MIL-PRF-19500/545K
Dimensions
Symbol
Inches
Millimeters
Notes
Min
Max
Min
Max
CD
.305
.335
7.75
8.51
6
TO-205
CH
.240
.260
6.10
6.60
HD
.335
.370
8.51
9.40
LC
.200 TP
5.08 TP
7
LD
.016
.021
0.41
0.53
8, 9
LL
See notes 8, 9, 12, 13
LU
.016
.019
0.41
0.48
8, 9
L1
.050
1.27
8, 9
L2
.250
6.35
8, 9
Q
.050
1.27
6
TL
.029
.045
0.74
1.14
4, 5
TW
.028
.034
0.71
0.86
3
r
.010
0.25
11
45° TP
45° TP
α
7
P
.100
2.54
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 inch (0.28 mm).
4. TL measured from maximum HD.
5. Outline in this zone is not controlled.
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. LU applied between L1 and L2. 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 electrically and mechanically connected to the case.
11. r (radius) applies to both inside corners of tab.
12. In accordance with ASME Y14.5M, diameters are equivalent to φx symbology.
13. For transistor types 2N5151 and 2N5153, LL is .5 inch (13 mm) minimum, and .75 inch (19 mm) maximum.
14. For transistor types 2N5151L and 2N5153L, LL is 1.5 inch (38 mm) minimum and 1.75 inch (44.4 mm)
maximum.
15. Lead designation, depending on device type, shall be as follows: lead numbering; lead 1 = emitter,
lead 2 = base, and lead 3 = collector.
FIGURE 1. Physical dimensions (TO-205).
3
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