WCR Datasheet, PDF (2/2 Pages) Welwyn Components Limited – 50General Purpose Surface Mounted Resistors

General Purpose Surface
Mounted Resistors
WCR Series
Welwyn Components
Construction
The chips have a high alumina substrate (96% minimum) with
a ruthenium oxide resistance element and silver palladium,
nickel and tin plated terminations. A glazed protection coat
is applied to the resistive element (See Fig.1)
Terminations
Solderability The terminations meet the requirements of
IEC 115-1, Clause 4.17.3.2.
Strength
The terminations meet requirements of
Marking
IEC 68.2.21.
All resistors are individually marked with 3 digits. The first two
digits are the significant figures and the third defines the
number of added zeros. Jumpers are marked 000. Types 0201
and 0402 have no marking.
E96 1% components that can not be marked with 4 digits
will be marked with a standard 3 digit code. Details can be
supplied upon request.
Solvent Resistance
The protective epoxy lacquer and marking are resistant to all
normal industrial cleaning fluids suitable for printed circuits.
Figure 1
Tin Plating
Nickel Barrier
Dipped Conductor
Silver
Palladium
EPprotxeyctMioenlamine
Glass Dielectric
Resistance Element
96% min Alumina Substrate
Table 1
Resistance
value ohms
100R
>100R, 10K
>10K, 100K
>100K, 1M0
>1M0
Noise
dB
-10
0
+15
+20
+30
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Packaging
Packaging
All chips are tape mounted and supplied on standard 8mm
Atalpl _{echriepesl,aares} tIEaCpepmuboluicnatteiodna2n8d6s-u3p. plied on standard 8mm
t1a8p0emrmeel(,7aisnIcEhC) _rpeuebl liiscasttiaonnd2a8rd6-3.
128500mmmm ((710ininchch) _{)rereeleilscsatrarynindgarddocuabrlreietsh5e,0st0a0ndpaierdceqs.uantity}
(cEaxncebpets0u4p0p2liecdarbriyesag1r0e,e0m00enpti.eces)
250mm (10 inch) reel carrying double the standard quantity
can be supplied by agreement.
Chip Resistor Labstock For Designers
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solution for designers and your prototype build requirements.
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Telephone: [phone] · Facsimile: [phone] · Email: [e-mail] · Website: www.welwyn-tt.com
IIsssue DE ^•·0027..0073