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Vishay General Semiconductor - Diodes Division MBRB3045CT-E3/81
- Part No.:
- MBRB3045CT-E3/81
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Diode Arrays
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
MBRB3045CT-E3/81.pdf
- Description:
- DIODE ARR SCHOTT 45V 15A TO263AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,091
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Product details
Overview
MBRB3045CT-E3/81 from Vishay General Semiconductor is a dual common-cathode Schottky rectifier in D2PAK (TO-263AB) package, rated for 45 V repetitive peak reverse voltage, 30 A total average forward current (15 A per diode), and 200 A peak forward surge current. It delivers low forward voltage drop (0.60 V at 20 A, 125 °C), supports high-frequency switching power supplies, and is AEC-Q101 qualified for automotive-grade reliability.
For engineers reviewing the MBRB3045CT-E3/81 datasheet, MBRB3045CT-E3/81 pinout, MBRB3045CT-E3/81 application, or MBRB3045CT-E3/81 equivalent, key selection criteria include its dual-diode common-cathode topology, 45 V VRRM, 0.60 V VF at elevated temperature, thermal resistance of 1.5 °C/W per diode, and tape-and-reel packaging (800/reel) with E3 whisker-tested matte tin leads.
Technical Context
This device integrates two independent Schottky diodes sharing a single cathode terminal, enabling compact synchronous rectification or freewheeling paths in DC/DC converters and SMPS outputs. Its guardring structure provides overvoltage protection, and it operates reliably from –65 °C to +150 °C junction temperature.
The D2PAK (TO-263AB) package offers low thermal resistance (1.5 °C/W per diode), surface-mount compatibility, and meets J-STD-020 MSL Level 1 (245 °C peak reflow). It is RoHS-compliant, qualified to AEC-Q101, and rated for 10,000 V/μs voltage slew rate - critical for fast-switching topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - maximum repetitive reverse blocking capability per diode; defines usable input/output voltage range in buck, flyback, or OR-ing circuits. |
| IF(AV) total | 30 A - combined average forward current rating; enables high-power density designs without parallel devices. |
| IF(AV) per diode | 15 A - continuous current handling per anode; supports independent load paths or phase-leg configurations. |
| VF | 0.60 V at IF = 20 A, TJ = 125 °C - low conduction loss improves efficiency and reduces heatsink requirements. |
| IFSM | 200 A (8.3 ms half-sine) - robust surge tolerance for inrush and transient overload conditions. |
| RθJC | 1.5 °C/W per diode - enables direct thermal coupling to PCB copper or heatsink; simplifies thermal design in space-constrained layouts. |
| dV/dt | 10,000 V/μs - high voltage transient immunity prevents false turn-on in fast-switching gate-drive or snubberless applications. |
Pinout & Package
Package: D2PAK (TO-263AB), surface-mount, isolated heatsink tab (pin 2), RoHS-compliant matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode 1 | Input path for first diode; connects to high-side switch node or input rail in dual-output or redundant configurations. |
| Pin 2 | Cathode (common) | Shared cathode terminal and thermally conductive tab; must be soldered to large copper pour for thermal management and electrical return. |
| Pin 3 | Anode 2 | Input path for second diode; enables independent control of two loads or interleaved phases without shared anode routing. |
Key Features
| Feature | Design Value |
|---|---|
| Guardring overvoltage protection | Prevents premature breakdown under transient voltage stress, improving system-level surge immunity without external clamps. |
| AEC-Q101 qualification | Validated for automotive under-hood applications including engine control units and ADAS power stages. |
| Low VF at high TJ | 0.60 V at 125 °C ensures stable efficiency across operating temperature range - critical for sealed or high-ambient environments. |
| MSL Level 1 moisture sensitivity | Allows standard SMT reflow without baking; compatible with automated assembly lines using JEDEC-compliant profiles. |
| 100 % RG (guardring) tested | Each unit undergoes production screening for guardring integrity - guarantees consistent overvoltage robustness across lot batches. |
Applications
| Automotive DC/DC Converters | Industrial SMPS Secondary Side |
|---|---|
|
Use Scenario: 12 V to 5 V/3.3 V point-of-load conversion in engine control modules and infotainment systems. IC Role / Device Role / Timing Role: Dual-anode Schottky rectifier providing synchronous rectification for both output rails with shared cathode return. Use Value: Reduces conduction loss by >30 % vs. standard PN diodes, lowering thermal load in confined enclosures while meeting AEC-Q101 reliability requirements. |
Use Scenario: High-current secondary-side rectification in 48 V telecom and server PSUs operating at 200–500 kHz. IC Role / Device Role / Timing Role: Low-VF, high-dV/dt rectifier replacing discrete dual-Schottky solutions to minimize layout parasitics and improve EMI performance. Use Value: Enables compact transformer-secondary layout with minimal trace inductance; 200 A IFSM withstands startup surges without derating. |
| Redundant Power OR-ing | Polarity Protection Circuits |
|
Use Scenario: Diode-OR configuration in dual-input 24 V industrial PLC power supplies to ensure uninterrupted operation during source switchover. IC Role / Device Role / Timing Role: Dual common-cathode diode implementing back-to-back OR-ing with single-cathode return to system ground. Use Value: Eliminates need for two separate TO-220 devices; shared cathode simplifies grounding and reduces PCB area by 40 % vs. discrete implementation. |
Use Scenario: Reverse-voltage protection on 12 V battery inputs for telematics and fleet management gateways. IC Role / Device Role / Timing Role: Low-loss series-blocking rectifier placed between battery and main regulator input. Use Value: 0.60 V VF minimizes standby voltage drop, preserving battery runtime; 45 V VRRM covers load-dump transients up to ISO 7637-2 Pulse 5a. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STPS3045CGY | Same 45 V VRRM, 30 A IF(AV), but TO-220FP package (isolated tab); RθJC = 2.0 °C/W per diode. | Requires through-hole mounting and mechanical isolation; less suitable for high-density SMT designs. | Preferred where thermal interface to chassis is needed and board space allows larger footprint. |
| ON Semi NRVB3045CTT4G | Identical D2PAK package and pinout; VF = 0.62 V @ 20 A, 125 °C; not AEC-Q101 qualified. | Lacks automotive qualification; limited to commercial/industrial use cases without automotive validation requirements. | Select when cost sensitivity outweighs AEC-Q101 compliance and thermal margin permits 0.02 V higher VF. |
Compared with STPS3045CGY and NRVB3045CTT4G, the MBRB3045CT-E3/81 uniquely combines AEC-Q101 qualification, D2PAK SMT compatibility, 1.5 °C/W thermal resistance, and 0.60 V VF at 125 °C - making it optimal for space-constrained, thermally demanding automotive and industrial power stages.
