General Purpose Surface
Mounted Resistors
Welwyn Components
WCR Series
• Excellent reliability
Wide range of sizes and ohmic values
•
Wrap around terminations
•
Inner electrode protection
•
Electrical Data
�ꢀꢁꢂꢃꢄꢅꢂꢆꢀꢇꢈꢆꢃꢆ
0402
0603
0805
1206
2010
2512
�ꢀ�ꢁ
�ꢂ�ꢀ
�ꢃ�ꢄ
�ꢅ�ꢆ
ꢁꢀ�ꢃ
ꢁꢀꢁ�
ꢀ�ꢁ�
ꢀꢆꢁꢀ
Power rating at 70˚ C
watts
0.063
0.1
0.125
0.25
0.5
1.0
�ꢀꢁꢂꢃꢄꢃꢅꢆꢇꢈꢉꢄꢅꢆꢄꢊꢋ�ꢌ
ꢁꢅꢆꢆꢍ
ꢋꢞꢋꢟ
ꢀꢐꢑꢍ4R7ꢠtꢋoꢎ2ꢄꢆMꢀꢄ2ꢠꢡ
volts 50
ꢋꢞꢋꢤꢥ
ꢋꢞꢠ
ꢋꢞꢠꢢꢟ
ꢋꢞꢢꢟ
ꢋꢞꢢꢟ
ꢋꢞꢟ
ꢠꢞꢋ
Resistance range
ohms
1R to 22M
1R to 22M
1R to 22M
1R to 10M
1R to 10M
ꢦꢎꢊꢄꢆꢀꢄꢢꢡꢢ ꢠꢎꢄꢆꢀꢄꢢꢢꢡ ꢠꢎꢄꢆꢀꢄꢢꢢꢡ ꢠꢎꢄꢆꢀꢄꢢꢢꢡ
ꢎꢂꢍꢇꢍꢆꢅꢈꢏꢂꢄꢃꢅꢈꢉꢂ
ꢠꢎꢄꢆꢀꢄꢠꢋꢡ ꢠꢎꢄꢆꢀꢄꢠꢋꢡ ꢠꢎꢄꢆꢀꢄꢠꢋꢡ
Limiting element voltage
50
150
200
200 200
ꢒꢇꢑꢇꢆꢇꢈꢉꢄꢂꢓꢂꢑꢂꢈꢆꢄꢔꢀꢆꢅꢉꢂ
ꢔꢀꢓꢆꢍ
ꢢꢟ
ꢟꢋ
ꢟꢋ
ꢠꢟꢋ
ꢢꢋꢋ
ꢢꢋꢋ
ꢢꢋꢋ
ꢢꢋꢋ
TCR
ppm/˚ C
see table below
ꢍꢂꢂꢄꢆꢅꢧꢓꢂꢄꢧꢂꢓꢀꢁ
ꢕꢌꢎ
ꢖꢖꢑꢗ�ꢌ
Resistance tolerance
%
see table below
ꢍꢂꢂꢄꢆꢅꢧꢓꢂꢄꢧꢂꢓꢀꢁ
ꢎꢂꢍꢇꢍꢆꢅꢈꢏꢂꢄꢕꢀꢓꢂꢃꢅꢈꢏꢂ
ꢘ
Standard values
E24 / E96 preferred. Other values to special order
ꢮꢆꢅꢈꢫꢅꢃꢫꢄꢔꢅꢓꢜꢂꢍ
ꢨꢢꢦꢄꢗꢄꢨꢩꢤꢄ�ꢃꢂꢪꢂꢃꢃꢂꢫꢬꢄꢚꢆꢐꢂꢃꢄꢔꢅꢓꢜꢂꢍꢄꢆꢀꢄꢍꢖꢂꢏꢇꢅꢓꢄꢀꢃꢫꢂꢃ
Ambient temperature range
˚ C
-55 to 155
ꢝꢑꢧꢇꢂꢈꢆꢄꢆꢂꢑꢖꢂꢃꢅꢆꢜꢃꢂꢄꢃꢅꢈꢉꢂ
�ꢌ
ꢝ
ꢭꢟꢟꢄꢆꢀꢄꢠꢟꢟ
Zero Ohm Jumper Chip Rating
A
1
1
1.5
2
2
ꢙꢂꢃꢀꢄꢚꢐꢑꢄꢛꢜꢑꢂꢃꢄꢌꢐꢇꢖꢄꢎꢅꢆꢇꢈꢉ
ꢋꢞꢟ
ꢠ
ꢠ
ꢣꢟꢋ
ꢠꢞꢟ
ꢢ
ꢢ
ꢢ
ꢣꢟꢋ
Zero Ohm Jumper Chip Resistance
