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Vishay General Semiconductor - Diodes Division 1N6277AHE3/51
- Part No.:
- 1N6277AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1N6277AHE3/51.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,389
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Product details
Overview
1N6277AHE3/51 from Vishay General Semiconductor is a uni-directional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 17.1 V to 18.9 V breakdown voltage (VBR) at 1.0 mA test current, 15.3 V maximum stand-off voltage (VWM), 1.0 µA max reverse leakage at VWM, 59.5 A peak pulse current (IPPM) under 10/1000 µs waveform, and clamps to 25.2 V at rated surge current. It is used in automotive power supply inputs and industrial sensor interfaces where fast, robust ESD and lightning surge immunity is required.
For engineers reviewing the 1N6277AHE3/51 datasheet, 1N6277AHE3/51 pinout, 1N6277AHE3/51 application, or 1N6277AHE3/51 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), JEDEC 1.5KE package dimensions, and real-world design implications for transient suppression in 12 V–24 V systems.
Technical Context
This device operates as a uni-directional avalanche diode with glass-passivated junction, delivering sub-nanosecond response time (<1 ns) to transients. Its clamping behavior follows a well-defined incremental voltage curve (ΔVC = VC − VBR) with low dynamic impedance, enabling precise voltage limiting during 1500 W peak pulses.
Rated for operation from −55 °C to +175 °C junction temperature, it supports high-reliability applications via AEC-Q101 qualification (applied to HE3 suffix variants), JESD201 Class 2 whisker resistance, and UL 94 V-0 compliant epoxy molding. The 1.5KE case provides mechanical robustness and thermal path optimization via 15.4 °C/W junction-to-lead resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 17.1 V / 18.9 V at IT = 1.0 mA - defines minimum guaranteed conduction threshold and maximum variation band for production screening |
| VWM | 15.3 V - maximum continuous reverse operating voltage before significant leakage; sets safe DC bias margin below breakdown |
| IPPM | 59.5 A (10/1000 µs) - peak surge current capability determines protection level against IEC 61000-4-5 Level 4 surges |
| VC | 25.2 V at IPPM - clamping voltage seen by protected circuit; must be below IC absolute maximum ratings |
| PPPM | 1500 W - peak pulse power rating confirms suitability for high-energy transients like automotive load dump |
| TJ max | +175 °C - enables use in under-hood automotive environments without derating penalties up to ambient 125 °C |
| RθJA | 75 °C/W - thermal resistance from junction to ambient; informs heatsinking requirements for repetitive surge duty |
Pinout & Package
Package: JEDEC 1.5KE molded epoxy case (Case Style 1.5KE), axial leaded, RoHS-compliant matte tin plating, 0.375" (9.5 mm) lead length standard. Dimensions: 5.3 mm × 5.3 mm body, 9.5 mm overall length, 1.07 mm lead diameter.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / cathode-referenced clamp node | Connected to protected line; conducts during positive transients when cathode is held at higher potential |
| Cathode | Reference terminal / clamping return path | Typically tied to system ground or lower-potential rail; establishes polarity-sensitive clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, repeatable avalanche characteristics across temperature and lifetime; eliminates surface degradation risks |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD; supports PPAP documentation |
| 1500 W peak pulse power (10/1000 µs) | Provides single-event protection against ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 combination wave surges |
| Sub-nanosecond response time | Clamps transients before sensitive downstream ICs experience overstress-critical for protecting CAN/LIN transceivers and microcontrollers |
| JESD201 Class 2 whisker resistance | Ensures long-term solder joint integrity in high-vibration environments such as engine control units and ADAS modules |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: 12 V battery-fed ECUs exposed to load dump transients up to 60 V and ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Primary shunt TVS placed upstream of DC-DC converter input to clamp surges before regulation stage. Use Value: Limits voltage to ≤25.2 V during 59.5 A surge, preventing damage to buck controller ICs rated for 36 V absolute max input. |
Use Scenario: 4–20 mA current loop sensors in factory automation subject to cable-induced ESD and inductive switching noise. IC Role / Device Role / Timing Role: Uni-directional TVS connected between signal line and local ground to suppress negative-going transients on analog inputs. Use Value: Clamps −25.2 V excursions within 1 ns, preserving ADC front-end integrity and avoiding latch-up in precision op-amps. |
| Telecom DC Power Feeds | Consumer Device USB Port Protection |
|
Use Scenario: Central office power distribution feeding remote DSLAMs over long copper pairs vulnerable to lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-level TVS on −48 V DC feed lines, coordinated with gas discharge tubes for staged protection. Use Value: Handles 1500 W pulses without thermal runaway, maintaining clamping performance after repeated 10/1000 µs events per IEC 61000-4-5. |
