Resistor 0.5W 680 ohm (5 pcs)

The Resistor 0.5W 680 ohm is a through-hole fixed resistor with a resistance of 680 Ω and a power rating of 0.5 W, sold in a pack of 5. The 680 Ω value is a common choice for limiting LED current in 9 V and 12 V circuits, driving optocouplers and transistors, and building simple voltage dividers.

Resistor 0.5W 680 ohm Specifications

• Resistance: 680 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 680 ohm Applications

• Current limiting for LEDs on 9 V and 12 V supplies
• Input resistors for optocoupler LEDs
• Base resistors for transistors
• Voltage dividers and test loads
• Electronics education and prototyping

What's in the Box

• 5 × 680 Ω 0.5 W resistors

Tip: Resistors have no polarity, so they can be fitted either way round. With 680 Ω the 0.5 W limit is reached at about 18 V across the resistor, so check the power (P = V² / R) at higher voltages. A red LED on 12 V through 680 Ω draws about 15 mA.

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