radial metal film leaded resistors
EU
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
•
Products with lead-free terminations meet EU RoHS
requirements. EU RoHS regulation is not intended for
Pb-glass contained in electrode, resistor element and glass.
•
LFF has a flame retardant coating
(Equivalent to UL91 V-O)
dimensions and construction
L
Trimming Line
Ceramic Core
D
Type
LF1/8
h
L (max.)
.197
(5.0)
.295
(7.5)
.378
(9.6)
.285
(7.25)
Dimensions
inches
(mm)
D (max.)
P
H
.100±.008 .236±.039
(2.54±0.2) (6.0±1.0)
.098
(2.5)
.200±.008
(5.08±0.2)
.300±.012
(7.62±0.3)
.100
(2.54)
.118±.020
(3.0±0.5)
.217±.020
(5.5±0.5)
h (max.)
.200
(5.08)
t
.010
(0.25)
LF1/4
LF1/4L
Marking
t
Resistive Electrode
Film
Cap
Lead
Terminal
H
.02
(0.5)
LF1/2
LFF1/4
RK26B2E
Insulation
Coating
P
.217
(5.5)
.012
(0.3)
.200±.012 .197±.039
(5.08±0.3) (5.0±1.0)
ordering information - LF, LFF
New Part #
LF
Product
Code
LF
LFF
1/4
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
L: ±200
T
Termination
Surface Material
T: Sn
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
Resistance
Tolerance
D: ±0.5%
F: ±1%
G: ±2%
J: ±5%
For 1/4L, only bulk type is available.
ordering information - RK26
New Part #
RK26
Product
Code
RK26
B
T.C.R.
(ppm/°C)
B: ±350
2E
Power
Rating
2E: 0.25W
T
Termination
Material
T: Sn
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%
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
11/06/15
KOA Speer Electronics, Inc.
• 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
161
resistors
LF
,
LFF
,
RK26
LF
,
LFF
,
RK26
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
45.3 - 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
Operating
Rated
Temperature
Ambient
Range
Temperature
% Rated Power
resistors
100K - 22M 100K - 33M 100K - 33M
environmental applications
Derating Curve
100
80
60
LFF, RK26
40
20
0
-60 -40 -20
-55
LF
0
80 100 120 140 160
150 155
70
Ambient Temperature
(°C)
20
40
60
Performance Characteristics
Parameter
Resistance
T.C.R.
Overload (Short Time)
Resistance to Solder Heat
Rapid Change of Temperature
Moisture Resistance
Endurance @ 70°C
Requirement
∆
R ±(% + 0.05Ω)
Within specified tolerance
Within specified T.C.R.
LF, LFF: ±0.5%, RK26: ±1%
LF: ±0.25%, LFF: ±0.5%, RK26: ±1%
LF, LFF: ±0.5%
RK26: ±1%
LF: ±1%, LFF: ±2%, RK26: ±5%
LF: ±1%, LFF: ±2%, RK26: ±5%
Test Method
25°C
+25°C/+125°C
Rated voltage x 2.5 or max. overload voltage for 5 seconds, whichever is less
260°C ± 5°C, 10 seconds ± 1 second or 350°C ± 10°C, 3.5 seconds ± 0.5 second
LF: -55°C (30 minutes)/+25°C (10 minutes), +150°C (30 minutes)/+25°C
(10 minutes), 5 cycles; LFF, RK26: -55°C (30 minutes)/+25°C (10 minutes),
+155°C (30 minutes)/+25°C (10 minutes), 5 cycles
40°C ±2°C, 90-95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
70°C ±3°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
2/20/17
162
KOA Speer Electronics, Inc.
• 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
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