Description
H14F/H14FA 10A–50A 750V/1000V DC fuse / automobile fuse / Chinese Fuse Manufacturer
H14F/H14FA DC fast fuse
1. Purpose and Use
This series of fuses are suitable for rated DC 750V–1000V (10A–50A) line protection. They offer comprehensive protection for instrument power lines and wiring harnesses. Features include strong current-limiting capability, high breaking capacity, fast short-circuit response, and resistance to temperature, mechanical, and chemical shock. Breaking capacity: AC 50KA, DC 20KA.
2. Normal Working Conditions
Ambient air temperature range: -40℃ to +125℃
3. Use Category
“gR” indicates a fast-acting fuse for full-range protection.
4. Structural Features
The fuse tube is made from high-temperature resistant, flame-retardant materials with high hardness. The fuse element is 99.99% pure silver, sealed in the tube filled with high-purity quartz sand and arc-extinguishing chemicals. Contact surfaces are silver-plated for better conductivity and reduced heat rise. Spot welding at both ends enhances safety and breaking performance.
5. Agreed Current and Time
Note: Custom agreed current/time can be discussed with the manufacturer.
| Test Current (A) | Fusing Time (s) | |
|---|---|---|
| Min | Max | |
| 1.1In | 14400 | – |
| 1.35In | 150 | 3600 |
| 1.5In | 20 | 1500 |
| 2In | 1 | 300 |
| 3In | 0.2 | 30 |
| 5In | 0.05 | 1 |
6. Main Parameters
| No. | Model Number | Rated Current (A) | Rated Voltage (VDC) | Breaking Capacity (DC) | Rated Voltage (VAC) | Breaking Capacity (AC) |
|---|---|---|---|---|---|---|
| 1 | H14F10 / H14FA10 | 10A | 750V / 1000V | 20kA | 500V / 700V | 50kA |
| 2 | H14F15 / H14FA15 | 15A | 750V / 1000V | 20kA | 500V / 700V | 50kA |
| 3 | H14F20 / H14FA20 | 20A | 750V / 1000V | 20kA | 500V / 700V | 50kA |
| 4 | H14F25 / H14FA25 | 25A | 750V / 1000V | 20kA | 500V / 700V | 50kA |
| 5 | H14F30 / H14FA30 | 30A | 750V / 1000V | 20kA | 500V / 700V | 50kA |
| 6 | H14F35 / H14FA35 | 35A | 750V / 1000V | 20kA | 500V / 700V | 50kA |
| 7 | H14F40 / H14FA40 | 40A | 750V / 1000V | 20kA | 500V / 700V | 50kA |
| 8 | H14F45 / H14FA45 | 45A | 750V / 1000V | 20kA | 500V / 700V | 50kA |
| 9 | H14F50 / H14FA50 | 50A | 750V / 1000V | 20kA | 500V / 700V | 50kA |
Note: Can be customized as per customer-specific requirements.
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