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Vishay General Semiconductor - Diodes Division 1N6274AHE3/51
- Part No.:
- 1N6274AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1N6274AHE3/51.pdf
- Description:
- TVS DIODE 11.1VWM 137VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,896
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Product details
Overview
1N6274AHE3/51 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 12.4 V to 13.7 V breakdown voltage range at 1.0 mA test current, 11.1 V maximum stand-off voltage, 18.2 V clamping voltage at 82.4 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 µs waveform - deployed in automotive power supply inputs and industrial sensor interface circuits.
For engineers reviewing the 1N6274AHE3/51 datasheet, 1N6274AHE3/51 pinout, 1N6274AHE3/51 application, or 1N6274AHE3/51 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance data, JEDEC 1.5KE package dimensions, and real-world protection use cases - all confirmed from Vishay's official Document Number 88301 (Rev. 11-Oct-16).
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ reverse leakage at 11.1 V), but triggers into low-impedance conduction within <1 ns when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and low incremental surge resistance.
The device is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine), supports 175 °C maximum junction temperature, and exhibits +0.081 %/°C temperature coefficient of VBR - enabling predictable clamping behavior across automotive-grade thermal ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 12.4 V to 13.7 V at 1.0 mA - defines precise voltage threshold where clamping begins; critical for matching protected IC's absolute maximum rating. |
| Stand-off Voltage VWM | 11.1 V max - ensures no conduction during normal operation; provides 0.9 V margin below minimum VBR for reliable blocking. |
| Clamping Voltage VC | 18.2 V at 82.4 A IPPM - limits transient voltage seen by downstream circuitry; determines survivability of 15 V-rated components. |
| Peak Pulse Power PPPM | 1500 W (10/1000 µs) - sustains high-energy surges common in automotive load-dump or inductive switching events. |
| Junction Temperature Range | –55 °C to +175 °C - enables deployment in under-hood automotive ECUs and industrial motor drives without derating. |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT. |
| Package | JEDEC 1.5KE case - axial-leaded, epoxy-molded body meeting UL 94 V-0; compatible with wave soldering (275 °C, 10 s max). |
Pinout & Package
1N6274AHE3/51 uses the standard JEDEC 1.5KE axial package: cylindrical epoxy body with matte tin-plated leads. The cathode is marked by a color band on the body end; polarity must be observed in series connection with protected circuitry.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or low-side return path; forms shunt path for negative transients in bi-directional configurations (not applicable here - uni-directional only). |
| Cathode | Current exit point during forward conduction; marked with band | Connected to protected line (e.g., 12 V rail); conducts surge current to ground when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Ensures stable VBR over time and temperature; eliminates risk of junction degradation under repeated surge stress. |
| 1500 W peak pulse power (10/1000 µs) | Handles automotive load-dump pulses (ISO 7637-2 Pulse 5a) without failure; exceeds typical 1000 W requirement. |
| AEC-Q101 qualification | Validated for automotive under-hood applications including temperature cycling, humidity bias, and high-temperature operating life. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage stress on protected ICs - e.g., keeps 15 V logic inputs below 18.2 V during worst-case surge. |
| RoHS-compliant HE3 suffix | Meets JESD 201 Class 2 whisker resistance; suitable for high-reliability industrial and automotive production. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V battery-fed ECU power rail exposed to ISO 7637-2 load-dump transients up to 60 V/100 ms. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between VIN and GND; clamps within <1 ns to limit voltage excursion. Use Value: Prevents latch-up or gate oxide rupture in PMICs and microcontrollers by holding rail voltage ≤18.2 V during 82.4 A surge. |
Use Scenario: 4–20 mA current-loop sensor output connected to PLC analog input, subject to field-induced EFT bursts. IC Role / Device Role / Timing Role: Uni-directional TVS placed across signal and return lines; blocks positive transients while preserving loop integrity. Use Value: Maintains signal accuracy by limiting transient-induced offset shift; withstands >10,000 surges per IEC 61000-4-4 Level 4. |
| Consumer Power Adapter Output Protection | Telecom DC Feeder Line Protection |
Use Scenario: 5 V/3.3 V USB-C PD adapter output feeding portable medical monitors with sensitive ADC front-ends. IC Role / Device Role / Timing Role: Final-stage overvoltage clamp before LDO regulator; activated only during fault conditions. Use Value: Eliminates need for secondary crowbar circuitry; reduces BOM count while achieving <100 ns response to 1 kV ESD events. |
Use Scenario: –48 V DC telecom feeder line powering remote radio units, exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary surge diverter mounted at cabinet entry point; coordinated with gas discharge tube (GDT) upstream. Use Value: Absorbs first 1500 W of surge energy before GDT fires; extends system-level surge lifetime by >5× vs. GDT-only protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ13A | DO-214AA package; 13.0 V nominal VBR; 200 W PPPM (lower energy handling) | Surface-mount alternative for space-constrained PCBs; unsuitable for 1500 W load-dump events | Select when board area is limited and surge energy is ≤200 W (e.g., low-power IoT nodes). |
| 1.5KE13A-E3/54 | Same 1.5KE package and electrical specs; HE3 suffix denotes AEC-Q101 qualification, E3 does not | Commercial-grade variant lacking automotive qualification; identical performance in benign environments | Choose for cost-sensitive industrial controls where AEC-Q101 is not mandated. |
Compared with SMBJ13A and 1.5KE13A-E3/54, the 1N6274AHE3/51 uniquely combines 1500 W surge capacity, AEC-Q101 qualification, and axial-leaded 1.5KE packaging - making it the only option among the three qualified for under-hood automotive deployment with full load-dump immunity.
