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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

onsemi MBR750

Name: MBR750
Brand: onsemi
SKU: MBR750
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MBR750

Manufacturer:: onsemi

Category:: Single Diodes

Package:: TO-220-2

Datasheet:: MBR750.pdf

Description:: DIODE SCHOTTKY 50V 7.5A TO220-2L

Quantity:: RFQ Add To RFQ list

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Inventory:2,690

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Product details

Overview

MBR750 from Diodes Incorporated is a 7.5A, 50V Schottky barrier rectifier in TO220AC package, designed for low-voltage, high-frequency inverters, freewheeling, and polarity protection circuits. It delivers low forward voltage drop (0.75V @ 7.5A, 125°C), high surge capability (150A non-repetitive), and thermal resistance of 3.5°C/W junction-to-case when mounted on a heatsink.

For engineers reviewing the MBR750 datasheet, MBR750 pinout, MBR750 application, or MBR750 equivalent, key selection criteria include its 50V reverse blocking rating, 7.5A average output current at 125°C case temperature, low V_F performance across temperature, and TO220AC mechanical compatibility with standard heatsink mounting.

Technical Context

This discrete Schottky diode uses guard ring die construction to enhance transient protection and reliability under repetitive surge stress. Its low forward voltage minimizes conduction losses in DC-DC converters and switching power supplies operating below 50V.

The device exhibits 400pF typical junction capacitance at 1MHz/4V reverse bias and supports dV/dt up to 10,000 V/µs - enabling stable operation in fast-switching topologies such as synchronous rectification and flyback snubber networks.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	50 V - Maximum peak repetitive reverse voltage; defines safe DC blocking limit in polarity protection and freewheeling paths.
I_O	7.5 A @ T_C = +125°C - Continuous average forward current rating; requires heatsink for full-load operation at elevated ambient.
V_F	0.75 V @ I_F = 7.5A, T_J = +125°C - Low conduction loss enables >92% efficiency in 12V–48V output rectification stages.
I_FSM	150 A (8.3ms half-sine) - Withstands inrush and short-circuit surges in motor drives and UPS systems without failure.
R_θJC	3.5 °C/W - Thermal resistance from junction to case; determines minimum heatsink size needed to maintain T_J ≤ 150°C.
C_T	400 pF @ 1MHz, 4V - Low junction capacitance reduces switching noise and EMI in high-frequency (>100kHz) converter designs.

Pinout & Package

Package: TO220AC - Molded plastic case with UL 94V-0 flammability rating, tin-plated terminals solderable per MIL-STD-202 Method 208, and 2.3g mass. Mounting via center tab (cathode) to heatsink required for thermal management.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Forward current entry point	Connected to input/source side in rectifier configuration; must be isolated from heatsink.
Cathode (Pin 2 & 3, tied internally)	Forward current exit / heat path	Electrically and thermally connected to metal tab; serves as primary heatsink interface and output node.

Key Features

Feature	Design Value
Guard ring die construction	Improves ruggedness against voltage transients and prevents edge breakdown during repetitive surge events.
Low forward voltage drop	0.75V at 7.5A/125°C reduces power dissipation by ~35% vs. comparable silicon rectifiers, lowering thermal design burden.
High surge current rating	150A non-repetitive peak enables reliable operation in motor drive freewheeling and battery-charger inrush conditions.
RoHS-compliant lead-free finish	Tin-plated terminals meet EU Directive 2011/65/EU and support automated reflow soldering without lead contamination risk.

Applications

DC-DC Converter Output Rectification

Automotive Battery Polarity Protection

Use Scenario: Secondary-side rectification in isolated 12V/24V/48V DC-DC modules for telecom and industrial power supplies.

IC Role / Device Role / Timing Role: Schottky rectifier replacing conventional PN diodes to minimize conduction loss and improve efficiency above 90%.

Use Value: 0.75V V_F at full load cuts rectifier power loss by ~2.2W vs. 1.1V silicon diode, reducing heatsink requirements.

Use Scenario: Reverse-polarity protection circuit at vehicle battery input of infotainment head units and ADAS ECUs.

IC Role / Device Role / Timing Role: Series-connected anode-to-battery+ cathode-to-load configuration blocks reverse current during accidental battery reversal.

Use Value: 50V V_RRM safely withstands load-dump transients up to 40V while maintaining low insertion loss (<0.1V at 5A).

UPS Inverter Freewheeling Diode

Solar Microinverter DC Link Clamp

Use Scenario: Freewheeling path for IGBTs/MOSFETs in line-interactive UPS inverters handling 7.5A inductive loads.

IC Role / Device Role / Timing Role: Provides low-loss current recirculation path during switch-off transitions to suppress voltage spikes.

