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Vishay General Semiconductor - Diodes Division 1N6279-E3/54
- Part No.:
- 1N6279-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1N6279-E3/54.pdf
- Description:
- TVS DIODE 17.8VWM 31.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,294
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Product details
Overview
1N6279-E3/54 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 in automotive power supply inputs and industrial sensor interface protection.
For engineers reviewing the 1N6279-E3/54 datasheet, 1N6279-E3/54 pinout, 1N6279-E3/54 application, or 1N6279-E3/54 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, clamping performance under surge conditions, thermal derating behavior, and RoHS-compliant commercial-grade sourcing status.
Technical Context
The 1N6279-E3/54 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 a maximum reverse leakage of 1.0 µA at 18.8 V stand-off voltage (VWM).
It complies with JEDEC standard 1.5KE case outline and supports 10/1000 µs waveform testing per R.E.A. specifications. Thermal resistance is 75 °C/W (junction-to-ambient) and 15.4 °C/W (junction-to-lead), enabling reliable operation up to 175 °C junction temperature with appropriate PCB copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1 mA - defines minimum clamping onset threshold and maximum variation across production lot |
| VWM | 18.8 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 30.6 V at 49 A - peak clamped voltage during 1500 W transient, critical for downstream IC survivability |
| PPPM | 1500 W - peak pulse power handling for 10/1000 µs waveform, defining surge energy absorption capability |
| IFSM | 200 A - non-repetitive forward surge current rating (8.3 ms half-sine), relevant for fault-current limiting |
| TJ max. | +175 °C - maximum junction temperature, enabling use in under-hood automotive and high-ambient industrial environments |
| RθJA | 75 °C/W - thermal resistance indicating required PCB copper area for safe power dissipation at ambient |
Pinout & Package
Package: JEDEC 1.5KE molded epoxy case (DO-201AD), axial-leaded, RoHS-compliant matte tin-plated leads. Cathode identified by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to lower-potential side (e.g., ground or return) in unidirectional clamp configuration |
| Cathode | Reverse-biased clamping node | Connected to protected line (e.g., 24 V rail); conducts when transient exceeds VWM |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-earth) without external series impedance |
| Clamping ratio (VC/VBR) ≈ 1.32 | Indicates efficient voltage limiting with minimal overvoltage margin beyond breakdown |
| Response time <1 ns | Enables protection of high-speed interfaces (e.g., CAN, RS-485) against ESD and fast transients |
| Ambient operating range –55 °C to +175 °C | Validates suitability for engine control units, motor drives, and outdoor telecom equipment |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to shunt surges before reaching DC-DC converters. Use Value: Clamps transients to ≤30.6 V, preserving input stage MOSFETs and LDOs rated for 36 V absolute maximum. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and inductive coupling in factory automation. IC Role / Device Role / Timing Role: Low-capacitance TVS connected across differential pair or single-ended output to suppress ±8 kV contact ESD per IEC 61000-4-2. Use Value: Sub-1 ns response prevents latch-up in op-amp front-ends; 1.0 µA leakage at 18.8 V avoids signal offset drift. |
| Telecom Line Interface Surge Guard | Consumer Power Adapter Overvoltage Clamp |
Use Scenario: Safeguarding PoE-powered Ethernet PHYs from lightning-induced surges on twisted-pair cables. IC Role / Device Role / Timing Role: Primary-stage TVS on PSE or PD side, coordinated with gas discharge tube (GDT) for multi-stage protection. Use Value: 1500 W rating handles 10/1000 µs surges up to 4 kV; 175 °C TJ max ensures stability in sealed enclosures. | Use Scenario: Preventing damage to AC-DC controller ICs during brownout recovery or MOV failure in wall adapters. IC Role / Device Role / Timing Role: Secondary-side TVS across bulk capacitor to clamp overvoltage events exceeding 25 V. Use Value: 22 V VBR aligns with 24 V nominal output; 30.6 V clamping protects 36 V-rated controllers without crowbar triggering. |
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, 600 W PPPM, lower IPPM (32.4 A) | Lower power handling; suited for space-constrained PCBs where 1500 W surge is not required | Select SMBJ22A when board area is limited and peak surge energy is ≤600 W |
| 1.5KE22A | Same 1.5KE package, identical VBR/VC/PPPM; differs only in packaging suffix (E3/54 vs. standard tape-and-reel) | No functional difference; identical electrical and thermal performance | Choose 1.5KE22A if standard reel packaging (not E3/54) meets procurement requirements |
Compared with SMBJ22A, the 1N6279-E3/54 delivers 2.5× higher surge power handling in the same voltage class but requires larger PCB footprint; versus 1.5KE22A, it offers identical protection performance with RoHS-compliant E3 plating and 54-tape packaging for automated assembly.
