Product Overview
The OMS257SAIRAIDA, OMS259SAIRAIDA, OMS258SAIRAIDA, OMS26OSAIRAIDA series are high efficiency, center-tap rectifiers offered in a hermetic, JEDEC TO-254AA metal package. Designed for power switching applications over 100 kHz, this series is capable of handling a 40 Amp current and offers a peak inverse voltage range from 50 to 200 Volts, with an ultra-fast reverse recovery time of only 50 ns trr.
Key Features
The rectifiers boast several key features, including a very low forward voltage and very fast switching time, which make them suitable for high-reliability and space-constrained applications. The hermetically sealed package ensures durability, while the low thermal resistance and isolated package promote better heat dissipation. Additionally, high surge capability is enhanced with the option for ceramic feedthroughs. Devices are available screened to MIL-S-19500 standards, including TX, TXV, and S levels for enhanced reliability.
Absolute Maximum Ratings
The datasheet specifies the maximum ratings for each diode in the series, including a peak inverse voltage from 50 to 200 V, a maximum average D.C. output current at 100°C of 20 A, and a surge current (non-repetitive, 8.3 msec) of 500 A. The thermal resistance from junction-to-case is 1.3°C/W, and the devices can operate within a temperature range of -55°C to +150°C.
Electrical Characteristics
The datasheet details the electrical characteristics for each part number, provided at junction temperature (Tj) of 25°C unless specified otherwise. For instance, at 100°C, the forward voltage drops to as low as 1.0 V while maintaining a maximum reverse current of 20 mA for the OMS5257XX part, with similar figures adjusted for the other variants in the series. Moreover, these characteristics include pulse test conditions with a favored duty cycle and timing for testing in a high-frequency circuit environment.
Mechanical Outline and Ordering Information
The datasheet provides detailed mechanical dimensions for the TO-254AA package and notes the availability of a Z-Tab package alternative. Additional ordering information, specific to customizations like glass or ceramic feedthroughs, is available by tweaking the part number as indicated. Omnirelk’s contact information, including address and fax, supports further inquiries and order placements.
Schematic and Standard Product Availability
A schematic demonstrates the standard common cathode arrangement, with notes on how to obtain common anode or doubler configurations. It also points out that standard products come with glass feedthroughs, and those requiring ceramic feedthroughs can adjust the part number accordingly.
References:
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