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Vishay General Semiconductor - Diodes Division MBRB4045CTTRR
- Part No.:
- MBRB4045CTTRR
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Diode Arrays
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
MBRB4045CTTRR.pdf
- Description:
- DIODE ARR SCHOTT 45V 20A TO263AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,162
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Product details
Overview
MBRB4045CTTRR from Vishay is a dual common-cathode Schottky rectifier in D2PAK (TO-263) package, rated for 2 × 20 A average forward current per leg and 45 V reverse voltage, with 0.58 V forward voltage at 20 A and 125 °C junction temperature-optimized for high-frequency switching power supplies and reverse battery protection circuits.
For engineers reviewing the MBRB4045CTTRR datasheet, MBRB4045CTTRR pinout, MBRB4045CTTRR application, or MBRB4045CTTRR equivalent, key selection criteria include thermal resistance (1.5 °C/W per leg), low IRM (95 mA at 125 °C), rugged guard-ring construction, Q101 qualification, and D2PAK mounting compatibility with standard heatsinks.
Technical Context
This center-tap Schottky rectifier uses proprietary barrier technology enabling stable operation up to 150 °C junction temperature while maintaining low forward voltage and low reverse leakage. Its dual-anode/common-cathode configuration supports independent leg conduction with shared cathode termination.
Designed for high-frequency DC/DC conversion, it delivers fast recovery (no minority carrier storage), high dV/dt capability (10,000 V/µs), and low junction capacitance (900 pF at 5 V), making it suitable for synchronous rectification and freewheeling in compact, thermally constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) per leg | 20 A at TC = 118 °C - supports continuous high-current output stage conduction without derating in well-heatsinked layouts |
| VRRM | 45 V - defines maximum blocking voltage in reverse-biased operation; sufficient for 36 V automotive and 24 V industrial bus systems |
| VF @ 20 A, 125 °C | 0.58 V - enables <11.6 W conduction loss per leg, reducing thermal load in high-efficiency SMPS |
| IRM @ 125 °C | 95 mA - low leakage preserves efficiency and stability in high-temperature environments like engine compartments |
| RthJC per leg | 1.5 °C/W - allows direct thermal path to heatsink; enables >30 W power dissipation per leg before reaching 150 °C TJ limit |
| TJ range | –65 to +150 °C - qualified for under-hood automotive and industrial ambient conditions without derating |
| Package | D2PAK (TO-263) - surface-mount variant with exposed thermal pad for PCB-level heat spreading and automated assembly compatibility |
Pinout & Package
D2PAK (TO-263) package with exposed copper thermal pad on underside; three terminals: two anodes (pins 1 and 2) and one common cathode (pin 3, electrically connected to thermal pad).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode (Leg 1) | Input terminal for first Schottky diode leg; connects to switching node or input rail in dual-path topologies |
| Pin 2 | Anode (Leg 2) | Input terminal for second independent Schottky leg; enables dual-input or interleaved converter configurations |
| Pin 3 / Thermal Pad | Common Cathode | Shared output node and primary thermal interface; must be soldered to large copper pour for effective heat extraction |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Enhances edge breakdown immunity and long-term reliability under repetitive surge stress (IFSM = 900 A) |
| Q101 qualification | Meets AEC-Q101 stress test requirements for discrete semiconductors in automotive applications |
| High-purity epoxy encapsulation | Provides superior moisture resistance and mechanical robustness in humid or vibration-prone environments |
| Low series inductance | 8.0 nH typical - minimizes voltage overshoot during fast switching transitions in high-dI/dt circuits |
| Center-tap dual-diode topology | Enables compact layout for dual-output or redundant freewheeling paths without discrete component duplication |
Applications
| Automotive DC/DC Converters | Industrial Switch-Mode Power Supplies |
|---|---|
Use Scenario: Step-down conversion from 48 V battery to 12 V auxiliary rail in EV/HEV power distribution units. IC Role / Device Role / Timing Role: Dual-leg Schottky rectifier providing synchronous rectification and freewheeling in interleaved buck converters. Use Value: Low VF and high TJ rating reduce conduction losses and eliminate need for active cooling in space-constrained under-hood modules. | Use Scenario: High-efficiency 24 V output stage in programmable logic controller (PLC) power supplies. IC Role / Device Role / Timing Role: Output rectifier handling peak currents up to 40 A combined, operating continuously at 70 °C ambient. Use Value: 1.5 °C/W RthJC and Q101 qualification ensure stable performance across extended industrial temperature cycles and shock/vibe profiles. |
| Reverse Battery Protection | Telecom Rectifier Modules |
Use Scenario: Preventing damage from accidental reverse polarity connection in vehicle infotainment head units. IC Role / Device Role / Timing Role: Low-loss series-blocking element placed between battery input and system ground return path. Use Value: 0.58 V VF at 20 A limits insertion loss to <12 W, avoiding thermal runaway during sustained fault conditions. | Use Scenario: +48 V telecom rectifier output stage delivering up to 20 A per channel in distributed power architecture. IC Role / Device Role / Timing Role: Dual-channel output rectifier supporting parallel or redundant 48 V/20 A outputs with shared cathode return. Use Value: 900 pF CT and 10,000 V/µs dV/dt support clean turn-off in high-frequency (>300 kHz) ZVS/ZCS topologies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay MBR4045CT | Same die, TO-220AB package - no thermal pad, higher RthJA (50 °C/W), through-hole mounting | Suitable for prototyping or lower-power lab supplies where heatsinking is less critical | Select MBR4045CT only when manual assembly or legacy TO-220 footprint is required; MBRB4045CTTRR preferred for volume SMT production |
| ON Semiconductor MURB4045CT | 45 V, 2 × 20 A Schottky; slightly higher VF (0.62 V @ 20 A, 125 °C); same D2PAK package and pinout | Compatible in most 48 V automotive and industrial rectifier roles but requires validation of IRM and thermal margin | MURB4045CT offers second-source availability; verify junction temperature rise under actual load before drop-in replacement |
Compared with MBR4045CT (TO-220) and MURB4045CT (D2PAK), MBRB4045CTTRR provides the lowest thermal resistance among the three and is optimized for automated SMT assembly, while maintaining identical electrical ratings and Q101 compliance.
