WK73
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
L
Type
Dimensions inches (mmꢁ
c
c
(Inch Size Code)
L
W
c
d
t
W
2B
(0612)
.063 .006 .126 .006 .012 .008 .018 .006
(ꢀ.6 0.ꢀ5ꢁ (3.ꢂ 0.ꢀ5ꢁ (0.3 0.ꢂꢁ (0.45 0.ꢀ5ꢁ
Solder
Plating
2H
(1020)
.098 .006 .197 .006 .016 .008
(ꢂ.5 0.ꢀ5ꢁ (5.0 0.ꢀ5ꢁ (0.4 0.ꢂꢁ
Ni
t
Plating
Inner
.024 .004
(0.6 0.ꢀꢁ
Electrode
Resistive
Film
d
2J
(1218)
.122 .006 .181 .006 .016 .008 .030 .006
(3.ꢀ 0.ꢀ5ꢁ (4.6 0.ꢀ5ꢁ (0.4 0.ꢂꢁ (0.75 0.ꢀ5ꢁ
Protective
Coating
Ceramic
Substrate
3A
(1225)
.122 .006 .252 .006 .018 .008
(3.ꢀ 0.ꢀ5ꢁ (6.4 0.ꢀ5ꢁ (0.45 0.ꢂꢁ
Derating Curve
100
80
60
40
20
0
-60 -40 -20
-55
0
20 40 60 80 100 120 140 160
70
Ambient Temperature
(°C)
155
ordering information
New Part #
WK73S
2J
T
TE
33L0
F
Termination
Material
Nominal
Resistance
Resistance
Tolerance
Type
Size
Packaging
TD: 0612: 7" 2mm pitch
punched paper
WK73S
WK73R
2B: 0.75W
2H: 1W
2J: 1W
T: Sn
1%: 3 significant
figures + 1 multiplier
“R” indicates decimal
on value <100Ω
F: 1%
J: 5%
TDD: 0612 10" paper tape
TE: 1020, 1218, 1225:
7" punched plastic
3A: 1.5W
5%: 2 significant
figures + 1 multiplier
“R” indicates decimal
on values <10Ω
TED: 1020, 1218, 1225:
10" punched plastic
For further information on
packaging, please refer
to Appendix A
All values less than 0.1Ω
(100mΩ) are expressed in
mΩ with “L” as decimal.
Ex: 33mΩ, 1% = 33L0
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. ]
