Dallas, Tex. Diodes Inc. has introduced several 300-V Super Barrier Rectifiers (SBR) rectifiers that surpass the industry-wide Schottky reverse voltage limitation of 250 V. The devices include the SBR60A300CT (60 A), SBR20A300CT (20 A) and SBR40U300CT (40 A).
The 300-V SBR rectifiers combine both the Schottky-like low forward voltage drop (VF) with the thermal stability of a fast recovery rectifier. When compared to traditional 300-V ultra-fast recovery rectifiers, the 300-V SBRs are said to offer a 20 to 25% improvement in VF with similar soft, reverse recovery switching speed (TRR). This increased performance results in higher efficiency when used as output rectifiers or boost diodes in switch-mode power supplies in high power applications such as plasma/LCD monitors, industrial applications such as industrial computers and welding equipment, telecommunications and medical power supplies.
The SBR60A300CT SBR device offers a maximum forward output current of 60 A with a 300-V reverse blocking voltage in a TO-220 package. The 300-V rating at 60A is 76% higher than other traditional Schottky rectifier offered at the same current rating, according to Diodes. With the higher voltage rating and avalanche energy capability combined with a low forward voltage drop, designers can improve their rectification efficiency and simplify their design by removing snubber circuits that suppress high reverse avalanche spikes, said the company.
The SBR20A300CT device provides a continuous forward current rating of 20 A and low forward voltage drop, and for higher power applications, the SBR40U300CT offers a continuous forward current of 40 A. All rectifiers are rated for a high maximum junction temperature of 175°C making them suitable for applications such as industrial computers, telecommunications and medical SMPS.
Product information: SBR rectifiers (200 to 300 V)
Diodes Inc., 1-805-446-4800, www.diodes.com