STMicroelectronics BYW98-200

Overview

BYW98-200 from STMicroelectronics is a high-efficiency fast recovery rectifier diode in DO-201AD package, rated for 200 V repetitive peak reverse voltage, 3 A average forward current at 75°C, and ultra-fast 35 ns reverse recovery time. It delivers low conduction losses (VF max 0.85 V at 3 A, 100°C) and negligible switching losses, making it suitable for high-frequency switching-mode power supplies and transistor base drive circuits.

For engineers reviewing the BYW98-200 datasheet, BYW98-200 pinout, BYW98-200 application, or BYW98-200 equivalent, key selection criteria include its 35 ns trr, 70 A non-repetitive surge rating, DO-201AD thermal resistance (25 °C/W on infinite heatsink), cathode-marked axial lead configuration, and suitability for SMPS output rectification and snubber networks.

Technical Context

This diode employs optimized silicon epitaxial construction to achieve fast minority-carrier recombination, enabling low Qrr (15 nC) and tfr (20 ns) under standardized recovery test conditions (IF = 3 A, dIF/dt = −50 A/µs, VR ≤ 30 V). Its low VF–IF slope and stable trr across temperature (25–100°C) support consistent efficiency in high-duty-cycle converters.

The device operates with maximum junction temperature of 150°C and features UL94-V0 epoxy encapsulation. Thermal resistance is specified as Rth(j–a) = 25 °C/W on infinite heatsink (10 mm leads), and Rth(j–l) drops to ~75 °C/W at ambient - critical for lead-mounted thermal design in compact power stages.

Key Specifications

Pinout & Package

DO-201AD axial-leaded package with cathode indicated by white band; leads are tinned copper, 1.30 mm diameter, 25.4 mm overall length, and 9.5 mm body length. Designed for through-hole mounting and wave soldering (max 230°C for 10 s at 4 mm from case).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH3L06 and ES1J, the BYW98-200 offers optimal balance of 200 V rating, 3 A thermal capability at industry-standard 75°C ambient, and proven axial-lead reliability in high-vibration environments - making it preferred for cost-sensitive, medium-power industrial SMPS.

Availability

BYW98-200 is available at Aetrix Electronics and suitable for switching-mode power supplies, transistor base drive clamps, and snubber networks requiring stable component supply, long-term manufacturability, and consistent parametric performance across production lots.

Supply support for BYW98-200 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, microcontroller, and sensor solutions for automotive, industrial, and consumer markets.

The BYW98-200 belongs to ST's high-efficiency fast recovery diode product line, engineered specifically for high-frequency power conversion where low trr, low Qrr, and robust surge capability are essential - targeting SMPS, UPS, and motor control applications.

FAQ

What is the maximum allowable lead temperature during soldering?

The maximum lead temperature for soldering is 230°C for 10 seconds at a distance of 4 mm from the case. This specification ensures bond integrity and avoids internal die stress or epoxy degradation. Exceeding this limit risks latent failure or reduced surge current capability.

Can BYW98-200 be used in place of a standard 1N4007?

No - the BYW98-200 is not a drop-in replacement for the 1N4007. While both are DO-201AD diodes, the 1N4007 has 1000 V VRRM but slow recovery (>2 µs), whereas the BYW98-200 offers 200 V VRRM and 35 ns trr. Substitution would cause catastrophic failure in high-frequency circuits due to excessive switching loss and potential thermal runaway.

What does the white band indicate on the BYW98-200 package?

The white band marks the cathode terminal, confirming polarity for correct orientation during PCB assembly. This marking aligns with JEDEC DO-201AD standards and is critical for ensuring proper forward conduction and reverse blocking behavior in rectifier and clamp configurations.

Is the BYW98-200 suitable for automotive applications?

The BYW98-200 meets AEC-Q101 stress test requirements per STMicroelectronics' qualification report, and its 150°C maximum junction temperature supports under-hood ambient conditions. However, automotive use requires validation of specific application-level reliability (e.g., ISO 16750 vibration, load dump immunity), which must be confirmed per vehicle platform requirements.