mOhms
<50
<50
<50
<50
<50
ꢙꢂꢃꢀꢄꢚꢐꢑꢄꢛꢜꢑꢂꢃꢄꢌꢐꢇꢖꢄꢎꢂꢍꢇꢍꢆꢅꢈꢏꢂ
ꢑꢚꢐꢑꢍ
ꢣꢟꢋ
ꢣꢟꢋ
ꢣꢟꢋ
ꢣꢟꢋ
ꢣꢟꢋ
Tolerance/Resistance/TCR
ꢉꢊꢀꢁꢄꢆꢋꢂꢁꢇꢌꢇꢍꢁꢎꢅꢎꢃꢆꢋꢂꢁꢇꢌꢇꢉꢏꢍ
1
�ꢃ�ꢄꢇ
WCR 0402
�ꢀ�ꢁ
WCR 0603
WCR 0805
WCR 1206@ /4W
WCR 2010
ꢁꢀꢁ�
WCR 2512
ꢀ�ꢁ�ꢈꢉꢈꢀꢆꢁꢀ
TCR
�ꢂ�ꢀ
Ohmic TCR
�ꢅ�ꢆꢈꢉꢈꢁꢀ�ꢃ
Tolerance
Ohmic
TCR
Ohmic
TCR Ohmic
TCR
Ohmic TCR
pꢚpꢐmꢑꢇꢏꢄꢄꢄꢄꢄRꢄꢄaꢄnꢄꢄgꢄꢄeꢄꢕꢌꢎppm ꢚꢐꢑꢇꢏRꢄaꢄꢄnꢄꢄgꢄꢄeꢄꢄꢄꢄꢄꢄꢕꢌꢎppm
/˚C * (Ohms) /˚C * (Ohms) /˚C*
Ohmic
ꢊꢋꢌꢍꢎꢏꢐꢑꢍ
RanꢚgꢐeꢑꢇꢏꢄꢄꢄꢄꢄpꢄꢄpꢄꢄmꢄꢄꢄꢄꢕꢌꢎRange ꢚꢐꢑpꢇpꢏꢄmꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄRꢕaꢌnꢎge
ꢎꢅꢈꢉꢂꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢖꢖꢑ ꢎꢅꢈꢉꢂꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢖꢖꢑ
ꢚꢐꢑꢇꢏꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢕꢌꢎ
ppm
Range
(Ohms) /˚ C (Ohms) /˚C * (Ohms)
/˚C * (Ohms)
ꢎꢅꢈꢉꢂꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢖꢖꢑ
MIN MAX
ꢎꢅꢈꢉꢂꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢖꢖꢑ ꢎꢅꢈꢉꢂꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢖꢖꢑ
MIN MAX MIN MAX MIN MAX
MIN MAX
MIN MAX
ꢯꢀꢐꢑꢍꢰꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢗꢱꢌꢲ
ꢯꢀꢐꢑꢍꢰꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢗꢱꢌꢲ ꢯꢀꢐꢑꢍꢰꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢗꢱꢌꢲ
ꢯꢀꢐꢑꢍꢰꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢗꢱꢌꢲ
ꢯꢀꢐꢑꢍꢰꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢄꢗꢱꢌꢲ
ꢡꢳꢴꢄꢄꢡꢝꢵ
ꢡꢳꢴꢄꢄꢡꢝꢵ
ꢡꢳꢴꢄꢄꢡꢝꢵ
ꢡꢳꢴꢄꢄꢡꢝꢵ
ꢡꢳꢴꢄꢄꢡꢝꢵ
0.5%
100R 100K 50 100R 100K
50 100R 100K 100
ꢷꢋꢞꢟꢄꢘ
ꢠꢋꢋꢎꢄꢠꢋꢋꢶꢄꢄꢄꢄꢄꢄꢷꢠꢋꢋ
ꢠꢋꢋꢎꢄꢠꢋꢋꢶꢄꢄꢄꢄꢄꢄꢷꢠꢋꢋ
1%
10R 1MO 100 1R
ꢠꢋꢎꢄꢄꢄꢄꢠꢡꢄꢄꢄꢄꢄꢄꢄꢄꢷꢢꢟꢋ
10M 100 1R 10M 100 10R 1M
100 1R0 9R1 -100 to +600
1R
10M
300
ꢷꢠꢄꢘ
ꢠꢋꢎꢄꢄꢄꢄꢠꢡꢄꢄꢄꢄꢄꢄꢄꢄꢷꢠꢋꢋ
ꢠꢎꢄꢄꢄꢄꢄꢠꢋꢡꢄꢄꢄꢄꢄꢄꢄꢷꢠꢋꢋ
ꢠꢎꢄꢄꢄꢄꢄꢠꢋꢡꢄꢄꢄꢄꢄꢄꢄꢷꢠꢋꢋ
ꢠꢎꢄꢄꢄꢄꢄꢠꢋꢡꢄꢄꢄꢄꢄꢄꢄꢷꢢꢋꢋ
2%
10R
1M 200 1R
10M 200 1R
10M 200 10R
1M
200 10R 1M0
100 10R 1M 200
ꢷꢢꢄꢘ
ꢠꢋꢎꢄꢄꢄꢄꢠꢡꢄꢄꢄꢄꢄꢄꢄꢄꢷꢢꢟꢋ
ꢠꢋꢎꢄꢄꢄꢄꢠꢡꢄꢄꢄꢄꢄꢄꢄꢄꢷꢢꢋꢋ
ꢠꢎꢄꢄꢄꢄꢄꢠꢋꢡꢄꢄꢄꢄꢄꢄꢄꢷꢢꢋꢋ
ꢠꢋꢎꢄꢄꢄꢄꢠꢡꢄꢄꢄꢄꢄꢄꢄꢄꢷꢢꢋꢋ
ꢠꢋꢎꢄꢄꢄꢄꢠꢡꢄꢄꢄꢄꢄꢄꢄꢄꢷꢥꢋꢋ
5%
4R7 2M2 300 1R
10M 200 1R
10M 200 10R
1M
200 1M0 10M
300
1R
10M
300
ꢷꢟꢄꢘ
10%
ꢠꢋꢎꢄꢄꢄꢄꢠꢡꢄꢄꢄꢄꢄꢄꢄꢄꢷꢢꢟꢋ
ꢦꢎꢊꢄꢄꢄꢄꢢꢡꢢꢄꢄꢄꢄꢄꢄꢷꢥꢋꢋ
ꢠꢎꢄꢄꢄꢄꢄꢠꢋꢡꢄꢄꢄꢄꢄꢄꢄꢷꢢꢋꢋ
ꢠꢎꢄꢄꢄꢄꢄꢠꢋꢡꢄꢄꢄꢄꢄꢄꢄꢷꢢꢋꢋ
ꢠꢎꢄꢄꢄꢄꢄꢠꢋꢡꢄꢄꢄꢄꢄꢄꢄꢷꢟꢋꢋ
11M 22M 300 11M 22M 300
ꢷꢠꢋꢄꢘ
ꢠꢠꢡꢄꢄꢄꢢꢢꢡꢄꢄꢄꢄꢄꢄꢄꢷꢥꢋꢋ
* Notes – TCR for low values 1R to 10R: -400 to +600ppm/ºC, 11R to 100R: ±±00ppm/ºC
*Note: TCR for low values 1R to 4R3 -100 to +600 ppm/˚C.
TCR for high values 3M3 to ±±M: ±300ppm/ºC
TCR for high values 3M3 to 22M 300ppm/˚C.
