Chip Resistor
Chip Resistor
Arrays
Arrays
WNCR Series
WNCR Series
Reduced placement cost
•
Reduced placement cost
Compact size
Compact size
•
Zero ohms also available
•
Zero ohms also available
Design flexibility
•
Design flexibility
Welwyn Components
·
·
·
·
Electrical Data
WNCR
Power rating per resistor at 70°C
Resistance range (E24)
TCR -55 to 125°C
Resistance tolerance
Maximum overload voltage
Maximum working overload
Ambient temperature range
watts
ohms
ppm/°C
%
volts
volts
°C
0.063
10 to 1M
±200
±5
100
50
-55 to +125
Physical Data
Dimensions (mm)
Type
WNCR 164
Concave
Terminations
Type
WNCR 168
Convex
Terminations
L
3.20
±0.10
W
1.60
±0.10
a
0.60
±0.15
b
0.40
±0.15
c
0.25
±0.15
d
0.30
±0.20
p
0.8
t
0.50
±0.10
d
a
b
L
t
c
p
d
c
W
t
P
c
W
c
a
d
d
L
L
3.20
±0.15
W
1.60
±0.15
a
0.50
±0.15
b
0.5
c
0.35
±0.15
d
0.40
±0.15
p
0.8
t
0.45
±0.10
b
Schematic
8
5
Solderability
At least 95% of the terminal area shall be covered by
continuous smooth new solder.
Marking
1
4
Normal resistance value is marked on the top of the resistor
with three digits.
The first two digits are significant of the nominal value and
the third digit is the multiplier.
Construction
Substrate
Resistor
Terminations
Alumina
Ruthenium Oxide
Nickel & solder plated
General Note
Welwyn Components
the right to
right
changes in product
product specification without
liability.
TT electronics reserves
reserves the
make
to make changes in
specification without notice or
notice or liability.
All information is subject to Welwyn’s own data and is considered accurate at time of
of going to print.
All information is subject to TT electronics’ own data and is considered accurate at time
going to print.
A subsidiary of
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
TT electronics plc
Issue B · 03.02
09. 11
© Welwyn Components Limited
· Bedlington, Northumberland NE22 7AA, UK
© TT electronics plc
822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Telephone: +44 (0) 1670
80
Chip Resistor
Chip Resistor
Arrays
Chip Resistor
Chip Resistor
Arrays
WNCR
Arrays
Series
Arrays
WNCR
Series
WNCR
Series
WNCR Series
Welwyn Components
Welwyn Components
Welwyn Components
Typical Performance
∆
R%
∆
R%
∆
R%
∆
R%
∆
R%
∆
R%
∆
R%
∆
R%
∆
R%
∆
R%
∆
R%
∆
R%
∆
R%
∆
R%
∆
R%
∆
R%
∆
R%
∆
R%
2.5
Typical Performance
2.0
Typical Performance
2.5
2.0
5
2.0
3.0
2
2.0
3.0
2
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
Performance Data
Performance Data
Performance Data
Short term overload
Resistance to solder heat
Short term overload
Temperature cycling
Short term overload
Resistance to solder heat
Moisture loadsolder heathrs at 40°C
Resistance to life: 1000
Temperature cycling
Load life: 1000 hrs at 70°C
Temperature cycling
Moisture load life: 1000 hrs at 40°C
Low temperature exposure: 1000 hrs at -55°C
Moisture load life: 1000 hrs at 40°C
Load life: 1000 hrs at 70°C
High temperature exposure: 1000 hrs at 125°C
Load life: 1000 hrs at 70°C
Low temperature exposure: 1000 hrs at -55°C
Humidity exposure: 1000 hrs at 40°C
Low temperature exposure: 1000 hrs at -55°C
High temperature exposure: 1000 hrs at 125°C
High temperature exposure: 1000 hrs at 125°C
Humidity exposure: 1000 hrs at 40°C
Humidity exposure: 1000 hrs at 40°C
Power Rating
For ambient temperature above 70°C, the power shall be derated as follows:
Power Rating
Power Rating
For ambient temperature above 70°C, the power shall be derated as follows:
For ambient temperature above 70°C, the power shall be derated as follows:
Percent of
Rated Wattage
Percent of
(%)
Percent of
Rated Wattage
Rated Wattage
(%)
(%)
Ambient Temperature (
o
C)
1/16 watt / resistor at 70
o
C
Ambient Temperature (
o
C)
o
Ambient Temperature 70C)
1/16 watt / resistor at (
o
C
1/16 watt / resistor at 70
o
C
Packaging
Taping Characteristics (mm)
Packaging
Packaging
Taping Characteristics (mm)
Taping Characteristics (mm)
2 . 0
±
0 . 0 5
2 . 0
±
0 . 0 5
1 . 7 5
±
0 . 1
8 . 08 .0 .
