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Vishay General Semiconductor - Diodes Division 1N6294A-E3/51
- Part No.:
- 1N6294A-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1N6294A-E3/51.pdf
- Description:
- TVS DIODE 77.8VWM 125VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,045
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Product details
Overview
1N6294A-E3/51 from Vishay General Semiconductor is a unidirectional 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 standoff voltage (VWM), 125 V clamping voltage (VC) at 12.0 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1N6294A-E3/51 datasheet, 1N6294A-E3/51 pinout, 1N6294A-E3/51 application, or 1N6294A-E3/51 equivalent, this device is selected for high-energy transient suppression where fast response (<1 ns), low clamping ratio (VC/VBR ≈ 1.31), and robust 175 °C junction temperature rating are critical in automotive, industrial, and telecom power supply designs.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1000 Ω at VWM), but triggers into low-impedance conduction when transient voltage exceeds VBR, diverting surge current away from downstream components. Its glass-passivated junction ensures stable leakage performance and repeatable breakdown behavior across temperature.
The 1N6294A-E3/51 uses a standardized DO-201AD (Case Style 1.5KE) package with axial leads, rated for 200 A non-repetitive forward surge current (IFSM) and 6.5 W steady-state power dissipation on infinite heatsink. Thermal resistance is 15.4 °C/W junction-to-lead, enabling effective heat transfer during transient events without external heatsinking in most PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at 1.0 mA - defines precise voltage threshold for reliable clamping onset without premature triggering |
| VWM | 77.8 V - maximum continuous operating voltage; ensures no conduction during nominal 72 V rail operation (e.g., 48 V systems with 20 % tolerance) |
| VC @ IPPM | 125 V at 12.0 A - limits protected circuit voltage to safe level during 10/1000 µs surge, preserving 3.3 V/5 V logic integrity |
| PPPM | 1500 W - supports single-event surge handling up to 1.5 kW, sufficient for IEC 61000-4-5 Level 4 (4 kV/2 Ω) |
| IFSM | 200 A - withstands 8.3 ms half-sine surge common in motor drive and relay coil snubbing applications |
| TJ max. | 175 °C - enables use in under-hood automotive environments and high-ambient industrial enclosures |
| Leakage @ VWM | 1.0 µA - negligible standby power loss and minimal interference with high-impedance sensor bias networks |
Pinout & Package
Package: DO-201AD (Case Style 1.5KE), molded epoxy body with matte tin-plated axial leads; meets UL 94 V-0 flammability rating and JESD 22-B102 solderability requirements. Cathode identified by color band on body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or return path; establishes reference for clamping action during positive transients |
| Cathode | Protected line input | Connected to line being protected (e.g., +12 V rail); conducts surge current to anode when VAK > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5 %) and low parameter drift over 1000-cycle surge life |
| 1500 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive ECUs without derating |
| Clamping ratio VC/VBR ≈ 1.31 | Minimizes overvoltage stress on downstream FET gates and IC inputs during worst-case transients |
| Response time < 1 ns | Activates before ESD or lightning-induced edges can propagate through PCB traces to sensitive nodes |
| AEC-Q101 qualified option available (HE3 suffix) | Validated for automotive under-hood use including thermal cycling, humidity, and mechanical shock per AEC standard |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed control modules from load dump (ISO 16750-2) and alternator ripple transients. IC Role / Device Role / Timing Role: Shunt clamping element placed between power rail and chassis ground; activated within sub-nanosecond of overvoltage detection. Use Value: Limits rail voltage to ≤125 V during 120 V/500 ms load dump event, preventing damage to MCU power supplies and CAN transceivers. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to long harnesses in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (used cathode-to-line) suppresses both positive and negative induced transients on shielded twisted-pair lines. Use Value: Clamps ±125 V transients from nearby motor switching, preserving 16-bit ADC accuracy and eliminating false trigger events in PLC inputs. |
| Telecom DC Power Input Protection | Consumer Device USB/DC Jack Protection |
Use Scenario: Front-end surge protection for 48 V PoE-powered equipment (e.g., IP cameras, wireless access points). IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of DC-DC converter input; coordinated with MOV and fuse for staged protection. Use Value: Absorbs 1500 W surge energy from lightning-induced surges on outdoor Ethernet cables while maintaining <1 µA leakage at 57 V PoE+ operating voltage. |
