Today, countries around the world pose stricter environmental regulations, forcing automobile manufacturers to shift their focus onto production of environmentally-friendly vehicles. This new trend has led to a demand for the increased capacities of batteries in EVs, which are the key to achieve EVs with traveling performance as high as that of gas vehicles, and batteries with larger capacities need EV chargers (on-board chargers) with higher power output.
Ready to meet these needs, we offer the film capacitor ECWFG series featuring large current handling, high reliability, and high safety, contributing to high-power OBC production and safety improvement.
Features of ECWFG series
- Large current
- High reliability
- High safety
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Large current: The ECWFG series achieves larger allowable current that is two times as large as the allowable current of the ECWFE series (at 105℃).
Panasonic's original low membrane resistance vapor deposition technology reduces the ESR of the ECWFG series, enabling the ECWFG series to have larger allowable current that is two times as large as the allowable current of the ECWFE series (at 105℃), thus providing a solution to a problem of increasing load current in circuits.
Comparison in allowable current between the ECWFG series and the ECWFE series (conventional product) (105℃, 100 kHz) Capacitance ECWFE
(Conventional product)ECWFG ratio 1.0μF 1.7 Arms 3.1 Arms 182% 1.5μF 2.1 Arms 4.1 Arms 195% 2.2μF 2.5 Arms 5.2 Arms 208% * Both capacitors are DC 630 V rated products with a 22.5 mm pitch.
* To see comparison between the ECWFG series and standard products, click here! -
High reliability: The ECWFG series achieves high moisture resistance and high thermal shock resistance, conforming to requirements specified in AEC-Q200.
Panasonic's original exterior sealing technology gives the ECWFG series high moisture resistance and high thermal shock resistance, allowing it to conform to requirements specified in AEC-Q200. The product thus becomes an optimum automotive capacitor, which is required to be highly reliable.
- ＜For DC630V rated products＞
- ●Moisture resistance guarantee : 85℃, 85%RH, DC500V, 1000h
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●Thermal shock resistance guarantee : -55 ℃ / + 85 ℃, 1000 cycles
* For information about other rated voltage products, see specifications listed in a table below.
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High safety: The ECWFG series is provided with a security mechanism (fuse), which ensures the safety of the product (open failure mode).
Through a high-precision vapor deposition pattern technology, a fuse is properly placed on a deposit film so that the circuit is opened in its failure mode. This prevents a firing accident, fuming accident, etc., caused by short circuit, thereby keeping the product set sufficiently safe.
Fuse function 
Safety limit AC step-up test 
Fuse Function Technology of Panasonic Film Capacitors | Panasonic
In this video, we’ll review the Fuse function Technology that is built into Panasonic Film Capacitors.
ECWFG series specifications
| DC rated voltage | 600V | 630V | 700V | 800V | 1100V | |
|---|---|---|---|---|---|---|
| Reed pitch | 27.5 mm | 22.5 mm | 27.5 mm | 27.5 mm | 27.5 mm | 27.5 mm |
| Capacitance range | 2 to 12 µF | 1 to 3 µF | 1 to 4.7 µF | 1 to 4.7 µF | 2 to 8 µF | 1 to 5 µF |
| Capacitance tolerance |
±5% (J) ±10% (K) |
±5% (J) ±10% (K) |
±5% (J) ±10% (K) |
±5% (J) | ±5% (J) | ±5% (J) |
|
Allowable current (105℃,100kHz) |
1.7 to 4.4 Arms | 3.2 to 6.4 Arms | 2.7 to 6.4 Arms | 2.7 to 6.4 Arms | 2.1 to 4.4 Arms | 1.7 to 4.2 Arms |
| Category temperature range | -40℃ to +110℃ | |||||
| Safety | Open mode arises at the end of the service life. | |||||
| Thermal shock resistance | -55℃/+85℃, 1000cycles | |||||
| Moisture resistance |
85℃, 85%, 420V, 500h |
85℃, 85%, 500V, 1000h |
85℃, 85%, 500V, 1000h |
85℃, 85%, 560V, 500h |
85℃, 85%, 700V, 500h |
|
| Endurance |
125℃, 360V, 1000h |
125℃, 450V, 1000h |
125℃, 450V, 1000h |
125℃, 480V, 1000h |
125℃, 660V, 1000h |
|
|
Body shape (mm) [L×T×H] |
31.5x8.0x17.0 to 31.5x17.5x32.5 |
27.0x10.5x19.0 to 27.0x17.5x26.5 |
31.5x 9.5x18.0 to 31.5x17.5x32.5 |
31.5x9.5x18.0 to 31.5x17.5x32.5 |
31.5x10.5x21.0 to 31.5x17.5x32.5 |
31.5x10.5x21.0 to 31.5x18.5x35.0 |
Examples of applications of the ECWFG series
Examples of proposed applications of the ECWFG series
EV Charger AC/DC Converter Output Capacitor
Using capacitors handling large current reduces the number of the capacitors making up a board, thus saving space on the board.
