Resistor range enhances surge and pulse capability across the board
Surge energy ratings for the new wirewound WHS series are the industry’s highest from 2W to 7W, 1 to 330 Ohms
Weybridge, UK, 21 January 2013: TT electronics has introduced a comprehensive range of wirewound resistors offering the industry’s highest surge energy ratings from 2W to 7W sizes. Suitable for a wide range of pulse applications, the WHS series flameproof resistor is aimed, particularly, at designers of power supplies requiring a line input resistor for inrush limiting and protection.
Optimised surge performance derives from the special winding design of these resistors, in which a high-purity ceramic substrate is assembled with interference fit end-caps welded to the terminations. The resistive element is then wound on the substrate and welded to the caps. Its ability to withstand the high surge conditions associated with switch-on, discharge or external surge events results in improved reliability, savings in PCB space and reduced need for additional components.
The WHS2, rated at 2W, is the smallest resistor of its type on the market and provides surge energy ratings of 0.9 to 5.8J. Models are available rated 3, 5 and 7W, in resistance values up to 330 Ohms and taking energy ratings up to 60J. With a 10W model under development, the WHS family will offer better performance than competitors over a wider span of power and resistance. Moreover, designers have greater flexibility with the additional options of radial, goalpost, lancet and SMD Z-form leads.
All the new resistors benefit from UL94-V0 flameproof protection and operate over a wide -55o to +155°C temperature range. Delivered in tape-and-reel format as standard, they are RoHS compliant with lead-free terminations.
The full range of WHS resistors is available globally from TT electronics’ distribution channel partners:
For further information and data sheet downloads please visit: http://www.welwyn-tt.com/pdf/datasheet/WHS.pdf
or contact the TT electronics European Sales Office at ,
View the wider TT electronics portfolio at the Technology Showcase: http://technology.ttelectronics.com/
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About TT electronics PLC
TT electronics plc is a focused, global electronics group supplying leading manufacturers in the defence, aerospace, medical, transportation, energy and industrial markets. The Group consists of three divisions: Components, Sensors and Integrated Manufacturing Services, each delivering technology, products and services to customers in target markets worldwide. TT electronics plc operates from headquarters based in Weybridge, Surrey, with more than 20 global manufacturing locations and more than 3,000 employees worldwide.
Additional information is available from our corporate website:
Liz Blair, Marketing Manager, TT electronics plc, Welwyn Electronics Park, Bedlington, Northumberland, NE22 7AA UK.
Tel: +44 (0) 1670 536749
Tel: +44(0)1622 210080