Diodes Incorporated SBL30L30CT

Overview

SBL30L30CT from Diodes Incorporated is a 30A dual low forward-voltage Schottky barrier rectifier in TO-220AB package, configured as two independent 15A anode-common diodes with 30V reverse voltage rating, used for high-frequency freewheeling and polarity protection in DC-DC converters and industrial power supplies.

For engineers reviewing the SBL30L30CT datasheet, SBL30L30CT pinout, SBL30L30CT application, or SBL30L30CT equivalent, key selection criteria include its 0.48V typical VF at 30A/25°C, 260A non-repetitive surge capability per element, thermal resistance of 0.8°C/W junction-to-case, and TO-220AB mechanical compatibility with standard heatsink mounting.

Technical Context

This dual Schottky rectifier integrates two independent 30V/15A diodes in a single TO-220AB case with common-anode configuration (Pin 1 = anode, Pin 2 = cathode A, Pin 3 = cathode B), enabling synchronous rectification or dual-path freewheeling without external isolation. Its guard ring structure provides transient overvoltage protection, and low dV/dt rating (10,000 V/μs) supports stable operation in fast-switching topologies.

The device operates across –65°C to +150°C, with thermal resistance of 0.8°C/W (junction-to-case per diode) when mounted on a 200×200×5 mm aluminum plate. Forward voltage remains below 0.57V at 30A/125°C, ensuring efficiency retention under elevated ambient conditions in enclosed power modules.

Key Specifications

Pinout & Package

Package: TO-220AB molded plastic case (UL 94V-0), 2.24 g weight, lead-free and RoHS-compliant terminals. Mounting requires insulating washer due to electrically active metal tab (Pin 1/anode).

Key Features

Applications

Availability

SBL30L30CT is available at Aetrix Electronics and suitable for industrial motor drives, telecom DC-DC converters, and LED lighting power supplies requiring stable component supply despite end-of-life status.

Supply support for SBL30L30CT 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-efficiency power management and signal integrity solutions for industrial, computing, and consumer markets.

The SBL30L30CT belongs to Diodes' Schottky rectifier product line, engineered for high-current, low-VF operation in switching power supplies where thermal management and conduction loss are critical design constraints.

FAQ

Is SBL30L30CT still in production?

No. Diodes Incorporated has officially discontinued SBL30L30CT and declared it obsolete with no alternate part offered. Aetrix Electronics maintains limited legacy stock for ongoing production support but does not offer long-term supply assurance.

What is the pin configuration and thermal mounting requirement?

Pin 1 is the common anode (electrically connected to the metal tab), Pins 2 and 3 are independent cathodes. The TO-220AB tab must be electrically isolated from the heatsink using a mica or polymer washer, as it carries the anode potential.

How does its forward voltage compare at elevated temperature?

At 30A and 125°C, VF is 0.57V maximum (typical 0.50V), showing minimal positive temperature coefficient-unlike silicon diodes-enabling stable parallel operation and predictable thermal runaway margin.

Can it replace standard silicon rectifiers in existing designs?

Yes, provided reverse voltage requirements stay ≤30V and layout accommodates TO-220AB footprint. Its lower VF reduces conduction loss, but designers must verify that reduced reverse recovery noise doesn't affect EMI filtering or gate-drive coupling in sensitive circuits.