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Vishay General Semiconductor - Diodes Division 1N6291A-E3/51
- Part No.:
- 1N6291A-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1N6291A-E3/51.pdf
- Description:
- TVS DIODE 58.1VWM 92VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,984
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Product details
Overview
1N6291A-E3/51 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 64.6 V to 71.4 V breakdown voltage (VBR), 58.1 V standoff voltage (VWM), 92.0 V clamping voltage (VC) at 16.3 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs), and operates across -55 °C to +175 °C junction temperature range - deployed in automotive power supply inputs and industrial sensor interface protection.
For engineers reviewing the 1N6291A-E3/51 datasheet, 1N6291A-E3/51 pinout, 1N6291A-E3/51 application, or 1N6291A-E3/51 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, clamping behavior under surge conditions, thermal resistance data, and direct alternatives for ESD/lightning transient suppression in DC power systems.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction optimized for fast response (<1 ns) and low incremental surge resistance. Its 1500 W peak pulse power handling (10/1000 µs waveform) and 16.3 A IPPM are defined at TA = 25 °C with derating above 25 °C per Fig. 2 of the datasheet.
The device exhibits a maximum reverse leakage of 1.0 µA at VWM = 58.1 V and a typical thermal resistance of 15.4 °C/W (junction-to-lead), enabling reliable operation without heatsinking in moderate-duty-cycle surge environments. Polarity is marked by a cathode band on the molded epoxy body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V - ensures reliable conduction onset above normal operating voltage while avoiding false triggering |
| VWM | 58.1 V - maximum continuous reverse working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 92.0 V at 16.3 A - clamped voltage during 10/1000 µs surge, limiting downstream component stress |
| PPPM | 1500 W - peak transient energy absorption capability for lightning or inductive switching events |
| TJ max. | +175 °C - supports under-hood automotive and high-ambient industrial deployments |
| RθJL | 15.4 °C/W - enables direct PCB trace heat sinking without external heatsink in most applications |
| Package | JEDEC 1.5KE - axial-leaded, RoHS-compliant molded epoxy case rated UL 94 V-0 |
Pinout & Package
Package: JEDEC Case Style 1.5KE - axial-leaded, molded epoxy body with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential side (e.g., GND) in unidirectional clamp configuration |
| Cathode | Current exit point during reverse-biased clamping | Connected to protected line (e.g., 48 V rail); color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling |
| 1500 W peak pulse power (10/1000 µs) | Handles automotive load-dump transients (ISO 7637-2 Pulse 5a) without degradation |
| Clamping response time < 1 ns | Protects fast-switching MOSFET gates and MCU I/O pins before damage occurs |
| UL 94 V-0 molding compound | Meets flame-retardancy requirements for industrial control cabinet installations |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance for lead-free reflow assembly |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
|
Use Scenario: 12 V/24 V battery-fed ECUs exposed to ISO 7637-2 load dump and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to shunt transient energy before it reaches DC-DC converters. Use Value: Clamps 92.0 V at 16.3 A, limiting input voltage to safe levels for 36 V-rated regulators and preventing latch-up in microcontrollers. |
Use Scenario: 4–20 mA current loop sensors in factory automation subject to ESD and cable-induced transients. IC Role / Device Role / Timing Role: TVS mounted across sensor output terminals to suppress ±8 kV contact ESD (IEC 61000-4-2) and inductive kickback. Use Value: Sub-1 ns response prevents >5 V excursion on analog front-end op-amps, preserving measurement integrity. |
| Telecom DC Power Feeder Protection | Consumer Appliance Motor Drive Supply Clamp |
|
Use Scenario: Remote radio unit (RRU) power feeds over long cables susceptible to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-stage TVS on -48 V telecom supply rail, coordinated with upstream MOVs for staged protection. Use Value: 1500 W rating sustains multiple 10/1000 µs impulses per IEC 61000-4-5 Level 4, reducing field failure rates. |
Use Scenario: Brushed DC motor controllers in home appliances where commutation spikes exceed 100 V. IC Role / Device Role / Timing Role: TVS connected across H-bridge supply rails to clamp inductive flyback voltage during PWM switching. Use Value: 175 °C max junction temperature allows placement near hot motor drivers without thermal derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ64A | Same 64 V VBR range but SMC package (surface-mount); 1000 W PPPM; RθJA = 40 °C/W | Requires PCB real estate optimization; better suited for automated assembly than axial leads | Select when board space is constrained and reflow compatibility is required over through-hole mounting |
| ON Semiconductor 1.5KE68A | Identical electrical specs (64.6–71.4 V VBR, 92.0 V VC), same 1.5KE package, but commercial-grade only (no AEC-Q101 option) | No automotive qualification path; identical performance in non-automotive industrial use | Choose for cost-sensitive non-automotive designs where AEC-Q101 is not mandated |
Compared with Littelfuse SMAJ64A, 1N6291A-E3/51 offers higher surge power (1500 W vs. 1000 W) and superior thermal dissipation via lead termination; versus ON Semi 1.5KE68A, it provides identical clamping performance with Vishay's AEC-Q101 qualified variants available in HE3 suffix versions for automotive programs.
