KOA SPEER ELECTRONICS, INC.
SS-239 R4
AHA 12/05/07
CERTIFIED
Low Resistance Flat Chip Resistors
CERTIFIED
Type SR73
1. Scope
This specification applies to chip resistors (SR73) produced by KOA Corporation.
2. Type Designation
The type designation shall be in the following form:
SR73
2B
Size
T
TD
Packaging
1R00
F
Termination
Material
Tolerance
Nominal
Size
Resistance
TP: 2mm Pitch Punched
Paper Tape
2ꢀ, 5ꢀ: 2 significant figures ꢁ
1 multiplier “R” indicates decimal
on value <10Ω
1E
1J
D: 0.5ꢀ
F: 1ꢀ
G: 2ꢀ
J: 5ꢀ
T: Sn
(Other termination
styles may be
available, please
contact factory
for options)
(0402, 0603 & 0805)
2A
2B
2E
2H
3A
TD: 7" Paper Tape
1ꢀ: 3 significant figures ꢁ 1
multiplier “R” indicates decimal
on value <100Ω
(0603, 0805, 1206 & 1210)
TDD: 10" Paper Tape
(0603, 0805, 1206 &1210)
All values less than 0.1Ω (100mΩ)
are expressed in mΩ with “L” as
decimal Example: 20mΩ = 20L0
TE: 7" Punched Plastic
(0805, 1206, 1210,
2010 & 2512)
TED: 10" Punched Plastic
(0805, 1206, 1210,
2010 & 2512)
3. Dimensions and Structure
3-1 Dimensions
Type
(Inch Size Code)
Dimensions inches (mm)
L
W
c
d
t
L
c
c
.039 ꢁ.004
.02 ꢁ.004
1E
(0402)
-.002
-.002
.01 .004 .01 .004 .014 .002
(0.5 ꢁ0.1
)
(0.25 0.1) (0.25 0.1) (0.35 0.05)
-0.05
(1.0 ꢁ0.1
)
-0.05
.031 ꢁ.006
W
1J
.063 .008
(1.6 0.2)
-.004 .014 .004 .014 .004 .018 .004
Solder
Plating
(0.8 ꢁ0.15
)
(0603)
(0.35 0.1) (0.35 0.1) (0.45 0.1)
.012 ꢁ.008
-0.1
Ni
2A
(0805)
.079 .008 .049 .004 .016 .008
(2.0 0.2) (1.25 0.1) (0.4 0.2)
-.004
.02 .004
(0.5 0.1)
t
Plating
(0.3 ꢁ0.2
)
-0.1
Protective
Coating
Resistive Inner
Film Electrode
d
2B
.063 .008
.016 ꢁ.008
(1206)
(1.6 0.2)
.126 .008
(3.2 0.2)
-.004
Ceramic
Substrate
(0.4 ꢁ0.2
)
2E
(1210)
.102 .008
(2.6 0.2)
-0.1
.02 .012
(0.5 0.3)
.024 .004
(0.6 0.1)
2H
(2010)
.197 .008 .098 .008
(5.0 0.2) (2.5 0.2)
.025 .005
(0.65 0.15)
3A
(2512)
.248 .008 .122 .008
(6.3 0.2) (3.1 0.2)
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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.
KOA [ KOA SPEER ELECTRONICS, INC. ]
