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Vishay General Semiconductor - Diodes Division VF40M120C-M3/4W
- Part No.:
- VF40M120C-M3/4W
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Diode Arrays
- Package:
- TO-220-3 Full Pack, Isolated Tab
- Datasheet:
-
VF40M120C-M3/4W.pdf
- Description:
- DIODE ARR SCHOTTKY 120V ITO220AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
VF40M120C-M3/4W from Vishay General Semiconductor is a dual high-voltage trench MOS barrier Schottky rectifier in ITO-220AB package, configured as common cathode with 120 V reverse voltage rating, 40 A average forward current (2 × 20 A), and ultra-low 0.46 V forward voltage at 5 A and 125 °C - used in high-frequency DC/DC converters and reverse battery protection circuits.
For engineers reviewing the VF40M120C-M3/4W datasheet, VF40M120C-M3/4W pinout, VF40M120C-M3/4W application, or VF40M120C-M3/4W equivalent, key selection criteria include its dual common-cathode topology, 250 A surge rating, 4.0 °C/W thermal resistance per diode, and JESD 201 Class 1A whisker-tested matte tin leads.
Technical Context
This device integrates two independent Schottky diodes in a single ITO-220AB thermally optimized package with isolated heatsink mounting capability (1500 V AC isolation). Its trench MOS architecture enables low dV/dt sensitivity (10,000 V/μs) and stable operation up to 150 °C junction temperature.
The common-cathode configuration supports parallel output paths with shared cathode connection, reducing PCB routing complexity in OR-ing and freewheeling applications. Each diode exhibits <500 μA reverse leakage at 120 V and 25 °C, and maintains sub-0.72 V VF at 20 A and 125 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 120 V - supports input stages in 48 V and 60 V industrial power systems without derating |
| IF(AV) | 40 A total (2 × 20 A) - enables dual-path 20 A load sharing or redundant 40 A single-output design |
| VF @ 5 A, 125 °C | 0.46 V - reduces conduction loss by >35% vs. standard Schottkys in high-temp environments |
| IFSM | 250 A - withstands inrush and fault currents in switched-mode supplies with minimal risk of bond-wire failure |
| RθJC | 4.0 °C/W per diode - allows direct heatsink mounting for thermal management without thermal interface material degradation |
| dV/dt | 10,000 V/μs - ensures immunity to fast transient switching noise in high-speed synchronous rectification |
| VAC Isolation | 1500 V - meets reinforced insulation requirements for secondary-side mounting on grounded heatsinks |
Pinout & Package
Package: ITO-220AB - thermally enhanced molded case with UL 94 V-0 rating, 10 in-lb max mounting torque, and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PIN 1 | Anode 1 | Independent anode terminal for first Schottky diode; routed separately for asymmetric load balancing |
| PIN 2 | Cathode (Common) | Shared cathode node for both diodes; electrically and thermally central point for low-inductance output return |
| PIN 3 | Anode 2 | Independent anode terminal for second Schottky diode; enables dual-input OR-ing or interleaved freewheeling |
Key Features
| Feature | Design Value |
|---|---|
| Trench MOS Schottky technology | Enables 0.46 V VF at 5 A/125 °C - cuts conduction loss by ~40% versus planar Schottky equivalents |
| Common-cathode dual-diode configuration | Reduces component count and layout area vs. two discrete SMD Schottkys in OR-ing or synchronous rectifier designs |
| JESD 201 Class 1A whisker testing | Guarantees long-term solder joint reliability under thermal cycling in automotive and industrial under-hood applications |
| 1500 V AC isolation (1 min) | Permits direct mounting to grounded metal heatsinks without additional insulating hardware or creepage barriers |
| Halogen-free, RoHS-compliant M3 suffix | Meets IPC-1752A material declaration requirements for green manufacturing and end-of-life recycling compliance |
Applications
| OR-ing Diode in Dual-Input Power Systems | Reverse Battery Protection |
|---|---|
Use Scenario: Two independent 48 V inputs feeding a common load with automatic source selection and fault isolation. IC Role / Device Role / Timing Role: Dual-anode/common-cathode Schottky rectifier providing low-loss, bidirectionally blocked path control without external controllers. Use Value: 0.46 V VF at 125 °C minimizes voltage drop across each path, preserving >98.5% efficiency at full 20 A per rail. | Use Scenario: Automotive infotainment module powered from vehicle battery with polarity reversal risk during jump-start or service. IC Role / Device Role / Timing Role: High-current, low-VF series blocking element placed between battery and system input. Use Value: 250 A IFSM withstands jump-start surges; 120 V VRRM covers 24 V system transients plus safety margin. |
| High-Frequency DC/DC Converter Freewheeling | Switching Power Supply Output Rectification |
Use Scenario: 300 kHz–1 MHz isolated flyback or forward converter with synchronous rectification disabled or impractical. IC Role / Device Role / Timing Role: Low-Qrr, low-VF freewheeling diode conducting during MOSFET off-time in secondary-side energy recovery. Use Value: Sub-0.72 V VF at 20 A/125 °C reduces heat generation by >30% vs. standard 120 V Schottkys, enabling smaller heatsinks. | Use Scenario: 12 V/30 A output stage of telecom-grade AC/DC front-end with tight thermal constraints. IC Role / Device Role / Timing Role: Dual-diode common-cathode rectifier delivering full-wave output with shared thermal path to heatsink. Use Value: 4.0 °C/W RθJC per diode allows 40 A total output with ≤60 °C case rise above ambient - avoids forced-air cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-voltage Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VF40M120C-M3/4W | Reference part: 120 V, 40 A total, ITO-220AB, common cathode, 0.46 V VF @ 5 A/125 °C | Designed for high-reliability industrial and automotive secondary-side rectification | Select for highest thermal efficiency at elevated temperatures and proven whisker resistance |
| STPS40H12CG | 120 V, 40 A total, TO-247AC package, common cathode, 0.72 V VF @ 20 A/125 °C | Higher VF increases conduction loss; TO-247AC requires larger PCB footprint and different mounting hardware | Consider when existing TO-247 heatsink infrastructure exists and 0.26 V higher VF is acceptable |
| SS8P12L | 120 V, 8 A per diode (16 A total), D2PAK package, common cathode, 0.69 V VF @ 8 A/125 °C | Lower current rating and SMT-only format limit use to lower-power, space-constrained designs | Use only in compact 12–24 V systems where 16 A total output suffices and reflow assembly is mandatory |
Compared with STPS40H12CG and SS8P12L, VF40M120C-M3/4W delivers the lowest forward voltage at high temperature and highest surge robustness in a through-hole package optimized for thermal transfer - making it preferred for 40 A industrial power rails where efficiency and reliability outweigh footprint constraints.
