LEADED RESISTORS
Metal Film Resistors Professional Type
Miniature Style [ MF0 Series ]
FEATURES
Power Rating 0.4W, 0.6W
Resistance Tolerance ±1%
T.C.R. ±50ppm/ºC
Unit : mm
INTRODUCTION
The MF0 Series Metal Film Professional Resistors
are manufactured using vacuum sputtering system
to deposit multiple layers of mixed metals alloy 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.
ød
HLøD
DERATING CURVE
For resistors operated in ambient temperatures above 70ºC, power rating must be derated in
accordance with the curve below.
Rated Load (%)
Ambient Temperature (˚C)
20 40 60 80 100 120 140 160 180
70ºC
100
80
60
40
20
DIMENSIONS
STYLE DIMENSION
Miniature L øD H ød
MF0204 3.4±0.3 1.9±0.2 28±2.0 0.45±0.05
MF0207 6.3±0.5 2.4±0.2 28±2.0 0.55±0.05
Note :
9
ELECTRICAL CHARACTERISTICS
STYLE MF0204 MF0207
Power Rating at 70 ºC 0.4W 0.6W
Maximum Working Voltage 250V 350V
Maximum Overload Voltage 500V 700V
Dielectric Withstanding Voltage 300V 500V
Resistance Range 1Ω ~ 10MΩ & 0Ω for E24 & E96 series value
Operating Temp. Range - 55ºC to + 155ºC
Temperature Coefficient ±50ppm/ºC
* Below or over this resistance range on request.
ENVIRONMENTAL CHARACTERISTICS
PERFORMANCE TEST TEST METHOD APPRAISE
Short Time Overload JIS-C-5202 5.5 2.5 Times RCWV for 5 Seconds ±(0.25%+0.05Ω)
Dielectric Withstanding Voltage JIS-C-5202 5.7 in V-Block for 60 Seconds by Type
Temperature Coefficient JIS-C-5202 5.2 -55ºC to +155ºC by Type
Insulation Resistance JIS-C-5202 5.6 in V-Block >10000MΩ
Solderability JIS-C-5202 6.5 260ºC ±5ºC for 5 ±0.5 Seconds 95% Min. Coverage
No deterioration of
Coatings and Markings
Terminal Strength JIS-C-5202 6.1 Direct load for 10 Sec. In the Direction of the Terminal Leads ≧2.5kg (24.5N)
Pulse Overload JIS-C-5202 5.8 4 Times RCWV 10000 Cycles (1 Sec. On, 25 Sec. off) ±1.0%+0.05Ω
Load Life in Humidity JIS-C-5202 7.9 40±2ºC , 90~95% RH at RCWV for 1,000 Hrs. (1.5 Hrs. on , 0.5 Hrs. off) ±1.5%+0.05Ω
Load Life JIS-C-5202 7.10 70ºC at RCWV for 1,000 Hrs. (1.5 Hrs. on 0.5 Hrs. off) ±1.5%+0.05Ω
Temperature Cycling JIS-C-5202 7.4 -55ºCgRoom Temp.g+155ºCgRoom Temp. for 5 Cycles ±0.75%+0.05Ω
Resistance to Soldering Heat JIS-C-5202 6.4 350ºC ±10ºC for 3±0.5 Seconds ±0.25%+0.05Ω
* Rated Continuous Working Voltage (RCW V)= Power Rating x Resistance Value
Resistance to Solvent JIS-C-5202 6.9 IPA for 1 Min. with Ultrasonic
