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Vishay General Semiconductor - Diodes Division 1N6279HE3/73
- Part No.:
- 1N6279HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1N6279HE3/73.pdf
- Description:
- TVS DIODE 17.8VWM 31.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:3,134
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Product details
Overview
1N6279HE3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary-side overvoltage protection in 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), clamping voltage of 30.6 V at 49 A, and operates across –55 °C to +175 °C junction temperature. It is used to protect MOSFETs, microcontrollers, and sensor interfaces against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1N6279HE3/73 datasheet, 1N6279HE3/73 pinout, 1N6279HE3/73 application, or 1N6279HE3/73 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), JEDEC 1.5KE package dimensions, and design-meaningful clamping behavior under standardized surge waveforms.
Technical Context
This device implements a glass-passivated silicon PN junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its unidirectional polarity enables cathode-referenced clamping on positive-going transients, with VF = 3.5 V at 100 A forward surge current - critical for minimizing conduction loss during high-energy events.
The 1N6279HE3/73 belongs to the 1.5KE family rated for 1500 W peak pulse power per 10/1000 µs waveform at 0.01% duty cycle. It is RoHS-compliant (E3 suffix) and AEC-Q101 qualified (HE3 suffix), with matte tin-plated leads meeting 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 1 mA - defines precise clamping onset threshold for reliable overvoltage detection |
| VWM | 18.8 V - maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC @ IPPM | 30.6 V at 49 A - actual clamped voltage during full 1500 W surge, limiting downstream stress |
| PPPM | 1500 W - peak transient energy absorption capability using standard 10/1000 µs test waveform |
| IFSM | 200 A - non-repetitive forward surge rating (8.3 ms half-sine), supporting high-current fault clearing |
| TJ max | +175 °C - extended junction temperature rating enabling use in under-hood automotive and industrial power stages |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, informing heatsinking requirements for sustained power dissipation |
Pinout & Package
Package: JEDEC 1.5KE molded epoxy case (Case Style 1.5KE), axial-leaded, RoHS-compliant, with cathode band marking. Dimensions: 5.3 mm diameter × 9.5 mm length (0.210" × 0.375").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction or clamping of negative transients | Connected to ground or low-impedance return path; must handle 200 A surge without bond wire failure |
| Cathode | Current exit point during reverse-biased clamping of positive transients | Marked with color band; connects to protected line - clamps to ≤30.6 V when VIN exceeds 22 V |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance (±5%) and long-term reliability under humidity and thermal cycling |
| AEC-Q101 qualification (HE3 suffix) | Validated for automotive powertrain and body electronics per stress test requirements including HTGB, HTRB, and TCT |
| 1500 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity without external series impedance |
| Clamping time <1 ns | Protects sub-10 ns sensitive logic inputs (e.g., MCU reset pins, ADC reference inputs) before damage occurs |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth in high-reliability applications where field failure due to shorting is unacceptable |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12 V battery rail in engine control units exposed to load dump (ISO 7637-2 Pulse 5a) and alternator transients. IC Role / Device Role / Timing Role: Primary clamping element placed between battery input and DC/DC converter input stage. Use Value: Limits voltage to ≤30.6 V during 1500 W surges, preventing overvoltage shutdown or destruction of 36 V-rated buck controllers. |
Use Scenario: 4–20 mA current loop interface in factory automation PLC modules subject to EFT/burst noise. IC Role / Device Role / Timing Role: Unidirectional TVS shunting induced spikes on analog input terminals before op-amp front-end. Use Value: Clamps transients within 1 ns while maintaining <1 µA leakage at 18.8 V, preserving loop accuracy and offset stability. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Output Protection |
Use Scenario: DC feed line (–48 V) in telecom base station line cards subjected to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Cathode-connected to –48 V rail, anode to chassis ground - clamps positive excursions only. Use Value: Withstands 200 A 8.3 ms surge (IFSM), enabling compliance with Telcordia GR-1089-CORE Level 3 surge immunity. |
Use Scenario: 5 V/9 V/12 V USB-C PD adapter output port exposed to user-induced hot-plug transients and cable ESD. IC Role / Device Role / Timing Role: Final-stage TVS placed immediately before connector to suppress contact bounce and insertion spikes. Use Value: 30.6 V clamping ensures connected devices (e.g., smartphones, tablets) remain below absolute maximum ratings during 1500 W events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A | DO-214AA package (smaller footprint), 22 V VBR, same 1500 W rating but lower IPPM (65.1 A vs. 49 A), higher VC (35.5 V) | Preferred for space-constrained PCBs; less effective clamping margin (ΔV = 13.5 V vs. 11.8 V) | Select SMBJ22A only if board area is critical and system can tolerate higher clamped voltage. |
| 1.5KE22A-E3/54 | Same 1.5KE package and electrical specs, but commercial-grade (non-AEC-Q101), E3-only (no HE3 suffix), JESD 201 Class 1A whisker rating | Acceptable for industrial/commercial power supplies but not automotive under-hood deployment | Choose 1.5KE22A-E3/54 for cost-sensitive non-automotive designs requiring identical form/fit/function without qualification overhead. |
Compared with SMBJ22A and 1.5KE22A-E3/54, the 1N6279HE3/73 uniquely combines AEC-Q101 qualification, JEDEC 1.5KE mechanical robustness, and lowest clamping voltage (30.6 V) in its VBR class - making it the preferred choice for automotive and high-reliability industrial systems where surge margin and long-term validation are mandatory.