Availability
1N6274AHE3/51 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power feeders requiring stable component supply with guaranteed AEC-Q101 compliance and long-term lifecycle support.
Supply support for 1N6274AHE3/51 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability and automotive-grade validation.
The 1N6274AHE3/51 belongs to Vishay's TRANSZORB® TVS family - engineered specifically for robust, millisecond-scale transient suppression in harsh environments including automotive, industrial, and telecom infrastructure.
FAQ
What is the exact breakdown voltage range for 1N6274AHE3/51?
The 1N6274AHE3/51 has a guaranteed breakdown voltage (VBR) range of 12.4 V to 13.7 V at a test current of 1.0 mA, as specified in Vishay Document 88301. This tight tolerance ensures consistent clamping behavior across production lots and supports precise coordination with downstream overvoltage thresholds in protected circuits.
Is 1N6274AHE3/51 suitable for automotive applications?
Yes, the 1N6274AHE3/51 is AEC-Q101 qualified per Vishay's documentation and rated for operation from –55 °C to +175 °C. Its 1500 W peak pulse power rating and fast <1 ns response make it appropriate for protecting automotive ECUs against load-dump and ISO 7637-2 transients.
What does the "HE3/51" suffix mean in 1N6274AHE3/51?
The "HE3" suffix indicates RoHS compliance and AEC-Q101 qualification with JESD 201 Class 2 whisker resistance; "/51" denotes packaging in 13" paper tape and reel with 1400 units per reel. This distinguishes it from commercial-grade variants like 1.5KE13A-E3/54.
How does the clamping voltage of 1N6274AHE3/51 compare to its breakdown voltage?
The 1N6274AHE3/51 clamps to 18.2 V at its rated peak pulse current of 82.4 A, yielding a clamping ratio (VC/VBR) of approximately 1.42. This low ratio ensures minimal overvoltage stress on protected components - for example, keeping a 15 V-rated IC safely below its absolute maximum rating during surge events.
Can 1N6274AHE3/51 be used in bi-directional protection circuits?
No, the 1N6274AHE3/51 is a uni-directional TVS diode, identifiable by its cathode band marking. For bi-directional applications, Vishay specifies part numbers with "CA" suffixes (e.g., 1.5KE13CA), which provide symmetrical clamping in both polarities - a function not supported by the 1N6274AHE3/51.
1N6274AHE3/51 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:
- -
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 11.1V
- Voltage - Breakdown (Min):
- 12.4V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- Current - Peak Pulse (10/1000µs):
- 82.4A
- 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
1N6274AHE3/51 FAQ
1.How can I place an order for 1N6274AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6274AHE3/51 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 1N6274AHE3/51 reliable?
The price and inventory of 1N6274AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6274AHE3/51 is usually 5 days.
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1N6274AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6274AHE3/51 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 1N6274AHE3/51?
For technical support, including 1N6274AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6274AHE3/51 requirements.
6.How does Aetrix verify that 1N6274AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1N6274AHE3/51 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 1N6274AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1N6274AHE3/51?
All 1N6274AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6274AHE3/51, 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 1N6274AHE3/51 part is unused and in its original packaging.
Return procedure for 1N6274AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6274AHE3/51 Tags
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