Diodes Incorporated SBL3045CTP

Overview

SBL3045CTP from Diodes Incorporated is a 30A dual common-cathode Schottky barrier rectifier in ITO-220S package, rated for 45V peak reverse voltage, 15A average current per leg, 0.62V forward voltage at 15A/25°C, and 2000V isolation between heatsink tab and cathode. It serves as high-efficiency secondary-side rectifier in AC/DC power supplies and DC/DC converters.

For engineers reviewing the SBL3045CTP datasheet, SBL3045CTP pinout, SBL3045CTP application, or SBL3045CTP equivalent, key selection criteria include per-leg thermal resistance (3°C/W), soft fast switching behavior, UL 1557 certification, electrically isolated heatsink tab, and derating curve compliance up to 150°C junction temperature.

Technical Context

This dual-anode Schottky rectifier integrates two independent 15A legs sharing a common cathode terminal, enabling synchronous or interleaved rectification topologies. Its low VF (≤0.62V @15A) and soft recovery reduce conduction losses and EMI in high-frequency switch-mode power supplies.

The ITO-220S package features an electrically isolated metal tab rated for 2000V AC isolation, allowing direct mounting to grounded heatsinks without insulation hardware. Thermal resistance from junction to case is 3°C/W per leg, supporting high-power density designs with controlled thermal management.

Key Specifications

Pinout & Package

ITO-220S package with electrically isolated metal heatsink tab (pin 3), three external terminals: Pin 1 (Anode 1), Pin 2 (Common Cathode), Pin 4 (Anode 2). Tab is internally isolated from cathode and rated for 2000V AC.

Key Features

Applications

Availability

SBL3045CTP is available at Aetrix Electronics and suitable for server power supplies, industrial DC/DC converters, telecom rectifier modules, and LED driver power stages requiring stable component supply despite its obsolete status.

Supply support for SBL3045CTP 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.

The SBL3045CTP belongs to Diodes' high-current Schottky rectifier product line, engineered for high-efficiency secondary-side rectification in AC/DC and isolated DC/DC power conversion systems where low VF, thermal robustness, and safety certification are critical.

FAQ

Is SBL3045CTP still in production?

No, SBL3045CTP is officially obsolete and discontinued by Diodes Incorporated as of October 2015. It is no longer manufactured, but Aetrix Electronics maintains legacy inventory and supports end-of-life procurement with full traceability and documentation.

What does "ITO-220S" mean for thermal design?

ITO-220S denotes a variant of the TO-220 outline with an electrically isolated metal tab. Unlike standard TO-220, its heatsink tab is internally insulated from the cathode terminal, enabling direct mounting to grounded chassis without additional insulators while maintaining 2000V AC isolation.

Can SBL3045CTP replace a single-anode 30A Schottky?

Yes, but only in dual-anode configurations such as center-tapped transformers or interleaved outputs. Its common-cathode structure requires circuit-level adaptation-direct substitution for single-anode parts like SB3040CT is not electrically compatible without redesigning the rectifier layout.

Why is the forward voltage specified at 15A instead of 30A?

Because SBL3045CTP contains two independent 15A-rated Schottky elements sharing one cathode. Each leg conducts up to 15A continuously; the 30A total rating reflects combined capability under balanced loading-not per-leg current. VF is therefore specified per leg at 15A, consistent with thermal and electrical limits.