My Inquiry
My Account
Taiwan Semiconductor Corporation MBR1045
- Part No.:
- MBR1045
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-220-2
- Datasheet:
-
MBR1045.pdf
- Description:
- DIODE SCHOTTKY 45V 10A TO220AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,381
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MBR1045 from Taiwan Semiconductor is a 10A, 45V Schottky barrier rectifier in TO-220AC package, featuring low forward voltage (0.70 V at 10 A, 25°C), high surge current capability (150 A), and AEC-Q101 qualification option. It serves as a primary output rectifier in high-efficiency DC/DC converters and AC/DC adapters.
For engineers reviewing the MBR1045 datasheet, MBR1045 pinout, MBR1045 application, or MBR1045 equivalent, key selection criteria include its 45 V repetitive peak reverse voltage, 3°C/W junction-to-case thermal resistance, 150 A non-repetitive surge rating, and compatibility with surface-mount heatsink mounting per JESD201 Class 2 whisker testing.
Technical Context
The MBR1045 uses a single-die Schottky structure optimized for low conduction loss in medium-voltage switching power supplies. Its guard ring design enhances ruggedness against transient overvoltage events, while the matte tin-plated leads ensure reliable solderability per J-STD-002.
Thermally, it delivers 3°C/W junction-to-case resistance and operates across –55°C to +150°C junction temperature range. Reverse leakage remains ≤100 µA at 25°C and ≤15 mA at 125°C under rated 45 V reverse bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum repetitive reverse blocking voltage; defines safe operating ceiling in rectifier position |
| IF | 10 A - Continuous average forward current; sets baseline conduction capacity at case temperature ≤75°C |
| VF @ 10A, 25°C | 0.70 V - Low forward drop reduces conduction loss and improves system efficiency |
| IFSM | 150 A - Peak non-repetitive surge current handling; supports inrush and fault transients |
| RθJC | 3°C/W - Thermal resistance from junction to case; enables predictable heatsink sizing |
| TJ max | +150°C - Maximum junction temperature; allows operation in high-ambient industrial environments |
| IR @ 45V, 25°C | ≤100 µA - Low reverse leakage preserves efficiency in standby and light-load conditions |
Pinout & Package
Package: TO-220AC - Three-terminal, through-hole molded plastic case with isolated tab; tab is cathode-connected, requires electrical isolation when mounted to heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input terminal for forward conduction | Connected to transformer secondary or switch node; carries full load current during on-state |
| Cathode | Output terminal for forward conduction | Electrically tied to metal tab; must be isolated from chassis unless common-cathode topology is used |
| Tab (Cathode) | Thermal and electrical cathode path | Serves dual role: primary heat dissipation surface and low-inductance cathode connection |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring protection | Enhances avalanche ruggedness and prevents edge breakdown under voltage transients |
| AEC-Q101 qualified version available | Validated for automotive powertrain and body electronics applications requiring stress-tested reliability |
| RoHS and halogen-free compliance | Meets IEC 61249-2-21 and EU RoHS directives for environmentally constrained deployments |
| 1.88 g mass with UL 94V-0 molding | Enables consistent mechanical mounting and meets flammability safety requirements in enclosed power systems |
Applications
| Laptop Adapter Secondary Rectification | Industrial DC/DC Converter Output Stage |
|---|---|
Use Scenario: High-frequency flyback converter delivering 19 V / 4.74 A to laptop motherboard. IC Role / Device Role / Timing Role: Primary unidirectional power switch converting transformer AC output to regulated DC. Use Value: 0.70 V VF minimizes conduction loss at 10 A, improving adapter efficiency by ~1.2% versus higher-VF alternatives. | Use Scenario: 48 V input to 12 V isolated buck-derived converter in programmable logic controller (PLC) power module. IC Role / Device Role / Timing Role: Synchronous rectifier replacement enabling fixed-frequency, hard-switched output rectification. Use Value: 150 A IFSM withstands repeated motor-start surges without degradation, extending field service life. |
| Automotive USB-C Power Delivery Module | Telecom Wall-Mounted AC/DC PSU |
Use Scenario: 12 V auxiliary rail generation in vehicle infotainment head unit with AEC-Q101-compliant BOM. IC Role / Device Role / Timing Role: Output rectifier in quasi-resonant forward converter operating up to 300 kHz. Use Value: AEC-Q101-qualified MBR1045H variant ensures qualification traceability for automotive PPAP submission. | Use Scenario: 24 V/5 A output stage in telecom-grade wall adapter meeting Level VI efficiency standards. IC Role / Device Role / Timing Role: Main output rectifier subjected to 85–264 VAC universal input and 50°C ambient operation. Use Value: 3°C/W RθJC enables passive heatsinking within compact 30 mm × 30 mm footprint, avoiding fan cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-10BQ045 | Same 10 A / 45 V rating; VF = 0.58 V (typ) at 10 A, but RθJC = 4.5°C/W | Lower VF improves light-load efficiency; higher thermal resistance limits high-ambient use | Prefer for efficiency-critical, low-ambient telecom apps; avoid where heatsink space is constrained |
| ON Semiconductor MBR1045CT | Dual-diode configuration in TO-220AB; not single-die like MBR1045; VF = 0.72 V (max) | Offers center-tap capability for dual-output designs; incompatible for single-output layouts | Select only if dual-anode/cathode topology is required; not a drop-in replacement |
Compared with VS-10BQ045 and MBR1045CT, the MBR1045 provides optimal balance of thermal performance (3°C/W), proven surge robustness (150 A), and AEC-Q101 availability-making it preferred for industrial and automotive power stages where reliability and heatsink integration are prioritized over marginal VF reduction.
