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Taiwan Semiconductor Corporation MBRAD1545H
- Part No.:
- MBRAD1545H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
MBRAD1545H.pdf
- Description:
- 15A, 45V, SCHOTTKY RECTIFIER
- Quantity:
- Payment:
- Shipping:
Inventory:4,340
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Product details
Overview
MBRAD1545H from Taiwan Semiconductor is a 15 A, 45 V Schottky barrier rectifier in ThinDPAK package, designed for low-loss DC/DC conversion and reverse battery protection in automotive electronics. It features 0.55 V forward voltage at 15 A/25°C, 250 A surge capability, and AEC-Q101 qualification for under-hood reliability.
For engineers reviewing the MBRAD1545H datasheet, MBRAD1545H pinout, MBRAD1545H application, or MBRAD1545H equivalent, key selection criteria include thermal resistance (RθJL = 2.2°C/W), junction temperature range (–55°C to +150°C), moisture sensitivity level (MSL-1), and cathode-band polarity marking for automated assembly verification.
Technical Context
This single-die Schottky rectifier operates with minimal conduction loss due to its low VF and high IF rating, enabling efficient power conversion in space-constrained automotive modules. Its 745 pF junction capacitance at 4 V supports high-frequency switching up to several hundred kHz without excessive capacitive turn-off loss.
The device uses matte tin-plated leads compliant with J-STD-002 solderability and meets JESD201 Class 2 whisker resistance. Thermal performance is specified with ideal heat sink (RθJL) and on 2"×3" Al-plate (RθJA = 12°C/W), supporting design-in for thermally demanding environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF | 15 A continuous forward current - supports high-current DC/DC stages without forced air cooling |
| VRRM | 45 V repetitive peak reverse voltage - suitable for 12 V/24 V automotive systems with load dump margin |
| VF @ 15A/25°C | 0.55 V max - reduces conduction loss by ~30% vs. comparable silicon diodes in same package |
| IFSM (8.3 ms) | 250 A surge rating - withstands motor startup and inductive kick transients in car lighting circuits |
| RθJL | 2.2 °C/W - enables direct thermal coupling to PCB copper pour for passive heatsinking |
| CJ @ 4 V | 745 pF - limits displacement current in high-dV/dt freewheeling paths |
| TJ Range | –55°C to +150°C - qualified for engine bay mounting per AEC-Q101 stress test conditions |
Pinout & Package
Package: ThinDPAK (JEDEC TO-252 variation AE), surface-mount, single-anode/single-cathode configuration. Cathode indicated by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Input current path during forward conduction | Connected to source-side of switching node; requires low-inductance trace routing |
| Pin 2 (Cathode) | Output current path during forward conduction | Marked with cathode band; ties to ground or return rail in reverse-battery protection |
| Pin 3 (Tab / Drain) | Thermal and electrical connection to cathode | Exposed metal tab is electrically connected to cathode; must be soldered to large copper area for RθJL benefit |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, HTRB, and ESD testing |
| MSL-1 rating | Zero bake requirement before reflow; compatible with standard SMT assembly lines |
| Halogen-free & RoHS | Meets EU Directive 2011/65/EU and IPC-1752A material declaration requirements |
| Junction-to-lead thermal resistance | 2.2°C/W enables >10 W dissipation with 22°C rise over lead temperature |
| Matte tin plating | Guarantees solder wetting per J-STD-002, eliminating post-reflow cleaning concerns |
Applications
| Car Lighting Power Supply | 12 V Reverse Battery Protection |
|---|---|
Use Scenario: LED headlamp driver with buck converter operating in harsh ambient (–40°C to +125°C). IC Role / Device Role / Timing Role: Freewheeling diode in synchronous rectification stage, conducting during low-side switch off-time. Use Value: Low VF minimizes power loss at 15 A peak, reducing thermal stress on PCB copper and extending LED lifetime. | Use Scenario: Infotainment head unit powered from vehicle battery with risk of reverse polarity connection. IC Role / Device Role / Timing Role: Series-blocking diode placed between battery input and system PMIC, conducting only during correct polarity. Use Value: 45 V VRRM provides 2× margin over 12 V nominal; 250 A IFSM survives jump-start surges without failure. |
| Automotive DC/DC Converter | Inverter Freewheeling Diode |
Use Scenario: 48 V-to-12 V bidirectional converter in mild hybrid architecture. IC Role / Device Role / Timing Role: Output rectifier in non-synchronous buck stage, handling continuous 15 A output current. Use Value: RθJL = 2.2°C/W allows direct thermal transfer to chassis-mounted heatsink, avoiding thermal derating at full load. | Use Scenario: 3-phase inverter driving HVAC blower motor in electric vehicle cabin system. IC Role / Device Role / Timing Role: Freewheeling path for inductive back-EMF during PWM dead-time intervals. Use Value: 745 pF CJ limits reverse recovery charge, reducing shoot-through risk and EMI generation at 20 kHz switching. |
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 | TO-220AC package; higher RθJA (40°C/W); no AEC-Q101 qualification | Requires heatsink for 15 A operation; limited to industrial/non-automotive use | Choose when mechanical mounting constraints favor through-hole and automotive qualification is not required |
| ON Semiconductor MBR1545CT | TO-220AB package; dual-die configuration; VF = 0.65 V max at 15 A | Higher conduction loss; unsuitable for thermally constrained automotive modules | Consider only if existing board layout uses TO-220 footprint and efficiency targets allow +0.1 V VF penalty |
Compared with VS-MBR1545CT and MBR1545CT, the MBRAD1545H delivers lower thermal resistance, automotive-grade reliability, and surface-mount compatibility - critical for compact, high-reliability automotive power stages where board space and under-hood temperature are limiting factors.
