Minimize Reference Resistor Sourcing Risk with Automated Resistor Cross-Reference Tools

How does the new resistor cross-reference tool from Sourcingbot help to make my BOM more robust? In order to safely manage risk in electronic component sourcing, good market analysis is required. SourcingBot generates cross references for your bill of materials automatically. Resistors are commodity parts with many suppliers. How can you tell which supplier is best and find a compatible resistor reference? SourcingBot is here to help.

Reference Resistors in Modern Electronics Design

Resistors are simple two-terminal passive components. They are mainly used for limiting current, dividing voltages and implementing timing applications. In modern electronic applications I design with dozens or hundreds of different resistors in a single board design. I have to pick and choose from a vast array of types and over 50 manufacturers. In some designs I can use a standard, well-known reference resistor - in others, special resistors are required. This makes BOM robustness more difficult and it costs more time to find a resistor reference from 2nd or 3rd sources. Lists from past designs, Excel sheets, in-house databases or simple 2nd source tools can be useful, but those solutions break when a new resistor or resistor type is used which is not listed yet. Finding a resistor reference which meets all of the original requirements, such as reference resistance, power rating, tolerance, and size, can be quite difficult.

Compatible Cross-References with the SourcingBot Reference Tool

At this moment Sourcingbot stepped in and helped me with their new and recently rolled-out resistor cross-reference tool. So far they offer 2 usage options. First, a quick and simple solution, and second, a more advanced tool for different usage/perspective cases. In both cases, I simply input my reference resistor part number into the tool. The simple version gives me the top five resistor references in a simple table and I can see the main parameters and their difference to the reference resistor in a single view. The actual product match is shown with a simple score, the matching score. Filters are pre-adjusted to give me the best balance between the number of similar/exact product matches and a reasonable number of matches to choose from. The SourcingBot resistor cross-reference tool compares products across a range of parameters to find the most compatible replacements for your reference resistor. Just as a simple cross-reference PDF from TDK or Vishay may compare reference resistance value and size across a few series, electrical parameters such as reference resistance, power rating, and resistance tolerance are compared across all parts from all manufacturers in the SourcingBot tool. To check footprint compatibility, case code is used for SMD parts, while diameter and length are used for THT parts. If I need more technical options, Sourcingbot also offers an expert mode. I can adjust the cross-reference search for more application specific requirements like exact footprint match to my reference resistor, tighter tolerance, smaller footprint or even automotive requirements. All of this help is available on their website and via API. Their service is free-of-charge, easy to use and helps me to save a lot of research time to make my BOM designs robust.
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