My Inquiry
My Account
Vishay General Semiconductor - Diodes Division MBRB2545CT-E3/81
- Part No.:
- MBRB2545CT-E3/81
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Diode Arrays
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
MBRB2545CT-E3/81.pdf
- Description:
- DIODE ARR SCHOTT 45V 15A TO263AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,544
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MBRB2545CT-E3/81 from Vishay General Semiconductor is a dual common-cathode Schottky rectifier in TO-220AB package, rated for 45 V repetitive peak reverse voltage, 25 A total average forward current (12.5 A per diode), and 150 A peak surge current. It delivers 0.73 V forward voltage at 30 A and 125 °C, enabling high-efficiency low-voltage DC/DC conversion in power supplies.
For engineers reviewing the MBRB2545CT-E3/81 datasheet, MBRB2545CT-E3/81 pinout, MBRB2545CT-E3/81 application, or MBRB2545CT-E3/81 equivalent, key selection criteria include its dual common-cathode topology, 1.5 °C/W junction-to-case thermal resistance, guardring-enhanced overvoltage protection, and RoHS-compliant matte tin-plated leads solderable per J-STD-002.
Technical Context
This device integrates two independent Schottky diodes sharing a common cathode terminal, optimized for high-frequency switching applications where low forward voltage and fast recovery are critical. Its guardring structure provides enhanced ruggedness against transient overvoltage events without compromising soft recovery behavior.
The TO-220AB package enables direct heatsink mounting with ≤10 in-lbs torque, supporting continuous operation up to 150 °C junction temperature. Thermal resistance of 1.5 °C/W per diode allows effective power dissipation under high-current DC/DC converter freewheeling conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum repetitive reverse blocking capability per diode, suitable for 36 V nominal bus systems with margin |
| IF(AV) | 25 A total / 12.5 A per diode - Continuous rectified current rating at TC = 130 °C, defining heatsink sizing requirements |
| IFSM | 150 A - Peak non-repetitive surge current per diode (8.3 ms half-sine), supporting startup and fault transients |
| VF | 0.73 V at 30 A, 125 °C - Low conduction loss directly reducing power stage inefficiency in high-current buck converters |
| RθJC | 1.5 °C/W per diode - Enables precise junction temperature estimation when mounted to heatsink with known thermal interface resistance |
| TJ max. | 150 °C - Maximum allowable junction temperature, setting upper limit for thermal design margin in enclosed environments |
Pinout & Package
TO-220AB package with isolated metal tab (cathode-connected), 3-terminal configuration: Pin 1 = Anode 1, Pin 2 = Cathode (common), Pin 3 = Anode 2. Mounting hole centered on tab supports mechanical stability and thermal transfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode of Diode 1 | Input terminal for first rectification path; connects to high-side switch node in synchronous buck topologies |
| Pin 2 | Common Cathode | Shared output node for both diodes; electrically tied to heatsink mount surface and must be isolated if heatsink is grounded |
| Pin 3 | Anode of Diode 2 | Input terminal for second rectification path; used in interleaved or dual-output configurations |
Key Features
| Feature | Design Value |
|---|---|
| Guardring overvoltage protection | Enables reliable operation under 25 kV ESD (HBM) and 10,000 V/μs dV/dt stress without avalanche degradation |
| Low forward voltage drop | 0.73 V @ 30 A / 125 °C reduces conduction losses by ≥15% vs. comparable silicon rectifiers in 12–48 V systems |
| High surge capability | 150 A IFSM per diode supports >3× rated current during cold-start or short-circuit recovery in SMPS |
| RoHS-compliant matte tin plating | Meets JESD22-B102 solderability and JESD201 Class 1A whisker resistance for long-term reliability in industrial assemblies |
Applications
| Switching Mode Power Supply Output Rectification | DC/DC Converter Freewheeling Diode |
|---|---|
Use Scenario: Secondary-side rectification in 24 V/36 V offline or intermediate bus SMPS delivering up to 25 A total output. IC Role / Device Role / Timing Role: Dual Schottky rectifier providing low-loss unidirectional current path during high-frequency PWM cycles. Use Value: 0.73 V VF at full load minimizes conduction loss, improving overall efficiency by 1–2% compared to standard silicon diodes. | Use Scenario: Freewheeling path in synchronous buck converters powering FPGA or ASIC core rails (e.g., 1.2 V @ 100 A). IC Role / Device Role / Timing Role: Fast-recovery freewheeling element conducting during low-side switch off-time in high-frequency (≥300 kHz) topologies. Use Value: Guardring-enhanced ruggedness prevents failure during rapid dI/dt transitions and voltage overshoots at switch node. |
| Polarity Protection Circuit | Redundant Power OR-ing |
Use Scenario: Reverse-voltage blocking in 12–48 V input stages of industrial controllers or PoE-powered devices. IC Role / Device Role / Timing Role: Common-cathode dual diode configured as back-to-back anode inputs for bidirectional input protection. Use Value: 45 V VRRM provides sufficient margin above 36 V nominal rails while maintaining low forward drop during normal operation. | Use Scenario: OR-ing two independent 24 V power sources (e.g., primary + backup) feeding a shared load in telecom shelf systems. IC Role / Device Role / Timing Role: Dual-anode configuration enables independent source selection with shared cathode output node. Use Value: Matched VF characteristics between diodes ensure balanced current sharing and prevent reverse bias of inactive source. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay MBR2545CT-E3/45 | Same die, identical electrical specs, but packaged in tube (not tape-and-reel); differs only in packaging suffix and delivery mode | No functional difference; suitable for same PCB layout and thermal design | Select MBRB2545CT-E3/81 for tape-and-reel automated assembly; choose MBR2545CT-E3/45 for manual or low-volume prototyping |
| ON Semiconductor MURB2545CT | Higher VF (0.85 V @ 30 A), lower IFSM (120 A), same TO-220AB package and pinout | Acceptable for lower-efficiency or lower-surge designs; requires re-evaluation of thermal margin due to higher conduction loss | Use only if MBRB2545CT-E3/81 is unavailable; verify junction temperature rise and surge margin in final design |
Compared with MBRB2545CT-E3/81, MBR2545CT-E3/45 offers identical performance in a different packaging format, while MURB2545CT trades 0.12 V higher forward drop and 30 A lower surge rating for potential cost or supply-chain flexibility-neither is pin-compatible nor drop-in without validation.
