HOME   INTRO   HISTORY   PRODUCTS   NEWS

KR SERIES NON-FLAMMABLE
WIRE WOUND
FIXED RESISTORS

Download
PDF File

GENERAL SPECIFICATIONS

Model

Power Rating [W]

Resistance
Range [ohms]

Weight
[g]

KR

KRIB

KRG

KRZG

80

120

0.02-4

140

100

150

0.03-5

170

120

180

0.03-6

200

150

225

0.04-8

250

200

300

0.05-10

306

300

450

0.08-15

650

400

600

0.10-20

800

CHARACTERISTICS                                                  Values in [ ] mean change in ohmic value after test

Temp. Coefficient

+-400ppm/C max.

Power Rating Load

[Change in R/R +-1%]                                                                                        375C max.

Short Time Overload

[Change in R/R +-2%]                                                             300% rated power 5 sec.

Insulation Resistance

100Mohm min. DC 500V

Dielectric Withstanding V.

KR, KRZ: AC 2000V 1 min., KRZG: AC 3000V 1 min.

Terminal Strength

10mm:  20KgF 30sec., 16mm:  20KgF 30sec.

Resistor Strength

30FgF 30sec.

Vibration

Mount: KRG type, 1.5mm 10-55Hz/1min.X,Y,Z 2 hours.

Heat Resistance

375C 2 hrs.

Thermal Shock

[Change in R/R +-2%]                                    Power rating load-30min. –55C-15min.

Humidity (Steady state)

[Change in R/R +-2%,10 M ohm min.]                                         40C, 95%RH, 500 hrs.

Load Life in Humidity

[Change in R/R +-2%]    10% Rated P, 90m. ON, 30min OFF, 40C, 95%RH, 500hrs.

Load Life

[Change in R/R +-5%]                          Power rating, 90 min. ON, 30min OFF, 500hrs.

Flame Retardancy

100-600% rated power load

SHORT TIME OVER LOAD RATING

An overload exceeding the normal current is allowed for a short duration of 30 minutes or less

Load time(sec)

5

10

30

60

180

300

600

900

1800

Max Rated Load(%)

400%

350%

250%

200%

140%

120%

110%

105%

100%

NEMA ON-OFF CYCLING

Cycling
Time
[sec]

5sec. ON
74sec. OFF

10sec. ON
70sec. OFF

15sec. ON
45sec. OFF

15sec. ON
45sec. OFF

15sec. ON
30sec. OFF

15sec. ON
15sec. OFF

Max Amps Rated Load

290%

245%

185%

160%

150%

125%

CURRENT REDUCTION RATE (%) FOR GROUPED APPLICATIONS

EA

2

3

4

6

9

12

16

%

84

80

78

76

75

73

71

DIMENSIONS

Model

Shape

Dimensions [mm]

A

C

D

E

F

G

H

J

K

(l)

l

M

P

Q

R

T

KR

KRIB

KRG

KRZG

80

8

4

28

14

26

26

30

6

33

115

150

173

35

140

161

1.4

100

8

4

28

14

26

26

30

6

33

140

175

198

35

168

189

1.4

120

8

4

28

14

26

26

30

6

33

165

200

221

35

190

212

1.4

150

8

4

28

14

26

26

30

6

33

195

230

253

35

220

242

1.4

200

8

4

28

14

26

26

30

6

33

254

290

313

35

280

300

1.4

300

12

5.5

42

24

40

40

40

6.5

45

254

300

330

52

285

316

1.6

400

12

5.5

42

24

40

40

40

6.5

45

330

380

407

52

360

388

1.6

DERATING CURVE AND TEMPERATURE RISE DATA

 

STANDARD RESISTANCE VALUES AND MAXIMUM CURRENT

 

Ohmic Value

Model

0.02

0.03

0.04

0.05

0.06

0.08

0.1

0.15

0.2

0.25

0.3

0.4

0.5

0.6

K-80

77A

63

55

50

45

39

35

28

25

22

20

17

15

14

K-100

 

71A

61

55

50

43

39

32

27

25

22

19

17

16

K-120

 

78A

67

60

55

48

43

35

30

27

24

21

19

18

K-150

 

 

75A

67

61

53

47

39

33

30

27

24

21

19

K-200

 

 

 

77A

71

61

55

45

39

35

32

27

24

22

K-300

 

 

 

 

 

75A

67

55

47

42

39

33

30

27

K-400

 

 

 

 

 

 

77A

63

55

49

45

39

35

31

 

Ohmic Value

Model

0.8

1.0

1.5

2.0

2.5

3.0

4.0

5.0

6.0

8.0

10.0

12.0

15.0

20.0

K-80

12

11

9

7.8

6.9

6.3

5.5

 

 

 

 

 

 

 

K-100

14

12

10

8.6

7.8

7.1

6.1

5.5

 

 

 

 

 

 

K-120

15

13

11

9.5

8.5

7.8

6.7

6.1

5.3

 

 

 

 

 

K-150

17

15

12

11

9.5

8.7

7.5

6.7

6.1

5.3

 

 

 

 

K-200

19

17

14

12

11

10

8.6

7.7

7.1

6.1

5.5

 

 

 

K-300

24

21

17

15

13.5

12

10

9.5

8.6

7.5

6.7

6.1

5.5

 

K-400

27

24

20

17

15.1

14

12

11

10

8.7

7.7

7.0

6.3

5.5

ORDERING PROCEDURE EXAMPLE

Copyright©, RARA Electronics Corporation
Tel:82-32-817-4325 Fax:82-32-817-4329

Rara electronics Sitemap Rara electronics main contents
Home
Intro
History
News
Email
Wirewound
Power Film
SMD
RF
Current Sensing
Precision
High Voltage
NGR, Load Bank, Motor Control
Inductors
Circuit Protection

Wire Wound Resistors


High Power Shunt Resistors


Current Sensing resistors


Metal Clad Resistors


Loadbanks


High Power Resistors


High Voltage Resistors


High Precision Resistors


Precision Power Resistors


Thick Film Resistors


Precision Thin Film Resistors


Rara Eletronics

rotary potentiometers


variable resistor potentiometer


rotary potentiometer manufacturers


rotary potentiometer switch


single turn potentiometer


control potentiometer


carbon potentiometers


ceramic composition resistors


ceramic composition resistor


ceramic power resistors


resistor ceramic


rotary dip switches

dip switch settings


3 position dip switch


dip switch manufacturer


dip swich


mini rotary switch


high power shunt resistors


loadbanks