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Vishay General Semiconductor - Diodes Division 1N6279A-E3/54
- Part No.:
- 1N6279A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1N6279A-E3/54.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:1,259
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Product details
Overview
1N6279A-E3/54 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, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1N6279A-E3/54 datasheet, 1N6279A-E3/54 pinout, 1N6279A-E3/54 application, or 1N6279A-E3/54 equivalent, this page delivers verified electrical parameters, package dimensions, clamping behavior under surge conditions, thermal derating curves, and direct alternatives for industrial power supply, automotive body electronics, and telecom line protection designs.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches into low-impedance conduction, limiting transient energy across protected circuit nodes. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at VWM).
It delivers 1500 W peak pulse power handling with 10/1000 µs waveform, 49 A maximum peak pulse current (IPPM), and 30.6 V clamping voltage - enabling robust protection of 24 V systems without overstressing downstream components. Thermal resistance is 15.4 °C/W (junction-to-lead), supporting reliable operation up to 175 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1 mA - defines precise avalanche initiation threshold for repeatable clamping onset |
| VWM | 18.8 V - maximum continuous reverse operating voltage before leakage rises above 1 µA |
| VC @ IPPM | 30.6 V at 49 A - clamped voltage during worst-case 10/1000 µs surge, limiting stress on protected ICs |
| PPPM | 1500 W - peak transient power dissipation capability, sufficient for IEC 61000-4-5 Level 4 surges |
| IFSM | 200 A - non-repetitive forward surge current rating, supports high-energy fault clearing in power circuits |
| TJ max. | 175 °C - enables use in under-hood automotive or industrial environments without thermal shutdown |
| RθJL | 15.4 °C/W - low junction-to-lead thermal resistance allows effective heat transfer to PCB copper or heatsink |
Pinout & Package
1N6279A-E3/54 uses the industry-standard Case Style 1.5KE axial-leaded package: molded epoxy body with matte tin-plated leads, RoHS-compliant (E3 suffix), UL 94 V-0 rated, and qualified per JESD 22-B106 (solder dip 275 °C, 10 s). The cathode is marked by a color band on the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse surge return path | Connected to ground or low-impedance return node; carries full surge current during clamping |
| Cathode | Reverse-biased terminal / clamping reference | Connected to protected line; avalanche conduction begins here when VAK > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5 %), low leakage (<1 µA), and long-term reliability under thermal cycling |
| 1500 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive applications |
| 30.6 V clamping voltage at 49 A | Provides safe margin below 33 V logic rail limits while suppressing >1 kV transients |
| 175 °C maximum junction temperature | Supports operation in engine control units, power converters, and outdoor telecom enclosures |
| AEC-Q101 qualification available (HE3 variant) | Validated for automotive-grade reliability including HTOL, temperature cycling, and ESD testing |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protecting 24 V input rails of PLC I/O modules against load dump and relay coil flyback. IC Role / Device Role: Shunt-type transient suppressor placed between VIN and GND, clamping surges before they reach DC-DC controllers and microcontrollers. Use Value: Limits transient voltage to ≤30.6 V during 49 A surges, preventing latch-up or gate oxide damage in 3.3 V/5 V logic supplies. |
Use Scenario: Safeguarding LIN bus transceivers and window motor drivers from battery voltage spikes and ESD events. IC Role / Device Role: Unidirectional TVS connected from LIN line to chassis ground, absorbing coupled transients without disrupting DC bias. Use Value: Fast <1 ns response time and low clamping voltage preserve signal integrity while meeting ISO 16750-2 pulse 5a requirements. |
| Telecom DSL Line Interface | Consumer Appliance Motor Drive |
Use Scenario: Protecting ADSL/VDSL line interface ICs from lightning-induced surges on twisted-pair copper lines. IC Role / Device Role: Primary protection device placed upstream of gas discharge tube (GDT) and secondary TVS in hybrid protection network. Use Value: 1500 W rating handles multi-kV surges; 18.8 V VWM avoids false triggering during normal 24 V phantom power operation. |
Use Scenario: Shielding H-bridge gate drivers in washing machine motor controllers from inductive kickback during PWM commutation. IC Role / Device Role: Unidirectional TVS mounted across each half-bridge supply rail (VCC/GND) to clamp flyback spikes. Use Value: 200 A IFSM rating withstands repeated motor stall currents; glass passivation ensures lifetime stability in humid environments. |
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 (SMB), 22 V VBR, 33.2 V VC @ 45.2 A, 600 W PPPM | Lower power rating; suited for space-constrained PCBs where 1500 W is not required | Select SMBJ22A when board area is limited and surge threat level is IEC 61000-4-5 Level 3 or lower |
| 1.5KE22A | Same 1.5KE package, identical VBR/VC/PPPM specs, but base part number without E3/54 tape-and-reel designation | No RoHS or packaging differentiation; functionally identical electrical performance | Choose 1.5KE22A for manual assembly or non-automated production where reel packaging is unnecessary |
Compared with 1N6279A-E3/54, SMBJ22A offers smaller footprint but reduced surge capacity, while 1.5KE22A provides identical protection performance in alternate packaging - making the latter a direct functional match for legacy designs requiring same mechanical form factor.
