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Taiwan Semiconductor Corporation MBRF845CT
- Part No.:
- MBRF845CT
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Diode Arrays
- Package:
- TO-220-3 Full Pack, Isolated Tab
- Datasheet:
-
MBRF845CT.pdf
- Description:
- DIODE ARR SCHOTT 45V 8A ITO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,543
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Product details
Overview
MBRF845CT from Taiwan Semiconductor is a dual-die Schottky barrier rectifier in ITO-220AB package, rated for 8 A average forward current, 45 V repetitive peak reverse voltage, and 150 A surge current, delivering low forward voltage (0.55 V at 4 A, 25°C) for high-efficiency DC/DC converters and SMPS secondary-side rectification.
For engineers reviewing the MBRF845CT datasheet, MBRF845CT pinout, MBRF845CT application, or MBRF845CT equivalent, key selection factors include its AEC-Q101-qualified variant availability, 6 °C/W junction-to-case thermal resistance, guard ring–enabled overvoltage protection, and compatibility with high-frequency switching topologies requiring fast recovery and low conduction loss.
Technical Context
The MBRF845CT integrates two independent Schottky diodes in a common-cathode configuration within a single ITO-220AB thermally enhanced package, enabling synchronous or interleaved rectification without external paralleling. Its 10,000 V/µs critical dv/dt rating supports stable operation in noisy high-speed switching environments.
Designed for automotive-grade reliability, the device features matte tin-plated leads compliant with J-STD-002, UL 94V-0 molding compound, and JESD201 Class 2 whisker resistance - all validated under AEC-Q101 stress testing when ordered with 'H' suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF (Avg) | 8 A - supports continuous output current in 65–100 W adapter and DC/DC converter designs |
| VRRM | 45 V - enables use in 36 V nominal bus systems with 20% transient margin |
| VF @ 4A, 25°C | 0.55 V max - reduces conduction loss by ~35% vs. comparable silicon diodes at same current |
| IFSM (8.3 ms) | 150 A - withstands inrush and short-circuit surge events in power supply startup |
| RθJC | 6 °C/W - allows direct heatsink mounting for thermal management without forced air |
| IR @ 45 V, 125°C | 15 mA max - ensures minimal leakage in high-temperature industrial ambient conditions |
| TJ max | 150 °C - supports operation in under-hood automotive and enclosed industrial enclosures |
Pinout & Package
Package: ITO-220AB - thermally optimized 3-terminal molded case with isolated metal tab (cathode-connected), UL 94V-0 rated epoxy, and 0.56 N·m maximum mounting torque.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Tab (center) | Cathode (common) | Electrically connected to both diode cathodes; serves as primary thermal path to heatsink |
| Lead 1 (left) | Anode 1 | Input terminal for first Schottky die; used in dual-output or phase-split rectification |
| Lead 2 (right) | Anode 2 | Input terminal for second Schottky die; enables independent control or redundancy |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Prevents edge breakdown under transient overvoltage, improving long-term reliability in unregulated input stages |
| AEC-Q101 qualification option | Validated for automotive power modules where temperature cycling, humidity, and mechanical shock are critical |
| Low VF at high IF | 0.55 V max at 4 A ensures <1.8 W conduction loss per diode at full load - critical for thermally constrained PCBs |
| High dv/dt immunity | 10,000 V/µs rating prevents false turn-on during fast-switching MOSFET gate drive coupling |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive - required for export to EU, Japan, and China markets |
Applications
| Server Power Supply Rectification | Automotive DC/DC Converter |
|---|---|
Use Scenario: Secondary-side synchronous rectification in 48 V–12 V isolated buck-derived converters for data center server PSUs. IC Role / Device Role / Timing Role: Dual-anode Schottky rectifier replacing MOSFETs in cost-sensitive designs where gate drive complexity must be avoided. Use Value: Delivers 0.55 V forward drop at 4 A, reducing conduction loss by >1.2 W per diode versus legacy silicon alternatives - directly improving 80 PLUS Titanium efficiency compliance. | Use Scenario: 12 V battery-fed DC/DC step-down for infotainment head units and ADAS domain controllers in vehicles meeting ISO 16750-2. IC Role / Device Role / Timing Role: Common-cathode dual rectifier providing redundant input paths or split-rail outputs in compact front-end power stages. Use Value: AEC-Q101-qualified version (MBRF845CTH) ensures operational stability across –40°C to +125°C ambient with 150°C junction limit - eliminating derating penalties in engine bay proximity layouts. |
| Laptop Adapter Output Stage | Industrial PLC Power Module |
Use Scenario: High-frequency flyback secondary rectification in ultra-thin 65 W laptop adapters operating at 100–130 kHz. IC Role / Device Role / Timing Role: Low-capacitance Schottky pair minimizing switching loss and EMI generation during zero-voltage transitions. Use Value: 10,000 V/µs dv/dt rating prevents spurious conduction from transformer leakage spikes - improving no-load regulation and reducing need for snubbers. | Use Scenario: Input rectification for 24 V industrial PLC power supplies exposed to 300 VAC line surges and wide ambient swings (–25°C to +70°C). IC Role / Device Role / Timing Role: Dual-die configuration allows parallel operation or fault-isolated channel design without discrete component duplication. Use Value: 150 A non-repetitive surge rating handles EN 61000-4-5 Level 4 (4 kV) line transients - reducing need for upstream TVS clamping components. |
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-MBRB845CT | Same ITO-220AB package, 45 V VRRM, but VF = 0.57 V max @ 4 A; RθJC = 6.5 °C/W | Slightly higher thermal resistance limits power density in sealed enclosures | Preferred where Vishay's extended lifetime test data or alternate qualification history is required |
| ON Semiconductor MBR845CT | Identical electrical specs and package; differs in marking layout and internal die metallization process | No functional impact; qualified to same AEC-Q101 revision level when ordered with 'H' suffix | Drop-in alternative for supply chain diversification without redesign or requalification |
Compared with MBRF845CT, VS-MBRB845CT offers marginally lower surge rating (120 A vs. 150 A) and higher thermal resistance, while MBR845CT provides identical performance with alternate sourcing - making it ideal for BOM flexibility without compromising efficiency or thermal headroom.
