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Vishay General Semiconductor - Diodes Division VS-ST083S12PFK0L
- Part No.:
- VS-ST083S12PFK0L
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- SCRs
- Package:
- TO-209AC, TO-94-4, Stud
- Datasheet:
-
VS-ST083S12PFK0L.pdf
- Description:
- SCR 1.2KV 135A TO209AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,367
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Product details
Overview
VS-ST083S12PFK0L from Vishay Semiconductors is an inverter-grade stud-mount silicon-controlled rectifier (SCR) with 85 A average on-state current, 1200 V repetitive peak off-state voltage (VRRM), and 2.15 V maximum on-state voltage at 300 A. It features center amplifying gate design, 10–20 μs turn-off time, and low thermal impedance (0.195 K/W junction-to-case) for high-efficiency power conversion in forced-commutated industrial systems.
For engineers reviewing the VS-ST083S12PFK0L datasheet, VS-ST083S12PFK0L pinout, VS-ST083S12PFK0L application, or VS-ST083S12PFK0L equivalent, this device is selected for high-reliability inverter, induction heating, and chopper circuits where surge robustness (2560 A @ 60 Hz), fast switching, and thermal stability up to 125 °C are critical.
Technical Context
This SCR uses compression bonding and a center amplifying gate structure to achieve high dI/dt capability (1000 A/μs) and low triggering gate current (200 mA). Its TO-94 (TO-209AC) stud package enables direct heatsink mounting with 15.5 N·m torque specification and 0.08 K/W case-to-heatsink thermal resistance under greased conditions.
The device operates across -40 °C to +125 °C junction temperature range and supports sinusoidal conduction angles from 30° to 180°, with thermal resistance increment (ΔRthJC) precisely characterized per conduction angle - enabling accurate thermal design for variable-duty-cycle applications like motor drives and UPS systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(AV) | 85 A average on-state current at 85 °C case temperature - defines continuous DC or half-sine load handling capacity |
| VRRM | 1200 V repetitive peak reverse voltage - sets maximum blocking capability in AC line or DC bus applications |
| VTM | 2.15 V max on-state voltage at 300 A - determines conduction loss and thermal dissipation at rated current |
| ITSM @ 60 Hz | 2560 A non-repetitive surge current - supports short-circuit withstand and motor-start transient energy |
| tq | 10–20 μs turn-off time - enables operation up to 400 Hz in forced-commutated converters |
| dV/dt | 500 V/μs critical rate of rise of off-state voltage - defines snubber requirements for reliable commutation |
| RthJC | 0.195 K/W junction-to-case thermal resistance (DC) - enables precise heatsink sizing for thermal management |
Pinout & Package
VS-ST083S12PFK0L uses a TO-94 (TO-209AC) stud-mount package with 1/2"-20UNF-2A threaded base, ceramic housing, and flexible leads: red cathode, white gate, and red auxiliary cathode (per Vishay Doc #95003). Mounting torque is 15.5 N·m (137 lbf·in) for non-lubricated threads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Stud Base) | Main current input terminal | Electrically and thermally coupled to heatsink via threaded stud - requires insulated mounting hardware when referenced to ground |
| Cathode (Red Lead) | Main current output terminal | Flexible 2.6 mm² lead for low-inductance connection to load or bus; must be routed away from gate path to avoid noise coupling |
| Gate (White Lead) | Trigger control input | Low-impedance gate drive path requiring ≤3 V trigger voltage and ≥200 mA DC current; sensitive to dV/dt-induced false turn-on |
| Auxiliary Cathode (Red Lead) | Reference node for gate circuit | Provides isolated return path for gate drive to minimize common-mode noise and improve triggering reliability in high-dV/dt environments |
Key Features
| Feature | Design Value |
|---|---|
| Center amplifying gate | Reduces required gate drive power and improves turn-on uniformity across large-area silicon - critical for paralleling and high-current reliability |
| High surge current capability | 2560 A @ 60 Hz (8.3 ms) - enables robust operation during motor stall, short-circuit, or inrush events without fusing |
| Low thermal impedance | 0.195 K/W RthJC (DC) - allows higher power density and smaller heatsinks compared to standard SCRs in same current class |
| Compression bonding | Eliminates wire bonds and reduces interfacial thermal resistance - enhances long-term thermal cycling reliability in industrial environments |