Use Scenario: USB 2.0 data lines and VBUS in portable audio devices subjected to human-body-model ESD events. IC Role / Device Role / Timing Role: Standoff-rated TVS on VBUS line to absorb 8 kV contact ESD while minimizing capacitance impact on signal integrity. Use Value: 15.3 V VWM allows full 5.5 V USB operation; 25.2 V clamping prevents overvoltage damage to USB switch ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | DO-214AA package (SMB), 18 V nominal VBR, 1000 W PPPM, RθJA = 50 °C/W | Lower peak power rating; better thermal dissipation in PCB space-constrained layouts | Select SMBJ18A when board area is limited and surge energy is ≤1000 W; not suitable for automotive load dump compliance. |
| 1.5KE18AHE3_A | Same 1.5KE package, identical VBR/VC/PPPM, but base part number uses different revision coding (A vs 51 tape/reel variant) | No functional difference; differs only in packaging configuration (tape-and-reel quantity and reel size) | 1.5KE18AHE3_A is functionally identical to 1N6277AHE3/51 and may be substituted with no design change if reel logistics align. |
Compared with SMBJ18A, 1N6277AHE3/51 delivers 50 % higher surge power handling and AEC-Q101 validation for automotive use, while 1.5KE18AHE3_A offers identical electrical and mechanical performance with alternate packaging-making it a direct form-fit-function match for production continuity.
Availability
1N6277AHE3/51 is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interface protection, and telecom DC feed applications requiring stable component supply, AEC-Q101 qualification, and 1500 W transient immunity.
Supply support for 1N6277AHE3/51 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade qualification.
The 1N6277AHE3/51 belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh environments-including under-hood automotive, industrial controls, and infrastructure power systems.
FAQ
What is the breakdown voltage tolerance of the 1N6277AHE3/51?
The 1N6277AHE3/51 has a specified breakdown voltage range of 17.1 V to 18.9 V at 1.0 mA test current, representing ±5.5 % tolerance around the nominal 18 V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports reliable margining against downstream IC voltage limits in designs using the 1N6277AHE3/51.
Is the 1N6277AHE3/51 suitable for automotive applications?
Yes-the 1N6277AHE3/51 carries the HE3 suffix, confirming AEC-Q101 qualification per Vishay's documentation (Document 88301, Note 2). It is validated for temperature cycling, high-temperature operating life, and ESD robustness required in automotive ECUs, body control modules, and ADAS subsystems where the 1N6277AHE3/51 serves as primary overvoltage protection.
What is the maximum clamping voltage of the 1N6277AHE3/51 under surge conditions?
The 1N6277AHE3/51 clamps to a maximum of 25.2 V when subjected to its rated 59.5 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured at the device terminals and represents the worst-case voltage imposed on the protected circuit during a full-power transient event involving the 1N6277AHE3/51.
How does the 1N6277AHE3/51 differ from bi-directional TVS diodes like 1N6277CA?
The 1N6277AHE3/51 is uni-directional and features a cathode band marking; it conducts only during reverse-biased overvoltage events. In contrast, 1N6277CA is bi-directional with no polarity marking and clamps both positive and negative transients symmetrically. The 1N6277AHE3/51 is selected when protection is needed on a referenced DC rail, whereas the CA version suits AC-coupled or floating signal lines.
What is the thermal resistance of the 1N6277AHE3/51 and how does it affect layout?
The 1N6277AHE3/51 has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W. This value assumes standard JEDEC test conditions (single device on FR-4, 1 in² copper pad). Layouts requiring repetitive surge handling should increase copper area and consider thermal vias-since each watt of average dissipation raises junction temperature by 75 °C above ambient, directly impacting long-term reliability of the 1N6277AHE3/51.
1N6277AHE3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.2V
- Current - Peak Pulse (10/1000µs):
- 59.5A
- 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
1N6277AHE3/51 FAQ
1.How can I place an order for 1N6277AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6277AHE3/51 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 1N6277AHE3/51 reliable?
The price and inventory of 1N6277AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6277AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1N6277AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6277AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6277AHE3/51?
1N6277AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6277AHE3/51 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 1N6277AHE3/51?
For technical support, including 1N6277AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6277AHE3/51 requirements.
6.How does Aetrix verify that 1N6277AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1N6277AHE3/51 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 1N6277AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1N6277AHE3/51?
All 1N6277AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6277AHE3/51, 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 1N6277AHE3/51 part is unused and in its original packaging.
Return procedure for 1N6277AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6277AHE3/51 Tags
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