Leaded ResistoRs
Metal Film Resistors
Precision Type
Normal & Miniature Style [ MFP Series ]
FeatURes
Power Rating
Resistance Tolerance
T.C.R.
1/6W, 1/4W, 0.4W, 1/2W, 0.6W, 1W, 2W, 3W
±0.1%, ±0.25%, (±0.02%, ±0.05% on request)
±15ppm/°C, ±25ppm/°C, (±5ppm/°C, ±10ppm/°C on request)
deRatiNG CURVe
iNtRodUCtioN
The MFP Series Metal Film Precision Resistors
are manufactured using a vacuum sputtering
system to deposit multiple layers of mixed metal
alloys and passivative materials onto a carefully
treated high grade ceramic substrate. After a
helical groove has been cut in the resistive layer,
tinned connecting leads of electrolytic copper
are welded to the end-caps. The resistors are
coated with layers of blue color lacquer. Ultra
high precision resistors, ultra high stability, ultra
low temperature coefficient.
For resistors operated in ambient temperatures above 70°C, power rating must be derated
in accordance with the curve below.
Rated Load (%)
70
100
80
60
40
20
20
40
60
80
100 120 140 160
155 °C
Ambient Temperature (°C)
diMeNsioNs
stYLe
Normal
MFP-12
ød
H
L
øD
MFP204
MFP-25
MFP207
MFP-50
MFP100
MFP200
Miniature
MFP25S
-
MFP50S
-
MFP1WS
MFP2WS
MFP3WS
diMeNsioN
L
3.4±0.3
3.4±0.3
6.3±0.5
6.3±0.5
9.0±0.5
11.5±1.0
15.5±1.0
ød
1.9±0.2
1.9±0.2
2.4±0.2
2.4±0.2
3.3±0.3
4.5±0.5
5.0±0.5
H
28±2.0
28±2.0
28±2.0
28±2.0
26±2.0
35±2.0
33±2.0
Unit: mm
ød
0.45±0.05
0.45±0.05
0.55±0.05
0.55±0.05
0.55±0.05
0.8±0.05
0.8±0.05
Note:
eLeCtRiCaL CHaRaCteRistiCs
stYLe
Power Rating at 70°C
Maximum Working Voltage
Maximum Overload Voltage
Voltage Proof
Resistance Range
Operating Temp. Range
Temperature Coefficient
MFP-12 MFP25s MFP204 MFP-25 MFP50s MFP207 MFP-50 MFP1Ws MFP100 MFP2Ws MFP200 MFP3Ws
1/6W
150V
300V
300V
1/4W
200V
400V
0.4W
1/4W
250V
500V
500V
600V
1/2W
0.6W
1/2W
350V
700V
1W
400V
800V
700V
500V
1,000V
1,000V
2W
3W
10
Ω
- 1 M
Ω
for E192 series value
-55°C to +155°C
±15ppm/°C, ±25ppm/°C
Note: Special value is available on request
eNViRoNMeNtaL CHaRaCteRistiCs
PeRFoRMaNCe test
Short Time Overload
Voltage Proof
Temperature Coefficient
Insulation Resistance
Solderability
Solvent Resistance of Marking
Robustness of Terminations
Periodic-pulse Overload
Damp Heat Steady State
Endurance at 70°C
Temperature Cycling
Resistance to Soldering Heat
test MetHod
IEC 60115-1 4.13
IEC 60115-1 4.7
IEC 60115-1 4.8
IEC 60115-1 4.6
IEC 60115-1 4.17
IEC 60115-1 4.30
IEC 60115-1 4.16
IEC 60115-1 4.39
IEC 60115-1 4.24
IEC 60115-1 4.25
IEC 60115-1 4.19
IEC 60115-1 4.18
2.5 times RCWV for 5 Sec.
in V-block for 60 Sec., test voltage by type
-55°C to +155°C
in V-block for 60 Sec.
235±5°C for 3±0.5 Sec.
IPA for 5±0.5 Min. with ultrasonic
Direct load for 10 Sec. in the direction of the terminal leads
4 times RCWV 10,000 cycles (1 Sec. on, 25 Sec. off)
40±2°C, 90-95% RH for 56 days, loaded with 0.1 times RCWV
70±2°C at RCWV for 1,000 Hr. (1.5 Hr. on, 0.5 Hr. off)
-55°C
Room Temp.
+155°C
Room Temp. (5 cycles)
260±3°C for 10±1 Sec., immersed to a point 3±0.5mm from the body
aPPRaise
±0.25%+0.05
Ω
By type
By type
>10,000M
Ω
95% Min. coverage
No deterioration of
coatings and markings
≥2.5kg (24.5N)
±1.0%+0.05
Ω
±1.5%+0.05
Ω
±1.5%+0.05
Ω
±0.75%+0.05
Ω
±0.25%+0.05
Ω
Note: Rated Continuous Working Voltage (RCWV) =
Power Rating x Resistance Value
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