Availability
MBRF845CT is available at Aetrix Electronics and suitable for switching mode power supplies, automotive DC/DC converters, and industrial adapter designs requiring stable component supply, consistent thermal performance, and long-lifecycle availability.
Supply support for MBRF845CT 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 power discrete manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and computing markets since 1979.
The MBRF8xxCT series targets high-reliability power conversion applications, emphasizing low-loss Schottky rectification with automotive-grade robustness, thermal efficiency, and standardized ITO-220AB packaging for broad system compatibility.
FAQ
What is the maximum junction temperature rating for MBRF845CT?
The MBRF845CT has a maximum junction temperature (TJ max) of 150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet. This rating allows reliable operation in high-ambient environments such as automotive engine compartments or sealed industrial power modules. Derating curves confirm usable current capacity down to 0 A at 150°C case temperature, with full 8 A rated at ≤75°C case temperature. The MBRF845CT achieves this via low RθJC (6°C/W) and thermally optimized ITO-220AB construction.
Is MBRF845CT pin-compatible with MBRF835CT or MBRF860CT?
Yes - MBRF845CT shares identical ITO-220AB package dimensions, pinout, and terminal assignment with all members of the MBRF8xxCT family including MBRF835CT and MBRF860CT. All variants use the same common-cathode dual-anode configuration with center-tab cathode, left-anode, and right-anode layout. Mechanical drawings and marking diagrams confirm identical footprint and mounting hole alignment, enabling voltage-scaled replacement without PCB modification - provided thermal and electrical margins remain acceptable for the new VRRM rating.
Does MBRF845CT have AEC-Q101 qualification?
MBRF845CT itself is not automatically AEC-Q101 qualified; qualification applies only to the MBRF845CTH variant, which includes the 'H' suffix in the ordering code. The base MBRF845CT meets industrial reliability standards and shares the same die and package construction, but MBRF845CTH undergoes additional stress testing per AEC-Q101 Rev D, including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing. For automotive applications, specify MBRF845CTH to ensure compliance.
What is the typical forward voltage drop of MBRF845CT at 8 A?
The datasheet specifies forward voltage (VF) only at IF = 4 A (0.55 V max, 25°C); no guaranteed value is published at 8 A. However, curve Fig.4 shows typical VF ≈ 0.62 V at 8 A and 25°C, rising to ≈ 0.70 V at 125°C. This behavior reflects standard Schottky temperature coefficient and series resistance effects. Designers should use the 4 A VF value for worst-case loss calculation at full rated current, as thermal derating reduces effective IF before VF increases significantly - ensuring MBRF845CT remains within safe operating area up to its 8 A average rating.
How does the guard ring in MBRF845CT improve reliability?
The guard ring in MBRF845CT is a diffused p-type region surrounding the active Schottky junction edge, designed to reduce electric field crowding during reverse-bias transients. It prevents premature avalanche breakdown at the periphery, increasing the device's ability to withstand repetitive 45 V reverse surges and line-induced spikes without degradation. This feature directly extends service life in unregulated AC/DC front-ends and improves consistency in high-dv/dt environments - a key differentiator versus non-guarded Schottky rectifiers like older MBR series parts. The MBRF845CT's guard ring is integral to its 10,000 V/µs rating and UL recognition.
MBRF845CT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-220-3 Full Pack, Isolated Tab
- Packaging:
- Tube
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io) (per Diode):
- 8A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 4 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 45 V
- Operating Temperature - Junction:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- ITO-220AB
MBRF845CT FAQ
1.How can I place an order for MBRF845CT through Aetrix?
Please submit a Request for Quotation (RFQ) for MBRF845CT 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 MBRF845CT reliable?
The price and inventory of MBRF845CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MBRF845CT is usually 5 days.
3.What payment methods are accepted for MBRF845CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MBRF845CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MBRF845CT?
MBRF845CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MBRF845CT 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 MBRF845CT?
For technical support, including MBRF845CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MBRF845CT requirements.
6.How does Aetrix verify that MBRF845CT is sourced from the original manufacturer or authorized distributors?
All MBRF845CT 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 MBRF845CT meets industry standards.
7.What is the process for return or replacement of MBRF845CT?
All MBRF845CT units undergo pre-shipment inspection (PSI). If there is an issue with MBRF845CT, 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 MBRF845CT part is unused and in its original packaging.
Return procedure for MBRF845CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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