Metallized film USES material discrimination
Note: The use of metallized zinc-plated aluminum layer, due to the different materials used, is a big taboo for horizontal audio capacitors. Because the plastic film is galvanized aluminum, its zinc activity is relatively high, no matter how the process is guaranteed (the product flow and the process may have moisture contact during the process), the outsourcing Mara tape cannot completely isolate the environment. Moisture, even if a high-purity epoxy resin is used, the resin itself also contains a certain amount of moisture, which will cause the capacity to decrease after a period of use and cause hidden dangers in the finished product.
| Coating material Comprehensive comparison |
Aluminized coating |
Metallized galvanized aluminum |
|
Name in Asia |
MET/MPE |
MPT/MPP |
|
Name in Europe and America |
MKT/ME |
MKP/MP |
|
Dissipation |
＜1.0%
|
＜1.0% |
Specifications of Metallized Film Capacitor
| Reference Standard | GB/T 10190 (IEC 60384-16) | |||||||
| Climatic Category | 40/105/21 | |||||||
| Rated temperature | 85℃ | |||||||
| Operating temperature | -40℃~105℃(+85℃ to +105℃: decreasing factor 1.25% per ℃ for VR(dc)) | |||||||
| Rated Voltage | 100V/160V, 250V, 400V, 630V, 1000V,1250V | |||||||
| Capacitance Range | 0.0010 ~ 150mF | |||||||
| Capacitance Tolerance | ±3%(H), ±5%(J), ±10% (K), ±20% | |||||||
| Voltage Proof | 1.6UR (5s) | |||||||
| Dissipation Factor | ≤10×10-4(20℃, 1kHz) | |||||||
| Insulation Resistance | ≥50 000MW, CR≤0.33mF≥15 000s, CR>0.33mF (20℃,100V,1min) | |||||||
|
Maximum Pulse Rise Time (dv/dt) If the actual working voltage U is lower than the rated voltage UR, the capacitor can work at higher dv/dt. In this way, the allowable value of dv/dt is the value shown on the right multiplied by UR/U. |
UR(V) |
dv/dt (V/μs) |
||||||
|
L=12 |
L=15 |
L=19 |
L=27 |
L=32 |
L=42 |
L=56 |
||
|
100/160 |
150 |
110 |
80 |
60 |
50 |
35 |
20 |
|
|
250 |
300 |
220 |
150 |
110 |
90 |
60 |
30 |
|
|
400 |
460 |
330 |
250 |
180 |
120 |
80 |
45 |
|
|
630 |
600 |
440 |
300 |
220 |
150 |
100 |
60 |
|
|
1000 |
800 |
550 |
400 |
300 |
200 |
150 |
80 |
|
|
1250 |
1000 |
750 |
580 |
400 |
300 |
200 |
100 |
|
Post time: Oct-15-2020