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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.

11/19/08

RW

coat insulated miniature precision

power wirewound resistors

Part

Designation

Max.

Overload

Voltage

Power Rating

applications and ratings

V

RW1/2

RW1/2N

RW1

RW7

RW1N

RW7N

RW2

RW10

RW2N

0.5W

1.0W

2.0W

7.0W

10W

500V

1 - 45.3k

—

1 - 60.4k

1 - 45.3k

36 - 44.2k

1 - 60.4k

0.1 - 47k

±20:R

≥10Ω

±50:1

Ω≤R

<10

Ω

±90:R<1

Ω

36 - 43k

0.1 - 62k

D±0.5%

(E96)

F±1%

(E96)

H±3%

(E24)

J±5%

(E24)

T.C.R.

(ppm/°C)

Resistance Range (

Ω)

Derating Curve

environmental applications

100

80

60

40

20

-100

-50

0

50100350

Ambient Temperature

(°C)

0

-55

150

200300

275

250

25

V

U

350

250

200

150

04080120

% Rated Power

0

160

50

100

RW2

RW1/2, RW1, RW3, RW5

RW7, RW10

300

200

Surface Temperature Rise

600

400

10

1k

RW1N

RW1N

RW1

0

Frequency (Hz)

10k

100

1

RW1

1000

100M

100k

RW1N

1M

10M

200

800

RW1

Resistance

T.C.R.

25°C

U: +25°C/-55°C, +25°C/+125°C and +25°C/+275°C

V: +25°C/-55°C, +25°C/+125°C and +25°C/+350°C

Within regulated tolerance

Within specified T.C.R.

Performance Characteristics

Parameter

Requirement

∆ R ±(% + 0.05Ω)

Test Method

Overload (Short time)

Rated power x 5 or Max. overload voltage, whichever is lower for 5 seconds

0.2: U

Resistance to Solder Heat

350°C ± 10°C, 3 seconds ± 0.5 seconds or 260°C ± 5°C,

10 seconds ± 1 second

0.1

Moisture Resistance

Power rating x 1/10, 40°C, 90 - 95% RH, 1000 hours,

1.5 hr ON/0.5 hr OFF cycle

0.2: U

2: V

Endurance @ 25°C

25°C, 2000 hours

1.5 hr ON/0.5 hr OFF cycle

0.5: U

3: V

High Temperature Exposure

Max.

Working

Voltage

RW3

RW3N

RW5

RW5N

3.0W

5.0W

RW10N

—

62 - 49.9k

62 - 51k

U

—

—

3.0W

10W

14W

5.0W

7.0W

10 - 2.61k

—

1 - 5.11k

—

1 - 10k

—

1 - 15k

—

1 - 30.1k

—

10 - 2.61k

10 - 2.37k

1 - 5.11k

10 - 3.74k

1 - 10k

15 - 10k

1 - 15k

15 - 15k

1 - 30.1k

20 - 29.4k

0.47 - 2.7k

10 - 2.4k

0.1 - 5.1k

10 - 3.6k

0.1 - 10k

10 - 10k

0.1 - 15k

15 - 15k

0.1 - 30k

20 - 30k

0.1 - 47k

36 - 43k

0.1 - 62k

62 - 51k

0.47 - 2.7k

10 - 2.4k

0.1 - 5.1k

10 - 3.6k

0.1 - 10k

10 - 10k

0.1 - 15k

15 - 15k

0.1 - 30k

20 - 30k

80V

130V

140V

600V

1000V

200V

400V

150V

300V

800V

1500V

600V

700V

Frequency Characteristics

2: V

Rated power x 10 or Max. overload voltage, whichever is lower for 5 seconds

275

-0

0.2: U

2: V

350

-0

Operating Temperature Range: Characteristic U: -55°C ~ +275°C, V: -55°C ~ +350°C

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4:11 PM

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