World's first claim for 5W surface-mount resistor

TT Electronics has launched the industry's first surface-mount power resistor capable of 5W continuous dissipation.

TT Electronics has launched the industry's first surface-mount power resistor capable of 5W continuous dissipation.

The robust cement-coated wire-wound WA85Z resistor makes use of a novel SMD lead forming technique, pioneered by TT Electronics, to convert axial power resistors into an SMD format.

The 5W component is a new addition to the WA80Z Series family of resistors which is already available in 2 and 3W ratings (at 25C), with values from 10mohm to 6.8kohm and tolerances to 1%.

Meeting the automotive temperature range of -55 to +155C, the WA80Z Series can be customised for specific fusing or pulse handling characteristics.

Aimed at replacing expensive moulded parts and traditional through-hole devices, the WA80Z is supplied in blister tape and is compatible with vacuum pick and place systems.

Devices have the ability to fuse safely under fault conditions and have an inherently nonflammable construction which does not use toxic flame retardants; in addition, unlike some high-power SMT resistors, they do not rely on the PCB tracks to provide a heatsink.

John Graham, Marketing and Sales Director, Welwyn Components emphasises: "This SMD format allows engineers to translate their designs quickly and effectively to surface mount, without the need to select two surface-mount resistors to replace a single 5W axial resistor".

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