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OA Series

OPEN FRAME
LOW INDUCTANCE
AXIAL TYPE
  • 1 W TO 3 W
  • R 003 TO R 10

Physical configuration

HTR TYPE

POWER RATING at 70°C

DIMENSIONS (mm)

RESISTANCE RANGE

L1

MIN

MAX
OA-1 1W 11mm TO 15mm R003 R051
OA-2 2W 16.3mm TO 21mm R0041 R068
OA-3 3W 28mm TO 33mm R0056 R10

NOTE:
Resistance values must be checked using 4 ½ digit micro ohm meter with four wire system and insulated clips, which should be attached to the resistor leads 10mm from the weld point.

TYPICAL APPLICATIONS:
The OA series offers a non insulated, non-inductive resistor having high stability / overload capacity.The solder plated copper terminals are spot welded to the alloy resistive element forming a very reliable all welded construction, which is finding increasing usage in switching and linear power supplies, instruments, regulators and other modern current sensing circuits.

MARKING:
Due to the nature of their construction, these resistors cannot be marked however, the resistance value & other relevent details will be on the packing box.

Electrical And Environmental Characteristics/Data

 

Test Performance Requirements
Resistance tolerance ± 10% [ K];    ± 5% [J];  ± 2% [G]
Rated ambient temperature at 70° C full power dissipation
Insulation resistance Nil
Temperature co-efficient ±200 ppm/°C to ±1200 ppm/°C depending on resistance value
Short time overload Max D R ± 2%
Moisture resistance Max D R ± 3%
Load Life Max D R ± 5%
Ambient operating temperature range -25° C to +250° C

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