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

Product Description The 680 Ohm 1/4 Watt Resistor is a versatile passive component designed for reliable current regulation and signal conditioning. These resistors feature a 5% tolerance, making them a standard choice for prototyping, LED current limiting in 12V-24V systems, and base biasing in transistor circuits. With a 0.25W power rating, they provide stable resistance in a compact axial form factor, ensuring the safety of sensitive semiconductors in your electronic designs.

Key Features

• Ideal for 12V-24V Systems: Frequently used to safely limit current for LEDs or as a bias resistor in higher voltage transistor circuits.

• Axial Through-Hole Leads: Long, flexible, tin-plated leads ensure a secure fit in solderless breadboards and easy soldering on PCBs.

• 4-Band Color Identification: Clearly marked with Blue, Gray, Brown, Gold bands for instant manual sorting and value verification.

• Stable Carbon Film Tech: Provides consistent performance with low electrical noise and environmental stability.

• Flame Retardant Coating: Features a protective lacquer layer to enhance safety and prevent oxidation in humid conditions.

Technical Details

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

• Overload Surge Capacity: Capable of withstanding short-duration peak surges up to 500V without failure.

• Operating Temperature: Functions accurately within a thermal range of -55°C to +155°C.

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

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

• Lead Material: Solder-plated copper-clad steel leads for superior conductivity and strong solder joints.

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

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

• Environmental Standards: Fully RoHS compliant and lead-free for modern electronic assembly requirements.

• Low Parasitic Inductance: Suitable for high-speed logic signal conditioning and basic RF filtering.

• Moisture Protection: Sealed with multiple epoxy layers to prevent oxidation of the carbon element in humid conditions.

• Audio Performance: Low current-noise characteristics make them suitable for basic audio signal conditioning.

• Solderability: Meets industrial standards for both manual soldering and automatic wave soldering processes.

• Voltage Coefficient: Maintains resistance stability even under fluctuating voltage levels.

• Reliability: Designed to fail open-circuit during extreme overloads rather than shorting to protect neighboring components.