MIL-PRF-19500/508D
Ltr
Dimensions
Notes
Inches
Millimeters
Min
Max
Min
Max
CD
.875
22.23
CH
.250
.360
6.35
9.14
HR
.495
.525
12.57
13.33
4
.131
.188
3.33
4.78
4
HR1
HT
.060
.135
1.52
3.43
LD
.038
.043
0.97
1.09
4, 6
LL
.312
.500
7.92
12.7
.050
1.27
6
L1
MHD
.151
1.65
3.83
41.91
4
MHS
1.177
1.197
29.90
30.40
PS
.420
.440
10.67
11.18
3
.205
.225
5.21
5.72
3
PS1
.655
.675
16.64
17.15
S1
Notes
1, 2, 5, 7
1, 2, 5, 7
NOTES:
1. Dimensions are in inches.
2. Millimeters are given for general information only.
3. These dimensions should be measured at points .050 inch (1.27 mm) +.005 inch (0.13 mm)
-.000 inch (0.00 mm) below seating plane. Measurement will be made at the seating plane.
4. Two places.
5. The seating plane of the header shall be flat within .001 inch (0.03 mm) concave to .004 inch (0.10 mm)
convex inside a .930 inch (23.62 mm) diameter circle on the center of the header and flat within
.001 inch (0.03 mm) concave to .006 inch (0.15 mm) convex overall.
6. Lead diameter shall not exceed twice LD within L1.
7. Lead designation, shall be as follows:
8. In accordance with ASME Y14.5M, diameters are equivalent to φx symbology.
Lead number
Bipolar transistor
1
Emitter
2
Base
Case
Collector
* FIGURE 1. Physical dimensions (TO-204 similar to TO-3) - Continued.
4
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