SIBA NH Low Voltage Fuses: European Knife-Blade Fuse System

In industrial power distribution, circuit downtime is often a consequence of inadequate fuse selection or aging protection systems. SIBA NH Low Voltage Fuses provide a high-interrupting capacity (120 kA) solution designed to meet rigid European safety standards, ensuring reliable cable, motor, and transformer protection in facilities worldwide.

Product Overview

The SIBA NH knife-blade fuse system is a versatile protection platform available in sizes 000 through 4a. Featuring both top and center combination indicators for immediate fault identification, these fuse-links are manufactured with corrosion-resistant materials and offer specialized operating classes (gG, aM, gTr) to match specific inductive or resistive load requirements from 400V up to 1500V AC.

Typical Applications

  • Industrial Power Distribution Boards
  • Motor Circuit Short Circuit Protection
  • Step-up/Step-down Transformer Secondary Protection
  • Main Incoming Cabinet Protection for Facilities Management

Key Features & Benefits

  • High Interrupting Rating: Tested up to 120 kA for extreme fault current management.
  • Combination Indicators: Dual visual signals (top/center) facilitate rapid maintenance troubleshooting.
  • Multiple Operating Classes: Tailored trip characteristics for general use (gG), motor (aM), and transformer (gTr) loads.
  • Safety Options: Available with metal or insulated removal tags to suit specific safety protocols.

SIBA NH Selection Guide: gG General Purpose

NH gG Series — Metal Removal Tags

500V AC • Cable & Line Protection • 120kA Interrupting Rating

Catalog Number Size Indicator Voltage Action
20 000 13 000 Combi 500V REQUEST QUOTE
20 001 13 00 Combi 500V REQUEST QUOTE
20 002 13 0 Combi 500V REQUEST QUOTE
20 003 13 1 Combi 500V REQUEST QUOTE
20 004 13 2 Combi 500V REQUEST QUOTE
20 005 13 3 Combi 500V REQUEST QUOTE
20 006 13 4 Top 500V REQUEST QUOTE
20 120 13 4a Top 500V REQUEST QUOTE

→ Continued: Specialized aM, gTr, and gTF Series

NH aM Series — Motor Circuit Protection

690V AC • Partial Range Protection • Short Circuit Only

Catalog Number Size Indicator Voltage Action
20 477 08 000 Combi 690V REQUEST QUOTE
20 209 08 00 Combi 690V REQUEST QUOTE
20 211 08 1 Combi 690V REQUEST QUOTE
20 212 08 2 Combi 690V REQUEST QUOTE
20 213 08 3 Combi 690V REQUEST QUOTE
20 227 08 4a Top 690V REQUEST QUOTE

NH gTr/gTF — Transformer & High Voltage

400V - 1500V • Specialized Inductive Load Protection

Catalog Number Size Class Voltage Action
20 004 15 2 gTr 400V REQUEST QUOTE
20 005 15 3 gTr 400V REQUEST QUOTE
20 246 02 3 gTF 1500V REQUEST QUOTE

→ Continued: NH Fuse Bases, Links, and Accessories

NH Knife-Links & Disconnects

Standard Neutral & Solid Links • DIN 43620 Compliant

Catalog Number Size Type Tags Action
24 001 02 00 Solid Link Metal REQUEST QUOTE
24 080 02 00 Solid Link Insulated REQUEST QUOTE
24 003 02 1 Solid Link Metal REQUEST QUOTE

NH Fuse Bases (690V Standard)

1-Pole Ceramic Supports • Steel Base Plate

Catalog Number Size Current Standard Action
21 001 01 00 160A DIN 43620 REQUEST QUOTE
21 003 01 1 250A DIN 43620 REQUEST QUOTE
21 005 01 3 630A DIN 43620 REQUEST QUOTE
Standard: IEC 60269-1-2 / EN 60269-1-2  |  Rating: 120 kA Interrupting Rating  |  Class / Category: NH Knife-Blade System (000 - 4a)

Ensuring correct NH fuse selection requires precise electrical specification. Contact our technical team for assistance with current ratings, time-current curves, and mounting configurations.

REQUEST A QUOTE
Back to blog