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Vishay General Semiconductor - Diodes Division VS-18TQ035S-M3
- Part No.:
- VS-18TQ035S-M3
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Diodes
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
VS-18TQ035S-M3.pdf
- Description:
- DIODE SCHOTTKY 35V 18A TO263AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,646
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Product details
Overview
VS-18TQ035S-M3 from Vishay Semiconductors is a high-performance Schottky rectifier optimized for low reverse leakage at elevated temperatures, rated for 18 A average forward current and 35 V maximum DC reverse voltage, with 0.53 V forward voltage drop at 18 A and 125 °C junction temperature-used in switching power supplies, freewheeling circuits, and reverse battery protection.
For engineers reviewing the VS-18TQ035S-M3 datasheet, VS-18TQ035S-M3 pinout, VS-18TQ035S-M3 application, or VS-18TQ035S-M3 equivalent, this device offers verified thermal ruggedness to 175 °C, MSL Level 1 moisture sensitivity, JEDEC JESD47 qualification, and D2PAK (TO-263AB) surface-mount packaging suitable for high-reliability industrial and automotive power conversion designs.
Technical Context
This Schottky rectifier employs proprietary barrier technology enabling stable operation up to 175 °C junction temperature while maintaining low VF (0.53 V @ 18 A, 125 °C) and low IRM (25 mA @ 125 °C). Its D2PAK package delivers 1.50 °C/W junction-to-case thermal resistance and integrates a guard ring for enhanced mechanical ruggedness and long-term reliability under repetitive surge stress.
The device supports high-frequency switching with 10,000 V/μs dV/dt rating and exhibits 1400 pF junction capacitance at 5 V reverse bias. It is qualified per JEDEC JESD47, meets MSL Level 1 (245 °C peak reflow), and uses halogen-free, RoHS-compliant, lead (Pb)-free terminations per -M3 suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) | 18 A - maximum continuous DC or rectangular-wave forward current at TC = 149 °C, defining thermal design margin for heatsink sizing |
| VR | 35 V - maximum DC reverse voltage, sets safe operating limit for reverse-biased blocking in power supply output stages |
| VF @ 18 A, 125 °C | 0.53 V - low conduction loss enabling high-efficiency rectification in high-temperature environments |
| IRM @ 125 °C | 25 mA - low reverse leakage ensures minimal standby power loss in battery-protection and hold-up circuits |
| TJ max. | 175 °C - extended junction temperature rating allows operation in compact, thermally constrained enclosures without derating |
| EAS | 24 mJ - non-repetitive avalanche energy capability supports robustness during unclamped inductive switching events |
| RthJC | 1.50 °C/W - low thermal resistance enables efficient heat transfer to PCB copper or external heatsink |
Pinout & Package
D2PAK (TO-263AB) surface-mount package with exposed thermal pad on underside; 3-terminal configuration optimized for high-current, high-thermal-demand applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Main anode connection for forward current path; electrically tied to internal die anode structure |
| 2 | Cathode | Main cathode terminal; connects to internal die cathode and serves as primary thermal and electrical return path |
| 3 | Anode (second die) | Second anode terminal for dual-die configuration; used in parallel-anode topologies to reduce inductance and improve current sharing |
Key Features
| Feature | Design Value |
|---|---|
| 175 °C TJ operation | Enables reliable use in under-hood automotive, industrial motor drives, and enclosed power supplies where ambient exceeds 100 °C |
| Guard ring construction | Improves edge termination robustness against voltage transients and mechanical stress, extending lifetime in harsh environments |
| MSL Level 1 rating | Permits standard SMT reflow without pre-baking, reducing manufacturing complexity and cost for high-volume assembly |
| High-purity epoxy encapsulation | Provides superior moisture resistance and mechanical strength, meeting IPC/JEDEC standards for long-term field reliability |
| JEDEC JESD47 qualification | Confirms reliability across temperature cycling, humidity bias, and accelerated life testing per industry-standard stress protocols |
Applications
| Switching Power Supply Output Rectification | Automotive Reverse Battery Protection |
|---|---|
Use Scenario: High-efficiency 12 V/24 V DC-DC converter output stage in telecom or server PSUs. IC Role / Device Role / Timing Role: Primary Schottky rectifier conducting continuous 18 A forward current with minimal conduction loss. Use Value: 0.53 V VF at 125 °C reduces power dissipation by >1.5 W vs. comparable 40 V devices, lowering thermal load on PCB. |
Use Scenario: Polarity protection circuit in vehicle infotainment or ADAS ECU powered from 12 V battery rail. IC Role / Device Role / Timing Role: Low-VF series-blocking diode preventing damage during accidental reverse battery connection. Use Value: 35 V VR rating provides 5 V margin above nominal 12 V system, while 25 mA IRM at 125 °C minimizes quiescent drain. |
| Freewheeling Diode in Motor Drives | Industrial DC Link Clamping |
Use Scenario: Freewheeling path for brushed DC or BLDC motor phase currents in factory automation drives. IC Role / Device Role / Timing Role: Fast-recovery freewheeling diode handling repetitive 18 A peak currents during PWM commutation. Use Value: 10,000 V/μs dV/dt rating prevents false turn-on during fast-switching IGBT/MOSFET transitions. |
Use Scenario: Clamping diode in regenerative braking circuits of industrial inverters with 30–40 V DC link. IC Role / Device Role / Timing Role: Avalanche-rated clamping element absorbing inductive energy during fault conditions. Use Value: 24 mJ EAS rating supports single-event energy absorption without degradation, validated per JEDEC test conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STPS1835CG-TR | Same 35 V VR and 18 A IF(AV), but TO-220AC package; higher RthJC (2.5 °C/W) and no dual-anode pinout | Requires through-hole mounting and larger heatsink area; unsuitable for space-constrained SMT layouts | Select when legacy through-hole assembly or lower-cost procurement outweighs thermal and layout advantages of D2PAK |
| ON Semiconductor NRVB1835CT | 35 V VR, 18 A IF(AV), D2PAK package, but rated only to 150 °C TJ and higher VF (0.62 V @ 18 A, 125 °C) | Limited to lower-temperature environments; higher conduction loss increases thermal design burden | Select when 150 °C max TJ suffices and cost sensitivity overrides need for extended temperature margin |
Compared with STPS1835CG-TR and NRVB1835CT, the VS-18TQ035S-M3 delivers superior thermal performance (1.50 °C/W vs. ≥2.5 °C/W), extended 175 °C operation, and dual-anode layout for reduced parasitic inductance-making it optimal for high-density, high-reliability SMT power conversion where thermal headroom and layout efficiency are critical.