Availability
VF40M120C-M3/4W is available at Aetrix Electronics and suitable for high-frequency DC/DC converters, reverse battery protection circuits, and switching power supply output rectification requiring stable component supply, traceable sourcing, and long-term lifecycle support.
Supply support for VF40M120C-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 diodes, rectifiers, MOSFETs, and optoelectronics with emphasis on high-reliability, high-efficiency power components.
The VF40M120C-M3/4W belongs to Vishay's TMBS® (Trench MOS Barrier Schottky) product line, engineered specifically for high-current, high-temperature rectification in industrial and automotive power conversion where low VF and robust surge handling are critical.
FAQ
What is the maximum junction temperature rating for VF40M120C-M3/4W?
The VF40M120C-M3/4W has a maximum operating junction temperature (TJ max.) of +150 °C, validated per JEDEC standards and confirmed in the Vishay datasheet (Document Number: 89471, Revision: 30-Nov-2023). This rating enables reliable operation in enclosed industrial enclosures and under-hood automotive environments where ambient temperatures exceed 85 °C. Derating curves in Figure 1 confirm usable current capacity down to 0 A at 175 °C case temperature - but the absolute TJ limit remains 150 °C.
Does VF40M120C-M3/4W support common-cathode configuration, and how are the pins assigned?
Yes, VF40M120C-M3/4W uses a common-cathode dual-diode configuration. Pin 1 is Anode 1, Pin 2 is the shared Cathode, and Pin 3 is Anode 2 - as explicitly shown in the "PIN 1 / PIN 2 / PIN 3" diagram on page 1 of the official datasheet. This arrangement allows independent anode routing while maintaining a low-inductance, thermally centralized cathode node essential for high-frequency freewheeling and OR-ing topologies.
What is the forward voltage specification of VF40M120C-M3/4W at 20 A and 125 °C?
The VF40M120C-M3/4W exhibits a maximum forward voltage of 0.72 V at 20 A and 125 °C, per the Electrical Characteristics table on page 2 of the Vishay datasheet (Document Number: 89471). This value is measured per diode under pulsed conditions (≤20 ms), and reflects the device's ability to maintain low conduction loss even under sustained high-temperature operation - a key advantage over conventional Schottky rectifiers.
Is VF40M120C-M3/4W halogen-free and RoHS-compliant?
Yes, VF40M120C-M3/4W carries the M3 suffix, which denotes halogen-free, RoHS-compliant construction and commercial-grade qualification per Vishay's material categorization standard (www.vishay.com/doc?99912). The molding compound meets UL 94 V-0 flammability rating, and the matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability requirements - confirming full environmental compliance for modern electronics manufacturing.
What is the thermal resistance from junction to case (RθJC) for VF40M120C-M3/4W?
The typical thermal resistance from junction to case (RθJC) for VF40M120C-M3/4W is 4.0 °C/W per diode, as specified in the Thermal Characteristics table on page 2 of the Vishay datasheet. This value applies to each of the two integrated Schottky diodes independently and assumes proper mechanical mounting to a heatsink with recommended 10 in-lb torque. It enables precise thermal modeling for systems requiring ≤60 °C temperature rise at full 20 A per diode.
VF40M120C-M3/4W Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- TMBS®
- Package/Case:
- TO-220-3 Full Pack, Isolated Tab
- 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 ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- ITO-220AB
VF40M120C-M3/4W FAQ
1.How can I place an order for VF40M120C-M3/4W through Aetrix?
Please submit a Request for Quotation (RFQ) for VF40M120C-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 VF40M120C-M3/4W reliable?
The price and inventory of VF40M120C-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 VF40M120C-M3/4W is usually 5 days.
3.What payment methods are accepted for VF40M120C-M3/4W?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VF40M120C-M3/4W transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VF40M120C-M3/4W?
VF40M120C-M3/4W orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VF40M120C-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 VF40M120C-M3/4W?
For technical support, including VF40M120C-M3/4W datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VF40M120C-M3/4W requirements.
6.How does Aetrix verify that VF40M120C-M3/4W is sourced from the original manufacturer or authorized distributors?
All VF40M120C-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 VF40M120C-M3/4W meets industry standards.
7.What is the process for return or replacement of VF40M120C-M3/4W?
All VF40M120C-M3/4W units undergo pre-shipment inspection (PSI). If there is an issue with VF40M120C-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 VF40M120C-M3/4W part is unused and in its original packaging.
Return procedure for VF40M120C-M3/4W:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VF40M120C-M3/4W Tags
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