Resistor 0.5W 3.9M ohm (5 pcs)

The Resistor 0.5W 3.9M ohm is a through-hole fixed resistor with a resistance of 3.9 MΩ and a power rating of 0.5 W, supplied in a pack of 5. It draws only about 1.3 µA from a 5 V supply, so it is useful wherever a high-value resistor must sense, bias or discharge without loading the circuit.

Resistor 0.5W 3.9M ohm Specifications

• Resistance: 3.9 MΩ (3,900,000 ohms), a standard E12 value
• Power rating: 0.5 W (1/2 W)
• Current at 5 V: about 1.28 µA
• RC time constant with 1 µF: about 3.9 s
• Type: fixed resistor, axial leads, through-hole
• Fits: breadboards, perfboards and PCBs
• Pack size: 5 pieces

Resistor 0.5W 3.9M ohm Applications

• Bleeder resistors that slowly discharge capacitors after power is removed
• High-impedance voltage dividers for monitoring supply voltages
• Capacitive touch sensors with the Arduino CapacitiveSensor library
• Feedback and bias resistors in op-amp circuits

What's in the Box

• 5 × 3.9 MΩ 0.5 W resistors

Tip: With a value this high, the 0.5 W limit is only reached at well over a thousand volts, so the resistor's maximum working voltage is the practical limit; check it before using it across high voltages. Keep the board clean and dry, as dirt and moisture can leak current around a resistor this large.

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