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MERSEN FUSE BASE MOD. CMS.14 3P CMS143
Mersen CMS143 Modulostar three-pole DIN rail fuse holder for 14 x 51 mm cylindrical fuse links, rated 50 A and 690 V AC/DC with IP20 finger-safe protection.
£26.95
Why Choose the Mersen CMS143 Modulostar® Fuse Holder?
The Mersen CMS143, manufacturer reference S331032, is a dependable three-pole modular fuse holder designed for 14 × 51 mm cylindrical fuse links. As part of the trusted Mersen Modulostar® CMS14 series, it provides reliable overcurrent protection and safe circuit isolation for industrial control panels, machinery and power distribution systems.
Designed with operator safety in mind, the CMS143 features a finger-safe IP20 enclosure, including during fuse replacement. Its durable thermoplastic construction and compact modular design make it well suited to demanding industrial environments where dependable performance and long service life are essential.
Rated at 50 A and suitable for systems up to 690 V AC or 690 V DC, the CMS143 provides reliable protection for motors, transformers, industrial drives and general low-voltage distribution equipment. Its DIN rail mounting allows quick installation within electrical control panels and switchboards.
Key Advantages
- Reliable three-pole modular fuse holder.
- Designed for 14 × 51 mm cylindrical fuse links.
- 50 A thermal current rating.
- Suitable for 690 V AC and 690 V DC IEC systems.
- Finger-safe IP20 protection, including during fuse replacement.
- 100 kA short-circuit current rating when used with suitable fuse links.
- Compact DIN rail mounting design.
- Ideal for industrial control panels and automation equipment.
Key Features
- Mersen Modulostar® CMS14 series.
- Three-pole configuration.
- Compatible with 14 × 51 mm cylindrical fuse links.
- 50 A rated current.
- 690 V AC / 690 V DC IEC ratings.
- Standard version without visual fuse indication.
- Optional microswitch compatibility via accessory kits.
- Finger-safe IP20 enclosure.
- DIN rail mounting to EN 60715.
- High mechanical and thermal resistance.
Reliable Three-Phase Circuit Protection
The Mersen CMS143 securely accommodates three 14 × 51 mm cylindrical fuse links, providing dependable protection against overload and short-circuit conditions when used with correctly selected fuse links. Its compact modular construction makes it suitable for industrial machinery, OEM equipment and electrical distribution panels.
Built to IEC requirements, the CMS143 combines robust mechanical construction with excellent thermal performance. The CMS14 range also offers versions with visual indication, microswitches or both where local or remote fuse monitoring is required.
Typical Applications
- Industrial control panels.
- Motor control centres.
- Three-phase power distribution.
- Variable speed drive protection.
- Transformer protection.
- OEM machinery.
- Automation systems.
- Electrical switchboards.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | None | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 3-pole | |
| Device Type | Fuse base / holder | |
| Fuse Type | Cylindrical | |
| Fuse Size | 14x51 mm | |
| Current | 50 A | |
| Voltage | 690 V | |
| Manufacturer | Mersen | |
| Series | Modulostar® CMS14 | |
| Model | CMS143 | |
| Manufacturer part number | S331032 | |
| Product type | Modular cylindrical fuse holder | |
| Fuse size | 14 × 51 mm | |
| Number of poles | 3 | |
| Rated current | 50 A | |
| Rated voltage AC | 690 V IEC | |
| Rated voltage DC | 690 V IEC | |
| Rated insulation voltage | 690 V | |
| Rated impulse withstand voltage | 8 kV | |
| Short-circuit current rating | 100 kA | |
| Protection rating | IP20 | |
| Fuse indication | No integrated visual indicator | |
| Mounting type | DIN rail mounting | |
| Operating temperature | -25°C to +60°C | |
| EAN | 8430399000213 | |
| RoHS compliant | Yes | |
| HS Code | 85361050 | |
| Country of Manufacture | Tunisia |
Frequently Asked Questions
What is the Mersen CMS143 used for?
The CMS143 is a three-pole modular fuse holder designed to protect industrial electrical circuits using 14 × 51 mm cylindrical fuse links.
What fuse size does the CMS143 accept?
It is designed specifically for 14 × 51 mm cylindrical fuse links.
Does the CMS143 include a blown-fuse indicator?
No. The standard CMS143 does not include an integrated visual blown-fuse indicator. Alternative CMS14 variants are available with indicator and microswitch options.
What are the electrical ratings?
The fuse holder is rated at 50 A and is suitable for IEC systems operating up to 690 V AC or 690 V DC.
How is the Mersen CMS143 installed?
The CMS143 mounts directly onto a standard DIN rail, allowing quick installation inside industrial control panels, machinery and electrical switchboards.
Trusted by Electrical Professionals Worldwide
Mersen Modulostar® fuse holders are trusted by electrical engineers, machine builders and panel manufacturers for dependable circuit protection, finger-safe operation and long-term industrial reliability.
