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onsemi MBR735
- Part No.:
- MBR735
- Manufacturer:
- onsemi
- Category:
- Single Diodes
- Package:
- TO-220-2
- Datasheet:
-
MBR735.pdf
- Description:
- DIODE SCHOTTKY 35V 7.5A TO220-2
- Quantity:
- Payment:
- Shipping:
Inventory:9,956
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Product details
Overview
MBR735 from Diodes Incorporated is a 35 V, 7.5 A Schottky barrier rectifier in TO220AC package, featuring low forward voltage drop (0.72 V @ 7.5 A, 25°C), high surge capability (150 A), and guard ring die construction for transient protection-used in low-voltage DC-DC output stages, solar charge controllers, and polarity protection circuits.
For engineers reviewing the MBR735 datasheet, MBR735 pinout, MBR735 application, or MBR735 equivalent, key selection criteria include peak reverse voltage (35 V), thermal resistance (3.5 °C/W), junction temperature range (–55 to +150°C), and RoHS-compliant tin-plated terminals suitable for industrial power conversion designs.
Technical Context
This Schottky rectifier uses planar epitaxial construction with integrated guard ring to suppress edge breakdown and improve transient immunity. Its low forward voltage minimizes conduction loss in high-current, low-voltage outputs (e.g., 5 V/12 V rails), while its 400 pF typical junction capacitance supports operation up to several MHz in switching regulator freewheeling paths.
The device operates across –55°C to +150°C junction temperature, with thermal resistance of 3.5 °C/W (junction-to-case) when mounted on a heatsink-enabling stable 7.5 A average current delivery at TC = +125°C per derating curve. dV/dt rating of 10,000 V/µs ensures robustness against fast-rising transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 35 V - Maximum repetitive reverse voltage; defines safe blocking capability in 24 V system inputs or 3.3–5 V buck converter outputs. |
| IO @ TC=125°C | 7.5 A - Continuous average forward current at case temperature 125°C; requires heatsinking for full-load operation. |
| VFM @ 7.5A, 25°C | 0.72 V - Forward voltage drop; yields ~5.4 W conduction loss at full current, critical for thermal design. |
| IFSM (8.3 ms) | 150 A - Non-repetitive surge rating; withstands inrush currents in battery-connected systems or motor drives. |
| RθJC | 3.5 °C/W - Junction-to-case thermal resistance; determines minimum heatsink size needed to maintain TJ ≤ 150°C. |
| IRM @ 125°C | 15 mA - Peak reverse leakage at elevated temperature; impacts standby power loss in always-on circuits. |
| CT @ 1 MHz | 400 pF - Junction capacitance; limits high-frequency switching noise and affects EMI filter design. |
Pinout & Package
Package: TO220AC - Molded plastic case (UL 94V-0), 2.3 g weight, tin-plated terminals solderable per MIL-STD-202 Method 208. Mounting tab is cathode-connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Forward current entry point | Connected to input/source side; must be routed with low-inductance path for high di/dt applications. |
| 2 (Tab/Cathode) | Common cathode terminal | Electrically connected to pin 2 and metal tab; serves as primary heat path and circuit return node. |
| 3 (Cathode) | Forward current exit point | Parallel connection to tab; used for PCB trace routing where tab mounting is not feasible. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Suppresses edge breakdown under transient overvoltage, improving reliability in unregulated input stages. |
| Low forward voltage (0.72 V) | Reduces power dissipation by >30% vs. comparable Si PN rectifiers, lowering heatsink requirements. |
| High surge rating (150 A) | Supports repeated cold-start events in automotive accessory modules without degradation. |
| RoHS-compliant tin finish | Enables lead-free reflow assembly and meets EU Directive 2011/65/EU without exemptions. |
Applications
| Solar Charge Controller Output Stage | 12 V Automotive Accessory Power Supply |
|---|---|
Use Scenario: Blocking reverse current from battery to PV panel at night while handling 7.5 A charging current during daylight. IC Role / Device Role / Timing Role: Unidirectional power flow control via Schottky rectification; no timing function. Use Value: 0.72 V forward drop minimizes voltage loss between panel and battery, preserving usable energy harvest. | Use Scenario: Polarity protection in cigarette lighter adapters or USB-C power delivery modules. IC Role / Device Role / Timing Role: Reverse polarity safeguard; conducts only when input is correctly oriented. Use Value: Guard ring structure prevents latch-up during load dump transients (ISO 7637-2 Pulse 5a). |
| DC-DC Converter Freewheeling Diode | Industrial 24 V AC/DC Power Supply Output |
