Pulse Withstanding
Pulse Withstanding
Chip
Resistors
Resistors
PWC Series
PWC Series
Excellent pulse withstand performance
Excellent pulse withstand performance
Improved working voltage
Improved working voltage
Improved power rating
Improved
chip sizes (0805 to 2512)
Standard
power rating
Custom designs available
Standard chip sizes (0805 to 2512)
Anti-sulphur version available
Custom designs available
Welwyn Components
·
·
·
·
·
·
Electrical Data
Size
Power @70°C
Resistance range
Tolerance
LEV
TCR
Operating temperature
Thermal Impedance
Pad / trace area *
Values
Pulse Capability
W
Ohms
%
V
ppm/°C
°C
°C/W
mm
2
220
40
160
50
150
200
-55 to +155
145
125
80
60
70
250
55
100
40
500
0805
0.25
0.33
1206
0.5
0.75
1R0 to 10M
10R to 1M: 0.5, All values: 1, 5
400
<10R:200
≥10R:100
500
2010
1
1.5
2512
2
E96 preferred - other values to special order
See graphs – full application note available on request
*Recommended minimum pad & adjacent trace area for each termination for rated power dissipation on FR4 PCB
Physical Data
Dimensions of PWC resistors are given below in mm and weight in g
L
0805
1206
2010
2512
2.0±0.3
3.2±0.4
5.1±0.3
6.5±0.3
W
1.25±0.2
1.6±0.2
2.5±0.2
3.2±0.2
T max
0.6
0.7
0.8
0.8
A
0.3±0.15
0.4±0.2
0.6±0.3
0.6±0.3
B
0.9 min
1.7 min
3.0 min
4.4 min
C
0.3±0.1
0.4±0.15
0.6±0.25
0.6±0.25
Wt.
0.009
0.020
0.036
0.055
A
B
L
A
W
C
T
Wrap-around terminations
(3 faces)
Construction
Thick film resistor material, overglaze and organic protection
are screen printed on a 96% alumina substrate. Wrap-around
terminations have an electroplated nickel barrier and solder
coating, this ensures excellent ‘leach’ resistance properties
and solderability.
Note that anti-sulphur version parts below 100R are
produced in flip-chip format with the resistor element on
the underside.
Marking
Components are not marked. Reels are marked with type,
value, tolerance, date code and quantity.
Solvent Resistance
The body protection is resistant to all normal industrial
cleaning solvents suitable for printed circuits.
General Note
General Note
Welwyn Components reserves
to
right
changes
changes in product specification without
liability.
TT electronics reserves the right
the
make
to make
in product specification without notice or
notice or liability.
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.
© 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
A subsidiary of
TT electronics plc
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
07. 08
1.14
37
Pulse Withstanding
Pulse Withstanding
Chip Resistors
Chip Resistors
PWC Series
PWC Series
Welwyn Components
Performance Data
Size
Load at rated power: 1000 hours at 70°C
Shelf life test: 12 months at room temperature
Derating from rated power at 70°C
Overload: 6.25 x rated power for 2 seconds
Dry heat: 1000 hours at 155°C
Long term damp heat
Temperature rapid change
Resistance to solder heat
Resistance to sulphur-bearing gas (AS version only): ASTM-B-809
ΔR%
ΔR%
ΔR%
ΔR%
ΔR%
1
1
1
0.25
0.25
0.25
500
ΔR%
ΔR%
Maximum
1
0.1
Zero at 155°C
0.1
0.2
0.25
0.05
0.05
0.05
Typical
0.25
0.02
Pulse Withstanding
Voltage proof
PulseResistors
Withstanding
Volts
Chip
be added to the performance of all resistors <10 Ohms.
Note: A 0.01 Ohm addition to
Chip Resistors
Pulse
Performance Data
Pulse
Performance Data
Data
Pulse Performance
Lighting Surge
1.2/50 µS Lightning Surge
10000
10000
Pulse Performance Data
Lightning Surge
Resistors are tested in accordance with IEC 60 115-1 using both 1.2/50ms and 10/700ms pulse shapes. The limit of acceptance
Lighting Surge
is a shift in resistance of less than
with IEC
initial value.
lightning surge resistors are tested in accordance
1% from the
60 115-1 using both 1.2/50µs and 10/700µs pulse shapes. 10 pulses are applied. The
Resistors are tested in accordance with IEC 60 115-1 using both 1.2/50ms and 10/700ms pulse shapes. The limit of acceptance
limit of acceptance is
shift in resistance of less than 1% from the
from
value.
is a
a shift in resistance of less than 1%
initial
the initial value.
