Metal Film Resistors
MFR Series
Welwyn Components
Performance Data - Type MFR 3
CECC 40101-019
Requirements
Load at commercial rating : 1000 hours at 70°C
Load at CECC rating :
1000 hours at 70°C
Shelf life :
12 months at room temperature
Derating
Short term overload
Climatic
Climatic category
Long term damp heat
Temperature rapid change
Resistance to solder heat
Vibration and bump
Noise. (in a decade of frequency)
Insulation resistance
Voltage proof
Pulse handling
R%
R%
R%
R%
R%
R%
R%
R%
R%
µV/V
ohms
volts
2
Not Specified
zero at 155°C
0.5
2
55/125/56
2
0.5
0.5
0.5
Not specified
>1G
350 min
Actual Performance
Maximum
Typical
0.8
See Graph 1
0.5
See Graph 1
0.1
0.07
0.25
0.5
0.5
0.25
0.25
0.1
0.1
>1G
400 min
Data available upon request
0.03
0.2
0.3
0.05
0.02
0.01
0.07
>1G
400 min
Graph 1 – Load for 1000 hours at 70°C: maximum changes
Performance Data - Type MFR 4
CECC 40101-019
Requirements
Load at commercial rating :
1000 hours at 70°C
Load at CECC rating :
1000 hours at 70°C
Shelf life :
12 months at room temperature
Derating
Short term overload
Climatic
Climatic category
Long term damp heat
Temperature rapid change
Resistance to solder heat
Vibration and bump
Noise. (in a decade of frequency)
Insulation resistance
Voltage proof
Pulse handling
R%
R%
R%
R%
R%
R%
R%
R%
R%
µV/V
ohms
volts
2
Not specified
zero at 155°C
0.5
2
55/125/56
2
0.5
0.5
0.5
Not Specified
>1G
500 min
1
Not Specified
CECC 40101-803
Requirements
Actual Performance
Maximum
Typical
0.8
0.5
0.1
See Graph 2
See Graph 2
0.07
0.01
0.2
0.3
0.04
0.07
0.01
0.1
>1G
500 min
zero at 155°C
0.25
0.25
1
0.5
55/125/56
1
0.5
0.25
0.25
0.25
0.25
0.25
0.1
Not Specified
0.1
>1G
>1G
400 min
500 min
Data available upon request
Graph 2 – Load for 1000 hours at 70°C: maximum changes
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
136
Issue D · 05.07
WELWYN [ WELWYN COMPONENTS LIMITED ]
