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MERSEN FUSE MICRO POUR BASE NH-2 UN POLE MSBB21
Mersen J222487 MSBB21 microswitch accessory for compatible single-pole NH2 fuse bases, rated at 250 V AC and 10 A for remote fuse-status indication.
£21.26
Why Choose the Mersen J222487 Microswitch for NH2 Fuse Bases?
The Mersen J222487, also identified as MSBB21, is a dedicated microswitch accessory for compatible single-pole NH size 2 fuse bases. It is designed to provide remote fuse-status indication when used with an appropriate NH fuse-link equipped with a striker mechanism.
When the installed fuse-link operates, its striker actuates the microswitch, allowing the change in fuse status to be communicated to an alarm circuit, indicator, PLC or supervisory control system. The switch can also indicate when no compatible fuse-link is installed, helping engineers identify an open or incomplete fuse circuit more quickly.
Rated at up to 250 V AC and 10 A, the J222487 provides a practical method of adding electrical monitoring to compatible Mersen NH2 fuse-base installations. Its compact format and standard 6.3 × 0.8 mm terminals support straightforward integration within industrial switchboards and power-distribution panels.
Key Advantages
- Provides remote fuse-status indication.
- Designed for compatible single-pole NH size 2 fuse bases.
- Operates with suitable NH fuse-links incorporating a striker.
- Can indicate when the fuse-link has operated or is absent.
- 250 V AC, 10 A switch rating.
- Supports integration with alarms, indicators and automation systems.
- Helps reduce fault-finding and maintenance time.
Key Features
- Mersen MSBB21 microswitch.
- Manufacturer item number J222487.
- Compatible with selected Mersen NH2 fuse bases.
- Intended for single-pole fuse-base configurations.
- Suitable for striker-operated NH fuse-links.
- Rated switching voltage of 250 V AC.
- Rated switching current of 10 A.
- 6.3 × 0.8 mm connection terminals.
- Suitable for remote indication and monitoring circuits.
Reliable Fuse-Status Monitoring for NH Systems
Fuse-status monitoring allows maintenance personnel and control systems to identify an operated fuse without inspecting every fuse-link individually. When a compatible striker-equipped NH fuse-link operates, the striker mechanically changes the state of the Mersen J222487 microswitch.
The resulting electrical signal can be connected to a warning lamp, audible alarm, PLC input or remote monitoring system. This helps minimise equipment downtime and supports faster diagnosis of faults in industrial power-distribution equipment.
Typical Applications
- Industrial low-voltage switchboards.
- NH2 fuse-base assemblies.
- Power-distribution panels.
- Motor control centres.
- Industrial machinery panels.
- PLC-based fuse monitoring systems.
- Remote alarm and indication circuits.
- OEM electrical-panel construction.
Technical Specifications
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| Device Type | Fuse base / holder | |
|---|---|---|
| Fuse Type | NH (DIN) | |
| Fuse Size | NH2 | |
| Current | 10 A | |
| Voltage | 250 V | |
| Manufacturer | Mersen | |
| Manufacturer item number | J222487 | |
| Model | MSBB21 | |
| Product type | Fuse-base microswitch | |
| Compatible fuse size | NH2 | |
| Compatible configuration | Single-pole fuse base | |
| Compatible fuse-link type | NH fuse-link with striker | |
| Function | Remote fuse-status indication | |
| Operating condition | Fuse-link operated or absent | |
| Rated voltage | 250 V AC | |
| Rated current | 10 A | |
| Terminal dimensions | 6.3 × 0.8 mm | |
| Installation type | Accessory mounting on a compatible fuse base | |
| Application | Monitoring and signalling circuits |
Frequently Asked Questions
What is the Mersen J222487 used for?
The J222487 is a microswitch used to provide remote status indication from a compatible single-pole NH size 2 fuse base.
What is the alternative model number for the J222487?
The Mersen J222487 is also identified by the model or catalogue reference MSBB21.
How does the microswitch detect an operated fuse?
A compatible NH fuse-link contains a striker that actuates the microswitch when the fuse-link operates. The switch can then send a signal to an alarm, indicator or control system.
What is the electrical rating of the microswitch?
The J222487 microswitch is rated at up to 250 V AC and 10 A.
Can the J222487 be used with any NH fuse base?
No. It is intended for compatible single-pole NH size 2 fuse bases and should be used with an appropriate striker-equipped NH fuse-link.
Trusted for Industrial Fuse Monitoring
Mersen fuse-base microswitches are used by panel builders, maintenance engineers and industrial equipment manufacturers to provide dependable fuse-status signalling and faster identification of electrical faults.
