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Vishay General Semiconductor - Diodes Division 1.5KE6.8A-E3/54
- Part No.:
- 1.5KE6.8A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE6.8A-E3/54.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:1,308
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Product details
Overview
1.5KE6.8A-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary-side overvoltage protection in DC power rails and signal lines. It features a 6.45 V to 7.14 V breakdown voltage (VBR) at 10 mA, 5.80 V maximum standoff voltage (VWM), 1000 µA maximum reverse leakage at VWM, 143 A peak pulse current (IPPM), and clamps transients to 10.5 V at rated surge. It is used to protect MOSFETs, ICs, and sensor interfaces against inductive switching spikes and ESD in industrial power supplies.
For engineers reviewing the 1.5KE6.8A-E3/54 datasheet, 1.5KE6.8A-E3/54 pinout, 1.5KE6.8A-E3/54 application, or 1.5KE6.8A-E3/54 equivalent, key selection criteria include its 1500 W 10/1000 µs peak pulse power rating, unidirectional polarity with cathode band marking, glass-passivated junction, RoHS-compliant matte tin leads, and suitability for commercial-grade surge protection where clamping voltage ≤10.5 V and VWM ≥5.8 V are required.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (<1000 µA leakage at 5.80 V), but triggers into low-impedance conduction when transient voltage exceeds its 6.45–7.14 V breakdown range. Its response time is sub-nanosecond (≤1 ns), enabling protection of fast-switching MOSFET gates and logic-level inputs.
The device uses a single-junction silicon PN structure with glass passivation for stable VBR tolerance and long-term reliability. Thermal resistance is 75 °C/W (junction-to-ambient) and 15.4 °C/W (junction-to-lead), supporting operation up to 175 °C junction temperature with appropriate PCB copper area or lead length management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V at 10 mA - defines precise clamping onset threshold for design margining |
| VWM | 5.80 V - maximum continuous working voltage before leakage rises above 1000 µA |
| IPPM | 143 A - peak surge current it safely clamps during 10/1000 µs transients |
| VC @ IPPM | 10.5 V - maximum clamped voltage seen by protected circuit during full-rated surge |
| PPPM | 1500 W - peak pulse power handling capability per 10/1000 µs waveform |
| TJ max | +175 °C - enables use in high-temperature environments like motor drives and power converters |
| Package | DO-201AD (Case Style 1.5KE) - axial-leaded, through-hole package with 0.375" lead length standard |
Pinout & Package
1.5KE6.8A-E3/54 is housed in a DO-201AD (Case Style 1.5KE) molded epoxy package with matte tin-plated axial leads. The cathode is marked by a color band on one end; the opposite end is anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or lowest potential rail; completes shunt path during clamping |
| Cathode | High-side transient input | Connected to protected line (e.g., +12 V rail); color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5 %) and long-term leakage performance over temperature and life |
| 1500 W peak pulse power | Supports robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V systems |
| Sub-nanosecond response | Clamps transients before sensitive gate oxides or CMOS inputs experience overstress |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance and J-STD-002 solderability standards |
| UL 497B recognized | Qualified for telecom and industrial surge protection applications requiring safety agency approval |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O against inductive kickback from relay coils and solenoid loads. IC Role / Device Role / Timing Role: Shunt TVS placed across coil supply rail or driver output to clamp flyback spikes to ≤10.5 V. Use Value: Prevents latch-up or permanent damage to 5 V/3.3 V logic interfaces and MOSFET gate oxide layers during 100–200 V transients. | Use Scenario: Input protection for LIN bus transceivers and sensor supply lines exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Unidirectional TVS on 12 V supply rail upstream of LDO regulators and CAN/LIN PHYs. Use Value: Limits transient overshoot to 10.5 V, ensuring downstream regulators remain within absolute maximum ratings during ISO 7637-2 Pulse 5a events. |
| Consumer Power Adapters | Telecom Line Cards |
Use Scenario: Secondary-side overvoltage suppression on +5 V and +12 V outputs of AC/DC adapters subject to capacitor discharge and hot-plug transients. IC Role / Device Role / Timing Role: Clamping device placed between output rail and ground, sized for 1500 W surge handling. Use Value: Maintains safe operating voltage for USB-PD controllers and PMICs during 10/1000 µs surges up to 143 A. | Use Scenario: Protection of Ethernet PHY power pins and data line terminations against lightning-induced surges on remote site equipment. IC Role / Device Role / Timing Role: Primary-stage TVS on 3.3 V/5 V bias rails feeding PoE interface ICs and magnetics. Use Value: Clamps induced surges to 10.5 V before they propagate into IEEE 802.3af/at compliant circuitry, preserving compliance margins. |
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 | DO-214AA package (SMB), lower PPPM = 600 W, VC = 11.2 V at 53.3 A | Surface-mount only; unsuitable for high-energy 1500 W surges | Select when board space is constrained and surge energy is ≤600 W (e.g., secondary-side low-power rails) |
| 1N6267A | Same electrical specs and DO-201AD package; identical VBR, VWM, VC, and IPPM; non-RoHS legacy variant | No AEC-Q101 or RoHS compliance; not qualified for automotive or modern commercial production | Use only for legacy repair or non-RoHS prototyping; 1.5KE6.8A-E3/54 is direct functional replacement with enhanced reliability and compliance |
Compared with SMBJ6.8A, 1.5KE6.8A-E3/54 delivers 2.5× higher surge power handling and lower clamping voltage, making it suitable for primary-side protection; compared with 1N6267A, it adds RoHS compliance, JESD 201 whisker resistance, and UL 497B recognition without altering electrical behavior.
