Lead Form Dimensions
Data Sheets
TO-220 Type 56 — R or L Package
TO-220 Type 58 — R or L Package
Replaces G.E. Type 6, Motorola Lead Form 3, RCA 6221
Mounting Tab
Common to
MT2 / Anode
for Non-isolated
R Package
Mounting Tab
Common to
MT2 / Anode
for Non-isolated
R Package
B
A
A
Gate / Trigger
MT2 / Anode
B
MT2 / Anode
MT1 / Cathode
Gate
C
MT2 / Anode
C
MT2 / Anode
MT1 / Cathode
D
Inches
Millimeters
Inches
Millimeters
Dimension
MIN
MAX
MIN
MAX
Dimension
MIN
MAX
0.590
0.130
0.202
MIN
MAX
14.99
3.30
A
B
C
D
0.175
0.542
0.167
0.355
4.45
13.77
4.24
A
B
C
0.570
0.120
0.172
14.48
3.05
4.37
0.582
0.207
0.395
14.78
5.26
10.03
5.13
9.02
TO-220 Type 57 — R Package
TO-220 Type 59 — R or L Package
Similar to TO-66, Gate-Cathode Reversed
Mounting Tab
Common to
MT2 / Anode
for Non-isolated
R Package
MT2 / Anode
B
A
MT2 /
Anode
B
Gate
MT1 / Cathode
Gate
A
D
C
C
MT1 / Cathode
MT2 / Anode
Inches
Millimeters
Inches
Millimeters
Dimension
MIN
MAX
0.725
0.598
MIN
17.40
14.17
9.53
MAX
18.42
15.19
Dimension
MIN
MAX
0.070
0.590
0.422
MIN
MAX
A
B
C
D
0.685
0.558
0.375
0.250
A
B
C
0.040
0.570
0.340
1.02
14.48
8.64
1.78
14.99
10.72
6.35
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M2 - 6
©2002 Teccor Electronics
Thyristor Product Catalog
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