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Taiwan Semiconductor Corporation MBRS1545CTH
- Part No.:
- MBRS1545CTH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Diode Arrays
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
MBRS1545CTH.pdf
- Description:
- DIODE ARR SCHOTT 45V 15A TO263AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,528
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Product details
Overview
MBRS1545CTH from Taiwan Semiconductor is a 15A, 45V dual-die Schottky barrier rectifier in TO-263AB (D2PAK) package, featuring low forward voltage (0.84 V at 15 A, 25°C), 150 A surge capability, and AEC-Q101 qualification for automotive-grade reliability. It serves as a high-efficiency freewheeling or reverse-battery protection diode in DC/DC converters and car lighting systems.
For engineers reviewing the MBRS1545CTH datasheet, MBRS1545CTH pinout, MBRS1545CTH application, or MBRS1545CTH equivalent, key selection criteria include its 45 V repetitive peak reverse voltage, 2 °C/W junction-to-case thermal resistance, 150 A IFSM rating, and TO-263AB surface-mount compatibility with automated placement.
Technical Context
This dual-die Schottky rectifier integrates two independent anode-cathode junctions in a single TO-263AB thermally enhanced package, enabling shared heatsinking and compact layout in bidirectional or dual-rail power paths. Its guard ring structure provides overvoltage protection, and the device operates across –55°C to +150°C junction temperature range.
Designed for high-frequency switching applications, it delivers low conduction loss (VF ≤ 0.72 V at 15 A, 125°C) and fast recovery (no stored charge, zero reverse recovery time), eliminating snubber circuits in 20 kHz square-wave operation per diode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum repetitive reverse voltage per diode; defines safe blocking capability in 12–24 V automotive bus protection. |
| IF | 15 A - Continuous average forward current per diode; supports sustained 15 A DC output in DC/DC converter outputs. |
| IFSM | 150 A - Non-repetitive surge current (8.3 ms half-sine); withstands load dump transients in vehicle electrical systems. |
| VF @ 15 A, 25°C | 0.84 V - Forward voltage drop per diode; enables <1.3 W conduction loss at full rated current, reducing thermal design burden. |
| RθJC | 2 °C/W - Junction-to-case thermal resistance; allows direct PCB copper pour heatsinking for high-power density layouts. |
| IR @ 45 V, 125°C | 15 mA - Max reverse leakage per diode; ensures minimal standby power loss in reverse-battery protection circuits. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments without derating. |
Pinout & Package
Package: TO-263AB (D2PAK), surface-mount, thermally enhanced with exposed cathode tab. Three terminals: Pin 1 = Anode 1, Pin 2 = Cathode (common), Pin 3 = Anode 2. Cathode tab is electrically connected to Pin 2 and serves as primary thermal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode 1) | Input anode of first Schottky die | Connects to positive rail or switch node requiring unidirectional current flow in dual-path topologies. |
| Pin 2 (Cathode) | Common cathode terminal for both dies | Electrically and thermally tied to exposed metal tab; must be soldered to large copper area for thermal management. |
| Pin 3 (Anode 2) | Input anode of second Schottky die | Enables independent control or redundancy-e.g., one diode for freewheeling, the other for reverse polarity protection. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive stress conditions including temperature cycling, HTRB, and ESD-enabling use in ASIL-B–compatible systems without additional qualification. |
| Guard ring structure | Prevents edge breakdown at rated VRRM, improving long-term reliability under transient overvoltage (e.g., ISO 7637-2 pulse 1/2a/5a). |
| Moisture sensitivity level 1 | No floor life limitation or bake requirement before reflow-supports standard SMT assembly without special handling. |
| Dual-die configuration | Two independent Schottky junctions share thermal mass and footprint, reducing board space vs. discrete dual-diode solutions by ~40%. |
| Matte tin-plated leads | Ensures robust solderability per J-STD-002 and eliminates whisker risk per JESD201 Class 2-critical for automotive field longevity. |
Applications
| DC/DC Converter Output Rectification | Reverse Battery Protection |
|---|---|
Use Scenario: High-efficiency 12 V → 5 V/3.3 V buck converter in automotive infotainment head units. IC Role / Device Role / Timing Role: Primary output rectifier replacing synchronous MOSFETs where simplicity and cost outweigh marginal efficiency gain. Use Value: 0.84 V VF at 15 A reduces conduction loss by >30% versus standard PN diodes, lowering heatsink requirements and improving light-load efficiency. | Use Scenario: Input protection circuit on 24 V commercial vehicle telematics module. IC Role / Device Role / Timing Role: Series-connected Schottky diode preventing damage during accidental reverse battery connection. Use Value: 45 V VRRM exceeds 24 V system's worst-case load dump (ISO 7637-2 Pulse 5a: up to 40 V), while 15 mA IR at 125°C limits standby current drain. |
| Freewheeling Diode in Motor Drivers | Car Lighting Power Supply |
Use Scenario: Freewheeling path for brushed DC motor driver ICs in seat/mirror control modules. IC Role / Device Role / Timing Role: Provides low-loss recirculation path during PWM off-time, minimizing voltage spikes and EMI. Use Value: Zero reverse recovery time eliminates switching losses and ringing, allowing clean 20 kHz PWM operation without snubbers. | Use Scenario: Constant-current LED driver for adaptive front lighting (AFL) systems. IC Role / Device Role / Timing Role: Output rectifier in flyback or buck-boost topology powering high-brightness LED strings. Use Value: Dual-die layout permits redundant rectification or split-current paths, enhancing system-level MTBF in safety-critical lighting. |
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-MBR1545CT | Same 15 A / 45 V rating, TO-263AB package, but not AEC-Q101 qualified; RθJC = 2.5 °C/W (vs. 2.0 °C/W). | Lacks automotive qualification; suitable for industrial DC/DC but requires separate reliability validation for automotive deployment. | Select when AEC-Q101 is not mandated and thermal margin allows 0.5 °C/W higher junction rise. |
| ON Semiconductor MBR1545CT | Identical electrical specs and TO-263AB footprint; however, only rated to TJ = 125 °C (vs. 150 °C) and lacks guard ring structure. | Not recommended for under-hood applications above 125 °C ambient or high-transient-voltage environments. | Choose for cost-sensitive non-automotive designs where junction temperature stays below 125 °C and overvoltage stress is minimal. |
Compared with VS-MBR1545CT and MBR1545CT, the MBRS1545CTH offers superior thermal performance (2.0 °C/W), extended temperature capability (+150 °C), and built-in overvoltage protection via guard ring-making it the preferred choice for automotive-grade 45 V Schottky rectification where reliability and thermal headroom are critical.