Availability
1N6291A-E3/51 is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor interface clamping, and telecom DC feeder surge suppression requiring stable component supply across extended production lifecycles.
Supply support for 1N6291A-E3/51 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, and protection devices with emphasis on reliability and AEC-Q101 qualification.
The 1N6291A-E3/51 belongs to Vishay's TRANSZORB® TVS family, engineered specifically for robust transient suppression in harsh environments including automotive, industrial, and telecom infrastructure.
FAQ
What is the breakdown voltage tolerance for 1N6291A-E3/51?
The 1N6291A-E3/51 has a specified breakdown voltage range of 64.6 V to 71.4 V at 1.0 mA test current (IT), corresponding to a ±5% tolerance around the nominal 68 V rating. This tight VBR window ensures predictable clamping onset without premature conduction during normal operation. The value is measured per JEDEC standard and confirmed in the Vishay 88301 datasheet revision 09-Aug-2022.
Is 1N6291A-E3/51 RoHS compliant and lead-free?
Yes, the 1N6291A-E3/51 carries the E3 suffix, indicating full RoHS compliance per Directive 2011/65/EU and exemption 7a. Its matte tin-plated leads meet J-STD-002 solderability requirements and JESD 201 Class 1A whisker resistance testing. The molded epoxy body is halogen-free and UL 94 V-0 rated, making 1N6291A-E3/51 suitable for environmentally regulated industrial and consumer applications.
Can 1N6291A-E3/51 be used in bidirectional configurations?
No, 1N6291A-E3/51 is strictly a unidirectional TVS diode, as indicated by its "A" suffix and cathode band marking. Bidirectional variants in the same family use the "CA" suffix (e.g., 1.5KE68CA). Using 1N6291A-E3/51 in reverse-biased AC applications would result in forward conduction and potential failure. For bidirectional protection at ~68 V, specify 1.5KE68CA or equivalent.
What is the maximum clamping voltage of 1N6291A-E3/51 under surge conditions?
The maximum clamping voltage (VC) of 1N6291A-E3/51 is 92.0 V at 16.3 A peak pulse current (IPPM) using the standardized 10/1000 µs waveform. This value is guaranteed across the operating temperature range and defines the upper voltage limit imposed on protected circuitry during transient events. It is measured per ANSI/IEEE C62.35 and documented in Table 1 of the Vishay 88301 datasheet.
Does 1N6291A-E3/51 meet AEC-Q101 qualification?
The base 1N6291A-E3/51 is commercial-grade; however, Vishay offers the AEC-Q101 qualified version as 1N6291AHE3_B (or 1.5KE68AHE3_B), which shares identical electrical characteristics but undergoes additional stress testing per AEC-Q101 Rev D. For automotive applications requiring qualification, specify the HE3_B variant - the 1N6291A-E3/51 itself is not AEC-Q101 certified, though it is manufactured on the same qualified process.
1N6291A-E3/51 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):
- 58.1V
- Voltage - Breakdown (Min):
- 64.6V
- Voltage - Clamping (Max) @ Ipp:
- 92V
- Current - Peak Pulse (10/1000µs):
- 16.3A
- 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
1N6291A-E3/51 FAQ
1.How can I place an order for 1N6291A-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6291A-E3/51 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 1N6291A-E3/51 reliable?
The price and inventory of 1N6291A-E3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6291A-E3/51 is usually 5 days.
3.What payment methods are accepted for 1N6291A-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6291A-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6291A-E3/51?
1N6291A-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6291A-E3/51 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 1N6291A-E3/51?
For technical support, including 1N6291A-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6291A-E3/51 requirements.
6.How does Aetrix verify that 1N6291A-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1N6291A-E3/51 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 1N6291A-E3/51 meets industry standards.
7.What is the process for return or replacement of 1N6291A-E3/51?
All 1N6291A-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6291A-E3/51, 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 1N6291A-E3/51 part is unused and in its original packaging.
Return procedure for 1N6291A-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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