MIL-PRF-19500/512K
Dimensions
Symbol
Notes
Inches
Millimeters
Min
Max
Min
Max
CD
.178
.195
4.52
4.95
CH
.170
.210
4.32
5.33
HD
.209
.230
5.31
5.84
LC
.100 TP
2.54 TP
6
LD
.016
.021
0.41
0.53
7, 8
LL
.500
.750
12.70
19.05
7, 8, 12
LU
.016
.019
0.41
0.48
7, 8
L1
.050
1.27
7. 8
L2
.250
6.35
7, 8
Q
.040
1.02
5
TL
.028
.048
0.71
1.22
3, 4
TW
.036
.046
0.91
1.17
3
R
.010
0.25
10
P
.100
2.54
45°TP
45°TP
α
6
NOTES:
1. Dimensions are in inches.
2. Millimeters equivalents 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. 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. The device may be measured by direct methods.
7. Dimension LU applies between L1 and L2. Dimension LD applies between L2 and minimum. Diameter is
uncontrolled in L1 and beyond LL minimum.
8. All three leads.
9. The collector shall be internally connected to the case.
10. Dimension r (radius) applies to both inside corners of tab.
11. In accordance with ASME Y14.5M, diameters are equivalent to θx symbology.
12. For "L" suffix devices, dimension LL is 1.50 (38.10 mm) minimum, 1.75 (44.45 mm) maximum.
FIGURE 1. Physical dimensions (type 2N4029) (TO-18).
3
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