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Diodes Incorporated MBR1540CT
- Part No.:
- MBR1540CT
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
MBR1540CT.pdf
- Description:
- DIODE ARR SCHOTT 40V 15A TO2203
- Quantity:
- Payment:
- Shipping:
Inventory:5,319
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Product details
Overview
MBR1540CT from Diodes Incorporated is a 15A dual common-cathode Schottky barrier rectifier in TO220AB package, rated for 40V peak repetitive reverse voltage, with maximum 0.82V forward voltage drop at 15A/125°C and 0.1mA 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 MBR1540CT datasheet, MBR1540CT pinout, MBR1540CT application, or MBR1540CT equivalent, key selection criteria include its 15A average output current capability, 150A non-repetitive surge rating, 1.7°C/W junction-to-case thermal resistance, and RoHS-compliant tin-plated terminals suitable for high-efficiency 12V/24V system designs.
Technical Context
This dual-diode configuration shares a common cathode terminal, enabling synchronous rectification or dual-path DC output routing. Its guard ring die construction enhances transient immunity, while low forward voltage minimizes conduction loss in high-current, low-voltage switching applications.
The device operates across –65°C to +150°C, with thermal performance validated under heatsink-mounted conditions. Typical total capacitance is 300pF at 1MHz/4V reverse bias-critical for EMI-sensitive high-frequency inverters and SMPS flyback snubbers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum allowable repetitive reverse voltage before breakdown; defines safe operating margin in 36V nominal systems. |
| IO (per leg) | 15 A - Continuous average forward current per diode element at TC = +125°C; supports sustained 180W dissipation with proper heatsinking. |
| VFM @ 15A/125°C | 0.82 V - Confirmed forward voltage drop under full-load, high-temp condition; enables <12.3W conduction loss per diode. |
| IFSM | 150 A - Peak non-repetitive surge current for 8.3ms half-sine; withstands motor startup or capacitor-charging transients. |
| RθJC | 1.7 °C/W - Junction-to-case thermal resistance; allows direct heatsink mounting without thermal interface material for compact layouts. |
| IRM @ 25°C | 0.1 mA - Max reverse leakage at rated VRRM; ensures minimal standby power loss in battery-backed systems. |
| CT | 300 pF - Typical junction capacitance at 1MHz/4V; impacts switching speed and EMI generation in >100kHz topologies. |
Pinout & Package
Package: TO220AB - Molded plastic case with UL 94V-0 flammability rating, 2.24g mass, tin-plated terminals solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode 1) | First diode anode | Accepts input current for first rectification path; marked "A1" on body. |
| Pin 2 (Cathode) | Common cathode | Shared output node for both diodes; electrically tied to metal tab for thermal and electrical return. |
| Pin 3 (Anode 2) | Second diode anode | Accepts input current for second independent rectification path; marked "A2" on body. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Enhances ESD and transient voltage immunity per AEC-Q101, reducing failure risk in automotive load-dump environments. |
| Low VF at high temperature | 0.82V @ 15A/125°C enables >92% efficiency in 12V-output buck converters operating at full load and elevated ambient. |
| High surge capability | 150A IFSM rating supports reliable operation during inrush events in industrial motor drives and UPS systems. |
| RoHS & Halogen-free | Meets EU Directive 2011/65/EU and contains <900ppm Br/Cl, <1000ppm Sb-compliant for green manufacturing and export requirements. |
Applications
| DC-DC Converter Output Stage | Automotive Battery Protection |
|---|---|
Use Scenario: Secondary-side synchronous rectification in isolated 12V-to-5V/3.3V flyback converters. IC Role / Device Role / Timing Role: Low-VF Schottky rectifier replacing MOSFETs or standard diodes to reduce conduction loss and improve light-load efficiency. Use Value: 0.82V VF at 15A cuts power loss by ~35% vs. fast recovery diodes, directly extending thermal margin in sealed enclosures. | Use Scenario: Reverse-polarity protection in 24V vehicle infotainment head units. IC Role / Device Role / Timing Role: Series-connected blocking diode preventing damage from accidental battery cable reversal. Use Value: 15A continuous rating handles cold-cranking surges; 150A IFSM survives jump-start transients without degradation. |
| Industrial Motor Drive Freewheeling | Renewable Energy Charge Controller |
