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Vishay General Semiconductor - Diodes Division 1N6294HE3/73
- Part No.:
- 1N6294HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1N6294HE3/73.pdf
- Description:
- TVS DIODE 73.7VWM 131VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:3,495
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Product details
Overview
1N6294HE3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in DC power rails and signal lines. It features a 91 V breakdown voltage (VBR = 86.5–95.5 V at 1 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 125 V at 12 A, and operates across –55 °C to +175 °C junction temperature. It is used to protect MOSFETs, ICs, and sensor interfaces against lightning-induced transients and inductive switching spikes.
For engineers reviewing the 1N6294HE3/73 datasheet, 1N6294HE3/73 pinout, 1N6294HE3/73 application, or 1N6294HE3/73 equivalent, this part serves as a RoHS-compliant, AEC-Q101-qualified transient suppressor with verified 1.5KE package mechanical form, JEDEC-standardized thermal performance, and documented clamping behavior under repetitive 10/1000 µs surges - critical for automotive power supply and industrial I/O protection design.
Technical Context
The 1N6294HE3/73 employs a glass-passivated silicon junction optimized for fast response (<1 ns) and low incremental surge resistance. Its unidirectional polarity enables cathode-referenced clamping on positive-going transients, with a maximum reverse leakage current of 1.0 µA at 77.8 V stand-off voltage (VWM).
It delivers 12 A peak pulse current (IPPM) under standardized 10/1000 µs waveform conditions, with thermal resistance of 15.4 °C/W (junction-to-lead) and 75 °C/W (junction-to-ambient), enabling reliable operation without forced cooling in PCB-mounted applications up to 6.5 W continuous dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at 1.0 mA test current - defines precise clamping onset threshold for overvoltage detection |
| VWM | 77.8 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 125 V at 12 A - actual clamped voltage during worst-case 1500 W transient, limiting downstream stress |
| PPPM | 1500 W - peak surge power handling capability per 10/1000 µs waveform, validated per R.E.A. standards |
| IFSM | 200 A - non-repetitive forward surge rating (8.3 ms half-sine), supporting inrush and fault-current events |
| TJ range | –55 °C to +175 °C - extended thermal envelope suitable for under-hood automotive and industrial environments |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with matte tin-plated leads, UL 94 V-0 compliant molding |
Pinout & Package
1N6294HE3/73 uses the standard DO-201AD (Case Style 1.5KE) axial package: cylindrical epoxy body with two radial leads. The cathode is marked by a color band on the body; lead length is 0.375" (9.5 mm), diameter 0.042" (1.07 mm). Leads are matte tin-plated and solderable per J-STD-002/JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to lower-potential side (e.g., ground or return rail); conducts during positive transients when cathode is biased higher |
| Cathode | Clamping reference node | Connected to protected line (e.g., 12 V rail); initiates avalanche breakdown when voltage exceeds VBR, shunting surge to anode |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress |
| AEC-Q101 qualification | Validated for automotive-grade use including temperature cycling, HTRB, and surge endurance per stress test plan |
| 1500 W 10/1000 µs rating | Supports protection of 12 V/24 V systems against ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 Level 3 surges |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage exposure to downstream components while maintaining margin above VWM |
| JESD 201 Class 2 whisker resistance | HE3 suffix confirms enhanced mitigation of tin whisker growth, critical for long-life industrial and automotive deployments |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients per ISO 16750-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp positive surges above 77.8 V. Use Value: Limits peak voltage to 125 V during 12 A transients, preventing damage to 36 V-rated DC-DC controllers and CAN transceivers. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted at connector entry point to divert sub-100 ns ESD pulses away from ADC inputs. Use Value: Sub-1 ns response ensures clamping occurs before sensitive front-end op-amps saturate, preserving signal integrity. |
| Telecom Line Card Surge Suppression | Consumer Power Adapter Input Protection |
Use Scenario: Safeguarding PoE-powered Ethernet ports against induced lightning surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on DC input side of isolated DC-DC converter, coordinated with secondary-side MOVs. Use Value: 1500 W rating handles 10/1000 µs surges up to 1 kV common-mode, meeting GR-1089-CORE Level 3 requirements. |
Use Scenario: Overvoltage protection on AC/DC adapter primary rectifier output before bulk capacitor. IC Role / Device Role / Timing Role: Fast-acting unidirectional suppressor absorbing turn-on spikes from bridge rectifier and transformer leakage inductance. Use Value: Clamps 91 V nominal breakdown to 125 V at 12 A, preventing overstress of 200 V-rated electrolytic capacitors and controller ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A | DO-214AA package (SMB), 90 V VBR, 600 W PPPM, 100 A IPPM (at 10/1000 µs) | Lower power rating and surface-mount format - suited for space-constrained PCBs but requires derating for 1500 W events | Select SMBJ90A only when board area is limited and peak surge energy is ≤600 W; not drop-in for 1N6294HE3/73 in high-energy automotive or telecom roles. |
| 1.5KE91A-E3/54 | Same 1.5KE package and electrical specs, but commercial-grade (non-AEC-Q101) and JESD 201 Class 1A whisker rating (E3 vs HE3) | Lacks automotive qualification and reduced whisker resistance - acceptable for consumer/industrial use where AEC-Q101 is not mandated | Choose 1.5KE91A-E3/54 for cost-sensitive, non-automotive designs requiring identical clamping performance and through-hole mounting. |
Compared with SMBJ90A and 1.5KE91A-E3/54, the 1N6294HE3/73 uniquely combines AEC-Q101 qualification, JESD 201 Class 2 whisker resistance, and full 1500 W surge capability in the proven 1.5KE axial package - making it the preferred choice for mission-critical automotive and industrial power rail protection where long-term reliability under thermal and mechanical stress is mandatory.
