RARA ELECTRONICS COMPANY-IRV/IRH Specifications

K SERIES NON-FLAMMABLE WIRE
WOUND FIXED RESISTORS

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GENERAL SPECIFICATIONS

Model

Power Rating[W]

Resistance Range [OHM]

Standard

S type

KH

KHIS

KZG

15

1.0-15K

3K

20

1.0-20K

4K

30

1.5-30K

4K

40

2.0-40K

6K

50

2.0-50K

8K

60

1.5-60K

12K

80

2.0-80K

15K

100

2.5-100K

20K

120

3.0-120K

25K

150

4.0-150K

30K

200

5.0-200K

40K

300

8.0-200K

60K

400

10.0-300K

80K

500

10.0-400K

90K

600

10.0-500K

100K

700

10.0-600K

110K

1000

10.0-900K

120K

1200

10.0-1000K

130K

1500 10.0-1100K 140K

2000 10.0-1200K 150K

Tolerance:
1ohm less than or equal to R: +-5%[J]
1ohm greater than R: +-10%[K]

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

Temp. Coefficient

+-200ppm/C max.

Power Rating Load

Change in R/R ≤+-[1%+0.05OHM]                                                                          350C max.

Short Time Overload

Change in R/R ≤+-[2%+0.05OHM]                                           1000% rated power 5 secs

Insulation Resistance

100MOHM min. DC 500V

Dielectric Withstanding V.

KG, KH : AC 1500V 1 min., KHZ, KZG : AC 3000V 1 min.

Terminal Strength

5-20W : 4.5kgf, H20-40W : 6kgf, 60-200W : 8kgf, 300-400W : 10kgf-30secs

Resistors Strength

5W-40W: 20kgf, 60W-400W : 30kgf-30secs

Vibration

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

Solderability

75% coverage min. 270C 5 secs.

Heat Resistance

350C 2 hrs

Thermal Shock

Change in R/R ≤+-[2%+0.05OHM]                      Power rating load-30min. –55C-15min.

Humidity (Steady state)

Change in R/R ≤+-[2%+0.05OHM,10MOHM min.]                         40C, 95%RH, 500 hrs.

Load Life in Humidity

Change in R/R ≤+-[2%+0.05OHM]   See Note1

Load Life

Change in R/R ≤+-[5%+0.05OHM]          Power rating, 90 min. ON, 30min OFF, 500hrs.

Flame Retardancy

100-600% rated power load

Note1: 0.1XP rating, 90min. ON, 30min. OFF, 40C, 95%RH, 500hrs.
Note2: Applied voltage - AC RMS voltage

SURFACE TEMPERATURE INCREASE VERSUS POWER LOAD & DERATING



PERCENTAGE POWER DECREASE IN GROUPED APPLICATIONS

Interval

State

2EA

3EA

4EA

5EA

6EA

7EA

8EA

9EA

10EA

11EA

12EA

40mm

Open

63

56

51

47

45

43

40

38

36

34

32

Close

54

47

43

41

38

36

34

32

31

29

27

45mm

Open

70

64

60

56

53

50

48

46

44

42

40

Close

60

54

51

47

45

42

41

39

37

36

34

50mm

Open

73

68

64

60

58

56

55

54

52

50

49

Close

62

58

54

51

49

47

46

45

44

43

42

55mm

Open

77

70

67

64

63

60

59

58

57

56

56

Close

65

59

57

54

53

51

50

49

48

47

47

75mm

Open

82

76

72

68

66

65

64

63

62

61

60

Close

70

64

61

58

56

55

54

53

52

51

50

DIMENSIONS

     KH Type

     KHIS Type

            KZG Type

Model

Power
Rating
[w]

Dimensions [mm]

