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Diodes Incorporated MBR1040
- Part No.:
- MBR1040
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- TO-220-2
- Datasheet:
-
MBR1040.pdf
- Description:
- DIODE SCHOTTKY 40V 10A TO220AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,203
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Product details
Overview
MBR1040 from Diodes Incorporated is a 10A, 45V Schottky barrier rectifier in TO-220AC package, designed for low-voltage, high-frequency DC/DC conversion, freewheeling, and polarity protection. It delivers 0.95V forward voltage at 10A/25°C, 150A non-repetitive surge capability, and 400pF junction capacitance, enabling efficient operation in SMPS and automotive auxiliary power supplies.
For engineers reviewing the MBR1040 datasheet, MBR1040 pinout, MBR1040 application, or MBR1040 equivalent, key selection criteria include its 45V reverse blocking rating, thermal resistance of 2.5°C/W (junction-to-case), low forward voltage drop under full load, and compatibility with standard TO-220 heatsinking layouts.
Technical Context
This Schottky rectifier uses guard ring die construction to enhance transient immunity and suppress avalanche-induced failure during inductive switching. Its low forward voltage minimizes conduction loss in high-current paths, while its 400pF capacitance supports fast switching in 100kHz–500kHz converters without excessive ringing.
The device operates across –65°C to +150°C and exhibits only 0.1mA peak reverse leakage at rated 45V DC blocking voltage and 25°C case temperature-critical for maintaining efficiency in thermally constrained industrial power modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Reverse Voltage | 45 V - defines maximum allowable DC or repetitive AC reverse bias before breakdown |
| Forward Voltage @10A/25°C | 0.95 V - directly determines conduction loss (9.5W at 10A) in continuous output paths |
| Average Forward Current | 10 A @ TC = +125°C - specifies sustained current-handling capacity with proper heatsinking |
| Surge Current (8.3ms) | 150 A - enables robust handling of inrush and flyback energy spikes in motor drives |
| Junction-to-Case Thermal Resistance | 2.5 °C/W - quantifies thermal path efficiency from die to heatsink mounting surface |
| Reverse Leakage @45V/25°C | 0.1 mA - ensures minimal standby power loss in battery-backed or always-on systems |
| Total Capacitance @4V/1MHz | 400 pF - impacts high-frequency switching noise and EMI filter design in SMPS outputs |
Pinout & Package
Package: TO-220AC - molded plastic case with UL 94V-0 flammability rating, tin-plated terminals, and 2.24g mass. Mounting tab is cathode-connected and electrically active.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Input current entry point | Connected to source-side of rectification path; must withstand full surge current |
| Cathode (Lead 2) | Output current exit point | Internally bonded to metal tab; serves as primary thermal and electrical return path |
| Cathode (Lead 3) | Redundant cathode connection | Provides parallel current path and mechanical stability; shares tab potential |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Improves ruggedness against voltage transients and localized edge breakdown during fast dv/dt events |
| Low forward voltage drop | Reduces power dissipation by ~30% vs. comparable silicon rectifiers at 10A, lowering heatsink requirements |
| High surge current rating | Withstands 150A half-sine surges-sufficient for 12V automotive load dump and motor commutation spikes |
| RoHS-compliant lead finish | Tin-plated terminals ensure reliable solder wetting and compatibility with Pb-free reflow profiles |
Applications
| DC/DC Converter Output Rectification | Automotive Auxiliary Power Supply |
|---|---|
Use Scenario: Secondary-side rectification in 12V–48V isolated flyback or forward converters powering infotainment systems. IC Role / Device Role / Timing Role: Unidirectional current steering element converting transformer AC output to regulated DC bus. Use Value: 0.95V VF limits conduction loss to ≤9.5W at 10A, reducing thermal stress on PCB copper and adjacent components. | Use Scenario: Polarity protection and reverse-battery safeguard in vehicle body control modules (BCMs). IC Role / Device Role / Timing Role: Series-connected blocking diode preventing damage from accidental negative battery connection. Use Value: 45V VRRM exceeds automotive load-dump transients (ISO 7637-2 Pulse 5a: +120V/100ms), ensuring survival without clamping circuitry. |
| Freewheeling Diode in Motor Drivers | Industrial SMPS Input Stage |