Availability
1.5KE6.8A-E3/54 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom line cards requiring stable component supply, long-lifecycle support, and traceable RoHS-compliant sourcing.
Supply support for 1.5KE6.8A-E3/54 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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and application-specific optimization.
The 1.5KE series was developed for high-energy transient suppression in industrial, automotive, and telecom infrastructure, targeting applications where 1500 W surge immunity and sub-10.5 V clamping are critical for system-level robustness.
FAQ
What is the breakdown voltage tolerance of the 1.5KE6.8A-E3/54?
The 1.5KE6.8A-E3/54 has a specified breakdown voltage range of 6.45 V to 7.14 V at 10 mA test current, representing a ±5 % tolerance around the nominal 6.8 V rating. This tight VBR window ensures predictable clamping onset in designs where margining against overvoltage thresholds is critical. The 1.5KE6.8A-E3/54 maintains this specification across its full operating temperature range of –55 °C to +175 °C.
Is the 1.5KE6.8A-E3/54 suitable for automotive applications?
The 1.5KE6.8A-E3/54 is a commercial-grade part and is not AEC-Q101 qualified. For automotive use, Vishay offers the 1.5KE6.8AHE3_B variant, which carries AEC-Q101 qualification and extended reliability testing. The 1.5KE6.8A-E3/54 may be used in non-safety-critical aftermarket or industrial-adjacent automotive subsystems, but the 1.5KE6.8A-E3/54 itself does not meet automotive qualification requirements.
What is the maximum clamping voltage of the 1.5KE6.8A-E3/54 under full-rated surge?
The 1.5KE6.8A-E3/54 clamps to a maximum of 10.5 V when subjected to its full-rated 143 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is guaranteed per datasheet and represents the highest voltage the protected circuit will experience during worst-case surge events. The 1.5KE6.8A-E3/54 achieves this low clamping with minimal incremental resistance, enhancing protection margin for 5 V logic and low-voltage MOSFETs.
How does the 1.5KE6.8A-E3/54 differ from bidirectional variants like 1.5KE6.8CA?
The 1.5KE6.8A-E3/54 is unidirectional and features a cathode band marking; it conducts only during reverse overvoltage. In contrast, 1.5KE6.8CA is bidirectional and symmetrical, suppressing transients in both polarities without polarity marking. The 1.5KE6.8A-E3/54 is intended for DC rail protection where polarity is fixed, while 1.5KE6.8CA suits AC lines or differential signals. Their VBR, VC, and PPPM values are otherwise identical.
What is the thermal resistance of the 1.5KE6.8A-E3/54, and how does it affect layout?
The 1.5KE6.8A-E3/54 has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15.4 °C/W. To maintain safe operation at full power, PCB layout must provide adequate copper area on both leads and avoid excessive trace length. For continuous 6.5 W dissipation, ambient temperature must remain below ~80 °C unless heatsinking or forced air is applied. The 1.5KE6.8A-E3/54 relies on lead conduction for thermal relief, so lead length and pad size directly impact derating.
1.5KE6.8A-E3/54 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:
- Active
- 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-E3/54 FAQ
1.How can I place an order for 1.5KE6.8A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE6.8A-E3/54 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-E3/54 reliable?
The price and inventory of 1.5KE6.8A-E3/54 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-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE6.8A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE6.8A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE6.8A-E3/54?
1.5KE6.8A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE6.8A-E3/54 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-E3/54?
For technical support, including 1.5KE6.8A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE6.8A-E3/54 requirements.
6.How does Aetrix verify that 1.5KE6.8A-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE6.8A-E3/54 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-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE6.8A-E3/54?
All 1.5KE6.8A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE6.8A-E3/54, 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-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE6.8A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE6.8A-E3/54 Tags
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