Availability
MBRB2545CT-E3/81 is available at Aetrix Electronics and suitable for switching mode power supplies, DC/DC converters, and polarity protection circuits requiring stable component supply, consistent thermal performance, and RoHS-compliant manufacturing.
Supply support for MBRB2545CT-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, rectifiers, MOSFETs, and optoelectronics with emphasis on power efficiency and ruggedness.
The MBR25xxCT family targets high-current, low-voltage rectification in industrial and telecom power systems, designed to replace conventional silicon rectifiers with Schottky technology for improved efficiency and thermal performance.
FAQ
What is the maximum junction temperature rating for MBRB2545CT-E3/81?
The MBRB2545CT-E3/81 has a maximum operating junction temperature of +150 °C. This rating defines the upper thermal limit for reliable operation and must be validated against actual board-level thermal conditions using its 1.5 °C/W junction-to-case thermal resistance. Derating curves in the Vishay datasheet show that average forward current drops to 25 A only at case temperature of 130 °C, requiring appropriate heatsinking to maintain safe TJ under full load.
Does MBRB2545CT-E3/81 support surface-mount assembly?
No, MBRB2545CT-E3/81 uses a through-hole TO-220AB package with three leads and an isolated metal tab, intended for socketed or screw-mounted heatsink installation. It is not compatible with reflow or wave soldering processes designed for SMD components. The device requires mechanical mounting torque ≤10 in-lbs and thermal interface material between tab and heatsink for optimal performance.
What does the "-E3/81" suffix indicate in MBRB2545CT-E3/81?
The "-E3" denotes Vishay's RoHS-compliant, commercial-grade variant with matte tin-plated leads meeting J-STD-002 solderability and JESD201 Class 1A whisker resistance. The "/81" suffix specifies tape-and-reel packaging (50 units per reel), distinguishing it from tube-packaged variants like MBR2545CT-E3/45. Both share identical electrical and thermal specifications.
How does the guardring feature improve reliability of MBRB2545CT-E3/81?
The integrated guardring in MBRB2545CT-E3/81 enhances edge termination robustness, preventing premature avalanche breakdown during voltage transients. It enables the device to withstand 25 kV HBM ESD and sustain 10,000 V/μs dV/dt without degradation-critical for operation in noisy industrial environments or near switching nodes. This structural feature directly extends operational lifetime under real-world overvoltage stress.
Can MBRB2545CT-E3/81 be used in parallel configurations for higher current?
MBRB2545CT-E3/81 is not recommended for direct parallel connection without external balancing-its VF mismatch across diodes can cause current hogging. For >25 A applications, use multiple discrete devices with individual current-sharing resistors or select higher-rated alternatives. The dual common-cathode architecture supports interleaved or redundant topologies, but per-diode current must remain within 12.5 A average rating to avoid thermal runaway.
MBRB2545CT-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:
- 820 mV @ 30 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 200 µA @ 45 V
- Operating Temperature - Junction:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263AB (D2PAK)
MBRB2545CT-E3/81 FAQ
1.How can I place an order for MBRB2545CT-E3/81 through Aetrix?
Please submit a Request for Quotation (RFQ) for MBRB2545CT-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 MBRB2545CT-E3/81 reliable?
The price and inventory of MBRB2545CT-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 MBRB2545CT-E3/81 is usually 5 days.
3.What payment methods are accepted for MBRB2545CT-E3/81?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MBRB2545CT-E3/81 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MBRB2545CT-E3/81?
MBRB2545CT-E3/81 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MBRB2545CT-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 MBRB2545CT-E3/81?
For technical support, including MBRB2545CT-E3/81 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MBRB2545CT-E3/81 requirements.
6.How does Aetrix verify that MBRB2545CT-E3/81 is sourced from the original manufacturer or authorized distributors?
All MBRB2545CT-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 MBRB2545CT-E3/81 meets industry standards.
7.What is the process for return or replacement of MBRB2545CT-E3/81?
All MBRB2545CT-E3/81 units undergo pre-shipment inspection (PSI). If there is an issue with MBRB2545CT-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 MBRB2545CT-E3/81 part is unused and in its original packaging.
Return procedure for MBRB2545CT-E3/81:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MBRB2545CT-E3/81 Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
-
BAT54SLT1G
onsemi
-
BAV70LT1G
onsemi
-
BAT54CLT1G
onsemi
-
BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
-
MMBD1503-TP
Micro Commercial Co
-
BAV99WT1G
onsemi
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
