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Diodes Incorporated MBRD1040CT-T
- Part No.:
- MBRD1040CT-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
MBRD1040CT-T.pdf
- Description:
- DIODE ARRAY SCHOTT 40V 5A TO252
- Quantity:
- Payment:
- Shipping:
Inventory:9,228
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Product details
Overview
MBRD1040CT-T from Diodes Incorporated is a 10A dual common-cathode Schottky barrier rectifier in DPAK (TO-252) package, rated for 40V peak repetitive reverse voltage and featuring typical forward voltage of 0.46V at 5A/25°C. It delivers low power loss and high efficiency for DC-DC output rectification, OR-ing diode applications, and polarity protection in 12V/24V industrial power supplies.
For engineers reviewing the MBRD1040CT-T datasheet, MBRD1040CT-T pinout, MBRD1040CT-T application, or MBRD1040CT-T equivalent, key selection criteria include its dual-element common-cathode configuration, 75A non-repetitive surge rating, thermal resistance of 2.43°C/W junction-to-case, and suitability for high-frequency switching topologies requiring minimal forward drop and fast recovery.
Technical Context
This dual Schottky rectifier integrates two independent anode terminals sharing one cathode terminal, enabling parallel current paths with matched thermal coupling. Its guard-ring die construction provides transient overvoltage protection without external TVS devices.
Designed for surface-mount operation on PCBs with ≥14 mm² copper pad area per element, it supports continuous 5A per element at 25°C ambient or 3.5A per element at 100°C ambient, with derating governed by Figure 4 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum reverse voltage before breakdown; defines safe blocking capability in 36V nominal systems |
| IO per element | 5 A - Continuous DC current per diode at TA = 25°C with adequate heatsinking |
| IFSM | 75 A - Surge withstand for 8.3 ms half-sine; enables robust startup/inrush handling |
| VFM @ 5A/25°C | 0.46 V - Low conduction loss reduces heat generation in high-current 12V output rails |
| RJC | 2.43 °C/W - Junction-to-case thermal resistance; requires direct thermal pad contact to PCB ground plane |
| Cj @ 4V | 500 pF - Junction capacitance impacts high-frequency switching noise and EMI filtering design |
Pinout & Package
DPAK (TO-252) package with exposed thermal pad on bottom side; pin 1 and pin 3 are anodes, pin 4 is common cathode (pin 2 not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode 1 | Input path for first rectifier element; connects to primary-side switch node or input rail |
| Pin 3 | Anode 2 | Input path for second rectifier element; enables dual-input OR-ing or interleaved outputs |
| Pin 4 | Common Cathode | Shared output node; must be routed to low-inductance power plane for thermal and EMI performance |
| Bottom Pad | Thermal / Electrical Cathode Extension | Electrically tied to cathode; mandatory solder connection to ≥14 mm² copper area for RJC spec compliance |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-cathode topology | Enables compact dual-rail rectification or redundant OR-ing without discrete cathode tie traces |
| Guard-ring die construction | Provides intrinsic transient voltage suppression up to rated VRRM without added TVS components |
| UL 94V-0 plastic package | Meets flammability safety requirements for enclosed industrial and automotive power modules |
| Low 0.46V forward drop @ 5A | Reduces conduction loss by >30% vs. standard silicon rectifiers, improving 12V converter efficiency |
Applications
| DC-DC Output Rectification | Power OR-ing |
|---|---|
Use Scenario: Secondary-side synchronous rectification replacement in isolated 12V/24V flyback or forward converters. IC Role / Device Role / Timing Role: Dual Schottky rectifier providing low-loss unidirectional current path from transformer secondary to output capacitor. Use Value: 0.46V forward drop at 5A cuts conduction loss by ~1.2W per element versus 1N5822, directly improving full-load efficiency. | Use Scenario: Redundant 24V input supply combining in telecom shelf power distribution units. IC Role / Device Role / Timing Role: Common-cathode dual diode enabling automatic source selection with minimal voltage drop between inputs. Use Value: Matched VFM across elements ensures balanced current sharing and eliminates need for external balancing resistors. |
| Polarity Protection | Low-Voltage Inverter Output Stage |
Use Scenario: Reverse-voltage safeguard on 12V battery-powered motor controllers and PLC I/O modules. IC Role / Device Role / Timing Role: Series-connected Schottky blocking diode preventing damage during incorrect battery installation. Use Value: 40V VRRM rating covers 12V system transients (e.g., load dump), while 0.53V VFM at 100°C maintains low insertion loss. | Use Scenario: Output stage freewheeling path in 24V brushless DC motor inverters operating at 20–100 kHz. IC Role / Device Role / Timing Role: Fast-recovery Schottky clamp absorbing inductive kickback during MOSFET turn-off. Use Value: 10,000 V/s dv/dt rating prevents false triggering under rapid bus voltage transitions in motor drive waveforms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STPS1045C | 45V VRRM, 10A total package rating (5A per element), TO-220AC package with isolated tab | Requires mechanical isolation and heatsink mounting; higher RJA than DPAK on PCB | Select when higher voltage margin or through-hole assembly is required |
| SS1040 | Single-element 10A Schottky, DO-214AB package, no common-cathode configuration | Cannot implement OR-ing or dual-rail rectification without external cathode tie and layout penalty | Select only for single-path rectification where space allows discrete placement |
Compared with STPS1045C and SS1040, MBRD1040CT-T uniquely combines dual common-cathode topology, DPAK thermal performance, and 40V rating optimized for compact 12–24V industrial power stages-enabling lower board area, simpler layout, and better thermal management than alternatives.
