Diodes Incorporated MBR2045LCT-E1

Overview

MBR2045LCT-E1 from Diodes Incorporated is a dual high-efficiency Schottky rectifier in TO-220-3 (2) package, rated for 45 V reverse voltage, 10 A average forward current per diode leg, and 0.7 V max forward voltage at 10 A and +25°C. It serves as output rectification in high-frequency switch-mode power supplies requiring low switching loss and low noise.

For engineers reviewing the MBR2045LCT-E1 datasheet, MBR2045LCT-E1 pinout, MBR2045LCT-E1 application, or MBR2045LCT-E1 equivalent, key selection criteria include dual-leg thermal derating, junction-to-case thermal resistance of 2.0°C/W, RoHS-compliant matte tin terminations, and guard-ring stress protection for reliability in medium-voltage DC-DC converters.

Technical Context

This dual common-cathode Schottky rectifier integrates two independent 45 V/10 A diode legs sharing a single cathode terminal (Pin 3), enabling synchronous or interleaved output rectification topologies. Its low VF and fast recovery support high-frequency operation up to 20 kHz with minimal conduction and switching losses.

The device features a guard-ring structure to suppress edge breakdown and sustain 150°C maximum junction temperature. Thermal performance is optimized for mounting on heatsinks, with RθJC = 2.0°C/W and RθJA = 60°C/W under defined PCB layout conditions.

Key Specifications

Pinout & Package

Package: TO-220-3 (2), molded plastic case with UL 94V-0 flammability rating, matte tin–annealed copper leadframe, 1.9 g typical weight.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual Schottky rectifier applications.

Compared with VS-20BQ040PBF and MBR2045CT, MBR2045LCT-E1 uniquely combines RoHS compliance, common-cathode integration, and 0.7 V VF at +25°C-enabling smaller footprint, lower system-level conduction loss, and guaranteed environmental compliance in new industrial and telecom designs.

Availability

MBR2045LCT-E1 is available at Aetrix Electronics and suitable for server power supplies, industrial AC-DC adapters, telecom PoE++ PSEs, and automotive DC-DC converters requiring stable component supply across multi-year production cycles.

Supply support for MBR2045LCT-E1 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-performance, high-reliability components for power management, signal integrity, and protection applications.

The MBR2045LCT-E1 belongs to Diodes' high-efficiency Schottky rectifier product line, engineered specifically for high-frequency, medium-voltage power conversion where low VF, low IR, and robust thermal performance are critical.

FAQ

What is the pin configuration for MBR2045LCT-E1?

MBR2045LCT-E1 uses a TO-220-3 (2) package with Pin 1 = Anode 1, Pin 2 = Anode 2, and Pin 3 = Common Cathode. This dual-anode/common-cathode arrangement supports interleaved or parallel rectification without external diode pairing. The front-view marking shows "MBR2045LCT-E1" with date code below, and polarity is confirmed by the internal schematic showing two anodes feeding into one cathode node.

Can MBR2045LCT-E1 replace a single 20 A Schottky rectifier?

No-it is a dual 10 A device with independent anode terminals and a shared cathode, not a single 20 A rectifier. Using it as a drop-in replacement for a monolithic 20 A part would misroute current paths and violate thermal derating. It is designed for dual-leg topologies like center-tapped or dual-phase outputs, where each leg carries ≤10 A average current.

What is the maximum allowable case temperature for continuous operation?

The datasheet specifies IF(AV) = 10 A per leg at TC = +137°C. Exceeding this case temperature requires linear derating per Figure 4; at TC = +100°C, IF(AV) rises to ~13.5 A per leg. Sustained operation above +137°C risks exceeding the +150°C junction limit unless thermal resistance is reduced via enhanced heatsinking or forced airflow.

Does MBR2045LCT-E1 support reflow soldering?

Yes-its matte tin–annealed copper leadframe meets J-STD-020 moisture sensitivity level (MSL) 1 and is qualified for lead-free reflow profiles up to 260°C peak. The TO-220-3 (2) package must be mounted with adequate thermal relief pads and minimum 2.54 mm clearance to adjacent copper to avoid solder wicking and mechanical stress during thermal cycling.