SMC Diode Solutions MBR2045CT

Overview

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

For engineers reviewing the MBR2045CT datasheet, MBR2045CT pinout, MBR2045CT application, or MBR2045CT equivalent, key selection criteria include low VF for efficiency, 180 A non-repetitive surge rating for transient robustness, thermal resistance of 2°C/W (junction-to-case), and RoHS-compliant matte tin terminals suitable for lead-free reflow.

Technical Context

This dual-diode configuration shares a common cathode terminal, enabling synchronous rectification or dual-path DC output management. Each leg operates independently with identical electrical specs: 45 V VRRM, 10 A IO, and 0.64 V VF max at 10 A/25°C.

Thermal performance is defined by RθJC = 2°C/W (TO-220AB) when mounted on a heatsink, supporting continuous operation up to +150°C junction temperature. Leakage remains ≤0.1 mA at rated VR and 25°C, critical for standby power integrity.

Key Specifications

Pinout & Package

Package: TO-220AB (Type C), molded plastic case with UL 94V-0 flammability rating, matte tin-plated copper leadframe, weight ≈1.95 g. Mounting tab is cathode-connected and electrically active.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-MBR2045CT and MBR2045CTG, the Diodes Incorporated MBR2045CT offers balanced performance: lower VF than Vishay's part for reduced conduction loss, and tighter thermal resistance (2°C/W) than ON Semi's variant, making it optimal for heatsink-limited industrial power modules.

Availability

MBR2045CT is available at Aetrix Electronics and suitable for DC-DC converters, industrial power supplies, and automotive body control modules requiring stable component supply and long-term lifecycle support.

Supply support for MBR2045CT 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 for commercial and automotive power conversion where low VF, surge robustness, and AEC-Q101 reliability are mandatory.

FAQ

Is MBR2045CT suitable for surface-mount assembly?

No - MBR2045CT uses a through-hole TO-220AB package with three leads and an insulated metal tab. It requires wave soldering or hand-soldering with mechanical mounting to a heatsink. SMT alternatives like DFN5 or SO-8 Schottky arrays exist but differ in current rating and thermal path.

What is the maximum operating temperature without heatsink?

Without heatsink, the device is limited by RθJA = 15°C/W. At 10 A and 0.64 V VF, power dissipation is 6.4 W; ambient must stay below 55°C to keep junction ≤150°C. Derating curves in DS23016 show usable current drops to ~3.5 A at 70°C ambient with no heatsink.

Does MBR2045CT have integrated ESD protection?

No - it is a passive Schottky rectifier with no internal ESD structures. System-level ESD protection (e.g., TVS diodes) must be added externally if exposed to IEC 61000-4-2 events. Its guard ring die improves ruggedness against voltage transients but does not meet ESD immunity standards alone.

Can MBR2045CT replace MBR2060CT in a 45 V design?

Yes - MBR2045CT has identical package, pinout, and current rating as MBR2060CT but lower VRRM (45 V vs. 60 V). In a 45 V-rated system with sufficient voltage margin, it provides lower VF (0.64 V vs. 0.81 V), reducing conduction loss and thermal load without compromising reliability.