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Taiwan Semiconductor Corporation MBR3045PT
- Part No.:
- MBR3045PT
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Diode Arrays
- Package:
- TO-247-3
- Datasheet:
-
MBR3045PT.pdf
- Description:
- DIODE ARR SCHOTT 45V 30A TO247AD
- Quantity:
- Payment:
- Shipping:
Inventory:985
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Product details
Overview
MBR3045PT from Diodes Incorporated is a 30A, 45V TO-3P dual common-cathode Schottky barrier rectifier optimized for low-voltage, high-frequency DC/DC conversion and freewheeling in switch-mode power supplies. It delivers 0.72V forward voltage at 30A and 25°C, exhibits 200A non-repetitive surge capability, and features guard ring die construction for transient protection.
For engineers reviewing the MBR3045PT datasheet, MBR3045PT pinout, MBR3045PT application, or MBR3045PT equivalent, key selection criteria include its 45V reverse blocking rating, thermal resistance of 1.4°C/W (junction-to-case), 500pF typical capacitance at 1MHz, and RoHS-compliant tin-plated leads suitable for industrial power conversion and automotive auxiliary supplies.
Technical Context
This dual common-cathode Schottky rectifier integrates two identical diode elements sharing one cathode terminal, enabling synchronous rectification or dual-output configurations. Its guard ring die structure enhances ruggedness against voltage transients, while low VF minimizes conduction loss in high-current, low-voltage rails.
Designed for operation up to +150°C junction temperature, it requires heatsink mounting per TO-3P mechanical specification and derates linearly above 125°C case temperature. Capacitance (500pF) and dV/dt rating (10,000 V/µs) support stable switching in 100kHz–500kHz SMPS topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum repetitive reverse voltage; defines safe DC blocking capability in buck converter outputs or polarity protection circuits. |
| IO | 30 A - Average rectified current at TC = 125°C; determines continuous power handling with proper heatsinking. |
| VFM @ 30A, 25°C | 0.72 V - Forward voltage drop; directly sets conduction loss (21.6W at 30A) and thermal load in high-efficiency designs. |
| IFSM | 200 A - 8.3ms half-sine surge rating; supports inrush current tolerance during startup or fault conditions. |
| RθJC | 1.4 °C/W - Junction-to-case thermal resistance; enables precise heatsink sizing when mounted to metal chassis or dedicated thermal pad. |
| CT | 500 pF - Total capacitance at 1MHz/4V; impacts high-frequency switching noise and EMI filter design in DC/DC converters. |
Pinout & Package
Package: TO-3P molded plastic case (UL 94V-0), 5.6g weight, lead-free tin-plated terminals, polarity marked on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 (A1) | Input terminal for first diode element | Connects to switched node (e.g., MOSFET drain) in freewheeling path or input rail in dual-output rectification. |
| Anode 2 (A2) | Input terminal for second diode element | Enables independent connection to separate power paths-e.g., dual DC outputs or redundant inputs. |
| Cathode (K) | Common output node | Shared low-impedance return path; must be thermally coupled to heatsink due to combined 30A current flow. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Improves transient voltage immunity without external snubbers-critical for reliability in automotive 12V systems with load dump events. |
| Low forward voltage (0.72V @ 30A) | Reduces power dissipation by ~15% vs. comparable 40V Schottkys, directly improving system efficiency in 5–12V output converters. |
| High surge rating (200A) | Withstands repeated inrush currents in industrial motor drives and UPS battery charging circuits without degradation. |
| TO-3P package with 1.4°C/W RθJC | Enables compact thermal design using standard chassis-mount heatsinks-no custom thermal interface required for ≤30A operation. |
Applications
| DC/DC Converter Output Rectification | Automotive Auxiliary Power Supply |
|---|---|
Use Scenario: Secondary-side rectification in isolated 12V→3.3V/5V flyback or forward converters for telecom and server PSUs. IC Role / Device Role / Timing Role: Freewheeling diode conducting during MOSFET off-time; defines minimum conduction loss and thermal budget. Use Value: 0.72V VF reduces output-stage loss by >2W vs. legacy silicon diodes, enabling higher power density without forced air cooling. | Use Scenario: Polarity protection and reverse-battery safeguard in 12V vehicle infotainment head units and ADAS camera modules. IC Role / Device Role / Timing Role: Series-connected blocking diode preventing damage during jump-start or incorrect battery connection. Use Value: 45V VRRM exceeds ISO 7637-2 pulse 5a (−150V) clamping requirements when used with TVS, ensuring robust field operation. |
| Industrial Motor Drive Freewheeling | Uninterruptible Power Supply (UPS) Battery Charging |
Use Scenario: Snubberless freewheeling path across IGBTs in 3-phase inverter stages for HVAC compressors and pumps. IC Role / Device Role / Timing Role: Provides low-loss current recirculation during PWM dead time; suppresses voltage spikes via fast recovery. Use Value: 200A IFSM handles peak motor regeneration surges; 10,000 V/µs dV/dt rating prevents false turn-on during fast switching transitions. | Use Scenario: AC/DC front-end rectification and battery charge path isolation in line-interactive UPS systems. IC Role / Device Role / Timing Role: Dual-anode configuration allows independent rectification of charger and inverter paths sharing common DC bus. Use Value: Common-cathode topology simplifies PCB layout and reduces trace inductance on high-current DC bus, lowering EMI emissions. |
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-30CPH045 | Same 45V VRRM, 30A IO, but TO-247AC package; RθJC = 1.5°C/W; VF = 0.74V @ 30A. | Requires different mounting hardware and footprint; slightly higher conduction loss. | Preferred where TO-247 heatsink infrastructure exists and legacy board reuse is critical. |
| ON Semiconductor MBR3045CT | Identical TO-220AB package variant; same electrical specs but lower surge rating (175A vs. 200A); no guard ring. | Limited transient robustness in high-noise industrial environments. | Suitable for cost-sensitive consumer-grade power supplies where surge margin is less critical. |
Compared with MBR3045PT, VS-30CPH045 offers near-identical performance in a different package, while MBR3045CT trades surge capability and transient hardening for lower cost and smaller footprint-making the original optimal for ruggedized 12V/24V industrial systems.
