CF carbon film resistor is the most widely used axial through-hole fixed resistor in electronics industry. It is famous for outstanding cost performance, mainly used for current limiting, voltage divider and bleed circuits where high precision and low noise are not mandatory. Compared with MF metal film resistors, carbon film resistors help reduce BOM cost for mass-production consumer products.Guangdong Qingda Electronic supplies full-range CF carbon film resistors. Overseas and Hong Kong orders are handled by Qingda Industrial Co., Limited, with full export documents and cross-border delivery.
Carbon film resistors use high-purity alumina ceramic rod as substrate. Carbon film is deposited by vacuum pyrolysis. Laser spiral grooves define target resistance. Metal end caps and tinned leads are assembled, then protected by epoxy coating with standard color bands.
Material comparison:
CF Carbon film: low cost, higher noise, negative TCR, for general circuits
MF Metal film: NiCr alloy film, low noise, tight tolerance, precision signal circuits
MOF Metal oxide film: stronger surge withstand, for power and high voltage bleed
Excellent cost advantage for mass production
Wide resistance range following E24 series
Robust epoxy coating, good moisture and solvent resistance
Standard axial through-hole, compatible with auto insertion, bulk or tape packaging
Operating temperature: -55℃ ~ +155℃
Good voltage withstand for ordinary low & medium voltage circuits
Important note: Carbon film resistors feature relatively large TCR, high current noise and obvious long-term drift. They are NOT recommended for precision sampling, weak signal measurement and RF microwave circuits. Choose MF metal film for precision, MOF or MELF for surge resistance.
Rated power: 1/16W, 1/8W, 1/4W, 1/2W, 1W, 2W, 3W, 5WResistance range: 1Ω ~ 10MΩStandard tolerance: ±5%; ±2% / ±1% available by custom requestCustom resistance, lead forming and packaging supported, samples within 7 days.
Home appliances, chargers & adapters, LED lighting drivers, toys, remote controls, general power supply auxiliary circuits, relay drive, indicator lights, security boards and electronic teaching kits.
In-house testing for resistance sorting, overload, thermal cycle and humidity aging; test reports available.
One-stop BOM supply: CF carbon film resistors bundled with MF, MOF, high voltage glass glaze, MELF, RF microwave and manganin shunt resistors.
Dual-entity cross-border service: manufacturing in Zhuhai factory; Hong Kong delivery and global trade via Qingda Industrial Co., Limited with FOB/CIF terms, RoHS & MSDS documents.
Engineering support to distinguish CF / MF / MOF and avoid noise & drift issues.
Q: Carbon film vs metal film resistor?A: CF carbon film for simple current limiting & cost saving; MF metal film for precision divider and low-noise signal circuits.
Q: Can carbon film resistors be used for RF circuits?A: Not recommended due to high noise and poor high-frequency performance. Dedicated RF microwave resistors are required.
Q: Are carbon film resistors surge resistant?A: Limited surge capability. MOF metal oxide film resistors are preferred for pulse circuits.
Q: Hong Kong delivery available?A: Yes, arranged via Qingda Industrial Co., Limited.
Q: Is ±1% tolerance carbon film available?A: Custom order acceptable; standard stock is mainly ±5%.
Contact Guangdong Qingda Electronic Technology Co., Ltd. for domestic inquiries. Overseas & Hong Kong orders please contact Qingda Industrial Co., Limited.