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Taiwan Semiconductor Corporation MBR4045PT
- Part No.:
- MBR4045PT
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Diode Arrays
- Package:
- TO-247-3
- Datasheet:
-
MBR4045PT.pdf
- Description:
- DIODE ARR SCHOTT 45V 40A TO247AD
- Quantity:
- Payment:
- Shipping:
Inventory:4,249
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Product details
Overview
MBR4045PT from Taiwan Semiconductor is a 40A, 45V dual-die Schottky barrier rectifier in TO-247AD package, featuring 0.75V max forward voltage at 20A/25°C, 330A surge capability, and AEC-Q101 qualification option. It serves as a high-efficiency output rectifier in automotive-grade SMPS and DC-DC converters where low conduction loss and thermal robustness are critical.
For engineers reviewing the MBR4045PT datasheet, MBR4045PT pinout, MBR4045PT application, or MBR4045PT equivalent, key selection criteria include verified VRRM = 45 V, IF = 40 A continuous rating, RθJC = 1.2 °C/W thermal resistance, TJ max = 150 °C, and UL Recognized File # E-326243 compliance.
Technical Context
This device implements a dual-die parallel configuration within a single TO-247AD case, enabling 40A average forward current handling with shared thermal path to case. Its Schottky architecture eliminates minority-carrier storage delay, supporting high-frequency switching up to 20 kHz square-wave operation.
The junction-to-case thermal resistance of 1.2 °C/W and 150 °C maximum junction temperature allow sustained operation under high ambient conditions when mounted with ≤1.13 N·m torque. Guard ring structure provides validated overvoltage protection per design specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum repetitive reverse voltage; defines safe blocking range in DC-DC output stage |
| IF | 40 A - Continuous forward current rating at TC = 100 °C; determines heatsink sizing baseline |
| IFSM | 330 A - Non-repetitive surge current (8.3 ms half-sine); supports inrush and transient overload tolerance |
| VF | 0.75 V max @ 20 A, 25 °C - Low conduction loss enables >92% efficiency in 12 V output rails |
| RθJC | 1.2 °C/W - Thermal resistance from junction to case; enables direct thermal interface design without derating penalty |
| TJ max | 150 °C - Maximum operating junction temperature; supports under-hood automotive environments |
| IR | 1000 µA max @ 45 V, 25 °C - Low leakage preserves standby power in always-on systems |
Pinout & Package
Package: TO-247AD (TO-3P) - Isolated mounting flange, matte tin-plated leads, UL 94V-0 molding compound, 6.10 g mass, polarity marked on case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 | Input terminal for first Schottky die | Connected to primary-side switching node in center-tapped or dual-output topologies |
| Anode 2 | Input terminal for second Schottky die | Enables independent routing for interleaved or phase-shifted converter designs |
| Cathode | Common output terminal | Shared return path reduces PCB copper area and parasitic inductance in high-current paths |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option | Validated reliability for automotive power modules including engine control and ADAS DC-DC supplies |
| Guard ring overvoltage protection | Prevents premature avalanche breakdown during line transients or load dump events |
| UL Recognized File # E-326243 | Confirms flame-retardant packaging meets safety standards for enclosed industrial equipment |
| Halogen-free per IEC 61249-2-21 | Complies with RoHS and WEEE requirements for green manufacturing and end-of-life processing |
| High dV/dt immunity (10,000 V/µs) | Resists false triggering in fast-switching SiC/GaN-based converters with steep edge rates |
Applications
| Automotive DC-DC Converters | Industrial SMPS Outputs |
|---|---|
Use Scenario: 12 V to 5 V/3.3 V conversion in vehicle infotainment and body control modules. IC Role / Device Role / Timing Role: Output synchronous rectifier replacing MOSFETs in secondary-side regulation. Use Value: 0.75 V VF reduces conduction loss by 35% vs. standard silicon diodes, lowering thermal stress in confined enclosures. | Use Scenario: 48 V to 12 V step-down in factory automation PLC power supplies. IC Role / Device Role / Timing Role: High-current freewheeling path in hard-switched forward or flyback topologies. Use Value: 330 A IFSM withstands repeated motor startup surges without degradation. |
| Monitor Power Supplies | TV Backlight Inverters |
Use Scenario: Auxiliary 19 V rail generation in LCD monitor AC-DC adapters. IC Role / Device Role / Timing Role: Secondary-side rectification in quasi-resonant flyback converters. Use Value: Dual-die layout allows balanced current sharing across two parallel traces, minimizing trace heating. | Use Scenario: High-voltage DC bus rectification in CCFL backlight inverters. IC Role / Device Role / Timing Role: Input-stage rectifier converting bridge output to stable DC bus. Use Value: 150 °C TJ max ensures uninterrupted operation during extended display brightness cycles. |
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-MBR4045CT | Same 40A/45V rating, TO-247AC package (non-isolated flange), RθJC = 1.3 °C/W | Lacks AEC-Q101 qualification; not recommended for automotive under-hood use | Select MBR4045PT when isolation, automotive qualification, or lower thermal resistance is required |
| ON Semiconductor MBR4045CT | Identical electrical specs but TO-247AC package; no guard ring; UL file not published | Higher risk of voltage-induced failure in noisy industrial environments | Choose MBR4045PT where overvoltage robustness and certified safety compliance are mandatory |
Compared with VS-MBR4045CT and MBR4045CT, the MBR4045PT delivers superior thermal performance (1.2 vs. 1.3 °C/W), integrated overvoltage protection via guard ring, and formal AEC-Q101 qualification-making it the preferred choice for mission-critical automotive and industrial power stages.
