CURRENT SENSE/LOW OHM OPEN FRAME TYPE TM OA/OP SERIES OPEN FRAME Low Inductance Axial / PCB Mounting ! 1 Watt To 3 Watts ! R 003 To R 10 PHYSICAL CONFIGURATION 38 +1 38 +1 LM(+1) OA SERIES (AXIAL) L1 0.8 +0.05 Side View Weld Point <4.0mm 3.0mm [+0.5] Profile Dimensions HTR POWER TYPE RATING AT 70C DIMENSIONS (mm) L1 LM RESISTANCE TYPICAL RANGE WT PER min max PC (gms) OA-1 1W 11 to 15 40 R003 R051 0.5 OA-2 2W 16.3 to 22.5 45 R0041 R068 0.6 OA-3 3W 28 to 35.5 60 R0056 R10 0.7 Note : Resistance values must be checked using 41/2 digit micro ohm meter with four wire system and insulated clips, which should be attached to the resistor leads over centered length "LM" in the case of OA series and at the weld points in OP series. OP SERIES (PCB MOUNTING) < 4.0mm H 4.5+1 MP 0.8/1.0 Weld Point P MP-Measurement Point Cone 0 - 10 Side View Profile Dimensions Note : For 0.5W to 1.5W the terminations will be tin plated copper 0.8mm. For 3W the terminations will be tin plated copper 1.0mm HTR TYPE POWER RATING AT 70C OP-0.5 0.5W DIMENSIONS (mm) H P (max) +1mm 10.0 7.0 RESISTANCE TYPICAL RANGE WT PER min max PC (gms) R003 R051 0.3 OP-1 1W 10.0 11.0 R0041 R068 0.4 OP-1A 1W 15.0 9.0 R0041 R068 0.4 OP-1.5 1.5W 10.0 17.5 R0056 R10 0.5 OP-1.5A 1.5W 15.0 15.5 R0056 R10 0.5 OP-1.5B 1.5W 20.0 12.5 R0056 R10 0.5 OP3 3W 10.0 18.0 R0056 R10 0.55 OP3A 3W 15.0 16.0 R0056 R10 0.55 OP3B 3W 20.0 13.0 R0056 R10 0.55 ELECTRICAL AND ENVIRONMENTAL CHARACTERISTICS / DATA Test Performance Requirements Resistance tolerance +10% [K]; +5% [J]; +3% [H]; +2% [G]; +1% [F] Rated ambient temperature at 70C full power dissipation Insulation resistance Nil Temperature co-efficient + 200 ppm/ C to + 1200 ppm/ C depending on resistance value and power rating. (measured from - 55C to 125C, referenced to +25) Short time overload Max R+1.5% Moisture resistance Max R+0.5% Load life Max R+3% (Average) Ambient operating temperature range -40C to +155C TYPICAL APPLICATIONS The OA/OP series offer a non insulated - non-inductive resistor having high stability/overload capacity. The tin plated copper terminals are butt 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. For the effective utilisation of these resistors, please refer "Applications / Design notes for current-sense resistors". MARKING Due to the nature of their construction these resistors cannot be marked with all relevant details on the resistive element, however resistance value, tolerance and date code will be marked on the device. All other relevant details will be on the packing box. For complete details please refer to marking specifications. ORDERING INFORMATION OA/OP OA-1/OP-1 R047 J TOLERANCE RESISTANCE VALUE HTR TYPE SERIES OA/Op CURRENT SENSE/LOW OHM CERAMIC ENCASED TYPE TM