2-watt fusible resistor is a type of resistor that works as both a current-limiting resistor and a fuse. It’s designed to handle up to 2 watts of power under normal operation, but it will blow (open the circuit) if the current exceeds a safe limit, protecting the circuit from damage.
🔎 Key Characteristics:
- Power Rating: 2W (can dissipate up to 2 watts of power)
- Fusible Function: Acts like a fuse — if the current exceeds a certain level, the resistor will overheat and break the circuit.
- Resistance Range: Usually available in low to moderate resistance values (e.g., 1Ω to 100Ω).
- Material: Often made from metal oxide or carbon film for stability and safety.
- Tolerance: Typically ±5% or ±10%
⚡ How It Works:
- Normally works as a resistor, limiting current according to its resistance value.
- If excessive current flows due to a short circuit or fault, the resistor heats up and burns out like a fuse, opening the circuit to prevent further damage.
✅ Common Uses:
- Power Supplies – Protects against overcurrent conditions.
- LED Drivers – Limits inrush current and protects circuits.
- Audio Equipment – Prevents speaker and amplifier damage.
- Battery Chargers – Stops dangerous current surges.
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