Chip Resistor
Arrays
WNCR Series
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
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.
© TT electronics plc
09. 11
· Reduced placement cost
· Compact size
· Zero ohms also available
· Design flexibility
Chip Resistor
Arrays
WNCR Series
•Reduced placement cost
•Compact size
•Zero ohms also available
•Design flexibility
Dimensions (mm)
Type LWabcdpt
WNCR 164 3.20 1.60 0.50 0.5 0.35 0.40 0.8 0.45
Concave ±0.15 ±0.15 ±0.15 ±0.15 ±0.15 ±0.10
Terminations
Type LWabcdpt
WNCR 168 3.20 1.60 0.60 0.40 0.25 0.30 0.8 0.50
Convex ±0.10 ±0.10 ±0.15 ±0.15 ±0.15 ±0.20 ±0.10
Terminations
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.
© 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
WNCR
Power rating per resistor at 70°C watts 0.063
Resistance range (E24) ohms 10 to 1M
TCR -55 to 125°C ppm/°C ±200
Resistance tolerance % ±5
Maximum overload voltage volts 100
Maximum working overload volts 50
Ambient temperature range °C -55 to +125
Electrical Data
Physical Data
Issue B · 03.02
A subsidiary of
TT electronics plc
Welwyn Components
80
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Schematic
Construction
Substrate Alumina
Resistor Ruthenium Oxide
Terminations Nickel & solder plated
Solderability
At least 95% of the terminal area shall be covered by
continuous smooth new solder.
Marking
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.
Chip Resistor
Arrays
WNCR Series
© 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
81
Issue B · 03.02
Welwyn Components
Performance Data
Typical Performance
Short term overload ∆5.2%R
Resistance to solder heat ∆0.2%R
Temperature cycling ∆0.2%R
Moisture load life: 1000 hrs at 40°C ∆0.3%R
Load life: 1000 hrs at 70°C ∆0.3%R
Low temperature exposure: 1000 hrs at -55°C ∆0.3%R
High temperature exposure: 1000 hrs at 125°C ∆0.3%R
Humidity exposure: 1000 hrs at 40°C ∆0.3%R
Power Rating
For ambient temperature above 70°C, the power shall be derated as follows:
Ambient Temperature (oC)
Percent of
Rated Wattage
(%)
1/16 watt / resistor at 70oC
tA
B
2.0±0.05
2.0±0.05
1.75±0.1
2.75
4.0±0.1
4.0±0.1Ø1.5 +0.1
- 0
3.5±0.05
8.0±0.3
Packaging
Taping Characteristics (mm)
Packaging
Resistor arrays are supplied tape and reel.
Quantity 5,000 pcs per reel.
A t B
WNCR 2.0 +0.1 0.8 3.75 +0.1
-0.15 ±0.2 -0.15
Ordering Procedure
Example: WNCR with concave terminations at
4.7 kilohms and 5% tolerance on a reel of 5000 pieces
W N C R 1 6 4 – 4 K 7 J I
Type
Terminations
164
Concave
168
Convex
Value (use IEC62 code)
Tolerance (use IEC62 code)
J
5%
Packing
I
Tape
5000/reel
Standard
Chip Resistor
Arrays
WNCR Series
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
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.
© TT electronics plc
09. 11
Chip Resistor
Arrays
WNCR Series
© 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
81
Issue B · 03.02
Welwyn Components
Performance Data
Typical Performance
Short term overload ∆5.2%R
Resistance to solder heat ∆0.2%R
Temperature cycling ∆0.2%R
Moisture load life: 1000 hrs at 40°C ∆0.3%R
Load life: 1000 hrs at 70°C ∆0.3%R
Low temperature exposure: 1000 hrs at -55°C ∆0.3%R
High temperature exposure: 1000 hrs at 125°C ∆0.3%R
Humidity exposure: 1000 hrs at 40°C ∆0.3%R
Power Rating
For ambient temperature above 70°C, the power shall be derated as follows:
Ambient Temperature (oC)
Percent of
Rated Wattage
(%)
1/16 watt / resistor at 70oC
tA
B
2.0±0.05
2.0±0.05
1.75±0.1
2.75
4.0±0.1
4.0±0.1Ø1.5 +0.1
- 0
3.5±0.05
8.0±0.3
Packaging
Taping Characteristics (mm)
Packaging
Resistor arrays are supplied tape and reel.
Quantity 5,000 pcs per reel.
A t B
WNCR 2.0 +0.1 0.8 3.75 +0.1
-0.15 ±0.2 -0.15
Ordering Procedure
Example: WNCR with concave terminations at
4.7 kilohms and 5% tolerance on a reel of 5000 pieces
W N C R 1 6 4 – 4 K 7 J I
Type
Terminations
164
Concave
168
Convex
Value (use IEC62 code)
Tolerance (use IEC62 code)
J
5%
Packing
I
Tape
5000/reel
Standard
Chip Resistor
Arrays
WNCR Series
© 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
81
Issue B · 03.02
Welwyn Components
Performance Data
Typical Performance
Short term overload ∆5.2%R
Resistance to solder heat ∆0.2%R
Temperature cycling ∆0.2%R
Moisture load life: 1000 hrs at 40°C ∆0.3%R
Load life: 1000 hrs at 70°C ∆0.3%R
Low temperature exposure: 1000 hrs at -55°C ∆0.3%R
High temperature exposure: 1000 hrs at 125°C ∆0.3%R
Humidity exposure: 1000 hrs at 40°C ∆0.3%R
Power Rating
For ambient temperature above 70°C, the power shall be derated as follows:
Ambient Temperature (oC)
Percent of
Rated Wattage
(%)
1/16 watt / resistor at 70oC
tA
B
2.0±0.05
2.0±0.05
1.75±0.1
2.75
4.0±0.1
4.0±0.1Ø1.5 +0.1
- 0
3.5±0.05
8.0±0.3
Packaging
Taping Characteristics (mm)
Packaging
Resistor arrays are supplied tape and reel.
Quantity 5,000 pcs per reel.
A t B
WNCR 2.0 +0.1 0.8 3.75 +0.1
-0.15 ±0.2 -0.15
Ordering Procedure
Example: WNCR with concave terminations at
4.7 kilohms and 5% tolerance on a reel of 5000 pieces
W N C R 1 6 4 – 4 K 7 J I
Type
Terminations
164
Concave
168
Convex
Value (use IEC62 code)
Tolerance (use IEC62 code)
J
5%
Packing
I
Tape
5000/reel
Standard
