Diodes Incorporated SBR20U150CT

Overview

SBR20U150CT from Diodes Incorporated is a 20A dual common-cathode super barrier rectifier in TO-220AB package, rated for 150V peak reverse voltage, with typical forward voltage of 0.65V at 10A and 125°C, and thermal resistance of 2°C/W junction-to-case. It serves as a high-efficiency output rectifier in AC/DC and DC/DC power supplies for telecom and industrial equipment.

For engineers reviewing the SBR20U150CT datasheet, SBR20U150CT pinout, SBR20U150CT application, or SBR20U150CT equivalent, key selection criteria include forward voltage drop at elevated temperature, surge current capability (200A IFSM), leakage current stability up to 175°C, and TO-220AB thermal performance in high-density power designs.

Technical Context

This dual-diode rectifier integrates two independent SBR® (Super Barrier Rectifier) die in a single TO-220AB thermally optimized package, sharing a common cathode terminal. Its patented barrier structure enables lower VF than standard Schottky diodes while maintaining superior high-temperature leakage performance.

The device operates across –65°C to +175°C junction temperature range, with soft, fast switching behavior confirmed by low reverse recovery charge and minimal ringing in flyback and LLC resonant topologies. It is not a silicon carbide or trench MOSFET-based device - it is a planar silicon super barrier rectifier with annealed copper leadframe and matte tin terminals.

Key Specifications

Pinout & Package

TO-220AB package with three terminals: Pin 1 (Anode 1), Pin 2 (Cathode, common), Pin 3 (Anode 2). Molded plastic case meets UL 94V-0 flammability rating; matte tin-plated copper leadframe ensures solderability per MIL-STD-202, Method 208.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-20CPH07 and MUR2020CT, SBR20U150CT uniquely balances 150V rating, sub-0.65V VF at 125°C, and TO-220AB thermal density - making it optimal for compact, high-efficiency 12–48V industrial and telecom power stages where both voltage margin and thermal headroom are critical.

Availability

SBR20U150CT is available at Aetrix Electronics and suitable for telecom power supplies, industrial DC/DC converters, LED driver power stages, and server PSU hold-up circuits requiring stable component supply and long-term manufacturability.

Supply support for SBR20U150CT 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 the Americas.

The SBR® (Super Barrier Rectifier) product line was developed to deliver Schottky-like forward performance with enhanced high-temperature reliability for high-efficiency AC/DC and DC/DC power conversion in industrial, computing, and communications infrastructure.

FAQ

Is SBR20U150CT pin-compatible with standard TO-220AB dual diodes like MUR2020CT?

Yes - SBR20U150CT uses identical TO-220AB mechanical outline and pin configuration (Anode1–Cathode–Anode2), enabling direct PCB footprint replacement. However, its lower forward voltage and softer recovery require verification of snubber sizing and thermal margin in legacy designs originally using ultrafast or standard recovery diodes.

What is the maximum recommended case temperature for continuous operation?

The maximum case temperature is derived from the 175°C maximum junction temperature and 2°C/W RθJC: at 20A total current and 0.65V VF, power dissipation is ~6.5W per leg (13W total), limiting case temperature to ≤149°C for safe 175°C junction operation. Derating above 125°C ambient is shown in Figure 4 of DS30979.

Does SBR20U150CT require a thermal pad under the tab for reliable operation?

No thermal pad is required, but strongly recommended. The TO-220AB metal tab is electrically connected to the cathode (Pin 2) and serves as the primary heat path. A 0.1mm thermal pad (k ≥ 1.5 W/m·K) improves thermal transfer by ~15% versus bare metal contact, especially on non-anodized aluminum heatsinks per Diodes' AP02002 mounting guidelines.

Can SBR20U150CT be used in synchronous rectification mode?

No - it is a passive rectifier with fixed anode–cathode polarity and no gate control. It cannot replace MOSFETs in synchronous rectification. However, its low VF and soft switching make it a preferred alternative to active solutions in cost-sensitive, medium-frequency (<300 kHz) designs where gate drive complexity or layout constraints preclude MOSFET use.