3.2.4.1 Passive devices

Passive device footprints shall be A B where A (all dimensions um) =:

  • Surface mount un-polarised
    • Imperial rectangular footprint number e.g. 0603
  • Surface mount polarised
    • CASE x where x = Tant case type A to X
  • Through-hole polarised capacitors
    • Radial               CAPPR<pin spacing>P<body diameter>B<lead radius>L
    • Axial                 CAPPA<pin spacing>P<body diameter>B<lead radius>L
    • Tant bead         CAPTB<pin spacing>P<body diameter>B<lead radius>L
    • Tant rectangle  CAPTR<pin spacing>P<body diameter>B<lead radius>L
  • Through-hole non-polarised capacitors
    • Axial                 CAPA<pin spacing>P<body diameter>B<lead radius>L
    • Rectangular      CAPR<pin spacing>P<body width>W<body length>B<lead radius>L
    • Disc                  CAPD<pin spacing>P<body diameter>B<lead radius>L
  • Through-hole 3 pin filter capacitors
    • Rectangular      CAP3PIN<pin spacing>P<body width>B<lead radius>L
  • Through-hole axial resistors horizontal mount
    • RESAH<pin spacing>P<body diameter/width>B<lead radius>L
  • Through-hole axial resistors vertical mount
    • RESAV<height inc lead curve>P<body diameter/width>B<lead radius>L
  • Resistor networks
    • 1206NET4 SD
    • SIL<number of pins>C<pin pitch um>P
    • SOIC16NET SD
  • Resistor preset potentiometers shall be RESPOT<M multi-turn or S single-turn<pin style> (pin style from MIL spec):
    • W = top adjust with SIL pins on 2.54mm pitch
    • X = end adjust with SIL pins on 2.54mm pitch
    • Y = top adjust with delta pins on 2.54mm pitch
    • Z = end adjust with delta pins on 2.54mm pitch
  • B = Density
    • SD
    • HD
    • CUST (custom for some special instances)