Resistor 3.9 kΩ 1/4 W, Pack of 5
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Prices updated: 13 Oct 2026
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About this product
A pack of five 3.9 kΩ resistors rated at 1/4 W (0.25 W), suitable for voltage dividers, pull-up or pull-down circuits and bias networks in hobby electronics and prototypes. The listing does not specify tolerance, brand or composition.
Specifications
- Resistance
- 3.9 kΩ
- Power rating
- 1/4 W (0.25 W)
- Quantity
- 5 pcs
Frequently asked questions
Can I use this resistor to limit current for an LED?
Only for very low-current indicators. Use I = (Vsupply - Vf) / R. With a 5 V supply and a red LED (Vf about 2 V), 3.9 kΩ gives roughly 0.8 mA, which is too dim for most LEDs. Use a lower value for a brighter LED.
What is the maximum voltage I can apply across this resistor?
At full 1/4 W rating, the maximum voltage is about 31 V (V = √(P×R) = √(0.25 × 3900)). Keep the voltage across it below this value.