
Jean Müller NH000 Fuse Link M000GL100 100A gG 500V for KETO-00 Switch-Disconnector
This is the NH blade-contact fuse link that goes inside the Jean Müller KETO-00 switch-disconnector to protect the DC run between the battery bank and the inverter. It is the part that actually acts: on a short circuit or a sustained overload it melts and opens the circuit, keeping cables, batteries and inverter out of trouble.
Size is NH000 and rated current 100A, with a gG operating class — the general-purpose curve that rides out the normal inrush of a storage system and clears real faults. Jean Müller rates it at AC 500V with a 120kA breaking capacity, 6,9W power dissipation at rated current and a combi indicator, so you can see at a glance which link has gone.
One point that matters when sizing a DC circuit: Jean Müller declares no rated DC voltage for gG fuse links. The catalogue rates them for AC only and, for DC applications, lists a separate family of special-purpose types rated from DC80V to DC440V. The 250V DC figure associated with this article is the limit of the KETO 00 switch, not a rated voltage of the link itself: suitability for DC has to be assessed on the holder-plus-link assembly, or by choosing a link that is declared for DC.
The KETO-00 switch takes two links, one on the positive pole and one on the negative, so a complete install needs a pair. Size them on the battery’s maximum charge and discharge current with a safety margin, not on the inverter’s rated current. Fitting is a job for a qualified electrician, to local wiring rules.
Key strengths
Technical specifications
| Feature | Value |
|---|---|
| Product code | N5014307-100A |
| Jean Müller article no. | N5014307 |
| Catalogue designation | M000GL100ISM |
| Manufacturer | Jean Müller |
| Type | NH blade-contact fuse link |
| NH size | NH000 |
| Rated current | 100A |
| Operating class | gG (general purpose, formerly gL) |
| Rated voltage | AC 500V (Jean Müller data) |
| Rated DC voltage of the link | Not declared: Jean Müller rates gG links for AC only and lists dedicated special-purpose types, from DC80V to DC440V, for DC applications |
| DC voltage | 250V DC (limit set by the KETO 00 switch, Jean Müller data) |
| Breaking capacity | 120kA (Jean Müller data) |
| Power dissipation at rated current | 6,9W (Jean Müller data) |
| Blown-fuse indicator | combi indicator, visible from the front |
| Matching fuse holder | Jean Müller KETO-00 switch-disconnector |
| Standards | IEC/EN 60269-1, DIN VDE 0636-2 |
| Weight | 0,17kg |
| Source of the technical data | Figures declared by Jean Müller, NH fuse-link catalogue |