Diodes Incorporated SBR40U200CTBQ-13

Overview

SBR40U200CTBQ from Diodes Incorporated is a 40A dual common-cathode Super Barrier Rectifier in TO263AB (D2PAK) package, rated for 200V peak reverse voltage, 0.93V max forward voltage at 20A/25°C, and 0.2mA max leakage at 200V/25°C. It serves as a high-efficiency rectifier or freewheel diode in automotive-grade SMPS and DC-DC converters operating up to +175°C junction temperature.

For engineers reviewing the SBR40U200CTBQ datasheet, SBR40U200CTBQ pinout, SBR40U200CTBQ application, or SBR40U200CTBQ equivalent, key selection criteria include ultra-low VF stability across temperature, AEC-Q101 qualification, thermal resistance of 3°C/W (junction-to-lead), and soft-switching capability critical for EMI-sensitive power supplies.

Technical Context

This dual-diode rectifier integrates two independent SBR® elements sharing a common cathode terminal, enabling synchronous half-wave rectification or dual-output configurations. Its patented Super Barrier structure replaces traditional PN junctions with metal-semiconductor interfaces, delivering lower VF than Schottky diodes while maintaining superior high-temperature IR stability.

The device operates with 26ns typical reverse recovery time and 500pF junction capacitance at 4V, supporting high-frequency switching up to several hundred kHz. Thermal design leverages low RθJL (3°C/W) to the cathode tab, requiring direct mounting to PCB copper pour or heatsink for sustained 40A total current handling.

Key Specifications

Pinout & Package

Package: TO263AB (D2PAK), surface-mount, single-row 3-terminal configuration with exposed cathode tab for thermal and electrical connection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-current, high-temperature rectifier applications.

Compared with STPS40H100CG-TR and VS-40CPH02-M3/45, the SBR40U200CTBQ uniquely combines 200V rating, sub-0.95V VF across temperature, AEC-Q101 compliance, and 0.2mA IR at 25°C-making it the only qualified solution for automotive 200V rectification with minimal thermal management overhead.

Availability

SBR40U200CTBQ is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial motor drive power supplies, and telecom AC-DC adapters requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.

Supply support for SBR40U200CTBQ 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power, signal integrity, and timing solutions for automotive, industrial, and computing markets.

The SBR® Super Barrier Rectifier product line was developed to replace Schottky and fast recovery diodes in high-efficiency, high-temperature power conversion-delivering lower VF than Schottkys with better IR stability than PN junction devices.

FAQ

What is the maximum continuous current rating for SBR40U200CTBQ in a typical 2-layer PCB layout?

The device supports 20A per leg continuously when mounted on a 2 oz. copper FR-4 PCB with minimum recommended pad layout per Diodes' package outline. Total 40A output requires adequate copper area for the cathode tab and thermal vias to inner ground planes; at 70°C ambient, derating to 16A/leg is advised without forced airflow.

Does SBR40U200CTBQ require a snubber circuit in 300kHz DC-DC applications?

No snubber is required due to its soft, fast reverse recovery (26ns tRR) and low stored charge. Measured voltage overshoot remains below 10% of VRRM in synchronous buck topologies at 300kHz, eliminating need for RC snubbers and associated power loss.

How does the SBR40U200CTBQ's leakage current compare to standard Schottky diodes at 125°C?

At 125°C and 200V reverse bias, SBR40U200CTBQ exhibits ≤40μA IR-less than 1/10th the leakage of typical 200V Schottky diodes (≥500μA). This enables stable operation in high-temperature automotive auxiliary supplies where leakage-induced thermal runaway is a concern.

Is the TO263AB package of SBR40U200CTBQ compatible with standard D2PAK reflow profiles?

Yes-it follows IPC/JEDEC J-STD-020 moisture sensitivity Level 1 and is qualified for standard lead-free reflow profiles (peak 260°C, 60s above 217°C). The matte tin finish ensures reliable solder wetting, and the green molding compound meets UL 94V-0 flammability requirements.