MIL-PRF-19500/580A
Symbol
(see
note 3)
CD
CH
HD
LC
LD
LL
LU
L
1
L
2
P
Q
r
TL
TW
α
Term 1
Term 2
Term 3
Inches
Min
.305
.240
.335
Dimensions
Millimeters
Min
7.75
6.10
8.51
Max
8.51
6.60
9.39
Notes
Max
.355
.260
.370
.200 BSC
.016
.500
.016
---
.250
.100
---
.029
.028
.021
.750
.019
.050
---
---
.050
.010
.045
.034
5.08 BSC
0.41
12.70
0.41
---
6.35
2.54
---
0.74
0.72
0.53
19.05
0.48
1.27
---
---
1.27
0.25
1.14
0.86
10
10, 11
11, 12
11, 12
11, 12
11, 12
9
8
13
7
6
10
45° BSC
Emitter
Base
Collector
NOTES:
1. Dimensions are in inches.
2. Metric equivalents are given in parentheses for general
information only.
3. Refer to applicable symbol list.
4. The US Government preferred system of measurement is
the metric SI system. However, this item was originally
designed using inch-pound units of measurement. In the
event of a conflict between the metric and inch-pound
units, the inch-pound units shall take precedence.
5. Lead number 1 is the emitter, lead number 2 is the
base, lead number 4 is omitted from this outline. The collector is number 3 and is electrically connected to the case.
6. Beyond r (radius) max, TW shall be held for a minimum length of 0.011 inch (0.28 mm).
7. TL measured from maximum HD.
8. Outline in this zone is not controlled.
9. CD shall not vary more than 0.010 inch (0.25 mm) in zone P. This zone is controlled for automatic handling.
10. Leads at gauge plane 0.054 + 0.001 - 0.000 inch (1.37 +0.03 - 0.00 mm) below seating plane shall be within 0.007 inch (0.18
mm) radius of true position (TP) at maximum material condition (MMC) relative to tab at MMC.
11. LU applies between L
1
and L
2
. LD applies between L
2
and LL minimum. Diameter is uncontrolled in L
1
and beyond LL
minimum.
12. All three leads.
13. r (radius) applies to both inside corners of tab.
FIGURE 1. Physical dimensions for (TO-39).
3
ETC [ ETC ]