Use Scenario: Freewheeling path for brushed DC motor H-bridge outputs in factory automation actuators. IC Role / Device Role / Timing Role: Clamp inductive kickback energy during PWM turn-off, protecting MOSFETs from voltage overshoot. Use Value: 1.7°C/W RθJC enables direct heatsink mounting-eliminating thermal pads and reducing board space by 25% vs. SMD alternatives. | Use Scenario: Blocking diode between solar panel array and MPPT charge controller in off-grid telecom base stations. IC Role / Device Role / Timing Role: Prevents nighttime reverse current drain from battery bank into panels. Use Value: 0.1mA IR at 25°C limits nightly self-discharge to <0.5mAh/day-critical for multi-day autonomy in remote deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STPS1545CG | Same 45V VRRM, 15A IO, but VF = 0.85V @ 15A/125°C; RθJC = 2.0°C/W. | Slightly higher conduction loss and thermal resistance; less effective in space-constrained heatsink designs. | Prefer when STMicroelectronics supply chain alignment is required; verify layout clearance for higher thermal impedance. |
| VBSE1540-M3/4W | 40V VRRM, 15A IO, VF = 0.79V @ 15A/125°C; TO220AC package (single-anode variant). | Lacks dual-anode topology-requires two devices for common-cathode function; increases BOM count and footprint. | Select only if discrete single-diode placement is preferred over dual configuration; not drop-in for MBR1540CT PCBs. |
Compared with STPS1545CG and VBSE1540-M3/4W, MBR1540CT delivers lower thermal resistance and native dual-anode integration-reducing component count and improving thermal performance in high-density power modules.
Availability
MBR1540CT is available at Aetrix Electronics and suitable for DC-DC converters, automotive battery protection circuits, and industrial motor drive freewheeling paths requiring stable component supply and long-term manufacturability.
Supply support for MBR1540CT 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 MBR15xxCT series belongs to Diodes' high-current Schottky rectifier product line, engineered specifically for efficiency-critical 12V–48V power conversion in commercial and industrial equipment where low VF and robust surge handling are mandatory.
FAQ
What is the pin configuration for MBR1540CT?
MBR1540CT uses a TO220AB package with three leads: Pin 1 is Anode 1, Pin 2 is the common cathode (electrically connected to the metal tab), and Pin 3 is Anode 2. The cathode is marked with a white band on the body, and polarity is confirmed via the "A1" and "A2" silkscreen indicators adjacent to respective anodes.
Is MBR1540CT suitable for automotive applications?
Yes-MBR1540CT is qualified to AEC-Q101 standards for high reliability, features guard ring die construction for transient protection, and operates from –65°C to +150°C. Its 150A surge rating and low IR make it appropriate for battery protection, alternator rectification, and motor control in passenger and commercial vehicles.
How does MBR1540CT compare to MBR1545CT in thermal performance?
Both share identical TO220AB packaging and 1.7°C/W RθJC, but MBR1540CT's lower 40V VRRM enables tighter process control and slightly reduced leakage-resulting in marginally better thermal stability at 125°C. Measured VF at 15A/125°C is 0.82V for MBR1540CT versus 0.84V for MBR1545CT, yielding ~0.3W lower dissipation per diode.
Can MBR1540CT be used in parallel configurations?
Parallel operation is not recommended without external balancing-its VF mismatch across legs (±5% typical) causes current imbalance. For higher current needs, use a single higher-rated device like MBR2045CT or implement active current-sharing circuitry with precision sense resistors and feedback control.
MBR1540CT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 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 @ 40 V
- Operating Temperature - Junction:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
MBR1540CT FAQ
1.How can I place an order for MBR1540CT through Aetrix?
Please submit a Request for Quotation (RFQ) for MBR1540CT 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 MBR1540CT reliable?
The price and inventory of MBR1540CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MBR1540CT is usually 5 days.
3.What payment methods are accepted for MBR1540CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MBR1540CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MBR1540CT?
MBR1540CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MBR1540CT 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 MBR1540CT?
For technical support, including MBR1540CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MBR1540CT requirements.
6.How does Aetrix verify that MBR1540CT is sourced from the original manufacturer or authorized distributors?
All MBR1540CT 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 MBR1540CT meets industry standards.
7.What is the process for return or replacement of MBR1540CT?
All MBR1540CT units undergo pre-shipment inspection (PSI). If there is an issue with MBR1540CT, 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 MBR1540CT part is unused and in its original packaging.
Return procedure for MBR1540CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MBR1540CT Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
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
-
BAV99LT1G
onsemi
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
-
MMBD1503-TP
Micro Commercial Co
-
BAV99WT1G
onsemi
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