Resistor 0.5W 3.9k ohm (5 pcs)

The Resistor 0.5W 3.9k ohm is a through-hole fixed resistor with a resistance of 3.9 kΩ and a power rating of 0.5 W, sold in a pack of 5. It is a handy mid-range value for transistor base resistors, voltage dividers, low-current LED indicators and pull-up resistors in Arduino and ESP32 projects.

Resistor 0.5W 3.9k ohm Specifications

• Resistance: 3.9 kΩ (3,900 ohms)
• 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 3.9k ohm Applications

• Base resistors for NPN transistors driven from microcontroller pins
• Voltage dividers and level shifting
• Low-current LED indicators
• Pull-up and pull-down resistors for inputs
• Electronics education and prototyping

What's in the Box

• 5 × 3.9 kΩ 0.5 W resistors

Tip: Resistors have no polarity, so they can be fitted either way round. With 3.9 kΩ the 0.5 W limit is reached at about 44 V across the resistor. On 5 V, a red LED in series with 3.9 kΩ draws under 1 mA, which gives a soft glow suited to standby indicators.

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