Micro Box Radial Sub Miniature Fuse 20A 350V Leaded Time Lag

Product Specification

Micro Box Type Radial Leaded Time Lag Subminiature Fuse TMS T20A 350V With UL TUV Certifications

Description Of The Time Lag Subminiature Fuse

Subminiature, radial lead, High I2 t, time-lag design, rated 350VAC, 72 DC, up to 20A, Approved by UL,CUL,TUV and complied with UL 248-Standards:In accordance with IEC60127-1, IEC60127-3 Standard sheet4, GB9364.1-1997, GB9364.3-1997.

Certification Of The Time Lag Subminiature Fuse

Features Of The Time Lag Subminiature Fuse

- High I2 t, High amp ratings to 20A

- Time lag (350 VAC)

- Meet UL 248-14

- Wide operating temperature range

- Bulk and Tape & Ammo packing available

- Full compliance with EU Directive 2011/65/EU and amending directive 2015/863

- Halogen Free and Lead Free

- UL,CUL,TUV

Application Of The Time Lag Subminiature Fuse

Provide individual protection for components or internal circuits.

- Power supplies

- Battery chargers

- Consumer Electronics

- Adapter

- Industrial Controllers

Part Numbering Of The Time Lag Subminiature Fuse

Breaking Capacity: 35A or 10In whichever is greater.
After the test, the insulation resistance value is greater than 0.1ΜΩ

Operating Characteristics Of The Time Lag Subminiature Fuse

Selection Table Of The Time Lag Subminiature Fuse

Can fast-acting fuse replaced by slow blow fuse ?

The two can replace each other in some circuits with less stringent requirements, but cannot replace each other in circuits with strict requirements.
T2A is a slow blow fuse and F2A is a fast blow fuse. The main difference between a slow-blow fuse and a fast-blow fuse is its ability to withstand instantaneous pulse current, which means that it can resist the impact of surge current when switching on and off without moving, thus ensuring the normal operation of the equipment, so slow-blow fuses Often referred to as a surge fuse.
From a technical point of view, slow-blow fuses have a larger melting heat value and require a larger amount of energy to fuse. Therefore, for fuses with the same rated current, slow-blow fuses are much more resistant to pulses than fast-blow fuses.
Since the thermal energy value of the slow-blow fuse is larger than that of the fast-blow fuse of the same specification, the fusing time will be slower than that of the fast-blow fuse when an overcurrent occurs in the circuit.
Once the circuit fails, the overcurrent will not disappear by itself. The energy of the continuous overcurrent will greatly exceed the thermal energy value of the fuse. No matter what kind of fuse will be blown, the time difference between slow blowing and fast blowing is important for its protection requirements. It is not very important, only when there are sensitive devices in the protected circuit that need to be protected, slow fuse will have an impact on the protection performance.

Because of these differences, slow-blow fuses and fast-blow fuses are used in different circuits: pure resistive circuits (no or little surge) or circuits that need to protect sensitive and valuable components such as ICs must use fast-blow fuses; For capacitive or inductive circuits (there is a surge when switching on and off), it is best to use slow-blow fuses in the input/output parts of the power supply; in addition to protecting IC circuits, slow-blow fuses can be used in most situations where fast-blow fuses are used. It improves the anti-interference ability; on the contrary, if the fast-blow fuse is used in the place where the slow-blow fuse is used, it will often cause the phenomenon that the instant-blow fuse cannot work normally.