Approval sheet
SR12, SR10, SR08, SR06, SR04
1%, 5%
Thick Film High Grade General Purpose
Chip Resistors
Size 1206, 1210, 0805, 0603, 0402
Automotive & Military Qualified
Anti-Sulfuration
*Contents in this sheet are subject to change without prior notice.
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ASC_SR_V05
JAN 2018
Approval sheet
FEATURE
1. High reliability and stability ±1%
2. Sulfuration resistant ASTM B-809 105’C 750hrs
3. Automotive AEC Q-200 & Military MIL-STD qualified
4. 100% CCD inspection
5. RoHS compliant and Halogen free products
APPLICATION
Automotive application
Consumer electrical equipment
EDP, Computer application
Telecom application
DESCRIPTION
The resistors are constructed in a high grade ceramic body (aluminum oxide). Internal metal electrodes are
added at each end and connected by a resistive paste that is applied to the top surface of the substrate. The
extra protective metal film is added onto top side electrodes to protect termination from sulfuration. The
composition of the paste is adjusted to give the approximate resistance required and the value is trimmed to
within tolerance by laser cutting of this resistive layer.
The resistive layer is covered with a protective coat. Finally, the two external end terminations are added. For
ease of soldering the outer layer of these end terminations is a Tin (lead free) alloy.
Fig 1. Construction of a Chip-R
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ASC_SR_V05
JAN 2018
Approval sheet
QUICK REFERENCE DATA
Item
General Specification
Series No.
SR10
SR12
SR08
SR06
SR04
Size code
1210(3225)
1206(3216)
0805(2012)
0603(1608)
0402(1005)
Resistance
Range
1~10M (5% tolerance), Jumper
1~10M (1% tolerance)
Resistance
Tolerance
1%
5%
1%
5%
1%
5%
1%
5%
1%
5%
E96/E24
E24
E96/E24
E24
E96/E24
E24
E96/E24
E24
E96/E24
E24
TCR (ppm/C)
R > 1M
200
200
200
200
200
10 < R ≦ 1M
100
100
100
100
100
-200~+400
-200~+400
-200~+400
-200~+400
-200~+400
Max.
dissipation @
Tamb=70C
1/2 W
1/4 W
1/4 W
1/10 W
1/10 W
Max. Operation
Voltage (DC or
RMS)
200V
200V
150V
75V
50V
Max. Overload
Voltage (DC or
RMS)
400V
400V
300V
150V
100V
R ≦ 10
Operation
temperature
-55 ~ +155C
Note :
1.
Max. Operation Voltage : So called RCWV (Rated Continuous Working Voltage) is determined by
RCWV RatedPower Resistance Value or Max. RCWV listed above, whichever is lower.
DIMENSIONS (unit : mm)
SR10
SR12
SR08
SR06
SR04
L
3.10 0.10
3.10 0.10
2.00 0.10
1.60 0.10
1.00 0.05
W
2.60 0.10
1.60 0.10
1.25 0.10
0.80 0.10
0.50 0.05
t
0.55 0.10
0.60 0.15
0.50 0.15
0.45 0.15
0.35 0.05
d
0.50 0.20
0.45 0.20
0.40 0.20
0.30 0.15
0.25 0.10
c
0.50 0.20
0.50 0.20
0.40 0.20
0.30 0.10
0.20 0.10
Page 3 of 9
ASC_SR_V05
JAN 2018
Approval sheet
MARKING
5%
1%
1210/1206/0805
3-digits marking
4-digits marking
0603 (1608)
3-digits marking
3-digits marking
Size \ Nr. Of digit of code\tolerance
N0 MARKING
0402(1005)
3-digits marking(5% : 1210 & 1206 & 0805 & 0603 )
Each resistor is marked with a three digits code on the protective coating to designate the nominal resistance value.
3-digits marking(1% : 0603)
Nominal resistance
Description
1.E-24 series
As 0603 WR06X 5%.
2.E-96 series
The 1st two digit codes are referring to the CODE on the table, the 3rd code is the index of resistance
value :
Y=10-2,X=10-1,A=100,B=101,C=102,D=103,E=104,F=105
EX :
17.8Ω=25X,178Ω=25A,1K78 =25B
17K8=25C, 178K=25D, 1M78=25E
3. Remark
There is no marking for the items are not under E-24 and E-96 series
CODE
R_value
CODE
R_value
CODE R_Value CODE
R_value
CODE
R_value
CODE
R_value
CODE
R_value
CODE
R_value
01
100
13
133
25
178
37
237
49
316
61
422
73
562
85
750
02
102
14
137
26
182
38
243
50
324
62
432
74
576
86
768
03
105
15
140
27
187
39
249
51
332
63
442
75
590
87
787
04
107
16
143
28
191
40
255
52
340
64
453
76
604
88
806
05
110
17
147
29
196
41
261
53
348
65
464
77
619
89
825
06
113
18
150
30
200
42
267
54
357
66
475
78
634
90
845
07
115
19
154
31
205
43
274
55
365
67
487
79
649
91
866
08
118
20
158
32
210
44
280
56
374
68
499
80
665
92
887
09
121
21
162
33
215
45
287
57
383
69
511
81
681
93
909
10
124
22
165
34
221
46
294
58
392
70
523
82
698
94
931
11
127
23
169
35
226
47
301
59
402
71
536
83
715
95
953
12
130
24
174
36
232
48
309
60
412
72
549
84
732
96
976
4-digits marking(1% : 1210/1206/0805)
Each resistor is marked with a four digits code on the protective coating to designate the nominal resistance value.
