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Vishay General Semiconductor - Diodes Division VS-1N2128RA
- Part No.:
- VS-1N2128RA
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Diodes
- Package:
- DO-203AB, DO-5, Stud
- Datasheet:
-
VS-1N2128RA.pdf
- Description:
- DIODE GEN PURP 50V 60A DO203AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,939
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Product details
Overview
VS-1N2128RA from Vishay Semiconductors is a stud-mount silicon rectifier diode configured as a single anode-to-case polarity device in DO-5 (DO-203AB) package, rated for 60 A average forward current at 140 °C case temperature, 600 V maximum repetitive peak reverse voltage, and 900 A peak non-repetitive surge current at 60 Hz - used in high-power industrial AC/DC conversion stages.
For engineers reviewing the VS-1N2128RA datasheet, VS-1N2128RA pinout, VS-1N2128RA application, or VS-1N2128RA equivalent, key selection criteria include its anode-to-case thermal path, 0.65 °C/W junction-to-case thermal resistance, low 1.3 V forward voltage at rated current, and compatibility with holed threaded heatsinks per JEDEC DO-5 mechanical standard.
Technical Context
This diode operates as a unidirectional power rectifier in line-frequency (50/60 Hz) applications, with conduction limited to half-wave or full-wave bridge configurations. Its 600 V VRRM rating supports use in 400 V AC input systems with safety margin, and its 140 °C maximum case temperature enables operation in high-ambient industrial enclosures without forced cooling.
The device features low leakage current and high I2t fusing capability (3400 A2s at 8.3 ms), enabling robust short-circuit withstand in motor drive DC bus protection and welder primary rectification. Its stud-mount construction provides direct thermal coupling to heatsinks via 3.4 N·m mounting torque specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 600 V - supports 400 V AC RMS input with 1.5× safety margin in industrial rectifiers |
| IF(AV) | 60 A at TC = 140 °C - delivers continuous DC output current in high-power supplies |
| IFSM | 900 A at 60 Hz - withstands inrush surges in transformer-fed rectifier circuits |
| VFM | 1.3 V at IF = 110 A, TJ = 25 °C - minimizes conduction loss in high-current paths |
| RthJC | 0.65 °C/W - enables efficient heat transfer from junction to heatsink in stud-mount configuration |
| TJ Range | -65 °C to +200 °C - supports operation in extreme ambient environments including oil-filled or sealed enclosures |
| I2t (8.3 ms) | 3400 A2s - defines fusing time under short-circuit conditions for protection coordination |
Pinout & Package
VS-1N2128RA uses a two-terminal stud-mount DO-5 (DO-203AB) package: the metal case serves as the anode terminal, and the central stud thread is electrically isolated and mechanically grounded to the heatsink. Mounting requires 3.4 N·m torque on non-lubricated threads per JEDEC specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Case (Stud Base) | Anode | Primary current-carrying terminal; electrically connected to internal die anode; requires insulated mounting hardware when cathode-side grounding is needed |
| Central Stud Thread | Mechanical Interface / Thermal Path | Non-electrical mechanical interface; provides direct thermal conduction path to heatsink; must be torqued to 3.4 N·m (30 lbf·in) for optimal RthCS |
| Cathode Lead (Wire) | Cathode | Flexible tinned copper wire lead exiting top of package; terminates to PCB or busbar; polarity marked by band on body |
Key Features
| Feature | Design Value |
|---|---|
| Anode-to-case polarity | Enables direct mounting to grounded heatsinks without isolation washers in cathode-referenced systems |
| Low VFM (1.3 V) | Reduces forward conduction loss by ~25% vs. legacy 1.7 V diodes at 110 A, improving system efficiency |
| High IFSM (900 A) | Supports reliable operation during repeated transformer inrush events in welding equipment and UPS systems |
| JEDEC DO-5 mechanical standard | Ensures interchangeability with legacy stud-mount rectifiers and compatibility with standard holed-thread heatsinks |
| 0.65 °C/W RthJC | Allows higher sustained current density than 1.0 °C/W predecessors, reducing heatsink size requirements |
Applications
| Industrial Motor Drive Rectification | Welder Primary-Side Rectification |
|---|---|
|
Use Scenario: Converting 3-phase 400 V AC mains to DC bus in variable frequency drives for pumps and compressors. IC Role / Device Role / Timing Role: Power rectifier in six-pulse diode bridge; handles continuous 60 A average current with 900 A surge tolerance. Use Value: Low 1.3 V forward drop reduces conduction losses by 0.3 W/A over 1.6 V alternatives, lowering heatsink thermal load. |
Use Scenario: Rectifying transformer secondary output in resistance spot welders with high-duty-cycle pulsed loads. IC Role / Device Role / Timing Role: Anode-to-case stud diode mounted directly to water-cooled heatsink; absorbs 900 A surge pulses at 60 Hz. Use Value: 3400 A²s I²t rating enables coordination with fast-acting fuses without nuisance blowing during weld pulses. |
| Uninterruptible Power Supply (UPS) Input Stage | High-Power DC Power Supply for Electroplating |
|
Use Scenario: AC/DC front-end rectification in 10–20 kVA online UPS systems with battery backup and double-conversion topology. IC Role / Device Role / Timing Role: Single-phase or three-phase bridge rectifier; operates continuously at 60 A with 140 °C case temperature limit. Use Value: -65 °C to +200 °C junction range ensures reliability during extended battery discharge cycles causing elevated ambient temperatures. |
Use Scenario: High-current DC supply delivering 500–1000 A at 6–12 V for industrial electroplating tanks. IC Role / Device Role / Timing Role: Parallel-connected stud diodes in multi-phase rectifier banks; each VS-1N2128RA handles 60 A segment. Use Value: DO-5 stud mount allows direct bolt-down to copper busbars, minimizing parasitic inductance and contact resistance in high-current paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VS-1N2138RA | Same DO-5 package, 600 V VRRM, but rated for 40 A IF(AV) at 150 °C - lower current, higher temp rating | Better suited for space-constrained designs where thermal margin exceeds current demand | Select VS-1N2138RA only if average current ≤ 40 A and case temperature may exceed 140 °C |
| VS-1N3768R | 1000 V VRRM, 40 A IF(AV), same DO-5 package - higher voltage, lower current rating | Required for 690 V AC industrial systems or applications needing >2× safety margin over 400 V AC | Choose VS-1N3768R when VRRM > 600 V is mandated, accepting reduced current capacity |
Compared with VS-1N2128RA, VS-1N2138RA trades 20 A current capacity for +10 °C case temperature headroom, while VS-1N3768R doubles reverse voltage rating at the cost of 33 % lower average current - neither is pin-compatible due to differing thermal derating curves and surge profiles.