1.2/50 µS Lightning Surge
2512
2512
2010
1206
2010
0805
1206
0805
Peak voltage (volts)(volts)
Peak voltage
1000
1000
100
100
Lightning Surge
10
lightning surge resistors are tested in
1
10
10
accordance with IEC 60 115-1 using
1
10
both 1.2/50µs and 10/700µs pulse shapes.
10 pulses are applied. The limit of
acceptance is a shift in resistance of less
than 1% from the initial value.
10000
10000
100
100
1000
10000
100000
100000
1000000
1000000
10000000
10000000
Resistance (ohms)
1000
10000
Resistance (ohms)
10/700 µS Lightning Surge
10/700 µS Lightning Surge
2512
2512
2010
Peak Voltage (volts)(volts)
Peak Voltage
1000
1000
2010
1206
0805
1206
0805
100
100
10
1
10
1
10
100
10
100
1000
10000
100000
100000
1000000
1000000
10000000
10000000
Resistance (ohms)
1000
10000
Resistance (ohms)
General Note
Advanced Film
South Staples
TT electronics reserves the right
361 992
Division
• 4222361 992 3377 Street • Corpus Christi Texas 78411 USA
liability.
to make changes in product specification without notice or
Telephone:
7900 • Facsimile:
• Website: www.irctt.com
All information is subject to TT electronics’ own data and is
Street • Corpus
accurate at time of going to print.
considered
Christi Texas 78411 USA
Advanced Film Division
• 4222 South Staples
PWC Series Issue January 2009
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670
© TT electronics plc
822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
www.bitechnologies.com
Series Issue January 2009
www.welwyn-tt.com
www.irctt.com
PWC
07. 08
1.14
Pulse Withstanding
Chip Resistors
PWC Series
e Withstanding
p Resistors
Single Impulse
The single impulse graph is the result of 50 impulses of rectangular shape applied at one minute intervals. The limit of acceptance was a shift in
resistance of less than 1% from the initial value.
Performance Data
Single Pulse
1000
e Performance Data
pulse:
e impulse graph is
of 50 impulses of
ar shape applied at
e intervals. The
ceptance was a
istance of less
rom the initial
power applied
ct to the
s of the maximum
mpulse:
e
impulse graph
gle
impulse voltage
is
wn.
50 impulses of
lt of
Pulse Power (watts)
se Withstanding
p Resistors
100
10
Single Pulse
1000
2512
2010
1206
0805
1
0.0001
0.001
0.01
Pulse duration (seconds)
0.1
1
Pulse Power (watts)
100
ular shape applied at
ute intervals. The
Continuous Pulses
acceptance was a
100
esistance of less
Continuous Load Due to Repetitive Pulses
% from the initial
10
2512
The continuous load graph was obtained by applying repetitive rectangular pulses where the pulse period was adjusted so that the average
he power applied
2010
ject to the
power dissipated in the resistor was equal to its rated power at 70°C. Again the limit of acceptance was a shift in resistance of less than 1%
1206
10
from the
ons of the maximum
initial value
ible impulse voltage
1
2512
0805
0.0001
0.001
0.01
0.1
1
hown.
due to
us load
Pulse Power (watts)
pulses:
nuous load graph
ned by applying
rectangular pulses
pulse period was
so that the
ower dissipated
stor was equal
d power at 70°C.
limit of acceptance
uous load due to
t in resistance of
ve pulses:
1% from the initial
tinuous load graph
ained by applying
e rectangular pulses
he pulse period was
d so that the
power dissipated
sistor was equal
ed power at 70°C.
