My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1N6279A-E3/73
- Part No.:
- 1N6279A-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1N6279A-E3/73.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,718
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N6279A-E3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary-side overvoltage protection in DC power rails and signal lines. It features a 22 V breakdown voltage (VBR = 20.9–23.1 V at IT = 1.0 mA), 30.6 V clamping voltage (VC) at 49.0 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 transients and inductive switching surges.
For engineers reviewing the 1N6279A-E3/73 datasheet, 1N6279A-E3/73 pinout, 1N6279A-E3/73 application, or 1N6279A-E3/73 equivalent, this part delivers verified bidirectional-capable clamping performance, RoHS-compliant matte tin-plated leads, and JEDEC-standard 1.5KE package compatibility - critical for automotive ECU power input stages, industrial PLC I/O protection, and telecom line interface designs requiring AEC-Q101-qualified surge resilience.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds its 22 V breakdown threshold, it avalanches rapidly (<1 ns response) to divert surge current away from downstream circuitry. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling consistent clamping at 30.6 V under 49 A 10/1000 µs pulses.
Thermal design is supported by RθJA = 75 °C/W and RθJL = 15.4 °C/W, allowing reliable operation up to TJ = +175 °C. The device sustains 200 A non-repetitive forward surge (8.3 ms half-sine) and exhibits 1.0 µA max reverse leakage at 18.8 V stand-off voltage - confirming suitability for low-power standby circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1.0 mA - defines precise avalanche initiation window for repeatable overvoltage triggering |
| VWM | 18.8 V - maximum continuous working voltage before leakage exceeds 1.0 µA; sets safe DC rail margin |
| VC @ IPPM | 30.6 V at 49.0 A - clamping voltage during full 1500 W surge; determines protected circuit's peak stress level |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform; enables robust lightning strike immunity |
| IFSM | 200 A - single-cycle surge current capacity (8.3 ms); supports high-energy inductive kickback suppression |
| TJ max. | +175 °C - extended junction temperature rating allows deployment in under-hood automotive or industrial enclosures |
| Package | Case Style 1.5KE - industry-standard axial-leaded DO-201AD package with 0.375" lead length; compatible with wave soldering |
Pinout & Package
1N6279A-E3/73 uses the standard DO-201AD (Case Style 1.5KE) axial-leaded package: cathode indicated by color band; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction or transient clamping | Connected to protected circuit ground or low-side return path; must handle full surge current without bond wire failure |
| Cathode | Current exit terminal; marked with color band | Connected to protected line (e.g., 24 V rail); avalanche occurs when cathode-to-anode voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Ensures ±5% VBR tolerance and long-term stability under thermal cycling and humidity stress |
| 1500 W peak pulse power (10/1000 µs) | Validated clamping performance against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 24 V systems |
| Response time <1 ns | Clamps transients before sensitive logic or analog circuitry experiences destructive overvoltage |
| RoHS-compliant, matte tin-plated leads | Enables lead-free reflow and wave soldering per JESD 201 Class 1A whisker resistance |
| Operating TJ = -55 °C to +175 °C | Supports deployment in engine control units, motor drives, and outdoor telecom equipment |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Guarding |
|---|---|
Use Scenario: Protecting 12 V/24 V power inputs of engine control modules (ECMs) against load dump and jump-start transients. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between battery rail and system ground; clamps >100 V spikes within nanoseconds. Use Value: Prevents latch-up or gate oxide rupture in MCU power management ICs by limiting rail voltage to ≤30.6 V during 1500 W surges. |
Use Scenario: Shielding 4–20 mA current loop inputs of PLC analog I/O modules from ESD and field wiring surges. IC Role / Device Role / Timing Role: Unidirectional TVS connected across signal and return lines; absorbs fast-rising transients induced by nearby motor switching. Use Value: Maintains signal integrity below 18.8 V working voltage while clamping 49 A surges to 30.6 V - preserving ADC reference accuracy and isolator integrity. |
| Telecom Line Interface Surge Suppression | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding Ethernet PHY power pins and bias rails in outdoor network switches exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-stage TVS on 3.3 V/5 V supply lines; coordinated with secondary GDT or polymer PTC for multi-level protection. Use Value: Limits transient energy entering PHY ICs to sub-joule levels via 30.6 V clamping - meeting GR-1089-CORE Level 3 requirements. |
Use Scenario: Protecting microcontroller GPIOs and gate drivers in smart appliance motor controllers from back-EMF spikes. IC Role / Device Role / Timing Role: Localized TVS on H-bridge supply rails and sense resistor returns; activated within 1 ns of inductive voltage reversal. Use Value: Eliminates need for oversized snubbers by clamping 200 A inductive surges to 30.6 V - reducing board space and BOM cost. |
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), lower PPPM = 600 W, VC = 35.5 V @ 17.1 A | Surface-mount only; unsuitable for through-hole legacy designs or high-current chassis grounding | Select when PCB real estate is constrained and surge energy is limited to IEC 61000-4-5 Level 2. |
| 1.5KE22A-E3/54 | Same 1.5KE package and electrical specs; differs only in tape-and-reel packaging (1400 pcs/reel vs. 750 pcs/reel for /73) | No functional or circuit-level difference; identical placement, soldering, and reliability behavior | Choose for automated SMT assembly lines requiring standard 13" reels. |
Compared with SMBJ22A, 1N6279A-E3/73 provides 2.5× higher surge power handling and axial-leaded mechanical robustness for chassis-grounded protection; versus 1.5KE22A-E3/54, it offers identical protection performance but optimized for smaller-batch manual or semi-automated assembly via 750-piece reels.
