HV Diode Offers Higher Voltage and Lower Capacitance
Solid State Devices, Inc. has introduced the SDR310 subminiature fast recovery rectifier for high reliability applications. This 3A, 1000-Volt diode has a typical reverse recovery time of 250nsec. The SDR310 offers higher voltage and lower capacitance compared to the 600-Volt 1N5420.
Though the 1N5554 delivers a higher output current of 5A, the SDR310’s reverse recovery is much faster at 400nsec maximum than the 1N5554’s rating of 2µsec maximum. SSDI’s high voltage diodes are currently supplied to various military and other high reliability programs. The SDR310 would also benefit similar applications including electronic warfare, armament, radar, avionics, transformer / power systems, etc.
In addition to the electrical advantages, the SDR310 offers significant weight savings, which can be critical for airborne / flight applications. The SDR310SMS is only 0.3g typical compared to 0.75g typical for the 1N5420US and 1N5554US.
The dimensions of the SDR310SMS measure 0.123 x 0.220 in. maximum, which provides a smaller footprint than the 1N5420US (0.148 x 0.225 inches maximum) and 1N5554US (0.186 x 0.275 inches maximum). The gullwing diode and flat leads packages offer a surface mount option with a lower profile of only 0.120 inches.
The SDR610 utilizes two SDR310 diodes to form a half-bridge rectifier, which can easily be configured as a centertap, doubler or parallel connection. A single device can replace a much larger TO-257 package. Connecting two of these devices – one common cathode and one common anode – in a printed circuit assembly (PCA), makes a powerful but miniature full wave bridge. The void free construction of the SDR610 also eliminates die attach, wire bond, hermeticity, and PIND issues related to TO-25X and stud mount packages.
