NXP Semiconductors BY229X-200,127

Overview

BY229X-200,127 from NXP Semiconductors (formerly Philips) is a glass-passivated fast soft-recovery rectifier diode in SOD113 package, rated for 200 V peak repetitive reverse voltage (VRRM), 8 A average forward current (IF(AV)), and 135 ns maximum reverse recovery time (trr). It features isolated mounting tab, low forward voltage drop (1.85 V at 20 A), and is designed for high-frequency switching in TV receivers and SMPS.

For engineers reviewing the BY229X-200,127 datasheet, BY229X-200,127 pinout, BY229X-200,127 application, or BY229X-200,127 equivalent, key selection criteria include soft-recovery behavior (trr ≤ 135 ns, Qs ≤ 0.7 µC), thermal resistance junction-to-heatsink (Rth j-hs ≤ 4.8 K/W with compound), isolation voltage (2500 V RMS), and SOD113 mechanical compatibility for heatsink-mounted rectification.

Technical Context

The BY229X-200,127 employs double-diffused silicon construction with glass passivation to achieve fast switching and soft reverse recovery-minimizing voltage overshoot and EMI during turn-off. Its soft recovery is characterized by controlled dIR/dt (≤ 60 A/µs) and low reverse recovery charge (Qs ≤ 0.7 µC), critical for reducing snubber losses in high-frequency converters.

Designed for direct heatsink mounting via an electrically isolated tab, it supports stable thermal performance up to 150 °C junction temperature. The SOD113 package provides 2500 V RMS isolation between terminals and heatsink, enabling safe operation in grounded-chassis power supplies without additional insulation.

Key Specifications

Pinout & Package

SOD113 package with electrically isolated mounting tab; 2-pin leaded configuration optimized for vertical heatsink mounting and high-voltage isolation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fast soft-recovery rectifier applications.

Compared with STTH8R06D and VS-8EWH06FNTR-M3, the BY229X-200,127 uniquely combines 200 V rating, 2500 V RMS isolation, and through-hole SOD113 ruggedness-making it optimal for cost-sensitive, high-reliability mains-connected consumer power supplies where mechanical durability and safety compliance are prioritized over ultra-low trr.

Availability

BY229X-200,127 is available at Aetrix Electronics and suitable for TV receiver power supplies, monitor SMPS input rectifiers, and industrial AC-DC adapters requiring stable component supply, long-lifecycle support, and certified isolation performance.

Supply support for BY229X-200,127 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 formed from the spin-off of Philips' semiconductor division, specializing in high-reliability analog, power, and interface solutions for automotive, industrial, and consumer markets.

The BY229X series belongs to NXP's legacy rectifier diode product line, engineered specifically for cost-effective, high-isolation, soft-recovery rectification in mass-market consumer electronics power supplies.

FAQ

What is the maximum junction temperature rating for the BY229X-200,127?

The BY229X-200,127 has a maximum operating junction temperature (Tj) of 150 °C, as specified in the Absolute Maximum Ratings table. This rating enables reliable operation in enclosed power supplies with limited airflow, provided thermal design maintains junction temperature within this limit using the SOD113 package's isolated tab and heatsink interface. Derating curves in the datasheet define allowable IF(AV) at elevated heatsink temperatures.

Does the BY229X-200,127 have an electrically isolated mounting tab?

Yes, the BY229X-200,127 features an electrically isolated mounting tab per the SOD113 mechanical specification, rated for 2500 V RMS isolation between both terminals and the external heatsink. This isolation eliminates the need for mica washers or silicone pads in grounded-chassis designs, simplifying assembly and improving thermal contact in TV and monitor power supplies.

What is the typical reverse recovery charge (Qs) of the BY229X-200,127?

The BY229X-200,127 has a maximum reverse recovery charge (Qs) of 0.7 µC at IF = 2 A, VR > 30 V, and -dIF/dt = 20 A/µs. This low Qs value-combined with its soft recovery profile-reduces snubber losses and EMI generation in high-frequency switch-mode power supplies, directly contributing to improved efficiency and reduced filter component stress in designs using the BY229X-200,127.

Can the BY229X-200,127 be used in place of the BY229F-200 in the same PCB footprint?

No-the BY229X-200,127 uses the SOD113 package, while the BY229F-200 uses the SOD100 package. Though both are 2-pin leaded diodes, their mechanical dimensions differ significantly: SOD113 has longer leads, wider body, and recessed mounting features not present in SOD100. Substituting BY229X-200,127 for BY229F-200 requires PCB pad and heatsink mount redesign.

What is the forward voltage drop of the BY229X-200,127 at 8 A DC?

The BY229X-200,127 exhibits a typical forward voltage drop (VF) of approximately 1.65 V at 8 A and 25 °C junction temperature, based on the "Typical and maximum forward characteristic" curve (Fig.5). At higher temperatures or full-rated 20 A, VF reaches up to 1.85 V. This low VF contributes to reduced conduction losses in high-current rectifier applications such as TV power supplies.