Resistor 0.5W 18 ohm (5 pcs)

The Resistor 0.5W 18 ohm is a low-value through-hole fixed resistor with a resistance of 18 Ω and a power rating of 0.5 W, sold in a pack of 5. Low values like this are used where current is high, such as limiting the current of power LEDs, damping MOSFET gates or acting as a small test load on the bench.

Resistor 0.5W 18 ohm Specifications

• Resistance: 18 Ω
• Power rating: 0.5 W (1/2 W)
• Maximum current at 0.5 W: about 166 mA (P = I² × R)
• Series: standard E12 value
• Type: fixed resistor, axial leads, through-hole
• Fits: breadboards, perfboards and PCBs
• Pack size: 5 pieces

Resistor 0.5W 18 ohm Applications

• Series resistor for 1 W LEDs on 5 V supplies
• Gate resistors for MOSFETs driven by a microcontroller or gate driver
• Current limiting for small loads
• Small dummy loads for testing low-power supplies
• Electronics repair and prototyping

What's in the Box

• 5 × 18 Ω 0.5 W resistors

Tip: Always check the power with P = I² × R. For example, 100 mA through 18 Ω makes 0.18 W of heat, which is fine, but the 0.5 W limit is reached at about 166 mA (3 V across the resistor).

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