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-0021 Rev. 2 (100698)

Page 3 of 3

PACKAGE DIMENSIONS

NOTES:

1. Dimensions are in inches.

2. Millimeters are given for general information only.

3. These dimensions should be measured at points .050 to .055 inch (1.27 to 1.40 mm) below seating plane. When gauge is not

used, measurement will be made at seating plane.

4. Both terminals.

5. At both ends.

6. Two holes.

7. The collector shall be electrically connected to the case.

8. LD applies between L1 and LL. Lead diameter shall not exceed twice LD within L1.

9. In accordance with ASME Y14.5M, diameters are equivalent to

φ symbology.

10. Lead 1 is the emitter, lead 2 is the base, collector is the case.

FIGURE 1. Physical dimensions, TO-66 (2N3740, 2N3741)

Dimensions

Ltr

Inches

Millimeters

Notes

Min

Max

Min

Max

CD

.620

15.75

9

CH

.250

.340

6.35

8.64

HT

.050

.075

1.27

1.91

HR

.350

8.89

.115

.145

2.92

3.68

5

LD

.028

.034

0.71

0.86

4, 8, 9

LL

.360

.500

9.14

12.70

4, 8

.050

1.27

4, 8

MHD

.142

.152

3.61

3.86

6, 9

MHS

.958

.962

24.33

24.43

PS

.190

.210

4.83

5.33

3

.093

.107

2.36

2.72

3

S

.570

.590

14.48

14.99

3