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Taiwan Semiconductor Corporation MBRAD845H
- Part No.:
- MBRAD845H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
MBRAD845H.pdf
- Description:
- 8A, 45V, SCHOTTKY RECTIFIER
- Quantity:
- Payment:
- Shipping:
Inventory:4,298
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Product details
Overview
MBRAD845H from Taiwan Semiconductor is an AEC-Q101-qualified 8A, 45V Schottky barrier rectifier in ThinDPAK package, optimized for low forward voltage (0.60 V at 8A/25°C) and high surge capability (150 A @ 8.3 ms), used in automotive DC/DC converters and reverse battery protection circuits.
For engineers reviewing the MBRAD845H datasheet, MBRAD845H pinout, MBRAD845H application, or MBRAD845H equivalent, key selection criteria include junction-to-lead thermal resistance (2.4 °C/W), moisture sensitivity level 1 compliance, and TJ max rating of 150°C in automotive-grade surface-mount power rectification.
Technical Context
The MBRAD845H employs a single-die Schottky structure with metal–semiconductor junction enabling fast switching and zero recovery charge. Its 45 V repetitive peak reverse voltage and 150 A surge rating support robust operation in transient-heavy automotive power rails.
Thermal performance is defined by RθJL = 2.4 °C/W (with ideal heatsink) and RθJA = 12.6 °C/W on 2" × 3" × 0.25" aluminum plate, enabling sustained 8 A conduction at ≤125°C junction temperature under proper PCB copper area design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum continuous reverse blocking voltage without breakdown |
| IF | 8 A - Continuous average forward current at TL = 115°C on standard PCB |
| IFSM | 150 A - Non-repetitive surge current tolerance for 8.3 ms half-sine waveform |
| VF @ 8A/25°C | 0.60 V - Forward voltage drop determining conduction loss in high-current paths |
| RθJL | 2.4 °C/W - Thermal resistance from junction to lead, critical for solder-joint reliability |
| TJ max | +150°C - Maximum allowable junction temperature supporting under-hood automotive use |
| CJ | 384 pF @ 4 V - Junction capacitance affecting high-frequency switching noise and EMI |
Pinout & Package
Package: ThinDPAK (JEDEC TO-252 variation AE), surface-mount, single-anode/single-cathode configuration with cathode band marking. Matte tin-plated leads, moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Input current entry point | Connected to source-side rail (e.g., battery positive or switch node) |
| Pin 2 (Cathode) | Output current exit point | Connected to load or return path; marked with cathode band |
| Pin 3 (Tab / Drain) | Thermal & electrical connection | Exposed copper pad tied internally to cathode; must be soldered to large copper pour for thermal management |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including temperature cycling, HTRB, and ESD testing per stress test plan |
| Low VF at high IF | 0.60 V @ 8A/25°C reduces conduction losses by >30% vs. comparable Si diodes in 12 V systems |
| High IFSM | 150 A surge rating enables reliable operation during load dump or cranking transients |
| ThinDPAK thermal performance | RθJL = 2.4 °C/W allows direct heat transfer to PCB ground plane without external heatsink |
| Halogen-free & RoHS | Complies with automotive environmental standards and end-of-life recycling requirements |
Applications
| Automotive DC/DC Converters | Reverse Battery Protection |
|---|---|
Use Scenario: Step-down conversion from 12 V battery to 3.3 V/5 V rails in infotainment and ADAS ECUs. IC Role / Device Role / Timing Role: Output rectifier in synchronous or asynchronous buck topology. Use Value: Low VF minimizes power loss at 5–8 A loads; AEC-Q101 ensures reliability across -40°C to +125°C ambient. | Use Scenario: Preventing damage when battery terminals are accidentally reversed during service. IC Role / Device Role / Timing Role: Series-connected Schottky diode blocking reverse current flow into system electronics. Use Value: 45 V VRRM withstands jump-start surges; 150 A IFSM survives momentary short-circuit events. |
| Car Lighting Systems | Freewheeling in Motor Drivers |
Use Scenario: LED headlamp drivers requiring efficient, compact rectification in tight thermal envelopes. IC Role / Device Role / Timing Role: Freewheeling path for inductive current decay in constant-current LED regulators. Use Value: ThinDPAK footprint saves board space; 150°C TJ max supports sealed lamp housing temperatures. | Use Scenario: Clamping inductive kickback in 12 V wiper, seat, or HVAC motor control modules. IC Role / Device Role / Timing Role: Fast-recovery freewheeling diode across brushed DC motor windings. Use Value: Zero reverse recovery charge eliminates switching spikes; 384 pF CJ limits capacitive coupling noise. |
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-MBRB845TRR-M3 | Same 8A/45V rating; RθJA = 13.5 °C/W; slightly higher VF (0.62 V @ 8A) | Identical AEC-Q101 qualification; identical ThinDPAK package and pinout | Drop-in replacement where marginally higher thermal resistance is acceptable |
| ON Semiconductor MBR845CT | Dual common-cathode configuration; 8A per die; VF = 0.63 V @ 8A; RθJA = 15.0 °C/W | Requires PCB layout change due to TO-220AB package and dual-diode topology | Only suitable when dual-diode function or through-hole mounting is required |
Compared with MBRAD845H, VS-MBRB845TRR-M3 offers near-identical thermal and electrical behavior in same-package form factor, while MBR845CT trades surface-mount compatibility for dual-diode integration-making MBRAD845H optimal for space-constrained, single-diode automotive rectification.
