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KOA Speer Electronics, Inc. • 199 Bolivar Drive • 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.

12/04/12

RK73-RT

flat chip resistors (anti-sulfuration)

features

Derating Curve

100

80

60

40

20

-60

-40

-20

0

40

6080100140

70

20

Ambient Temperature

(°C)

0

-55

120

155

Protective

Coating

Inner

Electrode

Resistive

Film

Ceramic

Substrate

Solder

Plating

Ni

Plating

L

c

c

W

t

d

dimensions and construction

Type

L

-.002

-0.05

-.004

-0.1

-.004

-0.1

-.004

-0.1

.014±.002

(0.35±0.05)

.018±.004

(0.45±0.1)

.012±.004

(0.3±0.1)

.02±.004

(0.5±0.1)

.024±.004

(0.6±0.1)

.008±.004

(0.2±0.1)

.012±.004

(0.3±0.1)

.016±.008

(0.4±0.2)

.02±.012

(0.5±0.3)

.063±.008

(1.6±0.2)

.102±.008

(2.6±0.2)

.098±.008

(2.5±0.2)

.122±.008

(3.1±0.2)

.023±.006

(0.65±0.15)

.126±.008

(3.2±0.2)

.049±.004

(1.25±0.1)

.031±.004

(0.8±0.1)

.02±.002

(0.5±0.05)

.063±.008

(1.6±0.2)

.079±.008

(2.0±0.2)

.197±.008

(5.0±0.2)

.248±.008

(6.3±0.2)

1E

(0402)

1J

(0603)

2A

(0805)

2B

(1206)

W2H

(2010)

W3A

(2512)

(Inch Size Code)

Wc

d

t

Dimensions inches

(mm)

2E

(1210)

ordering information

D: ±0.5%

F: ±1%

G: ±2%

J: ±5%

RT: Sn

Anti-Sulfur

RK73B:

3 digits

RK73H:

4 digits

RK73Z:

None

1E

1J

2A

2B

2E

W2H

W3A

RK73B

RK73H

RK73Z

RK73H

Type

Power

Rating

Nominal

Resistance

Resistance

Tolerance

Termination

Surface Material

Packaging

New Part #

2A

TD

1002

F

RT

EU

due to using high sulfuration-proof inner

top electrode material

resistance are ensured by the use of metal glaze thick film

structure of electrode

RK73B1E ~ W3A, RK73Z1J ~ W3A: Black

protective coating

RK73H1E ~ W3A: Blue protective coating

requirements. EU RoHS regulation is not intended for

Pb-glass contained in electrode, resistor element and glass.

1206 (2B), 1210 (2E), 2010 (W2H), 2512 (W3A)

TPL: 0402 only: 2mm pitch punch paper

TP: 0402, 0603, 0805: 7" 2mm pitch punch paper

TD: 0603, 0805, 1206, 1210:7" 4mm pitch punched paper

TDD: 0603, 0805, 1206, 1210: 10" paper tape

TE: 0805, 1206, 1210, 2010 & 2512: 7" embossed plastic

TED: 0805, 1206, 1210, 2010 & 2512: 10" embossed plastic

For further information on packaging, please refer to

Appendix A

For resistors operated at an ambient temperature of 70°C or above, a

power rating shall be derated in accordance with the above derating curve.