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ROP
CYLINDRICAL CEMENT
RESISTORS

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Differing from the more common rectangular type of cement resistor, these cylindrical types offer great dielectric withstanding voltage, insulation resistance anti-surge as well as low TCR.  Low lead time and automatic insertion make these components particularly useful. Wire wound and power film elements available.

Applications:  Power supplies, battery chargers, lighting, AC/DC converters, UPS, semicon burn-in boards, inrush prevention circuits.

GENERAL CHARACTERISTICS

Characteristic

Value

Resistance Range – Wire Wound

0.1-150R

Resistance Range – Power Film

151-50KR

Maximum Working Voltage

350V

GENERAL SPECIFICATIONS

Test Items

Condition

Spec

Test Method

JIS-C-5202

TCR

-55 to 155C

+-300ppm/C

5.2

Short Time Overload

10 X Rated Power, 5 sec.

+-2%

5.5

Rated Load

Rated Wattage, 30 min.

+-1%

5.4

Dielectric Withstanding Voltage

1000VAC, 1 min.

No change

5.7

Insulation Resistance

500V Megger

1000MR

5.6

Load Life

70C, ON/OFF cycle 1000hrs.

+-5%

7.1

Moisture Proof Load Life

40C, 95%RH, ON/OFF cycle 1000hrs.

+-5%

7.9

Non-Flammability

16 X Rated Wattage, 5 min.

No Flame

7.12

TECHNICAL NOTES:

1/  Working Voltage = root (rated power X resistance value) or 350V, whichever is less
2/  1W, 2W, 3W versions also available
3/  Other ohmic values are also available, please check with RARA design team
4/  Max. Overload Voltage = 2 X max. working voltage
5/  Power film short time overload is 5 X rated wattage for 5 sec.

CONSTRUCTION DIAGRAM

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DIMENSIONS

DERATING CURVE

ORDERING PROCEDURE EXAMPLE

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Tel:82-32-817-4325 Fax:82-32-817-4329

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