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Vishay General Semiconductor - Diodes Division VS-18TQ035STRR-M3
- Part No.:
- VS-18TQ035STRR-M3
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Diodes
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
VS-18TQ035STRR-M3.pdf
- Description:
- DIODE SCHOTTKY 35V 18A TO263AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,910
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Product details
Overview
VS-18TQ035STRR-M3 from Vishay Semiconductors is a high-performance Schottky rectifier optimized for low reverse leakage at elevated temperatures, delivering 18 A average forward current, 35 V maximum DC reverse voltage, and 0.53 V forward voltage drop at 18 A and 125 °C junction temperature - deployed in switching power supplies and reverse battery protection circuits.
For engineers reviewing the VS-18TQ035STRR-M3 datasheet, VS-18TQ035STRR-M3 pinout, VS-18TQ035STRR-M3 application, or VS-18TQ035STRR-M3 equivalent, this device offers verified thermal ruggedness to 175 °C TJ, MSL Level 1 moisture sensitivity, JEDEC JESD47 qualification, and D2PAK (TO-263AB) surface-mount packaging with validated anode-cathode terminal mapping.
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 provides low RthJC (1.50 °C/W) and integrates a guard ring for mechanical ruggedness and long-term reliability under repetitive surge stress.
The device supports high-frequency switching applications due to low junction capacitance (1400 pF @ 5 V) and fast dV/dt capability (10,000 V/μs), with avalanche energy rating of 24 mJ and repetitive avalanche current of 3.6 A - critical for freewheeling and clamping in DC-DC converters and motor drives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) | 18 A average forward current - supports continuous conduction mode in high-power SMPS outputs |
| VR | 35 V maximum DC reverse voltage - suitable for 24 V system-level reverse polarity protection |
| VF @ 18 A, 125 °C | 0.53 V - reduces conduction losses and thermal load in high-temperature environments |
| TJ max. | 175 °C - enables operation in under-hood automotive or industrial ambient conditions without derating |
| RthJC | 1.50 °C/W - allows efficient heat transfer to heatsink, supporting compact thermal design |
| EAS | 24 mJ non-repetitive avalanche energy - withstands inductive turn-off transients in motor control freewheel paths |
| IRM @ 125 °C | 25 mA reverse leakage - ensures minimal standby power loss in battery-powered systems |
Pinout & Package
D2PAK (TO-263AB) surface-mount package with exposed thermal pad; 3-terminal configuration: Pin 1 = Anode, Pin 2 = Cathode, Pin 3 = Base (cathode tab electrically connected to Pin 2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Main current entry point; connects to input/high-side node in buck/flyback topologies |
| 2 | Cathode | Main current exit point; ties to output/low-side node and thermal pad for heat dissipation |
| 3 | Base / Cathode Tab | Electrically common with Pin 2; provides primary thermal path to PCB copper pour or heatsink |
Key Features
| Feature | Design Value |
|---|---|
| 175 °C TJ operation | Enables deployment in engine-control units and industrial inverters without thermal derating |
| Guard ring construction | Improves edge breakdown immunity and extends lifetime under repeated surge stress |
| MSL Level 1 rating | Permits standard SMT reflow without baking or special handling prior to assembly |
| Halogen-free, RoHS-compliant, Pb-free termination | Meets global environmental compliance requirements for automotive and industrial end equipment |
| High-purity epoxy encapsulation | Provides enhanced moisture resistance and mechanical robustness in humid or vibration-prone environments |
Applications
| Automotive Reverse Battery Protection | Industrial DC-DC Converter Output Rectification |
|---|---|
|
Use Scenario: Prevents damage to vehicle ECUs during incorrect battery connection in 12 V/24 V systems. IC Role / Device Role / Timing Role: Unidirectional blocking diode placed between battery input and downstream power rail. Use Value: Low VF (0.53 V) minimizes voltage drop and power loss; 175 °C rating ensures reliability near engine compartments. |
Use Scenario: High-efficiency secondary-side rectification in isolated 48 V–12 V buck-derived converters. IC Role / Device Role / Timing Role: Synchronous rectifier replacement in high-frequency (100–500 kHz) flyback or forward topologies. Use Value: 1400 pF CT and 10,000 V/μs dV/dt support clean switching with minimal ringing and EMI. |
| Server PSU Freewheeling Diode | Telecom Power Module Clamping |
|
Use Scenario: Freewheel path for synchronous MOSFETs in high-density server power supplies operating at >95 % efficiency. IC Role / Device Role / Timing Role: Fast recovery path during MOSFET off-time in multiphase VRMs. Use Value: 24 mJ EAS rating absorbs inductive energy from high-current inductors without failure. |
Use Scenario: Transient voltage clamping in -48 V telecom power modules subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Avalanche-rated clamp element across inductive loads or relay coils. Use Value: Repetitive avalanche current (3.6 A) sustains controlled energy dissipation during repeated line transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STPS1835C | Same 18 A / 35 V rating, but TO-220AC package (not surface-mount); RthJC = 2.5 °C/W vs. 1.5 °C/W | Requires through-hole mounting and larger heatsink area; unsuitable for high-density SMT layouts | Select when legacy through-hole assembly is mandated and thermal margin permits higher RthJC |
| SS1835 | Lower IRM (15 mA @ 125 °C) but only rated to 150 °C TJ; no JEDEC JESD47 qualification | Limited to commercial-temperature industrial use; not recommended for automotive or extended-temp deployments | Choose only for cost-sensitive, non-automotive applications where 175 °C operation is unnecessary |
Compared with STPS1835C and SS1835, the VS-18TQ035STRR-M3 delivers superior thermal performance in SMT form factor, full automotive-grade qualification, and guaranteed 175 °C operation - making it the preferred choice for space-constrained, high-reliability power conversion designs.