| Industrial qualification | Designed and qualified per industrial-level standards - validated for continuous operation at TJ = 125 °C and storage up to 150 °C |
Applications
| Motor Drive Inverters | Induction Heating Systems |
|---|---|
Use Scenario: Three-phase voltage-source inverter supplying variable-frequency AC to industrial induction motors in HVAC, pumps, and compressors. IC Role / Device Role / Timing Role: Main switching element in phase-leg configuration, conducting during positive half-cycles and commutated by anti-parallel diodes or auxiliary circuits. Use Value: 1200 V VRRM and 2560 A ITSM support 480 VAC line-fed systems with high transient immunity; 10–20 μs tq enables 400 Hz PWM-equivalent switching in resonant topologies. | Use Scenario: Medium-frequency (1–10 kHz) series-resonant inverter delivering high-current AC to induction coils for metal hardening, brazing, or melting. IC Role / Device Role / Timing Role: Unidirectional main switch in asymmetrical half-bridge or single-ended topology, triggered synchronously with zero-voltage crossing for soft commutation. Use Value: Low VTM (2.15 V) minimizes conduction loss at 500–1000 A RMS currents; compression bonding ensures stable thermal performance under cyclic 100+ °C junction swings. |
| DC Choppers | Force-Commutated Converters |
Use Scenario: High-power DC-DC step-down converter for traction battery regulation in electric forklifts and mining vehicles. IC Role / Device Role / Timing Role: Series-pass switch controlling average output voltage via duty-cycle modulation; turned off by external LC snubber or auxiliary thyristor. Use Value: 1000 A/μs dI/dt rating supports rapid current interruption; 0.195 K/W RthJC enables compact heatsink integration in space-constrained vehicle enclosures. | Use Scenario: Line-commutated or forced-commutated AC/DC converter for electroplating, electrolysis, or DC arc furnace control. IC Role / Device Role / Timing Role: Main rectifier element in multi-pulse configurations (6- or 12-pulse), gated to regulate DC output voltage and current. Use Value: 85 A IT(AV) and 135 A IT(RMS) sustain continuous 100+ kW loads; 500 V/μs dV/dt rating reduces snubber component count in high-di/dt line-reactor circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SCR applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST8512S | Same TO-94 package, 85 A IT(AV), 1200 V VRRM, but 30 μs tq and no auxiliary cathode lead | Lacks auxiliary cathode - requires more careful gate layout to suppress dV/dt false triggering in noisy environments | Select ST8512S only if gate drive isolation is implemented externally and tq > 20 μs is acceptable |
| SKKT105/12E | 105 A IT(AV), 1200 V VRRM, 25 μs tq, press-fit stud mount, integrated heat sink interface | Higher current rating and different mechanical interface - requires redesign of mounting hardware and thermal interface | Choose SKKT105/12E when upgrading system current capacity beyond 85 A or when using modular press-fit assembly processes |
Compared with ST8512S and SKKT105/12E, VS-ST083S12PFK0L offers superior turn-off speed (10–20 μs vs. 25–30 μs) and built-in auxiliary cathode for enhanced gate noise immunity - making it optimal for high-frequency, high-noise industrial inverters where reliability and compact snubber design are prioritized.
Availability
VS-ST083S12PFK0L is available at Aetrix Electronics and suitable for motor drive inverters, induction heating systems, DC choppers, and force-commutated converters requiring stable component supply, long-life thermal cycling performance, and industrial-grade surge robustness.
Supply support for VS-ST083S12PFK0L 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 power devices, optoelectronics, and passive components for industrial, automotive, and computing markets.
The VS-ST083SP Series is part of Vishay's inverter-grade thyristor product line, engineered specifically for high-efficiency, high-surge industrial power conversion - emphasizing thermal stability, fast commutation, and ruggedized mechanical construction for demanding factory-floor environments.
FAQ
What is the maximum allowable junction temperature for VS-ST083S12PFK0L?
The maximum junction operating temperature for VS-ST083S12PFK0L is +125 °C, as specified in the Vishay datasheet (Document Number 94334). This rating applies under continuous conduction with proper heatsinking and case temperature maintained at or below 85 °C. Exceeding 125 °C risks irreversible degradation of the silicon die and reduced long-term reliability. Thermal design must account for RthJC = 0.195 K/W and conduction-angle-dependent ΔRthJC values shown in the datasheet's thermal tables.
