General Purpose Surface
Resistors
Mounted Resistors
General Purpose Surface
Mounted Resistors
General Purpose Surface
WCR Series
Mounted Resistors
Excellent reliability
WCR Series
Excellent reliability
WCR Series
Wrap around terminations
Wide range of sizes and ohmic values
Inner electrode protection
Excellent reliability
Wrap
range of sizes and ohmic values
Wide
around terminations
Inner electrode protection
Wrap around terminations
Inner electrode protection
AEC-Q200 grade available
Wide range of sizes and ohmic values
Welwyn Components
Welwyn Components
Electrical Data
Electrical
rating @ 70°C
Data
Power
0201
All parts are Pb-free and comply with EU Directive 2011/65/EU (RoHS2)
0402
0603
0805
1206
1210
2010
2512
0.1
0.125
0.25
0.5
1.0
0.05
0.25
0.063
watts
Resistance range
ohms 10R to 1M0 1R0 to 1M0
1R0 to 10M
0603
0805
1206
2010
2512
1210
0402
0201
150
25
50
75
Limiting element votage
volts
200
0.1
0.125
0.25
0.5
1.0
0.05
0.063
Power ratingTCR*
@ 70°C
watts
100 0.25
200
250
ppm/°C
Resistance range
ohms 10R to 1M0 1R0 to 1M0
1R0 to 10M
1
Resistance Tolerance
%
150
25
50
75
Limiting element votage
volts
200
E24 or E96
Standard values
100
200
250
TCR*
ppm/°C
-55 to 155
Ambient temperature range
°C
1
Resistance Tolerance Jumper Chip Rating %
Zero-ohm
amps
1.5
2
0.5
1
E24 or E96
Standard values
<50
Zero-ohm Jumper Chip Resistance milliohms
-55 to 155
Ambient temperature range
°C
* Notes – TCR for low values 1R to 10R: -400 to +600ppm/ºC, 11R to 100R: ±200ppm/ºC
Zero-ohm Jumper Chip Rating
amps
1.5
2
0.5
1
TCR for high values 3M3 to 10M: ±300ppm/º
<50
Zero-ohm Jumper Chip Resistance milliohms
Physical Data
Dimensions (mm)
Physical Data
L
Style
* 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
The chips have a high alumina substrate (96% minimum) with
a ruthenium oxide resistance element and silver palladium,
Figure
Construction
and tin plated terminations. A glazed protection coat
1
nickel
The chips have a high alumina substrate (96% minimum) with
is applied to the resistive element (See Fig.1)
a ruthenium oxide resistance element and silver palladium,
Terminations
nickel and tin plated terminations. A glazed protection coat
Solderability
The terminations meet the requirements of
is applied to the resistive element (See Fig.1)
IEC 115-1, Clause 4.17.3.2.
Terminations
Strength
The terminations meet requirements of
Solderability
The terminations meet the requirements of
IEC 68.2.21.
IEC 115-1, Clause 4.17.3.2.
Strength
The terminations meet requirements of
IEC 68.2.21.
