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Pricelist: Retail Price (B2C) Pricelist
18 Ohm 0.25W Carbon Film Resistor - 5% Tolerance (Pack of 5)

18 Ohm 0.25W Carbon Film Resistor - 5% Tolerance (Pack of 5)

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ComponentSpecification
Resistance Value18 Ohms (18Ω)
Power Rating0.25 Watts (1/4 Watt)
Tolerance±5% (J Type)
ConstructionCarbon Film
Package TypeThrough-Hole (Axial)
QuantityPack of 5 Units
Price
₹ 8.47 ₹ 8.47
(Tax included)

Product Description The 18 Ohm 1/4 Watt Resistor is a high-quality passive component designed for low-resistance applications. These resistors feature a 5% tolerance, ensuring consistent performance in power management and signal processing. With a standard 0.25W power rating, they are ideal for providing small voltage drops, current sensing, and protecting low-voltage components in both hobbyist and professional electronic projects.

Key Features

  • Low Resistance Accuracy: Perfect for precision current limiting in low-voltage rails.

  • Standard Through-Hole Leads: Axial leads allow for easy mounting on breadboards or permanent PCBs.

  • Clear Identification: Marked with a 4-band color code (Brown, Gray, Black, Gold) for rapid manual sorting.

  • Stable Carbon Film Construction: Offers high reliability with low electrical noise and environmental resistance.

  • Flame Retardant Coating: Built with a protective layer to prevent combustion during electrical overloads.

Technical Details

  • Maximum Working Voltage: Rated for stable operation up to 250V in standard AC/DC circuits.

  • Overload Surge Voltage: Capable of withstanding short-duration pulses up to 500V.

  • Dielectric Strength: Provides insulation protection up to 500V AC between the resistive element and the surroundings.

  • Operating Temperature: Maintains rated resistance within a range of -55°C to +155°C.

  • Temperature Coefficient: Typically rated at ±450 ppm/°C, ensuring minimal drift during heat cycles.

  • Lead Material: Solder-plated copper-clad steel leads for superior wetting and mechanical strength.

  • Resistance Stability: Engineered to stay within ±3% of the nominal value after 1,000 hours of continuous load.

  • Miniature Body Size: Compact axial dimensions (approx. 2.3mm x 6.5mm) for high-density component layouts.

  • Environmental Compliance: Fully RoHS compliant and lead-free for modern manufacturing.

  • High Frequency Capability: Low parasitic inductance makes it suitable for basic RF filtering and high-speed logic.

  • Standard Tolerance: Class J (±5%) provides a cost-effective balance for most electronic applications.

  • Moisture Protection: Sealed with multiple layers of lacquer to prevent oxidation in humid conditions.

Prototyping and Engineering Tips from Robogears

  • 9V Battery Use: In 9V battery applications, an 18 Ohm resistor can be used as a small current-limiting resistor for high-current status LEDs or in transistor biasing.

  • 18650 Monitoring: Use this as a current shunt in series with an 18650 cell to measure low-level discharge currents via an ADC pin.

  • IC & Driver Support: Essential for protecting the digital output pins of microcontrollers when driving low-impedance transistor gates.

  • Related Products: We recommend pairing these with our Half-Size Breadboards and 22 AWG Jumper Wires.

Package Includes

  • 5 x 18 Ohm 1/4 Watt Carbon Film Resistors.

Disclaimer Images are for illustration purposes only. Always calculate the power dissipation in your circuit to ensure it stays below 0.25W to prevent component failure.