Diodes Incorporated MBR2045CT-LJ-01

Overview

MBR2045CT-LJ-01 from Diodes Incorporated is a dual common-cathode Schottky barrier rectifier in TO-220AB package, rated 45 V reverse voltage, 10 A average forward current per leg, 0.64 V max forward voltage at 10 A and +25°C, and 0.1 mA max reverse leakage at rated voltage and +25°C - used as polarity protection and freewheeling diode in DC power supplies and motor control circuits.

For engineers reviewing the MBR2045CT-LJ-01 datasheet, MBR2045CT-LJ-01 pinout, MBR2045CT-LJ-01 application, or MBR2045CT-LJ-01 equivalent, key selection criteria include per-leg forward voltage drop at high current, thermal resistance to case (2°C/W), surge current rating (180 A), RoHS-compliant lead-free finish, and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This device integrates two independent Schottky diodes sharing a common cathode terminal, enabling synchronous rectification or dual-path DC output management. Its guard ring die construction suppresses edge breakdown, while low VF minimizes conduction loss in high-efficiency 12–24 V systems.

Designed for commercial and automotive applications, it operates across –55°C to +150°C junction temperature with 2°C/W typical R_θJC when mounted on a heatsink. The TO-220AB package supports direct PCB mounting with through-hole leads and provides mechanical robustness for industrial environments.

Key Specifications

Pinout & Package

TO-220AB (Type C) package with three leads: Pin 1 (Anode 1), Pin 2 (Cathode, common), Pin 3 (Anode 2). Case is electrically isolated and thermally conductive; mounting tab connects to cathode.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-20CPH04-M3 and MBR2045CTG, MBR2045CT-LJ-01 uniquely combines common-cathode dual-leg topology, AEC-Q101 qualification, and 2°C/W R_θJC, making it optimal for space-constrained automotive power nodes requiring both redundancy and thermal performance.

Availability

MBR2045CT-LJ-01 is available at Aetrix Electronics and suitable for DC power supplies, automotive body control modules, and brushed DC motor drivers requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for MBR2045CT-LJ-01 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 MBR20xxCT series belongs to Diodes' high-current Schottky rectifier product line, engineered specifically for efficiency-critical 12–48 V power conversion in automotive, industrial, and telecom infrastructure.

FAQ

What is the thermal resistance from junction to case (R_θJC) for MBR2045CT-LJ-01?

The typical R_θJC is 2°C/W for the TO-220AB package when mounted on a heatsink per Diodes' recommended pad layout. This value assumes direct metal-to-metal contact between the device tab and heatsink surface with thermal interface material. Derating curves in DS23016 show 10 A/leg operation is sustainable up to +70°C ambient with proper heatsinking.

Is MBR2045CT-LJ-01 suitable for automotive applications?

Yes - it is AEC-Q101 qualified for high-reliability automotive use, including underhood environments. It passes temperature cycling, high-temperature reverse bias, and ESD testing per the AEC standard. Its 150°C max junction temperature and low leakage support engine control units and body electronics operating in harsh thermal conditions.

How does the common-cathode configuration affect PCB layout?

The shared cathode (Pin 2) serves as the single output node for both diode legs, simplifying bus routing and reducing copper area. Layout must connect Pin 2 directly to the main ground/power return plane with minimum trace length and width ≥2 mm to handle 20 A total current and minimize inductance-induced voltage spikes during switching.

What is the maximum surge current rating and test condition?

The non-repetitive peak forward surge current (I_FSM) is 180 A, tested using an 8.3 ms single half-sine wave superimposed on rated load. This rating applies per leg and reflects capability to absorb energy from inductive transients such as motor coil collapse or relay de-energization without failure.