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Vishay General Semiconductor - Diodes Division VS-1N2129A
- Part No.:
- VS-1N2129A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Diodes
- Package:
- DO-203AB, DO-5, Stud
- Datasheet:
-
VS-1N2129A.pdf
- Description:
- DIODE GEN PURP 100V 60A DO203AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,759
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Product details
Overview
VS-1N2129A from Vishay Semiconductors is a stud-mount silicon power rectifier diode rated for 100 V repetitive peak reverse voltage (VRRM), 40 A average forward current (IF(AV)) at 150 °C case temperature, and 800 A non-repetitive surge current (IFSM, 60 Hz). It features low forward voltage drop (1.3 V at rated IF), low leakage current, and DO-5 (DO-203AB) metal stud package with threaded mounting for high-power industrial AC/DC conversion.
For engineers reviewing the VS-1N2129A datasheet, VS-1N2129A pinout, VS-1N2129A application, or VS-1N2129A equivalent, key selection criteria include its 100 V VRRM, 40 A thermal derating profile, stud-mount mechanical interface, I2t fusing capability of 2650 A²s (8.3 ms), and compatibility with holed threaded heatsinks per JEDEC DO-5 specification.
Technical Context
This device operates as a single-element, unidirectional power rectifier in high-current, high-temperature environments. Its junction-to-case thermal resistance is 0.65 °C/W, enabling efficient heat transfer to externally mounted heatsinks via the threaded stud terminal. The diode supports 1-phase, 180° sinusoidal conduction and is rated for continuous operation from –65 °C to +200 °C storage and –65 °C to +190 °C operating case temperature.
It delivers stable forward conduction with VFM = 1.3 V at 110 A peak forward current (TJ = 25 °C), and maintains low reverse leakage - ≤2.5 mA at rated IF(AV), VRRM, and TC. Surge robustness is confirmed by 800 A half-cycle 60 Hz IFSM and 2650 A²s I2t rating under rated VRRM post-surge conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V maximum repetitive peak reverse voltage - defines safe blocking capability in AC line rectification up to 100 V RMS applications. |
| IF(AV) | 40 A average forward current at TC = 150 °C - specifies continuous DC output current when thermally managed on a heatsink. |
| IFSM (60 Hz) | 800 A non-repetitive surge current - supports motor-start transients and short-circuit fault energy absorption without failure. |
| I2t (8.3 ms) | 2650 A²s - quantifies fusing energy threshold; used for coordination with upstream overcurrent protection devices. |
| VFM | 1.3 V at IF = 110 A, TJ = 25 °C - determines conduction loss and thermal load in high-current bridge or center-tap rectifier designs. |
| RthJC | 0.65 °C/W - enables precise junction temperature estimation when heatsink thermal resistance is known. |
| TC Range | –65 °C to +190 °C - validates suitability for under-hood automotive, industrial welders, and high-temp power supplies. |
Pinout & Package
The VS-1N2129A uses a DO-5 (DO-203AB) stud-mount metal package with a threaded M6 × 0.75 (1/4"-28 UNF-2A) cathode terminal and insulated anode case. Mounting torque is 3.4 N·m (30 lbf·in) for non-lubricated threads tightening on nut.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode Stud | Output terminal (cathode connection) | Threaded metal stud serves as both electrical contact and mechanical mounting point; requires conductive thermal interface to heatsink. |
| Anode Case | Input terminal (anode connection) | Insulated metal case provides anode connection via screw terminal or clamped busbar; electrically isolated from heatsink unless specified. |
Key Features
| Feature | Design Value |
|---|---|
| Low leakage current series | ≤2.5 mA IR(AV) at full rating - reduces standby power loss and improves reliability in high-impedance hold-up circuits. |
| High surge current capability | 800 A IFSM (60 Hz) - withstands repeated inrush events in transformer-fed power supplies without degradation. |
| JEDEC DO-5 stud package | M6 × 0.75 threaded cathode stud with 0.25 °C/W RthCS (greased surface) - enables direct bolt-down to large-area heatsinks for scalable thermal management. |
| Wide operating temperature range | –65 °C to +190 °C case temperature - supports deployment in aerospace, oil & gas, and industrial motor drive environments. |
| Low forward voltage | 1.3 V VFM at 110 A - lowers conduction losses by ~20% vs. legacy 1.7 V diodes, improving efficiency in 40 A-class rectifiers. |
Applications
| Industrial AC/DC Power Supplies | Welding Equipment Rectifiers |
|---|---|
|
Use Scenario: High-current, air- or liquid-cooled 3-phase rectifier stacks converting 400 VAC line to 500 VDC bus for variable-frequency drives. IC Role / Device Role / Timing Role: Power rectifier element in multi-diode parallel or series string configurations, handling sustained 40 A average load with transient surges. Use Value: 0.65 °C/W RthJC and 150 °C-rated IF(AV) allow compact thermal design; 2650 A²s I2t ensures coordination with fast-acting DC breakers. |
Use Scenario: Primary-side rectification in resonant inverter-based arc welders requiring rapid current turn-on and high short-circuit tolerance. IC Role / Device Role / Timing Role: Main DC link diode conducting pulsed 100–200 A peak currents with 10–50 ms duty cycles. Use Value: 800 A IFSM and 190 °C max TC support intermittent high-stress operation without thermal runaway or parameter drift. |
| Uninterruptible Power Systems (UPS) | High-Voltage Battery Chargers |
|
Use Scenario: Line-commutated rectifier stage in double-conversion UPS systems delivering 40 A continuous DC to inverter section. IC Role / Device Role / Timing Role: Single-diode element in 6-pulse or 12-pulse bridge, operating at 180° conduction with forced-air cooling. Use Value: Low 2.5 mA reverse leakage minimizes self-discharge during battery backup mode; DO-5 stud enables secure mechanical retention in vibration-prone rack-mount enclosures. |
