ™,Protistor ™, aR,

gR - Semiconductor Protection Full range overload and short circuit protection for devices such as diodes, SCRS, etc.

Typical Markings: Ultra Rapid ™, Silcu ™, Sitor ™, Recticur ™, Protistor ™, gR,


 

SEMICONDUCTOR FUSES -- OVERVIEW

SEMICONDUCTOR FUSES     semicon.gif


Maryland Metrics offers Semiconductor Fuses
in several types:

Current limiting Semiconductor Fuses have extremely fast acting trip characteristics and provide short circuit and overload protection for diodes, SCR's, etc.

The Semiconductor Fuses offered comply with IEC, DIN and VDE standards. They are available in two super fast characteristics.

Operating Classes

gR - Full Range Protection Overload and short circuit protection.

Typical Markings: Ultra Rapid ™, Silized ™, Silcu ™, Sitor ™, Recticur ™, Protistor ™, gR,

aR - Partial Range Protection Short circuit protection only. Faster acting than full range fuses.

Typical Markings: Ultra Rapid ™, Silized ™, Silcu ™, Sitor ™, Recticur ™, Protistor ™, aR,

SEMICONDUCTOR FUSES

Space saving, compact Square Body Fuses provide short circuit protection semiconductor devices such as diodes, SCR'S, etc. Fuses with knife blades are typically used in high power applications of 80 to 1OOOA at 660 or 1OOOV. Square Body Fuses are available in three sizes with knife blades in two fixing lengths, 80mm (3.15 in) and 11Omm (4.33 in.). 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. The Semiconductor Fuses offered here 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,

SEMICONDUCTOR FUSES

Space saving, compact Square body Fuses provide short circuit protection or semiconductor devices such as diodes, SCR'S, etc.

Square Body Fuses are available in three sizes with knife blades in two fixing lengths, 80mm (3.15 in.) and 110mm (4.33 in.). 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.

The Semiconductor Fuses offered here 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 ™

SEMICONDUCTOR FUSES

Space saving, compact Square Body Fuses provide short circuit protection for semiconductor devices such as diodes, SCR'S, 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.

The Semiconductor Fuses offered here comply with IEC, DIN and VDE.

Operating Class aR - Partial Range Protection (VDE 0636 / IEC 269)

SEMICONDUCTOR FUSES

Semiconductor Fuses have extremely fast acting trip characteristics and provide short circuit and overload protection for diodes, SCR's etc. They are current limiting with a super fast blow.

The Semiconductor Fuses offered comply with IEC, DIN and VDE standards. They are available in two super fast characteristics.

Operating Classes (VDE 0636 / IEC 269) gR - Full Range Protection Overload and short circuit protection. Typical Markings: Ultra Rapid ™, Silcu ™, Recticur ™, Protistor ™, gR,

aR - Partial Range Protection Short circuit protection only. Faster acting than full range fuses. Typical Markings: Ultra Rapid ™, Silcu ™, Recticur ™, Protistor ™, aR,


 

FUSE ACCESSORIES     fusaccs.gif

SCREW CAPS

The Screw Cap types offered fit the various fuse and Fuse Base sizes. They hold the fuses in place and connect the head of the fuse with the load side of the Fuse Holder. The colored blown fuse indicator on the head of the fuse is clearly visible through a small window in the top of the Screw Cap. A small test hole on the side of the Cap allows for a probe to test it voltage is present on the metallic surface or the end of the fuse.

ADAPTER SCREW / RING

Adapter Screws are used with the Diazed, and Adapter Rings are used with the Neozed systems. They are available in diameters to fit the various Fuse Bases. Adapter Screws are porcelain rings with a center hole on one side, a threaded stud on the other and one notch on each side. The inside diameter of the center hole of the Adapter Screw matches the diameter of the tip of the Diazed fuse for which it is intended. This helps to eliminate the insertion of fuses with higher current ratings than allowed. The integral threaded stud installs into the appropriate Diazed Fuse Base. Adapter Screws and Rings are color coded to the fuses.

FUSE BASES

Fuse Bases hold fuses in place (in conjunction with the Screw Cap) and insure proper electrical connections. They snap easily onto standard DIN rail or can be panel mounted. They are available in one or three pole designs. Matching Covers are available. The line is connected to the metal tab at the bottom of the fuse base. The load is connected to the metal ring into which the Screw Cap is installed.

FUSE BASE COVERS

Fuse Base Covers are available in one and three pole designs to match the Fuse Bases we offer. They help prevent shock from accidental touching of conducting metal parts on the Base.

TOOLS (not illustrated)

The Adapter Screw / Ring Tools aid in the insertion and removal of the Adapters from the Fuse Base. The Adapter Screw Tool fits into notches on the Adapter Screw for the D27 and D33 Diazed fuses. The Adapter Ring Tool fits the Adapter Rings for the D01, D02 and D03 Neozed fuses. We strongly recommend these tools be used when inserting or removing Adapter Screws or Rings to prevent electrical shocks.


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