Availability
1N6279-E3/54 is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor interface clamping, and telecom line surge guard applications requiring stable component supply and full traceability.
Supply support for 1N6279-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 supplier of discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability and automotive qualification.
The 1N6279-E3/54 belongs to Vishay's TRANSZORB® 1.5KE family-designed specifically for high-energy transient suppression in harsh-environment power and signal lines where robustness and repeatable clamping are mandatory.
FAQ
What is the breakdown voltage tolerance of the 1N6279-E3/54?
The 1N6279-E3/54 has a specified breakdown voltage range of 20.9 V to 23.1 V at 1 mA test current, representing ±5% tolerance around the nominal 22 V rating. This tight VBR window ensures predictable clamping onset across manufacturing lots and temperature extremes, critical for protecting 24 V systems where overvoltage margins are narrow. The 1N6279-E3/54 maintains this specification per Vishay Document 88301 Rev. 09-Aug-2022.
Is the 1N6279-E3/54 RoHS compliant and lead-free?
Yes, the 1N6279-E3/54 is RoHS compliant and lead-free, as confirmed by the "E3" suffix per Vishay's ordering nomenclature. The "E3" designation indicates matte tin-plated leads meeting J-STD-002 and JESD 22-B102 solderability standards, plus JESD 201 Class 1A whisker resistance. This makes the 1N6279-E3/54 suitable for commercial-grade applications requiring environmental compliance without AEC-Q101 qualification.
What is the maximum clamping voltage of the 1N6279-E3/54 under surge conditions?
The maximum clamping voltage (VC) of the 1N6279-E3/54 is 30.6 V at 49 A peak pulse current (IPPM), measured with a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case surge events. For system-level design, this 30.6 V clamping level must be compared against the absolute maximum ratings of downstream components-such as 36 V-rated DC-DC controllers-to ensure margin. The 1N6279-E3/54 achieves this performance consistently across its operating temperature range.
Can the 1N6279-E3/54 be used in bidirectional configurations?
No, the 1N6279-E3/54 is a unidirectional TVS diode and cannot be used for bidirectional transient suppression. Its polarity is fixed: the banded end is the cathode, and it conducts only during positive transients on that terminal relative to anode. For bidirectional protection, Vishay offers the 1N6279CA variant (or 1.5KE22CA), which lacks polarity marking and clamps symmetrically in both directions. Using the 1N6279-E3/54 in a bidirectional role would leave negative transients unclamped.
What is the thermal resistance and power derating behavior of the 1N6279-E3/54?
The 1N6279-E3/54 has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15.4 °C/W. Its steady-state power dissipation (PD) is rated at 6.5 W at TL = 75 °C, derating linearly above that temperature per Figure 5 in Vishay Document 88301. At 25 °C ambient with minimal copper, usable surge duty cycle is limited; effective thermal management-such as ≥1 in² 2-oz copper pad-enables sustained operation. This thermal profile is integral to the 1N6279-E3/54's 175 °C TJ max rating.
1N6279-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:
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1N6279-E3/54 FAQ
1.How can I place an order for 1N6279-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6279-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 1N6279-E3/54 reliable?
The price and inventory of 1N6279-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 1N6279-E3/54 is usually 5 days.
3.What payment methods are accepted for 1N6279-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6279-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6279-E3/54?
1N6279-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6279-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 1N6279-E3/54?
For technical support, including 1N6279-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6279-E3/54 requirements.
6.How does Aetrix verify that 1N6279-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1N6279-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 1N6279-E3/54 meets industry standards.
7.What is the process for return or replacement of 1N6279-E3/54?
All 1N6279-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6279-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 1N6279-E3/54 part is unused and in its original packaging.
Return procedure for 1N6279-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6279-E3/54 Tags
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