Availability
1N6279A-E3/54 is available at Aetrix Electronics and suitable for industrial power supply protection, automotive body electronics, telecom line interface, and consumer appliance motor drive applications requiring stable component supply, consistent RoHS compliance, and traceable sourcing.
Supply support for 1N6279A-E3/54 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, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The 1N6279A-E3/54 belongs to Vishay's TRANSZORB® family of high-power TVS diodes, engineered specifically for robust overvoltage protection in harsh environments including automotive, industrial, and telecom infrastructure.
FAQ
What is the breakdown voltage tolerance for 1N6279A-E3/54?
The 1N6279A-E3/54 has a specified breakdown voltage range of 20.9 V to 23.1 V at 1 mA test current, corresponding to ±5 % tolerance around the nominal 22 V rating. This tight VBR spread ensures predictable clamping onset across production lots and supports accurate system-level surge margin analysis in designs using the 1N6279A-E3/54.
Is 1N6279A-E3/54 suitable for bidirectional transient protection?
No, the 1N6279A-E3/54 is a unidirectional TVS diode - its cathode band indicates polarity, and it conducts only in reverse avalanche mode. For bidirectional protection, Vishay offers the 1N6279CA variant (or 1.5KE22CA), which lacks polarity marking and clamps symmetrically in both directions. Using 1N6279A-E3/54 in AC-coupled or floating signal paths may result in unintended forward conduction.
What is the maximum clamping voltage of 1N6279A-E3/54 under surge conditions?
The 1N6279A-E3/54 exhibits a maximum clamping voltage (VC) of 30.6 V when subjected to its rated 49 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per JEDEC standards and represents the upper limit of voltage seen by protected circuitry during worst-case transient events - critical for ensuring compatibility with 3.3 V, 5 V, and 24 V system rails.
Does 1N6279A-E3/54 meet automotive qualification standards?
The base 1N6279A-E3/54 is commercial-grade; however, the AEC-Q101-qualified version is designated as 1N6279AHE3_B (or 1.5KE22AHE3_B), with identical electrical specs and enhanced reliability testing including temperature cycling, HTOL, and ESD. For automotive applications such as BCM or infotainment power rails, specify the HE3 variant to ensure compliance with automotive quality requirements.
How does the thermal resistance of 1N6279A-E3/54 affect PCB layout?
With a junction-to-lead thermal resistance (RθJL) of 15.4 °C/W, the 1N6279A-E3/54 relies on adequate copper pour connected to its leads for heat dissipation during repetitive surges. Layout best practice requires ≥10 mm² of 2 oz copper per lead, minimal trace length, and avoidance of thermal isolation - especially important in high-duty-cycle applications like motor drives where sustained power dissipation must be managed to maintain TJ ≤ 175 °C.
1N6279A-E3/54 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:
- Active
- 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-E3/54 FAQ
1.How can I place an order for 1N6279A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6279A-E3/54 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 1N6279A-E3/54 reliable?
The price and inventory of 1N6279A-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6279A-E3/54 is usually 5 days.
3.What payment methods are accepted for 1N6279A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6279A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6279A-E3/54?
1N6279A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6279A-E3/54 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 1N6279A-E3/54?
For technical support, including 1N6279A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6279A-E3/54 requirements.
6.How does Aetrix verify that 1N6279A-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1N6279A-E3/54 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 1N6279A-E3/54 meets industry standards.
7.What is the process for return or replacement of 1N6279A-E3/54?
All 1N6279A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6279A-E3/54, 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 1N6279A-E3/54 part is unused and in its original packaging.
Return procedure for 1N6279A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6279A-E3/54 Tags
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