Jegatron

This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.
====== Capacitors ======
Common voltage ratings: 6.3, 10, 16, 25, 50, 100, 250, 500

Av någon anledning skippas prefixet nano av traditionella skäl:

820pF, 1000pF, 10000pF, 0.1µF, 1µF

===== Ceramic =====
[[https://en.wikipedia.org/wiki/Ceramic_capacitor#MLCC_capacitance_ranges|Max capacitance per package size]]

Det finns något som kallas soft termination, det innebär mekaniskt mjuk anslutning genom att ett lager hartz finns med i kapslingen för att minska känsligheten för bland annat termisk stress.

Class 2 och Class 3 dielectrics använder följande tabell

^ First character    ^^ Second character ^^ Third character    ^^
^ Letter ^ Low Temp   ^ Digit ^ High temp ^ Letter ^ Change     ^
| X      | -55°C      | 2     | 45°C      | D      | ± 3.3%  |
| Y      | -30°C      | 4     | 68°C      | E      | ± 4.7%  |
| Z      | +10°C      | 5     | 85°C      | F      | ± 7.5%  |
|        |            | 6     | 105°C     | P      | ±  10%  |
|        |            | 7     | 125°C     | R      | ±  15%  |
|        |            | 8     | 150°C     | S      | ±  22%  |
|        |            | 9     | 200°C     | T      | +  22% / - 33%  |
|        |            |       |           | U      | +  22% / - 56%  |
|        |            |       |           | V      | +  22% / - 82%  |

Vanliga är X5R och X7R

Class 1 dielectrics använder följande tabell

^ First character    ^^ Second character       ^^ Third character          ^^
^ Temp coefficient   ^^ Coefficient multiplier ^^ Tolerance of coefficient ^^
^ Letter ^ α 10<sup>-6</sup>/K  ^ Digit ^ Multiplier      ^ Letter ^  ppm/K          ^
| C      | 0.0        | 0     | -1              | G      | ± 30            |
| B      | 0.3        | 1     | -10             | H      | ± 60            |
| L      | 0.8        | 2     | -100            | J      | ± 120           |
| A      | 0.9        | 3     | -1000           | K      | ± 250           |
| M      | 1.0        | 4     | +1              | L      | ± 500           |
| P      | 1.5        | 6     | +10             | M      | ± 1000          |
| R      | 2.2        | 7     | +100            | N      | ± 2500          |
| S      | 3.3        | 8     | +1000           |        |                 |
| T      | 4.7        |       |                 |        |                 |
| V      | 5.6        |       |                 |        |                 |
| U      | 7.5        |       |                 |        |                 |


===== Sizes =====

Minimum size for X7R ceramics

^  (V)   ^ 50   ^ 25   ^ 16   ^ 10   ^ 6.3  ^
^  (µF)  ^                              ^^^^^
|  22.00 | 2220 | 1210 | 1210 | 1206 | 1206 |
|  10.00 | 1210 | 1206 | 1206 | 0805 | 0805 |
|   4.70 | 1210 | 0805 | 0805 | 0805 | 0805 |
|   2.20 | 1206 | 0805 | 0805 | 0603 | 0603 |
|   1.00 | 0805 | 0603 | 0603 | 0603 | 0402 |
|   0.47 | 0805 | 0603 | 0603 | 0603 | 0603 |
|   0.22 | 0603 | 0603 | 0402 | 0402 | 0402 |
|   0.10 | 0402 | 0402 | 0402 | 0402 | 0402 |

====== Resources ======
[[https://youtu.be/ZAbOHFYRFGg|Good talk about capacitors from KEMET]]

[[https://ksim3.kemet.com/|K-Sim 3]] -- Simulator for many of the parameters of KEMET capacitors

[[https://ds.murata.co.jp/simsurfing/index.html?lcid=en-us|Sim Surfing]] -- Muratas simulator