RO30A NH00C gG HRC Knife‑Blade Fuse Link, Compact Size for MCC & Switch Cabinet Circuit Protection
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The MIRO RO30A NH00C compact square‑tube knife‑blade HRC fuse link features overall dimensions of 120 × 53 × 35 mm. It belongs to gG general‑purpose utilization category for cable and circuit protection. Compliant with IEC 60269‑2 and GB/T 13539.2 standards, rated AC 500V/690V. Breaking capacity reaches 120kA at 500V and 50kA at 690V, current range covers 6‑125A. Compact plug‑in knife‑blade design fits all NH00C series fuse bases for fast replacement. Widely used in low‑voltage MCC motor control centers and compact industrial power distribution cabinets.
Date sheet
MIRO RO30A (NH00C) measures 78 × 49 × 48 mm, it is a gG category knife‑blade fuse link, rated voltage 500V/660V, breaking capacity up to 120kA at 500V and 50kA at 690V, current range 4‑100A, square‑tube knife‑blade plug‑in installation.
This product is fully matched with mainstream international brands in electrical performance and installation dimension for direct replacement, no cabinet or base modification required:
- Replaceable for Mersen NH00C gG series with identical voltage, breaking capacity and dimension, directly compatible with original fuse base;
- Interchangeable with Eaton NH00C series, same gG utilization category and universal plug‑in structure;
- Direct substitute for Littelfuse NH00C‑Style knife‑blade fuse, identical electrical parameters and physical dimension for seamless retrofit;
- Replacement for Siemens 3NA2 series, fits existing switchgear without mechanical alteration;
- Drop‑in alternative for Bussmann NHG00C‑690 fuse with equivalent protection performance.
Application scenario: Overload and short‑circuit protection for cables and circuits in motor control centers(MCC), compact low‑voltage cabinets and industrial power distribution systems.
low‑voltage cabinets and industrial power distribution systems.
| parameter | value | Test standard/ method |
|---|---|---|
| Frequency | 45－62Hz | Adopt network analyzer for testing |
| Voltage | 500V/690V | Voltmeter |
| Current | 16A,20A,25A,32A,40A,50A,63A,80A,100A | Ammeter, clamp meter |
| Breaking capacity of a fuse-link | 500V/100kA 690V/50kA | Type test |
| Utilization category(of a fuse link) | aR | GB 13539.1-2008 GB/T 13539.4-2009 |
| Installation method | Square tube knife plug-in type | - |
| Others | - | - |
PRODUCTS SIZE:
| Parameter | Value | Test standard/method |
|---|---|---|
| Frequency | 45‑62Hz | Test by network analyzer |
| Rated working Voltage | 500V/690V | Voltmeter |
| Rated working Current | 500V: 2A,4A,6A,8A,10A,16A,20A,25A,32A,40A,50A,63A,80A,100A 690V: 2A,4A,6A,8A,10A,16A,20A,25A,32A,40A,50A,63A | Ammeter, clamp meter |
| Power dissipation of a fuse‑link | 12W max | Millivoltmeter |
| Breaking capacity of a fuse‑link | 500V/100kA 690V/50kA | Type test |
| Utilization category of a fuse‑link | gG | GB 13539.1‑2015 GB/T 13539.2‑2015 |
| Installation method | Square‑tube knife‑blade plug‑in type | ‑ |
Applications
Protection against overload and short-circuit in electric lines (type gG), also available for protection of semiconductor parts and equipments against short-circuit (type aR) and protection of motors (type aM).
Design Features
Variable cross-section fuse element made from pure copper or silver sealed in cartridge made from high-duty ceramic; Fuse tube filled with chemically treated high-purity quartz sand as arc extinguishing medium. Dot-welding of fuse element ends to the terminals ensures reliable electric connection and forms insert knife type contacts. Indicator or striker may be attached to the fuse link to show cutout of fuse or to give various signals and to cut the circuit automatically.
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