Availability
MBRS1545CTH is available at Aetrix Electronics and suitable for automotive power conversion, industrial DC/DC supplies, and LED lighting systems requiring stable component supply, AEC-Q101 compliance, and high surge current resilience.
Supply support for MBRS1545CTH 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, specializing in high-reliability discrete devices for automotive and industrial markets.
The MBRS1545CTH belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for high-efficiency, high-temperature automotive power systems-including body electronics, lighting, and ADAS subsystems.
FAQ
What is the maximum junction temperature rating for MBRS1545CTH?
The MBRS1545CTH has a maximum junction temperature (TJ max) of +150 °C, verified per AEC-Q101 stress testing. This rating enables reliable operation in under-hood automotive environments where ambient temperatures exceed 105 °C, provided thermal design maintains junction temperature within this limit using the device's 2 °C/W RθJC and proper PCB copper area.
Is MBRS1545CTH pin-compatible with standard TO-263AB dual-diode rectifiers?
Yes, MBRS1545CTH uses the industry-standard TO-263AB (D2PAK) outline with three terminals: Anode 1, Common Cathode, and Anode 2. Its pinout matches JEDEC MO-211 and is mechanically and electrically compatible with other TO-263AB dual-Schottky rectifiers such as MBR1545CT and VS-MBR1545CT, enabling direct footprint reuse.
Does MBRS1545CTH require a heatsink in typical 15 A applications?
MBRS1545CTH does not require an external heatsink if mounted on ≥10 cm² of 2 oz copper with thermal vias to inner layers. Its 2 °C/W RθJC and low VF (0.84 V at 15 A) result in ~12.6 W dissipation; with 50 °C/W RθJA, junction rise would be ~630 °C-so PCB copper is essential. A dedicated heatsink is unnecessary if thermal design follows TSC's recommended pad layout.
What is the reverse leakage current of MBRS1545CTH at elevated temperature?
At 45 V reverse bias and TJ = 125 °C, the MBRS1545CTH exhibits a maximum reverse leakage current (IR) of 15 mA per diode, as specified in the datasheet. This value is critical for reverse-battery protection circuits, where leakage directly impacts standby current and battery drain in always-on automotive modules.
How does the guard ring in MBRS1545CTH improve reliability?
The guard ring in MBRS1545CTH mitigates edge breakdown under transient overvoltage by redistributing electric field stress away from the active junction periphery. This structure enhances ruggedness against ISO 7637-2 load dump pulses and improves long-term stability in automotive applications where voltage spikes up to 100 V may occur-directly contributing to its AEC-Q101 qualification.
MBRS1545CTH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 840 mV @ 15 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263AB (D2PAK)
MBRS1545CTH FAQ
1.How can I place an order for MBRS1545CTH through Aetrix?
Please submit a Request for Quotation (RFQ) for MBRS1545CTH 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 MBRS1545CTH reliable?
The price and inventory of MBRS1545CTH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MBRS1545CTH is usually 5 days.
3.What payment methods are accepted for MBRS1545CTH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MBRS1545CTH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MBRS1545CTH?
MBRS1545CTH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MBRS1545CTH 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 MBRS1545CTH?
For technical support, including MBRS1545CTH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MBRS1545CTH requirements.
6.How does Aetrix verify that MBRS1545CTH is sourced from the original manufacturer or authorized distributors?
All MBRS1545CTH 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 MBRS1545CTH meets industry standards.
7.What is the process for return or replacement of MBRS1545CTH?
All MBRS1545CTH units undergo pre-shipment inspection (PSI). If there is an issue with MBRS1545CTH, 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 MBRS1545CTH part is unused and in its original packaging.
Return procedure for MBRS1545CTH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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