General Purpose Surface
Mounted Resistors
WCR Series
Table 1
Marking
Resistance
value ohms
Noise
dB
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
100R
-10
0
>100R, 10K
>10K, 100K
>100K, 1M0
>1M0
and 0402
have no marking.
+15
+20
+30
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.
Performance Data
Maximum Change
0201
0402
0603
0805
1206
1210
2010
2512
R%
R%
Load: 1000 hrs at 70°C
10R-100K : 1
>100K : 2
4R7-100K : 1 1R-100K : 1 1R-100K : 1 1R-100K : 1 1R-100K : 1 1R-100K : 1 3% + 0.1R
>100K : 2
>100K : 2
>100K : 2
>100K : 2
>100K : 2
>100K : 2
Shelf life: 12 months at room temp.
Derate linearly to zero from 70°C
Short term overload (6.25 x rated power)
Max voltage
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
zero @ 125 °C
R%
volts
R%
2
50
3
2
100
3
2.5
100
3
2.5
200
3
2.5
400
3
2.5
400
3
2.5
400
3
5
400
3
Climatic
Climatic Catagory
55/125/56
1
Long term damp heat
Temperature rapid change
Resistance to solder heat
Vibration and bump
Noise
R%
R%
R%
R%
1
2.5
1
1
2.5
1
1
2.5
1
1
2.5
1
1
2.5
1
1
2.5
1
1
2.5
1
1
2.5
1
see table 1
> 1G
Insulation resistance
Voltage proof
ohms
volts
100
500
500
500
500
500
300
Packaging
Packaging
All chips are tape mounted and supplied on standard 8mm
Chip Resistor Labstock For Designers
All chips are tape mounted and supplied on standard 8mm
tape reel, as IEC publication 286-3.
Chip Resistor Labstock For Designers
WCR chip resistors are available in a special package of the most
tape reel, as IEC publication 286-3.
WCR chip resistors are available in a special package of the most
180mm (7 inch) reel is standard
popular sizes containing 50 each of the E24 values.
180mm (7 inch) reel is standard carries 5,000 pieces.
popular sizes containing 50 each of the E24 values.
250mm (10 inch) reel carrying double the standard quantity
Please contact the sales desk for full details of this excellent
(Except 0402 carries
10,000 pieces)
Please contact the sales desk for full details of this excellent
can be supplied by agreement.
solution for designers and your prototype build requirements.
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
07.13
© TT electronics plc
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