Littelfuse Qxx25xx Series - Manual (Page 9)

139
Revised: 09/23/13
©2013 Littelfuse, Inc
Specifications are subject to change without notice.
Teccor ® brand Thyristors
25 Amp Standard & Alternistor (High Commutation) Triacs
Qxx25xx & Qxx25xHx Series
Dimensions — TO-218X (J Package) — Isolated Mounting Tab
Dimensions — TO-3 (P Package) Fastpak — Isolated Mounting Tab
G
R
Y
H
D
C
K
B
A
E
F
N
T
M P
J
L
S
V
U (diameter)
W X
MT1
MT2
T c
Measurement
Point
Gate
Note: Maximum torque to
be applied to mounting tab
is 8 in-lbs. (0.904 Nm).
Z
MT2
Gate MT1
Φ G
5 - Φ N
Φ J (MT1, MT2)
F
H
E
C
B
A
D
Q
O
R
S
P
U
T
I
M L
T C Measuring Point
Thickness off all three copper-alloy terminals is .032" (0.81 mm).
W V
Φ K (Gate)
Dimension
Inches Millimeters
Min Max Min Max
A 0.810 0.835 20.57 21.21
B 0.610 0.630 15.49 16.00
C 0.178 0.188 4.52 4.78
D 0.055 0.070 1.40 1.78
E 0.487 0.497 12.37 12.62
F 0.635 0.655 16.13 16.64
G 0.022 0.029 0.56 0.74
H 0.075 0.095 1.91 2.41
J 0.575 0.625 14.61 15.88
K 0.256 0.264 6.50 6.71
L 0.220 0.228 5.58 5.79
M 0.080 0.088 2.03 2.24
N 0.169 0.177 4.29 4.49
P 0.034 0.042 0.86 1.07
R 0.113 0.121 2.87 3.07
S 0.086 0.096 2.18 2.44
T 0.156 0.166 3.96 4.22
U 0.164 0.165 0.410 0.420
V 0.603 0.618 15.31 15.70
W 0.000 0.005 0.00 0.13
X 0.003 0.012 0.07 0.30
Y 0.028 0.032 0.71 0.81
Z 0.085 0.095 2.17 2.42
Dimension
Inches Millimeters
Min Max Min Max
A 1.531 1.543 38.90 39.20
B 1.177 1.185 29.90 30.10
C 0.843 0.850 21.40 21.60
D 0.780 0.795 19.80 20.20
E 0.783 0.791 19.90 20.10
F 0.874 0.906 22.20 23.00
G 0.161 0.169 4.10 4.30
H 0.386 0.465 9.80 11.80
I 0.508 0.587 12.90 14.90
J 0.079 0.087 2.00 2.20
K 0.047 0.055 1.20 1.40
L 0.307 0.319 7.80 8.10
M 0.372 0.396 9.45 10.05
N 0.043 0.059 1.10 1.50
O 0.315 0.331 8.00 8.40
P 0.098 0.106 2.50 2.70
Q 0.846 0.886 21.50 22.50
R 0.244 0.256 6.20 6.50
S 0.106 0.130 2.70 3.30
T (MT1) 0.321 0.329 8.15 8.35
T (MT2) 0.321 0.329 8.15 8.35
T (Gate) 0.220 0.228 5.60 5.80
U (MT1) 0.246 0.254 6.25 6.45
U (MT2) 0.246 0.254 6.25 6.45
U (Gate) 0.183 0.191 4.65 4.85
V 0.120 0.130 3.05 3.30
W 0.175 0.185 4.45 4.70
Maximum torque to be applied to mounting tab is 8 in-lbs (0.904Nm).