Use Scenario: Freewheeling path in synchronous-buck converter secondary side operating at 200–500 kHz. IC Role / Device Role / Timing Role: Energy recirculation path during low-side switch off-time; zero-voltage switching support. Use Value: 400 pF junction capacitance limits displacement current, reducing EMI in compact 2-layer PCB layouts. | Use Scenario: Output rectification in 24 V, 7.5 A linear or quasi-resonant AC/DC supply for PLC I/O modules. IC Role / Device Role / Timing Role: Main output rectifier; handles continuous conduction mode with minimal ripple. Use Value: 3.5 °C/W RθJC enables direct mounting to chassis ground plane, eliminating discrete heatsink. |
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-75SQ030 | 30 V VRRM, same IO and TO220AC package; slightly lower VFM (0.69 V @ 7.5 A) | Lower max blocking voltage restricts use to ≤24 V systems | Select when system reverse voltage stays below 24 V and lowest conduction loss is prioritized. |
| ON Semiconductor MBR735CT | Dual common-cathode configuration (two 35 V/3.75 A dies); higher thermal mass but split current path | Requires parallel layout for single-diode replacement; better thermal spreading in dual-rail supplies | Choose for redundancy-critical 12 V dual-output supplies or where board space allows dual-trace routing. |
Compared with VS-75SQ030 and MBR735CT, the MBR735 offers balanced 35 V blocking margin and single-die simplicity-ideal for cost-sensitive 24–32 V industrial power rails where layout density and thermal interface consistency are critical.
Availability
MBR735 is available at Aetrix Electronics and suitable for solar charge controllers, automotive accessory power supplies, DC-DC converter freewheeling paths, and industrial 24 V AC/DC outputs requiring stable component supply despite its obsolete status.
Supply support for MBR735 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 MBR7xx series belongs to Diodes' high-current Schottky rectifier product line, engineered specifically for efficiency-critical, medium-power DC power conversion in industrial, computing, and automotive applications.
FAQ
Is MBR735 still in active production?
No-MBR735 is officially obsolete per Diodes Incorporated's DS23007 Rev. 11 (July 2015). However, Aetrix Electronics maintains legacy inventory with full traceability and provides documented lot history for ongoing production continuity.
Can MBR735 replace MBR740 in a 40 V design?
No-MBR735 has 35 V VRRM versus MBR740's 40 V rating. Substituting it in a 40 V system risks reverse breakdown during transients or line surges; derating rules require ≥20% margin, making MBR740 the minimum valid choice.
What is the maximum allowable case temperature for continuous 7.5 A operation?
The datasheet specifies 7.5 A average forward current is rated at TC = +125°C. Operation above this temperature requires current derating per Figure 1; at TC = +135°C, maximum IO drops to approximately 6.8 A to maintain TJ ≤ +150°C.
Does the TO220AC package have an electrically isolated tab?
No-the TO220AC package used in MBR735 has a conductive metal tab directly connected to the cathode (pin 2). Electrical isolation requires insulating hardware (e.g., shoulder washers, mica pads) when mounting to grounded heatsinks.
MBR735 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- SWITCHMODE™
- Package/Case:
- TO-220-2
- Packaging:
- Tube
- Product Status:
- Obsolete
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 35 V
- Current - Average Rectified (Io):
- 7.5A
- 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 @ 35 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-2
- Operating Temperature - Junction:
- -65°C ~ 175°C
MBR735 FAQ
1.How can I place an order for MBR735 through Aetrix?
Please submit a Request for Quotation (RFQ) for MBR735 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 MBR735 reliable?
The price and inventory of MBR735 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MBR735 is usually 5 days.
3.What payment methods are accepted for MBR735?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MBR735 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MBR735?
MBR735 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MBR735 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 MBR735?
For technical support, including MBR735 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MBR735 requirements.
6.How does Aetrix verify that MBR735 is sourced from the original manufacturer or authorized distributors?
All MBR735 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 MBR735 meets industry standards.
7.What is the process for return or replacement of MBR735?
All MBR735 units undergo pre-shipment inspection (PSI). If there is an issue with MBR735, 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 MBR735 part is unused and in its original packaging.
Return procedure for MBR735:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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