Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.

Contact our sales representatives before you use our products for applications including automotives, medical equipment and aerospace equipment.

Malfunction or failure of the products in such applications may cause loss of human life or serious damage.

www.koaglobal.com

THICK FILM（PRECISION）

RK73H FlatChipResistors(PrecisionGrade)

■Construction

Coating color：Black（1F, 1H）,

Blue（1E, 1J, 2A, 2B, 2E, W2H, W3A, W3A2）

■Features

・Wide lineup from 01005 to 2512 size.

・Excellent heat resistance and weather resistance are ensured by

the use of metal glaze thick film.

・Suitable for both flow and reflow solderings.

・Products with lead free termination meet EU-RoHS requirements.

EU-RoHS regulation is not intended for Pb-glass contained in

electrode, resistor element and glass.

・AEC-Q200 Tested (Exemption 1F).

■Reference Standards

 IEC 60115-8

 JIS C 5201-8

 EIAJ RC-2134C

① Protective coating

② Resistive film

③ Inner electrode

④ Ni plating

⑤ Solder plating

⑥ Ceramic substrate

L

c

c

W

t

d

③

②

①

④

⑤

⑥

■Type Designation

　Example

※2 With type A（1E,1J,2A,2B）only T is available as the terminal surface material.

※3 Products with gold plated electrodes are also available with 1E, 1J and 2A types（10Ω∼1MΩ）, so please consult with us.

※4 With type 1F, 1H, W2H, W3A, W3A2 only T is available as the terminal surface material.

The terminal surface material lead free is standard.

Contact us when you have control request for environmental hazardous material other than the substance specified by EU-RoHS.

For further information on taping, please refer to APPENDIX C on the back pages.

■Dimensions

EU

RoHS

※1 RK73H 2H, 3A and 3A2 are also still available (different“d”dimensions=0.4＋0.2

−0.1

mm)

■Ratings

Type

Power

Rating

Rated Ambient

Temp.

Rated Terminal

Part Temp.

T.C.R.

（×10−6/K）

Resistance Range（Ω）

Max. Working

Voltage

Max.

Overload

Voltage

Packaging & Q'ty/Reel（pcs）

D:±0.5%

E24・E96

F:±1%

E24・E96

TX

TBL

TCM※8

TPL・TP

TD

TE

1F

0.03W

70℃

—

±200

—

100k～2M※5

20V

30V

40,000

20,000

—

—

—

—

±250

10～91k※5

1H

0.05W

70℃

125℃

±200

10～1M

10～10M※5

25V

50V

—

—

15,000

—

—

—

±400

—

1～9.1※5

1E

0.1W

70℃

125℃

±100

10～1M

10～1M

75V

100V

—

—

—

TPL：20,000

TP ：10,000

—

—

±200

—

1～9.76

1.02M～10M

1J

0.1W

70℃

125℃

±100

1.02k～1M

1.02k～1M

—

—

—

TP ：10,000※7

5,000

—

±200

—

1.02M～10M

0.125W

±100

10～1k

10～1k

±200

—

1～9.76

2A

0.25W

70℃

125℃

±100

10～1M

10～1M

150V

200V

—

—

—

TP ：10,000※7

5,000

4,000※7

±200

—

1～9.76

±400

1.02M～10M

2B

0.25W

70℃

125℃

±100

10～1M

10～1M

200V

400V

—

—

—

—

5,000

4,000※7

±200

—

1～9.76

1.02M～5.6M

±400

5.62M～10M

2E

0.5W

70℃

125℃

±100

10～1M

10～1M

—

—

—

—

5,000

4,000※7

±200

—

1～9.76

1.02M～5.6M

±400

5.62M～10M

W2H

0.75W

70℃

125℃

±100

10～1M

10～1M

—

—

—

—

—

4,000

±200

—

1～9.76

1.02M～5.6M

±400

5.62M～10M

W3A

1W

70℃

125℃

±100

10～1M

10～1M

200V

400V

—

—

—

—

—

4,000

±200

—

1～9.76

1.02M～5.6M

±400

5.62M～10M

W3A2

2W※6

70℃

95℃

±100

10～1M

10～1M

200V

400V

—

—

—

—

—

4,000

±200

—

1～9.76

1.02M～5.6M

±400

5.62M～10M

Operating Temperature Range :−55℃∼＋125℃（1F）、−55℃∼＋155℃（1H・1E・1J・2A・2B・2E・W2H・W3A・W3A2）

Rated voltage＝ Power Rating×Resistance value or Max. working voltage, whichever is lower.

