Jianghai CBB 131 Series Capacitor
DC-Link Metallized Polypropylene Film CapacitorDistributor's Insight
FAE Review: The CBB 131 represents the future of DC-Link technology. For any new high-frequency design using SiC or GaN switches, a film capacitor is almost mandatory, and the CBB 131 is a top performer. Its ultra-low ESR minimizes self-heating, and its self-healing property provides a level of reliability that electrolytic capacitors cannot match. We recommend this for any application where long-term performance and efficiency are non-negotiable, such as solar inverters and EV on-board chargers.
Description & Specifications
The CBB 131 series is constructed with metallized polypropylene film, offering outstanding electrical properties for DC-Link applications. It is designed to withstand high ripple currents and provides a stable capacitance over a wide frequency and temperature range. The self-healing nature of the film allows it to gracefully handle transient overvoltage events, making it exceptionally robust. Its rectangular case and sturdy terminals are optimized for easy mounting and low-inductance bus bar connections.
| Key Specifications | |
|---|---|
| Series | CBB 131 |
| Type | Metallized Polypropylene Film, DC-Link |
| Key Feature | Low ESR, Self-Healing, High Frequency |
| Operating Temperature | -40°C to +105°C |
| Rated Voltage Range | 450 Vdc to 1200 Vdc |
| Capacitance Range | 10 µF to 200 µF |
| Key Property | Excellent Self-Healing Characteristics |
Frequently Asked Questions (FAQ)
Q: What does "self-healing" mean for a film capacitor?
A: If a microscopic weak point in the dielectric film experiences a breakdown, the immense heat from the arc instantly vaporizes the thin metal layer around the fault. This isolates the fault area, preventing a short circuit and allowing the capacitor to continue operating, usually with a negligible loss of capacitance. This makes them far more reliable than electrolytic capacitors, which do not have this property.
Q: Why is the capacitance range lower than for electrolytic capacitors?
A: Film capacitors have a lower capacitance density than electrolytic capacitors. To achieve the same capacitance, a film capacitor needs to be physically larger. However, its superior ripple current handling means that you often need less total capacitance from a film capacitor to achieve the same level of DC bus stability in a high-frequency application.