Does VS-ST083S12PFK0L require a snubber circuit, and if so, what are the recommended values?
Yes, VS-ST083S12PFK0L requires a snubber circuit to limit dV/dt during turn-off and prevent false triggering. Vishay recommends Rs = 22 Ω and Cs = 0.15 µF for 50 Hz operation with 80 % VDRM applied, as documented in Figures 11–13 of the datasheet. These values are validated for TC = 60 °C and 85 °C, and support safe commutation at tq = 10–20 μs. Snubber selection must also consider actual circuit dI/dt and recovery characteristics measured under load.
What is the meaning of the "FK" and "0L" suffixes in VS-ST083S12PFK0L?
In VS-ST083S12PFK0L, "FK" indicates a 20 μs maximum turn-off time (tq) under test condition VR = 50 V, while "0L" denotes standard 500 V/μs critical dV/dt rating and eyelet terminals (0) with lead-free finish (P) and stud base (L). The "12" corresponds to 1200 V VRRM, "S" confirms compression bonding stud construction, and "P" specifies Pb-free compliance per Vishay's ordering nomenclature (Doc #94334, p.8).
Can VS-ST083S12PFK0L be used in parallel configurations, and what design considerations apply?
VS-ST083S12PFK0L supports parallel operation due to its center amplifying gate structure, which promotes uniform current sharing. However, successful paralleling requires matched gate drive timing (≤100 ns skew), identical snubber networks, symmetrical busbar layout, and thermal coupling via shared heatsink. Vishay recommends derating total current by 15 % and verifying static/dynamic current balance under worst-case load and temperature conditions before full deployment.
What is the gate trigger current requirement for VS-ST083S12PFK0L at maximum junction temperature?
The maximum DC gate current required to trigger VS-ST083S12PFK0L at TJ = 125 °C is not explicitly specified, but the datasheet guarantees IGT ≤ 200 mA at TJ = 25 °C. At elevated temperatures, IGT typically decreases; however, design margins should maintain ≥300 mA peak gate drive capability to ensure reliable turn-on across the full -40 °C to +125 °C junction range, especially under high dV/dt stress or aging conditions.
VS-ST083S12PFK0L Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- TO-209AC, TO-94-4, Stud
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Off State:
- 1.2 kV
- Voltage - Gate Trigger (Vgt) (Max):
- 3 V
- Current - Gate Trigger (Igt) (Max):
- 200 mA
- Voltage - On State (Vtm) (Max):
- 2.15 V
- Current - On State (It (AV)) (Max):
- 85 A
- Current - On State (It (RMS)) (Max):
- 135 A
- Current - Hold (Ih) (Max):
- 600 mA
- Current - Off State (Max):
- 30 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 2060A, 2160A
- SCR Type:
- Standard Recovery
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis, Stud Mount
- Supplier Device Package:
- TO-209AC (TO-94)
VS-ST083S12PFK0L FAQ
1.How can I place an order for VS-ST083S12PFK0L through Aetrix?
Please submit a Request for Quotation (RFQ) for VS-ST083S12PFK0L 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-ST083S12PFK0L reliable?
The price and inventory of VS-ST083S12PFK0L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VS-ST083S12PFK0L is usually 5 days.
3.What payment methods are accepted for VS-ST083S12PFK0L?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VS-ST083S12PFK0L transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VS-ST083S12PFK0L?
VS-ST083S12PFK0L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VS-ST083S12PFK0L 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-ST083S12PFK0L?
For technical support, including VS-ST083S12PFK0L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VS-ST083S12PFK0L requirements.
6.How does Aetrix verify that VS-ST083S12PFK0L is sourced from the original manufacturer or authorized distributors?
All VS-ST083S12PFK0L 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-ST083S12PFK0L meets industry standards.
7.What is the process for return or replacement of VS-ST083S12PFK0L?
All VS-ST083S12PFK0L units undergo pre-shipment inspection (PSI). If there is an issue with VS-ST083S12PFK0L, 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-ST083S12PFK0L part is unused and in its original packaging.
Return procedure for VS-ST083S12PFK0L:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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