NXP Semiconductors BYW29E-100,127

Overview

BYW29E-100,127 from NXP Semiconductors is an ultrafast epitaxial rectifier diode in TO-220AC (SOD59) package, rated for 100 V peak repetitive reverse voltage (VRRM), 8 A average forward current (IF(AV)), and 25 ns reverse recovery time (trr). It delivers low forward voltage drop (VF ≤ 0.895 V at 8 A/150 °C) and soft recovery for high-frequency switched-mode power supply output rectification.

For engineers reviewing the BYW29E-100,127 datasheet, BYW29E-100,127 pinout, BYW29E-100,127 application, or BYW29E-100,127 equivalent, key selection criteria include its rugged thermal cycling performance, 2.7 K/W junction-to-mounting-base thermal resistance, ESD tolerance up to 8 kV (HBM), and suitability for high-efficiency AC/DC adapters and server PSUs where fast switching and low conduction loss are critical.

Technical Context

The BYW29E-100,127 employs an epitaxial silicon structure optimized for ultrafast recovery with soft reverse recovery characteristics-evidenced by trr1 ≤ 25 ns and Qrr ≤ 11 nC-minimizing switching noise and EMI in high-frequency converters. Its rugged construction supports non-repetitive peak forward current (IFSM) up to 80 A (10 ms) and peak reverse surge current (IRSM) of 0.2 A.

Thermally, it features a low Rth j-mb of 2.7 K/W when mounted to a heatsink, enabling reliable operation at Tj = 150 °C with Tmb ≤ 128 °C. Reverse leakage remains tightly controlled: IR ≤ 10 μA at VRWM and ≤ 0.6 mA at 100 °C, supporting stable performance across industrial temperature ranges.

Key Specifications

Pinout & Package

Package: TO-220AC (SOD59), plastic single-ended, heatsink-mounted, 2-lead, with mounting tab electrically connected to cathode (Pin 1). Net mass: 2 g. Mounting base serves as thermal path and electrical connection point.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrafast rectifier applications.

Compared with STTH8R06D and MUR8100CT, the BYW29E-100,127 delivers superior efficiency at 100 V due to its 0.895 V VF and 25 ns trr, while its monolithic TO-220AC package with cathode-tab mounting provides lower thermal resistance and higher surge robustness-critical for compact, high-power-density SMPS.

Availability

BYW29E-100,127 is available at Aetrix Electronics and suitable for AC/DC adapters, server power supplies, industrial motor drive auxiliary supplies, and telecom rectifier modules requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for BYW29E-100,127 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in high-performance analog, logic, and power discrete solutions for industrial, automotive, and consumer markets.

The BYW29E series belongs to NXP's rugged ultrafast rectifier product line, engineered specifically for high-frequency switched-mode power supply output stages where low VF, soft recovery, and thermal resilience are essential for efficiency and reliability.

FAQ

What is the maximum junction temperature rating for the BYW29E-100,127?

The BYW29E-100,127 has a maximum operating junction temperature (Tj) of 150 °C, as specified in the Absolute Maximum Ratings table. This rating is maintained under conditions where mounting base temperature (Tmb) does not exceed 128 °C, ensuring long-term reliability in thermally demanding applications such as server PSUs and industrial power supplies. The BYW29E-100,127 achieves this with a low Rth j-mb of 2.7 K/W.

Is the mounting tab of the BYW29E-100,127 electrically isolated?

No, the mounting tab of the BYW29E-100,127 is electrically connected to Pin 1 (cathode), as confirmed in the Pinning diagram and Mechanical Data section. This configuration requires electrical isolation from the heatsink or chassis unless the cathode node is referenced to system ground. Insulating hardware or mica washers must be used when mounting to conductive surfaces. The BYW29E-100,127's tab-cathode linkage is integral to its thermal and electrical design.

What is the reverse recovery time (trr) specification for the BYW29E-100,127 under standard test conditions?

The BYW29E-100,127 specifies trr1 ≤ 25 ns at IF = 1 A, VR ≥ 30 V, and −dIF/dt = 100 A/μs, per the Electrical Characteristics table. A second recovery metric, trr2 ≤ 20 ns, is defined for IF = 0.5 A to IR = 1 A with Irec = 0.25 A. These values confirm the BYW29E-100,127's ultrafast classification and suitability for >100 kHz switching topologies where fast, soft recovery is required.

Does the BYW29E-100,127 meet any industry-standard ESD ratings?

Yes, the BYW29E-100,127 is rated for 8 kV electrostatic discharge (ESD) per the Human Body Model (HBM), with C = 250 pF and R = 1.5 kΩ, as stated in the ESD Limiting Value table. This level of ESD robustness exceeds typical JEDEC Class 2 requirements and supports reliable handling during PCB assembly and field service. The BYW29E-100,127's ESD rating contributes to its ruggedness in manufacturing and end-use environments.

How does the forward voltage (VF) of the BYW29E-100,127 vary with temperature and current?

The BYW29E-100,127 exhibits VF = 0.8–0.895 V at IF = 8 A and Tj = 150 °C, rising to 0.92–1.05 V at 25 °C, and reaching 1.1–1.3 V at IF = 20 A. This positive temperature coefficient and current-dependent behavior is typical of silicon epitaxial diodes. Designers should use the 0.895 V max value at elevated temperature for worst-case thermal analysis. The BYW29E-100,127's low VF profile directly improves system efficiency, especially under high-load, high-temperature conditions.