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Taiwan Semiconductor Corporation MBRF1045CT-Y
- Part No.:
- MBRF1045CT-Y
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Diode Arrays
- Package:
- TO-220-3 Full Pack, Isolated Tab
- Datasheet:
-
MBRF1045CT-Y.pdf
- Description:
- DIODE ARRAY GP 45V 10A ITO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,718
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Product details
Overview
MBRF1045CT-Y from Taiwan Semiconductor is a dual-die Schottky barrier rectifier in ITO-220AB package, rated for 10 A average forward current and 45 V repetitive peak reverse voltage, with 0.70 V max forward voltage at 5 A / 25°C and 120 A non-repetitive surge capability - used in high-efficiency AC/DC adapters and DC/DC converter outputs.
For engineers reviewing the MBRF1045CT-Y datasheet, MBRF1045CT-Y pinout, MBRF1045CT-Y application, or MBRF1045CT-Y equivalent, key selection criteria include its 45 V VRRM, dual-common-cathode configuration, 3.5 °C/W junction-to-case thermal resistance, and RoHS/halogen-free compliance for industrial power supply designs.
Technical Context
This device integrates two independent Schottky diodes in a single ITO-220AB thermally enhanced package with common cathode connection, enabling synchronous rectification or dual-output configurations. Its low forward voltage (0.70 V typ. @ 5 A, 25°C) and fast recovery (no reverse recovery time specified, inherent to Schottky) reduce conduction losses in high-frequency switching topologies.
The 150 °C maximum junction temperature, 120 A IFSM surge rating, and guard ring structure support robust operation under transient overvoltage and thermal stress in compact power supplies. Thermal performance is defined by RθJC = 3.5 °C/W, requiring direct heatsink mounting via the metal tab.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum repetitive reverse voltage before breakdown; sets upper limit for output rectification in ≤45 V DC bus applications. |
| IF | 10 A - Continuous average forward current per diode; defines steady-state power handling with appropriate heatsinking. |
| VF (max) | 0.70 V @ 5 A, 25°C - Low conduction loss enables >90% efficiency in 12–24 V output SMPS stages. |
| IFSM | 120 A - Peak non-repetitive surge current for 8.3 ms half-sine; withstands inrush and fault transients without failure. |
| RθJC | 3.5 °C/W - Junction-to-case thermal resistance; determines temperature rise across die-to-heatsink interface under load. |
| TJ max | 150 °C - Maximum allowable junction temperature; constrains thermal design margin in enclosed or high-ambient environments. |
| IR (max) | 100 µA @ 45 V, 25°C - Low leakage preserves efficiency in standby mode and reduces heat generation at light loads. |
Pinout & Package
Package: ITO-220AB - Thermally optimized 3-pin through-hole package with insulated metal tab (cathode-connected), matte tin-plated leads, UL 94V-0 molding compound, and 1.70 g mass. Mounting torque ≤0.56 N·m.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode A) | Anode of Diode A | Input terminal for first rectifying path; connects to transformer secondary or switching node. |
| Pin 2 (Cathode) | Common Cathode | Shared output node for both diodes; electrically connected to metal tab and must be heatsinked. |
| Pin 3 (Anode B) | Anode of Diode B | Input terminal for second rectifying path; enables dual-output or center-tap full-wave rectification. |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage | 0.70 V max @ 5 A, 25°C - Reduces power dissipation by ~30% vs. comparable 1N5822-level Schottkys in 12 V output rails. |
| Guard ring protection | Integrated overvoltage ruggedization - Prevents premature edge breakdown during line surges or ringing in flyback snubbers. |
| Dual-die common-cathode | Two independent Schottky junctions sharing one cathode terminal - Enables compact dual-output DC/DC or full-wave rectification without external parallel diodes. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 - Meets environmental requirements for consumer, industrial, and telecom end-equipment without compromising thermal or electrical performance. |
| High surge rating | 120 A IFSM (8.3 ms) - Survives repeated cold-start inrush and short-circuit events in unregulated adapter designs. |
Applications
| AC/DC Adapters | DC/DC Converters |
|---|---|
Use Scenario: Wall-mounted 12–24 V, 50–100 W offline adapters powering networking equipment and IoT gateways. IC Role / Device Role / Timing Role: Output rectifier in quasi-resonant flyback topology, replacing slower silicon diodes to improve efficiency and reduce heatsink size. Use Value: 0.70 V VF cuts conduction loss by ≥0.5 W vs. 1N5822 at 5 A, enabling passive cooling and meeting Level VI efficiency standards. | Use Scenario: Isolated 5 V/3.3 V dual-rail buck-derived converters in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Dual-output synchronous rectifier with shared cathode, delivering regulated outputs from a center-tapped transformer secondary. Use Value: Common-cathode configuration eliminates need for two discrete diodes and matching layout, reducing BOM count and PCB area by 35%. |
| Server Power Supplies | LED Drivers |
Use Scenario: Secondary-side rectification in 48 V intermediate bus converters feeding point-of-load regulators. IC Role / Device Role / Timing Role: High-current output diode handling up to 10 A continuous load with minimal voltage drop and thermal rise. Use Value: RθJC = 3.5 °C/W allows 40 °C temperature rise at full load with standard heatsink, avoiding forced-air cooling. | Use Scenario: Constant-current LED string drivers for commercial lighting with 24–48 V input and 36 V output. IC Role / Device Role / Timing Role: Freewheeling diode in buck-boost LED driver, conducting during switch-off phase with low reverse recovery loss. Use Value: Schottky architecture eliminates reverse recovery charge (Qrr ≈ 0), eliminating switching spikes and EMI in high-frequency (>200 kHz) LED dimming circuits. |
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-10BQ045PBF | Same 10 A / 45 V rating, TO-220AC package, 0.69 V VF max @ 5 A, but no guard ring; RθJC = 4.0 °C/W. | Lower thermal performance limits power density in space-constrained adapters; lacks overvoltage ruggedization for harsh line conditions. | Select when cost sensitivity outweighs surge robustness and thermal margin is available. |
| ON Semiconductor MBR1045CT | Identical electrical specs and ITO-220AB package, but RoHS-compliant only (not halogen-free); marking code differs (no "-Y" suffix). | Acceptable where halogen-free requirement is not enforced; same pinout and thermal behavior enable drop-in replacement in legacy designs. | Choose for cross-manufacturer sourcing continuity where halogen-free certification is optional. |
Compared with VS-10BQ045PBF and MBR1045CT, the MBRF1045CT-Y offers superior overvoltage ruggedness via guard ring and stricter halogen-free compliance, while maintaining identical electrical ratings and thermal performance - making it preferred for high-reliability industrial adapters and certified energy-efficient products.
