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Vishay General Semiconductor - Diodes Division 1N6279HE3/54
- Part No.:
- 1N6279HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1N6279HE3/54.pdf
- Description:
- TVS DIODE 17.8VWM 31.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,177
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Product details
Overview
1N6279HE3/54 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), 18.8 V maximum standoff voltage (VWM), 30.6 V clamping voltage (VC) at 49 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs), and operates across –55 °C to +175 °C junction temperature range.
For engineers reviewing the 1N6279HE3/54 datasheet, 1N6279HE3/54 pinout, 1N6279HE3/54 application, or 1N6279HE3/54 equivalent, this device serves as a robust, AEC-Q101-qualified surge protector for automotive power supplies, industrial sensor interfaces, and telecom line cards where fast clamping (<1 ns), low incremental surge resistance, and stable thermal performance are required.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction optimized for high-energy transient suppression. Its clamping behavior is defined by a 10/1000 µs waveform with 0.01% duty cycle, delivering consistent VC = 30.6 V at IPPM = 49 A and maintaining <0.092 %/°C temperature coefficient of VBR.
The device exhibits 6.5 W steady-state power dissipation on infinite heatsink at TL = 75 °C, 75 °C/W junction-to-ambient thermal resistance, and supports 200 A non-repetitive forward surge current (8.3 ms half-sine). Its matte tin-plated leads meet J-STD-002 solderability and JESD 201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at IT = 1 mA - defines precise breakdown threshold for reliable triggering |
| VWM | 18.8 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 30.6 V at 49 A (10/1000 µs) - clamping voltage limiting downstream component stress during surge |
| PPPM | 1500 W - peak transient energy handling capacity without failure |
| IFSM | 200 A (8.3 ms half-sine) - surge current tolerance for short-duration overloads |
| TJ Range | –55 °C to +175 °C - enables deployment in under-hood automotive and industrial environments |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with UL 94 V-0 molded epoxy body |
Pinout & Package
1N6279HE3/54 is housed in a DO-201AD (Case Style 1.5KE) axial-leaded package with cathode indicated by a color band. Leads are matte tin-plated, compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected circuit; conducts during forward surge events |
| Cathode | Reverse-biased clamping terminal | Marked with color band; sinks transient current when reverse voltage exceeds VWM |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR and low leakage (<1 µA at VWM) across temperature and lifetime |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| 1500 W peak pulse power | Withstands lightning-induced surges per IEC 61000-4-5 (Level 4) and ISO 7637-2 (Pulse 5a) |
| Sub-nanosecond response | Clamps transients within ≤1 ns - faster than MOVs or gas discharge tubes, protecting sensitive ICs |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth in high-reliability applications requiring long-term storage or operation |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 24 V CAN bus power inputs against load dump and alternator transients in commercial vehicles. IC Role / Device Role / Timing Role: Primary shunt clamping device placed directly across input rail upstream of DC-DC converters. Use Value: Limits voltage to ≤30.6 V during 1500 W surges, preventing damage to downstream PMICs and microcontrollers rated for 36 V absolute max. |
Use Scenario: Safeguarding 4–20 mA current loop transmitters connected to field wiring exposed to EMI and electrostatic discharge. IC Role / Device Role / Timing Role: Unidirectional TVS mounted at connector entry point to divert induced surges before reaching analog front-end. Use Value: Clamps transients within 1 ns while maintaining <1 µA leakage at 18.8 V, preserving loop accuracy and calibration stability. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Input Stage |
Use Scenario: Secondary overvoltage protection on AC/DC adapter outputs feeding DSL or PON optical modules. IC Role / Device Role / Timing Role: Final-stage TVS after bulk filtering, guarding against capacitor discharge and hot-plug transients. Use Value: Withstands repetitive 10/1000 µs surges up to 49 A without degradation, ensuring >10-year field life in carrier-class equipment. |
Use Scenario: Input-side transient suppression in USB-C PD adapters handling variable 5–20 V input from wall adapters or power banks. IC Role / Device Role / Timing Role: Standoff-rated TVS placed between input capacitor and primary-side controller to absorb coupling noise. Use Value: Maintains 18.8 V VWM margin above 20 V max input, enabling safe operation without false triggering during normal regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A-E3/52 | DO-214AA (SMB) package; 22 V VBR; 300 W PPPM; 200 W rated for 10/1000 µs | Lower power handling; suited for PCB space-constrained designs with moderate surge exposure | Select when board area is limited and peak surge energy is ≤300 W; not suitable for automotive load dump |
| 1.5KE22AHE3/54 | Same 1.5KE package, identical electrical specs (VBR, VC, PPPM); differs only in part numbering convention (JEDEC vs. manufacturer prefix) | No functional difference; identical AEC-Q101 qualification and thermal performance | Direct form-fit-function replacement; interchangeable in BOMs and layouts without redesign |
Compared with 1N6279HE3/54, SMBJ22A-E3/52 offers smaller footprint but sacrifices 80% peak power capability, while 1.5KE22AHE3/54 provides identical protection performance in the same axial package-making it a seamless drop-in alternative for sourcing flexibility.
