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Vishay General Semiconductor - Diodes Division 1.5KE6.8A/54
- Part No.:
- 1.5KE6.8A/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE6.8A/54.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:3,820
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Product details
Overview
1.5KE6.8A from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection of sensitive electronics. It features a 6.45 V to 7.14 V breakdown voltage (VBR) at 10 mA, 5.80 V maximum working peak reverse voltage (VWM), and clamps transients up to 10.5 V at 143 A peak pulse current (IPPM) under 10/1000 µs waveform - used in power supply input stages, I/O line protection, and automotive ECU front-end circuits.
For engineers reviewing the 1.5KE6.8A datasheet, 1.5KE6.8A pinout, 1.5KE6.8A application, or 1.5KE6.8A equivalent, this device delivers verified 1500 W peak pulse power capability, glass-passivated junction reliability, and AEC-Q101-qualified variants - critical for selecting robust, high-energy transient suppression in industrial and automotive designs requiring stable clamping performance below 11 V.
Technical Context
The 1.5KE6.8A operates as a unidirectional avalanche diode with a cathode-marked epoxy-molded DO-201AD package. Its clamping action begins within <1 ns, limiting induced surges before downstream ICs experience overstress. The device sustains 200 A non-repetitive forward surge current (IFSM) and exhibits low incremental surge resistance due to optimized silicon junction geometry.
Thermal design relies on its 15.4 °C/W junction-to-lead thermal resistance (RθJL) and 75 °C/W junction-to-ambient rating (RθJA). It maintains stable VBR temperature coefficient of +0.057 %/°C and supports operation from –55 °C to +175 °C junction temperature - enabling use in high-temperature engine bay or industrial control environments without derating penalties.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 6.45 V to 7.14 V at 10 mA - defines precise avalanche initiation threshold for repeatable overvoltage triggering |
| Working Peak Reverse Voltage VWM | 5.80 V - maximum continuous reverse voltage before leakage exceeds 1000 µA, ensuring no false conduction during normal operation |
| Clamping Voltage VC | 10.5 V at 143 A (10/1000 µs) - actual voltage seen by protected circuit during worst-case surge, limiting stress on 12 V rail components |
| Peak Pulse Power PPPM | 1500 W - energy-handling capacity for standardized lightning/surge transients per IEC 61000-4-5 |
| Peak Pulse Current IPPM | 143 A - maximum transient current the device safely shunts without failure |
| Junction Temperature Range | –55 °C to +175 °C - enables deployment in under-hood automotive, industrial motor drives, and outdoor telecom equipment |
| Forward Voltage VF | 3.5 V at 100 A - low conduction loss during high-current surge events, minimizing self-heating |
Pinout & Package
Package: DO-201AD molded epoxy case (Case Style 1.5KE), matte tin-plated leads, RoHS-compliant (E3 suffix), UL 94 V-0 rated. Cathode indicated by color band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during reverse-biased clamping | Connected to protected line (e.g., 12 V rail); conducts surge current toward ground when VIN exceeds VBR |
| Cathode | Current exit point during clamping; marked with band | Connected to system ground or low-impedance return path; establishes reference for precise VBR threshold |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Ensures long-term stability of VBR and leakage current under thermal cycling and humidity exposure |
| 1500 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial and automotive applications |
| Sub-nanosecond response time | Clamps transients before propagation to downstream logic or analog circuitry - critical for protecting microcontrollers and sensors |
| AEC-Q101 qualified variants available | Validated for automotive-grade reliability including HTOL, TC, and HAST testing - required for ECU, ADAS, and infotainment systems |
| Low incremental clamping resistance | Minimizes voltage overshoot during high di/dt events, improving protection margin for 5 V and 3.3 V logic interfaces |
Applications
| Automotive Power Input Protection | Industrial PLC I/O Module Protection |
|---|---|
Use Scenario: 12 V battery feed to engine control unit exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping element placed between input rail and ground, triggered within 1 ns to limit voltage to ≤10.5 V. Use Value: Prevents permanent damage to MCU power pins and CAN transceivers during ISO 7637-2 Pulse 5a events. |
Use Scenario: 24 V digital input channel in programmable logic controller subjected to field-wiring induced surges. IC Role / Device Role / Timing Role: Front-end TVS on terminal block side, absorbing 1 kV/500 A transients before signal conditioning circuitry. Use Value: Maintains functional safety integrity by eliminating false triggering and latch-up in optocoupler-isolated inputs. |
| Consumer Power Adapter Surge Suppression | Telecom Line Interface Protection |
Use Scenario: Secondary-side DC output (5 V/9 V/12 V) of wall adapter exposed to mains-coupled fast transients. IC Role / Device Role / Timing Role: Final-stage clamp after bulk capacitor, suppressing residual spikes before USB or charging circuitry. Use Value: Enables compliance with UL 62368-1 surge withstand requirements without adding series impedance or delay. |
Use Scenario: Low-voltage DC power feed to remote base station radio unit via outdoor cabling. IC Role / Device Role / Timing Role: Bidirectional-capable variant (1.5KE6.8CA) used across differential pair; unidirectional 1.5KE6.8A applied to single-ended bias lines. Use Value: Survives repeated lightning-induced surges per ITU-T K.20/21 while preserving signal integrity on RS-485 or bias rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8A | Lower PPPM (600 W), smaller SMB package (JEDEC DO-214AA), higher VC (11.2 V at 53.3 A) | Preferred for space-constrained PCBs where 600 W surge level suffices; not suitable for ISO 7637-2 Pulse 5a | Select when board area is limited and peak surge energy is ≤600 W; verify layout thermal relief for SMB footprint |
| 1.5SMC6.8A | Same 1500 W rating but SMC (DO-214AB) package; slightly higher VC (10.8 V at 139 A); identical VBR range | Better thermal dissipation than DO-201AD in high-density layouts; compatible with automated SMT placement | Choose for SMT production scalability and improved thermal performance without changing electrical protection profile |
Compared with 1.5KE6.8A, SMBJ6.8A trades peak power and thermal robustness for compactness, while 1.5SMC6.8A retains full 1500 W capability in a surface-mount format - enabling direct replacement in new designs where reflow compatibility and thermal management outweigh through-hole mechanical retention needs.
