| Image | Part Number | Description / PDF | Quantity | Rfq |
|---|---|---|---|---|
 |
Bel Fuse, Inc. |
FUSE BOARD MOUNT 1A 250VAC 2SMD |
896 |
|
 |
Bel Fuse, Inc. |
FUSE CERAMIC 30A 500VAC/VDC 3AB |
437 |
|
 |
Bel Fuse, Inc. |
FUSE BRD MNT 20A 350VAC 72VDC |
2920 |
|
 |
Bel Fuse, Inc. |
FUSE BRD MNT 3.5A 125VAC/VDC SMD |
0 |
|
 |
Bel Fuse, Inc. |
FUSE GLASS 1A 250VAC 3AB 3AG |
0 |
|
 |
Bel Fuse, Inc. |
FUSE BRD MNT 500MA 250VAC RADIAL |
0 |
|
 |
Bel Fuse, Inc. |
FUSE CERAMIC 15A 600VAC/500VDC |
500 |
|
 |
Bel Fuse, Inc. |
FUSE GLASS 2.5A 250VAC 5X20MM |
980 |
|
 |
Bel Fuse, Inc. |
FUSE 5A 250/277V RADIAL |
0 |
|
 |
Bel Fuse, Inc. |
FUSE BRICK SMD 2410 SLOW 7A |
0 |
|
 |
Bel Fuse, Inc. |
FUSE BOARD MNT 2A 125VAC/VDC SMD |
701 |
|
 |
Bel Fuse, Inc. |
FUSE BOARD MNT 2.5A 350VAC 72VDC |
1557 |
|
 |
Bel Fuse, Inc. |
FUSE BOARD MNT 750MA 125VAC/VDC |
0 |
|
 |
Bel Fuse, Inc. |
FUSE GLASS 5A 350VAC 140VDC 2AG |
871 |
|
 |
Bel Fuse, Inc. |
FUSE CERAMIC 250MA 250VAC 5X20MM |
0 |
|
 |
Bel Fuse, Inc. |
FUSE GLASS AXIAL |
0 |
|
 |
Bel Fuse, Inc. |
FUSE BOARD MNT 250MA 32VAC 63VDC |
0 |
|
 |
Bel Fuse, Inc. |
FUSE BRD MNT 100MA 250VAC RADIAL |
3 |
|
 |
Bel Fuse, Inc. |
FUSE 1.5A 63VAC/DC SLOW 1206 |
209 |
|
 |
Bel Fuse, Inc. |
FUSE BRD MNT 800MA 350VAC 100VDC |
42 |
|
Fuses are electrical safety devices that protect circuits from overcurrent conditions. As the oldest and most widely used circuit protection technology, fuses operate by breaking the circuit when current exceeds specified limits. Their importance in modern electronics spans from consumer devices to industrial machinery, preventing damage from short circuits, overloads, and fault conditions while ensuring system reliability and safety.
| Type | Functional Features | Application Examples |
|---|---|---|
| Miniature Cartridge Fuses | Compact glass/ceramic body, fast-acting response | Power supplies, consumer electronics |
| Time-Delay Fuses | Withstands temporary current surges, slow-blow characteristics | Motors, transformers, switch-mode power supplies |
| High-Breaker Fuses | Handles extreme fault currents (>10kA), ceramic construction | Industrial equipment, HVAC systems |
| Surface-Mount Fuses | Miniaturized SMD packaging for PCB integration | Smartphones, medical devices |
| Resettable Fuses (PTC) | Polymer-based self-resetting functionality | USB ports, battery protection circuits |
Typical fuse construction includes: - Enclosure: Glass, ceramic, or plastic housing (dimensions standardized as 5x20mm, 6.3x32mm) - Fusible Element: Calibrated wire or etched metal strip (silver, copper, or alloy materials) - Filling Material: Sand/quartz for arc suppression in high-current models - Contact Terminals: Metal caps or surface-mount pads for electrical connection Modern designs incorporate laser-welded elements and precision-calibrated response mechanisms.
| Parameter | Description | Importance |
|---|---|---|
| Rated Current (In) | Max normal operating current (0.1-250A range) | Determines circuit protection threshold |
| Voltage Rating | Max circuit voltage (32V-1000V DC/AC) | Ensures safe arc interruption |
| Breaking Capacity | Fault current interruption capability (10A-300kA) | Prevents catastrophic failure |
| Response Time | 0.1ms (fast-acting) to 10s (time-delay) | Matches load characteristics |
| Trip Characteristic Curve | I2t let-through energy rating | Coordinates with upstream devices |
Key industries include: - Consumer Electronics: Mobile devices, home appliances - Automotive: Battery management systems, EV charging circuits - Industrial: Motor drives, PLC systems - Telecommunications: Base station power supplies, data center infrastructure - Renewable Energy: Solar inverters, wind turbine converters
| Manufacturer | Representative Product | Key Features |
|---|---|---|
| Littelfuse | 440 Series Ceramic Fuses | 1000V rating, 300kA breaking capacity |
| Bussmann | FWS-6 Class CC | Time-delay protection for industrial motors |
| TE Connectivity | Mini5Fuse | SMD 5x10mm package for space-constrained designs |
| Mitsubishi Electric | BF Series High-Rupture | 3-phase power system protection |
Key considerations: 1. Match rated current/voltage with circuit parameters 2. Coordinate breaking capacity with system fault levels 3. Select response time per load type (e.g., inrush current in motors) 4. Consider environmental factors (temperature, vibration) 5. Verify regulatory certifications (UL/IEC standards) Example: Selecting a 5x20mm F1A 250V fuse with 1500A breaking capacity for a 120W power supply.
Emerging developments include: - Miniaturization: Sub-2mm SMD fuses for wearable devices - Smart integration: IoT-enabled fuses with real-time monitoring - Material innovation: Biodegradable polymer enclosures - High-voltage specialization: 1500V DC fuses for photovoltaic systems - Hybrid solutions: Combined fuse-circuit breaker architectures