For flat chip jumper resistor, please refer to RK73Z series.

※5 The nominal resistance value for RK73H1F（10Ω≦R≦2MΩ）and RK73H1H（1Ω≦R≦9.1Ω, 1MΩ≦R≦10MΩ）is E24.

※6 If you use at the rated power, please keep the condition that the terminal of the resistor is below the rated terminal part temperature. Please refer to the derating curves based on the terminal temperature of right side on the next page.

※7 Standard packaging：TD(4mm pitch punch paper)

※8 Standard taping specification of 1H is TCM. Previously available“TC(10,000pcs/Reel)”is not recommended for new designs.

If any questions arise whether to use the“Rated Ambient Temperature”or the“Rated Terminal Part Temperature”in your usage conditions, please give priority to the“Rated Terminal Part Temperature”.

For more details, please refer to“Introduction of the derating curves based on the terminal part temperature”on the beginning of our catalog.

While using under high power, the temperature of the product may increase depending on the condition of heat dissipation from PCB.

Be sure to check the terminal part temperature as well as precautions to use on delivery specifications before use.

√￣￣￣￣￣￣￣￣￣￣￣

Type

（Inch Size Code）

Dimensions（mm）

Weight（g）

（1000pcs）

L

W

c

d

t

1F（01005）

0.4±0.02

0.2±0.02

0.10±0.03 0.11±0.03 0.13±0.02

0.04

1H（0201）

0.6±0.03

0.3±0.03

0.1±0.05 0.15±0.05 0.23±0.03

0.14

1E（0402）

1.0＋0.1

－0.05

0.5±0.05

0.2±0.1

0.25＋0.05

－0.1

0.35±0.05

0.68

1E AT（0402）

0.25±0.10

0.3±0.15

1J（0603）

1.6±0.2

0.8±0.1

0.3±0.1

0.3±0.1

0.45±0.1

2.14

1J AT（0603）

0.35±0.15

0.5±0.2

2A（0805）

2.0±0.2

1.25±0.1

0.4±0.2

0.3＋0.2

－0.1

0.5±0.1

4.54

2A AT（0805）

0.45±0.25

0.6±0.2

0.55±0.10

2B（1206）

3.2±0.2

1.6±0.2

0.5±0.3

0.4＋0.2

－0.1

0.6±0.1

9.14

2B AT（1206）

0.55±0.35

0.8±0.2

2E（1210）

2.6±0.2

0.5±0.3

0.4＋0.2

－0.1

15.5

W2H（2010）※1

5.0±0.2

2.5±0.2

0.65±0.15

24.3

W3A（2512）※1

6.3±0.2

3.1±0.2

37.1

W3A2（2512）※1

Characteristic

Nil：Standard

A：Heat shock

resistance※2

Terminal

Surface Material

T：Sn

G：Au※3

（L：Sn/Pb※4）

Taping

TX：4mm width-

　　1mm pitch plastic

　　embossed

TBL・TCM：

2mm pitch

press paper

TPL・TP：

2mm pitch

punch paper

TD：4mm pitch

punch paper

TE：4mm pitch

plastic

embossed

BK：Bulk

Nominal

Resistance

4 digits

Resistance

Tolerance

D：±0.5%

F：±1%

RK73H

2B

T

TD

1002

F

Product

Code

Power

Rating

1F：0.03W

1H：0.05W

1E：0.1W

1J：0.1W

0.125Ｗ

2A：0.25Ｗ

2B：0.25W

2E：0.5W

W2H：0.75W

W3A：1W

W3A2：2W※5

Jul. 2022

Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.

Contact our sales representatives before you use our products for applications including automotives, medical equipment and aerospace equipment.

Malfunction or failure of the products in such applications may cause loss of human life or serious damage.

www.koaglobal.com

Oct. 2022