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Cap markings unfamiliar

Discussion in 'Electronic Components' started by DaveC, Feb 12, 2007.

  1. DaveC

    DaveC Guest

    This is a small (8x3 mm) yellow axial "blob" w/hard (ceramic?) shiny
    exterior. Markings:
    FC4
    9116
    Presume the latter is date code. What is the value? A Google turned up
    nothing I could find that might identify this code. Surely tolerance markings
    follow the value markings...

    Ideas?

    Thanks,
     
  2. Eeyore

    Eeyore Guest

    Many ceramic multi-layer caps were made like that. I associate Kemet and AVX with
    blue and yellow bodies but forget which way round.

    The markings sound totally unhelpful. Usually there might be something like 104
    (100nF) to denote capacitance.

    Graham
     
  3. Ross Herbert

    Ross Herbert Guest

    FC4 is most likely OEM proprietary marking. All axial ceramic caps I
    have come across have the value marked on them. Are you able to
    measure its value?
     
  4. Gibbo

    Gibbo Guest

    In EU we write 1.2 Ohms as 1R2, 1.2kOhms as 1k2, 0.1 Ohms as 0R1 or R1.
    So obviously it's 0.4femtocaps.

    Sorry.
     
  5. Tim Williams

    Tim Williams Guest

    C = coulombs. It's a charged cap -- be careful, you might accidentially
    bleed out the 0.4 femtocoulombs! ;-)

    Incidentially, 0.4fC is about 2500 electrons.

    Tim
     
  6. MassiveProng

    MassiveProng Guest

    Hey with today's modern quantum dot detectors used in the lab
    instruments, it'll have no problem. ;-]
     
  7. Tom Bruhns

    Tom Bruhns Guest

    Are you sure it's a capacitor?

    Surface-mount caps are commonly marked with a two-character code, and
    a third character indicates the manufacturer. So for your case, "F"
    would be the manufacturer, and "C4" would be C=1.2, times 10^4, pF =
    12000pF = 12nF. But don't count on it. That system is used where
    there's not enough room for more, and in the case of your part,
    there's obviously room for more digits. It could just as well be some
    abbreviation of an in-house part number.

    Cheers,
    Tom
     
  8. Franc Zabkar

    Franc Zabkar Guest

    Flux Capacitor ?

    - Franc Zabkar
     
  9. MassiveProng

    MassiveProng Guest


    Leave it to a guy with a name like Zakbar to come up with
    that one. :-]

    I get images of white headed old men talking calmly...

    You're... one of THEM aren't you!?
     
  10. Frank

    Frank Guest

    N N N Resistor with value in three digit format. e.g. "473" Value =
    47*1000 = 47k Ohms.
    N N N N 1 % Resistor with value in four digit format. e.g. "4752" Value
    = 475*100 = 47k5 Ohms.
    N N L 1 % Resistor with value in code, see below.
    L N Capacitor with value in code, see below.
    L N N Aluminum electrolytic with voltage rating in code then value, see
    table below, e.g. F47 = 0.47µF 25 Volts .
    N L N Aluminum electrolytic, see table below, e.g. 4E7 = 4.7µF 16 Volts.
    N N L Aluminum electrolytic with value in code then Voltage rating, see
    table below, e.g. 47D = 47µF 10 Volts.
    N = Number, L = Letter.
    Surface Mount Resistors, EIA-96 Code, only for 1% range
    Code Value Code Value Code Value Code Value Code Value
    01 100 21 162 41 261 61 422 81 681
    02 102 22 165 42 267 62 432 82 698
    03 105 23 165 43 267 63 442 83 715
    04 107 24 174 44 280 64 453 84 732
    05 110 25 178 45 287 65 464 85 750
    06 113 26 182 46 294 66 475 86 768
    07 115 27 187 47 301 67 487 87 787
    08 118 28 191 48 309 68 499 88 806
    09 121 29 196 49 316 69 511 89 825
    10 124 20 200 30 324 40 523 50 845
    11 127 31 205 51 332 71 536 91 866
    12 130 32 210 52 340 72 549 92 887
    13 133 33 215 53 348 73 562 93 909
    14 137 34 221 54 357 74 576 94 931
    15 140 35 226 55 365 75 590 95 953
    16 143 36 232 56 374 76 604 96 976
    17 147 37 237 57 383 77 619
    18 150 38 243 58 392 78 634
    19 154 39 249 59 402 79 649
    20 158 40 255 60 412 80 665
    The third character is the multiplier.
    _ _Y 0.01 _ _A 1 _ _C 100 _ _E 10,000
    _ _X 0.1 _ _B 10 _ _D 1,000 _ _F 100,000
    So a 1% surface mount resistor with the code,
    20C =158 *100 =15800 = 15.800k =15k8 Ohms

    Surface Mount Capacitor Component Markings.
    Capacitor code e.g. "S4" See table below S = 4.7, 4 = x10000. Value =
    47000pF or 47nF.
    Code Value Code Value Code Value Code Value
    A 1.0 L 2.7 X 7.5 a 2.5
    B 1.1 M 3.0 Y 8.2 b 3.5
    C 1.2 N 3.3 Z 9.1 d 4.0
    D 1.3 Q 3.9 e 4.5
    E 1.5 R 4.3 Multipliers f 5.0
    F 1.6 S 4.7 0 x1 m 6.0
    G 1.8 T 5.1 1 x10 n 7.0
    H 2.0 U 5.6 2 x100 p 3.6
    J 2.2 V 6.2 3 x1000 t 8.0
    K 2.4 W 6.8 4 x10,000 y 9.0
    Aluminum electrolytic
    Code Value Code Value Code Value Code Value Code Value
    Code Value
    C 6.3 Volts D 10 Volts E 16 Volts F 25 Volts G 40 Volts
    H




    This is a small (8x3 mm) yellow axial "blob" w/hard (ceramic?) shiny
    exterior. Markings:
    FC4
    9116
    Presume the latter is date code. What is the value? A Google turned up
    nothing I could find that might identify this code. Surely tolerance
    markings
    follow the value markings...

    Ideas?

    Thanks,
     
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