MFR Datasheet, PDF (1/4 Pages) List of Unclassifed Manufacturers – Metal Film Resistors Normal & Miniature Style

Metal Film Resistors
MFR Series
• ^{Professional grade approved to}
BSCECC 40101-803 and 019
• Tolerances down to 0.5%
• ^{Temperature coefficient down to 50ppm/°C}
Welwyn Components
Electrical Data
Power rating at 70°C
Resistance range
Limiting element voltage
TCR
Resistance tolerance
watts
ohms
volts
ppm/°C
%
MFR3
0.4
10R - 1M
200
50
1
MFR4
0.5
1R0 - 10M
350
50
0.5, 1,2
* Note:- Tighter TCR’S are available on professional grade, consult factory for details.
MFR5
0.75
1R0 - 1M
350
≤10:150 >10:100*
0.5, 1,2
Approved CECC 40101 - 019 Style
Power rating at 70°C
watts
Resistance range.
ohms
Limiting element voltage
volts
TCR
ppm/°C
Resistance tolerance
%
FZ
0.25
1 to 1M
250
100
5.1 to 9.1 : 200
1,2
FX
0.25
1 to 1M
250
250
5.1 to 9.1 : 500
1,2
EZ
0.5
10 to 1M0
350
100
1,2
EX
0.5
10 to 1M
350
250
1,2
Approved CECC 40101 - 803 Style
Power rating at 70°C
watts
Resistance range.
ohms
Limiting element voltage
volts
TCR
ppm/°C
Resistance tolerance
%
BC
0.125
10 to 1M
200
50
0.5, 1, 2
BK
0.125
10 to 1M
200
100
0.5, 1, 2
CC
0.25
10 to 1M
250
50
0.5, 1, 2
CK
0.25
10 to 1M
250
100
0.5, 1, 2
Standard values
Thermal impedance
Ambient temperature range
Product grades available
°C/watt
°C
150
commercial
E24, E96 preferred
140
112
-55 to 155
commercial, professional
Physical Data
Dimensions (mm) & Weight (g)
Type
L max
D max
PCB Min
F min d nom mount bend
centres radius
Wt.
nom
Professional
3.5
1.8 22.4 0.5 7.6 0.5 0.1
MFR3
Commercial
3.7
2.0 22.4 0.45 7.6 0.5 0.1
MFR4 ^Professional
6.2
2.5 21.0 0.6 10.2 0.6 0.3
dD
L
f
Commercial
6.8
3.0 21.0 0.55 10.2 0.6 0.3
MFR5 ^Professional
9.0
3.6 19.6 0.8 12.7 1.2 0.5
Commercial
10.0 3.7 19.6 0.6 12.7 0.6 0.5
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
© Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK
Telephone: [phone] · Facsimile: [phone] · Email: [e-mail] · Website: www.welwyn-tt.com
A subsidiary of
TT electronics plc
Issue D · 05.07
135