BKW
ISA-WELD® - SMD Precision Resistors
TECHNICAL DATA
Resistance values
0.2*, 0.3, 0.4, 0.5 mOhm
Tolerance
5%
Temperature coefficient
< 20 ppm/K (20 °C - 60 °C)
Applicable temperature range
-55 °C to +140 °C
Load capacity
3W
Internal heat resistance (Rthi)
< 10 K/W
Inductance
< 3 nH
Stability (Nominal load) deviation TK= Terminal temperature
< 0.5 % after 2000 h (T = 110 °C)
* resistance material Zeranin
K
®
features
•
Independent from temperature because of lowest
TCR-values
•
Extremely good long term stability, thus the energy
meters do not require any recalibration
•
Permanent current up to 100 A (0.3 mOhm)
•
Qualified for 20 A-, 40 A-, 60 A- and 80 A-energy-meters
•
Massive copper terminals
•
Very high reproducebility of R-value and TCR
•
Mounting: Screwed on terminals of kWh-meter
application
•
Ideal for single and three phase energy meters
Battery current sensing in automobile and electric
vehicles
Current data sheets are available in PDF formats at our web site e-mail: tekinfo@isotekcorp.com - Internet: www.isotekcorp.com
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BKW
TCR, power derating and long term stability
Temperature dependence of the electrical resistance of
manganin®-resistors
Limiting curve
Typical temperature dependence of a BKW resistor
temperature in °C
Power derating curve
Stability < 0.5 %
terminal temperature TK [°C]
resistance change in %
Typical long term stability of manganin®-resistors at 140 °C
time in h
Current data sheets are available in PDF formats at our web site e-mail: tekinfo@isotekcorp.com - Internet: www.isotekcorp.com
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BKW
Connection diagram:
Connection diagram for sense leads
Sense terminal connection on pc-board (bottom view)
Proposal for pcb-layout (Reflow-soldering)
Recommended solder profile
Reflow, IR-soldering, wave soldering upon request
Temperature [°C] 260
255
217
Time [s]
40
90
Peak
RoHS 2002/95/EC compliance since product launch.
For more information please visit our website:
www.isabellenhuette.de
ordering code
BKW-M-R0003-5.0
Type Material
Resistance value Tolerance
BKW MANGANIN® 0.3 mOhm
5.0 %
Sense terminal connection on pc-board (bottom view)
PACKAGING INFORMATION
500 pcs in plastic bags sealed and filled with dry
nitrogen
Current data sheets are available in PDF formats at our web site e-mail: tekinfo@isotekcorp.com - Internet: www.isotekcorp.com
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BKW
Maximum pulse energy respectively pulse power for continuous operation
This curve is only valid for the resistance value R005. The progression of the curve in the lower range could be different for other resistance values.
Therefore a separate qualification should be made in thresholds.
Warranty
All information regarding the suitability, workability and applicability of our products, all technical advice and other information are provided to the
best of our knowledge and belief, but shall not discharge the buyer from his own examinations and tests.
Current data sheets are available in PDF formats at our web site e-mail: tekinfo@isotekcorp.com - Internet: www.isotekcorp.com
Isotek Corporation a subsidiary of Isabellenhütte
1199 G. A. R. Highway - Swansea, MA 02777, USA - Phone 508 673 2900 - Fax: 508 676 0885
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