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Vishay General Semiconductor - Diodes Division VI40M120C-M3/4W
- Part No.:
- VI40M120C-M3/4W
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Diode Arrays
- Package:
- TO-262-3 Long Leads, I2PAK, TO-262AA
- Datasheet:
-
VI40M120C-M3/4W.pdf
- Description:
- DIODE ARR SCHOT 120V 20A TO262AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,676
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Product details
Overview
VI40M120C-M3/4W from Vishay General Semiconductor is a dual high-voltage trench MOS barrier Schottky rectifier in TO-262AA package, rated for 120 V reverse voltage and 2 × 20 A average forward current per diode, with ultra-low forward voltage (0.46 V at 5 A, 125 °C), used as freewheeling or OR-ing diodes in high-frequency DC/DC converters.
For engineers reviewing the VI40M120C-M3/4W datasheet, VI40M120C-M3/4W pinout, VI40M120C-M3/4W application, or VI40M120C-M3/4W equivalent, key selection criteria include thermal resistance (RθJA = 55 °C/W), peak surge current (250 A), common-cathode configuration, and halogen-free RoHS-compliant M3 construction.
Technical Context
This dual common-cathode Schottky rectifier uses trench MOS technology to achieve low VF and high dV/dt capability (10,000 V/μs), enabling fast switching in hard-switched topologies. Its 175 °C maximum junction temperature and low RθJC (1.8 °C/W per diode) support high-power-density designs without forced cooling.
The device is optimized for unidirectional conduction in high-efficiency power conversion stages, where low conduction loss and minimal reverse recovery charge are critical. It operates reliably under repetitive surge conditions (8.3 ms half-sine) and meets JESD 201 Class 1A whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 120 V - supports input rails up to 100 V DC with margin for transient spikes in industrial SMPS |
| IF(AV) per diode | 20 A - enables continuous 40 A total output in dual-channel configurations with shared cathode |
| VF @ 5 A, 125 °C | 0.46 V - reduces conduction loss to <0.23 W per diode at 5 A, improving system efficiency |
| IFSM | 250 A - withstands short-duration inrush and fault currents in 48 V telecom or server PSUs |
| RθJA | 55 °C/W - requires heatsinking for >12 A continuous operation in free-air TO-262AA mounting |
| TJ max | 175 °C - allows operation in high-ambient environments such as enclosed industrial enclosures |
| Polarity | Common cathode (Pin 1 & Pin 2 = anodes, Pin 3 = cathode) - simplifies parallel output rectification |
Pinout & Package
Package: TO-262AA - surface-mount compatible variant of TO-220 with isolated flange, 1.45 g unit weight, UL 94 V-0 molding compound, matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode 1 | Input terminal for first Schottky diode; electrically isolated from flange and Pin 3 |
| Pin 2 | Anode 2 | Input terminal for second Schottky diode; independent anode path, common cathode with Pin 1 |
| Pin 3 | Cathode (common) | Shared output node; connected to metal flange (electrically active); must be isolated from heatsink unless grounded |
Key Features
| Feature | Design Value |
|---|---|
| Trench MOS Schottky architecture | Eliminates minority-carrier storage, enabling zero reverse recovery charge (Qrr ≈ 0) and EMI reduction |
| Ultra-low VF at high temperature | 0.46 V @ 5 A, 125 °C - maintains efficiency in thermally stressed converter stages |
| Halogen-free, RoHS-compliant M3 grade | Meets JESD 201 Class 1A whisker resistance and IPC/JEDEC standard solderability (J-STD-002) |
| High dV/dt immunity | 10,000 V/μs - prevents false turn-on during fast voltage transients in synchronous rectifier circuits |
| Thermal robustness | RθJC = 1.8 °C/W per diode - enables direct thermal coupling to heatsink via flange for high-power dissipation |
Applications
| Server Power Supply Rectification | Industrial DC/DC Converter Freewheeling |
|---|---|
|
Use Scenario: Output rectification in 48 V–12 V intermediate bus converters delivering up to 800 W. IC Role / Device Role / Timing Role: Dual common-cathode Schottky rectifier replacing two discrete diodes to reduce PCB area and parasitic inductance. Use Value: 0.46 V forward drop at 125 °C lowers conduction loss by ~35 % vs. silicon diodes, improving full-load efficiency to >95 %. |
Use Scenario: Freewheeling path in 24 V input, 5 V/20 A isolated flyback or forward converters for PLC I/O modules. IC Role / Device Role / Timing Role: Low-Qrr freewheeling diode minimizing switching node ringing and EMI filter size. Use Value: Zero reverse recovery eliminates tail current, reducing snubber losses and enabling higher switching frequencies (up to 500 kHz). |
| Reverse Battery Protection | OR-ing Diode in Redundant Power Systems |
|
Use Scenario: Input protection for 24 V vehicle-mounted electronics against battery polarity reversal during jump-start events. IC Role / Device Role / Timing Role: Series-connected Schottky diode blocking reverse current while minimizing voltage drop across supply path. Use Value: 0.64 V VF @ 20 A limits power loss to 12.8 W at full load, avoiding thermal runaway without active cooling. |
Use Scenario: Diode-OR configuration in dual 48 V telecom rectifier systems ensuring uninterrupted power during module swap or failure. IC Role / Device Role / Timing Role: Common-cathode dual diode providing independent anode paths for two inputs, single output node. Use Value: Matched VF characteristics between diodes (<±5 mV) ensure balanced current sharing and prevent thermal imbalance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| V40M120C-M3/4W | TO-220AB package, RθJA = 45 °C/W, same electrical specs, heavier (1.88 g) | Better thermal performance in free-air; requires screw-mount heatsink | Select when board space permits larger footprint and higher thermal mass is beneficial |
| STPS40M120CG | Single-diode 40 A rating, TO-247AC package, VF = 0.72 V @ 20 A, 25 °C | Not dual-common-cathode; requires external parallel configuration for dual-path use | Choose only if redesign allows discrete dual placement and higher VF is acceptable |
Compared with V40M120C-M3/4W and STPS40M120CG, VI40M120C-M3/4W offers superior thermal resistance matching in surface-mount layouts and native dual-channel integration-reducing layout complexity and interconnect inrush stress without compromising surge rating or junction temperature margin.
