Littelfuse 250R Series - Manual (Page 7)

103
Revised: August 31, 2011
POLY-FUSE ® Resettable PTCs
© 2011 Littelfuse, Inc 250R Series
Radial Leaded > 250R Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/250R.html for current information.
250R S
eries
Dimension EIA Mark IEC Mark
Dimensions
Dim. (mm) Tol. (mm)
Carrier tape width W W 18 o
)PMEEPXOUBQFXJEUI W
4
W
0
11 min.
Top distance between tape edges W
6
W
2
3 NBY
Sprocket hole position W
5
W
1
9 o
4QSPDLFUIPMFEJBNFUFS D
0
D
0
4 o
Abscissa to plane (straight lead) H H 18.5 o
Abscissa to plane (kinked lead) H
0
H
0
16 o
Abscissa to top H
1
H
1
32.2 NBY
Overall width without lead protrusion C
1
42.5 NBY
Overall width with lead protrusion C
2
43.2 NBY
-FBEQSPUSVTJPO L
1
l
1
1.0 NBY
Protrusion of cut out L L 11 NBY
1SPUSVTJPOCFZPOEIPMEoEPXOUBQF l
2
l
2
Not specified
4QSPDLFUIPMFQJUDI3o3 P
0
P
0
12.7 o
4QSPDLFUIPMFQJUDI3 P
0
P
0
25.4 o
Pitch tolerance
20
consecutive.
o
%FWJDFQJUDI3o3 12.7
%FWJDFQJUDI3 25.4
Tape thickness t t 0.9 NBY
Tape thickness with splice t
1
2.0 NBY
Splice sprocket hole alignment 0 o
Body lateral deviation Δh Δh 0 o
Body tape plane deviation Δp Δp 0 o
0SEJOBUFUPBEKBDFOUDPNQPOFOUMFBE
P
1
P
1
3.81 o
-FBETQBDJOH F F 5.1 o
%JGGFSTGSPN&*"4QFDJGJDBUJPO
Tape and Ammo Specifications
Devices taped using EIA468-B/IE286-2 standards. See table below and Figure 1 for details.
Tape and Ammo Diagram
A B
A
1
L
1
P
0
D
0
F
L
W
4
H
0
I
2
H
1
W
5
W
Reference plane
Δh Δh
H
1
H
C
1
C
2
Δh Δp
Direction of unreeling
Cross section A - B
t
Figure 1