DATA SHEET
SURGE CHIP RESISTORS
SR series
20%, 10%, 5%
sizes 0805/1206/1218/2010/2512
RoHS compliant & Halogen free
Product specification – Mar 18, 2011 V.1
Product specification
2
8
Chip Resistor Surface Mount
SR
SERIES
0805/1206/1218/2010/2512
SCOPE
This specification describes
SR0805 to SR2512 chip resistors
with lead-free terminations made by
thick film process.
APPLICATIONS
Telecommunications
Power
ORDERING INFORMATION - GLOBAL PART NUMBER
Part number is identified by the series name, size, tolerance, packaging
type, temperature coefficient, taping reel and resistance value.
GLOBAL PART NUMBER
SR XXXX X X X XX XXXX L
(1)
(2) (3) (4)
(5)
(6)
(7)
(1) SIZE
0805 / 1206 / 1218 / 2010 / 2512
supplies
FEATURES
Superior to SR series in pulse
withstanding voltage and surge
withanding voltage.
MSL
(2) TOLERANCE
J = ±5%
K = ±10%
M = ±20%
class: MSL 1
free epoxy
compliant
(3) PACKAGING TYPE
R = Paper taping reel
K = Embossed taping reel
Halogen
RoHS
-
(4) TEMPERATURE COEFFICIENT OF RESISTANCE
– = Based on spec.
Products with lead-free
terminations meet RoHS
requirements
Pb-glass contained in electrodes,
resistor element and glass are
exempted by RoHS
(5) TAPING REEL
07 = 7 inch dia. Reel
10 = 10 inch dia. Reel
13 = 13 inch dia. Reel
-
(6) RESISTANCE VALUE
1
Ω
≤
R
≤
100 KΩ
There are 2~4 digits indicated the resistance value. Letter R/K/M is decimal point, no
need to mention the last zero after R/K/M, e.g.1K2, not 1K20.
Detailed coding rules of resistance are shown in the table of “Resistance rule of
global part number”.
Reduce
High
environmentally
hazardous waste
component and equipment
reliability
(7) DEFAULT CODE
Letter L is the system default code for ordering only.
(Note)
Resistance rule of global part
number
Resistance coding
Example
rule
XRXX
(1 to 9.76
Ω)
XXRX
(10 to 97.6
Ω)
XXXR
(100 to 976
Ω)
XKXX
(1 to 9.76 KΩ)
XXKX
(10 to 97.6 KΩ)
XXXK
(100 KΩ)
1R = 1
Ω
1R5 = 1.5
Ω
9R76 = 9.76
Ω
10R = 10
Ω
97R6 = 97.6
Ω
100R = 100
Ω
1K = 1,000
Ω
9K76 = 9760
Ω
10K = 10,000
Ω
97K6= 976,000
Ω
100K = 100,000
Ω
O
RDERING EXAMPLE
The ordering code for an SR0805
chip resistor, value 10 KX with
±5% tolerance, supplied in 7-inch
tape reel is: SR0805JR-0710KL.
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Mar 18, 2011 V.1
Product specification
3
8
Chip Resistor Surface Mount
SR
SERIES
0805/1206/1218/2010/2512
MARKING
SR1218
YNSC099
E-24 series: 3 digits
First two digits for significant figure and 3rd digit for number of zeros
Fig. 1
Value=10 KΩ
SR0805 / SR1206 / SR2010 / SR2512
03
YNSC001
E-24 series: 3 digits
First two digits for significant figure and 3rd digit for number of zeros
Fig. 2
NOTE
Value=10 KΩ
For further marking information, please refer to data sheet “Chip resistors marking”.
CONSTRUCTION
The resistor is constructed on top of a high-grade
ceramic body. Internal metal electrodes are added at
each end and connected by a resistive glaze. The
resistive glaze is covered by a lead-free glass. The
composition of the glaze is adjusted to give the
approximately required resistance value. The whole
element is covered by a protective overcoat. The
top of overcoat is marked with the resistance value.
Finally, the two external terminations (Ni/matte tin)
are added, as shown in Fig.3.
