Why Choose the Mersen ATQ1/4 Time-Delay Midget Fuse?
The Mersen ATQ1/4 is a compact time-delay midget fuse designed to provide dependable supplementary overcurrent protection for sensitive control circuits, transformers, relays and industrial electrical equipment. As part of the established Mersen Amp-Trap® ATQ series, it tolerates normal short-duration current surges while responding effectively to sustained overloads and short circuit conditions.
Its time-delay operating characteristic helps reduce nuisance fuse operation during transformer energisation, solenoid activation and other temporary inrush-current events. This makes the ATQ1/4 a practical choice for low-current industrial applications where a fast-acting fuse could open during normal equipment start-up.
With a rated current of 1/4 A (0.25 A), a voltage rating of up to 500 V AC and a compact midget-format body, the Mersen ATQ1/4 delivers reliable supplementary protection for instrumentation, monitoring equipment and industrial control systems.
Key Advantages
- Time-delay operation accommodates normal temporary inrush currents.
- 0.25 A current rating for sensitive, low-current electrical circuits.
- Rated for applications operating at up to 500 V AC.
- Helps minimise nuisance fuse operation during equipment energisation.
- Compact midget format conserves space inside electrical enclosures.
- Suitable for instrumentation, transformers, relays and industrial controls.
Key Features
- Mersen Amp-Trap® ATQ series.
- Time-delay midget fuse.
- 1/4 A (250 mA) ampere rating.
- 500 V AC rated voltage.
- Designed to tolerate normal short-duration current surges.
- Cylindrical ferrule construction.
- Compact 10 × 38 mm nominal fuse format.
- Suitable for supplementary overcurrent protection.
Reliable Time-Delay Protection for Sensitive Circuits
Transformers, relays, solenoids and other inductive components can draw a temporary surge of current when first energised. The time-delay characteristic of the Mersen ATQ1/4 allows normal short-duration surges to pass without unnecessarily opening the circuit, while still providing protection against sustained excessive current.
This operating behaviour helps improve equipment availability and reduces maintenance associated with nuisance fuse replacement. The ATQ1/4 is particularly suitable for applications requiring a compact 0.25 A fuse that combines inrush tolerance with dependable supplementary protection.
Typical Applications
- Industrial control panels.
- Instrumentation and monitoring equipment.
- Control transformers.
- Relay and contactor circuits.
- Alarm and signalling circuits.
- Solenoids and electromagnetic devices.
- OEM machinery and electrical assemblies.
- Supplementary circuit protection.
