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Vishay General Semiconductor - Diodes Division 1N6278AHE3_A/C
- Part No.:
- 1N6278AHE3_A/C
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1N6278AHE3_A/C.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,079
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Product details
Overview
1N6278AHE3_A/C 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 19.0–21.0 V breakdown voltage (VBR), 17.1 V stand-off voltage (VWM), 27.7 V clamping voltage at 54.2 A peak pulse current, 1500 W peak pulse power (10/1000 µs), 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 1N6278AHE3_A/C datasheet, 1N6278AHE3_A/C pinout, 1N6278AHE3_A/C application, or 1N6278AHE3_A/C equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJL = 15.4 °C/W), RoHS-compliant matte tin plating, and JEDEC 1.5KE package mechanical data - all confirmed from Vishay Document #88301 (Rev. 09-Aug-2022).
Technical Context
This unidirectional TVS diode employs a glass-passivated silicon junction optimized for fast clamping response (<1 ns) and low incremental surge resistance. Its 1500 W peak pulse power rating is defined under standardized 10/1000 µs waveform conditions with 0.01% duty cycle, and it maintains stable clamping performance up to 175 °C junction temperature.
The device exhibits 3.5 V maximum forward voltage at 100 A (per note 3), 1.0 µA max reverse leakage at VWM, and a positive temperature coefficient of VBR (+0.090 %/°C). It is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine) and meets JESD 22-B102 solderability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 19.0 V / 21.0 V - Ensures reliable conduction onset above normal operating voltage while avoiding false triggering. |
| VWM | 17.1 V - Maximum continuous reverse working voltage before significant leakage begins; defines safe operating margin. |
| VC @ IPPM | 27.7 V at 54.2 A - Clamped voltage during worst-case transient; determines protected circuit's maximum stress level. |
| PPPM | 1500 W (10/1000 µs) - Sustains high-energy surges without failure; enables robust protection in 24 V/48 V industrial systems. |
| IFSM | 200 A (8.3 ms half-sine) - Withstands large single-event inrush or fault currents without bond wire fusing. |
| TJ range | –55 °C to +175 °C - Supports operation in under-hood automotive, motor drive, and industrial ambient environments. |
| RθJL | 15.4 °C/W - Enables direct thermal coupling to PCB copper pour or heatsink for sustained power dissipation. |
Pinout & Package
Package: JEDEC 1.5KE molded epoxy case (Case Style 1.5KE), axial leaded, RoHS-compliant matte tin plating, UL 94 V-0 rated molding compound. Cathode indicated by color band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse bias reference | Connected to lower-potential side (e.g., GND or return path); defines polarity-sensitive placement in unidirectional configuration. |
| Cathode | Clamping node / Surge current sink | Connected to protected line (e.g., 24 V rail); conducts transient energy to ground when VAK exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable long-term reliability and low parameter drift under thermal cycling and humidity exposure. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive-grade stress testing including HTRB, HTGB, and temperature cycling - suitable for engine control modules. |
| 1500 W peak pulse power | Provides immunity to ISO 7637-2 Pulse 1/2a/5a transients and IEC 61000-4-5 Level 4 surges in 24 V systems. |
| 1.0 µA max reverse leakage @ VWM | Minimizes standby power loss and avoids false triggering in low-power sensor or battery-backed circuits. |
| Solderable per J-STD-002/JESD 22-B102 | Guarantees consistent wetting and joint integrity during wave or reflow assembly, even after storage. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O lines against back-EMF spikes from brushed DC motors and solenoids. IC Role / Device Role: Unidirectional TVS placed between motor supply rail and ground, clamping inductive kickback within 1 ns. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic inputs and MOSFET gate oxides during frequent switching cycles. |
Use Scenario: Safeguarding LIN bus transceivers and door module sensors from load dump and jump-start transients. IC Role / Device Role: Primary rail clamp on 12 V supply input, coordinated with upstream fuse and downstream LDO. Use Value: Maintains system uptime during 60 V/400 ms load dump events per ISO 16750-2, with no reset or brownout. |
| Telecom Power Feeds | PLC Analog Input Protection |
Use Scenario: Overvoltage suppression on 48 V phantom power lines feeding remote IP cameras and VoIP phones. IC Role / Device Role: First-stage protector before DC-DC converter, absorbing lightning-induced surges coupled via Ethernet cables. Use Value: Limits clamped voltage to ≤27.7 V, ensuring downstream converters remain within absolute maximum ratings. |
Use Scenario: Guarding 4–20 mA current loop inputs against field wiring faults and ESD during maintenance. IC Role / Device Role: Bidirectional-capable variant not applicable; this unidirectional part used with series resistor and shunt Zener for asymmetric protection. Use Value: Enables <1 µA leakage at 24 V loop supply, preserving measurement accuracy while surviving ±2 kV contact ESD (IEC 61000-4-2). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A | DO-214AA (SMB) package; 20 V VBR min/max = 22.2–24.5 V; 600 W PPPM; RθJL = 25 °C/W. | Lower peak power and higher clamping voltage (32.4 V); suited for space-constrained PCBs where 1500 W is not required. | Select SMBJ20A only if board layout prohibits axial-leaded 1.5KE and system transients are limited to <600 W. |
| 1.5KE20A-E3/54 | Same electrical specs and 1.5KE package; RoHS-compliant but commercial-grade (non-AEC-Q101); HE3 suffix denotes AEC-Q101 qualification. | Lacks automotive qualification; acceptable for industrial/commercial use where AEC-Q101 is not mandated. | Choose 1.5KE20A-E3/54 for cost-sensitive non-automotive designs requiring identical clamping behavior and footprint. |
Compared with 1N6278AHE3_A/C, SMBJ20A offers smaller size but reduced surge handling and higher clamping, while 1.5KE20A-E3/54 matches performance exactly but lacks AEC-Q101 validation - making 1N6278AHE3_A/C the sole choice for automotive-qualified 20 V-class TVS in axial package.
