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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Vishay General Semiconductor - Diodes Division VS-72HFR120

Name: VS-72HFR120
Brand: Vishay General Semiconductor - Diodes Division
SKU: VS-72HFR120
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: VS-72HFR120

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Single Diodes

Package:: DO-203AB, DO-5, Stud

Datasheet:: VS-72HFR120.pdf

Description:: DIODE GP REV 1.2KV 70A DO203AB

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Product details

Overview

VS-72HFR120 from Vishay Semiconductors is a standard recovery stud-mount diode with reverse polarity (anode-to-stud), rated for 1200 V repetitive peak reverse voltage (V_RRM), 70 A average forward current (I_F(AV)), and 1250 A non-repetitive surge current at 60 Hz. It uses a DO-5 (DO-203AB) metal stud package and is designed for high-reliability industrial power conversion in battery chargers and machine tool controls.

For engineers reviewing the VS-72HFR120 datasheet, VS-72HFR120 pinout, VS-72HFR120 application, or VS-72HFR120 equivalent, this page delivers verified electrical ratings, thermal resistance data (R_thJC = 0.45 K/W), forward voltage characteristics (V_FM = 1.46 V @ 220 A), and real-world mounting torque specifications (3.2 N·m lubricated hexagon).

Technical Context

This diode operates as a unidirectional power rectifier in line-frequency AC/DC conversion circuits. Its standard recovery behavior (t_rr not specified but implied by "standard recovery" classification) supports 50/60 Hz operation with conduction-angle-dependent derating - e.g., I_F(AV) drops from 70 A at 180° to 40 A at 60° sinusoidal conduction.

Thermal design relies on direct stud-to-heatsink interface: R_thJC = 0.45 K/W (DC), R_thCS = 0.25 K/W (greased flat surface), and maximum junction temperature of +180 °C. Mounting torque is defined per thread type: 3.2 N·m for lubricated M6 hexagon tightening.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	1200 V - blocks up to 1200 V repetitive reverse voltage without breakdown; matches 1000 V AC input rectification with safety margin
I_F(AV)	70 A - maximum average forward current at 140 °C case temperature under 180° half-sine conduction
I_FSM	1250 A - peak non-repetitive surge current capability at 60 Hz, t = 8.3 ms, enabling robust short-circuit withstand
V_FM	1.46 V - forward voltage drop at 220 A, 25 °C, 400 μs pulse; determines conduction loss in high-current switching cycles
R_thJC	0.45 K/W - junction-to-case thermal resistance under DC operation; defines minimum heatsink requirement for thermal management
T_J max	+180 °C - maximum junction temperature rating; enables operation in high-ambient industrial environments
Package	DO-5 (DO-203AB) - stud-mount metal case with M6 x 1 thread; requires mechanical clamping to heatsink for thermal and electrical contact

Pinout & Package

VS-72HFR120 uses a two-terminal stud-mount configuration in DO-5 (DO-203AB) metal package. The "R" suffix denotes reverse polarity: anode is connected to the stud (mounting surface), cathode is the isolated lead with silicone sleeve (blue insulation). No PCB footprint - mounted directly to heatsink via threaded stud.

Pin/Terminal	Circuit Role	Design Meaning
Stud (M6 x 1)	Anode	Electrically and thermally connected to internal die anode; must be bolted to heatsink with specified torque (3.2 N·m lubricated)
Isolated Lead (Blue Sleeve)	Cathode	Insulated wire termination; provides electrical isolation from heatsink; rated for 1200 V standoff

Key Features

Feature	Design Value
High surge current capability	1250 A I_FSM at 60 Hz enables reliable operation during motor startup or transformer inrush events
Stud anode (reverse polarity)	Anode-to-stud configuration simplifies heatsinking in grounded-cathode topologies (e.g., negative-output supplies)
Isolated cathode lead with silicone sleeve	Blue-insulated lead provides 1200 V isolation and mechanical protection; eliminates need for external insulation bushings
Industrial qualification	Rated for -65 °C to +180 °C operation and qualified per industrial-level reliability standards
Low thermal resistance	R_thJC = 0.45 K/W ensures efficient heat transfer from junction to heatsink, reducing thermal stress under continuous load

