WELWYN WNCR

Chip Resistor
Arrays
Welwyn Components
WNCR Series
•
•
•
•
Reduced placement cost
Compact size
Zero ohms also available
Design flexibility
Electrical Data
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
Resistance tolerance
±200
%
±5
Maximum overload voltage
volts
100
Maximum working overload
volts
Ambient temperature range
°C
50
-55 to +125
Physical Data
Dimensions (mm)
Type
W
a
b
c
d
p
t
3.20
1.60
0.50
0.5
0.35
0.40
0.8
0.45
±0.15
±0.15
±0.15
±0.15
±0.15
L
W
a
b
c
d
p
t
3.20
1.60
0.60
0.40
0.25
0.30
0.8
0.50
±0.10
±0.10
±0.15
±0.15
±0.15
±0.20
WNCR 164
Concave
L
P
t
L
c
d
c
d
W
±0.10
a
b
Terminations
Type
WNCR 168
Convex
±0.10
p
d
c
d
c
W
a
Terminations
b
t
L
Schematic
8
Solderability
5
At least 95% of the terminal area shall be covered by
continuous smooth new solder.
Marking
1
4
Construction
Substrate
Resistor
Terminations
Alumina
Ruthenium Oxide
Nickel & solder plated
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.
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: [email protected] · Website: www.welwyn-tt.com
80
Issue B · 03.02
Chip Resistor
Arrays
Welwyn Components
WNCR Series
Performance Data
Typical Performance
Short term overload
∆R%
2.5
Resistance to solder heat
∆R%
2.0
Temperature cycling
∆R%
2.0
Moisture load life: 1000 hrs at 40°C
∆R%
3.0
Load life: 1000 hrs at 70°C
∆R%
3.0
Low temperature exposure: 1000 hrs at -55°C
∆R%
3.0
High temperature exposure: 1000 hrs at 125°C
∆R%
3.0
Humidity exposure: 1000 hrs at 40°C
∆R%
3.0
Power Rating
For ambient temperature above 70°C, the power shall be derated as follows:
Percent of
Rated Wattage
(%)
Ambient Temperature (oC)
1/16 watt / resistor at 70oC
Packaging
Taping Characteristics (mm)
Ø1.5 +0.1
-0
4.0±0.1
2.0±0.05
8.0±0.3
1.75±0.1
3.5±0.05
B
2.75
A
4.0±0.1
WNCR
t
2.0±0.05
A
t
B
2.0 +0.1
0.8
3.75 +0.1
-0.15
±0.2
-0.15
Packaging
Resistor arrays are supplied tape and reel.
Quantity 5,000 pcs per reel.
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: [email protected] · Website: www.welwyn-tt.com
Issue B · 03.02
81