Availability
1N6278AHE3_A/C is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and PLC analog input protection requiring stable component supply and AEC-Q101 assurance.
Supply support for 1N6278AHE3_A/C 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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive qualification.
The 1N6278AHE3_A/C belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure applications demanding AEC-Q101 compliance and 1500 W surge capability.
FAQ
What is the breakdown voltage tolerance for 1N6278AHE3_A/C?
The 1N6278AHE3_A/C has a specified breakdown voltage (VBR) range of 19.0 V minimum to 21.0 V maximum at 1.0 mA test current, per Vishay Document #88301. This ±5.3% tolerance ensures predictable clamping onset while accommodating process variation. The 1N6278AHE3_A/C is tested and binned to meet this specification at 25 °C ambient, with temperature coefficient of +0.090 %/°C applied above 25 °C.
Is 1N6278AHE3_A/C bidirectional or unidirectional?
The 1N6278AHE3_A/C is a unidirectional Transient Voltage Suppressor. Its polarity is marked by a cathode band on the body, and it conducts only when anode-to-cathode voltage exceeds VBR. Bidirectional variants in the same family use "CA" suffix (e.g., 1.5KE20CA); the "A" suffix in 1N6278AHE3_A/C confirms unidirectional construction per Vishay's ordering nomenclature and electrical characteristics table.
Does 1N6278AHE3_A/C meet AEC-Q101 qualification?
Yes, the "HE3" suffix in 1N6278AHE3_A/C explicitly denotes AEC-Q101 qualification, confirmed in Vishay Document #88301 (page 3, Note 2). This applies to the full 1.5KE6.8AHE3_B through 1.5KE220AHE3_B series, including 1N6278AHE3_A/C. Qualification covers HTRB, HTGB, temperature cycling, and mechanical shock tests per AEC-Q101 Rev D.
What is the clamping voltage of 1N6278AHE3_A/C at its rated peak pulse current?
The 1N6278AHE3_A/C clamps to a maximum of 27.7 V at its rated peak pulse current (IPPM) of 54.2 A, measured under the standard 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during surge events, directly supporting design margin calculations for downstream components.
Can 1N6278AHE3_A/C be used in parallel for higher surge capability?
Vishay documentation states TVS diodes "can also be used in series or parallel to increase the peak power ratings." However, for parallel use of 1N6278AHE3_A/C, matching VBR tolerances and thermal coupling are critical to ensure current sharing. Without binning or external balancing resistors, uneven stress may occur. System-level testing per IEC 61000-4-5 is required to validate performance when paralleling multiple 1N6278AHE3_A/C units.
1N6278AHE3_A/C 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):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 54.2A
- 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
1N6278AHE3_A/C FAQ
1.How can I place an order for 1N6278AHE3_A/C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6278AHE3_A/C 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 1N6278AHE3_A/C reliable?
The price and inventory of 1N6278AHE3_A/C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6278AHE3_A/C is usually 5 days.
3.What payment methods are accepted for 1N6278AHE3_A/C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6278AHE3_A/C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6278AHE3_A/C?
1N6278AHE3_A/C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6278AHE3_A/C 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 1N6278AHE3_A/C?
For technical support, including 1N6278AHE3_A/C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6278AHE3_A/C requirements.
6.How does Aetrix verify that 1N6278AHE3_A/C is sourced from the original manufacturer or authorized distributors?
All 1N6278AHE3_A/C 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 1N6278AHE3_A/C meets industry standards.
7.What is the process for return or replacement of 1N6278AHE3_A/C?
All 1N6278AHE3_A/C units undergo pre-shipment inspection (PSI). If there is an issue with 1N6278AHE3_A/C, 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 1N6278AHE3_A/C part is unused and in its original packaging.
Return procedure for 1N6278AHE3_A/C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6278AHE3_A/C Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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