A

B

C

D

E

F

I

J

K

L

M

N

P

Q

O

T

KH

KHIS

KZG

15

17

50

20

8.5

5.0

2.8

4.2

18

22

41

71

86

26

3.5

6.0

0.5

20

17

50

20

8.5

5.0

2.8

4.2

18

22

41

71

86

26

3.5

6.0

0.5

30

17

75

20

8.5

5.0

2.8

4.2

18

22

41

99

110

26

3.5

6.0

0.5

40

17

90

20

8.5

5.0

2.8

4.2

18

22

41

115

124

26

3.5

6.0

0.5

50

28

75

33

14.0

8.0

4.0

6.0

26

30

62

110

133

35

4.2

8.5

1.4

60

28

90

33

14.0

8.0

4.0

6.0

26

30

62

128

148

35

4.2

8.5

1.4

80

28

115

33

14.0

8.0

4.0

6.0

26

30

62

150

173

35

4.2

8.5

1.4

100

28

140

33

14.0

8.0

4.0

6.0

26

30

62

175

198

35

4.2

8.5

1.4

120

28

165

33

14.0

8.0

4.0

6.0

26

30

62

200

221

35

4.2

8.5

1.4

150

28

195

33

14.0

8.0

4.0

6.0

26

30

62

230

253

35

4.2

8.5

1.4

200

28

254

33

14.0

8.0

4.0

6.0

26

30

62

290

313

35

4.2

8.5

1.4

300

42

254

45

24.0

12.0

5.5

6.5

40

40

86

300

330

52

5.0

12.0

1.6

400

42

330

45

24.0

12.0

5.5

6.5

40

40

86

380

407

52

5.0

12.0

1.6

500

52

300

57

29.0

15.0

9.0

6.5

54

41

99

345

362

53

5.0

12.0

2.2

600

52

330

57

29.0

15.0

9.0

6.5

54

41

99

375

392

53

5.0

12.0

2.2

700

65

330

65

46.0

20.0

10.0

10.0

65

59

126

385

404

75

10.0

20.0

2.2

1000

77

330

71

47.0

20.0

10.0

10.0

75

63

130

388

408

80

10.0

20.0

2.2

1200

77

330

71

47.0

20.0

10.0

10.0

75

63

130

388

408

80

10.0

20.0

2.2

1500 77 400 71 47 20 10 10 75 63 130 458 478 80 10 20 2.2

2000 77 500 71 47 20 10 10 75 63 130 558 578 80 10 20 2.2

SHORT TIME OVER LOAD RATING

Load time(sec)

1

2

3

4

5

10

30

60

180

300

600

900

Max Rated Load(%)

2600

2000

1600

1400

1300

1000

600

450

200

150

120

110

ORDERING PROCEDURE EXAMPLE

Model	Power Rating[W]	Resistance Range [OHM]
Model	Power Rating[W]	Standard	S type
KH KHIS KZG
	15	1.0-15K	3K
	20	1.0-20K	4K
	30	1.5-30K	4K
	40	2.0-40K	6K
	50	2.0-50K	8K
	60	1.5-60K	12K
	80	2.0-80K	15K
	100	2.5-100K	20K
	120	3.0-120K	25K
	150	4.0-150K	30K
	200	5.0-200K	40K
	300	8.0-200K	60K
	400	10.0-300K	80K
	500	10.0-400K	90K
	600	10.0-500K	100K
	700	10.0-600K	110K
	1000	10.0-900K	120K
	1200	10.0-1000K	130K
	1500	10.0-1100K	140K
	2000	10.0-1200K	150K

Temp. Coefficient	+-200ppm/C max.
Power Rating Load	Change in R/R ≤+-[1%+0.05OHM] 350C max.
Short Time Overload	Change in R/R ≤+-[2%+0.05OHM] 1000% rated power 5 secs
Insulation Resistance	100MOHM min. DC 500V
Dielectric Withstanding V.	KG, KH : AC 1500V 1 min., KHZ, KZG : AC 3000V 1 min.
Terminal Strength	5-20W : 4.5kgf, H20-40W : 6kgf, 60-200W : 8kgf, 300-400W : 10kgf-30secs
Resistors Strength	5W-40W: 20kgf, 60W-400W : 30kgf-30secs
Vibration	Mount : KG type, 1.5mm 10-55Hz/1min.X,Y,Z 2 hours.
Solderability	75% coverage min. 270C 5 secs.
Heat Resistance	350C 2 hrs
Thermal Shock	Change in R/R ≤+-[2%+0.05OHM] Power rating load-30min. –55C-15min.
Humidity (Steady state)	Change in R/R ≤+-[2%+0.05OHM,10MOHM min.] 40C, 95%RH, 500 hrs.
Load Life in Humidity	Change in R/R ≤+-[2%+0.05OHM] See Note1
Load Life	Change in R/R ≤+-[5%+0.05OHM] Power rating, 90 min. ON, 30min OFF, 500hrs.
Flame Retardancy	100-600% rated power load

