LF
,
LFF
,
RK26
radial metal film leaded resistors
features
•
Lead frame construction
•
High density assembly and excellent self-standing strength
•
Marking: Blue body color with color dot marking
for resistance and tolerance values
resistors
dimensions and construction
L
Trimming Line
Ceramic Core
D
Type
LF1/8
h
LF1/4
LF1/4L
Marking
t
Resistive
Film
End
Cap
H
.02±.004
(0.5±0.1)
LF1/2
LFF1/4
RK26B2E
L (max.)
.197
(5.0)
.295
(7.5)
.413
(9.6)
.285
(7.25)
.100
(2.54)
.098
(2.5)
Dimensions
inches
(mm)
D (max.)
P
H
.100±.008 .236±.039
(2.54±0.2) (6.0±1.0)
.200±.008
(5.08±0.2)
.118±.020
(3.0±0.5)
h (max.)
.200
(5.08)
t
.010
(0.25)
Insulation
Coating
P
Lead
Frame
.217±.020
.300±.012
(5.5±0.5)
(7.62±0.3)
.200±.012 .197±.039
(5.08±0.3) (5.0±1.0)
.217
(5.5)
.012
(0.3)
ordering information - LF, LFF
New Part #
LF1/8
Type
LF1/8
LF1/4
LF1/2
LFF1/4
2C
Power
Rating
1/8: 0.125W
1/4: 0.25W
1/4L: 0.25W
1/2: 0.5W
C
T.C.R.
(ppm/°C)
C: ±50
D: ±100
B: ±350
L: ±200
T
Termination
Material
T: Sn
L: SnPb
T
Taping
T: Taping
(1/8W,
1/4W only)
Blank: Bulk
A
Packaging
Ammo
(1/8, 1/4
only)
1000
Nominal
Resistance
±2%, ±5%: 2 significant
figures + 1 multiplier
“R” indicates decimal
on value <10Ω
±0.5%, ±1%: 3 significant
figures + 1 multiplier
“R” indicates decimal
on value <100Ω
D
Tolerance
D: ±0.5%
F: ±1%
G: ±2%
J: ±5%
ordering information - RK26
New Part #
RK26
Type
RK26
B
T.C.R.
(ppm/°C)
B: ±350
2E
Power
Rating
2E: 0.25W
T
Termination
Material
T: Sn
L: SnPb
T
Taping
T: Taping
Blank: Bulk
A
Packaging
Ammo
1003
Nominal
Resistance
±2%, ±5%: 2 significant
figures + 1 multiplier
“R” indicates decimal
on value <10Ω
±0.5%, ±1%: 3 significant
figures + 1 multiplier
“R” indicates decimal
on value <100Ω
F
Tolerance
F: ±1%
G: ±2%
J: ±5%
For further information
on packaging, please
refer to Appendix C.
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
6/23/05
KOA Speer Electronics, Inc.
• Bolivar Drive • P Box 547 • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
.O.
83
LF
,
LFF
,
RK26
resistors
radial metal film leaded resistors
applications and ratings
Part
Designation
Power
Rating
T.C.R.
(ppm/°C)
Max.
C: ±50
LF1/8
0.125W
D: ±100
L: ±200
C: ±50
LF1/4
LF1/4L
0.25W
D: ±100
L: ±200
C: ±50
LF1/2
0.5W
D: ±100
L: ±200
LFF1/4
RK26B2E
0.25W
0.25W
C: ±50
D: ±100
B: ±350
—
—
10 - 100k
10 - 100k
—
250V
500V
500V
700V
-55°C
to
+155°C
10 - 1M
10 - 1M
1 - 1M
1 - 1M
350V
700V
10 - 1M
10 - 1M
1 - 1M
1 - 1M
250V
500V
+70°C
-55°C
to
+150°C
44.9 - 562k
4.7 - 1M
1 - 1M
1 - 1M
200V
400V
Resistance Range (Ω)
D±0.5%
F±1%
E-96
E-24,E-96
G±2%
E-24
J±5%
E-24
Absolute
Maximum
Working
Voltage
Absolute
Maximum
Overload
Voltage
Rated
Operating
Ambient
Temperature
Temperature
Range
100K - 22M 100K - 33M 100K - 33M
environmental applications
Derating Curve
100
80
% Rated Power
60
LFF, RK26
40
20
0
-60 -40 -20
-55
LF
0
80 100 120 140 160
70
150 155
Ambient Temperature
(°C)
40
60
20
Performance Characteristics
Parameter
Short Time Overload
Effects of Solder
Moisture Resistance
Load Life
Temperature Cycling
Vibration
±(0.5% + 0.05Ω)
±(1.0% + 0.05Ω)
±(0.5% + 0.05Ω)
±(0.2% + 0.05Ω)
Requirement
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
1/03/05
84
KOA Speer Electronics, Inc.
• Bolivar Drive • P Box 547 • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
.O.
