KOA SPEER ELECTRONICS, INC.
SS-258 R6
AHA 6/20/08
CERTIFIED
Current Sensing Chip Resistor
CERTIFIED
UR73 Type
1. Features
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Utilization of thick film
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Very low resistance, high precision reliability
Suitable for reflow and flow soldering
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Low T.C.R. achieved ( 100 ppm/°C)
Products with lead-free terminations meet RoHS requirements. Pb located in glass material,
electrode and resistor element is exempt per Annex 1, exemption 5 of EU directive 2005/95/EC
Dimensions inches (mm)
Size
Resistance
Range
2. Dimensions
UR73
Code
L
W
h
a
b
.039 +.004 .020 +.004
L
a
a
-.002
-.002
.016 .002 .010 .004 .012 .004
(0.4 0.05) (0.25 0.1) (0.3 0.1)
24m ~ 100m
D1E
D1J
D2A
2A
+0.1
-0.05
+0.1
(0.5 )
-0.05
(1.0
)
W
.022 .004
(0.55 0.1)
.014 .004
(0.35 0.1)
.031 +.005
10m ~ 27m
30m ~ 100m
-.004
.063 .008
(1.6 0.2)
.02 .004 .014 .004
(0.5 0.1) (0.35 0.1)
(0.8 +0.15
)
-0.1
Ni
h
Plating
.024 .008
(0.6 0.2)
.02 .008
(0.5 0.2)
10m ~ 16m
18m ~ 30m
.079 .008 .049 .008 .022 .004 .016 .008
(2.0 0.2) (1.25 0.2) (0.55 0.1) (0.4 0.2)
Protective
Coating
Resistive Inner
b
Film
Electrode
Ceramic
Substrate
.012 +.008
-.004
.079 .008 .049 .008 .02 .004 .016 .008
(2.0 0.2) (1.25 0.2) (0.55 0.1) (0.4 0.2)
33m ~ 100m
(0.3 +0.2
)
-0.1
L
UR73D
.039 .008
a
a
(1.0 0.2)
10m ~ 16m
18m ~ 27m
.126 .008 .063 .008 .024 .004 .020 .008
D2B
2B
(3.2 0.2) (1.6 0.2) (0.6 0.1) (0.5 0.2)
.031 .008
(0.8 0.2)
W
b
.016 +.008
-.004
.126 .008 .063 .008 .024 .004 .020 .012
(3.2 0.2) (1.6 0.2) (0.6 0.1) (0.5 0.3)
30m ~ 100m
(0.4 +0.2
)
Solder
Plating
-0.1
h
Ni
Plating
.063 .012
(1.6 0.3)
.026 .012
(0.65 0.3)
10m ~ 30m
33m ~ 100m
.197 .008 .098 .008 .026 .004 .026 .012
(5.0 0.2) (2.5 0.2) (0.65 0.1) (0.65 0.3)
Resistive
Film
Inner
D2H
D3A
Electrode
Protective
Coating
Ceramic
Substrate
.079 .012
(2.0 0.3)
.031 .012
(0.8 0.3)
10m ~ 30m
33m ~ 100m
.248 .008 .122 .008 .024 .004 .031 .012
(6.3 0.2) (3.1 0.2) (0.6 0.1) (0.8 0.3)
3. Type Designation
The type designation shall be in the following form:
UR73
2A
T
TD
R10
F
Termination
Material
Nominal
Resistance
Tolerance
Packaging
Type
Size Code
TP: 2mm pitch punch paper
(1E: 10,000 pcs/reel)
TD: 7" punched paper tape
(1J, 2A, 2B: 5,000 pcs/reel)
TE: 7" embossed plastic
(2H, 3A: 4,000 pcs/reel)
UR73
UR73D
1E: 0.125W
1J: 0.2 W
2A: 0.25 W
2B: 0.5 W
2H: 0.75W
3A: 1 W
T: Sn
All values less than 0.1Ω (100mΩ) are
expressed in mΩ with “L” as decimal.
Ex: 20mΩ = 20L0
F: 1%
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Bolivar Drive
P.O. Box 547
Bradford, PA 16701
USA
814-362-5536
Fax 814-362-8883
www.koaspeer.com
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.