Use Scenario: On-board charger rectification for 48–96 V battery systems in material handling equipment, accepting 230 VAC input. IC Role / Device Role / Timing Role: Output rectifier in high-frequency isolated AC/DC converter, handling 40 A average output current with 100 V blocking requirement. Use Value: 100 V VRRM provides 2× safety margin over 48 V nominal bus; 1.3 V VFM reduces conduction loss and thermal stress in sealed chassis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VS-1N1184A | Same DO-5 package, identical 100 V VRRM, but rated for 35 A IF(AV) at 140 °C TC and lower 765 A IFSM. | Lower thermal capacity limits use in sustained 40 A designs; suitable only where derating to 35 A is acceptable. | Select VS-1N1184A only if system-level thermal margin allows 5 A reduction and surge requirements are ≤765 A. |
| VS-1N2128A | Same family, DO-5 package, but rated for 60 A IF(AV) at 140 °C TC, 900 A IFSM, and 3400 A²s I2t - higher performance variant. | Over-spec'd for 100 V/40 A use cases; introduces unnecessary cost and thermal mass unless future-proofing or redundancy is required. | Choose VS-1N2128A only when design headroom for 50 % higher current or 12.5 % higher surge is explicitly needed. |
Compared with VS-1N1184A, the VS-1N2129A delivers +14 % average current capacity and +4.6 % surge rating at same VRRM; versus VS-1N2128A, it offers optimized cost-performance balance for 40 A applications without over-engineering thermal or surge margins.
Availability
VS-1N2129A is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, welding equipment rectifiers, and uninterruptible power systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for VS-1N2129A 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 demanding industrial, automotive, and military applications.
The VS-1N2129A belongs to Vishay's stud-mount silicon rectifier family designed specifically for high-current, high-temperature power conversion in ruggedized equipment where mechanical robustness and thermal stability are critical.
FAQ
What is the maximum average forward current rating for VS-1N2129A?
The VS-1N2129A is rated for 40 A average forward current (IF(AV)) at a case temperature of 150 °C. This rating assumes 1-phase, 180° sinusoidal conduction and proper heatsinking. At lower case temperatures, the current can be increased per the derating curve in Figure 6 of the datasheet; at 140 °C, it remains 40 A, while at 100 °C it rises to approximately 52 A.
Does VS-1N2129A have a cathode-to-case or anode-to-case configuration?
The VS-1N2129A follows the standard Vishay stud-diode convention: the threaded stud is the cathode terminal, and the insulated metal case is the anode. This matches the "basic type number indicates cathode to case" rule stated in the datasheet. For anode-to-case variants, Vishay adds "R" to the part number (e.g., VS-1N2129AR), which is not the case here.
What is the thermal resistance from junction to case (RthJC) for VS-1N2129A?
The junction-to-case thermal resistance (RthJC) for VS-1N2129A is 0.65 °C/W under DC operation. This value is confirmed in the Thermal and Mechanical Specifications table and applies to the DO-5 package. It enables accurate junction temperature calculation when combined with measured case temperature and power dissipation.
Can VS-1N2129A be used in 60 Hz AC line rectification?
Yes, VS-1N2129A is fully qualified for 60 Hz AC line rectification. Its 800 A non-repetitive surge current rating (IFSM) is explicitly tested at 60 Hz, and its 100 V VRRM provides adequate margin for 120 VAC RMS inputs (peak ≈ 170 V) when used in voltage-doubler or center-tapped configurations with appropriate snubbing.
What is the maximum allowable mounting torque for the VS-1N2129A stud terminal?
The maximum allowable mounting torque for the VS-1N2129A cathode stud is 3.4 N·m (30 lbf·in) when using a non-lubricated thread tightened on the nut. If a lubricated thread is used, the torque must be reduced to 2.3 N·m (20 lbf·in) to avoid overstressing the internal bond. Exceeding these values risks mechanical damage or compromised thermal contact.
VS-1N2129A 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):
- 100 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 @ 100 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-1N2129A FAQ
1.How can I place an order for VS-1N2129A through Aetrix?
Please submit a Request for Quotation (RFQ) for VS-1N2129A 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-1N2129A reliable?
The price and inventory of VS-1N2129A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VS-1N2129A is usually 5 days.
3.What payment methods are accepted for VS-1N2129A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VS-1N2129A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VS-1N2129A?
VS-1N2129A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VS-1N2129A 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-1N2129A?
For technical support, including VS-1N2129A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VS-1N2129A requirements.
6.How does Aetrix verify that VS-1N2129A is sourced from the original manufacturer or authorized distributors?
All VS-1N2129A 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-1N2129A meets industry standards.
7.What is the process for return or replacement of VS-1N2129A?
All VS-1N2129A units undergo pre-shipment inspection (PSI). If there is an issue with VS-1N2129A, 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-1N2129A part is unused and in its original packaging.
Return procedure for VS-1N2129A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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