General Note
T
C
A
W
0.6 ± 0.03
0.23 ± 0.03
0.12 ± 0.05
0.15 ± 0.05
0.3 ± 0.03
0201
Dimensions (mm)
1.0 ± 0.1
0.35 ± 0.05
0.2 ± 0.1
0.25 ± 0.1
0.5 ± 0.05
0402
L
T
C
1.6 ± 0.15
0.5 ± 0.15
0.25 ±A
0.2
0.25 ± 0.2
W
Style
0.8 ± 0.15
0603
C
A
0.6 ± 0.03
0.23 ± 0.03
0.12 ± 0.05
0.15 ± 0.05
2.0 ± ± 0.03 1.25+ 0.2 -0.1 0.5 + 0.15 -0.10
0.4 ± 0.2
0.4 ± 0.2
0.3 0.2
0201
0805
1.0 ± 0.1
0.35 -0.15
0.2 ± -0.1
0.25 ± 0.1
L
3.2 +0.1±-0.25 1.6 + 0.1 ± 0.05 0.55 +0.150.1 0.5 + 0.2-0.25 0.5+ 0.2 -0.25
0.5 0.05
0402
1206
W
A T
1.6 ± 0.15 3.2 0.8 ± 0.15
0.50.15
± 0.15 0.550.25 ± 0.2
0.25 ± 0.2
+ 0.1 -0.2
+0.15 -0.1
0.5 ± 0.25
0.5 ± 0.2
0603
2.6 ±
1210
A
Wrap-around terminations
2.0 ± 0.2
0.4 0.15
0.4 ± 0.2
5.0 ± 0.15 -0.1 0.5 + 0.15 -0.10 0.56 ± ± 0.2
0.60 ± 0.25
0.60 ± 0.25
1.25+ 0.2
0805
2.5 ± 0.15
2010
(3 faces)
L
3.2 +0.1 -0.25 1.6 + 0.1 -0.15 0.55 +0.15 -0.1 0.56+ 0.2-0.25 0.60 ±0.2 -0.25 1.2 ± 0.85
0.5 ± 0.15
0.5+ 0.25
6.3 ± 0.15
1206
3.2 ± 0.15
W
2512
A
3.2 + 0.1 -0.2
0.55 +0.15 -0.1
0.5 ± 0.25
0.5 ± 0.2
2.6 ± 0.15
1210
Wrap-around terminations
5.0 ± 0.15
0.56 ± 0.15
0.60 ± 0.25
0.60 ± 0.25
2.5 ± 0.15
2010
Figure 1
(3 faces)
Construction
± 0.15
6.3 ± 0.15
0.56 ± 0.15
0.60 ± 0.25
1.2 ± 0.85
3.2
2512
C
T
Tin Plating
Epoxy Melamine
Protection
Nickel Barrier
Glass Dielectric
Silver
Dipped Conductor
Resistance Element
Palladium
Epoxy Melamine
Protection
Glass Dielectric
Silver
Resistance Element
Palladium
96% min Alumina Substrate
96% min Alumina Substrate
Tin Plating
Nickel Barrier
Dipped Conductor
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.
General
Note
© Welwyn Components Limited
· Bedlington, Northumberland NE22 7AA, UK
General
Note
Welwyn Components
the right to make changes in
changes
specification
specification without notice or liability.
Telephone: +44 (0) 1670 make
product
in product
without notice or
Email:
TT Electronics reserves
reserves the right to 822181 · Facsimile: +44 (0) 1670 829465 ·
liability.
info@welwyn-tt.com · Website: www.welwyn-tt.com
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
BI Technologies IRC Welwyn
Iss 07.03
A subsidiary of
TT electronics plc
www.ttelectronics.com/resistors
Iss 07.03
11.17
A subsidiary of
TT electronics plc
© Welwyn Components Limited
· Bedlington, Northumberland NE22 7AA, UK
© TT Electronics plc
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
General Purpose Surface
General Purpose Surface
Mounted Resistors
Mounted Resistors
WCR Series
WCR Series
Marking
All resistors are individually marked with 3 digits. The rst two
digits are the signi cant gures and the third de nes 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.
Table 1
R e s i s t a n ce
v a lu e o h m s
100R
>100R, 1 0 K
>10K, 1 0 0 K
>100K, 1 M 0
>1 M 0
Welwyn Components
N o ise
dB
-1 0
0
+1 5
+2 0
+3 0
Solvent Resistance
The protective epoxy lacquer and marking are resistant to all
normal industrial cleaning uids suitable for printed circuits.
Performance Data
Maximum Change
0201
Load: 1000 hrs at 70°C
Shelf life: 12 months at room temp.
