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Vishay General Semiconductor - Diodes Division 1N6279A-E3/51
- Part No.:
- 1N6279A-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1N6279A-E3/51.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,897
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Product details
Overview
1N6279A-E3/51 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 22 V breakdown voltage (VBR = 20.9–23.1 V at 1 mA), 1500 W peak pulse power (10/1000 µs), 30.6 V clamping voltage at 49 A, 18.8 V stand-off voltage, and 1.0 µA max reverse leakage at VWM, used to safeguard MOSFETs, ICs, and sensor interfaces against inductive switching transients and ESD.
For engineers reviewing the 1N6279A-E3/51 datasheet, 1N6279A-E3/51 pinout, 1N6279A-E3/51 application, or 1N6279A-E3/51 equivalent, this part delivers verified transient suppression performance in commercial-grade 1.5KE axial package designs requiring robust 1500 W surge handling, fast sub-nanosecond response, and stable clamping under repetitive 0.01% duty cycle conditions.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds its 20.9–23.1 V breakdown threshold, it avalanches into low-impedance conduction to divert surge current away from downstream circuitry. Its glass-passivated junction ensures stable VBR tolerance and low incremental surge resistance.
It is rated for 1500 W peak pulse power with 10/1000 µs waveform, supports 200 A non-repetitive forward surge (8.3 ms half-sine), and maintains operation across -55 °C to +175 °C junction temperature range - enabling use in industrial power supplies and automotive body electronics where thermal reliability is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1.0 mA - defines precise avalanche initiation window for predictable clamping onset |
| VWM | 18.8 V - maximum continuous working voltage before leakage rises above 1.0 µA |
| VC @ IPPM | 30.6 V at 49 A - clamping voltage during full 1500 W surge, limiting protected node stress |
| PPPM | 1500 W - peak transient power dissipation capability with 10/1000 µs waveform |
| IFSM | 200 A - non-repetitive forward surge rating (8.3 ms half-sine), critical for inrush/switching events |
| TJ max | +175 °C - high-temperature junction rating enables deployment in enclosed or thermally stressed environments |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, informs heatsinking requirements for sustained duty |
Pinout & Package
Package: Axial leaded DO-201AD (Case Style 1.5KE), molded epoxy body with matte tin-plated leads; cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction or clamping | Connected to lower-potential side of protected line (e.g., ground or return path) |
| Cathode | Current exit point during clamping; marked with band | Connected to higher-potential side (e.g., VIN, signal line) to enable reverse-biased avalanche protection |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| 1500 W peak pulse power (10/1000 µs) | Handles high-energy transients from relay switching, motor commutation, or lightning-induced surges |
| Sub-nanosecond response time | Clamps within ~1 ns, protecting sensitive CMOS inputs before damage occurs |
| Low incremental surge resistance | Minimizes voltage overshoot during high-current transients, improving clamping precision |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance and J-STD-002 solderability standards |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O against voltage spikes from brushed DC motor commutation and solenoid coil de-energization. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed across motor supply rail or driver output to limit transient excursions to ≤30.6 V. Use Value: Prevents latch-up or oxide breakdown in 3.3 V/5 V logic interfaces while sustaining 200 A surge events per JEDEC standard. | Use Scenario: Safeguarding LIN bus transceivers and sensor signal lines (e.g., ambient temperature, door position) from load dump and jump-start transients. IC Role / Device Role / Timing Role: Standoff-connected TVS on 12 V supply rail and bidirectional data lines to suppress ±100 V/50 ms load dump per ISO 7637-2. Use Value: Maintains 18.8 V working margin below typical 13.5 V nominal battery, enabling reliable operation without false triggering. |
| Telecom Power Supply Inputs | Consumer Appliance Control Boards |
Use Scenario: Input-stage protection for AC/DC adapters and PoE-powered equipment exposed to induced surges on long input cables. IC Role / Device Role / Timing Role: Primary clamping device upstream of bulk capacitor and controller IC, sized for 1500 W single-event immunity. Use Value: Limits input rail overshoot to 30.6 V during 10/1000 µs surges, preserving upstream rectifier and downstream PWM controller integrity. | Use Scenario: Overvoltage protection for MCU reset lines, button inputs, and display backlight drivers in washing machines and HVAC controllers. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 µA) shunt suppressor on 3.3 V or 5 V rails, activated only during >20.9 V transients. Use Value: Eliminates need for series resistors or RC filters while maintaining <1 µA standby current drain - critical for battery-backed functions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ22A | Same 22 V VBR range and 1500 W rating, but in SMA surface-mount package (vs. axial 1.5KE) | Requires PCB re-layout; better suited for automated SMT assembly and space-constrained designs | Select when board real estate is limited and wave/solder-reflow compatibility is required |
| ON Semiconductor 1.5KE22A | Identical electrical specs and DO-201AD package; same 1N6279A-E3/51 functional replacement with alternate branding | No change in circuit design, layout, or thermal management; fully interchangeable in legacy axial builds | Choose for dual-sourcing flexibility without qualification retesting |
Compared with 1N6279A-E3/51, SMAJ22A offers SMT integration at the cost of manual rework compatibility, while 1.5KE22A provides identical axial form-factor redundancy - making the latter ideal for drop-in continuity in existing through-hole production lines.
