Shenzhen Zenithsun Electronics Tech.CO.,LTD
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Formed 1/8W to 5W Carbon Film Fixed Resistor,bulk package
Structure:
1.ZENITHSUN carbon film resistor is a thin carbon layer that is sputtered (vacuum deposition) on a cylindrical, high purity, ceramic core.The deposited carbon film is artificially aged by keeping it for a long period at a low temperature. This results in a better accuracy for the resistor.
2.On both ends of carbon film a metal cover is pressed with the connection leads.
3.The desired resistance is achieved by cutting a spiral shaped slot in the thin metal layer.
4.ZENITHSUN CF resistor is covered with several coating layers that are baked individually. The coating protects against moisture and mechanical stresses.
5.The resistor value is marked by color code bands.
Feature:
1.Reliability.
2.Low capacitance
3.Low inductance, good high frequency performance.
4.Low noise.
Application:
The typical uses for ZENITHSUN carbon film resistors are in high voltage and high temperature applications. Operating voltages up to 15 kV with a nominal temperature of 350 °C are feasible for carbon film resistors.. Example uses include high voltage power supplies, radars, x-rays, and lasers.
Specifications:
| Test Item | Test Condition | Performance |
| Temperature coefficient | Test the resistance value at normal temperature and normal temperature added 100℃,calculated per ℃ resistance value change rate. | -1000ppm/℃ to +350ppm/℃ |
| Temp.Range | / | -55℃~155℃ |
| Short Time Overload | 2.5×rated voltage or Max.overload voltage(get the lower)for 5seconds | △R≤±(1%R0+0.05Ω) |
| Pulse overload | At 4×rated voltage or Max.pulse overload voltage (get the lower) for 5seconds | △R≤±(1%R0+0.05Ω) |
| Resistance to soldering heat | Immerge into the 350±10℃ tin stove for 2-3seconds | △R≤±(0.5%R0+0.05Ω) |
| Solderability | Immerge into the 245±5℃ tin stove for 2-3seconds | The soldering area is over 95% |
| Load Life in humidity | Overload rated voltage or Max.working voltage (get the lower) for 1000hours (1.5 hours on and half-hour off) at the 40±2℃ and 90%-95% relative humidity. | △R≤±(2%R0+0.1Ω) |
| Load Life in heat | Overload rated voltage or Max.working voltage (get the lower)for 1000hours (1.5 hours on and half-hour off) at the 70±2℃. | △R≤±(2%R0+0.05Ω) |
| Insulation Voltage | DC 1/4W 1/2W :250V 1W 2WS:350V 2W 3WS 3W:500V | no breakdown,no flashover |
| Temperature Cycle | At -55℃ for 30min, then at+25℃ for 10-15 min, then at +155% for 30 min, then at +25℃ for 10-15 min, total 5 cycles. | △R≤±(5%R0+0.05Ω) |
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