High-temperature switching thyristors have high surge capability

Combining blocking voltages up to 600V with current ratings to 40A, the SJ series have been added to the high temperature SCR thyristors by Littelfuse.

The SJ series high-temperature SCR (silicon-controlled rectifier) switching thyristors offer circuit designers blocking voltages (VDRM) up to 600V and current ratings from 4.0A to 40A to support a range of applications. Littelfuse believes that offering designers a wider operating margin than earlier SCRs, makes it possible to tolerate insufficient cooling and higher inrush currents at start-up.

Typical applications for SJ Series include rectifier and battery voltage regulators for AC generators in motorcycles, capacitor discharge ignition (CDI) in motorcycles, in-rush current limiters for bulk capacitors in AC/DC systems such as LED lighting and battery chargers, line AC rectifier bridges for LED lighting systems, DC motor controls and battery chargers and soft starters for AC motors.

The SJ series SCR switching thyristors’ high junction temperature of 150°C ensures a wider operating margin, allowing devices in compact packages to provide performance comparable with those in larger packages, claims Littelfuse. Designers can therefore achieve higher performance by replacing existing SCRs with new ones with the same package size or they can reduce product size by using SCRs in the more compact packages.

the robust clip-attach package design enables high surge capability, so SCRs can tolerate high inrush currents and harsher operating conditions for a longer field life.

SJ series SCR switching thyristors are available in various package styles, including TO-251AA, TO‑252AA (D-PAK), TO-220 Isolated, TO-220AB non-isolated and TO-263 (D2-PAK). Minimum order quantities for products packed in tubes range from 500 to 750. They are also available in embossed carriers, with minimum order quantities of 2,500 (D-PAK) or 500 (D2-PAK). Sample requests may be placed through authorised Littelfuse distributors worldwide.

Founded in 1927, Littelfuse provides circuit protection, power control and sensor technologies. The company serves customers in the electronics, automotive and industrial markets with products that include fuses, semiconductors, polymers, ceramics, relays and sensors. Littelfuse has more than 11,000 employees in more than 50 locations worldwide.


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