Why Choose the Mersen H201257 Medium Time-Lag Miniature Fuse?
The Mersen H201257 is a compact and dependable 5 × 20 mm medium time-lag miniature fuse designed to protect electrical distribution circuits and industrial equipment against sustained overloads and short circuits. Part of the established Mersen 5SM IEC miniature fuse series, it combines controlled inrush-current tolerance with reliable fault interruption.
Its medium time-lag characteristic allows brief current surges associated with equipment start-up to pass without unnecessary fuse operation. This makes the H201257 suitable for circuits where a quick-acting fuse may operate prematurely, but where responsive protection is still required against prolonged overcurrent conditions.
With a rated current of 0.16 A, a rated voltage of 250 V AC and standard 5 × 20 mm dimensions, the Mersen H201257 provides an effective protection solution for low-current control, instrumentation and industrial auxiliary circuits.
Key Advantages
- Medium time-lag operation tolerates brief normal inrush currents.
- 0.16 A current rating for sensitive low-current circuits.
- 250 V AC voltage rating for industrial electrical equipment.
- Compact 5 × 20 mm IEC miniature fuse format.
- Protects against sustained overloads and short-circuit currents.
- Manufactured by Mersen for consistent circuit protection performance.
Key Features
- Mersen 5SM IEC miniature fuse series.
- 0.16 A rated current.
- 250 V AC rated voltage.
- Medium time-lag operating characteristic.
- Standard 5 × 20 mm cylindrical cartridge format.
- Designed for electrical distribution and industrial applications.
- Suitable for circuits experiencing temporary start-up currents.
- Manufactured in accordance with IEC miniature fuse requirements.
Balanced Protection for Circuits with Inrush Current
Medium time-lag fuses provide a balance between rapid fault protection and tolerance of short-duration current peaks. They are useful in circuits where capacitors, transformers or other components may draw a temporary surge when energised.
The Mersen 5SM range is designed for electrical distribution circuits and other industrial applications requiring compact IEC-format protection. The H201257 helps reduce nuisance fuse replacement while still disconnecting the circuit when an overload persists.
Typical Applications
- Industrial control panels.
- Control and auxiliary circuits.
- Instrumentation and measurement equipment.
- Power supplies and transformer circuits.
- Automation and process control systems.
- OEM machinery and electronic equipment.