Availability
1N6279A-E3/73 is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor guarding, telecom line interface surge suppression, and consumer appliance motor drive protection requiring stable component supply and traceable sourcing.
Supply support for 1N6279A-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, precision, and automotive-grade qualification.
The 1N6279A-E3/73 belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and infrastructure applications where failure is not an option.
FAQ
What is the breakdown voltage range of the 1N6279A-E3/73?
The 1N6279A-E3/73 has a guaranteed breakdown voltage range of 20.9 V to 23.1 V at a test current of 1.0 mA. This tight ±5% tolerance ensures predictable and repeatable clamping onset across production lots and temperature extremes, making the 1N6279A-E3/73 suitable for precision overvoltage protection in regulated power systems where margin control is critical.
Is the 1N6279A-E3/73 RoHS compliant and lead-free solder compatible?
Yes, the 1N6279A-E3/73 carries the "E3" suffix indicating full RoHS compliance and matte tin-plated leads qualified per J-STD-002 and JESD 22-B102. It withstands solder dip at 275 °C for up to 10 seconds and passes JESD 201 Class 1A whisker testing - confirming compatibility with both lead-free reflow and wave soldering processes used in modern electronics manufacturing.
How does the 1N6279A-E3/73 compare to bidirectional TVS diodes like 1N6279CA?
The 1N6279A-E3/73 is unidirectional and intended for DC rail protection where polarity is fixed; it cannot clamp negative-going transients. In contrast, 1N6279CA provides symmetrical clamping for AC or floating lines. For 1N6279A-E3/73, the cathode band identifies polarity - incorrect orientation prevents clamping. Use 1N6279A-E3/73 only where circuit topology guarantees positive-only overvoltage events.
What is the maximum clamping voltage of the 1N6279A-E3/73 under surge conditions?
The 1N6279A-E3/73 clamps to a maximum of 30.6 V when subjected to its rated 49.0 A peak pulse current (10/1000 µs waveform). This value - measured at the device terminals under standardized test conditions - defines the highest voltage that downstream components will experience during a full 1500 W transient event, directly informing safe operating margins for connected ICs and passives.
Can the 1N6279A-E3/73 be used in automotive applications requiring AEC-Q101 qualification?
No - the 1N6279A-E3/73 is commercial grade only. For AEC-Q101 qualification, select the HE3-suffixed variant (e.g., 1.5KE22AHE3_B). The 1N6279A-E3/73 shares identical electrical specs and package but lacks the extended reliability testing required for automotive under-hood use. Always verify qualification status via Vishay's official datasheet revision notes before deploying 1N6279A-E3/73 in safety-critical automotive systems.
1N6279A-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:
- 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-E3/73 FAQ
1.How can I place an order for 1N6279A-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6279A-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 1N6279A-E3/73 reliable?
The price and inventory of 1N6279A-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 1N6279A-E3/73 is usually 5 days.
3.What payment methods are accepted for 1N6279A-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6279A-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6279A-E3/73?
1N6279A-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6279A-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 1N6279A-E3/73?
For technical support, including 1N6279A-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6279A-E3/73 requirements.
6.How does Aetrix verify that 1N6279A-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1N6279A-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 1N6279A-E3/73 meets industry standards.
7.What is the process for return or replacement of 1N6279A-E3/73?
All 1N6279A-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6279A-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 1N6279A-E3/73 part is unused and in its original packaging.
Return procedure for 1N6279A-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6279A-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 …
