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Diodes Incorporated MBRB1540CT-T
- Part No.:
- MBRB1540CT-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
MBRB1540CT-T.pdf
- Description:
- DIODE ARR SCHOTT 40V 15A TO263AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,549
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Product details
Overview
MBRB1540CT-T from Diodes Incorporated is a 15A dual common-cathode surface-mount Schottky barrier rectifier in D²PAK (TO-263) package, rated for 40V peak repetitive reverse voltage, 0.7V forward voltage at 7.5A per element, and 150A non-repetitive surge current. It delivers low power loss and high efficiency in DC-DC converter outputs, freewheeling paths, and polarity protection circuits.
For engineers reviewing the MBRB1540CT-T datasheet, MBRB1540CT-T pinout, MBRB1540CT-T application, or MBRB1540CT-T equivalent, key selection criteria include its 40V VRRM rating, dual common-cathode configuration, 3.0°C/W junction-to-terminal thermal resistance, 30ns reverse recovery time, and RoHS-compliant tin-plated terminals.
Technical Context
This device integrates two independent Schottky diodes sharing a common cathode terminal, enabling synchronous rectification or dual-path DC output management. Its guard ring die construction enhances transient immunity, while the D²PAK package supports high-current thermal dissipation with 1.7g mass and UL 94V-0 mold compound.
Designed for operation up to +150°C junction temperature under 80% VRRM bias, it exhibits 250pF typical capacitance at 1MHz/4V reverse bias and withstands 10,000V/µs voltage transients-critical for switching regulator flyback and boost stage reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum peak reverse voltage each diode withstands without breakdown |
| IO (per element) | 15 A @ TC = 105°C - Continuous forward current capability per diode under case-heatsink conditions |
| VFM | 0.7 V @ IF = 7.5A - Low conduction loss enabling >90% efficiency in 5–12V output stages |
| IFSM | 150 A (8.3ms half-sine) - Surge tolerance for inrush and fault currents in power supplies |
| RθJT | 3.0 °C/W - Thermal resistance from junction to terminal, enabling direct heatsink mounting |
| trr | 30 ns - Fast recovery minimizes switching losses in 100–500kHz SMPS designs |
| CT | 250 pF @ 1MHz, 4V - Low junction capacitance reduces EMI in high-frequency rectification |
Pinout & Package
Package: D²PAK (TO-263), molded plastic case with UL 94V-0 flammability rating, 1.7g mass, and tin-plated terminals solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PIN 1 | Anode 1 | Input terminal for first Schottky diode; connects to high-side switch node or input rail |
| PIN 2 & 4 | Common Cathode | Shared cathode output node; electrically tied internally; used for DC output return path |
| PIN 3 | Anode 2 | Input terminal for second Schottky diode; enables dual-input or phase-split rectification |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Improves ESD and transient robustness without external TVS, reducing BOM count in industrial power rails |
| Low VFM (0.7V @ 7.5A) | Reduces conduction loss by ~35% vs. comparable 45V Schottkys, lowering thermal stress in compact enclosures |
| Dual common-cathode topology | Enables single-point output connection for dual-phase or redundant DC paths, simplifying PCB layout |
| 150A IFSM rating | Supports cold-start surges in 12V automotive auxiliary supplies without derating or parallel devices |
| RoHS-compliant tin finish | Ensures compatibility with lead-free reflow profiles and eliminates post-solder cleaning requirements |
Applications
| DC-DC Converter Output Rectification | Freewheeling Diode in Synchronous Buck Converters |
|---|---|
Use Scenario: Secondary-side rectification in 5V/12V isolated DC-DC modules for telecom and server PSUs. IC Role / Device Role / Timing Role: Dual-anode Schottky conducts during transformer secondary voltage polarity, delivering regulated output with minimal loss. Use Value: 0.7V VFM and 30ns trr reduce conduction and switching losses, improving full-load efficiency by 1.2–1.8% over standard FRDs. | Use Scenario: Freewheeling path across low-side MOSFET in 300kHz buck regulator powering FPGA core voltage. IC Role / Device Role / Timing Role: Provides continuous current path when high-side switch turns off, preventing inductive kickback. Use Value: 150A IFSM handles peak inductor current transients; 250pF CT limits ringing-induced EMI during turn-off edge. |
| Polarity Protection in 24V Industrial Inputs | OR-ing Diode in Redundant Power Supplies |
