Littelfuse, Inc., today announced the availability of two SIDACtor protection thyristor product families designed to protect equipment in high frequency, high strength or anomalous environments from severe transient overvoltages. The Pxxx0MEL 5kA Series and Pxxx0FNL 3kA Series SIDACtor Protection Thyristors provide more reliable response to multiple high energy surge events. Many high-power protection products that do not use semiconductors experience performance degradation after several surge events. The semiconductor Pxxx0MEL and Pxxx0FNL series are different, and the protection effect can be continuously achieved when multiple surge events occur. There will be performance degradation.
Typical applications for Pxxx0MEL 5kA series and Pxxx0FNL 3kA series SIDACtor protection thyristors include:
CATV amplifier telecommunication base station equipment mobile phone signal tower
UPS/AC high-power distribution network car battery charging system solar power system DC / AC inverter uninterrupted battery backup system
“The on-state voltages of the Pxxx0MEL 5kA series and Pxxx0FNL 3kA series SIDACtor protection thyristors are much lower than those of conventional gas discharge tubes. The low on-state voltage means that higher surge currents can be handled,†said Jack Tung, global product marketing manager at Littelfuse. . "They also provide voltage thresholds well below the metal varistor clamp voltage and can be used in series with clamps such as varistors or TVS diodes to protect the AC input line."
The Pxxx0MEL series and Pxxx0FNL series SIDACtor protection thyristors have the following key advantages:
Clamping performance is superior to traditional MOV passive technology for AC line protection, providing high power surge protection up to 3kA or 5kA.
The low on-state voltage ensures reduced heat buildup during prolonged faults.
Unlike gas discharge tubes (GDT) or surge protectors, this type of semiconductor power device does not wear out, so performance is rarely reduced after multiple surge events, eliminating the need to dispatch service personnel to replace damaged equipment.
Availability
The Pxxx0MEL 5kA Series SIDACtor protection thyristors are available in a TO-218 package and are available in 250-pack tubular packages of 25 tubes each with 10 tubes per cassette. The Pxxx0FNL 3kA Series SIDACtor protection thyristors are available in a TO-262M package and are available in 500-pack tubular packages (50 per tube) or 100-pack trays.
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