MF1 データシートの表示（PDF） - Welwyn Components Limited
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MF1 Datasheet PDF : 3 Pages
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Welwyn Components
Construction
The resistance element is a precisely controlled thin film of
metal alloy on a high purity ceramic core, protected by a
cement coating applied so that terminations remain
completely clear.
This permits a well defined body length, (clean lead to clean
lead dimension L).
Marking
MF Series resistors are colour coded with 5 bands for 1%
tolerance or 4 bands for other tolerances. 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
Solder-coated copper wire.
Strength
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
Flammability
The resistors will not burn or emit incandescent particles
under any condition of applied temperature or power
overload.
Performance Data
Load: 1000 hours at 70˚C
R%
Shelf life: 12 months at room temperature
R%
Derating from rated power at 70˚C
R%
Climatic
R%
Climatic category
Temperature rapid change
R%
Resistance to solder heat
R%
Maximum
5
1
zero at 155˚ C
1
40/125/56
0.5
0.5
Application Notes
1. If the resistors are to dissipate full rate power, it is
recommended that the terminations should not be
soldered closer than 4mm from the body.
Packaging
The preferred method of packaging is taped and ammo
packed, see figure 1 for critical dimensions.
Alternative packaging is available by special request.
2. Due to operating temperature limitations imposed by some Figure 1
pcb materials, derating may be necessary. An estimate of
the temperature rise to be expected can be calculated
c
using the thermal impedance figures given under Electrical
Data.
3. Lead Formed resistors can also be supplied. Standard
options of Lancet, Radial and Goalpost forming are shown
in lead Form Information section.
f1
6
b
Body location f 1 – f 2
f2
6
1.4 mm
Type
MF1/2S
MF1S
MF2S
MF3S
b
52 2
52 2
52 2
67 2
c
5 0.5
5 0.5
5 0.5
10 0.5
General Note
TT Electronics reserves the right to make changes in product specification without notice or liability.
BI Technologies IRC Welwyn
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
T©eleTpThoEnle:c+tr4o4n(i0c)s1p6lc70 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
www.ttelectronics.com/resistors
Issue C · 013.068
06.18
148
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