Example
RESISTANCE
10
12
100
6800
47000
3-digits marking(1210/1206/0805/0603 5% )
100
120
101
682
473
10R0
12R0
1000
6801
4702
4-digits marking
Page 4 of 9
ASC_SR_V05
JAN 2018
Approval sheet
FUNCTIONAL DESCRIPTION
Product characterization
Standard values of nominal resistance are taken from the E24 series for resistors with a tolerance of 5%,
and E96 series for resistors with a tolerance of 1%. The values of the E24/E96 series are in accordance with
“IEC publication 60063”
Derating
The power that the resistor can dissipate depends on the operating temperature; see Fig.2
Figure 2
Maximum dissipation in percentage of rated power as a
function of the ambient temperature
MOUNTING
Due to their rectangular shapes and small tolerances, Surface Mountable Resistors are suitable for handling by
automatic placement systems.
Chip placement can be on ceramic substrates and printed-circuit boards (PCBs).
Electrical connection to the circuit is by individual soldering condition.
The end terminations guarantee a reliable contact.
Page 5 of 9
ASC_SR_V05
JAN 2018
Approval sheet
SOLDERING CONDITION
The robust construction of chip resistors allows
them to be completely immersed in a solder bath
of 260C for 10 seconds. Therefore, it is possible
to mount Surface Mount Resistors on one side of
a PCB and other discrete components on the
reverse (mixed PCBs).
Surface Mount Resistors are tested for
solderability at 235C during 2 seconds. The test
condition for no leaching is 260C for 30 seconds.
Typical examples of soldering processes that
provide reliable joints without any damage are
given in Fig 3.
Fig 3. Infrared soldering profile for Chip Resistors
CATALOGUE NUMBERS
The resistors have a catalogue number starting with .
SR12
Automotive
code
SR10 : 1210
SR12 : 1206
SR08 : 0805
X
472_
T
L
Type code
Resistance code
Tolerance
Packaging code
Termination code
X:
5%, E24: 2 significant digits
F : 1%
T
L = Sn base
Jumper
followed by no. of
J : 5%
Q : 10” Reeled taping
5%, 1 ~ 10M
zeros and a blank
P : Jumper
G : 13” Reeled taping
1%, 10 ~ 1M
220 = 221_
W:
(“_” means a blank)
SR06 : 0603
SR04: 0402
J
1%, < 10; >1M
B
: 7” Reeled taping
(lead free)
: Bulk
1%, E24+E96: 3 significant
digits followed by no. of
zeros
E24: 102 = 1020
E96: 37.4K = 3742
* Anti-Sulfur test conditions: ASTM B-809 105’C, RH 90%, 750hrs, acceptance criteria: +/-2.0%.
SR10, SR12, SR08, SR06:
1.
Reeled tape packaging : 8mm width paper taping 5000pcs per 7” reel, 10kpcs per 10” reel, 20kpcs per 13” reel.
2.
Bulk packaging
: 5000pcs per poly-bag
SR04:
1.
Reeled tape packaging : 8mm width paper taping 10,000pcs per reel.
2.
Bulk packaging
Page 6 of 9
: 10,000pcs per poly-bag
ASC_SR_V05
JAN 2018
Approval sheet
TEST AND REQUIREMENTS
Essentially all tests are carried out according to the schedule of IEC publication 115-8, category
LCT/UCT/56(rated temperature range : Lower Category Temperature, Upper Category Temperature; damp
heat, long term, 56 days). The testing also meets the requirements specified by EIA, EIAJ and JIS.
The tests are carried out in accordance with IEC publication 68, “Recommended basic climatic and mechanical
robustness testing procedure for electronic components” and under standard atmospheric conditions according
to IEC 60068-1, sub-clause 5.3. Unless otherwise specified, the following value supplied :
Temperature: 15°C to 35°C.
Relative humidity: 45% to 75%.
Air pressure: 86kPa to 106 kPa (860 mbar to 1060 mbar).
All soldering tests are performed with midly activated flux.
TEST
Electrical Characteristics - DC resistance values measurement
JISC5201-1: 1998
Clause 4.8
REQUIREMENT
PROCEDURE / TEST METHOD
Resistor
0
Within the specified tolerance
- Temperature Coefficient of Resistance (T.C.R)
Refer to “QUICK REFERENCE
Natural resistance change per change in degree centigrade.
DATA”
R2 R1
106
R1 t2 t1
(ppm/C)
t1 : 20°C+5°C-1°C
R1 : Resistance at reference temperature
R2 : Resistance at test temperature
Resistance to soldering
Un-mounted chips completely immersed for 10±1second in a SAC
R/R max. (0.5%+0.05)
heat (R.S.H)
solder bath at 270℃±5ºC
No visible damage
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