My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1N6279-E3/73
- Part No.:
- 1N6279-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1N6279-E3/73.pdf
- Description:
- TVS DIODE 17.8VWM 31.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:9,486
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N6279-E3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary-level 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), 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, ICs, and sensor interfaces against inductive switching transients and ESD in industrial power supplies.
For engineers reviewing the 1N6279-E3/73 datasheet, 1N6279-E3/73 pinout, 1N6279-E3/73 application, or 1N6279-E3/73 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, clamping behavior under surge conditions, thermal derating curves, and direct alternatives with documented differences in standoff voltage and peak current capability.
Technical Context
This device implements a glass-passivated silicon junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its unidirectional polarity enables cathode-referenced placement on positive-rail protection paths, with a 18.8 V maximum working voltage (VWM) and 1.0 µA max reverse leakage at that voltage.
The 1N6279-E3/73 complies with JEDEC standard 1.5KE case outline, supports 200 A non-repetitive forward surge current (8.3 ms half-sine), and exhibits a +0.092 %/°C temperature coefficient of VBR, ensuring stable clamping across wide ambient ranges in automotive and industrial environments.
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 DC operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 30.6 V at 49 A - clamped voltage during 1500 W transient, limiting downstream stress |
| PPPM | 1500 W (10/1000 µs waveform) - sustains high-energy surges without failure in power supply inputs |
| IFSM | 200 A (8.3 ms half-sine) - withstands repetitive inrush or fault currents in motor drive circuits |
| TJ range | –55 °C to +175 °C - enables deployment in under-hood automotive or high-temp industrial enclosures |
| RθJA | 75 °C/W - requires minimal heatsinking for 6.5 W steady-state dissipation at TL = 75 °C |
Pinout & Package
Package: JEDEC 1.5KE molded epoxy case (axial lead, DO-201AD), RoHS-compliant matte tin-plated leads, UL 94 V-0 rated molding compound. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for unidirectional clamping | Connected to ground or low-side return path; forms low-impedance shunt during overvoltage |
| Cathode | Protected line connection point | Connected to rail being protected (e.g., +12 V input); color-banded end per JEDEC marking |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance (±5 %) and long-term reliability under thermal cycling |
| 1500 W peak pulse rating | Handles lightning-induced surges per IEC 61000-4-5 Level 4 (4 kV) without degradation |
| Sub-nanosecond response | Clamps transients within 1 ns-faster than MOVs or polymer-based protectors |
| AEC-Q101 qualified variants available | HE3 suffix versions meet automotive-grade stress testing (not applicable to -E3/73, but same platform) |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage overshoot during surge events, protecting 24 V-rated ICs |
Applications
| Industrial Motor Drive Inputs | Automotive Body Control Module (BCM) Power Rails |
|---|---|
Use Scenario: Protection of 24 V DC input stage against inductive kickback from solenoid valves and relay coils. IC Role / Device Role: Primary shunt TVS placed between VIN and GND, upstream of DC/DC converter. Use Value: Limits transient voltage to ≤30.6 V, preventing damage to 36 V-rated buck controller ICs and enabling compliance with ISO 7637-2 Pulse 1/2a. |
Use Scenario: Guarding microcontroller power supply pins against load dump and jump-start surges. IC Role / Device Role: Unidirectional clamp on +12 V rail feeding BCM MCU and CAN transceivers. Use Value: Withstands 200 A surge (8.3 ms) and clamps to 30.6 V, preserving 3.3 V LDO input integrity via staged protection. |
| Telecom Remote Sensor Interface | Consumer Appliance Mainboard Power Entry |
Use Scenario: Shielding RS-485 transceiver VCC and data lines from induced lightning on outdoor cabling. IC Role / Device Role: Rail-to-rail TVS on 5 V supply line feeding isolated interface ICs. Use Value: 1500 W rating absorbs 10/1000 µs surges up to 4 kV; low VC prevents latch-up in 5 V logic devices. |
Use Scenario: Overvoltage safeguard on AC/DC adapter output feeding mainboard SMPS controller. IC Role / Device Role: First-line defense on 19 V DC bus before primary PWM IC and gate drivers. Use Value: Fast response prevents propagation of 100 V+ spikes into sensitive timing circuitry; RoHS/E3 compliance meets global safety standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A | Lower PPPM (600 W), smaller SMB package (3.5 mm × 4.5 mm), VC = 35.5 V @ 17 A | Better suited for space-constrained PCBs with lower surge exposure (IEC 61000-4-2 only) | Select when board area is critical and peak surge energy remains below 600 W; not drop-in due to different footprint and lower IPPM |
| 1.5KE22A | Same electrical specs and 1.5KE package; differs only in packaging suffix (-E3/73 vs. -E3/54 tape-and-reel quantity) | Identical functional performance and mechanical fit; interchangeable in design | Choose 1.5KE22A for standard reel quantities (1400 pcs); 1N6279-E3/73 is functionally identical with alternate packaging configuration |
Compared with SMBJ22A, the 1N6279-E3/73 delivers 2.5× higher surge power handling and superior thermal robustness in axial-leaded layouts; versus 1.5KE22A, it offers identical protection performance with alternate tape-and-reel packaging-no electrical or mechanical redesign required.