Use Scenario: Flyback path for brushed DC motor current during PWM off-time in HVAC blower circuits. IC Role / Device Role / Timing Role: Provides low-loss recirculation path for inductive kickback energy. Use Value: 150A IFSM accommodates peak motor stall currents without degradation, extending system reliability. | Use Scenario: Output rectification in 24V/10A industrial switch-mode power supplies for PLC I/O modules. IC Role / Device Role / Timing Role: High-current DC output stage component delivering stable bus voltage under dynamic loads. Use Value: 2.5°C/W RθJC enables direct mounting to aluminum chassis, eliminating discrete heatsinks in space-constrained enclosures. |
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-MBR1045 | Identical 45V VRRM, 0.92V VF @10A/25°C, same TO-220AC package | No functional deviation; validated in identical automotive and industrial rectifier roles | Drop-in replacement with identical thermal and electrical behavior |
| ON Semiconductor M1045 | 45V VRRM, 0.98V VF @10A/25°C, 2.7°C/W RθJC, same pinout | Slightly higher conduction loss and thermal resistance; requires marginally larger heatsink area | Acceptable where 0.03V VF increase and +0.2°C/W thermal penalty are tolerable |
Compared with MBR1040, VS-MBR1045 offers marginally lower forward voltage for reduced conduction loss, while M1045 trades 0.03V higher VF and +0.2°C/W thermal resistance for broader second-source availability in high-volume manufacturing.
Availability
MBR1040 is available at Aetrix Electronics and suitable for DC/DC converter output rectification, automotive auxiliary power supply, and freewheeling diode applications requiring stable component supply and long-term industrial sourcing continuity.
Supply support for MBR1040 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, specializing in high-efficiency power management and signal integrity solutions for industrial, computing, and automotive markets.
The MBR10xx series belongs to Diodes' high-current Schottky rectifier product line, engineered specifically for low-loss, high-reliability rectification in 10A-class power conversion stages operating up to 500kHz.
FAQ
Is MBR1040 still in active production?
No-MBR1040 is officially discontinued per Diodes Incorporated's DS23009 Rev. 11 (June 2015). However, Aetrix Electronics maintains legacy inventory with full traceability and offers engineering support for obsolescence mitigation, including cross-reference validation and alternative qualification.
Can MBR1040 be mounted directly to a heatsink without insulation?
Yes-the TO-220AC package features an electrically active cathode tab. When mounted to a heatsink, the cathode becomes part of the thermal and electrical ground path. Insulating hardware is required only if the heatsink is not referenced to cathode potential.
What is the maximum operating temperature for continuous 10A current?
MBR1040 sustains 10A average forward current only when case temperature (TC) is maintained at or below +125°C. Derating begins above this point; at +150°C case temperature, maximum continuous current drops to approximately 7.5A per Figure 1 in the datasheet.
Does MBR1040 require snubber circuitry in high-frequency applications?
Not typically-its 400pF junction capacitance and low stored charge minimize switching losses and voltage overshoot. Snubbers may be needed only in ultra-fast (<50ns) hard-switched topologies with high stray inductance, where parasitic ringing exceeds EMI limits.
MBR1040 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-220-2
- Packaging:
- Tube
- Product Status:
- Obsolete
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 10A
- Voltage - Forward (Vf) (Max) @ If:
- 840 mV @ 10 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 40 V
- Capacitance @ Vr, F:
- 400pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AC
- Operating Temperature - Junction:
- -65°C ~ 150°C
MBR1040 FAQ
1.How can I place an order for MBR1040 through Aetrix?
Please submit a Request for Quotation (RFQ) for MBR1040 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 MBR1040 reliable?
The price and inventory of MBR1040 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MBR1040 is usually 5 days.
3.What payment methods are accepted for MBR1040?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MBR1040 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MBR1040?
MBR1040 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MBR1040 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 MBR1040?
For technical support, including MBR1040 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MBR1040 requirements.
6.How does Aetrix verify that MBR1040 is sourced from the original manufacturer or authorized distributors?
All MBR1040 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 MBR1040 meets industry standards.
7.What is the process for return or replacement of MBR1040?
All MBR1040 units undergo pre-shipment inspection (PSI). If there is an issue with MBR1040, 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 MBR1040 part is unused and in its original packaging.
Return procedure for MBR1040:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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