Double-Sided
Double-Sided
Chip
Resistors
Resistors
DSC Series
DSC Series
Two parallel resistance elements in a single chip
Two parallel resistance elements
Excellent pulse withstand performance
in a single chip
Laser trimmed up to 0.5% tolerance
Excellent pulse withstand performance
Enhanced working voltage
Laser trimmed up
rating
tolerance
Enhanced power
to 0.5%
Enhanced working voltage
Pb-free terminations
Enhanced power rating
Welwyn Components
·
·
·
·
·
·
Pb-free terminations
Electrical Data
0805
Power @70°C
2 second overload power @25°C
Short pulse performance
Resistance range
Tolerance
LEV
TCR
Operating temperature
Dielectric withstand voltage
Thermal Impedance
Pad & trace area for rated power*
Values
Ohms
%
Volts
ppm/°C
°C
Volts
°C/W
mm
2
1206
0.33
2.1
See graphs
2010
0.75
4.7
1R0 to 4M7
2512
1.5
9.4
Watts
Watts
0.25
1.6
1R0 to 1M0
150
10R to 1M: 0.5, All values: 1, 5
200
-55 to +155
500
210
40
160
50
80
60
50
100
400
500
<10R:200 >10R:100
_
E24 or 96 preferred - other values to special order
*
Recommended minimum pad & adjacent trace area for each termination for rated power dissipation on FR4 PCB
Physical Data
Dimensions (mm) & Weight (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
0.7
0.7
0.8
0.8
A
0.3±0.15
0.4±0.2
0.6±0.3
0.6±0.3
B min
0.9
1.7
3.0
4.4
C
0.3±0.15
0.4±0.15
0.6±0.25
0.6±0.25
Wt.
0.012
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 Pb-free solderable coating, this ensures excellent ‘leach’ resistance properties and solderability.
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
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 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
04. 08
08. 11
Double Sided
Double Sided
Chip Resistors
Chip Resistors
DSC
Series
DSC
Series
Welwyn Components
Performance Data
Maximum
Load at rated power:
Overload:
Dry heat:
1000 hours at 70°C
Typical
0.25
Zero at 155°C
0.1
0.02
0.2
0.25
0.05
0.05
∆
R%
∆
R%
∆
R%
∆
R%
∆
R%
∆
R%
∆
R%
1
1
0.1
1
1
0.25
0.25
Derating from rated power at 70°C
6.25 x rated power for 2 seconds
12 months at room temperature
Shelf life test:
1000 hours at 155°C
Long term damp heat
Temperature rapid change
Resistance to solder heat
Note: A 0.01 Ohm addition to be added to the performance of all resistors <10 Ohms.
Pulse Performance Data
Lightning Surge
Resistors are tested in
accordance with IEC 60 115-1 using
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.
10,000
1.2/50µs Lightning Surge
2512
2010
1206
0805
1,000
Peak Voltage (V)
100
10
1
10
100
1,000
Value (ohms)
10,000
100,000
1,000,000
10,000,000
10/700µs Lightning Surge
10,000
2512
2010
1,000
Peak Voltage (V)
1206
0805
100
10
10
100
1,000
Value (ohms)
10,000
100,000
1,000,000
10,000,000
General Note
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, UK
TT electronics reserves the right to make changes in product specification without notice or liability.
All information
(0) 1670
to TT electronics’ own data
1670
considered accurate at time of going
·
print.
07. 08
Telephone: +44
is subject
822181 · Facsimile: +44 (0)
and is
829465 · Email: info@welwyn-tt.com
to
Website: www.welwyn-tt.com
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
08. 11
Double Sided
Chip Resistors
Chip Resistors
DSC Series
DSC Series
Double Sided
DSC2512 - Bellcore GR1089 Lightning Surge
10,000
2/10µs
10/1000µs
Peak Voltage (V)
1,000
100
1
10
100
1,000
10,000
100,000
1,000,000
10,000,000
Value (ohms)
Single Pulse
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.
Single Pulse
1000
100
Peak Power (W)
10
2512
2010
1206
0805
0.001
1
0.0001
Pulse Duration (s)
0.01
0.1
1
Continuous Load Due
to Repetitive Pulses
The continuous load graph was
obtained by applying repetitive
rectangular pulses where the pulse
period was adjusted so that the
average 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% from the initial value.
Continuous Pulses
1000
100
Peak Power (W)
10
2512
2010
1
1206
0805
0.1
0.0001
0.001
Pulse Duration (s)
0.01
0.1
1
General Note
TT electronics reserves the right to
Limited
Bedlington, Northumberland NE22 7AA, UK
liability.
© Welwyn Components
make changes in product specification without notice or
07.08
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 ·
accurate at time of going to
Website: www.welwyn-tt.com
All information is subject to TT electronics’ own data and is considered
Email: info@welwyn-tt.com ·
print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
08. 11
Double Sided
Double Sided
Chip Resistors
Chip Resistors
DSC Series
DSC Series
Welwyn Components
Thermal Performance Data
Temperature Derating Curve
125
% of Rated Power
100
75
50
25
0
-15
70
155
Ambient Temperature/°C
80
Temperature Rise Curves
2512
2010
0805
1206
70
Temperature Rise ( °C)
60
50
40
30
20
10
0
0
Power Dissipation (W)
0.5
1
1.5
Packaging
0805 and1206 DSC series resistors are supplied on 8mm carrier tape and 7 inch reels as per IEC 286-3, quantity per reel; 3000.
2010 and 2512 DSC series resistors are supplied on 12mm carrier tape and 7 inch reels as per IEC 286-3, quantity per reel;
2010 : 3000pcs; 2512 : 1800pcs. Reels of 1000pcs are available on request.
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.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, UK
07. 08
Telephone: +44 (0) 1670
© TT electronics plc
822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
08. 11
Double Sided
Double Sided
Chip Resistors
Chip Resistors
DSC Series
DSC Series
Welwyn Components
Application Notes
DSC resistors are ideally suited for handling by automatic
methods due to their rectangular shape and the small
dimensional tolerances. Electrical connection to a ceramic
substrate or to a printed circuit board can be made by reflow
or wave soldering of wrap-around terminations.
Wrap-around terminations provide good leach properties and
ensure reliable contact. Due to the robust construction, the
DSC can be immersed in the solder bath for 30 seconds at
260°C. This enables the resistor to be mounted on one side
of a printed circuit board and wire-leaded components
applied on the other side. DSC is compatible with typical
Pb-free soldering materials and temperature profiles
DSC 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.
Ordering Procedure
Specify type reference etc as shown in this example of DSC2512 10K ohms 1%.
Type
Size
Value (use IEC62 code)
Tolerance (use IEC62 code)
D
F
J
0.5%
1%
5%
T3
T18
Tape
0805, 1206 or 201
2512
3000/reel
1800/reel
DSC
2512
-
10K
F
T18
Packing
Standard
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.
© 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 www.irctt.com www.welwyn-tt.com
07. 08
08. 11
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