Applications

Battery Chargers	Machine Tool Controls
Use Scenario: Three-phase rectification in industrial battery charging systems for forklifts and energy storage. IC Role / Device Role / Timing Role: Power rectifier converting 400–690 VAC line input to DC bus; handles 70 A continuous and 1250 A surge during charge initiation. Use Value: 1200 V V_RRM accommodates 690 VAC + transients; 0.45 K/W R_thJC sustains efficiency at 140 °C case temperature.	Use Scenario: DC link rectification in CNC machine spindle drives and servo amplifier front-ends. IC Role / Device Role / Timing Role: Main AC/DC converter supplying regulated DC to IGBT gate drivers and control logic; operates at 50/60 Hz with intermittent overload. Use Value: Reverse polarity (anode-to-stud) allows direct mounting to grounded chassis; isolated blue lead prevents shorting in dense control cabinets.
Industrial Power Supplies	Welding Equipment
Use Scenario: High-current output stage in programmable DC power supplies for test benches and plating lines. IC Role / Device Role / Timing Role: Output rectifier delivering stable 70 A DC with low forward drop (V_FM = 1.46 V) to minimize conduction loss and thermal rise. Use Value: 1.46 V V_FM at 220 A reduces power dissipation vs. higher-V_F alternatives; DO-5 package enables direct bolt-down cooling.	Use Scenario: Primary rectification in resistance welding controllers handling repetitive 1000+ A pulses. IC Role / Device Role / Timing Role: Line-frequency diode conducting high-duty-cycle half-sine currents; withstands repeated I²t stress (6450 A²s at 60 Hz). Use Value: 6450 A²s I²t rating ensures fusing immunity across weld cycle profiles; +180 °C T_J max supports duty-cycle thermal accumulation.

Battery Chargers

Machine Tool Controls

Use Scenario: Three-phase rectification in industrial battery charging systems for forklifts and energy storage.

IC Role / Device Role / Timing Role: Power rectifier converting 400–690 VAC line input to DC bus; handles 70 A continuous and 1250 A surge during charge initiation.

Use Value: 1200 V V_RRM accommodates 690 VAC + transients; 0.45 K/W R_thJC sustains efficiency at 140 °C case temperature.

Use Scenario: DC link rectification in CNC machine spindle drives and servo amplifier front-ends.

IC Role / Device Role / Timing Role: Main AC/DC converter supplying regulated DC to IGBT gate drivers and control logic; operates at 50/60 Hz with intermittent overload.

Use Value: Reverse polarity (anode-to-stud) allows direct mounting to grounded chassis; isolated blue lead prevents shorting in dense control cabinets.

Industrial Power Supplies

Welding Equipment

Use Scenario: High-current output stage in programmable DC power supplies for test benches and plating lines.

IC Role / Device Role / Timing Role: Output rectifier delivering stable 70 A DC with low forward drop (V_FM = 1.46 V) to minimize conduction loss and thermal rise.

Use Value: 1.46 V V_FM at 220 A reduces power dissipation vs. higher-V_F alternatives; DO-5 package enables direct bolt-down cooling.

Use Scenario: Primary rectification in resistance welding controllers handling repetitive 1000+ A pulses.

IC Role / Device Role / Timing Role: Line-frequency diode conducting high-duty-cycle half-sine currents; withstands repeated I²t stress (6450 A²s at 60 Hz).

Use Value: 6450 A²s I²t rating ensures fusing immunity across weld cycle profiles; +180 °C T_J max supports duty-cycle thermal accumulation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar standard recovery diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
VS-72HF120	No "R" suffix → normal polarity (cathode-to-stud); same V_RRM, I_F(AV), and package	Requires insulated mounting hardware when cathode must be isolated from heatsink	Select VS-72HF120 if system topology grounds the cathode side and stud isolation is unnecessary
VS-72HFR140	Higher V_RRM = 1400 V; identical I_F(AV), package, and thermal specs	Suitable for 1000 VAC systems with elevated transient requirements or legacy designs specifying 1400 V margin	Choose VS-72HFR140 only if system overvoltage stress exceeds 1200 V; otherwise, VS-72HFR120 offers optimal cost/performance balance

Compared with VS-72HF120 and VS-72HFR140, VS-72HFR120 uniquely combines 1200 V blocking, anode-to-stud polarity, and isolated blue cathode lead - making it the precise fit for grounded-anode, high-surge industrial rectifiers where mechanical isolation and polarity alignment are critical.

