MIL-PRF-19500/347B
Dimensions
Symbol
Inches
Millimeters
Note
Min
Max
Min
Max
CD
.305
.335
7.75
8.51
CH
.240
.260
6.10
6.60
HD
.335
.370
8.51
9.40
LC
.200 TP
5.08 TP
7
LD
.016
.019
0.41
0.48
8,9
LL
See note 14
LU
.016
.019
0.41
0.48
8,9
L1
.050
1.27
8,9
L2
.250
6.35
8,9
P
.100
2.54
7
Q
.030
0.76
5
TL
.029
.045
0.74
1.14
3,4
TW
.028
.034
0.71
0.86
3
r
.010
0.25
10
α
45° TP
45° TP
7
NOTES:
1. Dimensions are in inches.
2. Millimeters are given for general information only.
3. Beyond r (radius) maximum, TW shall be held for a minimum length of .011 (0.28 mm).
4. Dimension TL measured from maximum HD.
5. Body contour optional within zone defined by HD, CD, and Q.
6. CD shall not vary more than .010 inch (0.25 mm) in zone P. This zone is controlled for automatic handling.
7. Leads at gauge plane .054 +.001 -.000 inch (1.37 +0.03 -0.00 mm) below seating plane shall
be within .007 inch (0.18 mm) radius of true position (TP) at maximum material condition (MMC) relative to
tab at MMC.
8. Dimension LU applies between L1 and L2. Dimension LD applies between L2 and LL minimum. Diameter
is uncontrolled in L1 and beyond LL minimum.
9. All three leads.
10. The collector shall be internally connected to the case.
11. Dimension r (radius) applies to both inside corners of tab.
12. In accordance with ASME Y14.5M, diameters are equivalent to φx symbology.
13. Lead 1 = emitter, lead 2 = base, lead 3 = collector.
14. For transistor types 2N3253 and 2N3444, dimension LL = 1.5 inches (38.10 mm) min. and 1.75 inches
(44.45 mm) max. For transistor types 2N3253S and 2N3444S, dimension LL = .5 inch (12.70 mm) min. and
.750 inch (19.05 mm) max.
FIGURE 1. Physical dimensions (similar to TO-39, TO-5).
3
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