Fusible Resistors For High-density Industrial & Consumer PSUs


TT Electronics has launched a new range of fusible wirewound resistors which combine the functions of a fuse and a line input resistor in a single, vertical radial formed component to save valuable PCB space. Designed for industrial and consumer sectors, the resistors can be deployed in power supplies, white goods controllers, circuit breakers, line input circuits, protection circuits and other applications.

The new ULWP2R range consists of UL recognised, 2W rated power resistors and are aimed at designers of high-density PSU circuits where PCB space is at a premium, fusing must be provided, and where automatic insertion is a requirement.

Factors driving the demand for this type of component are cost reduction re-designs that are increasing both the popularity of dual function components and the automated insertion of parts that cannot be switched to SMD. Further, the increasing electronic content in electrical products is putting pressure on the space available for PSU sections.

UL1412 recognition makes the new resistors easier for customers to get UL approval and provides third party assurance of a safety critical part.


The resistor’s radial, vertical format saves PCB space and also stops surrounding components and the PCB overheating, reducing field failure costs, according to the firm.

The inrush and surge withstanding resistors provide failsafe mains fusing at 120/240Vrms and they feature a UL94-V0 flameproof coating. Supplied in tape and reel packaging they are ideal for minimal footprint designs that require flameproof components for automated through-hole assembly, simultaneously reducing assembly costs.

The ULWP2R range of fusible wirewound resistors enables designers to build compact and affordable fire prevention into their products.

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For more information, view the full Press release.



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