KOA SPEER ELECTRONICS, INC.
SS-239 R4
AHA 12/05/07
Low Resistance Flat Chip Resistors
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:
CERTIFIED
CERTIFIED
SR73
Size
2B
Size
1E
1J
2A
2B
2E
2H
3A
T
Termination
Material
T: Sn
(Other termination
styles may be
available, please
contact factory
for options)
TD
Packaging
TP: 2mm Pitch Punched
Paper Tape
(0402, 0603 & 0805)
TD: 7" Paper Tape
(0603, 0805, 1206 & 1210)
TDD: 10" Paper Tape
(0603, 0805, 1206 &1210)
TE: 7" Punched Plastic
(0805, 1206, 1210,
2010 & 2512)
TED: 10" Punched Plastic
(0805, 1206, 1210,
2010 & 2512)
1R00
Nominal
Resistance
±2%, ±5%: 2 significant figures +
1 multiplier “R” indicates decimal
on value <10Ω
±1%: 3 significant figures + 1
multiplier “R” indicates decimal
on value <100Ω
All values less than 0.1Ω (100mΩ)
are expressed in mΩ with “L” as
decimal Example: 20mΩ = 20L0
F
Tolerance
D: ±0.5%
F: ±1%
G: ±2%
J: ±5%
3. Dimensions and Structure
3-1 Dimensions
c
L
c
Type
(Inch Size Code)
L
.039
+.004
-.002
(1.0
+0.1
-0.05
)
Dimensions
inches (mm)
W
c
d
.02
+.004
-.002
(0.5
+0.1
-0.05
)
t
1E
(0402)
1J
(0603)
2A
(0805)
2B
(1206)
2E
(1210)
2H
(2010)
3A
(2512)
.01±.004 .01±.004 .014±.002
(0.25±0.1) (0.25±0.1) (0.35±0.05)
W
Solder
Plating
t
d
Protective
Coating
Resistive Inner
Film
Electrode
Ni
Plating
+.006
.063±.008 .031
-.004
.014±.004 .014±.004 .018±.004
(1.6±0.2) (0.8
+0.15
) (0.35±0.1) (0.35±0.1) (0.45±0.1)
-0.1
.079±.008 .049±.004 .016±.008
(2.0±0.2) (1.25±0.1) (0.4±0.2)
.063±.008
.126±.008 (1.6±0.2)
(3.2±0.2) .102±.008
(2.6±0.2)
.197±.008 .098±.008
(5.0±0.2) (2.5±0.2)
.248±.008 .122±.008
(6.3±0.2) (3.1±0.2)
.012
+.008
-.004
(0.3
+0.2
-0.1
)
.02±.004
(0.5±0.1)
Ceramic
Substrate
.016
+.008
-.004
.02±.012
(0.5±0.3)
(0.4
+0.2
)
-0.1
.024±.004
(0.6±0.1)
.025±.005
(0.65±0.15)
PAGE 1 OF 8
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.