As environmental regulations compliance measures have been made stricter in each country, the demand for higher levels of durability and safety of individual components is increasing in the environmentally friendly vehicle market, which is expected to achieve substantial growth in future. Our company's power source noise prevention capacitors ECQUA (automotive) series used in EV chargers (OBC) adopt a design that ensures high reliability and high end-of-life safety, thereby contributing to equipment reliability and safety.
Features of ECQUA (for automotive) series
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High reliability: High humidity resistance conforming to AEC-Q200
The company's proprietary enclosure sealing technology and aluminum vapor deposition achieve high-dimensional humidity resistance along with compliance to AEC-Q200, thereby perfectly meeting automotive applications requiring high reliability.
- Moisture resistance guarantee
- ・AC275V rated product : 85℃, 85%RH, AC240V, 1000h and 85℃, 85%RH, AC275V, 500h
- ・AC310V rated product : 85℃, 85%RH, AC275V, 1000h
Moisture resistance load test comparison
〇 ECQUA (Al deposition + high humidity resistance enclosure)
Al deposition along with a high humidity resistance enclosure provides moisture resistance and reduced deterioration of characteristics〇 Zn deposition and general-purpose packaging
Oxidation of the Zn deposition membrane reduces capacitance and increases tan δ (resistance component)Moisture resistance load test：85℃ 85% 240VAC (AEC-Q200 compliant AC275V/3.3μF)
High-frequency step-up loading test comparison after humidity resistance stress application
(Humidity resistance stress conditions : 60℃ 95％ 275VAC 1000h)
〇 ECQUA (Al deposition + high humidity resistance enclosure)
Reduced tan δ deterioration by humidity resistance stress leads to a small temperature rise in the high-frequency loading〇 Zn deposition and general-purpose packaging
Excessive tan δ deterioration caused by humidity resistance stress increases temperature rise in the high-frequency loading, thereby increasing the chance of short-circuit breakage.High-frequency step-up loading test
(capacitor surface temperature rise comparison)(AEC-Q200 compliant AC275V/0.47μF)
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High safety: The ECQUA 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.
ECQUA (For Automotive) series specifications
| AC rated voltage | 275V | |||
|---|---|---|---|---|
| Reed pitch | 15.0 mm | 22.5 mm | 27.5 mm | 37.5 mm |
| Capacitance range | 0.1 to 0.33 µF | 0.47 to 1 µF | 1.5 to 4.7 µF | 3.3 to 10 µF |
| Capacitance tolerance | ±10% (K), ±20% (M) | |||
| Category temperature range | -40℃ to +110℃ | |||
| Safety | Open mode arises at the end of the service life. | |||
| Thermal shock resistance | -40℃/+85℃, 1000cycles | |||
| Acquired safety standard | Class X2 (UL, CSA, EN, IEC) | |||
| Moisture resistance |
85℃, 85%, AC240V, 1000h 85℃, 85%, AC275V, 500h |
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| Endurance | 110℃, AC344V, 1000h | |||
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Size (mm) [L×T×H] |
17.5x5.0x12.0 to 17.5x9.0x16.0 |
26.0x8.5x15.0 to 26.0x12.0x19.0 |
31.0x12.0x22.0 to 31.0x23.0x33.0 |
41.0x15.0x30.0 to 41.0x28.0x42.5 |