Derate linearly to zero from 70°C
Short term overload (6.25 x rated power)
Max voltage
Climatic
Climatic Catagory
Long term damp heat
Temperature rapid change
Resistance to solder heat
Vibration and bump
Noise
Insulation resistance
Voltage proof
ohms
volts
100
300
500
0402
4R7-100K : 1
>100K : 2
0.2
2
100
3
0603
1R-100K : 1
>100K : 2
0.2
2.5
100
3
0805
1R-100K : 1
>100K : 2
0.2
2.5
200
3
55/125/56
1
1
2.5
1
1
2.5
1
1
2.5
1
1
2.5
1
see table 1
> 1G
500
500
500
500
1
2.5
1
1
2.5
1
1
2.5
1
1
2.5
1
1206
1R-100K : 1
>100K : 2
0.2
2.5
400
3
1210
1R-100K : 1
>100K : 2
0.2
2.5
400
3
2010
1R-100K : 1
>100K : 2
0.2
2.5
400
3
2512
3% + 0.1R
0.2
5
400
3
R%
R%
R%
volts
10R-100K : 1
>100K : 2
0.2
2
50
3
zero @ 155 °C
R%
R%
R%
R%
R%
All chips are tape mounted and supplied on standard 8mm
All chips are tape mounted and supplied on standard 8mm
tape reel, as IEC publication 286-3.
tape reel, as IEC publication 286-3.
180mm (7 inch) reel is standard
180mm (7 inch) reel standard carries 5,000 pieces.
250mm (10inch) reel iscarrying double the standard quantity
(Except 0402 carries 10,000 pieces)
can be supplied by agreement.
Packaging
Packaging
Chip Resistor Labstock For Designers
WCR chip resistors are available in a special package of the most
popular sizes containing 50 each of the E24 values.
Please contact the sales desk for full details of this excellent
Note: For zero ohm jumper chips use the dummy value & tolerance code
General Note
© W elwyn Components Limited
Bedlington, Northumberland NE22 7AA, UK
R005J
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT Electronics’ own
+44 (0)
is considered
· Email: info@welwyn-tt.com ·
Telephone: +44 (0) 1670 822181 · Facsimile:
data and
1670 829465
accurate at time of going to print.
Website: www.welwyn-tt.com
BI Technologies IRC Welwyn
Issue D ·
01.11
07.03
www.ttelectronics.com/resistors
© TT Electronics plc
11.17
General Purpose Surface
Mounted Resistors
WCR Series
Ordering Procedure
Ordering Procedure
This product has two valid part numbers:
European (Welwyn) Part Number: WCR1206-10KFI
(1206, 10 kilohms ±1%, Pb-free)
W
C
1
1
Type
2
Size
R
1
2
2
3
Value
1
E24 = 3 characters
E96 = 4 characters
R = ohms
K = kilohms
M = megohms
0
6
-
1
0
3
4
Tolerance
1
F = ±1%
K
F
4
I
5
5
Grade / Packing
I = Standard
A = AEC-Q200 grade
2
Both grades use standard
packing as follows:
0201
0402
0603, 0805,
1206, 1210
2010, 2512
20000/reel
10000/reel
5000/reel
4000/reel
WCR 0201
0402
0603
0805
1206
1210
2010
2512
Note 1: For zero ohm jumper chips use the dummy value & tolerance code
R005J
Note 2: AEC-Q200 grade on resistor chips is available only in size 0402 and larger and from 10R to 1M0
USA (IRC) Part Number: WCR-WCR1206LF-1002FPLT
(1206, 10 kilohms ±1%, Pb-free)
W
C
1
1
WCR
2
WCR
3
Size
0201
0402
0603
0805
1206
1210
2010
2512
R
-
W
C
2
4
Termination
LF = Pb-free
R
1
2
3
5
Value
3 digits + multiplier
R = ohms for values
<100 ohms
0
6
L
4
F
1
0
5
6
Tolerance
F = ±1%
0
2
F
6
P
L
7
7
Packing
PLT = Paper Tape
0201
20000/reel
0402
10000/reel
0603, 0805,
5000/reel
1206, 1210
2010
4000/reel
ELT = Plastic Tape
2512
4000/reel
T
Family Model
Note: For zero ohm jumper chips use value & tolerance code
R000J
General Note
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
BI Technologies IRC Welwyn
www.ttelectronics.com/resistors
© TT Electronics plc
11.17
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