MFR Datasheet, PDF (2/4 Pages) List of Unclassifed Manufacturers – Metal Film Resistors Normal & Miniature Style

Metal Film Resistors
MFR Series
Welwyn Components
Performance Data - Type MFR 3
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
CECC 40101-019
Actual Performance
Requirements
Maximum
Typical
0.8
See Graph 1
2
0.5
See Graph 1
Not Specified
0.1
0.07
zero at 155°C
0.5
0.25
0.03
2
0.5
0.2
55/125/56
2
0.5
0.3
0.5
0.25
0.05
0.5
0.25
0.02
0.5
0.1
0.01
Not specified
0.1
0.07
>1G
>1G
>1G
350 min
400 min
400 min
Data available upon request
Graph 1 – Load for 1000 hours at 70°C: maximum changes
Performance Data - Type MFR 4
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 %
CECC 40101-019
Requirements
∆R %
2
∆R %
∆R %
∆R %
∆R %
∆R %
∆R %
∆R %
µV/V
ohms
volts
Not specified
zero at 155°C
0.5
2
55/125/56
2
0.5
0.5
0.5
Not Specified
>1G
500 min
CECC 40101-803
Requirements
Actual Performance
Maximum
Typical
0.8
See Graph 2
1
0.5
See Graph 2
Not Specified
0.1
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
0.07
0.01
0.2
0.3
0.04
0.07
0.01
0.1
>1G
500 min
Graph 2 – Load for 1000 hours at 70°C: maximum changes
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Telephone: [phone] · Facsimile: [phone] · Email: [e-mail] · Website: www.welwyn-tt.com
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Issue D · 05.07