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SMC Diode Solutions MBR1545CT
- Part No.:
- MBR1545CT
- Manufacturer:
- SMC Diode Solutions
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
MBR1545CT.pdf
- Description:
- DIODE ARRAY SCHOTTKY 45V TO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:10,243
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Product details
Overview
MBR1545CT from Diodes Incorporated is a 15A dual common-cathode Schottky barrier rectifier in TO220AB package, rated for 45V peak repetitive reverse voltage, 0.84V max forward voltage at 15A/25°C, and 0.1mA max reverse leakage at 25°C. It serves as a low-loss freewheeling or polarity protection diode in DC-DC converters and industrial power supplies.
For engineers reviewing the MBR1545CT datasheet, MBR1545CT pinout, MBR1545CT application, or MBR1545CT equivalent, key selection criteria include its 15A average forward current at 125°C case temperature, 150A non-repetitive surge rating, 1.7°C/W junction-to-case thermal resistance, and AEC-Q101 qualification for high-reliability automotive and industrial use.
Technical Context
This dual-diode Schottky rectifier integrates two independent anode terminals sharing one cathode, enabling synchronous rectification or dual-path DC output management. Its guard ring die construction enhances transient immunity, while low forward voltage drop directly reduces conduction losses in high-current, low-voltage (<5V) rails.
The device operates across –65°C to +150°C junction temperature range and exhibits 300pF typical junction capacitance at 1MHz/4V reverse bias - critical for minimizing switching noise in high-frequency inverters and SMPS freewheeling paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum allowable repetitive reverse voltage before breakdown; sets safe operating limit in 36V nominal systems. |
| IO (per leg) | 15 A @ TC = +125°C - Continuous forward current per diode element with heatsink; defines thermal design margin. |
| VF Max | 0.84 V @ IF = 15A, TC = +25°C - Directly determines conduction loss (12.6W per diode at full load), impacting efficiency and heatsink sizing. |
| IRM | 0.1 mA @ VR = 45V, TC = +25°C - Low leakage preserves battery backup integrity and minimizes standby power loss. |
| IFSM | 150 A (8.3ms half-sine) - Withstands inrush surges during hot-plug or capacitor charging without failure. |
| RθJC | 1.7 °C/W - Enables precise junction temperature estimation when mounted on heatsink; critical for reliability modeling. |
| CT | 300 pF @ 1MHz, 4V - Limits high-frequency displacement current; affects EMI behavior in >100kHz switching topologies. |
Pinout & Package
TO220AB package: 3-terminal molded plastic case with isolated tab (cathode-connected), UL 94V-0 flammability rating, tin-plated leads solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode A) | First anode terminal | Independent input path for dual-output or parallel rectification; electrically isolated from Pin 2. |
| Pin 2 (Cathode) | Common cathode node | Shared return path for both diodes; connected to metal tab for thermal conduction and electrical grounding. |
| Pin 3 (Anode B) | Second anode terminal | Second independent input; enables dual-source redundancy or split-rail freewheeling without external wiring. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Improves ruggedness against voltage transients and ESD events without external clamping components. |
| Low VF at high current | 0.84V @ 15A/25°C reduces power dissipation by ~30% vs. comparable silicon rectifiers, lowering thermal stress. |
| AEC-Q101 qualification | Validated for automotive under-hood applications including engine control modules and ADAS power stages. |
| Lead-free & Green compliant | Meets RoHS 2 and halogen/antimony-free requirements (<900ppm Br/Cl, <1000ppm Sb) for global environmental compliance. |
| High surge capability | 150A IFSM supports robust operation during cold-crank or load-dump conditions in 12V/24V vehicle systems. |
Applications
| DC-DC Converter Freewheeling | Automotive Polarity Protection |
|---|---|
Use Scenario: Used as synchronous rectifier in 5V/12V buck converter output stage operating at 200–500kHz. IC Role / Device Role / Timing Role: Freewheeling diode conducting during low-side switch off-time; replaces MOSFET body diode to reduce conduction loss. Use Value: 0.84V VF cuts conduction loss by 40% vs. standard silicon diode, improving full-load efficiency from 88% to 92%. | Use Scenario: Installed in-line between battery and ECU input to prevent damage from reverse battery connection. IC Role / Device Role / Timing Role: Unidirectional current gate blocking reverse polarity; conducts only during correct battery orientation. Use Value: 0.1mA IR at 25°C ensures negligible standby drain; AEC-Q101 rating guarantees operation at –40°C to +125°C ambient. |
| Industrial Power Supply OR-ing | UPS Inverter Output Stage |
Use Scenario: Dual MBR1545CT units used in OR-ing configuration for redundant 24V DC inputs feeding PLC backplane. IC Role / Device Role / Timing Role: Each diode isolates one supply rail; prevents backfeed and enables seamless switchover. Use Value: Common-cathode topology simplifies PCB layout with single heatsink mounting; 15A rating supports 30A total system current. | Use Scenario: Mounted on heatsink in single-phase 230VAC inverter output bridge for solar micro-inverters. IC Role / Device Role / Timing Role: Freewheeling path for inductive load current during PWM dead-time intervals. Use Value: 150A IFSM withstands motor startup surges; 300pF CT minimizes high-frequency ringing and EMI emissions. |
