250R120-R2U Datasheet, PDF (7/7 Pages) Littelfuse – POLY-FUSE® Resettable PTCs Radial Leaded > 250R Series

POLY-FUSE^® Resettable PTCs
Radial Leaded > 250R Series
Tape and Ammo Specifications
Devices taped using EIA468-B/IE286-2 standards. See table below and Figure 1 for details.
Dimension
EIA Mark
IEC Mark
Dimensions
Dim. (mm)
Tol. (mm)
Carrier tape width
W
)PME
EPXO
UBQF
XJEUI
W₄
Top distance between tape edges
W₆
Sprocket hole position
W₅
4QSPDLFU
IPMF
EJBNFUFS
D₀
Abscissa to plane (straight lead)
H
Abscissa to plane (kinked lead)
H₀
Abscissa to top
H₁
Overall width without lead protrusion
C₁
Overall width with lead protrusion
C₂
-FBE
QSPUSVTJPO
L₁
Protrusion of cut out
L
1SPUSVTJPO
CFZPOE
IPMEoEPXO
UBQF
l₂
4QSPDLFU
IPMF
QJUDI
3o3
P₀
4QSPDLFU
IPMF
QJUDI
3
P₀
Pitch tolerance
%FWJDF
QJUDI
3o3
%FWJDF
QJUDI
3
Tape thickness
t
Tape thickness with splice
t₁
Splice sprocket hole alignment
Body lateral deviation
Δh
Body tape plane deviation
Δp
0SEJOBUF
UP
BEKBDFOU
DPNQPOFOU
MFBE
P₁
W
18
o


W₀
11
min.
W₂
3
NBY
W₁
9
o


D₀
4
o


H
18.5
o

H₀
16
o

H₁
32.2
NBY
42.5
NBY
43.2
NBY
l₁
1.0
NBY
L
11
NBY
l₂
Not specified
P₀
12.7
o

P₀
25.4
o

20
consecutive.
o

12.7
25.4
t
0.9
NBY
2.0
NBY
0
o

Δh
0
o

Δp
0
o

P₁
3.81
o

-FBE
TQBDJOH
F
F
5.1
o

%JGGFST
GSPN
&*"
4QFDJGJDBUJPO
Tape and Ammo Diagram
Δh
Δh
Figure 1
Δh
H1
A1
L
A
I2
L1
P0
© 2011 Littelfuse, Inc
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/250R.html for current information.
Reference plane
F
B
H₀
W4 ^W5
W
H1 C1
H C2
D0
Direction of unreeling
Cross section A - B
t
103
Revised: August 31, 2011
Δp
250R Series