What are the major design considerations for using resistors?
• Circuit minimum and maximum operational characteristics i.e. Power, voltage, current, other component values, duration of pulses (if any) and frequency. • Environment into which the parts are to be fitted. Temperature, humidity, mounting type and relation to other heat sensitive/generating parts. • Short term / long term requirement in terms of electrical performance. Stability / life etc. • Design criteria, safety specifications and the level to which the part should be approval tested. • Cost band of resistor versus other alternatives if there are any. • Connection and terminal configuration. A decision made against each of the above questions will reduce the available product list until the most suitable is left. Unfortunately, a recommendation often has to be made balancing a number of undesirable parameters. This is where good product knowledge will enable the best practical decision for the Customer. To specification and budget.
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