General Purpose Surface
General Purpose Surface
Purpose Surface
Mounted Resistors
Mounted Resistors
Resistors
Welwyn Components
Welwyn Components
WCR WCR Series
Series
WCR Series
Excellent reliability
Excellent reliability
Excellentrange of sizesohmic values
WideWide reliability and ohmic values
range of sizes and
Wide Wrap around terminations
Wraprange ofterminations
around sizes and ohmic values
·
·
·
· Wrap Inner electrode protection
Inner around terminations
electrode protection
Inner electrode protection
Electrical Data
Electrical Data
0603
0805
1206
2010
2512
1210
0402
0201
0603 0.1
0805 0.125
1206 0.25
2010 0.5
2512 1.0
1210 0.25
0402 0.063
0201 0.05
Power rating @ 70
C
watts
Resistance range
1R0 to 10M 0.5
0.1
0.125
0.25
1.0
0.05
0.25
0.063
Power rating @ 70
C
watts ohms 10R to 1M0 1R0 to 1M0
Limiting element votage
volts
Resistance range
ohms 10R to 1M0 1R0 to 1M0
150 1R0 to 10M
25
50
200
200
250
TCR*
Limiting element votage
voltsppm/C
150 100
25
50
200
1
%
100
200
250
TCR* Resistance Tolerance
ppm/C
Standard values
1 E24 or E96
Resistance Tolerance
%
-55
Ambient
C
E24 or E96 to 155
Standard values temperature range
Zero-ohm Jumper Chip
2
0.5
1
-55 to 1.5
155
Ambient temperature range Rating
amps
C
<50
Zero-ohm Chip Rating
Zero-ohm Jumper Jumper Chip Resistance milliohms
amps
1.5
2
0.5
1
Zero-ohm Jumper Chip Resistance milliohms
* Notes – TCR for low values <50 10R: -400 to +600ppm/ºC, 11R to 100R: ±200ppm/ºC
1R to
TCR for high values 3M3 to 10M: ±300ppm/º
* Notes – TCR for low values 1R to 10R: -400 to +600ppm/ºC, 11R to 100R: ±200ppm/ºC
TCR for high values 3M3 to 10M: ±300ppm/º
Physical Data
Physical Data
Dimensions (mm)
L
T
C
A
Dimensions (mm)
W
Style
0201 L 0.6 ± 0.03 W 0.3 ± 0.03 T 0.23 ± 0.03 C 0.12 ± 0.05 A 0.15 ± 0.05
Style
1.0
0.35 0.12
0.2
0.25
0.5
0402 ± 0.03 ± 0.05 ± 0.03 ± 0.03 ± 0.03 ± 0.05 ± 0.05 ± 0.1 ± 0.05 ± 0.1
0.6
0.23
0.15
0.3
0201
1.6
0.5
0.25 ± 0.2 ± 0.1
0.25 ± 0.2
0.8
0603 ± 0.05 ± 0.15 ± 0.03 ± 0.15 ± 0.05 ± 0.15 ± 0.1
1.0
0.35
0.2
0.25
0.5
0402
2.0
-0.10
0.4
0.4
0805 ± 0.15 ± 0.2 ± 0.15 0.2 -0.1± 0.5 + 0.15 0.25 ± 0.2 ± 0.2
1.6
0.5 0.15
0.25 ± 0.2 ± 0.2
0.8 1.25+
0603
3.2
-0.25 1.6 + 0.5 + 0.15 -0.10
-0.1 0.5
0.5+
12062.0 ± 0.2 +0.11.25+ 0.2 -0.10.1 -0.15 0.55 +0.150.4 ± 0.2 + 0.2-0.25 ± 0.2 0.2 -0.25
0.4
0805
0.55 +0.15 + 0.2-0.25 ± 0.25 0.2 -0.25 ± 0.2
0.5 0.5+
0.5
2.6 0.15
1210 +0.1 3.2 + 0.1 -0.20.1 -0.15± 0.55 +0.15 -0.1 0.5-0.1
3.2
-0.25 1.6 +
1206
5.0
0.60
0.60 ± 0.25
2.5 0.15
2010 + 0.1 -0.2 ± 0.15 ± 0.15 ± 0.55 +0.150.56 ± 0.15 ± 0.25 ± 0.25 ± 0.2
3.2
-0.1
0.5
0.5
2.6
1210
6.3
0.56 0.60
0.60
0.60
3.2
2512 ± 0.15 ± 0.15 ± 0.15 ± 0.15 ± 0.15 ± 0.15 ± 0.25 ± 0.25 ± 0.25 ± 0.25
5.0
0.56
0.60
2.5
2010
2512
6.3 ± 0.15
3.2 ± 0.15
0.56 ± 0.15
0.60 ± 0.25
0.60 ± 0.25
C
C
A
A
T
T
L
L
A
W
W
A
Wrap-around terminations
(3 faces)
Wrap-around terminations
(3 faces)
Figure 1
Construction
Figure 1
The chips
Construction have a high alumina substrate (96% minimum) with
a have a high alumina substrate (96% minimum) with
The chipsruthenium oxide resistance element and silver palladium,
nickel and resistance element and silver palladium,
a ruthenium oxidetin plated terminations. A glazed protection coat
is applied to terminations. A glazed protection coat
nickel and tin platedthe resistive element (See Fig.1)
is applied to the resistive element (See Fig.1)
Terminations
Solderability
The terminations meet the requirements of
Terminations
IEC 115-1, Clause 4.17.3.2.
Solderability
The terminations meet the requirements of
Strength IEC 115-1, Clause 4.17.3.2. requirements of
The terminations meet
Strength
The terminations meet requirements of
IEC 68.2.21.
IEC 68.2.21.
Tin Plating
Nickel Barrier
Tin Plating
Dipped Conductor
Nickel Barrier
Dipped Conductor
Epoxy Melamine
Protection
Glass Dielectric
Epoxy Melamine
Protection
Silver
Resistance Element
Palladium Glass Dielectric
Silver
Resistance Element
Palladium
96% min Alumina Substrate
96% min Alumina Substrate
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
GeneralAll information is subject to Welwyn’s own data and is considered accurate at time of going to print.
General Note
A subsidiary of
Welwyn Components reserves the right to make changes in product specification without notice or liability.
TT electronics reserves the right to make changes in product specification without notice or liability.
TT electronics plc
A subsidiary of
All information is subject Components Limitedis· considered accurate at time of going to print.
© Welwyn to Welwyn’s own data and Bedlington, Northumberland NE22 7AA, to
All information is subject to TT electronics’ own data and is considered accurate at time of going UKprint.
TT electronics plc
www.bitechnologies.com
Iss 07.03
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com www.irctt.com www.welwyn-tt.com
© Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK
© TT electronics plc
Iss 07.03
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
02.13
