MIL-PRF-19500/116L
4.5.6.1 Lead spacing for leaded devices:
LS = Lead spacing = .375 inch (9.53 mm) as defined on figure 6.
FIGURE 6. Mounting conditions.
4.5.6.2 Temperature reference (Tr ) unleaded devices (UB, UR suffix). The temperature reference point shall be
the hottest portion of the external surface. As an alternate, the temperature of a stream of liquid used to cool the
device during the test may be used as the temperature reference point.
12