WH series 1000uF 100V

The WH series 1000µF 100V capacitor is rated for 1.8A RMS ripple current at 100kHz and 125°C ambient temperature. At lower temperatures, the ripple current capability increases - approximately 2.2A at 105°C and 2.8A at 85°C. The ripple current rating is frequency-dependent, with higher ratings at lower frequencies. For example, at 120Hz the rating is approximately 0.9A RMS. When using multiple capacitors in parallel, the total ripple current capability is the sum of individual ratings. Always ensure the actual ripple current in your application does not exceed the rated value to maintain specified lifetime. For high-ripple applications, consider using multiple capacitors in parallel or selecting a larger capacitance value.

For applications exceeding 1.8A ripple current, use multiple capacitors in parallel or select higher capacitance models.

The WH series is specifically designed and qualified for automotive applications with full AEC-Q200 compliance. The capacitors have passed rigorous automotive reliability testing including: Temperature cycling from -40°C to +125°C for 1000 cycles, Mechanical shock testing per MIL-STD-202 Method 213, Vibration testing per MIL-STD-202 Method 204, High temperature and humidity bias testing at 85°C/85% RH for 1000 hours. The 125°C temperature rating makes these capacitors suitable for under-hood applications including engine control units, LED headlamp drivers, and electric power steering systems. The long 10,000-hour lifetime at 125°C ensures reliable operation throughout the vehicle's service life. Full PPAP documentation is available for automotive production. Samwha's IATF 16949 certification ensures consistent quality for automotive-grade capacitors.

Request AEC-Q200 qualification reports and PPAP documentation for automotive production projects.

The ESR (Equivalent Series Resistance) of the WH series 1000µF 100V capacitor varies with frequency: At 100kHz (typical switching frequency): 0.12Ω typical, 0.15Ω maximum, At 20kHz: 0.18Ω typical, At 120Hz: 0.45Ω typical. The ESR decreases with increasing frequency up to approximately 100kHz, then remains relatively flat. Temperature also affects ESR - at -40°C, ESR is approximately 3x the room temperature value, while at 125°C, ESR is approximately 1.5x the room temperature value. Lower ESR is beneficial for high-frequency applications as it reduces power dissipation (P = I² × ESR) and improves filtering effectiveness. The WH series uses a low-resistance electrolyte and optimized foil etching to achieve industry-leading ESR performance for high-temperature capacitors.

For high-frequency applications, verify ESR at your operating frequency. Lower ESR reduces heating and improves efficiency.

Yes, WH series capacitors can be connected in parallel to increase total ripple current capability. When paralleling capacitors: Total capacitance adds directly (Ctotal = C1 + C2 +...), Total ripple current capability adds directly (Itotal = I1 + I2 +...), ESR reduces proportionally (ESRtotal = ESR/n for n identical capacitors). For example, two WH series 1000µF 100V capacitors in parallel provide 2000µF total capacitance, 3.6A total ripple current capability, and approximately 0.06Ω ESR at 100kHz. Best practices for paralleling: Use identical part numbers for balanced current sharing, Keep trace lengths as equal as possible, Ensure adequate spacing for heat dissipation, Consider using current-sharing resistors for large numbers of capacitors. Paralleling is commonly used in high-power applications such as motor drives and large power supplies where single capacitors cannot handle the required ripple current.

For high-ripple applications, parallel multiple WH series capacitors. Use identical parts and equal trace lengths for best results.

The WH series 1000µF 100V capacitor has a maximum leakage current of 0.01CV or 3µA, whichever is greater. At 100V, this equals 1000µF × 0.01 × 100V = 100µA maximum. Typical leakage current is much lower, usually 10-30µA when new. Leakage current decreases with time as the oxide layer stabilizes during operation. During the first 100 hours of operation, leakage current may be 2-5x the steady-state value. After 500 hours, leakage current typically stabilizes at 20-50% of the initial value. Temperature significantly affects leakage current - it approximately doubles for every 10°C increase in temperature. At 125°C, leakage current may be 10-20x the room temperature value. High leakage current can indicate capacitor degradation or damage. If leakage current exceeds specifications after the stabilization period, the capacitor should be replaced.

Allow 100 hours of operation for leakage current to stabilize. Measure at operating temperature for accurate assessment.

Samwha recommends the following soldering conditions for WH series radial lead capacitors: Wave soldering - Preheat: 100-130°C for 60-90 seconds, Solder pot temperature: 250-260°C maximum, Soldering time: 3-5 seconds maximum. Reflow soldering is not recommended for radial lead aluminum electrolytic capacitors due to thermal stress. Hand soldering - Iron temperature: 350°C maximum, Soldering time: 3 seconds maximum per lead. Important precautions: Do not apply excessive mechanical stress to leads during soldering, Allow capacitors to cool naturally after soldering (do not force cool), Clean flux residue according to capacitor specifications (some capacitors are not washable), Verify that soldering temperature does not exceed capacitor ratings. The WH series uses high-temperature materials that can withstand normal soldering processes, but excessive heat can damage the capacitor and reduce lifetime.

Follow recommended soldering conditions. Use wave soldering for production. Avoid reflow soldering for radial electrolytics.