Availability
MBRD1040CT-T is available at Aetrix Electronics and suitable for industrial power supplies, telecom rectifier modules, and automotive body control units requiring stable component supply and long-term manufacturability.
Supply support for MBRD1040CT-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 US.
The MBRD1040CT-T belongs to Diodes' high-efficiency Schottky rectifier product line, engineered specifically for low-voltage, high-current DC-DC conversion and power redundancy applications where thermal performance and forward voltage minimization are critical.
FAQ
What is the maximum allowable junction temperature for MBRD1040CT-T?
The absolute maximum junction temperature is +125°C, as specified in the datasheet's "Operating Temperature Range" table. Sustained operation above this limit risks permanent degradation of the Schottky barrier and increased leakage current. Thermal design must ensure TJ remains ≤125°C under worst-case load and ambient conditions using the provided RJC value and measured case temperature.
Can MBRD1040CT-T be used in place of a single 10A Schottky like SS1040?
No - MBRD1040CT-T contains two 5A-rated Schottky elements sharing one cathode, not a single 10A device. Substituting it for a single-element 10A diode would require rewiring both anodes to the same input and verifying that each element carries ≤5A. Its dual structure is intentional for OR-ing or split-output topologies, not simple current doubling.
Is the bottom thermal pad electrically isolated?
No - the exposed bottom pad is electrically connected to the common cathode (Pin 4). It must be soldered to a PCB copper area designated as cathode potential. Using it as a floating thermal slug or connecting it to ground without verifying cathode grounding will cause short-circuit failure.
What is the recommended PCB pad layout for optimal thermal performance?
Diodes Inc. specifies a minimum 14 mm² copper pad area per element (document AP02001). For MBRD1040CT-T, use separate 7 mm² anode pads for Pins 1 and 3, and a ≥14 mm² cathode pad connected to Pin 4 and the bottom thermal pad. Avoid thermal reliefs on cathode connections and use ≥2 oz copper for improved heat spreading.
MBRD1040CT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- 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):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 480 mV @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 150 µA @ 35 V
- Operating Temperature - Junction:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-252 (DPAK)
MBRD1040CT-T FAQ
1.How can I place an order for MBRD1040CT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MBRD1040CT-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 MBRD1040CT-T reliable?
The price and inventory of MBRD1040CT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MBRD1040CT-T is usually 5 days.
3.What payment methods are accepted for MBRD1040CT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MBRD1040CT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MBRD1040CT-T?
MBRD1040CT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MBRD1040CT-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 MBRD1040CT-T?
For technical support, including MBRD1040CT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MBRD1040CT-T requirements.
6.How does Aetrix verify that MBRD1040CT-T is sourced from the original manufacturer or authorized distributors?
All MBRD1040CT-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 MBRD1040CT-T meets industry standards.
7.What is the process for return or replacement of MBRD1040CT-T?
All MBRD1040CT-T units undergo pre-shipment inspection (PSI). If there is an issue with MBRD1040CT-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 MBRD1040CT-T part is unused and in its original packaging.
Return procedure for MBRD1040CT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MBRD1040CT-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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