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-0157 Rev. 2 (101305)

Page 3 of 6

PACKAGE DIMENSIONS

NOTES:

1

Dimension 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 (0.18mm)

radius of true position (TP) at maximum material condition (MMC) relative to tab at MMC. The device may be measured by

direct methods.

7

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 For “L” suffix devices, dimension LL is 1.50 (38.10mm) minimum, 1.75 (44.45mm) maximum.

FIGURE 1. Physical dimensions for 2N4029 (TO-18).

Dimensions

Symbol

Inches

Millimeters

Notes

Min

Max

Min

Max

CD

.178

.195

4.52

4.95

CH

.170

.210

4.32

5.34

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

.050

1.27

7, 8

.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

α

45° TP

6