TECHNICAL DATA SHEET
6 Lake Street, Lawrence, MA 01841 Gort Road Business Park, Ennis, Co. Clare, Ireland
1-800-446-1158 / (978) 620-2600 / Fax: (978) 689-0803 Tel: +353 (0) 65 6840044 Fax: +353 (0) 65 6822298
Website: http://www.microsemi.com
T4-LDS-0011 Rev. 3 (101764) Page 3 of 4
NOTES:
1. Dimensions are in inches.
2. Millimeters are given for general information only.
3. Symbol TL is measured from HD maximum.
4. Details of outline in this zone are optional.
5. Symbol CD shall not vary more than .010 (0.25 mm) in zone P. This zone is controlled for automatic handling.
6. Leads at gauge plane .054 inch (1.37 mm) +.001 inch (0.03 mm) -.000 inch (0.00 mm) below seating plane shall be
within .007 inch (0.18 mm) radius of true position (TP) relative to tab. Device may be measured by direct methods or by
gauge.
7. Symbol LD applies between L1 and L2. Dimension LD applies between L2 and LL minimum.
8. Lead designation, depending on device type, shall be as follows:
9. Lead number three is electrically connected to case.
10. Beyond r maximum, TW shall be held for a minimum length of .011 inch (0.28 mm).
11. Symbol r applied to both inside corners of tab.
12. In accordance with ASME Y14.5M, diameters are equivalent to φx symbology.
FIGURE 1. Physical dimensions (TO-39)
PACKAGE DIMENSIONS
Dimensions
Symbol Inches Millimeters Note
Min Max Min Max
CD .305 .355 7.75 9.02 5
CH .240 .260 6.10 6.60
HD .335 .370 8.51 9.40 3
LC .200 TP 5.08 TP 6
LD .016 .021 0.41 0.53 7
LL .500 .750 12.70 19.05 7
LU .016 .019 0.41 0.48 7
L
1
.050 1.27 7
L
2
.250 6.35 7
TL .029 .045 0.74 1.14 3
TW .028 .034 0.71 0.86 10
P .100 2.54 5
Q .050 1.27 4
r .010 0.25 10, 11
α
45° TP 45° TP
6
Notes 1, 2, 8, 9 1, 2, 8, 9
Lead number TO-39
1
2
3
Emitter
Base
Collector