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Vishay General Semiconductor - Diodes Division 1N6294AHE3/51
- Part No.:
- 1N6294AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1N6294AHE3/51.pdf
- Description:
- TVS DIODE 77.8VWM 125VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,829
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Product details
Overview
1N6294AHE3/51 from Vishay General Semiconductor is a uni-directional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in power rails and signal lines. It features a 86.5 V to 95.5 V breakdown voltage (VBR) at 1.0 mA test current, 77.8 V maximum stand-off voltage (VWM), 125 V clamping voltage (VC) at 12.0 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive ECUs, industrial I/O modules, and telecom power supplies.
For engineers reviewing the 1N6294AHE3/51 datasheet, 1N6294AHE3/51 pinout, 1N6294AHE3/51 application, or 1N6294AHE3/51 equivalent, key selection criteria include verified uni-directional polarity, AEC-Q101 qualification, JEDEC 1.5KE package compatibility, low 0.106 %/°C VBR temperature coefficient, and compliance with UL 497B surge protector classification.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under transient overvoltage exceeding VWM, it avalanches rapidly (<1 ns response) to divert surge current away from downstream ICs. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1.0 µA at VWM), while the molded epoxy case meets UL 94 V-0 flammability rating.
The device supports uni-directional operation only (cathode marked by color band), with 200 A non-repetitive forward surge capability (8.3 ms half-sine), 6.5 W steady-state power dissipation at TL = 75 °C, and thermal resistance of 15.4 °C/W junction-to-lead - enabling direct PCB mounting without heatsink for short-duration transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at 1.0 mA - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 77.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 125 V at 12.0 A - clamped voltage during 10/1000 µs surge, limiting stress on protected circuitry |
| PPPM | 1500 W - peak transient power handling capacity, validated per R.E.A. 10/1000 µs standard |
| TJ max. | +175 °C - enables operation in under-hood automotive environments and high-ambient industrial settings |
| AEC-Q101 | Qualified - certified for automotive electronics per stress-test requirements including HTGB, HTRB, and TCT |
| Package | JEDEC 1.5KE - axial-leaded, 0.375" lead length, RoHS-compliant matte tin plating per J-STD-002 |
Pinout & Package
Package: JEDEC 1.5KE molded epoxy case with axial leads; cathode identified by color band; lead finish: matte tin, solderable per J-STD-002 and JESD 22-B102; meets JESD 201 class 2 whisker test (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path) in uni-directional clamp configuration |
| Cathode | Avalanche clamping terminal | Marked with color band; connected to protected line (e.g., 24 V rail or CAN_H) to shunt surges to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance (±5 %) and <1.0 µA leakage at VWM across -55 °C to +175 °C |
| 1500 W peak pulse power (10/1000 µs) | Withstands lightning-induced surges per IEC 61000-4-5 Level 4 (4 kV) when properly routed and decoupled |
| AEC-Q101 qualification | Validated for automotive powertrain and body control modules requiring zero field failure risk |
| UL 497B recognition (QVGQ2) | Approved for use in telecom and industrial surge protection assemblies without additional certification |
| Low thermal resistance (RθJL = 15.4 °C/W) | Enables effective heat transfer to PCB copper pour or chassis, supporting >1000 surge events at rated duty cycle |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: 12 V/24 V battery-supplied ECU power input subjected to load dump (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Primary shunt clamping element placed directly at connector entry point to limit transient voltage to ≤125 V. Use Value: Prevents damage to MCU power management ICs and CAN transceivers during 120 V/400 ms load dump events. |
Use Scenario: 24 V DC digital input channel in programmable logic controller exposed to inductive kickback from solenoid valves. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp between input terminal and common rail, triggered within 1 ns. Use Value: Eliminates false triggering and extends optocoupler lifetime by suppressing >100 V spikes before they reach isolation barrier. |
| Telecom Line Interface Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: DC power feed to remote DSLAM or base station radio unit via outdoor cabling vulnerable to induced lightning. IC Role / Device Role / Timing Role: First-stage surge suppressor in multi-level protection scheme, coordinated with GDT and MOV. Use Value: Clamps 10/1000 µs surges to 125 V before secondary protection stages activate, reducing energy burden on downstream components. |
Use Scenario: 12 V control supply for BLDC motor driver in smart washing machine subjected to commutation noise and ESD. IC Role / Device Role / Timing Role: Localized rail clamp adjacent to gate driver IC to suppress fast dv/dt transients from MOSFET switching. Use Value: Prevents latch-up in high-side driver ICs and maintains PWM timing integrity during 50 ns edge transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85A | DO-214AA package, 85 V VWM, 135 V VC @ 10.4 A, 600 W PPPM | Surface-mount; lower power rating; suited for space-constrained PCBs with moderate surge exposure | Select SMBJ85A when board area is limited and peak surge energy does not exceed 600 W |
| 1.5KE91A | Same 1.5KE package, identical VBR/VWM/VC specs, but E3 (not HE3) suffix - commercial grade, no AEC-Q101 | Lacks automotive qualification; suitable for industrial/commercial systems without automotive reliability mandates | Choose 1.5KE91A for cost-sensitive non-automotive designs where AEC-Q101 is not required |
Compared with SMBJ85A and 1.5KE91A, the 1N6294AHE3/51 uniquely combines AEC-Q101 qualification, 1500 W surge capacity, and axial-leaded 1.5KE packaging - making it the only option qualified for under-hood automotive use with full load-dump immunity.