Availability
MBR1045 is available at Aetrix Electronics and suitable for switching mode power supplies, DC/DC converters, and AC/DC adapters requiring stable component supply, long-term lifecycle support, and AEC-Q101-qualified variants.
Supply support for MBR1045 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving industrial, computing, and automotive markets since 1979.
The MBR1045 belongs to TSC's high-current Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in space-constrained and thermally demanding applications.
FAQ
What is the maximum junction temperature rating for the MBR1045?
The MBR1045 has a maximum junction temperature (TJ max) of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet. This rating enables reliable operation in high-ambient environments such as enclosed industrial power supplies or under-hood automotive modules when properly heatsinked. Derating curves confirm usable current capacity down to 0 A at 150°C case temperature.
Is the MBR1045 pin-compatible with other parts in the MBR10xx family?
Yes-the MBR1045 shares identical TO-220AC package dimensions, pinout (anode, cathode, cathode-tab), and mechanical mounting interface with all MBR10xx devices (e.g., MBR1035, MBR1060). However, voltage rating (VRRM), forward voltage (VF), and reverse leakage (IR) differ across the family, so electrical substitution requires validation against circuit stress margins.
Does the standard MBR1045 meet AEC-Q101 qualification?
No-the base MBR1045 is not AEC-Q101 qualified; only the MBR1045H variant carries that certification. The "H" suffix explicitly denotes automotive-grade stress testing per AEC-Q101 Rev D. Designers targeting automotive applications must specify MBR1045H and verify packaging markings and traceability documentation.
What is the typical forward voltage of the MBR1045 at 10 A and 125°C?
The typical forward voltage of the MBR1045 at 10 A and 125°C is 0.57 V, as specified in the Electrical Specifications table of the Taiwan Semiconductor datasheet. This lower VF at elevated temperature reflects the negative temperature coefficient of Schottky diodes and supports stable performance during thermal transients in high-power-density designs.
How is thermal management implemented for the MBR1045 in high-current applications?
The MBR1045 relies on its metal tab (cathode) for heat transfer, with a specified junction-to-case thermal resistance of 3°C/W. Effective thermal management requires mounting the tab to a heatsink using thermally conductive insulator (e.g., mica washer + thermal grease) and torque ≤0.56 N·m. PCB copper area alone is insufficient-case temperature must remain ≤75°C to sustain 10 A continuous current.
MBR1045 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-220-2
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io):
- 10A
- Voltage - Forward (Vf) (Max) @ If:
- 700 mV @ 10 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 45 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AC
- Operating Temperature - Junction:
- -55°C ~ 150°C
MBR1045 FAQ
1.How can I place an order for MBR1045 through Aetrix?
Please submit a Request for Quotation (RFQ) for MBR1045 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 MBR1045 reliable?
The price and inventory of MBR1045 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MBR1045 is usually 5 days.
3.What payment methods are accepted for MBR1045?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MBR1045 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MBR1045?
MBR1045 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MBR1045 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 MBR1045?
For technical support, including MBR1045 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MBR1045 requirements.
6.How does Aetrix verify that MBR1045 is sourced from the original manufacturer or authorized distributors?
All MBR1045 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 MBR1045 meets industry standards.
7.What is the process for return or replacement of MBR1045?
All MBR1045 units undergo pre-shipment inspection (PSI). If there is an issue with MBR1045, 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 MBR1045 part is unused and in its original packaging.
Return procedure for MBR1045:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MBR1045 Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
