MF, MFS, RK
general purpose metal film leaded resistor
applications and ratings
(continued)
Minimum
Absolute Absolute
Resistance Range (Ω)
Power
Operating
Part
Dielectric
T.C.R.
Maximum Maximum
Rating
Temperature
Designation
Withstanding (ppm/°C)
(B±0.1%) (C±0.25%) (D±0.5%) (F±1.0%) (G±2.0%) (J±5.0%)
Working Overload
@ 70°C
Range
Voltage
Voltage
Voltage
E-24
E-96
E-24
E-96
E-24 E-192 E-24 E-96
MF1/4C
MF1/4D
MF1/4L
MFS1/2C
MFS1/2D
MF1/2C
MF1/2D
MF1/2L
MF1C
MF1D
MF1E
RK1/4D
RK1/4L
RK1/4B
RK1/2D
RK1/2L
RK1/2B
RK1BC
RK1/2G*
1W
0.50W
1000V
700V
0.50W
700V
0.25W
500V
1W
700V
0.50W
700V
0.50W
500V
0.25W
500V
C: ±50
D: ±100
L: ±200
C: ±50
D: ±100
C: ±50
D: ±100
L: ±200
C: ±50
D: ±100
E: ±25
D: ±100
L: ±200
B: ±350
D: ±100
L: ±200
B: ±350
B: ±350
G: ±250
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47.5 - 1.0M
resistors
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—
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47.5 - 2.49M
10 - 5.11M
1.0 - 6.81M
10- 2.21M
10 - 2.21M
1.0 - 10
10 - 2.21M
10 - 4.99M
10 - 5.05M
10 - 5.11M
—
0.51 - 10
10 - 2.2M
—
250V
500V
—
10 - 1M
—
350V
700V
—
0.51 - 10Ω
—
350V
700V
-55°C
to
+155°C
—
1.0 - 10
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—
—
—
—
—
—
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3.09M - 25M
—
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—
3.3M - 33M
100k - 33M
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—
—
3.3M - 33M
100k - 33M
350V
700V
47.5 - 1.0M 47.5 - 2.49M 47.5 - 4.64M 47.5 - 5.11M
—
100k - 25M
5.11M - 33M
500V
700V
—
6.2M - 33M
100k - 51M
—
6.2M - 33M
100k - 51M
—
100k - 35M
100k - 51M
700V
1000V
100k - 100M 100k - 100M
1000V
350V
1500V
700V
—
—
1M - 12M
* Discharge path resistor
environmental applications
Performance Characteristics
Parameter
Resistance
T.C.R.
Overload (Short Time)
Resistance to Solder Heat
Dielectric Withstanding Voltage
Insulation Resistance
Rapid Change of Temperature
Moisture Resistance
Endurance at 70°C
Resistance to Solvent
Impulse
Requirement
∆
R ±(% + 0.05Ω)
Limit
Typical
Within specified
—
tolerance
Within specified
—
T.C.R.
RK: ±1%, RK1/2G: ±2.5% RK: ±0.6%, RK1/2G: ±1%
MF: ±0.5%
MF: ±0.3%
RK: ±1%; RK1/2G: ±5%; RK: ±0.5%; RK1/2G: ±1%
MFS: ±0.75%; MF1/4,
MFS1/4: ±0.4%; MF1/4,
MFS1/2, MF1/2: ±0.5%, MFS1/2, MF1/2: ±0.25%
Test Method
25°C
Room temperature, +100°C
Rated voltage x 2.5 or max. overload voltage for 5 seconds, whichever is less;
MFS1/2: Rated voltage x 2 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
1 minute
100V, 1 minute
-55°C (30 minutes), +155°C (30 minutes), 5 cycles
40°C ± 2°C, 90 - 95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
70°C ± 2°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
The resistor shall be immersed for 5 seconds in IPA
Discharge from 1000pF capacitor 50 pulses. Internal 2.5 seconds.
Charge voltage: 1.25kV (RK1/4), 2.5kV (RK1/2) and 6kV (RK1)
No breakdown
Not less than 10,000MΩ
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RK,MF: ±1%; RK1/2G: ±5% MF: ±0.3%; RK: ±0.5%,
RK1/2G: ±1%
RK: ±5%; RK1/2G: ±10%;
MFS1/4: ±1.5%; MF1/4,
MFS1/2, MF1/2: ±1%
RK: ±5%; RK1/2G: ±10%;
MFS1/4: ±1.5%; MF1/4,
MFS1/2, MF1/2: ±1%
No abnormality in
appearance. Marking
shall be easily legible
No such abnormalities
as short-circuit, burnout,
breakdown, etc.
RK: ±2%; RK1/2G: ±5%;
MFS1/4: ±1%; MF1/4,
MFS1/2, MF1/2: ±0.75%
RK: ±2%; RK1/2G: ±5%;
MFS1/4: ±1%; MF1/4,
MFS1/2, MF1/2: ±0.75%
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Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
2/01/11
110
KOA Speer Electronics, Inc.
• 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
KOA [ KOA SPEER ELECTRONICS, INC. ]