Availability
1N6279HE3/73 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor signal conditioning, telecom line card protection, and consumer power adapter output stages requiring stable component supply and traceable sourcing.
Supply support for 1N6279HE3/73 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, TVS devices, and optoelectronics with emphasis on reliability, power handling, and automotive qualification.
The 1.5KE family - including 1N6279HE3/73 - was engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure applications demanding AEC-Q101 compliance and 1500 W surge resilience.
FAQ
What is the breakdown voltage tolerance for 1N6279HE3/73?
The 1N6279HE3/73 has a specified breakdown voltage range of 20.9 V to 23.1 V at 1 mA test current, representing a ±5% tolerance around the nominal 22 V rating. This tight VBR window ensures consistent clamping onset across production lots and supports predictable circuit protection design without derating overhead.
Is 1N6279HE3/73 suitable for bidirectional transient suppression?
No, the 1N6279HE3/73 is a unidirectional TVS diode - it clamps only positive transients relative to its cathode. For bidirectional protection, Vishay offers variants with "CA" suffix (e.g., 1.5KE22CA). The 1N6279HE3/73 must be oriented with cathode toward the protected line and anode to ground to function correctly.
What does the "HE3/73" suffix indicate in 1N6279HE3/73?
The "HE3" denotes RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance; "/73" specifies packaging in 73 mm tape-and-reel format (1400 pcs/reel). This distinguishes it from commercial-grade E3 variants and non-qualified versions, confirming suitability for automotive and high-reliability deployments.
How does thermal resistance affect 1N6279HE3/73 performance in continuous operation?
With RθJA = 75 °C/W, the 1N6279HE3/73 dissipates heat primarily through its leads. Under sustained 6.5 W power (PD), junction temperature rise reaches ~488 °C above ambient - exceeding its 175 °C limit. Thus, the device is intended for transient-only duty; continuous dissipation requires external heatsinking or derating per Fig. 5 in the datasheet.
Can 1N6279HE3/73 replace 1N6279A in existing designs?
Yes - the 1N6279HE3/73 is a direct drop-in replacement for 1N6279A, retaining identical electrical characteristics, 1.5KE package dimensions, and pinout. The HE3/73 adds AEC-Q101 qualification, RoHS compliance, and enhanced whisker resistance, making it suitable for upgraded reliability requirements without layout changes.
1N6279HE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- 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
1N6279HE3/73 FAQ
1.How can I place an order for 1N6279HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6279HE3/73 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 1N6279HE3/73 reliable?
The price and inventory of 1N6279HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6279HE3/73 is usually 5 days.
3.What payment methods are accepted for 1N6279HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6279HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6279HE3/73?
1N6279HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6279HE3/73 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 1N6279HE3/73?
For technical support, including 1N6279HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6279HE3/73 requirements.
6.How does Aetrix verify that 1N6279HE3/73 is sourced from the original manufacturer or authorized distributors?
All 1N6279HE3/73 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 1N6279HE3/73 meets industry standards.
7.What is the process for return or replacement of 1N6279HE3/73?
All 1N6279HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6279HE3/73, 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 1N6279HE3/73 part is unused and in its original packaging.
Return procedure for 1N6279HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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