he limit of acceptance
hift in resistance of
n 1% from the initial
Pulse duration (seconds)
2010
1
Continuous Pulses
100
1206
0805
0.1
0.0001
0.001
0.01
Pulse Duration (seconds)
0.1
1
Pulse Power (watts)
10
Pulse Voltage
2512
2010
1206
0805
2512
2010
1206
0805
10000
1
Pulse Voltage (Volts)
1000
0.1
0.0001
0.001
0.01
Pulse Duration (seconds)
0.1
1
100
Pulse Voltage
10000
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
Pulse Duration (seconds)
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
10
0.0001
0.001
0.01
0.1
1
© TT electronics
www.irctt.com
2 7900 • Facsimile: 361 992 3377 • Website:
plc
Division
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
se Voltage (Volts)
1000
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
PWC Series Issue January 2009
2512
2010
1.14
1206
Pulse Withstanding
Pulse Withstanding
Chip Resistors
Chip Resistors
PWC
Series
PWC
Series
Welwyn Components
Thermal Performance Data
% of Rated Power
Temperature Derating Curve
125
100
75
50
25
0
-15
70
Ambient Temperature /°C
155
Packaging
0805 and 1206 resistors are supplied on 8mm carrier tape and 2010 and 2512 resistors are supplied on 12mm carrier tape, all on 7 inch reels as
per IEC 286-3.
Application Note
PWC resistors themselves can operate at a maximum temperature of 155°C. For soldered resistors, the joint temperature should not exceed
110°C. This condition is met when the stated power levels at 70°C and recommended pad and trace areas are used. Allowance should be made if
smaller areas of copper are used.
A full Application Note on the PWC Series is available.
Ordering Procedure
Ordering Procedure
Ordering
two valid part numbers:
This product has
Procedure
European (Welwyn) Part Number: PWC2512-2K0JI
(2512, 2 kilohms ±5%, Pb-free)
European (Welwyn) Part Number: PWC2512-2K0JI
(2512, 2 kilohms ±5%, Pb-free)
P
P
W
W
1
1
1
1
Type
2
2
Size
C
C
2
2
5
1
52 1
2
2
2
3
3
-
-
2
2
K
K
4
4
4
4
Value
Value
E24 = 3/4 characters
E24 = 3/4 characters
E96 = 3/4 characters
R = characters
E96 = 3/4ohms
KR = ohms
= kilohms
MK = kilohms
= megohms
M = megohms
0
0
J
J
5
5
I
I 6
6
6
6
Termination & Packing
This product has two valid
numbers:
This product has two valid part
part numbers:
3
3
Anti-Sulphur
Anti-Sulphur
Omit for standard
Omit for standard
AS = Anti-sulphur
AS = Anti-sulphur
5
5
Tolerance
Type Size
PWC 0805
PWC 0805
1206
2010
1206
2512
2010
2512
Tolerance Termination
Standard,
I = RoHS &
& Packing
D = ±0.5% PB = SnPb & Standard
I = RoHS & Standard,
D = ±0.5% PB = SnPb & Standard
F = ±1%
0805, 1206,
3000/reel
2010
J = ±5%
F = ±1%
0805, 1206,
3000/reel
2512
1800/reel
2010
J = ±5%
T1 =
2512 RoHS &
1800/reel
Non-Standard
T1 = RoHS &
All Non-Standard
sizes
1000/reel
All sizes
1000/reel
USA (IRC) Part Number: PWC-PWC2512LF-2001JELT
USA (IRC) Part Number: PWC-PWC2512LF-2001JELT
P
P
W
W
1
1
1
2
1
2
Family Model
Family Model
PWC
PWC
PWC
PWC
3
3
Size
Size
0805
1206
0805
2010
1206
2512
2010
2512
C
C
-
-
P
P
W
W
2
2
C
C
2
2
5
1
53 1
3
2
2
(2512, 2 kilohms ±5%, Pb-free)
(2512, 2 kilohms ±5%, Pb-free)
2
2
0
0
05 0
5
6
6
Tolerance
1
1
J
J
6
6
E
E
L
L
7
7
7
7
Packing
Packing
ELT = Plastic tape
0805, 1206,
ELT = Plastic tape
3000/reel
2010
0805, 1206,
3000/reel
2512
1800/reel
2010
2512
1800/reel
09. 09
L
F
L4 F
4
5
5
Value
T
T
4
4
Termination
Termination
Value
Tolerance
Omit for SnPb 3 digits + multiplier D = ±0.5%
LF = Pb-free
F = ±1%
R = + multiplier D = ±0.5%
Omit for SnPb 3 digitsohms for
values ohms ohms
<100 for
J = ±5%
LF = Pb-free
F = ±1%
R=
values <100 ohms
J = ±5%
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, UK
General Note
Telephone: +44 (0) 1670 822181 ·
make changes in product specification without notice or liability.
Website: www.welwyn-tt.com
TT electronics reserves the right to
Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com ·
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
1.14
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