Availability
1N6279A-E3/51 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supply inputs requiring stable component supply, RoHS compliance, and AEC-Q101-qualified alternatives upon request.
Supply support for 1N6279A-E3/51 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 General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability, power handling, and automotive qualification.
The 1N6279A-E3/51 belongs to Vishay's TRANSZORB® 1.5KE family - engineered for high-energy transient suppression in harsh environments where consistent clamping, thermal stability, and long-life performance are mandatory.
FAQ
What is the breakdown voltage range of the 1N6279A-E3/51?
The 1N6279A-E3/51 has a guaranteed breakdown voltage (VBR) range of 20.9 V to 23.1 V at a test current of 1.0 mA, measured per JEDEC standard. This tight tolerance ensures predictable clamping behavior in overvoltage protection circuits and allows designers to set precise safety margins relative to system operating voltage. The 1N6279A-E3/51 achieves this specification using a glass-passivated silicon junction for long-term stability.
How does the 1N6279A-E3/51 differ from bidirectional TVS diodes like 1N6279CA?
The 1N6279A-E3/51 is unidirectional and functions as a polarity-sensitive clamp - it conducts only when cathode voltage exceeds anode by ≥20.9 V, making it ideal for DC rail protection. In contrast, 1N6279CA is bidirectional and clamps symmetrically in both directions, suited for AC lines or differential signals. The 1N6279A-E3/51 exhibits lower leakage (<1.0 µA at 18.8 V) and higher surge current capability in its designated direction versus the bidirectional variant's split ratings.
Can the 1N6279A-E3/51 be used in automotive applications?
Yes - the 1N6279A-E3/51 meets commercial-grade specifications and is compatible with automotive subsystems such as body control modules and infotainment power supplies. For AEC-Q101-qualified versions, Vishay offers the 1.5KE22AHE3_B variant (same electrical specs, qualified per AEC-Q101). The 1N6279A-E3/51 itself operates reliably from -55 °C to +175 °C and withstands 200 A surge events, satisfying key environmental and stress requirements in non-safety-critical automotive domains.
What is the clamping voltage of the 1N6279A-E3/51 at its rated peak pulse current?
At its peak pulse current (IPPM) of 49 A - corresponding to the full 1500 W rating with a 10/1000 µs waveform - the 1N6279A-E3/51 clamps to a maximum of 30.6 V. This value is measured per standardized test conditions and represents the upper voltage limit imposed on protected circuitry during worst-case surge events, directly enabling safe interface with 3.3 V or 5 V logic components when properly applied.
Is the 1N6279A-E3/51 RoHS compliant and lead-free?
Yes - the "E3" suffix in 1N6279A-E3/51 denotes full RoHS compliance per Directive 2011/65/EU, including lead-free matte tin plating on leads that meets J-STD-002 and JESD 22-B102 solderability standards. It also passes JESD 201 Class 1A whisker testing, ensuring mechanical reliability in high-vibration or thermal-cycling environments where tin whisker growth could cause shorts.
1N6279A-E3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 18.8V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.6V
- Current - Peak Pulse (10/1000µs):
- 49A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1N6279A-E3/51 FAQ
1.How can I place an order for 1N6279A-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6279A-E3/51 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 1N6279A-E3/51 reliable?
The price and inventory of 1N6279A-E3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6279A-E3/51 is usually 5 days.
3.What payment methods are accepted for 1N6279A-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6279A-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6279A-E3/51?
1N6279A-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6279A-E3/51 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 1N6279A-E3/51?
For technical support, including 1N6279A-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6279A-E3/51 requirements.
6.How does Aetrix verify that 1N6279A-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1N6279A-E3/51 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 1N6279A-E3/51 meets industry standards.
7.What is the process for return or replacement of 1N6279A-E3/51?
All 1N6279A-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6279A-E3/51, 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 1N6279A-E3/51 part is unused and in its original packaging.
Return procedure for 1N6279A-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6279A-E3/51 Tags
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