Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation MBRAD545H

Name: MBRAD545H
Brand: Taiwan Semiconductor Corporation
SKU: MBRAD545H
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: MBRAD545H

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: MBRAD545H.pdf

Description:: 5A, 45V, SCHOTTKY RECTIFIER

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,500

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

MBRAD545H from Taiwan Semiconductor is a 5 A, 45 V Schottky barrier rectifier in ThinDPAK package, designed for low-loss freewheeling and reverse battery protection in automotive DC/DC converters. It features 0.58 V forward voltage at 5 A/25°C, 120 A surge capability, AEC-Q101 qualification, and operates up to 150°C junction temperature.

For engineers reviewing the MBRAD545H datasheet, MBRAD545H pinout, MBRAD545H application, or MBRAD545H equivalent, key selection criteria include forward voltage at high temperature, thermal resistance (R_θJL = 2.3°C/W), surge rating (IFSM = 120 A @ 8.3 ms), and AEC-Q101 compliance for under-hood automotive use.

Technical Context

The MBRAD545H uses a single-die Schottky structure optimized for low VF and fast switching in high-frequency power conversion. Its 302 pF junction capacitance at 4 V reverse bias supports operation in DC/DC topologies above 100 kHz without excessive switching loss.

Thermal design leverages the ThinDPAK's low R_θJL of 2.3°C/W with ideal heatsink and R_θJC of 3.8°C/W on 2"×3" aluminum plate - enabling sustained 5 A conduction in compact automotive modules where ambient temperatures reach 105°C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	45 V - Maximum reverse blocking voltage; defines safe operating range in 24 V automotive systems with load dump transients.
I_F	5 A continuous - Rated average forward current at case temperature ≤ 110°C; supports compact heatsinking in space-constrained modules.
I_FSM	120 A @ 8.3 ms - Peak non-repetitive surge current; handles motor startup and inductive kickback without failure.
V_F	0.58 V max @ 5 A, 25°C - Low conduction loss improves efficiency in 12–24 V DC/DC converters; drops to 0.50 V @ 125°C.
T_J max	150°C - Maximum junction temperature; enables operation in engine bay environments with minimal derating.
R_θJL	2.3°C/W - Junction-to-lead thermal resistance with ideal heatsink; allows direct PCB copper pour thermal path without external heatsink.
C_J	302 pF @ 1 MHz, 4 V - Low junction capacitance minimizes reverse recovery charge and EMI in high-frequency switching.

Pinout & Package

Package: ThinDPAK (JEDEC TO-252 variation AE), surface-mount, single-die configuration with cathode band marking. Matte tin-plated leads, moisture sensitivity level 1 per J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1 (Anode)	Input current terminal	Connected to source side (e.g., switch node or battery positive); carries full load current with minimal resistive drop.
2 (Cathode)	Output current terminal	Connected to output rail or ground return; marked by visible cathode band; serves as main power path exit.
3 (Tab / Drain)	Thermal & electrical connection	Exposed metal tab electrically tied to cathode; provides primary thermal path to PCB copper pour or heatsink.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per stress test requirements.
Low VF at high temperature	0.50 V max @ 5 A, 125°C - maintains high efficiency even in hot under-hood conditions.
High I_FSM rating	120 A @ 8.3 ms - withstands repetitive inrush events in lighting and motor control without degradation.
Halogen-free & RoHS compliant	Meets EU Directive 2011/65/EU and JEDEC JS709E; supports environmentally regulated automotive supply chains.
ThinDPAK mechanical robustness	UL 94V-0 molding compound and JESD201 Class 2 whisker resistance - ensures long-term solder joint integrity in vibration-prone vehicles.

Applications

Automotive DC/DC Converters	Reverse Battery Protection
Use Scenario: Step-down conversion from 24 V vehicle battery to 5 V/3.3 V for infotainment and ADAS ECUs. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous buck converter secondary path; conducts during low-side switch off-time. Use Value: 0.58 V forward drop reduces conduction loss by >30% vs. standard PN diodes, improving system efficiency and thermal margin.	Use Scenario: Preventing damage when battery terminals are accidentally reversed during service or jump-starting. IC Role / Device Role / Timing Role: Series-blocking diode placed between battery input and downstream power rails. Use Value: 45 V V_RRM safely blocks reverse polarity while 5 A rating supports full system load without derating.
Car Lighting Drivers	High-Frequency Inverters
Use Scenario: LED headlamp drivers requiring PWM dimming at >1 kHz with minimal thermal rise. IC Role / Device Role / Timing Role: Output rectifier in boost or buck-boost LED driver stage; handles pulsed 5 A loads. Use Value: 302 pF junction capacitance limits displacement current and EMI during fast PWM transitions.	Use Scenario: Compact 24 V to AC inverters for cabin fans or auxiliary power supplies. IC Role / Device Role / Timing Role: Output rectifier in half-bridge inverter output stage; recovers energy during dead time. Use Value: 150°C T_J max and 2.3°C/W R_θJL allow continuous operation at 90% duty cycle in sealed enclosures.

Automotive DC/DC Converters

Reverse Battery Protection

Use Scenario: Step-down conversion from 24 V vehicle battery to 5 V/3.3 V for infotainment and ADAS ECUs.

IC Role / Device Role / Timing Role: Freewheeling diode in synchronous buck converter secondary path; conducts during low-side switch off-time.

Use Value: 0.58 V forward drop reduces conduction loss by >30% vs. standard PN diodes, improving system efficiency and thermal margin.

