My Inquiry
My Account
Vishay General Semiconductor - Diodes Division VS-70HFR80
- Part No.:
- VS-70HFR80
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Diodes
- Package:
- DO-203AB, DO-5, Stud
- Datasheet:
-
VS-70HFR80.pdf
- Description:
- DIODE GEN PURP 800V 70A DO203AB
- Quantity:
- Payment:
- Shipping:
Inventory:26
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
VS-70HFR80 from Vishay Semiconductors is a standard recovery power diode in stud-mount DO-5 (DO-203AB) package, rated for 70 A average forward current, 800 V maximum repetitive peak reverse voltage (VRRM), and 1200 A non-repetitive surge current at 50 Hz. It features low thermal resistance (RthJC = 0.45 K/W), high junction temperature capability (+180 °C), and reverse polarity configuration (anode-to-stud), making it suitable for industrial rectification in high-power battery chargers and machine tool controls.
For engineers reviewing the VS-70HFR80 datasheet, VS-70HFR80 pinout, VS-70HFR80 application, or VS-70HFR80 equivalent, this page delivers verified electrical ratings, thermal performance data, stud-mount mechanical interface details, and real-world application context - all aligned with Vishay Document #93521 (Rev. 11-Jan-18).
Technical Context
The VS-70HFR80 operates as a single-element, stud-mounted standard recovery diode with anode-connected-to-stud polarity. Its conduction behavior follows a dual-slope forward voltage model: VF(TO)1 = 0.79 V and rf1 = 2.33 mΩ at low-current conduction (16.7–100% π×IF(AV)), rising to VF(TO)2 = 1.00 V and rf2 = 1.53 mΩ under full conduction.
Thermal design is defined by DC RthJC = 0.45 K/W and RthCS = 0.25 K/W (greased flat heatsink), with conduction-angle-dependent ΔRthJC increments - e.g., +0.19 K/W at 60° sinusoidal conduction. It supports 180° half-sine wave operation up to 70 A at TC = 140 °C, and withstands 1000 A IFSM with 100% VRRM reapplied after surge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - Maximum repetitive reverse blocking voltage; defines usable DC bus voltage headroom in rectifier designs. |
| IF(AV) | 70 A - Average forward current at TC = 140 °C; sets continuous power-handling capacity in thermally managed systems. |
| IFSM (50 Hz) | 1200 A - Non-repetitive surge rating; enables reliable operation during line transients or motor startup surges. |
| RthJC | 0.45 K/W - Junction-to-case thermal resistance (DC); determines minimum heatsink requirement for thermal stability. |
| VFM | 1.35 V - Forward voltage drop at Ipk = 220 A, TJ = 25 °C, tp = 400 μs; directly impacts conduction loss and thermal load under pulse conditions. |
| TJ max | +180 °C - Maximum junction temperature; allows operation in high-ambient industrial environments without derating. |
| I²t (50 Hz) | 7100 A²s - Fusing energy rating; used to coordinate upstream fuse selection for short-circuit protection. |
Pinout & Package
VS-70HFR80 uses the DO-5 (DO-203AB) stud-mount package with reverse polarity: anode connected to the threaded stud, cathode accessible via insulated lead or mounting surface contact depending on heatsink isolation. Mechanical interface conforms to 1/4"-28UNF-2A thread (or M6×1 option), with maximum mounting torque of 3.2 N·m (28 lbf·in) for lubricated hexagon tightening.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Stud (threaded base) | Anode | Primary high-current input terminal; requires electrically isolated mounting when cathode is grounded. |
| Lead wire / insulated terminal | Cathode | Output terminal; must be routed with adequate creepage/clearance for 800 V reverse blocking. |
Key Features
| Feature | Design Value |
|---|---|
| Stud-anode reverse polarity | Enables direct mounting to grounded heatsinks while keeping anode at system input potential - simplifies high-side rectifier layout. |
| High surge robustness (1200 A, 50 Hz) | Supports repeated line-frequency overloads without degradation, critical for battery charger inrush and welding supply duty cycles. |
| Low RthJC (0.45 K/W) | Reduces thermal bottleneck between junction and heatsink, allowing smaller heatsinks or higher ambient operation in space-constrained enclosures. |
| Extended TJ range (−65 to +180 °C) | Validates use in uncontrolled industrial environments (e.g., factory floors, outdoor power cabinets) without active cooling. |
| Standard recovery (non-fast, non-soft) | Optimized for 50/60 Hz line-frequency rectification - lower cost and higher surge tolerance than fast recovery alternatives. |
Applications
| Battery Chargers | Machine Tool Controls |
|---|---|
Use Scenario: High-current AC-to-DC conversion for industrial lead-acid or lithium-ion battery charging systems operating at 400–600 V DC bus. IC Role / Device Role / Timing Role: Main rectifier element in single-phase or three-phase center-tap or bridge configurations. Use Value: 70 A IF(AV) and 1200 A IFSM ensure uninterrupted charging during grid voltage sags or load surges without thermal runaway. |
Use Scenario: DC power supply for servo drives, CNC controllers, and hydraulic valve banks requiring stable 24–48 V or 110–220 V DC rails. IC Role / Device Role / Timing Role: Input rectifier in unregulated linear or SCR-controlled supplies feeding large capacitor banks. Use Value: +180 °C TJ max and 0.45 K/W RthJC allow continuous operation in sealed control cabinets with ambient temperatures up to 70 °C. |
| Industrial Power Supplies | Converter Systems |
Use Scenario: Bulk rectification stage in 3 kW+ industrial SMPS or phase-controlled thyristor supplies powering electroplating or electrolysis cells. IC Role / Device Role / Timing Role: Primary AC-input diode in half-wave or full-wave configurations handling high RMS currents. Use Value: 110 A IF(RMS) rating and 7100 A²s I²t support long-duration overload conditions typical in process-critical power systems. |
