2-SMD Board Mount Square End Block Slow Blow Cartridge Surface Mount Fuse 6.3A 350V UL248-14 Compliant
Price:
Contact Ampfort sales
MOQ:
1000 Pcs
Delivery Time:
10 Workdays
Brand:
AMPFORT
Product Description
Product Overview
2-SMD Board Mount Square End Block Slow Blow Cartridge Surface Mount Fuse rated at 6.3A 350V, designed for reliable overcurrent protection in demanding electrical applications.
Product Description
This slow blow surface mount fuse is UL248-14 compliant and engineered to withstand high inrush surge currents, making it ideal for power supply and LED driver applications. Available with gold-plated caps for superior soldering safety or silver-plated caps for cost-effective single-plate PCB solutions.
Applications
- LED Driver Systems
- Power Adapters
- Power Supply Units
- Telecommunications Equipment
- Security Systems
- LED Lighting Solutions
- Monitor LCD/LED Displays
Fusing Time Characteristics
| % of Ampere Rating (In) | Blowing Time |
|---|---|
| 100% * In | 4 hours Min |
| 200% * In | 120 sec Max |
| 1000% * In | 10ms Min |
Electrical Specifications
Breaking Capacity: 35A@350Vac, 50A@300Vac, 50A@250Vac, 200A@125Vac
| Catalog No. | Ampere Rating | Voltage Rating | Nominal Cold Resistance (Ohms) | I²T Melting Integral (A².S) |
|---|---|---|---|---|
| SRT0250 | 250mA | 350V | 0.860 | 0.145 |
| SRT0300 | 300mA | 350V | 0.620 | 0.162 |
| SRT0315 | 315mA | 350V | 0.550 | 0.189 |
| SRT0375 | 375mA | 350V | 0.470 | 0.200 |
| SRT0400 | 400mA | 350V | 0.380 | 0.238 |
| SRT0500 | 500mA | 350V | 0.320 | 0.275 |
| SRT0600 | 600mA | 350V | 0.285 | 0.470 |
| SRT0630 | 630mA | 350V | 0.256 | 0.566 |
| SRT0700 | 700mA | 350V | 0.208 | 0.805 |
| SRT0750 | 750mA | 350V | 0.175 | 1.240 |
| SRT0800 | 800mA | 350V | 0.155 | 1.880 |
| SRT1100 | 1A | 350V | 0.148 | 3.500 |
| SRT1125 | 1.25A | 350V | 0.102 | 4.760 |
| SRT1150 | 1.5A | 350V | 0.085 | 6.305 |
| SRT1160 | 1.6A | 350V | 0.075 | 6.505 |
| SRT1200 | 2A | 350V | 0.044 | 8.950 |
| SRT1250 | 2.5A | 350V | 0.043 | 16.025 |
| SRT1300 | 3A | 350V | 0.033 | 21.560 |
| SRT1315 | 3.15A | 350V | 0.029 | 22.750 |
| SRT1350 | 3.5A | 350V | 0.027 | 27.050 |
| SRT1400 | 4A | 350V | 0.025 | 31.808 |
| SRT1500 | 5A | 350V | 0.019 | 40.250 |
| SRT1600 | 6A | 350V | 0.018 | 67.245 |
| SRT1630 | 6.3A | 350V | 0.017 | 73.550 |
| SRT1700 | 7A | 350V | 0.015 | 76.280 |
Fuse Resistor Technical FAQs
1. Do fuses act as resistors?
A resistor limits current by its resistance value measured in ohms. A fuse limits overcurrent damage by opening the circuit above a certain current value. A fuse can be used as a resistor, and fusible resistors combine both functions with definite resistance values and overcurrent protection.
2. What is a fusible resistor?
The fusible resistor is a special type of resistor designed for circuit protection, ideal for sensitive circuits with lower power requirements and moderate overload handling needs.
3. How do fusible resistors work?
A fusible resistor opens like a fuse when its current rating is exceeded. Typically made from nichrome with a melting temperature around 1,400°C, it maintains stable resistance across temperature variations.
4. What is the resistance of a fuse?
Fuse resistance varies by type, voltage, current, and I²t ratings. Nominal "cold" resistance (at
5. How do you calculate resistance of a fuse?
Using the formula R=V²/P, where V is voltage and P is power. Fuse amperage is typically inscribed on the exterior, and resistance can be measured with a multimeter.
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Dongguan Ampfort Electronics Co., Ltd.
Location
Floor 5,Changlong Industrial Building,No.6,Jiangnan Road,Jingshan,Chashan Town,Dongguan 523323,China
Contact Person
Annie Fang