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May 12, 2024 — Vishay Intertechnology, a prominent manufacturer of discrete semiconductors and passive components, has announced a significant expansion of its seventh-generation (Gen 7) platform. The company is introducing six new 1200 V FRED Pt Hyperfast rectifiers, now available in compact surface-mount SMPC HV packages. These devices, rated for 1 A, 2 A, and 3 A, are engineered to address the growing need for higher power density and improved efficiency in modern industrial, automotive, and renewable energy systems. This launch underscores the ongoing industry shift towards components that minimize energy loss in high-frequency switching environments.
The new product family, which includes both standard and AEC-Q101 automotive-qualified variants, is designed around a fundamental trade-off in power electronics: reducing switching losses while maintaining low forward voltage drop. Vishay's latest rectifiers achieve this by combining a remarkably low typical reverse recovery charge (Qrr) as low as 105 nC with a forward voltage drop (Vf) down to 1.45 V. This synergy directly translates to less wasted energy during operation, a critical factor for systems like electric vehicle (EV) onboard chargers and industrial motor drives where every percentage point of efficiency matters.
Beyond the core electrical parameters, these rectifiers bring a suite of physical and reliability features to the table. The SMPC HV package offers a substantial creepage distance of 5.4 mm, which is a key safety consideration for high-voltage designs mandated by standards like IEC 60664-1. This robust construction, paired with a low-profile form factor (4.3 mm x 6.5 mm x 1.1 mm), allows designers to meet isolation requirements without sacrificing board space. The devices are footprint-compatible with the common TO-277A package, simplifying upgrades or new designs.
Industry analysts note that the push for faster-switching wide-bandgap semiconductors like Silicon Carbide (SiC) MOSFETs has intensified the need for companion diodes that can keep pace. Vishay's Gen 7 rectifiers, with their 50 ns fast recovery time and minimized junction capacitance, are positioned as an ideal match. "The recovery characteristics are crucial," explains a senior power electronics analyst at a leading research firm. "Slow diodes in a fast-switching circuit can lead to significant voltage overshoot, electromagnetic interference (EMI), and even device failure. Vishay's focus on low Qrr and fast trr directly targets this bottleneck, enabling safer and more efficient use of modern power switches."
This makes the new devices particularly suitable for roles such as clamp, snubber, and freewheeling diodes in flyback power supplies, as well as for bootstrap circuitry and providing desaturation protection for IGBTs and high-voltage MOSFETs. By mitigating switching stresses, they contribute to overall system longevity and reduced thermal management overhead.
The released models are clearly segmented for different current needs:
All devices share a 1200 V blocking voltage and benefit from Vishay's planar structure with platinum doping, a manufacturing technique that enhances reliability and ensures stable performance over the operating temperature range of up to +175 °C. The AEC-Q101 qualified versions are tested for the rigorous demands of automotive applications, opening doors for use in EV traction inverters, DC-DC converters, and battery management systems.
Typical applications extend across several high-growth sectors:
For design engineers, the advantages are multi-faceted. The low recovery current and optimized stored charge minimize ringing and noise, simplifying EMI filter design. The high comparative tracking index (CTI ≥ 600) of the molding compound improves resistance to electrical tracking in humid conditions. Furthermore, the high non-repetitive surge current rating—up to 70 A for the 3 A device—provides a buffer against real-world transient events, enhancing system robustness.
Vishay has stated that samples and production quantities of these new Gen 7 rectifiers are available immediately, with a standard lead time of approximately eight weeks for larger orders. The devices are compliant with RoHS and halogen-free standards and feature a Moisture Sensitivity Level (MSL) of 1 per J-STD-020, indicating no floor life limitations for standard factory handling—a logistical benefit for manufacturing.
This launch reinforces Vishay's strategy of providing targeted solutions that bridge the gap between traditional silicon and emerging wide-bandgap technologies, offering a practical path to higher efficiency without a complete system redesign.
