Current detecting resistors for power supply, motor circuits, etc
•
High reliability and performance with resistance
tolerance ±1.0％, T.C.R. ±100×10
-6
/K
•
Suitable for both reflow and flow solderings
•
Products with lead free termination meet EU RoHS
requirements. EU RoHS regulation is not intended for
Pb-glass contained in electrode, resistor element and glass.
•
AEC-Q200 Qualified
Resistance
(Inch Size Code)
Range
Type
L
.039
+.006
-.004
+0.1
(1.0
-0.05
)
.063±.008
(1.6±0.2)
Dimensions
inches
(mm)
W
c
d
.020
+.006
-.004
+0.1
(0.5
-0.05
)
.031
(0.8
+.006
-.004
+0.15
-0.1
)
t
dimensions and construction
c
L
c
1E (0402)
1J (0603)
1 - 10
0.1 - 0.43
0.47 - 10
.008±.004
(0.2±0.1)
.016±.004
(0.4±0.1)
.014±.004
(0.35±0.1)
.010±.004 .014±.002
(0.25±0.1) (0.35±0.05)
.018±.004
(0.45±0.1)
.014±.004
(0.35±0.1)
+.008
-.004
(0.4
+0.2
)
-0.1
.012
+.008
-.004
(0.3
+0.2
)
-0.1
.018±.004
(0.45±0.1)
W
Solder
Plating
t
d
Protective
Coating
Resistive Inner
Film
Electrode
Ni
Plating
0.1 - 0.43
.016
.079±.008
(2.0±0.2)
.049±.004
(1.25±0.1)
.016±.008
(0.4±0.2)
2A (0805)
0.47 - 10
.02±.004
(0.5±0.1)
0.1 - 0.43
2B (1206)
0.47 - 10
Ceramic
Substrate
.126±.008
(3.2±0.2)
.063±.008
(1.6±0.2)
.02±.012
(0.5±0.3)
+.008
-.004
(0.5
+0.2
)
-0.1
.02
0.1 - 0.39
2E (1210)
0.43 - 10
.126±.008
(3.2±0.2)
.102±.008
(2.6±0.2)
.02±.012
(0.5±0.3)
.016
+.008
-.004
(0.4
+0.2
)
-0.1
+.008
.02
-.004
(0.5
+0.2
)
-0.1
.016
+.008
-.004
(0.4
+0.2
)
-0.1
.024±.004
(0.6±0.1)
.024±.004
(0.6±0.1)
Derating Curve
SR73 2A (0.5W), SR73 2B (0.5W), SR73 2E (0.66W)
For resistors operated at an ambient temperature of 70°C
or above, a power rating shall be derated in accordance
with the derating curve.
ordering information
SR73
Type
2B
Size
NEW
1E: 0.166W
For resistors operated at a terminal part temperature of described for each size or above, a power rating shall be
derated in accordance with the derating curve.
Please refer to “Introduction of the derating curve based on the terminal part temperature” in the beginning of our
catalog before use.
RT
Termination
Material
RT: Sn
TD
Packaging
TD: 7" 4mm pitch punch paper
TP: 0402 only, 7" 2mm pitch paper
TPL: 0402 only, 2mm pitch paper
For further information on packaging,
please refer to Appendix A
R10
Nominal
Resistance
±2%, ±5%: 2 significant
figures + 1 multiplier “R”
indicates decimal on
values <10Ω
±1%: 3 significant figures
+ 1 multiplier “R” indicates
decimal on values <100Ω
J
Tolerance
F: ±1%
G: ±2%
J: ±5%
1J: 0.2W
2A: 0.33W, 0.5W
2B: 0.33W, 0.5W
2E: 0.5W, 0.66W
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
6/28/18
74
KOA Speer Electronics, Inc.
• 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
low resistance flat chip resistors
(anti sulfuration)
applications and ratings
Part
Designation
NEW
SR731ERT
(0402)
SR731JRT
(0603)
Power
Rating
Rated
Ambient
Temperature
70°C
70°C
Rated
Terminal
Part Temp.
125°C
125°C
T.C.R.
(ppm/°C)
Max.
±200
±200
0.2W
±300
±100
0.33W
SR732ART
(0805)
0.5W*
—
105°C
70°C
125°C
±200
±250
±100
±200
±250
±100
0.33W
SR732BRT
(1206)
0.5W*
—
110°C
70°C
125°C
±200
±250
±100
±200
±250
±100
0.5W
SR732ERT
(1210)
0.66W*
—
110°C
70°C
125°C
±200
±250
±100
±200
±250
Rated voltage =
√Power
rating x resistance value or max. working voltage, whichever is lower
1
Resistance Range
F (±1%)
E-24, E-96
1
1Ω - 10Ω
0.2Ω - 10Ω
0.1Ω - 0.18Ω
0.47Ω - 10Ω
0.2Ω - 0.43Ω
0.1Ω - 0.18Ω
0.47Ω - 10Ω
0.2Ω - 0.43Ω
0.1Ω - 0.18Ω
0.47Ω - 10Ω
0.2Ω - 0.43Ω
0.1Ω - 0.18Ω
0.47Ω - 10Ω
0.2Ω - 0.43Ω
0.1Ω - 0.18Ω
0.43Ω - 10Ω
0.2Ω - 0.39Ω
—
0.43Ω - 10Ω
0.2Ω - 0.39Ω
—
G (±2%)
E-24
1Ω - 10Ω
0.2Ω - 10Ω
0.1Ω - 0.18Ω
—
0.2Ω - 10Ω
0.1Ω - 0.18Ω
—
0.2Ω - 10Ω
0.1Ω - 0.18Ω
—
0.2Ω - 10Ω
0.1Ω - 0.18Ω
—
0.2Ω - 10Ω
0.1Ω - 0.18Ω
—
0.2Ω - 10Ω
—
—
0.2Ω - 10Ω
—
J (±5%)
E-24
1Ω - 10Ω
0.2Ω - 10Ω
0.1Ω - 0.18Ω
—
0.2Ω - 10Ω
0.1Ω - 0.18Ω
—
0.2Ω - 10Ω
0.1Ω - 0.18Ω
—
0.2Ω - 10Ω
0.1Ω - 0.18Ω
—
0.2Ω - 10Ω
0.1Ω - 0.18Ω
—
0.2Ω - 10Ω
0.1Ω - 0.18Ω
—
0.2Ω - 10Ω
0.1Ω - 0.18Ω
Operating
Temperature
Range
0.166W
-55°C
to
+155°C
The nominal resistance for SR731E (F:±1%), SR731J, 2A, 2B (0.1~0.43) and SR732E (0.1~0.39) is E-24 only
* Please use the derating curve based on the terminal part temperature in graph below.
If any questions should arise whether to use the “Rated Ambient Temperature” or the “Rated Terminal Part Temperature,” please give priority to the “Rated Terminal
Part Temperature.” Prior to use and for more details refer to “Introduction of the derating curves on the terminal part temperature” in the beginning of the catalog.
1、引言 汽车污染是当前人们最为关心和急需解决的重要课题之一。作为汽车排气污染物的检测的重要方法,简易瞬态工况法（VMAS法，IG法）可以统计排放总质量，监控车辆的真实排放情况，设备成本不高，测量比较准确，与新车认证检测结果具有相关性，可以检测NO相关因子等一系列优点，成为人们研究的热点。VMAS（Vehicle Mass Analysis System）检测方法在美国和欧洲都有很好的应用基础，...[详细]
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