DC-Link 100uF/800V
Jianghai DC-Link film capacitor, 100uF/800V, low ESR, high ripple current, for PV inverters.
Product Overview
Description
Jianghai DC-Link 100uF/800V is a metallized polypropylene film capacitor designed for photovoltaic inverters and industrial inverters. Uses cylindrical aluminum case with environmental resin filling for excellent heat dissipation and reliability.
Product rated voltage 800VDC, nominal capacitance 100uF, max ripple current up to 25Arms at 70C, dv/dt up to 100V/us, ESR as low as 2mOhm, ESL less than 20nH. Insulation resistance greater than or equal to 30000MOhm, expected lifespan 100,000 hours at 70C.
Compared to aluminum electrolytic capacitors, film capacitors have longer lifespan, lower ESR, better high-frequency characteristics, especially suitable for PV inverters requiring 20+ year lifespan. Self-healing characteristics ensure automatic recovery after local breakdown, improving system reliability.
Product Series
DC
Primary Application
Film Capacitors
Key Features
- High efficiency and reliability
- Optimized for industrial applications
- Comprehensive technical support
- Available from stock
Specifications
Applications
Motor Drives
Variable frequency drives and servo motor controls
Power Supplies
SMPS, UPS, and industrial power systems
Renewable Energy
Solar inverters and wind turbine converters
EV Charging
Electric vehicle charging stations
FAE Expert Insights
"DC-Link film capacitors are Jianghai's key products, with obvious trend replacing aluminum electrolytic capacitors in PV inverters. 100uF/800V is suitable for 10-20kW single-phase or three-phase inverters. Recommend working voltage not exceeding 720V (90% of rated voltage) to ensure long lifespan. Note to use appropriate torque during installation to avoid mechanical stress."
Long lifespan 100,000 hours, low ESR 2mOhm, suitable for PV inverters
— Jianghai FAE Team, BeiLuo
Frequently Asked Questions
How does the self-healing mechanism work in DC-Link film capacitors?
Jianghai DC-Link film capacitors use metallized polypropylene film with self-healing properties. When a localized dielectric breakdown occurs due to overvoltage or defect, the thin metal electrode (typically 10-50nm thick) around the breakdown point vaporizes due to the arc energy, effectively isolating the defect. This creates a small cleared area (typically <1mm) without catastrophic failure. The capacitor continues operating with slightly reduced capacitance (typically <0.1% per event). This is a major advantage over aluminum electrolytic capacitors which can fail short-circuit.
Self-healing makes film capacitors ideal for high-reliability applications where maintenance access is difficult, such as PV inverters and remote installations.
What is the maximum dv/dt rating and why is it important for DC-Link 100uF/800V?
DC-Link 100uF/800V has a dv/dt rating of 100V/us (volts per microsecond). This parameter is critical because: 1) High dv/dt from IGBT switching can damage capacitors with insufficient ratings; 2) Excessive dv/dt causes partial discharges and corona effects, degrading the dielectric; 3) The ESL (equivalent series inductance) combined with high dv/dt creates voltage spikes. For IGBT applications with switching speeds of 5-50kHz, ensure the capacitor dv/dt rating exceeds the actual circuit dv/dt by at least 20% margin.
For high-frequency IGBT applications, select capacitors with appropriate dv/dt ratings. Contact FAE for dv/dt calculations based on your switching characteristics.
What are the installation torque requirements for DC-Link film capacitors?
DC-Link film capacitors with threaded studs require proper mounting torque: 1) M8 thread: 3.0-4.0 Nm; 2) M12 thread: 8.0-10.0 Nm. Over-tightening can deform the case, damage internal connections, or crack the resin fill. Under-tightening may cause poor electrical contact and overheating at the connection. Always use a calibrated torque wrench and follow the specific torque values in the datasheet for your capacitor model.
Use calibrated torque tools for installation. Consider spring washers to maintain contact pressure under thermal cycling.