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Vishay General Semiconductor - Diodes Division VS-70HF80
- Part No.:
- VS-70HF80
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Diodes
- Package:
- DO-203AB, DO-5, Stud
- Datasheet:
-
VS-70HF80.pdf
- Description:
- DIODE GEN PURP 800V 70A DO203AB
- Quantity:
- Payment:
- Shipping:
Inventory:52
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Product details
Overview
VS-70HF80 from Vishay Semiconductors is a standard recovery power diode in DO-5 (DO-203AB) stud-mount package, rated for 70 A average forward current, 800 V maximum repetitive peak reverse voltage (VRRM), and 1250 A non-repetitive surge current at 60 Hz. It operates with junction temperature up to +180 °C and is designed for high-reliability industrial rectification in battery chargers and machine tool controls.
For engineers reviewing the VS-70HF80 datasheet, VS-70HF80 pinout, VS-70HF80 application, or VS-70HF80 equivalent, this page delivers verified electrical ratings, thermal resistance data, forward voltage characteristics, mounting torque specifications, and real-world rectifier use cases - all confirmed from Vishay's official VS-70HF(R) Series documentation (Doc. #93521, Rev. 11-Jan-18).
Technical Context
This diode employs a planar-junction silicon structure optimized for robust surge handling and stable conduction under high-temperature, high-current industrial conditions. Its 0.45 K/W junction-to-case thermal resistance and stud-mount mechanical interface enable direct attachment to heatsinks without insulating washers when polarity permits.
The VS-70HF80 exhibits dual-slope forward voltage behavior: VF(TO)1 = 0.79 V and rf1 = 2.33 mΩ at low conduction levels, shifting to VF(TO)2 = 1.00 V and rf2 = 1.53 mΩ at full conduction - enabling accurate power loss modeling across operating ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - blocks up to 800 V reverse voltage repeatedly; matches 800 V DC bus or 566 V RMS AC line applications. |
| IF(AV) | 70 A at TC = 140 °C - supports continuous 70 A average forward current with case temperature held at 140 °C. |
| IFSM (60 Hz) | 1250 A - withstands 1250 A single half-sine surge for 8.3 ms without failure; critical for inrush-limited converters. |
| I²t (60 Hz) | 6450 A²s - quantifies fusing energy limit; used to coordinate upstream fuse selection per IEC 60127. |
| RthJC | 0.45 K/W - defines thermal path efficiency from junction to stud base; enables precise heatsink sizing. |
| VFM | 1.46 V at 220 A, 25 °C - measured forward drop under pulsed high-current condition; informs peak conduction loss. |
| TJ Range | –65 °C to +180 °C - wide operating junction temperature range supports harsh industrial environments. |
Pinout & Package
VS-70HF80 uses a two-terminal DO-5 (DO-203AB) stud-mount package: one terminal is the cathode stud (metal base), the other is the anode lead (axial wire). Mounting requires threaded engagement into a heatsink - either 1/4"-28UNF-2A or M6 × 1 stud base depending on variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode Stud | DC output / negative return path | Electrically and thermally connected to case; must be isolated from chassis unless circuit topology permits common-cathode grounding. |
| Anode Lead | AC input / positive feed path | Insulated axial wire; connects to transformer secondary or bridge AC node; requires mechanical strain relief. |
Key Features
| Feature | Design Value |
|---|---|
| High surge current capability | 1250 A IFSM at 60 Hz enables reliable operation during motor-start surges and capacitor-charging transients. |
| Stud-mount thermal interface | 0.25 K/W RthCS (case-to-heatsink) with greased, flat mounting surface ensures efficient heat extraction without thermal pads. |
| Industrial qualification | Rated for –65 °C to +180 °C TJ range and qualified per industrial-level reliability standards per Vishay Doc. #93521. |
| Low forward voltage slope | rf2 = 1.53 mΩ at high conduction reduces resistive losses in high-current DC output stages. |
Applications
| Battery Chargers | Machine Tool Controls |
|---|---|
Use Scenario: High-current AC-to-DC conversion for industrial battery charging systems delivering >5 kW output. IC Role / Device Role / Timing Role: Main rectifier in uncontrolled three-phase or single-phase bridge configuration. Use Value: 70 A IF(AV) and 1250 A IFSM support sustained charge currents and tolerate repeated inrush events during battery reconnection. | Use Scenario: DC power supply for CNC controller logic, servo drives, and hydraulic valve banks. IC Role / Device Role / Timing Role: Output-stage rectifier converting transformer-derived AC to regulated DC bus. Use Value: 180 °C max TJ rating allows operation in enclosed cabinets with ambient temperatures up to 70 °C without derating. |
| Industrial Power Supplies | Welding Equipment Rectifiers |
Use Scenario: Front-end rectification in DIN-rail mounted 3 kW industrial SMPS units. IC Role / Device Role / Timing Role: Input rectifier handling line-frequency conduction with minimal thermal cycling stress. Use Value: 0.45 K/W RthJC enables compact heatsink design while maintaining <125 °C junction under full load. | Use Scenario: Primary rectification in resistance spot welders requiring high peak current delivery. IC Role / Device Role / Timing Role: Heavy-duty main diode conducting short-duration, high-amplitude pulses. Use Value: 6450 A²s I²t rating ensures survival through repetitive 10 kA-equivalent pulse trains without metallurgical fatigue. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar standard recovery diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VSKY70-08 | Same 800 V VRRM and 70 A IF(AV), but TO-247AC package with insulated tab and lower RthJC (0.35 K/W). | Requires PCB mount and isolation hardware; better suited for space-constrained designs needing higher thermal performance. | Select VSKY70-08 when board-level integration and lower thermal resistance outweigh stud-mount mechanical simplicity. |
| VS-70HFR80 | Identical specs except reverse polarity: anode-to-stud instead of cathode-to-stud; same DO-5 package and mounting footprint. | Necessitates reversed heatsink isolation strategy and altered PCB layout for anode-grounded topologies. | Choose VS-70HFR80 only when circuit architecture requires anode-referenced mounting or shared heatsink with complementary devices. |
Compared with VSKY70-08 and VS-70HFR80, the VS-70HF80 provides optimal mechanical robustness and field-serviceability via its cathode-stud configuration, making it preferred for bolt-down industrial rectifier assemblies where polarity alignment and thermal mass stability are prioritized over packaging density.