Availability
1N6279HE3/54 is available at Aetrix Electronics and suitable for automotive power systems, industrial sensor nodes, telecom line cards, and consumer power adapters requiring stable component supply, AEC-Q101 compliance, and high-reliability surge immunity.
Supply support for 1N6279HE3/54 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The 1N6279HE3/54 belongs to Vishay's TRANSZORB® TVS family, engineered for high-energy transient suppression in harsh environments-including automotive, industrial automation, and infrastructure communications-where sub-nanosecond response and AEC-Q101 validation are mandatory.
FAQ
What is the breakdown voltage tolerance of the 1N6279HE3/54?
The 1N6279HE3/54 has a specified breakdown voltage range of 20.9 V to 23.1 V at test current IT = 1 mA, representing ±5% tolerance around the nominal 22 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature extremes, critical for protecting 24 V system components with narrow voltage margins.
Is the 1N6279HE3/54 suitable for automotive under-hood applications?
Yes, the 1N6279HE3/54 is AEC-Q101 qualified and rated for junction temperatures from –55 °C to +175 °C, making it suitable for under-hood automotive use. Its glass-passivated junction, JESD 201 Class 2 whisker resistance, and validated performance under load dump (ISO 7637-2 Pulse 5a) confirm its readiness for engine control units, body controllers, and ADAS power domains.
How does the clamping voltage of the 1N6279HE3/54 compare to its standoff voltage?
The 1N6279HE3/54 has a maximum standoff voltage (VWM) of 18.8 V and a clamping voltage (VC) of 30.6 V at 49 A. This 11.8 V differential provides sufficient headroom to avoid false triggering during normal operation while limiting transient overvoltage to a safe level for downstream 36 V-rated ICs-ensuring both reliability and protection integrity.
What is the thermal resistance of the 1N6279HE3/54, and how does it affect layout design?
The 1N6279HE3/54 has a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W and junction-to-ambient (RθJA) of 75 °C/W. To sustain 6.5 W continuous dissipation, PCB copper pour and lead length must be optimized-minimum 0.375" (9.5 mm) lead length recommended per Fig. 5, and thermal vias under mounting pads improve heat transfer in high-power surge scenarios.
Does the 1N6279HE3/54 require derating at elevated ambient temperatures?
Yes, the 1N6279HE3/54 requires linear derating above TA = 25 °C per Figure 2. At 85 °C ambient, its peak pulse power drops to ~850 W, and at 125 °C, to ~550 W. For sustained surge exposure in hot environments, designers must verify worst-case IPPM and VC using the derated PPPM curve to ensure clamping remains within safe limits for protected circuitry.
1N6279HE3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 17.8V
- Voltage - Breakdown (Min):
- 19.8V
- Voltage - Clamping (Max) @ Ipp:
- 31.9V
- Current - Peak Pulse (10/1000µs):
- 47A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1N6279HE3/54 FAQ
1.How can I place an order for 1N6279HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6279HE3/54 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 1N6279HE3/54 reliable?
The price and inventory of 1N6279HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6279HE3/54 is usually 5 days.
3.What payment methods are accepted for 1N6279HE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6279HE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6279HE3/54?
1N6279HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6279HE3/54 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 1N6279HE3/54?
For technical support, including 1N6279HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6279HE3/54 requirements.
6.How does Aetrix verify that 1N6279HE3/54 is sourced from the original manufacturer or authorized distributors?
All 1N6279HE3/54 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 1N6279HE3/54 meets industry standards.
7.What is the process for return or replacement of 1N6279HE3/54?
All 1N6279HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6279HE3/54, 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 1N6279HE3/54 part is unused and in its original packaging.
Return procedure for 1N6279HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6279HE3/54 Tags
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