Availability
MBRAD845H is available at Aetrix Electronics and suitable for automotive DC/DC converters, reverse battery protection circuits, and car lighting systems requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for MBRAD845H 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 consumer markets since 1979.
The MBRAD845H belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for high-efficiency, thermally demanding automotive power conversion and protection functions.
FAQ
What is the maximum junction temperature rating for the MBRAD845H?
The MBRAD845H has a maximum junction temperature (TJ) rating of +150°C, validated per AEC-Q101 stress testing. This 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 specified RθJL = 2.4 °C/W path.
Is the MBRAD845H pin-compatible with other ThinDPAK Schottky rectifiers?
Yes, the MBRAD845H uses standard JEDEC TO-252 variation AE pinout (anode–cathode–tab), matching industry-standard ThinDPAK footprints. Its Pin 1 (anode), Pin 2 (cathode), and Pin 3 (exposed cathode tab) align mechanically and electrically with compatible parts like VS-MBRB845TRR-M3, enabling direct PCB substitution where thermal and electrical specs permit.
Does the MBRAD845H meet automotive reliability standards?
Yes, the MBRAD845H is fully AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and electrostatic discharge (ESD). It also complies with J-STD-020 moisture sensitivity level 1 and JESD201 whisker testing, confirming suitability for automotive production assembly and field operation.
What is the forward voltage of the MBRAD845H at 8 A and 125°C?
The MBRAD845H exhibits a typical forward voltage of 0.53 V and a maximum of 0.62 V at 8 A and 125°C junction temperature. This low, temperature-stable VF ensures consistent conduction loss in high-ambient automotive applications such as engine control units and body electronics.
How is thermal management implemented for the MBRAD845H in PCB layout?
Thermal management for the MBRAD845H relies on soldering its exposed cathode tab (Pin 3) to a minimum 2" × 3" × 0.25" aluminum plate or equivalent copper pour area. With RθJA = 12.6 °C/W under that condition, the design must allocate sufficient copper area and via count to maintain TJ ≤ 150°C at full 8 A load, especially in sealed enclosures.
MBRAD845H 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):
- 8A
- Voltage - Forward (Vf) (Max) @ If:
- 700 mV @ 8 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 45 V
- Capacitance @ Vr, F:
- 384pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- ThinDPAK
- Operating Temperature - Junction:
- -55°C ~ 150°C
MBRAD845H FAQ
1.How can I place an order for MBRAD845H through Aetrix?
Please submit a Request for Quotation (RFQ) for MBRAD845H 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 MBRAD845H reliable?
The price and inventory of MBRAD845H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MBRAD845H is usually 5 days.
3.What payment methods are accepted for MBRAD845H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MBRAD845H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MBRAD845H?
MBRAD845H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MBRAD845H 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 MBRAD845H?
For technical support, including MBRAD845H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MBRAD845H requirements.
6.How does Aetrix verify that MBRAD845H is sourced from the original manufacturer or authorized distributors?
All MBRAD845H 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 MBRAD845H meets industry standards.
7.What is the process for return or replacement of MBRAD845H?
All MBRAD845H units undergo pre-shipment inspection (PSI). If there is an issue with MBRAD845H, 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 MBRAD845H part is unused and in its original packaging.
Return procedure for MBRAD845H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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