requirements. EU RoHS regulation is not intended for
Pb-glass contained in electrode, resistor element and glass.
dimensions and construction
UR73
a
L
a
Size
Code
D1E
(0402)
D1J
(0603)
D2A
(0805)
2A
(0805)
D2B
(1206)
2B
(1206)
Resistance
Range (Ω)
24m ~ 100m
L
Dimensions
inches
(mm)
W
h
a
b
.039
+.004
.020
+.004
-.002
-.002
+0.1
(1.0
-0.05
)
W
.016±.002 .010±.004 .012±.004
+0.1
(0.5
-0.05
) (0.4±0.05) (0.25±0.1) (0.3±0.1)
h
b
Protective
Coating
Resistive Inner
Film
Electrode
Ni
Plating
.022±.004
+.005
10m ~ 27m
.063±.008 .031
-.004
.02±.004 .014±.004
(0.55±0.1)
30m ~ 100m
(1.6±0.2) (0.8
+0.15
) (0.5±0.1) (0.35±0.1)
.014±.004
-0.1
(0.35±0.1)
.024±.008
10m ~ 16m
.079±.008 .049±.008 .022±.004 .016±.008
(0.6±0.2)
18m ~ 30m
(2.0±0.2) (1.25±0.2) (0.55±0.1) (0.4±0.2)
.02±.008
(0.5±0.2)
33m ~ 100m
.079±.008 .049±.008 .02±.004 .016±.008
Ceramic
Substrate
.012
+.008
-.004
(0.3
+0.2
)
-0.1
UR73D
a
L
a
(2.0±0.2) (1.25±0.2) (0.55±0.1) (0.4±0.2)
W
Solder
Plating
Ni
Plating
b
Resistive
Film
Ceramic Protective
Substrate Coating
Inner
Electrode
.039±.008
10m ~ 16m
.126±.008 .063±.008 .024±.004 .020±.008
(1.0±0.2)
18m ~ 27m
(3.2±0.2) (1.6±0.2) (0.6±0.1) (0.5±0.2)
.031±.008
(0.8±0.2)
+.008
.126±.008 .063±.008 .024±.004 .020±.012 .016
-.004
30m ~ 100m
(3.2±0.2) (1.6±0.2) (0.6±0.1) (0.5±0.3) (0.4
+0.2
)
-0.1
h
D2H
(2010)
D3A
(2512)
.063±.012
10m ~ 30m
.197±.008 .098±.008 .026±.004 .026±.012
(1.6±0.3)
33m ~ 100m
(5.0±0.2) (2.5±0.2) (0.65±0.1) (0.65±0.3)
.026±.012
(0.65±0.3)
.079±.012
10m ~ 30m
.248±.008 .122±.008 .024±.004 .031±.012
(2.0±0.3)
33m ~ 100m
(6.3±0.2) (3.1±0.2) (0.6±0.1) (0.8±0.3)
.031±.012
(0.8±0.3)
ordering information
New Part #
UR73
Type
UR73
UR73D
2A
Power
Rating
1E: 0.125W
1J: 0.2W
2A: 0.25W
2B: 0.5W
2H: 0.75W
3A: 1W
T
Termination
Material
T: Sn
TD
Packaging
TP: 2mm pitch
punch paper
(1E)
TD: 7" punched
paper tape
(1J, 2A, 2B)
TE: 7" embossed plastic
(2H, 3A)
R100
Nominal
Resistance
“R” indicates decimal
on values = 100Ω
Ex: R100 = 100Ω
“L” indicates decimal
on values <100mΩ
Ex: 10L0 = 10mΩ
F
Tolerance
F: ±1%
For further information on packaging, please refer to Appendix A.
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
11/21/16
72
KOA Speer Electronics, Inc.
• 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
current sensing chip resistor
applications and ratings
Part
Designation
Power
Rating
Rated
Ambient
Temperature
70°C
Rated Terminal
Part Temp.
T.C.R.
(ppm/°C)
Max.
±100
±500
±100
UR73D1J
UR73D2A
UR732A
UR73D2B
UR732B
UR73D2H
UR73D3A
1/5W (.2W)
1/4W (.25W)
1/4W (.25W)
1/2W (.5W)
1/2W (.5W)
3/4W (.75W)
1W (1W)
70°C
70°C
70°C
70°C
70°C
70°C
70°C
80°C
85°C
90°C
85°C
85°C
90°C
95°C
±200
±300
±250
±100
±250
±200
±100
±200
±250
±100
±250
±100
Resistance Range
F (±1%) E-24,
25mΩ, 50mΩ
30mΩ - 100mΩ
24mΩ - 27mΩ
47mΩ - 100mΩ
30mΩ - 43mΩ
10mΩ - 27mΩ
10mΩ - 30mΩ
47mΩ - 100mΩ
33mΩ - 43mΩ
10mΩ - 27mΩ
47mΩ - 100mΩ
30mΩ - 43mΩ
10mΩ - 30mΩ
33mΩ - 100mΩ
10mΩ - 30mΩ
33mΩ - 100mΩ
-55°C
to
+125°C
Operating
Temperature
Range
UR73D1E*
1/8W (.125W)
—
* Please contact factory prior to use Rated voltage =
√P•R
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.
environmental applications
Derating Curve
100
80
% Rated Power
Surface Temperature Rise
UR73 2A, 2B 33mΩ
100
100
80
% Rated Power
60
40
20
0
-60 -40 -20
-55
D1J/0.2W (80°C)
2B/0.5W, D2A/0.25W,
D2B/0.5W (85°C)
2A/0.25W, D2H/0.75W (90°C)
D3A/1W (95°C)
UR73D 1J, 2A, 2B, 2H, 3A 10mΩ
UR73D 1E 24mΩ
100
3A (1)
2H (1)
60
40
20
0
-60 -40
-55
Temperature Rise
(°C)
Temperature Rise
(°C)
75
2B (1)
2B (2)
2A (1)
2A (2)
75
3A (2)
2H (2)
2B (1)
50
50
2B (2)
2A (1)
1J (1)
1E (1)
2A (2)
1J (2)
1E (2)
-20
0
80
70
Ambient Temperature
(°C)
20
40
60
100 120
140
125
0
60 80
100 120 140
85 90 95
125
Terminal Part Temperature
(°C)
20
40
25
25
For resistors operated at an ambient
temperature of 70°C or above, a power
rating shall be derated in accordance
with the above derating curve.
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 prior use.
0
0
25
50
75
100
0
0
25
50
75
100
% Rated Power
1
2
% Power Rating
1
2
Performance Characteristics
Parameter
Resistance
T.C.R.
Overload (Short time)
Resistance to Solder Heat
Rapid Change of Temperature
Moisture Resistance
Endurance at 70°C
High Temperature Exposure
Requirement
∆
R ±(%+0.005Ω)
Limit
Typical
Within specified
—
tolerance
Within specified
—
T.C.R.
±2%
±0.5%
±1%
±1%
±2%
±2%
±1%
±0.3%
±0.5%
±1%
±1%
±0.3%
Regarding the temperature rise, the value of the temperature varies per
conditions and board for use since the temperature is measured under