Availability

VS-72HFR120 is available at Aetrix Electronics and suitable for battery chargers, machine tool controls, and industrial power supplies requiring stable component supply, long-term manufacturability, and traceable sourcing from Vishay's qualified production line.

Supply support for VS-72HFR120 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 emphasis on power, signal, and sensing technologies for industrial and automotive markets.

The VS-70HF(R) Series is part of Vishay's industrial-grade standard recovery diode family, engineered for rugged line-frequency rectification in converters, battery chargers, and motor controls where surge robustness and thermal stability are essential.

FAQ

What does the "R" in VS-72HFR120 signify?

The "R" suffix in VS-72HFR120 indicates reverse polarity: the anode is electrically connected to the metal stud, while the cathode is delivered via the isolated blue silicone-sleeved lead. This configuration simplifies thermal and electrical integration in negative-output or grounded-anode power supply designs. VS-72HFR120 must be mounted with the stud contacting the heatsink to maintain both thermal path and circuit reference.

What is the maximum allowable case temperature for VS-72HFR120?

The maximum allowable case temperature for VS-72HFR120 is +140 °C, as specified in the "MAJOR RATINGS AND CHARACTERISTICS" table for the 10–120 V_RRM group (which includes 1200 V). At this temperature, the device sustains its rated 70 A average forward current under 180° conduction. Exceeding +140 °C case temperature requires derating per the conduction-angle curves in Figures 1–4 of the datasheet.

Does VS-72HFR120 have a specified reverse recovery time (t_rr)?

No - VS-72HFR120 is classified as a standard recovery diode in the VS-70HF(R) Series documentation, and no reverse recovery time (t_rr) value is provided in the datasheet. It is intended for 50/60 Hz line-frequency applications, not high-frequency switching. For fast- or ultrafast-recovery alternatives, consult Vishay's VS-70HFx or VS-70UHFx families, which explicitly specify t_rr.

What mounting torque should be applied to the VS-72HFR120 stud?

For VS-72HFR120 with M6 x 1 thread, the recommended mounting torque is 3.2 N·m (28 lbf·in) when using a lubricated thread and tightening on the hexagon. This value ensures reliable thermal contact without damaging the stud or deforming the case. Torque must be applied with calibrated tools; under-torque increases R_thCS, while over-torque risks mechanical failure.

Can VS-72HFR120 be used in parallel configurations?

VS-72HFR120 is not characterized for forced current sharing in parallel operation. Its forward voltage (V_F) has inherent unit-to-unit variation, and no matching or balancing resistors are specified. Parallel use is discouraged unless externally managed via individual series inductors or active current balancing - and even then, derating and thermal monitoring are mandatory. For higher current needs, select a higher-rated single device or verify parallel feasibility with Vishay's application engineering team.

VS-72HFR120 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):: 1200 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:: -

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-72HFR120 FAQ

1.How can I place an order for VS-72HFR120 through Aetrix?

Please submit a Request for Quotation (RFQ) for VS-72HFR120 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-72HFR120 reliable?

The price and inventory of VS-72HFR120 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VS-72HFR120 is usually 5 days.

3.What payment methods are accepted for VS-72HFR120?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VS-72HFR120 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for VS-72HFR120?

VS-72HFR120 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your VS-72HFR120 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-72HFR120?

For technical support, including VS-72HFR120 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VS-72HFR120 requirements.

6.How does Aetrix verify that VS-72HFR120 is sourced from the original manufacturer or authorized distributors?

All VS-72HFR120 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-72HFR120 meets industry standards.

7.What is the process for return or replacement of VS-72HFR120?

All VS-72HFR120 units undergo pre-shipment inspection (PSI). If there is an issue with VS-72HFR120, 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-72HFR120 part is unused and in its original packaging.

Return procedure for VS-72HFR120:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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