Resistor 0.25W 30 ohm (10 pcs)

The Resistor 0.25W 30 ohm is a through-hole fixed resistor with a resistance of 30 Ω and a power rating of 0.25 W (1/4 W), sold in a pack of 10. Low values like 30 Ω are used where only a small voltage drop is wanted: MOSFET gate resistors, series damping on signal lines and simple constant-current circuits.

Resistor 0.25W 30 ohm Specifications

• Resistance: 30 Ω (30 ohms)
• Power rating: 0.25 W (1/4 W)
• Value series: standard E24 value
• Colour code: orange, black, black (4-band) or orange, black, black, gold (5-band), followed by the tolerance band
• Maximum current: about 91 mA at the full 0.25 W (I = √(P / R))
• Type: fixed resistor, axial leads, through-hole
• Pack size: 10 pieces

Resistor 0.25W 30 ohm Applications

• Gate resistors between a microcontroller or driver and a MOSFET gate, to limit charging current and reduce ringing
• LM317 constant-current source: 1.25 V / 30 Ω gives about 42 mA
• Series damping resistors on fast digital lines
• Current limiting where only a small voltage is left across the resistor
• Electronics education and prototyping

What's in the Box

• 10 × 30 Ω 0.25 W resistors

Tip: With 30 Ω, the 0.25 W limit is reached with only about 2.7 V across the resistor, so never connect it directly across a 5 V or 12 V supply. Work out the power with P = I² × R and keep it to about half the rating for a cool, long-lasting part.

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