NH DIN 43620 Knife Fuse-Links: gL/gG, gB, gTr and aM
DENCO's German-style NH knife fuse-links to DIN 43620 come in four utilization categories: gL/gG for cable and wire protection, gB for mining, gTr for transformer protection and aM for motor circuit protection. gL/gG and gB use body sizes 00, 0, 1 and 2. gTr uses sizes 2, 3 and 4. All carry a visual indicator.
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Voltage depends on category. The gL/gG and aM fuse-links are rated 500V / 660V / 690V, the gB mining fuse-links 500V and the gTr transformer fuse-links 400V. Each category page prints a time-current curve conforming to VDE 0636/21, a peak let-through curve and a dimension table (a1, a2, a3, b, c1, d, e1, e2, e4). The gL/gG curves are drawn according to NBR IEC 60269-2-1 and DIN 43620 parts 1 to 4.
The overview on p.89 adds two DIN 43620 lines: 500V / 690V fuses from 10A to 2000A in sizes NH000 to NH5 equipped for a microswitch, and 690V / 800V fuses from 10A to 2000A in sizes NH000 to NH5 with a pin indicator.
Specifications
| Parameter | Value |
|---|---|
| gL/gG cable and wire | Body sizes 00, 0, 1, 2; 500V / 660V / 690V |
| gB mining | Body sizes 00, 0, 1, 2; 500V |
| gTr transformer | Body sizes 2, 3, 4; 400V |
| aM motor circuit | 500V / 660V / 690V |
| DIN 43620, microswitch-equipped | 500V / 690V, 10A to 2000A, NH000 to NH5 |
| DIN 43620, pin indicator | 690V / 800V, 10A to 2000A, NH000 to NH5 |
Construction and options
- Visual indicator
- High breaking capacity
- Low power dissipation
- High current limiting
- Silver plated contacts
- Low switching voltage
- Silver element (gB, gTr, aM)
- Knife type per DIN 43620
Applications
- Cable and wire protection (gL/gG)
- Mining application (gB)
- Transformer protection (gTr)
- Motor circuit protection (aM)
Standards and equivalents
- According to DIN / IEC / VDE
- Standards listed: IEC 60269-1-2, EN 60269-1-2, DIN 43620/1, DIN 43653, BS 88, VDE 0636/22, SEM 2810, VDE 0636 part 2011, OVE-SN40, SEV 1066
- Time-current curves conforming to VDE 0636/21
- gL/gG time-current curves according to NBR IEC 60269-2-1, DIN 43620 parts 1-4
Wording is the catalog’s own. “In accordance with” a standard is not the same as certified or listed to it.
Curves and drawings
The catalog prints the following for this series: time-current curve per category (gl/gg, gb, gtr, am), peak let-through curves, dimension tables. This series is on pp.89, 91–94 of the January 2025 DENCO catalog. Access the catalog or ask for the drawing or curve you need.
Technical review
Specifications on this page are quoted from DENCO’s product catalog. Confirm any rating against DENCO engineering before specifying.
Related
- Type NH Square Body Fuses & Bases: the full family
- NH fuse bases and microswitch accessories
- All fuse product families
- Cross-reference and discontinued replacement
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