Availability
1N6279-E3/73 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom remote sensor interfaces, and consumer appliance power entry points requiring stable component supply and full traceability.
Supply support for 1N6279-E3/73 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, and protection devices with emphasis on reliability, ruggedness, and AEC-Q101 qualification.
The 1N6279-E3/73 belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh environments-including automotive, industrial, and telecom infrastructure-where fast response and repeatable clamping are mandatory.
FAQ
What is the breakdown voltage tolerance for the 1N6279-E3/73?
The 1N6279-E3/73 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 predictable clamping onset and compatibility with 24 V system designs where margin above VWM (18.8 V) must be maintained without false triggering.
Is the 1N6279-E3/73 suitable for automotive applications?
The 1N6279-E3/73 itself is commercial-grade (E3 suffix), but it shares the same die and 1.5KE package as AEC-Q101-qualified variants like 1.5KE22AHE3_B. While not certified, its –55 °C to +175 °C operating range, 200 A surge rating, and robust glass-passivated junction make it widely deployed in non-safety-critical automotive subsystems such as HVAC controls and lighting modules-subject to customer validation.
How does the clamping voltage of the 1N6279-E3/73 compare to its breakdown voltage?
The 1N6279-E3/73 clamps to 30.6 V at its rated peak pulse current of 49 A, yielding a clamping ratio (VC/VBR) of approximately 1.35. This low ratio reflects efficient energy absorption and minimal overshoot-critical for protecting 36 V-tolerant ICs while maintaining margin below their absolute maximum ratings.
What is the thermal resistance of the 1N6279-E3/73, and how does it affect layout?
The 1N6279-E3/73 has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W. In practice, this means that at 6.5 W steady-state dissipation (its rated PD), the junction will rise 488 °C above ambient-so it must be operated only under pulsed conditions. Layout should maximize copper area on both leads and avoid enclosing the device; no heatsink is needed for transient-only use.
Can the 1N6279-E3/73 be used in bidirectional configurations?
No-the 1N6279-E3/73 is strictly unidirectional, as indicated by its "A" suffix and cathode band marking. Bidirectional variants in the same family carry "CA" suffixes (e.g., 1.5KE22CA). Using the 1N6279-E3/73 in reverse-biased AC applications would result in forward conduction and failure; always verify polarity during placement.
1N6279-E3/73 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1N6279-E3/73 FAQ
1.How can I place an order for 1N6279-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6279-E3/73 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 1N6279-E3/73 reliable?
The price and inventory of 1N6279-E3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6279-E3/73 is usually 5 days.
3.What payment methods are accepted for 1N6279-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6279-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6279-E3/73?
1N6279-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6279-E3/73 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 1N6279-E3/73?
For technical support, including 1N6279-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6279-E3/73 requirements.
6.How does Aetrix verify that 1N6279-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1N6279-E3/73 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 1N6279-E3/73 meets industry standards.
7.What is the process for return or replacement of 1N6279-E3/73?
All 1N6279-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6279-E3/73, 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 1N6279-E3/73 part is unused and in its original packaging.
Return procedure for 1N6279-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6279-E3/73 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
