What does CC mean on fuses?
Class CC fuses. These non-renewable fuses are current-limiting and intended for the protection of components sensitive to short-time overloads, non-inductive loads, and short-circuit protection of motor circuits. Current ratings range from 0A to 30A, and the voltage rating is 600VAC.
What is a FWP fuse?
FWP fuses couple high speed performance with full range protection. By operating at both short- circuit and overload currents, they provide complete protection for semiconductor applications.
What size is a class CC fuse?
A superior, all-purpose, space-saving branch circuit fuse that meets most protection requirements up to 30A. Very compact, with a physical size only 13⁄32″ x 11⁄2″ (10.3 x 38.1mm) with rejction tip.
What are fuse classes?
Classes of Fuses In the case of fuses, these standards have culminated in the establishment of distinct classes of low-voltage (600 volts or less) fuses, Classes RK1, RK5, G, L, T, J, H and CC being the more important.
What does the R in Class R fuses mean?
for rejection
Class R Fuses Class R (“R” for rejection) fuses are high performance, 1⁄10 to 600A units, 250V and 600V, having a high degree of current-limitation and a short-circuit interrupting rating of up to 300,000A (RMS symmetrical).
What are FNQ fuses used for?
Series FNQ-R, ATQR, and KLDR handle inductive loads from devices such as control transformers and solenoids. UL Class CC fuses provide a high interrupting rating and current limitation for overcurrent protection of branch circuits, control circuits, lighting, transformers, and general loads.
What is the difference between Class J and Class R fuses?
All Class R fuses must be labeled “Current Limiting.” They may be labeled “Time Delay,” indicating that they meet the optional time-delay test by not opening in less than 10 seconds at 500% of fuse ampere rating. Class J fuses. These non-renewable fuses are current-limiting and conform to 248-8.
What sizes do fuses come in?
Size groups
| Blade size | Blade group | Common ratings (maximum current) |
|---|---|---|
| LP-Mini (low profile) | APS, ATT | 2, 3, 4, 5, 7.5, 10, 15, 20, 25, 30 |
| Mini | APM, ATM | 2, 3, 4, 5, 7.5, 10, 15, 20, 25, 30 |
| Regular | APR, ATC, ATO, ATS | 0.5, 1, 2, 3, 4, 5, 7.5, 10, 15, 20, 25, 30, 35, 40 |
| Maxi | APX | 20, 25, 30, 35, 40, 50, 60, 70, 80, 100, 120 |
What size are AGC fuses?
Eaton’s AGC fast-acting, glass tube 1/4″ x 1-1/4″ ferrule fuses are designed to UL 248-14 for overcurrent protection of electronic circuits.
How do you tell what size fuse you need?
To calculate a fuse rating, manufacturers work from a simple equation:
- Power (watts) = Voltage x Current (amps) What we really want to know with this equation is the current (amps).
- Amps = Watts / Voltage. So, let’s say we need to work out the fuse rating for a washing machine.
- 850/120 = 7.08 amps.
How do I choose the right size fuse?
The voltage and current ratings are paramount. A fuse should be de-rated by 25% at room temperature, meaning if there is a 7.5 amp circuit, a 10 amp fuse should be used at 25˚C. Voltage ratings on a fuse can be higher than the voltage on the circuit, but not lower.
What is a 7.5 fuse used for?
Small Tools, Great Use – These 7.5 amp automotive fuses will blow when the current is overloaded, which can protect your safety. It is used in many appliances such as cabin lamp, tail lamp, horn, air conditioning system, or other electronic products.
What is the difference between Class CC fuses and FNQ-R fuses?
The Class CC FNQ-R Limitron fuse meets the needs of control circuit transformer protection. FNQ-R fuses can be sized according to NEC® and UL requirements and still allow the high inrush currents, with significantly more time-delay than the UL minimum value of 12 seconds at 200% for Class CC fuses.
What size fuse do I need for my fuses?
Smaller fuses such as the 5x20mm and 1/4″ x 1-1/4″ are easy to insert into the hinged top style of fuse blocks. These are usually selected for lower voltages and lower current rated applications. For higher current carrying applications a larger fuse such as the 13/32″ x 1-1/2″ size fuse may be more appropriate.
What size fuse do I need for my weidmuller terminal block?
The variety of Weidmuller terminal block product lines provides the engineer with a broad list of options for fuse selection. Smaller fuses such as the 5x20mm and 1/4″ x 1-1/4″ are easy to insert into the hinged top style of fuse blocks. These are usually selected for lower voltages and lower current rated applications.
What is a cartridge fuse?
Cartridge style fuses feature a metal part on each end that is used for the input and output electric current connection. The two ends are connected on te outside via a cylinder of a non-conductive (dielectric) material.