±
0 . 3 . 0
±
0 . 3
±
03 8
2 . 0
±
0 . 0 5
4 . 0
±
0 . 1
Ø1.5 +0.1
-0
Ø1.5 +0.1
-0
Ø1.5 +0.1
-0
Ordering Procedure
E
xample: WNCR with concave terminations at
Ordering Procedure
Ordering Procedure
a reel of 5000 pieces
4.7 kilohms and 5% tolerance on
E
xample: WNCR with concave terminations at
E
xample: WNCR with concave terminations at
4 . 0
±
0 . 1
4 . 0
±
0 . 1
1 . 7 5
±
0 . 1
3 . 5
±
0 . 0 5
1 . 7 5
±
0 . 1
2.75
3 . 5
±
0 . 0 5
3 . 5
±
0 . 0 5
2.75
2.75
4 . 0
±
0 . 1
2 . 0
±
0 . 0 5
A
4 . 0
±
0 . 1
4 . 0
±
0 . 1
2 . 0
±
0 . 0 5
2 . 0
±
0 . 0 5
A
A
B
B
B
t
t
t
164 Concave
Terminations
168 Convex
Terminations
164 Concave
164 Concave
168 Convex
Value
Convex
(use IEC62 code)
168
4.7 kilohms and 5% tolerance on
R 1 6 4
of 5000 pieces
W N C
a reel
–
4 K 7 J
I
4.7 kilohms and 5% tolerance on a reel of 5000 pieces
Type
WNCR164
–
4K7J
I
WNCR164
–
4K7J
I
Type
Terminations
Type
A
WNCR
WNCR
WNCR
2.0 +0.1
A
-0.15
A
2.0 +0.1
2.0 +0.1
-0.15
-0.15
t
0.8
t
±0.2
t
0.8
0.8
±0.2
±0.2
B
3.75 +0.1
B
-0.15
B
3.75 +0.1
3.75 +0.1
-0.15
-0.15
Value (use IEC62 code)
Tolerance (use IEC62 code)
Value (use IEC62 code)
J
5%
Tolerance (use IEC62 code)
Tolerance (use IEC62 code)
J
5%
Packing
J
5%
Packing
Packing
I
Tape
I
Tape
I
Tape
5000/reel
5000/reel
5000/reel
Packaging
Standard
Standard
Standard
Resistor arrays are supplied tape and reel.
Packaging
pcs per reel.
Quantity 5,000
Packaging
are supplied tape and reel.
Resistor arrays
Resistor arrays are supplied tape and reel.
Quantity 5,000 pcs per reel.
Quantity 5,000 pcs per reel.
General Note
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, UK
TT electronics reserves the right to
Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com ·
Issue B · 03.02
Telephone: +44 (0) 1670 822181 ·
make changes in product specification without notice or liability.
Website: www.welwyn-tt.com
All
Welwyn Components Limited
own data and
Northumberland NE22 7AA, UK
going to print.
information is subject to TT electronics’
Bedlington,
is considered accurate at time of
©
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
Issue B · 03.02
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, UK
Issue B · 03.02
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
© TT electronics plc
09. 11
81
81
81
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