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-15BQ045 | Same 45V VRRM and 15A IO, but VF = 0.72V @ 15A/125°C (lower conduction loss at elevated temp). | Higher thermal performance in sustained high-temp environments (>100°C case); less suitable for cost-sensitive consumer designs. | Select for thermally constrained automotive or industrial enclosures where long-term derating is critical. |
| ON Semiconductor MBR1545CTG | Identical electrical specs and TO220AB package; differs only in green marking and traceability documentation. | No functional difference; qualified to same AEC-Q101 standard and RoHS requirements. | Drop-in replacement where supply chain diversification or alternate logistics is required. |
Compared with VS-15BQ045 and MBR1545CTG, the Diodes Incorporated MBR1545CT offers optimal balance of cost, proven field reliability in automotive ECUs, and consistent 0.84V VF at room temperature - making it preferred for mid-tier industrial power supplies where thermal margin exceeds 20°C.
Availability
MBR1545CT is available at Aetrix Electronics and suitable for DC-DC converters, automotive polarity protection circuits, and industrial OR-ing power supplies requiring stable component supply and AEC-Q101-compliant sourcing.
Supply support for MBR1545CT 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
The MBR1545CT belongs to Diodes' high-current Schottky rectifier product line, engineered for low-loss power conversion in automotive, industrial, and computing applications where efficiency and thermal robustness are critical.
FAQ
Is the MBR1545CT pin-compatible with the MBR1560CT?
Yes - both share identical TO220AB package, pinout (Anode–Cathode–Anode), and mechanical footprint. The only difference is VRRM rating: 45V for MBR1545CT versus 60V for MBR1560CT. Electrical substitution requires verifying that 45V reverse margin suffices for the target circuit's worst-case transient conditions.
Can the metal tab be electrically isolated from the cathode?
No - in the TO220AB package, the metal tab is internally bonded to the cathode terminal (Pin 2). Any insulating washer or pad must account for this short; isolation requires external mounting hardware with dielectric interface, not internal separation.
What is the maximum recommended case temperature for continuous 15A operation?
The datasheet specifies 15A average forward current at TC = +125°C. Operation above this temperature requires derating per Figure 1 - at +135°C case, maximum sustainable current drops to approximately 12.5A. Heatsink design must maintain TC ≤ 125°C under worst-case ambient and airflow conditions.
Does the MBR1545CT support bidirectional current flow?
No - it is a unidirectional Schottky rectifier. Current flows only from anode to cathode. Reverse conduction is blocked up to 45V VRRM; attempting reverse bias beyond this risks avalanche breakdown and permanent damage. It cannot function as a bidirectional switch or AC rectifier without external circuitry.
MBR1545CT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- SMC Diode Solutions
- Series:
- -
- Package/Case:
- TO-220-3
- 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):
- -
- Voltage - Forward (Vf) (Max) @ If:
- 840 mV @ 15 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 mA @ 45 V
- Operating Temperature - Junction:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AB
MBR1545CT FAQ
1.How can I place an order for MBR1545CT through Aetrix?
Please submit a Request for Quotation (RFQ) for MBR1545CT 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 MBR1545CT reliable?
The price and inventory of MBR1545CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MBR1545CT is usually 5 days.
3.What payment methods are accepted for MBR1545CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MBR1545CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MBR1545CT?
MBR1545CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MBR1545CT 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 MBR1545CT?
For technical support, including MBR1545CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MBR1545CT requirements.
6.How does Aetrix verify that MBR1545CT is sourced from the original manufacturer or authorized distributors?
All MBR1545CT 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 MBR1545CT meets industry standards.
7.What is the process for return or replacement of MBR1545CT?
All MBR1545CT units undergo pre-shipment inspection (PSI). If there is an issue with MBR1545CT, 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 MBR1545CT part is unused and in its original packaging.
Return procedure for MBR1545CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MBR1545CT Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
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BAV99,215
Nexperia USA Inc.
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BAT54SLT1G
onsemi
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BAV70LT1G
onsemi
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BAT54CLT1G
onsemi
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BAT54S-7-F
Diodes Incorporated
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BAV99LT1G
onsemi
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BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
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MMBD1503-TP
Micro Commercial Co
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BAV99WT1G
onsemi
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