Use Scenario: Input protection for wall-adaptor powered consumer electronics (e.g., smart speakers, set-top boxes) against AC/DC adapter fault transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between DC jack center pin and ground to suppress reverse-polarity and overvoltage faults. Use Value: Blocks >77.8 V faults before they reach LDO regulators, preventing latch-up and enabling safe hot-plug operation without system reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70A | Lower VBR (70.0–77.5 V), lower PPPM (600 W), SMB package (surface-mount) | Designed for board-level space-constrained designs; insufficient for IEC 61000-4-5 Level 4 compliance | Select when footprint size is critical and surge energy is limited to ≤600 W (e.g., secondary protection after front-end MOV) |
| 1.5KE91A | Identical electrical specs and DO-201AD package; differs only in packaging format (bulk vs. tape-and-reel E3/51) | No functional difference; same reliability, thermal, and clamping performance | Choose 1.5KE91A for manual prototyping or small-batch assembly; 1N6294A-E3/51 preferred for automated SMT line feeding via 13" reel |
Compared with SMBJ70A, the 1N6294A-E3/51 delivers 2.5× higher surge power handling and tighter VBR tolerance, making it suitable for primary protection; versus 1.5KE91A, it offers identical performance with optimized logistics for high-volume production via E3/51 tape-and-reel delivery.
Availability
1N6294A-E3/51 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, telecom DC input surge suppression, and consumer DC jack fault protection requiring stable component supply across multi-year production cycles.
Supply support for 1N6294A-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 high-reliability diodes, rectifiers, and protection devices with broad automotive and industrial qualification coverage.
The 1N6294A-E3/51 belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh environments where failure modes must be fail-open and clamping precision is mission-critical.
FAQ
What is the breakdown voltage range of the 1N6294A-E3/51?
The 1N6294A-E3/51 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 ±5 % tolerance ensures consistent clamping behavior across production lots and supports reliable design margining for 72–80 V system rails.
Is the 1N6294A-E3/51 RoHS compliant and lead-free?
Yes, the 1N6294A-E3/51 carries the "E3" suffix, indicating full RoHS compliance per Directive 2011/65/EU and exemption 6c. Its matte tin-plated leads meet J-STD-002 solderability requirements and JESD 201 Class 1A whisker resistance testing.
Can the 1N6294A-E3/51 be used in bidirectional configurations?
No - the 1N6294A-E3/51 is a unidirectional TVS diode. For bidirectional protection at comparable voltage ratings, Vishay offers the 1N6294CA variant (with CA suffix), which provides symmetrical clamping in both polarities and no polarity marking on the package.
What is the maximum clamping voltage of the 1N6294A-E3/51 under surge conditions?
The 1N6294A-E3/51 clamps to a maximum of 125 V when subjected to its rated 12.0 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is guaranteed across temperature and ensures downstream components remain below absolute maximum voltage ratings.
Does the 1N6294A-E3/51 require a heatsink for continuous operation?
No - the 1N6294A-E3/51 is rated for 6.5 W power dissipation on an infinite heatsink, but its intended use is transient suppression, not continuous conduction. Under normal operation, leakage remains below 1.0 µA at 77.8 V, generating negligible steady-state heat; no heatsink is required for typical PCB mounting.
1N6294A-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):
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1N6294A-E3/51 FAQ
1.How can I place an order for 1N6294A-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6294A-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 1N6294A-E3/51 reliable?
The price and inventory of 1N6294A-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 1N6294A-E3/51 is usually 5 days.
3.What payment methods are accepted for 1N6294A-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6294A-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6294A-E3/51?
1N6294A-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6294A-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 1N6294A-E3/51?
For technical support, including 1N6294A-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6294A-E3/51 requirements.
6.How does Aetrix verify that 1N6294A-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1N6294A-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 1N6294A-E3/51 meets industry standards.
7.What is the process for return or replacement of 1N6294A-E3/51?
All 1N6294A-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6294A-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 1N6294A-E3/51 part is unused and in its original packaging.
Return procedure for 1N6294A-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6294A-E3/51 Tags
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