MFR4 WELWYN [Welwyn Components Limited], MFR4 Datasheet - Page 3
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MFR4
Manufacturer Part Number
MFR4
Description
Metal Film Resistors
Manufacturer
WELWYN [Welwyn Components Limited]
Datasheet
1.MFR4.pdf
(4 pages)
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Metal Film Resistors
MFR Series
Packaging
All MFR resistors are supplied tape packed ready for loading
on to automatic sequencing and insertion machines.
Component wires will not protrude beyond the outside edge
of the tapes.
Alternative packaging available by request.
Lead Formed resistors can also be supplied. Standard options
of Lancet, Radial and Goalpost forming are available.
© Welwyn Components Limited
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Performance Data - Type MFR 5
6
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
D
Short term overload
Climatic
C
Long term damp heat
Temperature rapid change
Resistance to solder heat
Vibration and bump
Noise. (in a decade of frequency)
Insulation resistance
V
P
l u
l o
r e
i l
m
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a t
t a
a
g
n i
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a
g
f
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1
a c
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d
f
1
n i l
e t
f o
– f
g
g
o
2
y r
≤ 1.4 mm
52
f
2
Bedlington, Northumberland NE22 7AA, UK
6
5
ohms
µV/V
o v
R
R %
R %
R %
R %
R %
R %
R %
R %
%
s t l
CECC 40101-019
Requirements
e z
Not Specified
Not specified
5
o r
7
5
0
1 /
>1G
t a
0.5
0.5
0.5
0.5
0
2
2
2
2
m
1
5
5
5 /
n i
° 5
6
C
Graph 3 – Load for 1000 hours at 70°C: maximum changes
Construction
The resistance element is a precisely controlled thin film of
metal alloy sputtered on to a high purity ceramic core,
protected by a moisture-resistant, high dielectric strength
coating applied so that terminations remain completely clear.
Terminations
Material
Strength
Solderability The terminations meet the requirements of
Marking
0.5% and 1% tolerance resistors are colour coded with 5
bands, 2% tolerance has 4. IEC 62 colours are used.
Solvent Resistance
The body protection and marking are resistant to all normal
industrial cleaning solvents suitable for printed circuits.
CECC 40101-803
Requirements
e z
Not Specified
Not Specified
5
o r
5
5
0
1 /
0.25
0.25
0.25
0.25
>1G
t a
D
0
1
1
2
1
a
m
1
5
a t
5
5 /
n i
° 5
a
6
a v
C
a l i
Hot tin dipped copper wire
The terminations meet the requirements of
IEC 68.2.21
IEC 115-1, Clause 4.17.3.2
b
e l
u
p
o
n
Maximum
e r
7
q
0
Welwyn Components
0.25
0.25
0.25
>1G
u
0
0.5
0.1
0.5
0.5
0.1
0.1
0
e
9 .
m
t s
Actual Performance
n i
S
See Graph 3
e e
7
Typical
0
0.07
0.01
0.04
0.07
0.01
0.07
>1G
G
0.2
0.3
0
Issue D · 05.07
a r
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p
n i
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