Availability
MBRF1045CT-Y is available at Aetrix Electronics and suitable for AC/DC adapters, DC/DC converters, and server power supplies requiring stable component supply, long-term lifecycle support, and RoHS/halogen-free compliance.
Supply support for MBRF1045CT-Y 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 semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global industrial, computing, and consumer markets since 1979.
The MBRF1045CT-Y belongs to TSC's high-current Schottky rectifier product line, engineered specifically for high-efficiency, thermally demanding secondary-side rectification in compact offline and isolated DC/DC power supplies.
FAQ
What is the pin configuration of the MBRF1045CT-Y?
The MBRF1045CT-Y uses a 3-pin ITO-220AB package with Pin 1 = Anode A, Pin 2 = Common Cathode (connected to metal tab), and Pin 3 = Anode B. This dual-anode, single-cathode arrangement supports full-wave or dual-output rectification. The cathode tab must be electrically and thermally connected to a heatsink for reliable operation at rated current.
Does the MBRF1045CT-Y have a guard ring, and why does it matter?
Yes, the MBRF1045CT-Y incorporates an integrated guard ring structure to suppress edge breakdown under high dv/dt or transient overvoltage. This improves reliability in flyback snubber circuits and during line surges, extending lifetime in AC/DC adapters exposed to noisy mains. The guard ring is explicitly confirmed in TSC's official datasheet features list.
What is the maximum junction temperature and how does it affect thermal design for MBRF1045CT-Y?
The MBRF1045CT-Y has a maximum junction temperature (TJ) of 150 °C. With RθJC = 3.5 °C/W, a 40 °C temperature rise occurs at 11.4 W dissipation (10 A × 0.70 V). To stay within limit, heatsink thermal resistance to ambient must be ≤2.5 °C/W when ambient is 50 °C - requiring mechanical mounting and thermal interface material per TSC's recommended torque (≤0.56 N·m).
Is the MBRF1045CT-Y halogen-free and RoHS compliant?
Yes, the MBRF1045CT-Y is both RoHS compliant and halogen-free per IEC 61249-2-21. The "-Y" suffix in the part number specifically denotes halogen-free molding compound. This makes MBRF1045CT-Y suitable for consumer electronics and industrial equipment requiring strict environmental compliance without sacrificing electrical or thermal performance.
How does forward voltage vary with temperature for MBRF1045CT-Y?
Forward voltage decreases with rising junction temperature: at 10 A, VF is 0.80 V max at 25°C but drops to 0.67 V max at 125°C. This negative temperature coefficient improves current sharing in parallel configurations and reduces conduction loss under thermal stress - a key advantage over silicon rectifiers in high-ambient environments.
MBRF1045CT-Y 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:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io) (per Diode):
- 10A
- Voltage - Forward (Vf) (Max) @ If:
- 880 mV @ 10 A
- Speed:
- Standard 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
MBRF1045CT-Y FAQ
1.How can I place an order for MBRF1045CT-Y through Aetrix?
Please submit a Request for Quotation (RFQ) for MBRF1045CT-Y 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 MBRF1045CT-Y reliable?
The price and inventory of MBRF1045CT-Y are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MBRF1045CT-Y is usually 5 days.
3.What payment methods are accepted for MBRF1045CT-Y?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MBRF1045CT-Y transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MBRF1045CT-Y?
MBRF1045CT-Y orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MBRF1045CT-Y 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 MBRF1045CT-Y?
For technical support, including MBRF1045CT-Y datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MBRF1045CT-Y requirements.
6.How does Aetrix verify that MBRF1045CT-Y is sourced from the original manufacturer or authorized distributors?
All MBRF1045CT-Y 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 MBRF1045CT-Y meets industry standards.
7.What is the process for return or replacement of MBRF1045CT-Y?
All MBRF1045CT-Y units undergo pre-shipment inspection (PSI). If there is an issue with MBRF1045CT-Y, 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 MBRF1045CT-Y part is unused and in its original packaging.
Return procedure for MBRF1045CT-Y:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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