Availability
VI40M120C-M3/4W is available at Aetrix Electronics and suitable for industrial DC/DC converters, telecom power supplies, and automotive-grade reverse-battery protection circuits requiring stable component supply and long-term manufacturing continuity.
Supply support for VI40M120C-M3/4W 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and optoelectronics for power, signal, and sensing applications.
The VI40M120C-M3/4W belongs to Vishay's TMBS® (Trench MOS Barrier Schottky) family, engineered specifically for high-efficiency, high-frequency power conversion where low forward voltage and zero reverse recovery are mandatory.
FAQ
What is the maximum junction temperature rating for VI40M120C-M3/4W?
The VI40M120C-M3/4W has a maximum junction temperature (TJ) of 175 °C, verified per Vishay Document Number 89465. This rating allows sustained operation in high-ambient environments such as enclosed industrial power supplies or automotive under-hood applications, provided thermal design maintains TJ ≤ 175 °C using the specified RθJA = 55 °C/W.
Is VI40M120C-M3/4W pin-compatible with V40M120C-M3/4W?
No - VI40M120C-M3/4W uses TO-262AA packaging with different lead spacing and flange isolation, while V40M120C-M3/4W uses TO-220AB. Though both share identical pin numbering (Pin 1/2 = anodes, Pin 3 = common cathode), mechanical fit and thermal mounting differ; PCB layout revision is required for substitution.
What does the "M3" suffix indicate in VI40M120C-M3/4W?
The "M3" suffix denotes Vishay's halogen-free, RoHS-compliant commercial-grade construction, including matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and passing JESD 201 Class 1A whisker testing. It confirms environmental compliance and solderability assurance for automated assembly processes.
Can VI40M120C-M3/4W be used in reverse battery protection circuits?
Yes - VI40M120C-M3/4W is explicitly recommended for reverse battery protection per its datasheet Typical Applications section. Its 120 V VRRM, low VF (0.64 V @ 20 A), and 250 A IFSM enable robust blocking of reverse-polarity transients while minimizing forward conduction loss in 24 V or 48 V systems.
What is the thermal resistance from junction to ambient (RθJA) for VI40M120C-M3/4W?
The VI40M120C-M3/4W has a typical RθJA of 55 °C/W when mounted on a standard FR-4 PCB with 1 in² copper pad (per datasheet Figure 1 derating curve). This value assumes no external heatsink; adding a 10 cm² aluminum heatsink can reduce RθJA to ~25 °C/W, enabling higher continuous current capability.
VI40M120C-M3/4W Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- TMBS®
- Package/Case:
- TO-262-3 Long Leads, I2PAK, TO-262AA
- Packaging:
- Tube
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 120 V
- Current - Average Rectified (Io) (per Diode):
- 20A
- Voltage - Forward (Vf) (Max) @ If:
- 890 mV @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 120 V
- Operating Temperature - Junction:
- -40°C ~ 175°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-262AA
VI40M120C-M3/4W FAQ
1.How can I place an order for VI40M120C-M3/4W through Aetrix?
Please submit a Request for Quotation (RFQ) for VI40M120C-M3/4W 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 VI40M120C-M3/4W reliable?
The price and inventory of VI40M120C-M3/4W are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VI40M120C-M3/4W is usually 5 days.
3.What payment methods are accepted for VI40M120C-M3/4W?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VI40M120C-M3/4W transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VI40M120C-M3/4W?
VI40M120C-M3/4W orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VI40M120C-M3/4W 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 VI40M120C-M3/4W?
For technical support, including VI40M120C-M3/4W datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VI40M120C-M3/4W requirements.
6.How does Aetrix verify that VI40M120C-M3/4W is sourced from the original manufacturer or authorized distributors?
All VI40M120C-M3/4W 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 VI40M120C-M3/4W meets industry standards.
7.What is the process for return or replacement of VI40M120C-M3/4W?
All VI40M120C-M3/4W units undergo pre-shipment inspection (PSI). If there is an issue with VI40M120C-M3/4W, 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 VI40M120C-M3/4W part is unused and in its original packaging.
Return procedure for VI40M120C-M3/4W:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VI40M120C-M3/4W Tags
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BAV99-7-F
Diodes Incorporated
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BAT54C-7-F
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Diodes Incorporated
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Nexperia USA Inc.
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MMBD1503-TP
Micro Commercial Co
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