W30_11 Datasheet, PDF (1/2 Pages) Welwyn Components Limited – Cement Coated Wirewound Resistors

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W30 Series
·W30 Series
Values down to 10m ohms
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Welwyn Components
Electrical Data
Power rating at 25°C
Power rating at 70°C
Resistance range
TCR (-55 to 155°C)
Resistance tolerance
Standard values
Thermal impedance
Ambient temperature range
Limiting element voltage
TCR
watts
watts
ohms
ppm/°C
%
°C/watt
°C
volts
ppm/°C
Physical Data
Maximum Dimensions (mm) and Weight (g)
Type
L max. D max. f min.
W31
13 5.6 (note 1) 22.75
Note 1: 5.8 for values ^<_0R1
d nom.
0.8
Wt.nom.
1.0
W31
3.0
2.5
0R01 to 10K
See below
<R10: 5 >=R10: 1, 2, 5
E24 series preferred
83
-55 to 155
100
0.01 ohms <1000
0.033 ohms <500
0.091 ohms <200
10 ohms <150
10K ohms <100
Notes
Other values to special order
dD
L
f
Construction
A high quality ceramic substrate is assembled with
interference fit end caps to which are welded the element
to the body, providing an effective seal which is impervious to
moisture, shock, vibration, fungus and salt spray.
Terminations
Material
Solder coated copper.
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.
Marking
W31 resistors are legend marked with type reference,
resistance value and tolerance. Values are marked in
accordance with IEC 62.
Solvent Resistance
The body and marking are resistant to all normal industrial
cleaning solvents suitable for printed circuits.
Flammability
The resistor coating will not burn under any condition of
applied temperature or component overload.
General Note
G_We_eln_we_ynra_Cl_oN_mo_pote_{nents reserves the right to make changes in product specification without notice or liability.}
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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
TT electronics plc
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© TT electronics plc
Issue D · 07.06
09. 11 99