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Vishay General Semiconductor - Diodes Division MBRB1045HE3_B/I
- Part No.:
- MBRB1045HE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Diodes
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
MBRB1045HE3_B/I.pdf
- Description:
- DIODE SCHOTTKY 45V 10A TO263AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,513
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Product details
Overview
MBRB1045HE3_B/I from Vishay General Semiconductor is a Schottky barrier rectifier in D2PAK (TO-263AB) package, rated for 10 A average forward current, 45 V repetitive peak reverse voltage, and 150 A surge capability at 8.3 ms. It delivers low forward voltage drop (0.70 V at 10 A, 125 °C), high-frequency operation, and is RoHS-compliant with halogen-free construction.
For engineers reviewing the MBRB1045HE3_B/I datasheet, MBRB1045HE3_B/I pinout, MBRB1045HE3_B/I application, or MBRB1045HE3_B/I equivalent, key selection criteria include thermal resistance (2.0 °C/W junction-to-case), AEC-Q101 qualification status, TO-263AB mounting compatibility, and polarity-marked terminal layout for DC/DC converter freewheeling paths.
Technical Context
This device operates as a single-diode unidirectional power rectifier optimized for low-loss switching-mode power supply outputs. Its Schottky architecture enables fast recovery (no minority-carrier storage), minimal reverse recovery charge, and stable performance up to 10,000 V/μs voltage slew rate.
Designed for surface-mount assembly on thermally enhanced PCBs, the D2PAK package supports direct heatsinking via the exposed cathode tab (Pin 3/K). The device maintains 0.57 V forward voltage at 10 A and 25 °C, with junction temperature rated from –65 °C to +150 °C and storage up to +175 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) | 10 A - continuous DC output current capability at TC = 25 °C with adequate heatsinking |
| VRRM | 45 V - maximum allowable reverse blocking voltage without breakdown |
| IFSM | 150 A - non-repetitive surge current tolerance for 8.3 ms half-sine waveform |
| VF @ 10 A, 125 °C | 0.70 V - forward voltage under worst-case thermal operating condition, defining conduction loss |
| RθJC | 2.0 °C/W - thermal resistance from junction to case, critical for heatsink sizing in high-power layouts |
| TJ max. | +150 °C - maximum junction temperature limit, constraining ambient and power dissipation design margins |
| dV/dt | 10,000 V/μs - minimum voltage transient immunity before unintended turn-on occurs |
Pinout & Package
Package: D2PAK (TO-263AB), surface-mount with exposed cathode tab (Pin 3/K) for thermal and electrical connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Input terminal for forward current flow; connects to switching node or input rail |
| Pin 2 | Cathode | Output terminal for rectified current; electrically tied to Pin 3 in package |
| Pin 3 / K | Cathode Tab | Exposed metal pad serving as primary thermal path and low-inductance cathode return |
Key Features
| Feature | Design Value |
|---|---|
| Low VF at high temperature | 0.70 V @ 10 A, 125 °C - reduces conduction losses in thermally stressed DC/DC stages |
| AEC-Q101 qualified option available | HM3 suffix variant meets automotive reliability standard - supports automotive-grade designs when specified |
| High dV/dt immunity | 10,000 V/μs - prevents false triggering during fast-switching transients in SMPS |
| Halogen-free & RoHS-compliant | M3 suffix indicates compliant materials - satisfies environmental compliance requirements for industrial and consumer end products |
| MSL Level 1 rating | Rated for reflow up to 245 °C peak - enables standard Pb-free SMT assembly without moisture sensitivity concerns |
Applications
| Server Power Supply Output Rectification | Industrial DC/DC Converter Freewheeling |
|---|---|
Use Scenario: High-efficiency 12 V or 5 V output stage in 80 PLUS Titanium server PSUs with synchronous rectification backup. IC Role / Device Role / Timing Role: Primary Schottky rectifier handling continuous 10 A load with minimal voltage drop and thermal rise. Use Value: 0.70 V VF at 125 °C lowers conduction loss vs. silicon diodes, improving full-load efficiency by ~0.4–0.6 % in 48 V–12 V isolated converters. |
Use Scenario: Freewheeling path in 24 V input, 3.3 V/5 V isolated flyback or forward converters for PLC I/O modules. IC Role / Device Role / Timing Role: Unidirectional current clamp during MOSFET off-time, absorbing inductive energy with fast recovery. Use Value: 10,000 V/μs dV/dt rating ensures no spurious turn-on during 50–100 ns MOSFET transitions, eliminating shoot-through risk. |
| Automotive Body Control Module Polarity Protection | Telecom DC Brick Input Protection |
Use Scenario: Reverse-voltage protection at 12 V/24 V battery inputs of BCMs where AEC-Q101 qualification is required. IC Role / Device Role / Timing Role: Series-blocking diode preventing damage from accidental battery reversal during service. Use Value: 45 V VRRM margin accommodates load-dump transients up to ISO 7637-2 Pulse 5a (≤ 60 V), while 150 A IFSM withstands cranking surges. |
Use Scenario: Input-side polarity guard in 48 V telecom DC bricks feeding PoE midspans or remote radio units. IC Role / Device Role / Timing Role: Low-loss series rectifier ensuring correct DC polarity before downstream DC/DC regulation. Use Value: 2.0 °C/W RθJC allows direct copper pour attachment to chassis ground, enabling passive thermal management without discrete heatsinks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STPS1045CGY | Same 10 A / 45 V rating, TO-263AB package, VF = 0.72 V @ 10 A, 125 °C; RθJC = 2.5 °C/W | Slightly higher thermal resistance limits power density in compact layouts; not AEC-Q101 qualified | Select when cost sensitivity outweighs thermal margin or automotive qualification needs |
| ON Semi SB1040 | 10 A / 40 V rating, TO-263AB, VF = 0.69 V @ 10 A, 125 °C; VRRM 5 V lower than MBRB1045HE3_B/I | Not suitable for 45 V-rated systems or ISO 7637-2 Pulse 5a environments due to reduced blocking margin | Choose only for 36 V nominal input systems where 40 V VRRM provides sufficient safety margin |
Compared with STPS1045CGY and SB1040, MBRB1045HE3_B/I offers superior thermal performance (2.0 vs. 2.5 °C/W), tighter VRRM margin for automotive transients, and halogen-free compliance - making it preferred for space-constrained, thermally demanding, or environmentally regulated designs.