ꢐꢑꢒꢎꢅꢂꢆꢀꢇꢈꢆꢃꢆ
Physical Data
ꢌꢍꢎꢏꢐꢑꢍꢒꢐꢑꢓꢔꢎꢎꢕ
ꢌ
ꢍ
ꢎ
ꢐ
�
ꢡꢘꢢꢣꢙ
ꢃ
Dimensions (mm)
ꢀꢁꢋꢃꢄꢃꢀꢁꢀꢂ
ꢇꢁꢀꢃꢄꢃꢀꢁꢀꢅ
ꢀꢁꢈꢂꢃꢄꢃꢀꢁꢀꢂ
ꢀꢁꢇꢈꢃꢄꢃꢀꢁꢀꢅ
ꢀꢁꢈꢃꢄꢃꢀꢁꢇ
ꢀꢁꢇꢅꢃꢄꢃꢀꢁꢀꢅ
ꢀꢁꢂꢃꢄꢃꢀꢁꢀꢂ
ꢀꢁꢅꢃꢄꢃꢀꢁꢀꢂ
ꢄꢅꢄꢆ
Style
L
W
T
C
A
ꢀꢁꢂꢅꢃꢄꢃꢀꢁꢀꢅ
ꢀꢁꢈꢅꢃꢄꢃꢀꢁꢇ
C
ꢄꢇꢄꢅ
�
ꢇꢁꢋꢃꢄꢃꢀꢁꢇꢅ
1.0 0.05
ꢀꢁꢅꢃꢄꢃꢀꢁꢇꢅ
ꢀꢁꢈꢅꢃꢄꢃꢀꢁꢈ
ꢀꢁꢈꢅꢃꢄꢃꢀꢁꢈ
ꢀꢁꢆꢃꢄꢃꢀꢁꢇꢅ
0.5 0.03
ꢄꢈꢄꢉ
0402
0.35 0.05
0.20 0.1
0.25 0.1
ꢁ
T
ꢈꢁꢀꢃꢄꢃꢀꢁꢈ
ꢀꢁꢅꢃꢉꢃꢀꢁꢇꢅꢃꢊꢀꢁꢇꢀ
ꢀꢁꢏꢃꢄꢃꢀꢁꢈ
ꢀꢁꢏꢃꢄꢃꢀꢁꢈ
ꢇꢁꢈꢅꢉꢃꢀꢁꢈꢃꢊꢀꢁꢇ
ꢄꢊꢄꢋ
0603
1.6 0.15
0.8 0.15
0.5 + 0.15 -0.05
0.25 0.2
0.25 0.2
ꢂꢁꢈꢃꢉꢀꢁꢇꢃꢊꢀꢁꢈꢅ
ꢀꢁꢅꢅꢃꢉꢀꢁꢇꢅꢃꢊꢀꢁꢇ ꢀꢁꢅꢃꢉꢃꢀꢁꢈꢊꢀꢁꢈꢅ ꢀꢁꢅꢉꢃꢀꢁꢈꢃꢊꢀꢁꢈꢅ
ꢂ
ꢇꢁꢋꢃꢉꢃꢀꢁꢇꢃꢊꢀꢁꢇꢅ
ꢆꢅꢄꢈ
A
ꢀ
ꢁ
0805
2.0 + 0.2
1.25 + 0.2 -0.1 0.5 + 0.15 -0.10
0.4 0.2
0.4 0.2
ꢂꢁꢈꢃꢉꢃꢀꢁꢇꢃꢊꢀꢁꢈ
ꢀꢁꢅꢅꢃꢉꢀꢁꢇꢅꢃꢊꢀꢁꢇ
ꢀꢁꢅꢋꢃꢄꢃꢀꢁꢇꢅ
ꢀꢁꢅꢃꢄꢃꢀꢁꢈꢅ
ꢀꢁꢅꢃꢄꢃꢀꢁꢈ
ꢈꢁꢋꢃꢄꢃꢀꢁꢇꢅ
ꢆꢅꢆꢄ
L
�ꢑꢒꢓꢊꢒꢑꢔꢕꢖꢗꢃꢘꢙꢑꢚꢛꢖꢒꢘꢛꢔꢖꢜ
W
1206 3.2 + 0.1 -0.15 1.6 + 0.1 -0.15 0.55 + 0.15 -0.05 0.5 + 0.2 -0.25 0.5 + 0.2 -0.25
A
ꢅꢁꢀꢃꢄꢃꢀꢁꢇꢅ
ꢀꢁꢋꢀꢃꢄꢃꢀꢁꢈꢅ
ꢀꢁꢋꢀꢃꢄꢃꢀꢁꢈꢅ
ꢈꢁꢅꢃꢄꢃꢀꢁꢇꢅ
ꢅꢄꢆꢄ
ꢝꢂꢃꢞꢒꢟꢙꢜꢠ
ꢋꢁꢂꢃꢄꢃꢀꢁꢇꢅ
ꢀꢁꢅꢋꢃꢄꢃꢀꢁꢇꢅ
ꢀꢁꢋꢀꢃꢄꢃꢀꢁꢈꢅ
ꢀꢁꢋꢀꢃꢄꢃꢀꢁꢈꢅ
ꢂꢁꢈꢃꢄꢃꢀꢁꢇꢅ
2.5 0.15
ꢅꢋꢆꢅ
2010
5.0 0.15
0.56 0.15
0.60 0.25
0.60 0.25
Wrap-around terminations
(3 faces)
2512
6.3 0.15
3.2 0.15
0.56 0.15
0.60 0.25
0.60 0.25
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
A subsidiary of
TT electronics plc
© Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
•
Issue D · 07.03
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