Use Scenario: Preventing damage when battery terminals are accidentally reversed during service or jump-starting.

IC Role / Device Role / Timing Role: Series-blocking diode placed between battery input and downstream power rails.

Use Value: 45 V V_RRM safely blocks reverse polarity while 5 A rating supports full system load without derating.

Car Lighting Drivers

High-Frequency Inverters

Use Scenario: LED headlamp drivers requiring PWM dimming at >1 kHz with minimal thermal rise.

IC Role / Device Role / Timing Role: Output rectifier in boost or buck-boost LED driver stage; handles pulsed 5 A loads.

Use Value: 302 pF junction capacitance limits displacement current and EMI during fast PWM transitions.

Use Scenario: Compact 24 V to AC inverters for cabin fans or auxiliary power supplies.

IC Role / Device Role / Timing Role: Output rectifier in half-bridge inverter output stage; recovers energy during dead time.

Use Value: 150°C T_J max and 2.3°C/W R_θJL allow continuous operation at 90% duty cycle in sealed enclosures.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Vishay VS-50SQ045	Same 45 V V_RRM, 5 A I_F, but TO-263 package; R_θJA = 15°C/W vs. MBRAD545H's 13.6°C/W.	Requires larger PCB footprint; less suitable for ultra-thin modules due to taller profile.	Select when legacy TO-263 layout exists and thermal margin exceeds 2°C/W.
ON Semiconductor SB540	40 V V_RRM, 5 A I_F, DO-201AD package; VF = 0.55 V @ 5 A, but no AEC-Q101 qualification.	Not rated for automotive under-hood use; limited to industrial or consumer DC/DC.	Select only for cost-sensitive non-automotive designs where 45 V margin is not required.

Compared with VS-50SQ045 and SB540, the MBRAD545H uniquely combines AEC-Q101 qualification, ThinDPAK form factor, and 45 V rating - making it the only option qualified for space-constrained, thermally demanding automotive power rails.

Availability

MBRAD545H is available at Aetrix Electronics and suitable for automotive DC/DC converters, reverse battery protection circuits, and car lighting drivers requiring stable component supply across production lifecycles.

Supply support for MBRAD545H 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

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and computing markets since 1979.

The MBRAD545H belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in automotive under-hood and body electronics.

FAQ

What is the maximum junction temperature rating for the MBRAD545H?

The MBRAD545H has a maximum junction temperature (T_J) of +150°C, verified per absolute maximum ratings table. This rating enables reliable operation in engine compartment environments where ambient temperatures exceed 105°C, provided thermal design meets R_θJL = 2.3°C/W with proper PCB copper pour. The MBRAD545H maintains specified electrical performance up to this limit.

Is the MBRAD545H qualified for automotive applications?

Yes, the MBRAD545H is AEC-Q101 qualified, meaning it has passed stress tests including high-temperature reverse bias, temperature cycling, and unbiased highly accelerated stress testing. This qualification confirms suitability for automotive power systems such as DC/DC converters and lighting modules, as explicitly stated in the device's FEATURES section.

What does the marking code '545' on the MBRAD545H indicate?

The marking code '545' laser-etched on the MBRAD545H package identifies the device variant per ordering information: '5' denotes 5 A forward current rating, '45' indicates 45 V peak reverse voltage, and the 'H' suffix corresponds to ThinDPAK packaging. This matches the official marking diagram in the package outline section of the datasheet.

How does the forward voltage of the MBRAD545H change with temperature?

The MBRAD545H forward voltage decreases with rising junction temperature: it is 0.58 V max at 5 A and 25°C, dropping to 0.50 V max at 5 A and 125°C. This negative temperature coefficient improves thermal stability in parallel configurations and reduces conduction loss in hot environments - a confirmed characteristic per ELECTRICAL SPECIFICATIONS table.

What is the surge current capability of the MBRAD545H?

The MBRAD545H supports a non-repetitive peak forward surge current (I_FSM) of 120 A for 8.3 ms and 260 A for 1.0 ms, as defined in ABSOLUTE MAXIMUM RATINGS. These values are validated per JEDEC standards and enable robust handling of inductive turn-off transients in motor drivers and DC/DC converters without parametric shift or failure.

MBRAD545H Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 45 V

Current - Average Rectified (Io):: 5A

Voltage - Forward (Vf) (Max) @ If:: 700 mV @ 5 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 100 µA @ 45 V

Capacitance @ Vr, F:: 302pF @ 4V, 1MHz

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: ThinDPAK

Operating Temperature - Junction:: -55°C ~ 150°C

MBRAD545H FAQ

1.How can I place an order for MBRAD545H through Aetrix?

Please submit a Request for Quotation (RFQ) for MBRAD545H on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MBRAD545H reliable?

The price and inventory of MBRAD545H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MBRAD545H is usually 5 days.

3.What payment methods are accepted for MBRAD545H?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MBRAD545H transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MBRAD545H?

MBRAD545H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MBRAD545H order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MBRAD545H?

For technical support, including MBRAD545H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MBRAD545H requirements.

6.How does Aetrix verify that MBRAD545H is sourced from the original manufacturer or authorized distributors?

All MBRAD545H products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MBRAD545H meets industry standards.

7.What is the process for return or replacement of MBRAD545H?

All MBRAD545H units undergo pre-shipment inspection (PSI). If there is an issue with MBRAD545H, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MBRAD545H part is unused and in its original packaging.

Return procedure for MBRAD545H:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…