Availability
MBRB4045CTTRR is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial switch-mode power supplies, and reverse battery protection circuits requiring stable component supply, AEC-Q101 qualification, and D2PAK surface-mount compatibility.
Supply support for MBRB4045CTTRR 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
Vishay Intertechnology is a global manufacturer of discrete semiconductors and passive components, specializing in high-reliability power devices, sensors, and resistive solutions.
The MBRB4045CTTRR belongs to Vishay's High Power Products Schottky rectifier family, engineered for high-current, high-temperature switching applications in automotive, industrial, and telecom infrastructure where low VF, ruggedness, and Q101 compliance are mandatory.
FAQ
What is the maximum junction temperature rating for MBRB4045CTTRR?
The MBRB4045CTTRR has a maximum junction temperature (TJ) rating of +150 °C, validated per AEC-Q101 stress testing. This allows reliable operation in under-hood automotive environments and high-ambient industrial settings. The device maintains specified VF and IRM performance up to this limit, provided thermal design respects the 1.5 °C/W RthJC per leg and proper heatsinking is implemented. MBRB4045CTTRR must not exceed 150 °C TJ in continuous operation.
Is MBRB4045CTTRR pin-compatible with MBR4045CT?
No, MBRB4045CTTRR is not pin-compatible with MBR4045CT. MBRB4045CTTRR uses the D2PAK (TO-263) surface-mount package with three leads and an exposed thermal pad, while MBR4045CT uses the through-hole TO-220AB package with three leads and no thermal pad. Their footprints, mounting methods, and thermal interface requirements differ fundamentally. MBRB4045CTTRR requires reflow-soldered PCB layout; MBR4045CT requires through-hole soldering and clip-on heatsinks.
Does MBRB4045CTTRR support automotive qualification standards?
Yes, MBRB4045CTTRR is designed and qualified to AEC-Q101 standards for discrete semiconductors. It undergoes rigorous stress testing-including temperature cycling, humidity bias, and high-temperature reverse bias-to ensure reliability in automotive applications such as engine control units, body electronics, and ADAS power supplies. The device marking "MBRB4045CTTRR" indicates full Q101 compliance per Vishay documentation.
What is the forward voltage drop of MBRB4045CTTRR at 40 A total current?
At 40 A total current (20 A per leg), MBRB4045CTTRR exhibits a forward voltage drop of 0.75 V per leg at TJ = 125 °C. This value is measured under DC or low-duty-cycle conditions and reflects real-world conduction loss in high-load scenarios. At room temperature (25 °C), VF rises to 0.78 V per leg at 40 A. These values directly determine power dissipation: ~15 W per leg at 125 °C, requiring appropriate thermal management.
Can MBRB4045CTTRR be used in reverse battery protection circuits?
Yes, MBRB4045CTTRR is commonly deployed in reverse battery protection circuits due to its low forward voltage (0.58 V at 20 A, 125 °C), high surge capability (900 A IFSM), and rugged guard-ring construction. When placed in series with the positive battery line, it blocks reverse polarity while minimizing insertion loss and self-heating. Its 45 V VRRM rating covers standard 36 V nominal systems, and Q101 qualification ensures robustness against automotive load dump transients.
MBRB4045CTTRR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io) (per Diode):
- 20A
- Voltage - Forward (Vf) (Max) @ If:
- 600 mV @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 mA @ 45 V
- Operating Temperature - Junction:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263AB (D2PAK)
MBRB4045CTTRR FAQ
1.How can I place an order for MBRB4045CTTRR through Aetrix?
Please submit a Request for Quotation (RFQ) for MBRB4045CTTRR 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 MBRB4045CTTRR reliable?
The price and inventory of MBRB4045CTTRR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MBRB4045CTTRR is usually 5 days.
3.What payment methods are accepted for MBRB4045CTTRR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MBRB4045CTTRR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MBRB4045CTTRR?
MBRB4045CTTRR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MBRB4045CTTRR 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 MBRB4045CTTRR?
For technical support, including MBRB4045CTTRR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MBRB4045CTTRR requirements.
6.How does Aetrix verify that MBRB4045CTTRR is sourced from the original manufacturer or authorized distributors?
All MBRB4045CTTRR 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 MBRB4045CTTRR meets industry standards.
7.What is the process for return or replacement of MBRB4045CTTRR?
All MBRB4045CTTRR units undergo pre-shipment inspection (PSI). If there is an issue with MBRB4045CTTRR, 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 MBRB4045CTTRR part is unused and in its original packaging.
Return procedure for MBRB4045CTTRR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MBRB4045CTTRR Tags
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BAT54C-7-F
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BAV99,215
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BAT54SLT1G
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BAV70LT1G
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BAT54S-7-F
Diodes Incorporated
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BAV99LT1G
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BAT54S,215
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