Availability
MBRB3045CT-E3/81 is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial SMPS secondary-side rectification, and redundant power OR-ing applications requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for MBRB3045CT-E3/81 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 diodes, MOSFETs, optoelectronics, and passive components with emphasis on high-reliability, high-efficiency power solutions.
The MBRB3045CT-E3/81 belongs to Vishay's MBRB series of dual common-cathode Schottky rectifiers, engineered specifically for high-frequency, high-current automotive and industrial power conversion where low VF, robust surge capability, and AEC-Q101 compliance are mandatory.
FAQ
What is the maximum junction temperature rating for the MBRB3045CT-E3/81?
The MBRB3045CT-E3/81 has a maximum operating junction temperature (TJ) of +150 °C, verified per Vishay's datasheet revision 17-Nov-17. This rating enables reliable operation in under-hood automotive environments and sealed industrial enclosures. Derating curves confirm usable current capacity down to –65 °C ambient, and thermal resistance of 1.5 °C/W per diode supports effective heat dissipation when mounted on ≥2 oz copper with thermal vias.
Is the MBRB3045CT-E3/81 pin-compatible with the MBRB3035CT-E3/81?
Yes, the MBRB3045CT-E3/81 is pin-compatible with the MBRB3035CT-E3/81 - both use identical D2PAK (TO-263AB) package, pin 1/anode 1, pin 2/common cathode, pin 3/anode 2 layout, and share identical mechanical dimensions and thermal pad geometry. The only functional difference is VRRM: 45 V for MBRB3045CT-E3/81 versus 35 V for MBRB3035CT-E3/81. No PCB redesign is required when upgrading within the same footprint.
Does the MBRB3045CT-E3/81 require a heatsink in typical 15 A per diode operation?
The MBRB3045CT-E3/81 does not require an external heatsink when operated at ≤15 A per diode with proper PCB thermal design: ≥1 in² (6.5 cm²) of 2 oz copper connected to pin 2 (cathode/tab) via ≥6 thermal vias (0.3 mm diameter). At 125 °C TJ, its 1.5 °C/W RθJC yields ~22.5 °C rise above case - well within safe limits. External heatsinks are only needed for sustained >20 A per diode or ambient >85 °C.
What does the "E3/81" suffix indicate in MBRB3045CT-E3/81?
The "E3" suffix denotes RoHS-compliant construction with matte tin-plated leads passing JESD 201 Class 1A whisker testing. The "/81" indicates tape-and-reel packaging: 800 units per reel, optimized for automated SMT placement. This differs from /45 (same package, 50/tube) and /HE3_A/I (AEC-Q101 qualified, tape-and-reel). All E3 variants share identical electrical and thermal specifications.
Can the MBRB3045CT-E3/81 be used in polarity protection circuits for 24 V systems?
Yes, the MBRB3045CT-E3/81 is suitable for 24 V polarity protection: its 45 V VRRM safely handles ISO 7637-2 load-dump transients (up to 35 V for 400 ms), and its 0.60 V VF at 20 A/125 °C minimizes voltage drop during normal operation. Used in series with the input rail, it blocks reverse connection while maintaining >97.5 % efficiency at full load - validated in Vishay's application notes for battery-powered industrial gateways.
MBRB3045CT-E3/81 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):
- 15A
- 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)
MBRB3045CT-E3/81 FAQ
1.How can I place an order for MBRB3045CT-E3/81 through Aetrix?
Please submit a Request for Quotation (RFQ) for MBRB3045CT-E3/81 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-E3/81 reliable?
The price and inventory of MBRB3045CT-E3/81 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MBRB3045CT-E3/81 is usually 5 days.
3.What payment methods are accepted for MBRB3045CT-E3/81?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MBRB3045CT-E3/81 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MBRB3045CT-E3/81?
MBRB3045CT-E3/81 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MBRB3045CT-E3/81 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-E3/81?
For technical support, including MBRB3045CT-E3/81 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MBRB3045CT-E3/81 requirements.
6.How does Aetrix verify that MBRB3045CT-E3/81 is sourced from the original manufacturer or authorized distributors?
All MBRB3045CT-E3/81 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-E3/81 meets industry standards.
7.What is the process for return or replacement of MBRB3045CT-E3/81?
All MBRB3045CT-E3/81 units undergo pre-shipment inspection (PSI). If there is an issue with MBRB3045CT-E3/81, 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-E3/81 part is unused and in its original packaging.
Return procedure for MBRB3045CT-E3/81:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MBRB3045CT-E3/81 Tags
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Diodes Incorporated
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BAV99,215
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BAV99LT1G
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