Availability
VS-1N2128RA is available at Aetrix Electronics and suitable for industrial motor drives, welder power supplies, uninterruptible power systems, and electroplating rectifiers requiring stable component supply across long production lifecycles.
Supply support for VS-1N2128RA 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, optoelectronic, and sensing components for industrial, automotive, and computing markets.
The VS-1N2128RA belongs to Vishay's stud-mount silicon rectifier family designed specifically for high-current, high-temperature industrial power conversion - emphasizing thermal robustness, surge resilience, and mechanical interchangeability in harsh environments.
FAQ
What is the polarity configuration of VS-1N2128RA?
The VS-1N2128RA is an anode-to-case device: the metal case serves as the anode terminal, and the wire lead is the cathode. This configuration allows direct mounting to grounded heatsinks in cathode-referenced systems, eliminating the need for insulating hardware unless system grounding topology requires isolation.
What is the maximum allowable case temperature for VS-1N2128RA at full 60 A load?
The VS-1N2128RA is rated for 60 A average forward current at a maximum case temperature of 140 °C, as specified in the "MAJOR RATINGS AND CHARACTERISTICS" table. Operation above this temperature requires derating per Figure 12 in the datasheet, which shows allowable current reduction as case temperature increases beyond 140 °C.
Does VS-1N2128RA have a documented I²t rating for fuse coordination?
Yes, VS-1N2128RA has a documented I²t rating of 3400 A²s at 8.3 ms (60 Hz) with rated VRRM applied post-surge. This value is explicitly listed in the "MAJOR RATINGS AND CHARACTERISTICS" table and is used for time-current coordination with fast-acting fuses in industrial rectifier protection schemes.
Can VS-1N2128RA be mounted directly to a heatsink without thermal interface material?
No - although the VS-1N2128RA stud mount is designed for direct thermal contact, Vishay specifies a thermal resistance from case to sink (RthCS) of 0.25 °C/W assuming a smooth, flat, and greased mounting surface. Omitting thermal grease increases RthCS, risking excessive junction temperature and premature failure under rated load.
How does the forward voltage of VS-1N2128RA compare to earlier 1N1183-series diodes?
VS-1N2128RA has a maximum forward voltage of 1.3 V at 110 A and 25 °C, compared to 1.7 V for the VS-1N1183 series. This 0.4 V reduction lowers conduction losses by approximately 44 W at 110 A, significantly reducing thermal stress and improving system efficiency in high-current applications.
VS-1N2128RA 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):
- 50 V
- Current - Average Rectified (Io):
- 60A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 188 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 10 mA @ 50 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis, Stud Mount
- Supplier Device Package:
- DO-203AB (DO-5)
- Operating Temperature - Junction:
- -65°C ~ 200°C
VS-1N2128RA FAQ
1.How can I place an order for VS-1N2128RA through Aetrix?
Please submit a Request for Quotation (RFQ) for VS-1N2128RA 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-1N2128RA reliable?
The price and inventory of VS-1N2128RA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VS-1N2128RA is usually 5 days.
3.What payment methods are accepted for VS-1N2128RA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VS-1N2128RA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VS-1N2128RA?
VS-1N2128RA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VS-1N2128RA 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-1N2128RA?
For technical support, including VS-1N2128RA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VS-1N2128RA requirements.
6.How does Aetrix verify that VS-1N2128RA is sourced from the original manufacturer or authorized distributors?
All VS-1N2128RA 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-1N2128RA meets industry standards.
7.What is the process for return or replacement of VS-1N2128RA?
All VS-1N2128RA units undergo pre-shipment inspection (PSI). If there is an issue with VS-1N2128RA, 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-1N2128RA part is unused and in its original packaging.
Return procedure for VS-1N2128RA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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