Availability
1N6294HE3/73 is available at Aetrix Electronics and suitable for automotive ECU power management, industrial sensor interface protection, and telecom line card surge suppression requiring stable component supply, traceable sourcing, and lifecycle continuity.
Supply support for 1N6294HE3/73 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, ruggedness, and application-specific validation.
The 1N6294HE3/73 belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes must be eliminated through robust silicon design and rigorous qualification.
FAQ
What is the breakdown voltage tolerance of the 1N6294HE3/73?
The 1N6294HE3/73 has a specified breakdown voltage range of 86.5 V to 95.5 V at 1.0 mA test current, representing ±5% tolerance around the nominal 91 V rating. This tight VBR window ensures consistent clamping onset across production lots and supports predictable coordination with downstream overvoltage protection circuits in designs using the 1N6294HE3/73.
Is the 1N6294HE3/73 suitable for bidirectional transient suppression?
No, the 1N6294HE3/73 is a unidirectional TVS diode, indicated by the "A" suffix and absence of "CA" in its designation. It clamps only positive transients relative to its cathode. For bidirectional protection, Vishay offers variants such as 1N6294CA or 1.5KE91CA - the 1N6294HE3/73 must be used with correct polarity orientation and cannot substitute for bidirectional types in AC-coupled or floating-line applications.
What does the "HE3/73" suffix mean in 1N6294HE3/73?
The "HE3" suffix denotes RoHS-compliant construction with JESD 201 Class 2 whisker resistance and AEC-Q101 qualification; "/73" specifies packaging in 73" tape-and-reel format (1400 units per reel). This distinguishes it from commercial-grade "E3" variants and confirms compliance with automotive reliability standards required for deployment in the 1N6294HE3/73's target applications.
How does the 1N6294HE3/73 compare to the 1.5KE91A in thermal performance?
The 1N6294HE3/73 shares identical thermal characteristics with the 1.5KE91A: RθJL = 15.4 °C/W and RθJA = 75 °C/W. Both dissipate up to 6.5 W continuously at TL = 75 °C. The 1N6294HE3/73 adds AEC-Q101 qualification and Class 2 whisker resistance, but thermal design margins - including heatsinking requirements and PCB copper area - remain fully interchangeable with the 1.5KE91A when using the 1N6294HE3/73.
Can the 1N6294HE3/73 be used in parallel to increase surge current handling?
Yes, multiple 1N6294HE3/73 devices can be paralleled to distribute surge current, but matching VBR (±2% binning recommended) and symmetrical PCB layout are essential to ensure current sharing. Derating by 20% per added device is advised due to minor VBR variation; the 1N6294HE3/73's low dynamic impedance supports effective parallel operation when implemented with matched units and balanced trace inductance.
1N6294HE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 73.7V
- Voltage - Breakdown (Min):
- 81.9V
- Voltage - Clamping (Max) @ Ipp:
- 131V
- Current - Peak Pulse (10/1000µs):
- 11.5A
- 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
1N6294HE3/73 FAQ
1.How can I place an order for 1N6294HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6294HE3/73 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 1N6294HE3/73 reliable?
The price and inventory of 1N6294HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6294HE3/73 is usually 5 days.
3.What payment methods are accepted for 1N6294HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6294HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6294HE3/73?
1N6294HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6294HE3/73 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 1N6294HE3/73?
For technical support, including 1N6294HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6294HE3/73 requirements.
6.How does Aetrix verify that 1N6294HE3/73 is sourced from the original manufacturer or authorized distributors?
All 1N6294HE3/73 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 1N6294HE3/73 meets industry standards.
7.What is the process for return or replacement of 1N6294HE3/73?
All 1N6294HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6294HE3/73, 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 1N6294HE3/73 part is unused and in its original packaging.
Return procedure for 1N6294HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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