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Vishay General Semiconductor - Diodes Division 1N6291AHE3/51
- Part No.:
- 1N6291AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1N6291AHE3/51.pdf
- Description:
- TVS DIODE 58.1VWM 92VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,648
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Product details
Overview
1N6291AHE3/51 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 64.6 V minimum breakdown voltage (VBR), 58.1 V maximum stand-off 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 AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the 1N6291AHE3/51 datasheet, 1N6291AHE3/51 pinout, 1N6291AHE3/51 application, or 1N6291AHE3/51 equivalent, this device is selected for robust ESD and surge protection in automotive ECUs, industrial PLC I/O modules, and telecom power interfaces where fast clamping (<1 ns), low leakage (<1 µA at VWM), and stable thermal performance up to +175 °C junction temperature are required.
Technical Context
This TVS diode employs a glass-passivated silicon junction optimized for uni-directional transient suppression. Its clamping behavior follows a well-defined incremental voltage curve (ΔVC = VC − VBR) with low dynamic impedance, enabling precise voltage limiting during 10/1000 µs surges. The device operates within a −55 °C to +175 °C junction temperature range and exhibits a positive temperature coefficient of VBR (+0.104 %/°C).
Thermal design is supported by RθJA = 75 °C/W (junction-to-ambient) and RθJL = 15.4 °C/W (junction-to-lead), allowing effective heat dissipation through PCB copper and lead frames. It complies with JESD 22-B106 (275 °C solder dip, 10 s) and JESD 201 Class 2 whisker resistance (HE3 suffix).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V at 1.0 mA test current - defines reliable conduction onset under transient stress |
| VWM | 58.1 V maximum - ensures no conduction during normal 54 V nominal rail operation |
| VC @ IPPM | 92.0 V at 16.3 A - limits downstream voltage to safe levels during 1500 W surge events |
| PPPM | 1500 W (10/1000 µs waveform) - sustains high-energy transients without failure |
| IFSM | 200 A (8.3 ms half-sine) - withstands repetitive inrush or fault currents in power circuits |
| TJ max. | +175 °C - enables use in under-hood automotive and high-temperature industrial environments |
| Leakage @ VWM | <1.0 µA - prevents measurable power loss or signal distortion in standby or low-power modes |
Pinout & Package
Package: DO-201AD (Case Style 1.5KE), axial-leaded, epoxy-molded body meeting UL 94 V-0 flammability rating. Matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry terminal in forward bias | Connected to lower-potential side (e.g., GND or return path) in uni-directional clamp configuration |
| Cathode (banded end) | Current exit terminal in forward bias; clamping node in reverse bias | Connected to protected line (e.g., 48 V supply rail); conducts surge current to ground when VIN exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under humidity and thermal cycling |
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS power domains |
| 1500 W peak pulse power | Protects against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 surges without derating |
| Sub-nanosecond response time | Clamps transients before sensitive ICs experience overstress - critical for protecting CAN, LIN, and sensor interfaces |
| RoHS-compliant HE3 suffix | Meets JESD 201 Class 2 whisker resistance and automotive supply chain material compliance requirements |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs from load dump and alternator switching transients per ISO 16750-2. IC Role / Device Role / Timing Role: Primary shunt clamping element placed between power input and chassis ground. Use Value: Limits transient voltage to ≤92.0 V, preventing damage to 65 V-rated DC-DC controllers and microcontrollers. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to inductive kickback from solenoids and relays. IC Role / Device Role / Timing Role: Fast-acting voltage clamp on field-side signal traces before optocoupler or Schmitt trigger inputs. Use Value: Responds in <1 ns to suppress >1 kV spikes, eliminating false triggering and extending input circuit lifetime. |
| Telecom DC Power Interface | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding PoE-powered equipment front-end rectifiers and DC-DC stages from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-line defense on 57 V nominal DC input, coordinated with upstream fuses and secondary TVS arrays. Use Value: Absorbs 1500 W surges without degradation, maintaining system uptime in outdoor base station deployments. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, power tools). IC Role / Device Role / Timing Role: Uni-directional clamp across motor terminals or H-bridge supply rails. Use Value: Prevents gate oxide rupture in MOSFET drivers and resets MCU watchdogs triggered by EMI-induced resets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64A-E3/52 (Vishay) | Lower PPPM (600 W), smaller SMB package (3.5 mm x 3.5 mm), VC = 103 V @ 5.8 A | Better suited for space-constrained PCBs with moderate surge exposure (IEC 61000-4-5 Level 3) | Select when board area is limited and peak surge energy is ≤600 W; verify thermal margin due to higher RθJA |
| 1.5KE68AHE3/54 (Vishay) | Same electrical specs and DO-201AD package; differs only in tape-and-reel packaging (54 vs. 51 base quantity) | Functionally identical; used interchangeably where reel size or logistics preference dictates | Choose 1.5KE68AHE3/54 for automated SMT placement with 1400-unit reels; 1N6291AHE3/51 uses 1000-unit reels |
Compared with SMBJ64A-E3/52, 1N6291AHE3/51 delivers 2.5× higher surge power handling and superior thermal robustness via axial leads, while 1.5KE68AHE3/54 offers identical protection performance with alternate packaging-making both viable depending on layout constraints and production workflow.