Availability
1.5KE6.8A is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, and consumer power adapter designs requiring stable component supply with consistent clamping performance and long-term reliability.
Supply support for 1.5KE6.8A 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 demanding industrial and automotive applications.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - delivering consistent 1500 W surge handling, AEC-Q101 qualification, and extended temperature operation up to +175 °C.
FAQ
What is the exact breakdown voltage range for 1.5KE6.8A?
The 1.5KE6.8A has a guaranteed breakdown voltage (VBR) range of 6.45 V to 7.14 V measured at 10 mA test current (IT), per Vishay Document Number 88301. This tight tolerance ensures predictable clamping onset across production lots and temperature extremes, making 1.5KE6.8A suitable for precision overvoltage protection in 5 V and 12 V systems where margin above nominal rail is critical.
Is 1.5KE6.8A suitable for automotive applications?
Yes - the 1.5KE6.8AHE3_B variant is AEC-Q101 qualified per Vishay documentation, having passed stress tests including high-temperature operating life (HTOL), temperature cycling (TC), and highly accelerated stress testing (HAST). The standard 1.5KE6.8A-E3/54 is commercial grade; for automotive use, specify the HE3_B suffix to ensure qualification compliance and traceable lot-level validation data.
What is the clamping voltage of 1.5KE6.8A at rated peak pulse current?
At its rated peak pulse current of 143 A (10/1000 µs waveform), the 1.5KE6.8A clamps to a maximum of 10.5 V. This value is confirmed in the Electrical Characteristics table of Vishay's 88301 datasheet and represents the highest voltage imposed on the protected circuit during worst-case surge conditions - directly determining safe operating margins for downstream 12 V logic and power devices.
How does the 1.5KE6.8A differ from bidirectional 1.5KE6.8CA?
The 1.5KE6.8A is unidirectional with cathode marking and blocks voltage in one direction only, while 1.5KE6.8CA is bidirectional with symmetrical clamping in both polarities and no polarity marking. Their VBR, VWM, and VC values are identical, but 1.5KE6.8CA is required for AC-coupled or floating signal lines (e.g., RS-485, Ethernet PHY bias), whereas 1.5KE6.8A is used on DC rails with defined ground reference.
What package type and lead finish does 1.5KE6.8A use?
The 1.5KE6.8A uses the DO-201AD axial-leaded package (Case Style 1.5KE) with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. The E3 suffix indicates RoHS compliance and JESD 201 Class 1A whisker resistance; the "/54" denotes packaging in 13" paper tape and reel with 1400 units per reel.
1.5KE6.8A/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5.8V
- Voltage - Breakdown (Min):
- 6.45V
- Voltage - Clamping (Max) @ Ipp:
- 10.5V
- Current - Peak Pulse (10/1000µs):
- 143A
- 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
1.5KE6.8A/54 FAQ
1.How can I place an order for 1.5KE6.8A/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE6.8A/54 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 1.5KE6.8A/54 reliable?
The price and inventory of 1.5KE6.8A/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE6.8A/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE6.8A/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE6.8A/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE6.8A/54?
1.5KE6.8A/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE6.8A/54 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 1.5KE6.8A/54?
For technical support, including 1.5KE6.8A/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE6.8A/54 requirements.
6.How does Aetrix verify that 1.5KE6.8A/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE6.8A/54 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 1.5KE6.8A/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE6.8A/54?
All 1.5KE6.8A/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE6.8A/54, 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 1.5KE6.8A/54 part is unused and in its original packaging.
Return procedure for 1.5KE6.8A/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE6.8A/54 Tags
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