Resistors
Double-Sided
Double-Sided Chip Resistors
Chip 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 to 0.5% tolerance
Enhanced power rating
Enhanced working voltage
Anti-sulphur version available.
Enhanced power rating
Pb-free terminations
Welwyn Components
All Pb-free parts comply with EU Directive 2011/65/EU amended by (EU) 2015/863 (RoHS3)
Electrical Data
0603
Power @70° C
2 second overload power @25° C
Short pulse performance
Resistance range
Tolerance
LEV
TCR
Operating temperature
Dielectric withstand voltage
Thermal Impedance
Values
ohms
%
V
ppm/° C
°C
V
° C/W
302
30
210
40
75
150
0R5 to 1M0
200
_
<10R:200 >10R:100
-55 to +155
500
160
50
80
60
50
100
W
W
0.125
0.8
0805
0.25
1.6
1206
0.33
2.1
See graphs
0R5 to 4M7
10R to 1M: 0.5, All values: 1, 5
400
500
2010
0.75
4.7
2512
1.5
9.4
Pad & trace area for rated power* mm
2
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 (mg)
L
0603
0805
1206
2010
2512
1.6±0.1
3.2±0.2
5.1±0.3
6.5±0.3
W
0.8±0.1
1.6±0.2
2.5±0.2
3.2±0.2
T max
0.6
0.7
0.7
0.8
0.8
A
0.3±0.15
0.3±0.15
0.4±0.2
0.6±0.3
0.6±0.3
B min
0.6
0.9
1.7
3.0
4.4
C
0.3±0.15
0.3±0.1
0.4±0.15
0.6±0.25
0.6±0.25
Wt.
2.7
5.0
10
42
65
A
B
L
A
W
C
T
2.0±0.15 1.25±0.15
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 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
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
TT Electronics 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.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
BI Technologies IRC Welwyn
A subsidiary of
TT electronics plc
www.ttelectronics.com/resistors
04. 08
06.20
© 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
Double Sided
DSC Series
Chip Resistors
DSC Series
Double-Sided Chip Resistors
Welwyn Components
Performance Data
Performance Data
Load at rated power: 1000 hours at 70°C
Derating from rated power at 70°C
Overload: 6.25 x rated power for 2 seconds
Shelf life test: 12 months at room temperature
Dry heat: 1000 hours at 155°C
Long term damp heat
Temperature rapid change
Anti-sulphur grade (AS)
Sulphur-resistant grade (SR)
ASTM-B-809 (1000 hours, 50°C, 91-93% RH)
EIA-977 (750 hours, 105°C)
ASTM-B-809 (1000 hours, 50°C, 91-93% RH)
Modified ASTM-B-809 (1000 hours, 105°C, 85% RH)
Resistance to solder heat
ΔR%
ΔR%
ΔR%
ΔR%
ΔR%
ΔR%
ΔR%
ΔR%
ΔR%
ΔR%
ΔR%
Maximum
1
Zero at 155°C
1
0.1
1
1
0.25
0.25
0.25
0.25
1
0.25
Typical
0.25
0.1
0.02
0.2
0.25
0.05
0.05
0.05
0.05
0.25
0.05
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
2010
0805
1206
0805
0603
2512
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
2010
1,000
2512
Peak Voltage (V)
1206
1206
0805
0805
0603
100
10
10
100
1,000
Value (ohms)
10,000
100,000
1,000,000
10,000,000
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.
BI Technologies IRC Welwyn
www.ttelectronics.com/resistors
© TT Electronics plc
© 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
06.20
07. 08
Double-Sided Chip Resistors
100
Peak Voltag
1,000
DSC Series
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.
1
10
100
1,000
10,000
100,000
1,000,000
10,000,000
Value (ohms)
Single Pulse
1000
100
Peak Power (W)
2512
2010
1206
10
2512
0805
2010
0603
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
1206
2512
2010
1
1206
0805
0805
0603
0.1
0.0001
0.001
Pulse Duration (s)
0.01
0.1
1
© 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
07.08
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.
BI Technologies IRC Welwyn
www.ttelectronics.com/resistors
© TT Electronics plc
06.20
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
Welwyn Components
0603, 0805 and 1206 resistors are supplied on 8mm carrier tape and 2010 and 2512 resistors are supplied on 12mm carrier tape,
DSC Series
Temperature Rise Curves
all on 7 inch reels as per IEC 286-3.
80
Double Sided
Chip Resistors
Packaging
70
155
Ambient Temperature/°C
Temperature Rise ( °C)
Application Notes
70
60
50
2512
2010
0805
1206
DSC resistors are ideally suited for handling by automatic
40
methods due to their rectangular shape and the small
30
dimensional tolerances. Electrical connection to a ceramic
20
substrate or to a printed circuit board can be made by reflow
10
or wave soldering of wrap-around terminations.
0
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
0
0.5
1
1.5
temperature should not exceed 110°C. This condition is met
Wrap-around terminations provide good leach properties and
Power Dissipation (W)
when the stated power levels at 70°C and recommended
ensure reliable contact. Due to the robust construction, the
pad and trace areas are used. Pad and trace area is defined as
DSC can be immersed in the solder bath for 30 seconds at
the total area of the solder pad plus all copper trace within two
260°C. This enables the resistor to be mounted on one side
squares of the edge of the solder pad. Allowance should be made
if smaller areas of copper are used.
7. Ordering Procedure – Replace with below
Packaging
Ordering Procedure
are supplied on 8mm carrier tape and 7 inch reels as per IEC 286-3, quantity per reel; 3000.
0603, 0805 and1206 DSC series resistors
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
Example: DSC2512-10KFT18
of 1000pcs are available on request.
: 3000pcs; 2512 : 1800pcs. Reels
(DSC2512, 10 kilohms
±1%,
Pb-free)
D
S
1
C
2
5
2
1
2
3
-
1
0
4
K
F
5
T
1
6
8
1
Type
DSC
2
Size
0603
0805
1206
2010
2512
AS
SR
3
Sulphur Grade
1
Omit for Standard
Anti-Sulphur
Sulphur Resistant
4
Value
E24 = 3/4 characters
E96 = 3/4 characters
R = ohms
K = kilohms
M = megohms
5
Tolerance
D
F
J
±0.5%
±1%
±5%
T5
T3
T18
T1
0603
0805
1206
2010
2512
6
Termination & Packing
Standard Pb-free finish
5000/reel standard
3000/reel standard
1800/reel standard
1000/reel available
All sizes
Note 1: For new designs requiring resistance to sulphur-bearing gas, SR grade is preferred.
PB
SnPb finish
All sizes Standard quantities as for Pb-free
General Note
TT Electronics reserves the right to make changes in product specification without notice or liability.
All
Welwyn Components Limited
data and is
Northumberland NE22 7AA, UK
©
information is subject to TT Electronics’ own
Bedlington,
considered accurate at time of going to print.
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
8. Update header & footer branding
BI Technologies IRC Welwyn
www.ttelectronics.com/resistors
07. 08
© TT Electronics plc
06.20
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