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Vishay General Semiconductor - Diodes Division 1.5KE68CA/54
- Part No.:
- 1.5KE68CA/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE68CA/54.pdf
- Description:
- TVS DIODE 58.1VWM 92VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,938
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Product details
Overview
1.5KE68CA/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 64.6 V to 71.4 V breakdown voltage (VBR), 58.1 V standoff voltage (VWM), 92.0 V clamping voltage (VC) at 16.3 A peak pulse current, 1500 W peak pulse power (10/1000 µs), 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 surges in industrial and automotive systems.
For engineers reviewing the 1.5KE68CA/54 datasheet, 1.5KE68CA/54 pinout, 1.5KE68CA/54 application, or 1.5KE68CA/54 equivalent, this part delivers verified bidirectional clamping performance with low incremental surge resistance, fast sub-nanosecond response, and AEC-Q101 qualification options - critical for reliable transient suppression in high-reliability DC power rails and bidirectional data lines.
Technical Context
This device functions as a voltage-clamped shunt protector: during transient events exceeding VWM, it avalanches into low-impedance conduction to divert surge current away from downstream circuitry. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 µA at VWM).
Designed for unclamped 10/1000 µs waveform compliance, it sustains 1500 W peak pulse power with <0.1% duty cycle, and exhibits 0.104 %/°C temperature coefficient of VBR. Thermal resistance is 15.4 °C/W (junction-to-lead), enabling effective heat dissipation through PCB copper pours or lead frames without heatsinks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V - defines precise avalanche initiation threshold under 1 mA test current; ensures consistent clamping onset across temperature and unit variance. |
| VWM | 58.1 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA; sets safe DC bias margin for protected circuits. |
| VC @ IPPM | 92.0 V at 16.3 A - clamping voltage during full 1500 W transient; determines worst-case voltage stress on downstream components. |
| PPPM | 1500 W - peak pulse power handling per 10/1000 µs waveform; enables protection against severe lightning or EFT events per IEC 61000-4-5. |
| IPPM | 16.3 A - peak pulse current corresponding to VC; defines minimum trace/solder joint current-carrying capability required in layout. |
| TJ range | –55 °C to +175 °C - extended junction temperature rating supports under-hood automotive and industrial environments without derating. |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package (0.375" lead length); compatible with wave soldering and manual assembly; UL 94 V-0 rated epoxy body. |
Pinout & Package
1.5KE68CA/54 uses a two-terminal axial-leaded DO-201AD (Case Style 1.5KE) package. As a bidirectional TVS, it has no polarity marking; both leads are electrically symmetric and interchangeable in circuit placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction terminal | Either lead connects to protected line; no cathode band - enables flexible routing in AC or differential signal paths without orientation constraints. |
| Leads (matte tin plated) | Current conduction path and thermal interface | Solderable per J-STD-002/JESD 22-B102; supports 275 °C solder dip (10 s max); provides primary thermal path (RθJL = 15.4 °C/W) to PCB copper. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5%), low leakage (<1 µA), and long-term reliability under humidity and thermal cycling. |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly laid out with low-inductance grounding. |
| Sub-nanosecond response time | Clamps transients within ~1 ns - faster than MOVs or GDTs - preserving signal integrity in high-speed interfaces. |
| AEC-Q101 qualified variants available | HE3 suffix versions (e.g., 1.5KE68CAHE3_B) meet automotive-grade stress testing for under-hood applications. |
| UL 94 V-0 molded epoxy case | Self-extinguishing encapsulation prevents flame propagation in safety-critical power supply and battery management systems. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protecting gate drivers and microcontroller I/O from inductive kickback during relay or solenoid switching in PLCs and HVAC controllers. IC Role / Device Role: Bidirectional shunt clamp placed across DC bus or signal line to limit transient voltage to ≤92 V. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic and 60 V-rated MOSFETs by clamping spikes before they exceed absolute maximum ratings. |
Use Scenario: Safeguarding LIN bus transceivers and sensor inputs (e.g., ambient temperature, door position) against load dump and jump-start surges. IC Role / Device Role: Standoff protection element connected between LIN line and ground, operating continuously at 12 V nominal with 58.1 V VWM. Use Value: Maintains communication integrity during 24 V load dump events (ISO 7637-2 Pulse 5a) by limiting line voltage to 92 V without affecting normal signaling. |
| Telecom Power Feeds | Consumer Appliance Control Boards |
|
Use Scenario: Shielding PoE-powered Ethernet switch ports and remote PHYs from induced lightning surges on outdoor cabling. IC Role / Device Role: Primary-level TVS on DC input side of isolated DC/DC converter, placed before bulk capacitance. Use Value: Absorbs up to 1500 W of surge energy while holding output-side voltage below 92 V - protecting isolation barriers and secondary-side regulators. |
Use Scenario: Securing microcontroller reset lines and front-panel button inputs in washing machines and refrigerators exposed to ESD and relay noise. IC Role / Device Role: Low-capacitance (<50 pF typical) bidirectional clamp on 3.3 V or 5 V control nets. Use Value: Suppresses 8 kV contact ESD (IEC 61000-4-2) without distorting logic edges or causing false resets due to fast response and minimal parasitic loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64CA | DO-214AA package; lower PPPM (600 W); VBR = 71.1–78.6 V; higher VC (103 V @ 5.8 A) | Surface-mount only; suited for space-constrained PCBs but requires careful thermal pad design for >100 W sustained dissipation. | Select SMBJ64CA when board real estate is limited and peak surge energy is ≤600 W; verify layout thermal relief matches RθJA = 40 °C/W. |
| 1.5SMC68CA | SMA package; same PPPM (1500 W); VBR = 64.6–71.4 V; identical VC (92 V); slightly higher leakage (5 µA max) | Surface-mount variant with smaller footprint; lower thermal mass limits repetitive surge duty cycle vs. axial 1.5KE. | Choose 1.5SMC68CA for automated SMT assembly where axial leads are incompatible; confirm pulse repetition rate stays below 0.01% duty cycle. |
Compared with 1.5KE68CA/54, SMBJ64CA offers compact SMT integration at reduced surge capacity, while 1.5SMC68CA matches peak power but trades axial mechanical robustness and lead-based thermal conduction for surface-mount scalability - all three maintain equivalent clamping performance for 68 V-class bidirectional protection.