Availability
VS-70HF80 is available at Aetrix Electronics and suitable for battery chargers, machine tool controls, and industrial power supplies requiring stable component supply, long-life thermal cycling endurance, and proven surge resilience in harsh environments.
Supply support for VS-70HF80 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 industrial, automotive, and computing markets.
The VS-70HF(R) Series is part of Vishay's industrial-grade standard recovery diode family, engineered specifically for ruggedized rectification in high-current, high-temperature power conversion systems.
FAQ
What is the maximum junction temperature rating for VS-70HF80?
The VS-70HF80 has a maximum junction temperature (TJ) rating of +180 °C, as specified in Vishay's official VS-70HF(R) Series datasheet (Document Number 93521). This rating applies to the 100 V to 1200 V subfamily, which includes the VS-70HF80. Operation at this temperature requires appropriate heatsinking and thermal management to maintain reliability over lifetime.
Does VS-70HF80 have a stud-anode or stud-cathode configuration?
The VS-70HF80 uses a stud-cathode configuration: the metal stud serves as the cathode terminal, and the axial lead is the anode. This is confirmed by Vishay's ordering code interpretation - absence of "R" in the part number denotes normal polarity (cathode to stud). The VS-70HFR80 variant carries the "R" suffix for reverse polarity.
What is the forward voltage drop of VS-70HF80 at rated current?
The VS-70HF80 exhibits a maximum forward voltage drop (VFM) of 1.46 V at 220 A peak current, 25 °C junction temperature, and 400 μs rectangular pulse width. At lower currents and higher temperatures, VF follows a dual-slope model: VF(TO)1 = 0.79 V and rf1 = 2.33 mΩ below π × IF(AV), rising to VF(TO)2 = 1.00 V and rf2 = 1.53 mΩ above that threshold.
Can VS-70HF80 be used in a three-phase full-wave rectifier bridge?
Yes, VS-70HF80 is commonly deployed in three-phase full-wave rectifier bridges due to its 70 A average forward current rating, 1250 A surge capability at 60 Hz, and 800 V VRRM - sufficient for 480 V AC line-fed systems with safety margin. Its DO-5 stud-mount form factor allows direct bolting to a common heatsink for all six diodes in the bridge assembly.
What is the recommended mounting torque for VS-70HF80?
Vishay specifies a maximum mounting torque of 3.4 N·m (30 lbf·in) for VS-70HF80 when using a non-lubricated thread and tightening on the nut, and 4.2 N·m (37 lbf·in) when tightening on the hexagon. Over-torquing risks stud deformation or internal bond damage; under-torquing increases thermal resistance and may cause premature failure under thermal cycling.
VS-70HF80 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- DO-203AB, DO-5, Stud
- Packaging:
- Bulk
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 800 V
- Current - Average Rectified (Io):
- 70A
- Voltage - Forward (Vf) (Max) @ If:
- 1.35 V @ 220 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 9 mA @ 800 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis, Stud Mount
- Supplier Device Package:
- DO-203AB (DO-5)
- Operating Temperature - Junction:
- -65°C ~ 150°C
VS-70HF80 FAQ
1.How can I place an order for VS-70HF80 through Aetrix?
Please submit a Request for Quotation (RFQ) for VS-70HF80 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-70HF80 reliable?
The price and inventory of VS-70HF80 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VS-70HF80 is usually 5 days.
3.What payment methods are accepted for VS-70HF80?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VS-70HF80 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VS-70HF80?
VS-70HF80 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VS-70HF80 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-70HF80?
For technical support, including VS-70HF80 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VS-70HF80 requirements.
6.How does Aetrix verify that VS-70HF80 is sourced from the original manufacturer or authorized distributors?
All VS-70HF80 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-70HF80 meets industry standards.
7.What is the process for return or replacement of VS-70HF80?
All VS-70HF80 units undergo pre-shipment inspection (PSI). If there is an issue with VS-70HF80, 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-70HF80 part is unused and in its original packaging.
Return procedure for VS-70HF80:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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