MF, MFS, RK
general purpose metal film leaded resistor
applications and ratings (continued)
Minimum
Dielectric
Withstanding (ppm/°C)
Voltage
Absolute Absolute
Maximum Maximum
Working Overload
Resistance Range (Ω)
Power
Rating
@ 70°C
Operating
Temperature
Range
Part
Designation
T.C.R.
(B±0.1%) (C±0.25%) (D±0.5%) (F±1.0%) (G±2.0%) (J±5.0%)
Voltage
Voltage
E-96
E-96
E-24 E-192 E-24 E-96
E-24
E-24
MF1/4C
MF1/4D
MF1/4L
MFS1/2C
MFS1/2D
MF1/2C
MF1/2D
C: ±50
—
—
10- 2.21M
—
10 - 2.21M
1.0 - 10
—
0.25W
0.50W
0.50W
500V
500V
700V
D: ±100
L: ±200
C: ±50
—
—
—
250V
500V
0.51 - 10
—
—
10 - 1M
10 - 2.21M
10 - 2.2M
—
—
—
—
—
350V
350V
700V
700V
D: ±100
10 - 4.99M
10 - 5.11M
1.0 - 10
C: ±50
D: ±100
L: ±200
C: ±50
—
—
—
—
—
—
10 - 5.05M
—
0.51 - 10Ω
MF1/2L
MF1C
—
-55°C
to
+155°C
47.5 - 1.0M 47.5 - 2.49M
10 - 5.11M
1.0 - 6.81M
—
MF1D
1W
700V
500V
350V
500V
700V
700V
D: ±100
E: ±25
—
—
47.5 - 1.0M 47.5 - 2.49M 47.5 - 4.64M 47.5 - 5.11M
MF1E
—
—
—
—
3.09M - 25M
RK1/4D
RK1/4L
RK1/4B
D: ±100
L: ±200
B: ±350
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.25W
—
3.3M - 33M 3.3M - 33M
100k - 33M 100k - 33M
100k - 25M
5.11M - 33M
—
—
—
RK1/2D
RK1/2L
D: ±100
L: ±200
0.50W
700V
700V
1000V
6.2M - 33M 6.2M - 33M
100k - 35M
RK1/2B
B: ±350
100k - 51M 100k - 51M
100k - 100M 100k - 100M
100k - 51M
RK1BC
1W
1000V
700V
B: ±350
G: ±250
1000V
350V
1500V
700V
RK1/2G*
0.50W
—
—
1M - 12M
* Discharge path resistor
environmental applications
Performance Characteristics
Requirement ∆ R ±(% + 0.05Ω)
Parameter
Resistance
Limit
Typical
Test Method
Within specified
tolerance
—
25°C
Within specified
T.C.R.
T.C.R.
—
Room temperature, +100°C
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%
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
Overload (Short Time)
Resistance to Solder Heat
260°C ± 5°C, 10 seconds ± 1 second or
350°C ± 10°C, 3.5 seconds ± 0.5 second
Dielectric Withstanding Voltage
Insulation Resistance
No breakdown
Not less than 10,000MΩ
—
—
1 minute
100V, 1 minute
RK,MF: ±1%; RK1/2G: ±5% MF: ±0.3%; RK: ±0.5%,
RK1/2G: ±1%
Rapid Change of Temperature
Moisture Resistance
Endurance at 70°C
Resistance to Solvent
Impulse
-55°C (30 minutes), +155°C (30 minutes), 5 cycles
RK: ±5%; RK1/2G: ±10%; RK: ±2%; RK1/2G: ±5%;
MFS1/4: ±1.5%; MF1/4,
MFS1/2, MF1/2: ±1%
MFS1/4: ±1%; MF1/4,
MFS1/2, MF1/2: ±0.75%
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
RK: ±5%; RK1/2G: ±10%; RK: ±2%; RK1/2G: ±5%;
MFS1/4: ±1.5%; MF1/4,
MFS1/2, MF1/2: ±1%
MFS1/4: ±1%; MF1/4,
MFS1/2, MF1/2: ±0.75%
No abnormality in
appearance. Marking
shall be easily legible
No such abnormalities
as short-circuit, burnout,
breakdown, etc.
—
—
Discharge from 1000pF capacitor 50 pulses. Internal 2.5 seconds.
Charge voltage: 1.25kV (RK1/4), 2.5kV (RK1/2) and 6kV (RK1)
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. ]