Interval	State	2EA	3EA	4EA	5EA	6EA	7EA	8EA	9EA	10EA	11EA	12EA
40mm	Open	63	56	51	47	45	43	40	38	36	34	32
40mm	Close	54	47	43	41	38	36	34	32	31	29	27
45mm	Open	70	64	60	56	53	50	48	46	44	42	40
45mm	Close	60	54	51	47	45	42	41	39	37	36	34
50mm	Open	73	68	64	60	58	56	55	54	52	50	49
50mm	Close	62	58	54	51	49	47	46	45	44	43	42
55mm	Open	77	70	67	64	63	60	59	58	57	56	56
55mm	Close	65	59	57	54	53	51	50	49	48	47	47
75mm	Open	82	76	72	68	66	65	64	63	62	61	60
75mm	Close	70	64	61	58	56	55	54	53	52	51	50

Model	Power Rating [w]	Dimensions [mm]
Model	Power Rating [w]	A	B	C	D	E	F	I	J	K	L	M	N	P	Q	O	T
KH KHIS KZG
	15	17	50	20	8.5	5.0	2.8	4.2	18	22	41	71	86	26	3.5	6.0	0.5
	20	17	50	20	8.5	5.0	2.8	4.2	18	22	41	71	86	26	3.5	6.0	0.5
	30	17	75	20	8.5	5.0	2.8	4.2	18	22	41	99	110	26	3.5	6.0	0.5
	40	17	90	20	8.5	5.0	2.8	4.2	18	22	41	115	124	26	3.5	6.0	0.5
	50	28	75	33	14.0	8.0	4.0	6.0	26	30	62	110	133	35	4.2	8.5	1.4
	60	28	90	33	14.0	8.0	4.0	6.0	26	30	62	128	148	35	4.2	8.5	1.4
	80	28	115	33	14.0	8.0	4.0	6.0	26	30	62	150	173	35	4.2	8.5	1.4
	100	28	140	33	14.0	8.0	4.0	6.0	26	30	62	175	198	35	4.2	8.5	1.4
	120	28	165	33	14.0	8.0	4.0	6.0	26	30	62	200	221	35	4.2	8.5	1.4
	150	28	195	33	14.0	8.0	4.0	6.0	26	30	62	230	253	35	4.2	8.5	1.4
	200	28	254	33	14.0	8.0	4.0	6.0	26	30	62	290	313	35	4.2	8.5	1.4
	300	42	254	45	24.0	12.0	5.5	6.5	40	40	86	300	330	52	5.0	12.0	1.6
	400	42	330	45	24.0	12.0	5.5	6.5	40	40	86	380	407	52	5.0	12.0	1.6
	500	52	300	57	29.0	15.0	9.0	6.5	54	41	99	345	362	53	5.0	12.0	2.2
	600	52	330	57	29.0	15.0	9.0	6.5	54	41	99	375	392	53	5.0	12.0	2.2
	700	65	330	65	46.0	20.0	10.0	10.0	65	59	126	385	404	75	10.0	20.0	2.2
	1000	77	330	71	47.0	20.0	10.0	10.0	75	63	130	388	408	80	10.0	20.0	2.2
	1200	77	330	71	47.0	20.0	10.0	10.0	75	63	130	388	408	80	10.0	20.0	2.2
	1500	77	400	71	47	20	10	10	75	63	130	458	478	80	10	20	2.2
	2000	77	500	71	47	20	10	10	75	63	130	558	578	80	10	20	2.2