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Vishay General Semiconductor - Diodes Division MBRB3045CT
- Part No.:
- MBRB3045CT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Diode Arrays
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
MBRB3045CT.pdf
- Description:
- DIODE ARR SCHOTT 45V 15A TO263AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,207
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Product details
Overview
MBRB3045CT from Vishay General Semiconductor is a dual common-cathode Schottky rectifier in TO-263AB package, rated for 45 V repetitive peak reverse voltage, 15 A average forward current per diode, and 200 A non-repetitive surge current. It delivers low 0.60 V forward voltage at 20 A and 125 °C junction temperature, enabling high-efficiency operation in DC-DC converters and switching power supplies.
For engineers reviewing the MBRB3045CT datasheet, MBRB3045CT pinout, MBRB3045CT application, or MBRB3045CT equivalent, key selection criteria include its dual-diode configuration with shared cathode, TO-263AB thermal resistance of 1.5 °C/W per diode, RoHS compliance, and suitability for high-frequency freewheeling and polarity protection circuits requiring low conduction loss.
Technical Context
The MBRB3045CT integrates two independent Schottky diodes sharing a common cathode terminal (Pin 2), enabling compact dual-channel rectification without external interconnection. Its guardring structure provides overvoltage protection, while the TO-263AB package supports surface-mount assembly with heatsink-compatible exposed cathode pad.
Designed for operation up to 150 °C junction temperature, it exhibits stable reverse leakage (1.0 mA at 25 °C, 60 mA at 125 °C) and high dV/dt capability (10,000 V/µs), making it suitable for fast-switching topologies where rapid voltage transients occur across the diode terminals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum repetitive reverse blocking voltage per diode; defines safe operating limit in flyback or buck-boost output stages. |
| IF(AV) per diode | 15 A - Continuous forward current rating per diode at 25 °C case temperature; determines thermal derating in power supply designs. |
| VF @ 20 A, 25 °C | 0.60 V - Low forward drop reduces conduction losses and improves system efficiency in high-current paths. |
| IFSM | 200 A - Peak surge current handling for 8.3 ms half-sine; supports robust startup and fault transient tolerance. |
| RθJC per diode | 1.5 °C/W - Junction-to-case thermal resistance in TO-263AB; enables direct heatsinking for high-power density layouts. |
| TJ max. | 150 °C - Maximum allowable junction temperature; sets upper boundary for thermal design margin in enclosed environments. |
Pinout & Package
Package: TO-263AB (D²PAK), surface-mount, isolated heatsink tab (cathode), matte tin-plated leads, UL 94V-0 epoxy.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode 1 | Input terminal for first Schottky diode; connects to switching node or input rail in synchronous rectifier or freewheel path. |
| Pin 2 | Common Cathode | Shared output terminal for both diodes; electrically connected to heatsink tab and serves as main power return path. |
| Pin 3 | Anode 2 | Input terminal for second Schottky diode; enables dual independent rectification or parallel anode configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Guardring overvoltage protection | Enhances ruggedness against voltage spikes in inductive load switching, reducing risk of avalanche-induced failure. |
| Low VF at high current | 0.60 V @ 20 A ensures <12 W conduction loss per diode at full load, critical for thermally constrained PCBs. |
| High IFSM | 200 A surge rating supports reliable operation during inrush or short-circuit events without bond-wire fusing. |
| TO-263AB thermal performance | 1.5 °C/W RθJC allows >20 W dissipation with 30 °C rise to heatsink, enabling compact high-power designs. |
Applications
| Switching Power Supply Output Rectification | DC-DC Converter Freewheeling Diode |
|---|---|
Use Scenario: Used in secondary-side synchronous or asynchronous rectification of 12 V or 5 V outputs in AC-DC adapters and server PSUs. IC Role / Device Role / Timing Role: Dual common-cathode Schottky rectifier providing low-loss unidirectional current path during transformer demagnetization. Use Value: 0.60 V forward drop minimizes conduction loss at 15 A per diode, improving overall converter efficiency by ~1.5–2.0% versus standard silicon diodes. | Use Scenario: Mounted across inductor in buck or boost converters to provide continuous current path during high-side switch off-time. IC Role / Device Role / Timing Role: Fast-recovery freewheeling diode conducting during the off-phase of PWM cycle, minimizing voltage overshoot and EMI. Use Value: 10,000 V/µs dV/dt rating ensures stable operation under rapid voltage transitions, reducing snubber requirements and layout sensitivity. |
| Polarity Protection Circuit | Automotive Body Control Module Input Stage |
Use Scenario: Placed in series with main power input to prevent damage from reverse battery connection in industrial controllers. IC Role / Device Role / Timing Role: Reverse-polarity blocking diode using common-cathode configuration to protect downstream circuitry with minimal forward drop penalty. Use Value: Dual-diode structure allows redundant or split-rail protection schemes; 45 V VRRM covers 24 V automotive and 36 V industrial nominal systems. | Use Scenario: Integrated into 12 V input stage of BCMs for lighting, window lift, or seat control modules. IC Role / Device Role / Timing Role: High-surge-capable rectifier handling load-dump transients and cold-crank conditions while maintaining low conduction loss. Use Value: AEC-Q101 qualified HE3 suffix variant available; 200 A IFSM withstands ISO 7637-2 Pulse 5a (load dump) without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STPS3045CG | Same 45 V VRRM, 15 A IF(AV), TO-263AB package, but RθJC = 2.0 °C/W (vs. 1.5 °C/W for MBRB3045CT). | Lower thermal performance limits maximum continuous power in space-constrained heatsink designs. | Select when STMicroelectronics sourcing preference applies and thermal margin exceeds 10 °C. |
| ON Semi MBR3045CT | Identical electrical ratings and TO-220AB through-hole package; no common-cathode pinout compatibility with MBRB3045CT's surface-mount TO-263AB layout. | Requires PCB redesign due to different footprint, mounting, and thermal interface; not drop-in replaceable. | Choose only if through-hole assembly is mandated and board rework is acceptable. |
Compared with STPS3045CG and MBR3045CT, the MBRB3045CT offers superior thermal resistance (1.5 vs. 2.0 °C/W) and surface-mount compatibility, making it optimal for high-density, thermally demanding DC-DC and automotive power stages where layout efficiency and thermal headroom are critical.