Use Value: 150A I_FSM handles motor-start surges; 400pF C_T limits capacitive turn-on loss and EMI generation.

Use Scenario: Clamping diode across DC link capacitors in single-phase solar microinverters with 50V-rated PV strings.

IC Role / Device Role / Timing Role: Absorbs inductive energy from transformer leakage and suppresses voltage overshoot during MOSFET commutation.

Use Value: Guard ring structure ensures stable reverse recovery under repeated 10,000 V/µs dV/dt stress common in high-frequency transformer-driven topologies.

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-75SQ045	45V V_RRM, 75A I_FSM, TO220AC, 0.52V V_F @ 7.5A/25°C	Limited to ≤45V systems; lower V_F improves light-load efficiency but reduced blocking margin.	Select when system max reverse voltage ≤45V and lowest possible conduction loss at room temperature is critical.
ON Semiconductor MUR750	50V V_RRM, 125A I_FSM, TO220AC, 0.92V V_F @ 7.5A/125°C (Ultrafast recovery)	Higher V_F increases conduction loss; ultrafast recovery adds complexity for pure Schottky use cases.	Prefer only if reverse recovery time <50ns is required alongside 50V blocking - otherwise MBR750 offers superior thermal efficiency.

Compared with VS-75SQ045 and MUR750, the MBR750 uniquely balances 50V blocking, 7.5A thermal current capability, and 0.75V V_F at operating temperature - making it optimal for cost-sensitive, thermally constrained 48V industrial and automotive rectification where exact 50V margin is required.

Availability

MBR750 is available at Aetrix Electronics and suitable for DC-DC converter output rectification, automotive battery polarity protection, UPS inverter freewheeling, and solar microinverter DC link clamp applications requiring stable component supply despite its obsolete status.

Supply support for MBR750 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, manufacturing, and sales operations across Asia, Europe, and North America.

The MBR7xx series belongs to Diodes' high-current Schottky rectifier product line, engineered specifically for efficiency-critical, medium-power switching power conversion and protection circuits in industrial, computing, and automotive environments.

FAQ

Is MBR750 still in active production?

No - Diodes Incorporated officially discontinued the MBR750, as confirmed in DS23007 Rev. 11-4 (July 2015). It is marked "OBSOLETE – PART DISCONTINUED" in all official documentation. However, Aetrix Electronics maintains legacy inventory with full traceability and supports long-term design continuity through controlled allocation and cross-reference guidance.

What is the correct pin configuration for TO220AC mounting?

The TO220AC package has three leads: Pin 1 (anode), Pin 2 (cathode), and Pin 3 (cathode, internally tied to Pin 2 and the metal tab). The tab is electrically connected to the cathode and must be insulated from chassis ground unless the cathode reference is at system ground - proper insulating hardware and thermal paste are required for heatsink mounting.

Can MBR750 replace MBR740 or MBR730 in existing designs?

Yes - MBR750 is a direct upgrade within the same TO220AC package and pinout, offering higher reverse voltage (50V vs. 40V/30V) and identical thermal and surge ratings. No layout or thermal redesign is needed, though system-level validation of reverse voltage margin and transient immunity is recommended after substitution.

Why does MBR750 specify both V_F at 25°C and 125°C?

Schottky diode forward voltage decreases with rising junction temperature. Specifying V_F at both temperatures enables accurate power loss calculation across operating range: 0.84V at 25°C drops to 0.75V at 125°C, confirming stable conduction behavior and supporting thermal design at worst-case hot conditions.

MBR750 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-220-2

Packaging:: Tube

Product Status:: Active

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 50 V

Current - Average Rectified (Io):: 7.5A

Voltage - Forward (Vf) (Max) @ If:: 750 mV @ 7.5 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 500 µA @ 50 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220-2L

Operating Temperature - Junction:: -65°C ~ 150°C

MBR750 FAQ

1.How can I place an order for MBR750 through Aetrix?

Please submit a Request for Quotation (RFQ) for MBR750 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 MBR750 reliable?

The price and inventory of MBR750 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MBR750 is usually 5 days.

3.What payment methods are accepted for MBR750?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MBR750 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MBR750?

MBR750 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MBR750 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 MBR750?

For technical support, including MBR750 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MBR750 requirements.

6.How does Aetrix verify that MBR750 is sourced from the original manufacturer or authorized distributors?

All MBR750 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 MBR750 meets industry standards.

7.What is the process for return or replacement of MBR750?

All MBR750 units undergo pre-shipment inspection (PSI). If there is an issue with MBR750, 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 MBR750 part is unused and in its original packaging.

Return procedure for MBR750:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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