STMicroelectronics BYT30G-400

Overview

BYT30G-400 from STMicroelectronics is a high-efficiency fast recovery diode in D2PAK package, rated for 30 A average forward current (Tc=100°C), 400 V repetitive peak reverse voltage, and 50 ns reverse recovery time at 25°C with IF=0.5 A, used in high-frequency inverters and freewheeling circuits for motor control.

For engineers reviewing the BYT30G-400 datasheet, BYT30G-400 pinout, BYT30G-400 application, or BYT30G-400 equivalent, key selection criteria include trr ≤ 50 ns at 25°C, VF = 1.4 V at 30 A/100°C, Rth(j-c) = 1 °C/W, IFSM = 350 A (10 ms), and D2PAK thermal performance for SMD power rectification.

Technical Context

This diode employs optimized silicon epitaxial construction to achieve low noise turn-off switching and very low switching losses, enabling operation in hard-switched SMPS and IGBT freewheeling paths where dIF/dt up to –240 A/µs is encountered.

Its recovery behavior is characterized by tIRM = 50 ns and IRM = 12 A under VCC = 200 V, dIF/dt = –240 A/µs, Lp < 0.05 µH, and C factor = 3.3 for turn-off overvoltage prediction in snubberless designs.

Key Specifications

Pinout & Package

D2PAK (TO-263) surface-mount plastic package with isolated tab; thermally enhanced for PCB copper area mounting; 3-pin configuration with cathode (pin 1), anode (pin 2), and exposed drain pad (pin 3, electrically connected to cathode).

Key Features

Applications

Availability

BYT30G-400 is available at Aetrix Electronics and suitable for high-frequency inverters, motor control freewheeling circuits, and 400 V DC polarity protection applications requiring stable component supply and long-lifecycle support.

Supply support for BYT30G-400 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.

The BYT30G-400 belongs to ST's high-voltage fast recovery diode product line, engineered specifically for high-efficiency, high-dI/dt power conversion in motor drives and renewable energy inverters.

FAQ

What is the maximum junction temperature for continuous operation?

The BYT30G-400 has a specified junction temperature range of –40°C to +150°C. For continuous IF(AV) = 30 A operation, Tj must be maintained ≤150°C using appropriate PCB copper area and ambient cooling; derating applies above Tc = 100°C per Fig.6.

How does the C factor affect circuit design?

The C factor of 3.3 quantifies the diode's turn-off overvoltage sensitivity: Voff ≈ C × Lp × |dIF/dt|. With measured Lp < 0.05 µH and dIF/dt = –240 A/µs, Voff remains below 40 V-enabling reliable IGBT clamping without external snubbers in well-layout-controlled designs.

Is the D2PAK exposed pad electrically isolated?

No-the D2PAK exposed pad of the BYT30G-400 is internally connected to the cathode (Pin 1). It must be routed to the cathode net on the PCB and cannot serve as a floating thermal pad; isolation would violate internal construction and degrade thermal performance.

Can this diode replace BYT30G-600 in a 400 V design?

Yes-BYT30G-400 is a direct replacement where 400 V VRRM suffices; it offers identical package, pinout, and thermal specs but lower VRRM than the 600 V variant. However, its trr = 50 ns is slightly faster than BYT30G-600's typical 60 ns, improving switching efficiency at the cost of reduced reverse margin.