Availability
MBRAD1545H is available at Aetrix Electronics and suitable for automotive lighting, reverse battery protection, and DC/DC converter designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MBRAD1545H 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 global automotive, industrial, and consumer markets since 1979.
The MBRAD1545H belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in automotive subsystems such as body control modules and ADAS power supplies.
FAQ
What is the marking code printed on the MBRAD1545H device?
The MBRAD1545H carries the laser-marked code "1545" on its top surface, indicating its voltage and current rating per Taiwan Semiconductor's internal marking convention. This matches the part number suffix and is visible under 10× magnification. The cathode band is located adjacent to the marking, confirming terminal polarity during visual inspection or AOI setup.
Is the MBRAD1545H suitable for reflow soldering in lead-free processes?
Yes, the MBRAD1545H is qualified for lead-free reflow per J-STD-020, with MSL-1 rating meaning it can be stored indefinitely at ≤30°C/60% RH without baking. Its matte tin-plated leads meet J-STD-002 solderability requirements, ensuring reliable wetting during peak temperatures up to 260°C for ≤60 seconds.
How does the thermal performance of MBRAD1545H compare to standard TO-252 devices?
The MBRAD1545H achieves RθJL = 2.2°C/W due to optimized die attach and exposed cathode tab design - significantly lower than typical TO-252 Schottkys (RθJL ≈ 3.5–4.5°C/W). This allows 20–30% higher power dissipation at equal temperature rise when mounted on 2 oz copper with thermal vias.
Does the MBRAD1545H have a specified reverse recovery time (trr)?
No - the MBRAD1545H is a Schottky barrier diode and exhibits majority-carrier conduction, so it has no reverse recovery time. Its switching behavior is governed by junction capacitance (CJ = 745 pF) and series resistance, making it inherently faster and more efficient than PN-junction rectifiers in high-frequency applications.
Can the MBRAD1545H be used in parallel configurations for higher current handling?
Parallel operation is not recommended unless external ballasting resistors are used. The MBRAD1545H has a negative temperature coefficient for VF, causing current imbalance at elevated junction temperatures. For >15 A applications, select a higher-rated single device or verify derating curves and thermal coupling in the final layout before paralleling MBRAD1545H units.
MBRAD1545H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io):
- 15A
- Voltage - Forward (Vf) (Max) @ If:
- 630 mV @ 15 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 200 µA @ 45 V
- Capacitance @ Vr, F:
- 745pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- ThinDPAK
- Operating Temperature - Junction:
- -55°C ~ 150°C
MBRAD1545H FAQ
1.How can I place an order for MBRAD1545H through Aetrix?
Please submit a Request for Quotation (RFQ) for MBRAD1545H 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 MBRAD1545H reliable?
The price and inventory of MBRAD1545H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MBRAD1545H is usually 5 days.
3.What payment methods are accepted for MBRAD1545H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MBRAD1545H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MBRAD1545H?
MBRAD1545H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MBRAD1545H 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 MBRAD1545H?
For technical support, including MBRAD1545H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MBRAD1545H requirements.
6.How does Aetrix verify that MBRAD1545H is sourced from the original manufacturer or authorized distributors?
All MBRAD1545H 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 MBRAD1545H meets industry standards.
7.What is the process for return or replacement of MBRAD1545H?
All MBRAD1545H units undergo pre-shipment inspection (PSI). If there is an issue with MBRAD1545H, 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 MBRAD1545H part is unused and in its original packaging.
Return procedure for MBRAD1545H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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