Surface-mount protection thyristors help designers meet global regulations

Designed to protect low-data-rate interfaces and outdoor data interfaces in general industrial applications, a new series of fast-response SIDACtor protection thyristors in DO-214AB (surface-mount) packages, has been introduced by Littelfuse. The Pxxx0S3NLRP Series provides robust surge protection performance at up to 2.5kA, while maintaining much lower switching threshold (VS) and on-state voltage (VT) than traditional protection solutions such as gas discharge tube (GDT) technology. They also offer crowbarring power fault protection superior to typical clamping devices. Applications include protection for general industrial outdoor data interfaces, such as short loop interfaces (<10m) located at base station sites, and low-data-rate interfaces such as RS-232 or RS-423. “Series Pxxx0S3NLRP SIDACtor Protection Thyristors in DO-214AB packages provide a surface-mount solution that allows equipment to comply with global regulatory standards,” said Jeff Chin, product line director for SIDACtor protection thyristors. “They combine stable electrical characteristics with faster response times than GDTs, metal-oxide varistors (MOVs), or TVS Diodes, for more effective circuit protection.”