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MERSEN FUSE 690V CP 14X51 AM 0.25A S/I FR14AM69V0.25
Mersen FR14AM69V0.25 0.25 A, 690 V AC aM cylindrical fuse link in a 14 x 51 mm format for short-circuit protection of motors, transformers and industrial loads with high inrush currents.
£2.52
Why Choose the Mersen FR14AM69V0.25 Cylindrical Fuse Link?
The Mersen FR14AM69V0.25 is a high-quality 14 × 51 mm cylindrical aM fuse link designed to provide dependable short-circuit protection for motors, transformers and other industrial loads with high inrush currents. Rated at 0.25 A and 690 V AC, it is suited to low-current control, transformer and motor circuits operating at elevated industrial voltages.
As an aM utilisation category fuse, the FR14AM69V0.25 provides partial-range protection against damaging short-circuit currents while tolerating the temporary current peaks associated with transformer energisation and motor starting. It should be coordinated with a suitable overload relay, motor protection device or other overload protection system.
The fuse link features a durable ceramic body and silver-plated contacts for reliable electrical conductivity, effective current limitation and consistent long-term performance. Its standard non-indicating construction allows straightforward installation in compatible 14 × 51 mm cylindrical fuse holders.
Key Advantages
- Standard 14 × 51 mm cylindrical fuse-link format.
- 0.25 A rated current for low-current industrial protection circuits.
- 690 V AC IEC voltage rating.
- aM partial-range characteristic designed for short-circuit protection.
- 120 kA AC breaking capacity for reliable fault interruption.
- Current-limiting operation helps reduce thermal and mechanical stress during faults.
Key Features
- Mersen FR14 aM cylindrical fuse-link series.
- 14 × 51 mm nominal fuse size.
- 0.25 A rated current.
- 690 V AC rated voltage according to IEC.
- aM motor and transformer protection characteristic.
- 120 kA rated AC breaking capacity.
- Standard non-indicating fuse-link construction.
- Ceramic body with silver-plated ferrule contacts.
Reliable Protection for Motors and Transformers
Motors and transformers can draw substantial temporary inrush currents during starting or energisation. The aM operating characteristic allows the Mersen FR14AM69V0.25 to tolerate these normal current peaks while responding rapidly to destructive short-circuit faults.
Because the FR14AM69V0.25 is a partial-range fuse, it does not provide complete overload protection. Coordinating it with a correctly selected overload relay or protective device helps safeguard cables, transformers, motors and associated control equipment against both overload and short-circuit conditions.
Typical Applications
- Industrial transformer protection circuits.
- Low-current motor control systems.
- Control transformers and auxiliary circuits.
- Industrial control panels and switchgear.
- Machinery and automation equipment.
- OEM electrical protection assemblies.
Technical Specifications
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| Current | 0.25 A | |
|---|---|---|
| Voltage | 690 V | |
| Device Type | Fuse link | |
| Fuse Type | Cylindrical | |
| Fuse Size | 14x51 mm | |
| Fuse Class | aM | |
| Manufacturer | Mersen | |
| Manufacturer part number | FR14AM69V0.25 | |
| Mersen item number | B212590 | |
| Product type | Cylindrical ferrule fuse link | |
| Fuse characteristic | aM | |
| Fuse size | 14 × 51 mm | |
| Rated current | 0.25 A | |
| Rated voltage | 690 V AC IEC | |
| Rated breaking capacity | 120 kA AC at 690 V | |
| Current type | AC | |
| Protection range | Partial-range short-circuit protection | |
| Indication system | None | |
| Mounting type | Clip mounting in a compatible fuse holder | |
| Terminal type | Cylindrical ferrule | |
| Body material | Ceramic | |
| Contact finish | Silver-plated | |
| Nominal diameter | 14 mm | |
| Nominal length | 51 mm | |
| Overload protection | Separate overload protection required | |
| HS Code | 85361010 | |
| Country of Manufacture | Tunisia |
Frequently Asked Questions
What is the Mersen FR14AM69V0.25 used for?
The FR14AM69V0.25 provides short-circuit protection for motors, transformers and other industrial loads with high inrush currents.
What are the current and voltage ratings?
The fuse link has a rated current of 0.25 A and an IEC rated voltage of 690 V AC.
What does the aM fuse characteristic mean?
The aM characteristic indicates that the fuse provides partial-range protection against short-circuit currents. A separate device is required to provide overload protection.
Does the FR14AM69V0.25 include a striker or indicator?
No. The FR14AM69V0.25 is a standard fuse link supplied without a striker or visual fuse-operation indicator.
What fuse holder is compatible with this fuse?
This fuse is designed for a compatible 14 × 51 mm cylindrical fuse holder with suitable current and voltage ratings.
Trusted for Industrial Circuit Protection
Mersen cylindrical fuse links are used by panel builders, machinery manufacturers and electrical engineers to provide dependable current limitation and coordinated short-circuit protection for motors, transformers and industrial electrical equipment.