Availability
MBRB1045HE3_B/I is available at Aetrix Electronics and suitable for server power supplies, industrial DC/DC converters, automotive body control modules, and telecom DC brick applications requiring stable component supply, consistent lead-time visibility, and long-term production support.
Supply support for MBRB1045HE3_B/I 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 reliability.
The MBRB10xx series targets high-frequency, low-loss power conversion in space- and thermally-constrained applications - designed specifically for SMPS output stages, freewheeling, and polarity protection where Schottky performance advantages are critical.
FAQ
What is the package type and mounting configuration of MBRB1045HE3_B/I?
MBRB1045HE3_B/I uses the D2PAK (TO-263AB) surface-mount package with an exposed cathode tab (Pin 3/K) that serves as both the electrical cathode connection and primary thermal path. It is designed for soldering onto thermally enhanced PCB copper areas, not mechanical screw-mounting. The device has three terminals: Pin 1 (anode), Pin 2 (cathode), and Pin 3/K (cathode tab), with polarity marked on the top surface per Vishay's standard marking convention.
Is MBRB1045HE3_B/I AEC-Q101 qualified?
MBRB1045HE3_B/I is not AEC-Q101 qualified; that qualification applies only to the HM3-suffixed variant (e.g., MBRB1045HM3/I). The "HE3_B/I" suffix indicates RoHS-compliant, halogen-free commercial-grade construction with tape-and-reel packaging (I = reel), but without automotive stress testing. For automotive applications requiring AEC-Q101, the HM3 version must be specified instead of MBRB1045HE3_B/I.
What is the maximum junction temperature and thermal resistance of MBRB1045HE3_B/I?
MBRB1045HE3_B/I has a maximum junction temperature (TJ max.) of +150 °C and a typical thermal resistance from junction to case (RθJC) of 2.0 °C/W. This value assumes proper soldering of the exposed cathode tab to a minimum 1.0 cm² copper area with ≥2 oz. thickness. Exceeding TJ max. risks parametric shift or permanent failure; derating curves in the Vishay datasheet (Fig. 1) must be applied for ambient temperatures above 25 °C.
How does the forward voltage of MBRB1045HE3_B/I compare at different temperatures and currents?
MBRB1045HE3_B/I exhibits VF = 0.57 V at 10 A and 25 °C, rising to 0.70 V at 10 A and 125 °C. At 20 A, VF reaches 0.72 V (125 °C) and 0.84 V (25 °C). These values reflect its Schottky barrier physics - lower VF than silicon diodes but with positive temperature coefficient. Designers must use the 125 °C data for worst-case loss calculation in thermally constrained systems.
Can MBRB1045HE3_B/I replace TO-220AC-packaged MBR1045-E3/45 in existing designs?
No - MBRB1045HE3_B/I cannot directly replace TO-220AC-packaged MBR1045-E3/45 without PCB layout revision. Although both share identical electrical ratings (10 A, 45 V), they differ in package (D2PAK vs. TO-220AC), pinout (3-terminal SMD vs. 2-pin through-hole), thermal interface (cathode tab vs. insulated case), and mounting method. Interchange requires redesign of footprint, stencil, and thermal copper layout - it is not a drop-in replacement.
MBRB1045HE3_B/I 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
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io):
- 10A
- Voltage - Forward (Vf) (Max) @ If:
- 840 mV @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 45 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263AB
- Operating Temperature - Junction:
- -65°C ~ 150°C
MBRB1045HE3_B/I FAQ
1.How can I place an order for MBRB1045HE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for MBRB1045HE3_B/I 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 MBRB1045HE3_B/I reliable?
The price and inventory of MBRB1045HE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MBRB1045HE3_B/I is usually 5 days.
3.What payment methods are accepted for MBRB1045HE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MBRB1045HE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MBRB1045HE3_B/I?
MBRB1045HE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MBRB1045HE3_B/I 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 MBRB1045HE3_B/I?
For technical support, including MBRB1045HE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MBRB1045HE3_B/I requirements.
6.How does Aetrix verify that MBRB1045HE3_B/I is sourced from the original manufacturer or authorized distributors?
All MBRB1045HE3_B/I 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 MBRB1045HE3_B/I meets industry standards.
7.What is the process for return or replacement of MBRB1045HE3_B/I?
All MBRB1045HE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with MBRB1045HE3_B/I, 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 MBRB1045HE3_B/I part is unused and in its original packaging.
Return procedure for MBRB1045HE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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