Availability
VS-18TQ035STRR-M3 is available at Aetrix Electronics and suitable for automotive reverse battery protection, industrial DC-DC converter output rectification, and server PSU freewheeling applications requiring stable component supply, consistent lead-time visibility, and long-term lifecycle assurance.
Supply support for VS-18TQ035STRR-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 Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The VS-18TQ series targets high-temperature, high-current power conversion - engineered specifically for demanding applications like engine control, telecom rectifiers, and server PSUs where leakage, thermal stability, and avalanche robustness are critical.
FAQ
What is the maximum junction temperature rating for VS-18TQ035STRR-M3?
The VS-18TQ035STRR-M3 is rated for a maximum junction temperature of 175 °C, validated per JEDEC JESD47 qualification. This enables reliable operation in under-hood automotive environments and high-ambient industrial settings without thermal derating - a key differentiator versus standard 150 °C Schottky rectifiers.
Does VS-18TQ035STRR-M3 have a guard ring structure?
Yes, the VS-18TQ035STRR-M3 incorporates a guard ring to enhance edge breakdown immunity and improve long-term reliability under repetitive surge stress. This feature directly contributes to its 24 mJ non-repetitive avalanche energy rating and suitability for freewheeling and clamping applications.
What is the thermal resistance from junction to case (RthJC) for VS-18TQ035STRR-M3?
The VS-18TQ035STRR-M3 has a maximum thermal resistance of 1.50 °C/W from junction to case under DC operation. This low RthJC, combined with its D2PAK (TO-263AB) package and exposed cathode tab, enables efficient heat transfer to PCB copper pours or external heatsinks in high-power density designs.
Is VS-18TQ035STRR-M3 compliant with RoHS and halogen-free standards?
Yes, the VS-18TQ035STRR-M3 is halogen-free, RoHS-compliant, and features lead (Pb)-free termination - fully meeting global environmental regulations including EU RoHS Directive 2011/65/EU and JEDEC JS709C. The "-M3" suffix explicitly denotes this compliance status.
What is the reverse leakage current of VS-18TQ035STRR-M3 at 125 °C?
The VS-18TQ035STRR-M3 exhibits a maximum reverse leakage current (IRM) of 25 mA at 125 °C and rated VR (35 V). This low leakage - optimized via proprietary barrier technology - minimizes standby power loss in battery-backed systems and improves efficiency in high-temperature operating conditions.
VS-18TQ035STRR-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:
- Tape & Reel (TR)
- 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-18TQ035STRR-M3 FAQ
1.How can I place an order for VS-18TQ035STRR-M3 through Aetrix?
Please submit a Request for Quotation (RFQ) for VS-18TQ035STRR-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-18TQ035STRR-M3 reliable?
The price and inventory of VS-18TQ035STRR-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-18TQ035STRR-M3 is usually 5 days.
3.What payment methods are accepted for VS-18TQ035STRR-M3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VS-18TQ035STRR-M3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VS-18TQ035STRR-M3?
VS-18TQ035STRR-M3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VS-18TQ035STRR-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-18TQ035STRR-M3?
For technical support, including VS-18TQ035STRR-M3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VS-18TQ035STRR-M3 requirements.
6.How does Aetrix verify that VS-18TQ035STRR-M3 is sourced from the original manufacturer or authorized distributors?
All VS-18TQ035STRR-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-18TQ035STRR-M3 meets industry standards.
7.What is the process for return or replacement of VS-18TQ035STRR-M3?
All VS-18TQ035STRR-M3 units undergo pre-shipment inspection (PSI). If there is an issue with VS-18TQ035STRR-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-18TQ035STRR-M3 part is unused and in its original packaging.
Return procedure for VS-18TQ035STRR-M3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VS-18TQ035STRR-M3 Tags
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