OUTLINES
marking layer
overcoat
protective glass
resistive layer
inner electrode
termination (Ni/matte tin)
inner electrode
YNSC095
ceramic substrate
Fig. 3
Chip resistor outlines
DIMENSIONS
Table 1
TYPE
SR0805
SR1206
SR1218
SR2010
SR2512
L (mm)
2.00 ±0.10
3.10 ±0.10
3.10 ±0.10
5.00 ±0.10
6.35 ±0.10
W (mm)
1.25 ±0.10
1.60 ±0.10
4.60 ±0.10
2.50 ±0.15
3.10 ±0.15
SR0805/1206/2010/2512
H (mm)
0.50 ±0.10
0.55 ±0.10
0.55 ±0.10
0.55 ±0.10
0.55 ±0.10
SR1218
I
1
I
1
(mm)
0.35 ±0.20
0.45 ±0.20
0.45 ±0.20
0.55 ±0.15
0.60 ±0.20
I
2
(mm)
0.35 ±0.20
0.40 ±0.20
0.40 ±0.20
0.50 ±0.20
0.50 ±0.20
For dimension, please refer to Table 1
Side view for all type
I
1
W
H
I
2
W
Fig. 4
Chip resistor dimensions
L
L
YNSC096
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Mar 18, 2011 V.1
Product specification
4
8
Chip Resistor Surface Mount
SR
SERIES
0805/1206/1218/2010/2512
ELECTRICAL CHARACTERISTICS
Table 2
CHARACTERISTICS
TYPE
POWER
RESISTANCE RANGE
Operating
Temperature Range
Max.
Working
Voltage
150 V
150 V
E24 5%, 10%, 20%
1
Ω
≤
R
≤
100 KΩ
–55 °C to +155 °C
200 V
200 V
200 V
Max.
Overload
Voltage
300 V
400 V
400 V
400 V
400 V
Dielectric
Withstanding
Voltage
300 V
500 V
500 V
500 V
500 V
Temperature
Coefficient of
Resistance
SR0805
SR1206
SR1218
SR2010
SR2512
1/8 W
1/4 W
1W
3/4 W
1W
±200 ppm/°C
FOOTPRINT AND SOLDERING PROFILES
Recommended footprint and soldering profiles, please refer to data sheet “Chip resistors mounting”.
PACKING STYLE AND PACKAGING QUANTITY
Table 3
Packing style and packaging quantity
PACKING STYLE
Paper taping reel (R)
REEL DIMENSION
7" (178 mm)
10" (254 mm)
13" (330 mm)
SR0805
5,000
10,000
20,000
---
SR1206
5,000
10,000
20,000
---
SR1218
---
---
---
4,000
SR2010
---
---
---
4,000
SR2512
---
---
---
4,000
Embossed taping reel (K)
NOTE
7" (178 mm)
1. For paper/embossed tape and reel specification/dimensions, please refer to data sheet “Chip resistors packing”.
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Mar 18, 2011 V.1
Product specification
5
8
Chip Resistor Surface Mount
SR
SERIES
0805/1206/1218/2010/2512
FUNCTIONAL DESCRIPTION
OPERATING TEMPERATURE RANGE
handbook, halfpage
Range: –55 °C to +155 °C
POWER RATING
P
(%Prated )
100
MLB206_2
Each type rated power at 70 °C:
SR0805 = 1/8 W (0.125W)
SR1206 = 1/4 W (0.25W)
SR1218 = 1 W
SR2010 = 3/4W (0.75W)
SR2512 = 1 W
R
ATED VOLTAGE
The DC or AC (rms) continuous working voltage
corresponding to the rated power is determined by
the following formula:
V =
√
(P X R )
Where
V = Continuous rated DC or AC (rms) working voltage (V)
P = Rated power (W )
R = Resistance value (
X
)
PULSE LOAD BEHAVIOR
50
0
55
0
50
70
100
155
o
Tamb ( C)
Fig. 4
Maximum dissipation (P
max
) in percentage of rated power
as a function of the operating ambient temperature (T
amb
)
YNSC093
10
Pmax
(W)
4
10
3
Pulse limiting electric power
10
2
10
2512
2010
1218
1206
1
10
2
0805
10
1
1
10
1
10
2
10
3
Fig. 5
Pulse-Load behavior
Pulse duration t i (ms)
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Mar 18, 2011 V.1
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