Use Scenario: Reverse-voltage blocking at main 24V DC input of PLC backplane with hot-swap capability. IC Role / Device Role / Timing Role: Anode connected to connector; cathode to system rail-blocks reverse connection while conducting forward. Use Value: 40V VRRM exceeds 24V nominal with 50% margin; 3.0°C/W RθJT allows direct heatsink mounting without thermal pads. | Use Scenario: OR-ing function between two 12V/15A AC-DC supplies feeding shared load in medical diagnostic equipment. IC Role / Device Role / Timing Role: Each anode connects to one supply; common cathode feeds load-enabling seamless switchover. Use Value: Dual-diode integration eliminates discrete pairing mismatch; 15A IO rating supports full-load redundancy without derating. |
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-M3/45 | 45V VRRM, 0.72V VFM @ 7.5A, same D²PAK package and dual common-cathode pinout | Higher reverse voltage margin suits 36V systems; slightly higher VFM increases conduction loss by ~30mW per diode | Select when design requires >40V blocking or operates near 36V nominal rails |
| ON Semiconductor MBR1540CT | Identical 40V/15A rating and D²PAK package but leaded TO-220 variant; no tape-and-reel packaging | Not suitable for automated SMT assembly; requires through-hole rework or manual placement | Choose only for prototyping or low-volume hand-soldered builds where reel feed is unavailable |
Compared with VS-MBR1545CT-M3/45 and MBR1540CT, MBRB1540CT-T offers optimal balance of 40V blocking, 0.7V conduction loss, and SMT-ready tape-and-reel delivery-making it preferred for volume production of 24–32V industrial DC-DC converters.
Availability
MBRB1540CT-T is available at Aetrix Electronics and suitable for DC-DC converter output rectification, freewheeling diode applications, and polarity protection circuits requiring stable component supply and RoHS-compliant manufacturing.
Supply support for MBRB1540CT-T 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.
This device belongs to Diodes' high-current Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in industrial, computing, and communications infrastructure.
FAQ
What is the maximum junction temperature for continuous operation?
The MBRB1540CT-T supports continuous operation up to +150°C junction temperature when reverse voltage is held at ≤80% of its 40V rating (i.e., ≤32V). At higher reverse bias, derating to ≤125°C is required per datasheet thermal guidelines.
Can this part replace a single-diode D²PAK Schottky in a freewheeling application?
Yes-only one anode (PIN 1 or PIN 3) and the common cathode (PINS 2 & 4) need to be used; the unused anode must be left floating or tied to cathode via a small resistor to prevent parasitic oscillation in high-dI/dt environments.
Is the D²PAK package thermally compatible with standard TO-263 footprints?
Yes-the D²PAK outline matches JEDEC TO-263-3 standard dimensions (8.39–9.65mm width, 9.66–10.66mm length), and the suggested pad layout in DS13015 Rev. 7-2 confirms compatibility with IPC-7351B Level B land patterns.
Does this device require snubber circuitry in 300kHz buck converters?
No snubber is required due to its 30ns trr and 10,000V/µs dv/dt rating-these specifications suppress voltage overshoot and ringing during fast switching transitions typical of modern synchronous buck topologies.
MBRB1540CT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tape & Reel (TR)
- 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:
- 700 mV @ 7.5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 30 ns
- Current - Reverse Leakage @ Vr:
- 100 µA @ 40 V
- Operating Temperature - Junction:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263AB (D2PAK)
MBRB1540CT-T FAQ
1.How can I place an order for MBRB1540CT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MBRB1540CT-T 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 MBRB1540CT-T reliable?
The price and inventory of MBRB1540CT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MBRB1540CT-T is usually 5 days.
3.What payment methods are accepted for MBRB1540CT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MBRB1540CT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MBRB1540CT-T?
MBRB1540CT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MBRB1540CT-T 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 MBRB1540CT-T?
For technical support, including MBRB1540CT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MBRB1540CT-T requirements.
6.How does Aetrix verify that MBRB1540CT-T is sourced from the original manufacturer or authorized distributors?
All MBRB1540CT-T 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 MBRB1540CT-T meets industry standards.
7.What is the process for return or replacement of MBRB1540CT-T?
All MBRB1540CT-T units undergo pre-shipment inspection (PSI). If there is an issue with MBRB1540CT-T, 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 MBRB1540CT-T part is unused and in its original packaging.
Return procedure for MBRB1540CT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MBRB1540CT-T Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
-
BAT54SLT1G
onsemi
-
BAV70LT1G
onsemi
-
BAT54CLT1G
onsemi
-
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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