Can you help me to understand the definitions of technical terms used on your datasheets?
Yes, please look at Definitions of Technical Terms. If you need further help, please send a Technical Enquiry.
How do I find a resistor datasheet?
Enter the series or type in the Product Data Search box and click on the related PDF icon.
How do I read the colour code / color code on a resistor?
The resistor colour code / color code description may be found here.
How do I read the EIA-96 value code (2 digits & 1 letter) on a small chip resistor?
The EIA-96 value codes are listed here.
What products are available in SnPb / leaded / pure tin free terminations?
Products with SnPb terminations are listed here.
What standard resistance values are available?
Consult the Electrical Data part of the product datasheet. In most cases this will specify the standard value series, often E24 or E96. This refers to EIA standard resistor values listed here. Low ohmic value products are often additionally available in integer values up to 10 milliohms and in multiples of 5 milliohms. Some products are available only at a limited set of values listed on the datasheet.
What is an infallible resistor?
An infallible resistor, within the field of Intrinsically Safe (IS) design, is defined as one for which a short circuit failure mode is considered impossible, and therefore need not be simulated during analysis or testing. It is used for the function of limiting the current which may pass through barriers designed to restrict energy transfer between parts of an IS system. As it is a potential dissipator of heat, it is generally derated by at least 50% in order to limit maximum surface temperature. When the level of protection requires the resistors to be doubled or tripled, they are connected in series.
The technology preferred for this is wirewound, since this is essentially like a conventional wire link fuse, albeit with the wire wound around an insulated rod. For such a part the failure modes may be parametric (+/- a few percent ohmic value change) or open circuit.
An example of a products series which may be suitable for this is ULW.