Availability
MBR3045PT is available at Aetrix Electronics and suitable for industrial motor drives, automotive auxiliary power supplies, and uninterruptible power supply (UPS) battery charging requiring stable component supply and long-term lifecycle support.
Supply support for MBR3045PT 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 and manufacturing operations across Asia and the Americas.
The MBR30xxPT series belongs to Diodes' high-current Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in automotive, industrial, and computing applications where low VF and rugged transient response are mandatory.
FAQ
Is MBR3045PT still in active production?
No-MBR3045PT was officially discontinued by Diodes Incorporated in July 2015, as confirmed in DS23017 Rev. 9-4. However, Aetrix Electronics maintains legacy inventory with full traceability and offers extended lifecycle support including obsolescence mitigation planning and cross-reference engineering assistance.
Can MBR3045PT be used in surface-mount designs?
No-it uses the through-hole TO-3P package with three leads designed for chassis-mount heatsinking and manual or wave soldering. It lacks SMD-compatible footprint or thermal pad geometry, and its 5.6g mass exceeds standard reflow handling limits for automated assembly.
What is the maximum recommended case temperature for continuous operation?
The datasheet specifies 30A average current only at TC = 125°C. Derating begins immediately above that point: Fig. 1 shows linear reduction to zero current at 150°C. For reliable 30A operation, maintain case temperature ≤125°C using a heatsink sized per RθJC = 1.4°C/W and ambient thermal management.
Does MBR3045PT require a snubber circuit in high-dV/dt applications?
Not typically-the guard ring die construction and 10,000 V/µs dV/dt rating provide inherent immunity to false triggering under fast transients. Snubbers remain optional for EMI suppression but are not needed for basic functional reliability in properly laid-out 100–500kHz switch-mode circuits.
MBR3045PT 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):
- 30A
- Voltage - Forward (Vf) (Max) @ If:
- 820 mV @ 30 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)
MBR3045PT FAQ
1.How can I place an order for MBR3045PT through Aetrix?
Please submit a Request for Quotation (RFQ) for MBR3045PT 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 MBR3045PT reliable?
The price and inventory of MBR3045PT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MBR3045PT is usually 5 days.
3.What payment methods are accepted for MBR3045PT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MBR3045PT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MBR3045PT?
MBR3045PT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MBR3045PT 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 MBR3045PT?
For technical support, including MBR3045PT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MBR3045PT requirements.
6.How does Aetrix verify that MBR3045PT is sourced from the original manufacturer or authorized distributors?
All MBR3045PT 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 MBR3045PT meets industry standards.
7.What is the process for return or replacement of MBR3045PT?
All MBR3045PT units undergo pre-shipment inspection (PSI). If there is an issue with MBR3045PT, 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 MBR3045PT part is unused and in its original packaging.
Return procedure for MBR3045PT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MBR3045PT Tags
-
BAV99-7-F
Diodes Incorporated
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BAT54C-7-F
Diodes Incorporated
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BAV99,215
Nexperia USA Inc.
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BAT54SLT1G
onsemi
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BAV70LT1G
onsemi
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BAT54CLT1G
onsemi
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BAT54S-7-F
Diodes Incorporated
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BAV99LT1G
onsemi
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BAT54S,215
Nexperia USA Inc.
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BAS40-04LT1G
onsemi
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MMBD1503-TP
Micro Commercial Co
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BAV99WT1G
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