This document provides information on low ohm power resistors including: - Power ratings from 1.0W to 1.5W at temperatures from -25°C to -70°C and possible customer specified versions. - Dimensions, resistance values from R015 to R16, current drawn at 100mV, maximum energy, and weight for each type. - De-rating curve showing load percentage vs ambient temperature and application in power supplies, instruments, and regulators. - Packaging of 1000 resistors per small box and ordering information.

1. • power rating at - 25° C. - Upto 1.5 w
• power rating at - 70° C. - Upto 0.7 w
• r015 to r16
• Customer Specified versions are
possible on request
LOW OHM POWER RESISTORS
OPEN FRAME WIRE TYPE
OW
SERIES
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rev Date : 22/05/2019
AEC-Q200Qualified

2. PHYSICAL CONFIGURATION
DIMENSIONAL TABLE
LOW OHM
POWER
RESISTORS
OPEN FRAME
WIRE TYPE-
OWSERIES
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HtrType Power rating Power rating Current 'I' drawn in Amp Maximum P.C.B. RESISTANCE WEIGHT
AT 25°C AT 70°C when 100mV voltage is Energy HOLE DIAMETER VALUE PER PC
applied (J) (mm) (Ohms) (gms)
OW1.5 1.5W 0.7W 6.67 14 1.3 R015 0.27
OW1.2 1.2W 0.6W 4.54 8.4 1.0 R022 0.19
OW1.2 1.2W 0.6W 3.03 7.3 1.0 R033 0.195
OW1.2 1.2W 0.6W 2.13 5.7 0.80 R047 0.136
OW1 1.0W 0.6W 1.47 3.9 0.80 R068 0.09
OW1 1.0W 0.6W 1.0 2.4 0.80 R10 0.065
OW1 1.0W 0.6W 0.77 2.3 0.80 R13 0.044
OW1 1.0W 0.6W 0.71 2.2 0.80 R14 0.045
OW1 1.0W 0.6W 0.67 2.1 0.80 R15 0.045
OW1 1.0W 0.6W 0.63 2.0 0.80 R16 0.04
0 50 100 150 200
100
90
80
70
60
50
40
30
20
10
0
Temperature Rise
K
Relative Load %
0 20 40 60 80 100 120
100
80
60
40
20
0
AmbientTemperature [oC]
De-Rating Curve% Nom
Load
10 amp V
By the artwork of the print, care should be taken that the conductor can carrythe load.
The curve shows the necessary width as a function of the current. (Cu 35 and T 20oC)
Example :- 10 ampere -› 5.5mm width of 35 Cu
Ч
Ч
APPLICATIONS :
• In switching and linear power supplies, instruments, regulators.
• In modern current sensing circuits.
(All dimensions in MM)
Rev Date : 22/05/2019

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PACKAGING
1000 Resistors shall be packed in small box " I Type" of approximate size 70mm x 70mm x 70mm & such 8 Boxes of "I Type"
will be packed in Master Carton of approx size 310mm x 205mm x 95mm
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ordering information
SERIES TYPE PACKING RESISTANCE VALUE TOLERANCE
OW OW1.2 / OW1.2* Bulk - OW1.2 / OW1.2* R033 J
Storage Condition (Packed) :
Temp 25°C to 35°C, Humidity 30 to 80% RH, Shelf life- 6 months
Floor Life (Unpacked) :
Temp 25°C to 35°C, Humidity 30 to 80% RH, Floor life-15 days
Resistance Material Data :
CuNi23Mn, CuNi44
For RoHs version - OW1.2
LOW OHM
POWER
RESISTORS
OPEN FRAME
WIRE TYPE-
OWSERIES
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ELECTRICAL AND ENVIRONMENTAL CHARACTERISTICS
PARAMETER / PERFORMANCE TEST & TEST METHOD PERFORMANCE REQUIREMENTS
Power Rating Full power dissipation at 70° C & linearly derated to zero at 110° C.
Insulation Not insulated
ResistanceTolerance Available (Can be achieved when
soldering in a plated through hole circuit board ) ± 10% (K); ± 5% (J)
Temperature Range - 55° C to +110° C with suitable derating as per derating curve above
Voltage Rating / LimitingVoltage / Max.WorkingVoltage P x R
ShortTime Overload (5 x Rated power for 5 secs) ∆R ± (0.75% + R0005) - Average
∆R ± (1.25% + R0005) - For resistance values near maximum range
Temperature Co-efficient of Resistance ± 400 ppm/° C & Below- (Depend on Resistance wire used)
(Measured from -55° C to + 125° C referenced to +30°C)
OperatingTemperature -65° C to 110° C (Suitably derated)
Rev Date : 22/05/2019