Diodes Incorporated SBR3045CT-G

Overview

SBR3045CT-G from Diodes Incorporated is a 45 V, 30 A total (15 A per leg) dual common-cathode super barrier rectifier in TO220AB package, featuring 0.55 V max forward voltage at 15 A and 0.5 mA max reverse leakage at 45 V/25°C, optimized for high-efficiency DC-DC converters and AC-DC adapters.

For engineers reviewing the SBR3045CT-G datasheet, SBR3045CT-G pinout, SBR3045CT-G application, or SBR3045CT-G equivalent, key selection criteria include its ultra-low VF at high current, rugged avalanche capability versus Schottky diodes, low thermal resistance (2°C/W per leg), and RoHS-compliant green packaging with matte tin terminals.

Technical Context

This dual-diode rectifier uses patented SBR® technology to achieve superior avalanche energy handling over standard Schottky diodes while maintaining low forward voltage. Its common-cathode configuration supports synchronous rectification and freewheeling in center-tapped topologies.

Thermal performance is defined by R_θJC = 2°C/W per leg on an aluminum heatsink (50 × 50 × 23 mm), enabling stable operation up to +150°C junction temperature. Reverse leakage remains below 100 mA at 45 V and +125°C, mitigating thermal runaway risk.

Key Specifications

Pinout & Package

TO220AB package: 3-terminal, insulated tab, vertical mounting with leads bent for PCB through-hole insertion. Cathode common to tab and pin 2; anodes at pins 1 and 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar super barrier rectifier applications.

Compared with SBRT3045CT-G, SBR3045CT-G offers balanced cost-performance for mainstream DC-DC and adapter use, while MBR3045CTG lacks the avalanche ruggedness and high-temp leakage control needed for robust industrial deployment.

Availability

SBR3045CT-G is available at Aetrix Electronics and suitable for server VRMs, industrial AC-DC adapters, telecom DC-DC bricks, and automotive infotainment power supplies requiring stable component supply and long-term manufacturability.

Supply support for SBR3045CT-G 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, manufacturing, and sales operations across Asia, Europe, and North America.

SBR3045CT-G belongs to Diodes' Super Barrier Rectifier (SBR®) product line, engineered specifically to replace Schottky diodes in high-current, high-temperature power conversion where avalanche ruggedness and low VF are jointly critical.

FAQ

Is SBR3045CT-G pin-compatible with standard TO220AB dual diodes like MBR3045CTG?

Yes-SBR3045CT-G uses identical TO220AB mechanical outline and 3-pin common-cathode pinout (anode-anode-cathode). No PCB redesign is required for drop-in replacement, though thermal and electrical validation is recommended due to differences in VF and avalanche behavior.

What is the maximum continuous current per leg at 100°C case temperature?

Per the derating curve in DS30968 Rev. 5–2, SBR3045CT-G supports 12.5 A per leg at T_C = 100°C. This is derived from linear interpolation between 15 A at 25°C and ~9 A at 125°C, consistent with its 2°C/W R_θJC and 150°C T_J(max).

Does the "-G" suffix indicate halogen-free status beyond RoHS compliance?

Yes-the "-G" suffix denotes Diodes Incorporated's "Green" specification: <900 ppm bromine, <900 ppm chlorine (<1500 ppm total Br+Cl), and <1000 ppm antimony, verified per internal material testing protocols and documented in their Green Products policy.

Can SBR3045CT-G be used in place of a single 30 A Schottky in a center-tapped transformer design?

No-it is a dual 15 A device with common cathode, not a single 30 A element. In center-tapped designs, both anodes conduct alternately; total output current remains 30 A, but per-leg current must stay ≤15 A. Using it as a single-path rectifier risks overstressing one die.