Availability
1N6291AHE3/51 is available at Aetrix Electronics and suitable for automotive ECU designs, industrial PLC I/O modules, and telecom DC power interfaces requiring stable component supply, AEC-Q101 compliance, and 1500 W surge immunity.
Supply support for 1N6291AHE3/51 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 application-specific performance.
The 1N6291AHE3/51 belongs to Vishay's TRANSZORB® TVS family, engineered for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom systems where failure is not an option.
FAQ
What is the clamping voltage of the 1N6291AHE3/51 and how does it protect downstream circuitry?
The 1N6291AHE3/51 has a maximum clamping voltage (VC) of 92.0 V at 16.3 A peak pulse current (10/1000 µs). This value represents the upper voltage limit imposed on the protected line during a surge event. By holding the voltage below 92.0 V, the 1N6291AHE3/51 prevents overstress on downstream components rated for ≤100 V operation-such as 65 V DC-DC controllers or automotive microcontrollers-ensuring functional integrity and long-term reliability.
Is the 1N6291AHE3/51 suitable for automotive applications, and what qualification does it hold?
Yes, the 1N6291AHE3/51 is explicitly qualified to AEC-Q101 for automotive use. Its HE3 suffix confirms compliance with JESD 201 Class 2 whisker resistance and RoHS requirements, and its operating junction temperature range (−55 °C to +175 °C) supports under-hood and transmission-control module deployments. The 1N6291AHE3/51 is routinely deployed in engine control units, body control modules, and ADAS power supplies per ISO 16750-2 load-dump immunity requirements.
How does the 1N6291AHE3/51 differ from bi-directional TVS diodes like 1N6291CAHE3/51?
The 1N6291AHE3/51 is a uni-directional TVS diode with polarity marking (cathode band), intended for DC rail protection where reverse voltage is blocked. In contrast, 1N6291CAHE3/51 is bi-directional-lacking polarity marking-and symmetrically clamps both positive and negative transients, making it suitable for AC lines or data buses like RS-485. Their VBR, VC, and PPPM values differ slightly due to structural asymmetry; the 1N6291AHE3/51 is not interchangeable with its CA variant without circuit redesign.
What is the maximum leakage current of the 1N6291AHE3/51 at its rated stand-off voltage?
The 1N6291AHE3/51 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its rated stand-off voltage (VWM = 58.1 V) and TA = 25 °C. This ultra-low leakage ensures minimal power loss in always-on systems and avoids signal integrity issues in high-impedance sensing paths-critical for battery-powered automotive modules and precision industrial analog front-ends where quiescent current budgets are tight.
Can the 1N6291AHE3/51 be used in parallel to increase surge current handling?
Yes, multiple 1N6291AHE3/51 devices can be paralleled to increase total surge current capacity, but only with careful attention to layout symmetry and thermal coupling. Matching VBR tolerances (±5 %) and minimizing trace inductance differences are essential to ensure current sharing. Vishay recommends using matched lots and verifying performance under actual surge conditions; unbalanced layouts may cause one device to absorb disproportionate energy and fail prematurely.
1N6291AHE3/51 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1N6291AHE3/51 FAQ
1.How can I place an order for 1N6291AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6291AHE3/51 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 1N6291AHE3/51 reliable?
The price and inventory of 1N6291AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6291AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1N6291AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6291AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6291AHE3/51?
1N6291AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6291AHE3/51 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 1N6291AHE3/51?
For technical support, including 1N6291AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6291AHE3/51 requirements.
6.How does Aetrix verify that 1N6291AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1N6291AHE3/51 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 1N6291AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1N6291AHE3/51?
All 1N6291AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6291AHE3/51, 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 1N6291AHE3/51 part is unused and in its original packaging.
Return procedure for 1N6291AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6291AHE3/51 Tags
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