Diodes Incorporated SBRTF40U100CT

Overview

SBRTF40U100CT from Diodes Incorporated is a 100 V, 40 A dual common-cathode Trench Super Barrier Rectifier (SBR®) in TO220AB package, delivering ultra-low forward voltage (0.34 V @ 5 A, 125°C), <0.5 mA reverse leakage at 100 V/25°C, and avalanche-rated ruggedness for high-efficiency DC-DC converters and AC-DC adapters.

For engineers reviewing the SBRTF40U100CT datasheet, SBRTF40U100CT pinout, SBRTF40U100CT application, or SBRTF40U100CT equivalent, key selection criteria include forward voltage vs. temperature stability, thermal resistance (R_θJC = 1°C/W), peak surge rating (200 A), and RoHS-compliant lead-free construction.

Technical Context

This dual-diode rectifier integrates two independent SBR® die in a single TO220AB thermally optimized package with common cathode configuration. Its patented super barrier architecture replaces Schottky junctions with controlled metal-semiconductor interfaces to suppress reverse leakage while maintaining low VF across -55°C to +150°C.

The device operates as a synchronous rectification alternative in high-frequency switching topologies, leveraging low Q_rr (implied by fast recovery behavior in Fig. 1–3) and minimal stored charge. Thermal design relies on direct junction-to-case conduction (R_θJC = 1°C/W) rather than ambient-limited dissipation.

Key Specifications

Pinout & Package

TO220AB package with 3-terminal configuration: Pin 1 (Anode 1), Pin 2 (Cathode – common), Pin 3 (Anode 2). Molded plastic case meets UL 94V-0 flammability rating; matte tin terminals comply with MIL-STD-202 solderability.

Key Features

Applications

Availability

SBRTF40U100CT is available at Aetrix Electronics and suitable for DC-DC converters, AC-DC adapters, and industrial power supplies requiring stable component supply and long-term manufacturability assurance.

Supply support for SBRTF40U100CT 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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.

The Trench SBR® product line targets high-efficiency power conversion systems where low VF, high-temperature leakage stability, and avalanche ruggedness are critical-especially in compact, thermally constrained adapters and telecom PSUs.

FAQ

What is the thermal resistance from junction to case (R_θJC) for SBRTF40U100CT?

The R_θJC is 1°C/W per diode leg, measured with no additional heatsink. This value is confirmed in the "Thermal Characteristics" table of DS37804 Rev. 2–3, page 2, and enables direct mounting to aluminum heatsinks for high-power-density layouts.

Is SBRTF40U100CT pin-compatible with standard TO220AB dual-diode rectifiers?

Yes - it uses the industry-standard TO220AB 3-pin outline with Anode–Cathode–Anode pin assignment (Pin 1 = A1, Pin 2 = K, Pin 3 = A2), matching footprint and mounting hole pattern of equivalents like MUR420 or STTH30L06.

Why is SBRTF40U100CT marked "NOT RECOMMENDED FOR NEW DESIGN"?

This designation appears in the official Diodes datasheet (DS37804, page 1) due to planned obsolescence; Diodes recommends newer SBR variants such as SBRTF40U100CT-13 or SBRTF40U100CTFP for new designs, though SBRTF40U100CT remains fully supported for existing production.

Does SBRTF40U100CT require derating above 25°C ambient?

Yes - Figure 5 in DS37804 shows linear current derating starting at 25°C. At 100°C case temperature, the per-leg average current drops to ~12 A; full 40 A total rating is only valid with active heatsinking maintaining T_C ≤ 75°C.