MIL-PRF-19500/426H
UB
Dimensions
Symbol
Inches
Millimeters
Note
Min
Max
Min
Max
BH
.046
.056
1.17
1.42
BL
.115
.128
2.92
3.25
BW
.085
.108
2.16
2.74
CL
.128
3.25
CW
.108
2.74
LL1
.022
.038
0.56
0.97
LL2
.017
.035
0.43
0.89
LS1
.036
.040
0.91
1.02
LS2
.071
.079
1.80
2.01
LW
.016
.024
0.41
0.61
r
.008
.203
r1
.012
.305
r2
.022
.559
NOTES:
1. Dimensions are in inches.
2. Millimeters are given for general information only.
3. Hatched areas on package denote metallized areas.
4. Lid material: Kovar.
5. Pad 1 = Base, Pad 2 = Emitter, Pad 3 = Collector, Pad 4 = Shielding connected to the lid.
6. In accordance with ASME Y14.5M, diameters are equivalent to φx symbology.
FIGURE 2. Physical dimensions, surface mount (2N4957UB version).
4
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