PCB terminals operate in higher ambient temperatures

Electronic and mechatronic devices are becoming ever smaller and more complex. This trend leads to an extremely high assembly density of the integrated PCBs and the correspondingly high operating temperatures. PCB terminals made from the highly heat-resistant insulating material WEMID help to meet the demands for suitable higher-performance components.

WEMID is a halogen- and phosphor-free special thermoplastic from Weidmller that displays an enhanced continuous operating temperature of 120degC (in comparison, PA 66 is rated for 100degC) and improved fire resistance characteristics. The flammability class is VO (PA 66: V2) in accordance with UL 94. Products with an increased continuous operating temperature have the following advantages for users: on the one hand, customers can utilise the PCB terminals with the same load current in devices operating in a higher ambient temperature (+20degC). Or put another way, the same physical size of PCB terminal offers a greater power spectrum and more safety. When seen from the perspective of product liability, the safety aspect takes on particular significance. On the other hand, with constant ambient temperatures the user can utilise the PCB terminals with higher currents. That means in practical applications that smaller and more economic PCB terminals can be used for the same power spectrum. That means more compact electronics modules and in turn more compact devices can be realised. The new PCB terminals made of WEMID fulfil the specifications contained in the RoHS Directive. WEMID is also qualified for use in railway applications in accordance with NF F 16-101 specifications.

Design freedom

It does not matter which family of PCB terminals users wish to utilise, as design freedom is maintained. This is supported by the standard colours - orange, grey, green and black - as well as the conventional pole numbers. Equipment can be marked on-site for identification using strips of terminal markers or supplied ex-works with markings printed on them directly. PCB terminal families equipped with a pressure clamp or clamping yoke connection are fitted with a 'plus/minus' screw as standard for reliable operation and transmission of the required torque. Conventional flat-bladed or Pozidrive Z cross-headed screwdrivers can be used for screw connections with a "plus/minus' screw. That means that "plus/minus' screws also allow power-operated screwdrivers to centre more easily.

With its new PCB terminals made of WEMID, Weidmller is offering its customers a programme of products that is distinguished by its suitability for a wide spectrum of applications and exceptional versatility. Weidmller's palette of products will be gradually converted to use WEMID.