Resistor 0.5W 3 ohm (5 pcs)

The Resistor 0.5W 3 ohm is a through-hole fixed resistor with a resistance of 3 Ω and a power rating of 0.5 W, sold in a pack of 5. Because its resistance is so low, it is mostly used in the current path of a circuit: as a shunt for measuring current, as a small series resistor that limits current in low-voltage designs, or as a replacement part when repairing power and charger boards.

Resistor 0.5W 3 ohm Specifications

• Resistance: 3 Ω
• Power rating: 0.5 W (1/2 W)
• Current at full power: about 0.4 A (I = √(P / R))
• Type: fixed resistor, axial leads, through-hole
• Fits: breadboards, perfboards and PCBs
• Pack size: 5 pieces

Resistor 0.5W 3 ohm Applications

• Current measurement with an op-amp, INA-type sensor or ADC input
• Current limiting in low-voltage, higher-current circuits
• Light test loads for single cells and small power supplies
• Spare parts for power, charger and audio board repairs
• Electronics education and prototyping

What's in the Box

• 5 × 3 Ω 0.5 W resistors

Tip: At 3 Ω the 0.5 W limit is reached at only about 1.2 V across the resistor, or about 0.4 A through it. Always check the power with P = I² × R, and step up to a 1 W or larger resistor if your current is higher.

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