Availability
1.5KE68CA/54 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body electronics, and telecom power feed applications requiring stable component supply, long-lifecycle support, and traceable sourcing for production programs.
Supply support for 1.5KE68CA/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, efficiency, and automotive-grade qualification.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - targeting industrial automation, transportation, and infrastructure systems where failure resilience and long-term parametric stability are mandatory.
FAQ
What is the breakdown voltage range of the 1.5KE68CA/54?
The 1.5KE68CA/54 has a guaranteed breakdown voltage (VBR) range of 64.6 V to 71.4 V at 1 mA test current, measured per JEDEC standard. This tight ±5% tolerance ensures predictable clamping behavior across production lots and temperature extremes, making the 1.5KE68CA/54 suitable for precision overvoltage protection in regulated DC systems where margin above nominal voltage must be strictly controlled.
Is the 1.5KE68CA/54 suitable for automotive applications?
Yes - the 1.5KE68CA/54 is offered in AEC-Q101 qualified variants (e.g., 1.5KE68CAHE3_B). While the base 1.5KE68CA/54 is commercial-grade, its construction - glass-passivated junction, UL 94 V-0 epoxy, and –55 °C to +175 °C operating range - meets core automotive environmental requirements. For certified deployment, specify the HE3 suffix version to ensure qualification to AEC-Q101 stress tests including HTRB, HTGB, and temperature cycling.
How does the 1.5KE68CA/54 differ from unidirectional 1.5KE68A?
The 1.5KE68CA/54 is bidirectional, meaning it clamps transients of either polarity symmetrically, with identical VBR, VC, and leakage characteristics in both directions. In contrast, the unidirectional 1.5KE68A has a cathode band, conducts only in reverse bias, and exhibits forward voltage drop (~3.5 V) under positive surge. The 1.5KE68CA/54 is selected for AC lines, differential buses, or any application where polarity reversal or bipolar transients are possible - unlike the 1.5KE68A, which is used on DC rails with defined ground reference.
What is the maximum clamping voltage of the 1.5KE68CA/54 during a surge event?
The 1.5KE68CA/54 clamps to a maximum of 92.0 V at its rated peak pulse current of 16.3 A (10/1000 µs waveform). This value - specified as VC - represents the worst-case voltage imposed on protected circuitry during full-power transient suppression. Designers use this figure to verify that downstream components (e.g., MOSFETs, regulators, microcontrollers) remain within their absolute maximum voltage ratings when the 1.5KE68CA/54 is activated.
Can the 1.5KE68CA/54 be used in parallel for higher surge capacity?
Parallel connection of 1.5KE68CA/54 devices is not recommended without external balancing - minor VBR mismatches cause uneven current sharing, risking thermal runaway in one unit. For higher surge handling, select a single higher-rated device (e.g., 1.5KE75CA) or implement staged protection (e.g., pre-filter + TVS). If parallel use is unavoidable, include matched-series resistors (≤0.1 Ω) per leg and validate with surge testing per IEC 61000-4-5 to confirm balanced clamping behavior of the 1.5KE68CA/54 array.
1.5KE68CA/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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 58.1V
- Voltage - Breakdown (Min):
- 64.6V
- Voltage - Clamping (Max) @ Ipp:
- 92V
- Current - Peak Pulse (10/1000µs):
- 16.3A
- 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
1.5KE68CA/54 FAQ
1.How can I place an order for 1.5KE68CA/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE68CA/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 1.5KE68CA/54 reliable?
The price and inventory of 1.5KE68CA/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE68CA/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE68CA/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE68CA/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE68CA/54?
1.5KE68CA/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE68CA/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 1.5KE68CA/54?
For technical support, including 1.5KE68CA/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE68CA/54 requirements.
6.How does Aetrix verify that 1.5KE68CA/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE68CA/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 1.5KE68CA/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE68CA/54?
All 1.5KE68CA/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE68CA/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 1.5KE68CA/54 part is unused and in its original packaging.
Return procedure for 1.5KE68CA/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE68CA/54 Tags
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