Trapezoid Aluminum Shell Resistor

(RAMH Series)

FEATURES :

High power and Excellent load life stability and Low price Small size.

The strongly resistant to moistures test, solvent and insulation resistance.
Self-extinguish material is used in molding. both standard winding type and non-inductive
　 winding type are available.
Terminal arrangements should be separately specified with UL certify.
High surge resistant items are also available.

 

CHARACTERISTICS：
ITEM
SPEC
REMARKS

Short time over load

 

 △R±(2%+0.05Ω) MAX

10 × wattage rating 5sec.

 

Moisture resistance

 

 △R±(3%+0.05Ω) MAX

Temp. 40°C moisture 95%DC 100V 500Hrs

 

Moisture load life

 

 △R±(3%+0.05Ω)MAX

Temp 40°C moisture 95% 1/10 X wattage rating

(1.5Hr ON 0.5Hr OFF)-Repeat 1000Hr

Load life

 

 △R±(5%+0.05Ω)MAX Load rating(chases is mounted) (1.5Hrs ON 0.5Hrs OFF) repeat 1,000Hrs

Vibration

 

 △R±(1%+0.05Ω)MAX 10c/s~50c/s~10c/s( lmin)-2Hrs. each of paralleled and right angle

Heat resistance

 

 △R±(0.5%+0.05Ω)MAX 275℃  2Hrs.

Dielectric strength

 

 △R±(0.2%+0.05Ω)MAX AC1,500V

Insulation resistance

 

 100MΩmin Under the same test condition of Dielectric strength. Load the DC500V and measure the Insulation R.

Temp. coeff. of resistance

 

 ±260ppm/℃  MAX Measured at room temperature and room temperature+100℃

Operating temp.

 

 -55℃~+250℃ ------

 

Derating Curve：

 

DIMENSIONS：

Position

Resistance Range

A±0.3

B±0.5

C±0.5

D±1.0

E±1.0

F±1.0

G±0.3

H±0.5

I±0.3

L1±2

L2±2

60W

0.001～5 KΩ

2.5

23.5

26

28

60

55

4

12

6

50

80

80W

0.001～6 KΩ

2.5

23.5

26

28

60

55

4

12

6

60

90

100W

0.001～8 KΩ

2.5

23.5

26

28

60

55

4

12

6

75

105

120W

0.001～10 KΩ

2.5

23.5

26

28

60

55

4

12

6

90

120

150W

0.001～12 KΩ

2.5

23.5

26

28

60

55

4

12

6

120

150

200W

0.001～15 KΩ

2.5

23.5

26

28

60

55

4

12

6

140

170

300W

0.001～18 KΩ

2.5

23.5

26

28

60

55

4

12

6

180

210

400W

0.001～20 KΩ

2.5

23.5

26

28

60

55

4

12

6

230

260

500W

0.001～25 KΩ

2.5

23.5

26

28

60

55

4

12

6

300

330

600W

0.001～30 KΩ

2.5

23.5

26

28

60

55

4

12

6

360

390

800W

0.001～30 KΩ

2.5

23.5

25

28

60

55

4

12

6

400

430

 

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