WK73
resistors
c
L
c
UNDER
DEVELOP.
wide terminal type flat chip resistors
EU
features
•
Flat chip resistors of wide terminal type
•
High reliability and performance with T.C.R.
±100 x 10
-6
/K, resistance tolerance ±1%
•
Marking: Black protective coat
•
Products with lead-free terminations meet EU 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 and construction
Type
(Inch Size Code)
L
Dimensions
inches
(mm)
W
c
d
t
W
2B
(0612)
2H
(1020)
2J
(1218)
3A
(1225)
.063±.006 .126±.006 .012±.008 .018±.006
(1.6±0.15) (3.2±0.15) (0.3±0.2) (0.45±0.15)
.098±.006 .197±.006 .016±.008
(2.5±0.15) (5.0±0.15) (0.4±0.2)
.122±.006 .181±.006 .016±.008 .030±.006
(3.1±0.15) (4.6±0.15) (0.4±0.2) (0.75±0.15)
.122±.006 .252±.006 .018±.008
(3.1±0.15) (6.4±0.15) (0.45±0.2)
t
d
Inner
Resistive Electrode
Film
Solder
Plating
Ni
Plating
.024±.004
(0.6±0.1)
Protective
Coating Ceramic
Substrate
Derating Curve
100
80
% Rated Power
60
40
20
0
-60 -40 -20
-55
0
80 100 120 140 160
70
155
Ambient Temperature
(°C)
20
40
60
ordering information
New Part #
WK73S
Type
WK73S
WK73R
2J
Size
2B: 0.75W
2H: 1W
2J: 1W
3A: 1.5W
T
Termination
Material
T: Sn
TE
Packaging
TD: 0612: 7" 2mm pitch
punched paper
TDD: 0612 10" paper tape
TE: 1020, 1218, 1225:
7" punched plastic
TED: 1020, 1218, 1225:
10" punched plastic
For further information on
packaging, please refer
to Appendix A
33L0
Nominal
Resistance
±1%: 3 significant
figures + 1 multiplier
“R” indicates decimal
on value <100Ω
±5%: 2 significant
figures + 1 multiplier
“R” indicates decimal
on values <10Ω
All values less than 0.1Ω
(100mΩ) are expressed in
mΩ with “L” as decimal.
Ex: 33mΩ, 1% = 33L0
F
Resistance
Tolerance
F: ±1%
J: ±5%
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
11/07/08
30
KOA Speer Electronics, Inc.
• 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
KOA [ KOA SPEER ELECTRONICS, INC. ]