Availability
1N6294AHE3/51 is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, telecom power feeds, and appliance motor drives requiring stable component supply with traceable sourcing and long-term lifecycle support.
Supply support for 1N6294AHE3/51 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The 1N6294AHE3/51 belongs to Vishay's TRANSZORB® TVS family, engineered specifically for robust, standardized overvoltage protection in harsh environments - emphasizing AEC-Q101 compliance, UL recognition, and repeatable clamping performance.
FAQ
What is the exact breakdown voltage range for 1N6294AHE3/51?
The 1N6294AHE3/51 has a guaranteed breakdown voltage (VBR) range of 86.5 V to 95.5 V at 1.0 mA test current, measured per JEDEC standards. This tight 10.5 % tolerance ensures predictable clamping onset across temperature and production lots, critical for protecting 24 V automotive systems where overvoltage margin must be precisely controlled. The 1N6294AHE3/51 achieves this via glass-passivated junction processing and 100 % lot testing.
Is 1N6294AHE3/51 suitable for bi-directional transient suppression?
No, the 1N6294AHE3/51 is strictly a uni-directional TVS diode - its cathode is marked with a color band and it conducts only in reverse avalanche mode. For bi-directional protection, Vishay offers the 1N6294CAHE3/51 variant (with CA suffix), which provides symmetrical clamping in both polarities. Using the 1N6294AHE3/51 in bi-directional applications risks forward conduction damage during negative transients.
What does the 'HE3/51' suffix indicate in 1N6294AHE3/51?
The 'HE3' suffix denotes RoHS-compliant construction with AEC-Q101 qualification and JESD 201 class 2 whisker resistance; '51' specifies the packaging format: 13" diameter paper tape and reel, 1400 units per reel. This distinguishes it from E3-only (commercial grade) or HE3_A (different revision code) variants. The 1N6294AHE3/51 thus guarantees automotive-grade reliability and standardized logistics for high-volume manufacturing.
How does the clamping voltage of 1N6294AHE3/51 compare to its breakdown voltage?
The 1N6294AHE3/51 clamps at 125 V (VC) when subjected to its rated 12.0 A peak pulse current (IPPM), representing a 30–45 V overhead above its VBR range (86.5–95.5 V). This incremental clamping voltage (ΔVC ≈ 30 V) reflects low dynamic impedance during surge conduction - a key design advantage that minimizes voltage overshoot on protected circuits compared to higher-impedance alternatives.
Can 1N6294AHE3/51 replace 1.5KE91A in an existing design?
Yes, the 1N6294AHE3/51 is functionally identical to 1.5KE91A in electrical parameters and 1.5KE package dimensions, but adds AEC-Q101 qualification and enhanced whisker resistance (HE3 vs. E3). No PCB layout changes are needed. However, if the original design used 1.5KE91A-E3/54 (non-automotive), upgrading to 1N6294AHE3/51 introduces automotive-grade reliability - making it a drop-in enhancement for designs targeting ISO/TS 16949 compliance.
1N6294AHE3/51 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):
- 77.8V
- Voltage - Breakdown (Min):
- 86.5V
- Voltage - Clamping (Max) @ Ipp:
- 125V
- Current - Peak Pulse (10/1000µs):
- 12A
- 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
1N6294AHE3/51 FAQ
1.How can I place an order for 1N6294AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6294AHE3/51 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 1N6294AHE3/51 reliable?
The price and inventory of 1N6294AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6294AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1N6294AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6294AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6294AHE3/51?
1N6294AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6294AHE3/51 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 1N6294AHE3/51?
For technical support, including 1N6294AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6294AHE3/51 requirements.
6.How does Aetrix verify that 1N6294AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1N6294AHE3/51 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 1N6294AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1N6294AHE3/51?
All 1N6294AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6294AHE3/51, 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 1N6294AHE3/51 part is unused and in its original packaging.
Return procedure for 1N6294AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6294AHE3/51 Tags
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