LRA350-009 Datasheet, PDF (1/3 Pages) Token Electronics Industry Co., Ltd. – LRA Low Ohmic Open Air Resistors

TOKEN
LRA Low Ohmic Open Air Resistors
Low Ohmic
Open Air Resistors
Low Ohmic Open Air (LRA) Resistors
Feature Longer Thermal Path
Preview
Token’s current sense LRA open air resistors are expected to
gain wide acceptance in the worldwide market as a result of
increased thermal management capabilities.
The LRA Series is designed for applications requiring the
transfer of heat away from circuits and solder joints. Available in 0.5W, 1W, and 1.5W rating, the resistor is being
specified for current sensing, feedback, current detective,
supper low inductance, as well as surge and pulse applications.
The hot spot on the LRA resistor is approximately 0.2 degrees
higher than on a typical metal strip chip resistor. This results
in an increased thermal path for the LRA, reducing heat
transfer into the solder joints and circuits.
The flameproof LRA Series resistors are constructed of a wire resistive element with welded copper leads
to prevent solder wicking, which can change the device’s resistance value in the circuit by as much as 30%.
Because of this, the device is ideal for thermally harsh environments, including automotive and aerospace
applications, as well as enclosed, poorly ventilated circuits in applications such as laptop computers.
The LRA Open Air Series feature a reduced pitch, or spacing between the leads on the circuit board (with a
corresponding increase in the board mounted profile), when compared to the standard Token LRB Series devices.
The LRA resistors are rated for 1W or 1.5W at 70°C, with resistance values from 0.1Ω to 0.003Ω and tolerances
down to ±1%. Operating temperature range is -50°C to 300°C. The LRA Series is available in bulk packaging in
200 increments.
Token will also produce devices outside these specifications to meet customer requirements. A lead-free RoHS-
compliant version is available, as is a non-inductive version for high frequency applications. Contact us with
your specific needs.
Features
- Radial leads.
- Non-inductance.
- Solderable Copper Leads.
- Lead (Pb)-free and RoHS compliant.
- ±1%, ±3%, ±5%, ±10% standard tolerance.
- High stability bare metal element open air style.
Applications
- High power AC/DC detection.
- Automotive, Feedback System.
- Residual Battery Power Detection.
- Inverter and Switching Power Supplies
- CPU Drive Control, Power Tool Motor controls.
- Power Supply Shunt, Current Detective, and
Current Sensing.
Version 2010
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