Why Choose the Mersen ATQ9 Time-Delay Fuse?
The Mersen ATQ9 is a compact and dependable time-delay midget cartridge fuse designed to provide supplemental overcurrent protection for industrial control circuits and electrical equipment. Part of the established Mersen Amp-Trap ATQ series, it tolerates temporary inrush currents while protecting connected components against sustained overloads and short-circuit conditions.
Rated at 9 A and 500 V AC, the ATQ9 is suitable for control transformers, solenoids, relays, lighting circuits and other inductive electrical loads. Its time-delay operating characteristic helps reduce unnecessary fuse operation when compatible equipment is energised while maintaining dependable protection during genuine electrical faults.
The fuse uses a standard 10 × 38 mm midget cartridge format with ferrule terminals, enabling straightforward installation in compatible fuse holders and fuse blocks. Its compact construction and reliable performance make it a practical choice for industrial machinery, automation panels and commercial electrical systems.
Key Advantages
- Dependable time-delay overcurrent protection for circuits with temporary inrush currents.
- 9 A current rating suitable for industrial control and auxiliary circuits.
- 500 V AC voltage rating for a wide range of electrical systems.
- Compact 10 × 38 mm midget cartridge design.
- Helps minimise nuisance fuse operation during equipment start-up.
- Suitable for transformers, solenoids, relays and other inductive loads.
Key Features
- Mersen Amp-Trap ATQ series time-delay fuse.
- 9 A rated current.
- 500 V AC rated voltage.
- Time-delay operating characteristic.
- Standard 10 × 38 mm cylindrical cartridge.
- 10 kA AC interrupting rating.
- Ferrule terminals for compatible midget fuse holders.
- Designed for supplemental circuit protection.
Reliable Protection for Circuits with Inrush Current
Time-delay fuses are designed to tolerate brief current increases produced when transformers, solenoids, relays and other inductive devices are energised. This allows compatible equipment to start normally without sacrificing protection against prolonged overloads or damaging short-circuit currents.
The Mersen ATQ9 combines reliable time-delay performance with a compact midget cartridge format. It can be installed in a correctly rated 10 × 38 mm fuse holder, helping panel builders and maintenance engineers protect industrial electrical equipment while conserving valuable control-panel space. The ATQ9 is intended for supplemental protection rather than branch circuit protection.
Typical Applications
- Industrial control panels and auxiliary circuits.
- Control transformers and power supplies.
- Relay and solenoid circuits.
- Lighting and heating control equipment.
- Industrial machinery and automation systems.
- Commercial electrical installations.
