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Temperature coefficient down to 50ppm/擄C
Electrical Data
MFR4P
Power rating at 70擄C
Resistance range
Limiting element voltage
TCR
Resistance tolerance
Standard values
Thermal impedance
Ambient temperature range
*Below 1 ohm 5% preferred
擄C/watt
擄C
watts
ohms
volts
ppm/擄C
%
0.6
0R22 to 1M
250
<1R: 300 >=1R: 50
0.5, 1, 2, 5*
E24 preferred
130
-55 to 155
Physical Data
Dimensions (mm) & Weight (g)
PCB
mounting
Type
MFR4P
L Max
6.2
D Max
2.5
f min
21.0
d nom
0.6
centres
10.2
Min.
bend
radius
0.6
Wt.nom
0.3
d
D
L
f
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.
This permits a well defined body length,
(clean lead to clean lead dimension L).
Marking
Resistors are colour coded with 6 bands. IEC 62 colours are
used.
Solvent Resistance
The body protection and marking are resistant to all normal
industrial cleaning solvents suitable for printed circuits.
Terminations
Material
Strength
Solder-coated copper wire.
The terminations meet the requirements of
IEC 68.2.21
Solderability
The terminations meet the requirements of
IEC 115-1, Clause 4.17.3.2
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn鈥檚 own data and is considered accurate at time of going to print.
A subsidiary of
TT electronics plc
Issue D 路 03.06
漏 Welwyn Components Limited
路 Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 路 Facsimile: +44 (0) 1670 829465 路 Email: info@welwyn-tt.com 路 Website: www.welwyn-tt.com
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