Use Scenario: Output rectification in medium-power DC-DC converters (e.g., 48 V to 12 V) used in telecom or rail auxiliary power units. IC Role / Device Role / Timing Role: Secondary-side freewheeling or output rectifier in forward or push-pull topologies. Use Value: 800 V VRRM provides sufficient margin against reflected voltage spikes in transformer-isolated converters operating at 400 V input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar standard recovery diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VSKY70HFR80 | Same DO-5 package, identical VRRM (800 V) and IF(AV) (70 A), but rated for TJ max = +150 °C (not +180 °C); RthJC = 0.48 K/W. | Limited to lower ambient or forced-cooled applications; unsuitable for sealed enclosures above 60 °C ambient. | Select only if thermal margin exists and +180 °C operation is not required. |
| IXYS DSEI70-08A | Fast recovery (trr ≈ 50 ns), TO-247 package, 800 V VRRM, 70 A IF(AV); RthJC = 0.55 K/W; no stud mount. | Designed for high-frequency switching (kHz range); introduces EMI concerns in line-frequency use and lacks mechanical stud interface. | Choose only for high-frequency PFC or inverter outputs - not for direct VS-70HFR80 replacement in rectifier stacks. |
Compared with VSKY70HFR80 and IXYS DSEI70-08A, the VS-70HFR80 uniquely combines stud-mount mechanical integration, +180 °C junction rating, and standard recovery characteristics - making it irreplaceable in thermally demanding, line-frequency industrial rectifiers where mounting rigidity and thermal resilience are primary constraints.
Availability
VS-70HFR80 is available at Aetrix Electronics and suitable for industrial power supplies, battery chargers, and machine tool controls requiring stable component supply, long-lifecycle support, and traceable sourcing for production programs.
Supply support for VS-70HFR80 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 was engineered for ruggedized line-frequency rectification in harsh environments - emphasizing surge robustness, wide temperature operation, and mechanical durability in stud-mount form factors.
FAQ
What is the maximum case temperature for continuous operation of the VS-70HFR80?
The VS-70HFR80 supports continuous operation at a maximum case temperature (TC) of 140 °C when delivering its rated 70 A average forward current. This rating assumes DC or 180° conduction with proper heatsinking and is validated per Vishay Document #93521. Exceeding TC = 140 °C requires proportional current derating per the conduction-angle curves in Figures 1–4.
Does the VS-70HFR80 have a fast or standard recovery characteristic?
The VS-70HFR80 is a standard recovery diode - not fast or ultrafast - optimized for 50/60 Hz line-frequency rectification. Its recovery behavior is characterized by higher stored charge and longer reverse recovery time compared to fast recovery devices, which enhances surge robustness and reduces cost. This makes VS-70HFR80 ideal for industrial converters where switching frequency is low and EMI sensitivity is minimal.
What does the "R" suffix in VS-70HFR80 signify?
The "R" in VS-70HFR80 denotes reverse polarity: the anode is electrically connected to the threaded stud, while the cathode is brought out via the insulated lead. This configuration allows direct mounting to a grounded heatsink while maintaining the anode at the high-voltage AC input potential - a key advantage in high-side rectifier layouts and transformerless designs.
Can the VS-70HFR80 be mounted directly to a heatsink without insulation?
No - because the VS-70HFR80 has anode-to-stud polarity, direct mounting to a grounded heatsink electrically connects the anode to ground. If the circuit requires cathode grounding or floating anode, electrical isolation (e.g., mica washer + thermal grease) is mandatory. Mounting torque must be controlled: 3.2 N·m (28 lbf·in) for lubricated hexagon tightening per Vishay specification.
What is the I²t rating of the VS-70HFR80 and how is it used in fuse coordination?
The VS-70HFR80 has an I²t rating of 7100 A²s at 50 Hz (10 ms surge). This value represents the fusing energy threshold and is used to select upstream current-limiting fuses that clear faults before the diode fails. For coordination, the fuse's pre-arcing I²t must be less than 7100 A²s, with margin for tolerance and aging - ensuring the fuse interrupts fault current before the diode's junction melts.
VS-70HFR80 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, Reverse Polarity
- 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 ~ 180°C
VS-70HFR80 FAQ
1.How can I place an order for VS-70HFR80 through Aetrix?
Please submit a Request for Quotation (RFQ) for VS-70HFR80 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-70HFR80 reliable?
The price and inventory of VS-70HFR80 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VS-70HFR80 is usually 5 days.
3.What payment methods are accepted for VS-70HFR80?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VS-70HFR80 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VS-70HFR80?
VS-70HFR80 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VS-70HFR80 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-70HFR80?
For technical support, including VS-70HFR80 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VS-70HFR80 requirements.
6.How does Aetrix verify that VS-70HFR80 is sourced from the original manufacturer or authorized distributors?
All VS-70HFR80 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-70HFR80 meets industry standards.
7.What is the process for return or replacement of VS-70HFR80?
All VS-70HFR80 units undergo pre-shipment inspection (PSI). If there is an issue with VS-70HFR80, 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-70HFR80 part is unused and in its original packaging.
Return procedure for VS-70HFR80:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VS-70HFR80 Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
