Diodes Incorporated SBG2035CT-T-F

Overview

SBG2035CT-T-F from Diodes Incorporated is a 35V, 20A dual common-cathode surface-mount Schottky barrier rectifier in D²PAK (TO-263) package, featuring 0.55V forward voltage at 10A per element, 225A non-repetitive surge rating, and 2.0°C/W junction-to-case thermal resistance-designed for low-voltage, high-frequency DC/DC converters and reverse polarity protection in industrial power supplies.

For engineers reviewing the SBG2035CT-T-F datasheet, SBG2035CT-T-F pinout, SBG2035CT-T-F application, or SBG2035CT-T-F equivalent, key selection criteria include its 35V blocking voltage, dual common-cathode configuration, thermal performance under 105°C case temperature, RoHS-compliant tin finish, and compatibility with automated SMT assembly on heatsinked PCBs.

Technical Context

This dual-element Schottky rectifier integrates two independent anode terminals sharing a single cathode terminal, enabling synchronous rectification or dual-output DC/DC topologies. Its guard ring die construction provides transient overvoltage immunity without external clamping components.

Rated for 20A average output current at TC = 105°C with derating to zero at 150°C, it delivers low conduction loss (0.55V @ 10A) and fast switching (no minority-carrier storage), making it suitable for high-efficiency 100–500kHz switching applications where reverse recovery time is critical.

Key Specifications

Pinout & Package

Package: D²PAK (TO-263), surface-mount, single-side heat dissipation, UL 94V-0 molded plastic body, 1.7g mass, moisture sensitivity level 1.

Key Features

Applications

Availability

SBG2035CT-T-F is available at Aetrix Electronics and suitable for industrial power supplies, telecom DC/DC modules, and automotive auxiliary power systems requiring stable component supply and long-term manufacturability assurance.

Supply support for SBG2035CT-T-F 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 management, signal integrity, and protection solutions for industrial and consumer markets.

The SBG20xxCT series belongs to Diodes' high-current Schottky rectifier product line, engineered specifically for high-efficiency, thermally constrained AC/DC and DC/DC conversion in space-limited power designs.

FAQ

Is SBG2035CT-T-F pin-compatible with SBG2040CT-T-F?

No. While both share identical D²PAK package and pinout (Pin 1: Anode 1, Pin 2&4: Common Cathode, Pin 3: Anode 2), SBG2040CT-T-F has 40V VRRM versus 35V for SBG2035CT-T-F. Substitution requires verification that system transient margins remain sufficient at the higher blocking voltage.

What is the maximum allowable case temperature for continuous 20A operation?

The datasheet specifies 20A average output current only at TC = 105°C. Operation above this temperature requires linear derating per Figure 1: at TC = 125°C, max current drops to ~14A; at TC = 150°C, rated current falls to zero. Thermal design must maintain case temperature ≤105°C under worst-case ambient and airflow conditions.

Does SBG2035CT-T-F require a heatsink for 20A operation?

Yes. With RθJC = 2.0°C/W and 5.5W typical power dissipation per element at 10A, junction temperature rise exceeds safe limits without thermal management. A minimum 25 cm² copper pour (2 oz) or bolted heatsink is required to sustain 20A average current at TC = 105°C.

Can SBG2035CT-T-F be used in automotive under-hood applications?

It meets the -65°C to +150°C operating temperature range required for many under-hood locations, but Diodes Incorporated explicitly marks this series as "NOT RECOMMENDED FOR NEW DESIGN." For new automotive designs, consult Diodes' AEC-Q101-qualified alternatives such as the SBRA2030HCT or APx2035CT series with extended qualification and PPAP support.