Availability
MBRB3045CT is available at Aetrix Electronics and suitable for switching power supplies, DC-DC converters, and automotive body control modules requiring stable component supply and long-term production continuity.
Supply support for MBRB3045CT 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 General Semiconductor is a global leader in discrete semiconductors, specializing in power rectifiers, MOSFETs, and optoelectronics with emphasis on reliability, thermal performance, and AEC-Q101 qualification.
The MBRB3045CT belongs to Vishay's MBR(F,B)30xxCT family of dual Schottky rectifiers engineered for high-efficiency, high-frequency power conversion in automotive, industrial, and computing applications.
FAQ
What is the pin configuration of the MBRB3045CT?
The MBRB3045CT uses a three-pin TO-263AB package with Pin 1 as Anode 1, Pin 2 as Common Cathode (connected to heatsink tab), and Pin 3 as Anode 2. This dual-common-cathode arrangement enables independent control of two rectification paths sharing one output node, simplifying PCB routing in dual-output or redundancy designs.
Does the MBRB3045CT meet automotive reliability standards?
Yes - the MBRB3045CTHE3/81 variant is AEC-Q101 qualified and meets JESD201 Class 2 whisker test requirements. While the base MBRB3045CT is consumer-grade (E3), the HE3 suffix denotes high-reliability qualification, making it suitable for under-hood automotive applications including body control modules and infotainment power supplies.
What is the maximum junction temperature for the MBRB3045CT?
The MBRB3045CT has a maximum junction temperature (TJ) of +150 °C, verified per Vishay Document 88677. This rating allows operation in high-ambient environments such as enclosed power enclosures or engine-bay-mounted electronics, provided thermal design maintains junction temperature below this limit under worst-case load and ambient conditions.
How does the MBRB3045CT compare to the MBR3045CT in terms of package and mounting?
The MBRB3045CT uses a surface-mount TO-263AB (D²PAK) package with heatsink tab on the bottom side, while the MBR3045CT uses through-hole TO-220AB. They share identical electrical specifications (45 V, 15 A per diode), but the MBRB3045CT requires reflow soldering and PCB copper pour for thermal management, whereas the MBR3045CT uses screw-mount heatsinks and wave soldering.
What is the typical forward voltage drop of the MBRB3045CT at rated current?
The MBRB3045CT exhibits a typical forward voltage drop of 0.60 V at 20 A and 25 °C case temperature, rising to 0.72 V at 30 A and 125 °C. This low VF is confirmed in Vishay Document 88677 and directly contributes to reduced conduction losses in high-current DC-DC converter outputs and freewheeling paths.
MBRB3045CT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tube
- Product Status:
- Obsolete
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io) (per Diode):
- 15A
- Voltage - Forward (Vf) (Max) @ If:
- 760 mV @ 30 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)
MBRB3045CT FAQ
1.How can I place an order for MBRB3045CT through Aetrix?
Please submit a Request for Quotation (RFQ) for MBRB3045CT 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 MBRB3045CT reliable?
The price and inventory of MBRB3045CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MBRB3045CT is usually 5 days.
3.What payment methods are accepted for MBRB3045CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MBRB3045CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MBRB3045CT?
MBRB3045CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MBRB3045CT 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 MBRB3045CT?
For technical support, including MBRB3045CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MBRB3045CT requirements.
6.How does Aetrix verify that MBRB3045CT is sourced from the original manufacturer or authorized distributors?
All MBRB3045CT 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 MBRB3045CT meets industry standards.
7.What is the process for return or replacement of MBRB3045CT?
All MBRB3045CT units undergo pre-shipment inspection (PSI). If there is an issue with MBRB3045CT, 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 MBRB3045CT part is unused and in its original packaging.
Return procedure for MBRB3045CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MBRB3045CT Tags
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BAV99,215
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BAT54S-7-F
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BAV99LT1G
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BAT54S,215
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