TECHNICAL DATA SHEET
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Website: http://www.microsemi.com
T4-LDS-0093 Rev. 2 (101243) Page 3 of 4
PACKAGE DIMENSIONS
NOTES:
1. Dimension are in inches.
2. Millimeters are given for general information only.
3. Beyond r (radius) maximum, TH shall be held for a minimum length of .011 inch (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 or by the gauge and gauging procedure shown in figure 2.
7. Dimension LU applies between L1 and L2. Dimension LD applies between L2 and LL 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 φx symbology.
12. Lead 1 = emitter, lead 2 = base, lead 3 = collector.
FIGURE 1. Physical dimensions (similar to TO-18).
Dimensions
Symbol Inches Millimeters Notes
Min Max Min Max
CD .178 .195 4.52 4.95
CH .170 .210 4.32 5.33
HD .209 .230 5.31 5.74
LC .100TP 2.54 TP 6
LD .016 .021 0.41 0.53 7, 8
LL .500 .750 12.70 19.05 7, 8
LU .016 .019 0.41 0.48 7, 8
L1 .050 1.27 7, 8
L2 .250 6.35 7, 8
P .100 2.54
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
α 45° TP 45° TP 6