Resistor 100 ohm 20W

The Resistor 100 ohm 20W is a high-power fixed resistor with a resistance of 100 Ω and a power rating of 20 W. It is made for circuits where a normal small resistor would overheat, such as dummy loads for testing power supplies, discharging capacitors, pre-charge circuits and current limiting at higher voltages.

Resistor 100 ohm 20W Specifications

• Resistance: 100 Ω
• Power rating: 20 W
• Current at full power: about 0.45 A (I = √(P / R))
• Voltage at full power: about 45 V across the resistor (V = √(P × R))
• Type: fixed high-power resistor

Resistor 100 ohm 20W Applications

• Dummy loads for testing power supplies, chargers and DC-DC converters
• Safely discharging large capacitors
• Pre-charge and inrush current limiting in motor controllers and inverters
• Bleeder and braking resistors
• Current limiting in higher-voltage test circuits

What's in the Box

• 1 × 100 Ω 20 W resistor

Tip: A 20 W resistor gets very hot at full power. For continuous use keep it near half its rating (about 10 W, or 32 V across it), give it space for air to flow, and keep it away from plastic parts and wire insulation. At 12 V it dissipates only 1.44 W (P = V² / R).

Orders placed before 14:00 are ready for pickup the same day. Delivery across Lebanon usually takes 1–3 working days.