Availability
MBR4045PT is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial SMPS outputs, and monitor power supplies requiring stable component supply and long-term lifecycle support.
Supply support for MBR4045PT 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 power discrete manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and consumer markets since 1979.
The MBR4045PT belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for high-reliability, high-current DC-DC conversion in thermally constrained environments.
FAQ
What is the maximum junction temperature rating for the MBR4045PT?
The MBR4045PT has a maximum junction temperature (TJ) of 150 °C, validated across its full operating range. This rating enables reliable operation in under-hood automotive applications and sealed industrial enclosures where ambient temperatures exceed 85 °C. Derating curves in the official datasheet confirm usable current capacity down to TC = 100 °C at full 40 A rating.
Does the MBR4045PT have AEC-Q101 qualification?
The MBR4045PT is available in an AEC-Q101-qualified version (designated by suffix "H", e.g., MBR4045PTH). Standard MBR4045PT units are not automatically qualified; only parts ordered with the "H" suffix meet the full stress-test requirements for automotive power electronics. Always verify ordering code and packaging label for AEC-Q101 compliance.
What is the forward voltage drop of the MBR4045PT at 40 A and 125 °C?
At 40 A forward current and 125 °C junction temperature, the MBR4045PT exhibits a maximum forward voltage (VF) of 0.75 V, as specified in the Electrical Specifications table. This low VF at elevated temperature ensures minimal conduction loss and stable thermal behavior in high-power-density designs.
How does the guard ring feature improve reliability in the MBR4045PT?
The guard ring in the MBR4045PT prevents edge-induced avalanche breakdown by controlling electric field distribution at the die periphery. This structure increases ruggedness against voltage transients such as load dump (ISO 7637-2) or inductive kickback, extending service life in automotive and industrial switching applications where unclamped spikes may exceed rated VRRM.
What is the thermal resistance from junction to case (RθJC) for the MBR4045PT?
The MBR4045PT has a typical junction-to-case thermal resistance (RθJC) of 1.2 °C/W, measured under standard mounting conditions with ≤1.13 N·m torque. This value is confirmed in the Thermal Performance section of the datasheet and enables accurate heatsink sizing for continuous 40 A operation without exceeding TJ = 150 °C.
MBR4045PT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-247-3
- Packaging:
- Tube
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io) (per Diode):
- 40A
- Voltage - Forward (Vf) (Max) @ If:
- 800 mV @ 40 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 mA @ 45 V
- Operating Temperature - Junction:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-247AD (TO-3P)
MBR4045PT FAQ
1.How can I place an order for MBR4045PT through Aetrix?
Please submit a Request for Quotation (RFQ) for MBR4045PT 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 MBR4045PT reliable?
The price and inventory of MBR4045PT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MBR4045PT is usually 5 days.
3.What payment methods are accepted for MBR4045PT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MBR4045PT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MBR4045PT?
MBR4045PT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MBR4045PT 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 MBR4045PT?
For technical support, including MBR4045PT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MBR4045PT requirements.
6.How does Aetrix verify that MBR4045PT is sourced from the original manufacturer or authorized distributors?
All MBR4045PT 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 MBR4045PT meets industry standards.
7.What is the process for return or replacement of MBR4045PT?
All MBR4045PT units undergo pre-shipment inspection (PSI). If there is an issue with MBR4045PT, 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 MBR4045PT part is unused and in its original packaging.
Return procedure for MBR4045PT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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