Resistor 0.5W 20 ohm (5 pcs)

The Resistor 0.5W 20 ohm is a through-hole fixed resistor with a low resistance of 20 Ω and a power rating of 0.5 W, sold in a pack of 5. Low values like 20 Ω are used where real current flows: limiting current for bright LEDs, gate resistors for power MOSFETs, current sensing and small series resistors in power and audio circuits.

Resistor 0.5W 20 ohm Specifications

• Resistance: 20 Ω
• Power rating: 0.5 W (1/2 W)
• Type: fixed resistor, axial leads, through-hole
• Fits: breadboards, perfboards and PCBs
• Pack size: 5 pieces

Resistor 0.5W 20 ohm Applications

• Series gate resistors for power MOSFETs
• Current limiting for high-brightness and infrared LEDs
• Simple current sensing by measuring the voltage across the resistor
• Series resistors for small speakers and buzzers
• Damping and snubber networks in power circuits

What's in the Box

• 5 × 20 Ω 0.5 W resistors

Tip: Resistors have no polarity, so they can be fitted either way round. With only 20 Ω, the 0.5 W limit is reached at about 3.2 V across the resistor (about 158 mA); connected straight across 5 V it would dissipate 1.25 W and overheat, so always check P = V² / R.

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