Availability
VS-18TQ035S-M3 is available at Aetrix Electronics and suitable for switching power supplies, reverse battery protection circuits, and freewheeling diode applications requiring stable component supply, long-lifecycle support, and traceable sourcing for industrial and automotive programs.
Supply support for VS-18TQ035S-M3 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 Intertechnology is a global semiconductor manufacturer specializing in discrete components, sensors, and passive elements, with leadership in power semiconductors and high-reliability solutions.
The VS-18TQ035S-M3 belongs to Vishay's high-temperature Schottky rectifier product line, engineered specifically for demanding power conversion applications where low VF, high TJ, and rugged packaging are essential-such as automotive body electronics, industrial motor controls, and telecom infrastructure.
FAQ
What is the maximum junction temperature rating for VS-18TQ035S-M3?
The VS-18TQ035S-M3 is rated for a maximum junction temperature of 175 °C, verified per JEDEC JESD47 qualification. This enables operation in high-ambient environments such as engine compartments or sealed industrial enclosures where conventional Schottky rectifiers would require significant derating. The 175 °C rating is supported by proprietary barrier technology and high-purity epoxy encapsulation in the VS-18TQ035S-M3.
Does VS-18TQ035S-M3 have a dual-anode configuration, and how is it implemented?
Yes, the VS-18TQ035S-M3 features a dual-anode configuration with pins 1 and 3 both designated as anodes and pin 2 as the common cathode. This layout reduces effective series inductance and improves current sharing in high-frequency switching applications. The dual-anode structure is confirmed in the official Vishay datasheet (Doc. #94928) and is physically realized via two parallel-connected Schottky die within the D2PAK package of the VS-18TQ035S-M3.
What is the thermal resistance from junction to case (RthJC) for VS-18TQ035S-M3?
The VS-18TQ035S-M3 has a maximum junction-to-case thermal resistance (RthJC) of 1.50 °C/W under DC operation, measured per Figure 4 in Vishay Document #94928. This low value reflects the efficient thermal path from the silicon die through the copper leadframe and exposed thermal pad to the PCB, enabling compact heatsinking and supporting high-power density designs using the VS-18TQ035S-M3.
Is VS-18TQ035S-M3 suitable for reflow soldering, and what is its moisture sensitivity level?
Yes, the VS-18TQ035S-M3 is qualified for standard lead-free reflow soldering and meets MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 245 °C. No pre-baking is required prior to assembly, simplifying manufacturing flow. This MSL Level 1 rating is documented in the Vishay datasheet (Rev. 21-Dec-2021, Doc. #94928) and applies specifically to the VS-18TQ035S-M3 in its D2PAK packaging.
What is the non-repetitive avalanche energy (EAS) rating of VS-18TQ035S-M3, and under what conditions is it specified?
The VS-18TQ035S-M3 is rated for 24 mJ of non-repetitive avalanche energy (EAS) at TJ = 25 °C, with IAS = 3.6 A and L = 3.7 mH, per the unclamped inductive test circuit defined in Figure 8 of Vishay Document #94928. This rating confirms the device's ability to safely absorb inductive energy during transient overvoltage events without failure, a key reliability parameter for freewheeling and clamping applications using the VS-18TQ035S-M3.
VS-18TQ035S-M3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 35 V
- Current - Average Rectified (Io):
- 18A
- Voltage - Forward (Vf) (Max) @ If:
- 600 mV @ 18 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 2.5 mA @ 35 V
- Capacitance @ Vr, F:
- 1400pF @ 5V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263AB (D2PAK)
- Operating Temperature - Junction:
- -55°C ~ 175°C
VS-18TQ035S-M3 FAQ
1.How can I place an order for VS-18TQ035S-M3 through Aetrix?
Please submit a Request for Quotation (RFQ) for VS-18TQ035S-M3 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 VS-18TQ035S-M3 reliable?
The price and inventory of VS-18TQ035S-M3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VS-18TQ035S-M3 is usually 5 days.
3.What payment methods are accepted for VS-18TQ035S-M3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VS-18TQ035S-M3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VS-18TQ035S-M3?
VS-18TQ035S-M3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VS-18TQ035S-M3 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 VS-18TQ035S-M3?
For technical support, including VS-18TQ035S-M3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VS-18TQ035S-M3 requirements.
6.How does Aetrix verify that VS-18TQ035S-M3 is sourced from the original manufacturer or authorized distributors?
All VS-18TQ035S-M3 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 VS-18TQ035S-M3 meets industry standards.
7.What is the process for return or replacement of VS-18TQ035S-M3?
All VS-18TQ035S-M3 units undergo pre-shipment inspection (PSI). If there is an issue with VS-18TQ035S-M3, 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 VS-18TQ035S-M3 part is unused and in its original packaging.
Return procedure for VS-18TQ035S-M3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VS-18TQ035S-M3 Tags
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