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Vishay General Semiconductor - Diodes Division 1.5KE68CA-E3/51
- Part No.:
- 1.5KE68CA-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE68CA-E3/51.pdf
- Description:
- TVS DIODE 58.1VWM 92VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,024
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Product details
Overview
1.5KE68CA-E3/51 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 maximum standoff voltage (VWM), 92.0 V clamping voltage 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 surges and inductive switching transients in industrial and automotive systems.
For engineers reviewing the 1.5KE68CA-E3/51 datasheet, 1.5KE68CA-E3/51 pinout, 1.5KE68CA-E3/51 application, or 1.5KE68CA-E3/51 equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, JEDEC 1.5KE package details, thermal derating curves, and direct alternatives with documented parameter differences - all critical for surge protection layout validation and BOM selection.
Technical Context
This device implements an avalanche breakdown-based transient suppression mechanism with glass-passivated junction construction, enabling sub-nanosecond response time (<1 ns) and low incremental surge resistance. Its bidirectional symmetry ensures identical clamping performance in both polarities, eliminating polarity marking on the case and simplifying PCB placement in AC-coupled or floating signal paths.
The 1.5KE68CA-E3/51 is rated for 1500 W peak pulse power under standardized 10/1000 µs waveform conditions, with thermal derating starting above 25 °C ambient and full power limited to TL = 75 °C on infinite heatsink. Its 75 °C/W junction-to-ambient thermal resistance and 15.4 °C/W junction-to-lead resistance define its power handling under real-world board-level thermal constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V - Ensures reliable conduction onset above normal operating voltage while avoiding false triggering during transients. |
| VWM | 58.1 V - Maximum continuous reverse working voltage; defines safe DC/AC RMS operating limit before leakage increases. |
| VC @ IPPM | 92.0 V at 16.3 A - Clamped voltage seen by protected circuit during worst-case 1500 W surge; determines downstream component stress. |
| PPPM | 1500 W - Peak pulse power handling capability per 10/1000 µs waveform; sets surge energy absorption ceiling. |
| IPPM | 16.3 A - Peak pulse current corresponding to VC; used to size series impedance and verify trace current capacity. |
| TJ range | –55 °C to +175 °C - Enables deployment in under-hood automotive, industrial motor drives, and outdoor telecom equipment. |
| Package | JEDEC 1.5KE - Axial-leaded DO-201AD package with 0.375" lead length; compatible with through-hole wave soldering and manual rework. |
Pinout & Package
JEDEC 1.5KE package: axial-leaded, molded epoxy body (UL 94 V-0), matte tin-plated leads, no polarity marking for bidirectional operation. Leads are solderable per J-STD-002 and JESD 22-B102; qualified to JESD 201 Class 1A whisker test (E3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (unmarked) | Bidirectional terminal pair | Identical avalanche conduction in both directions; no cathode band; terminals interchangeable in PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable, repeatable avalanche breakdown and long-term reliability under repetitive surge stress. |
| 1500 W peak pulse power (10/1000 µs) | Supports protection of 24 V and 48 V industrial bus lines against IEC 61000-4-5 Level 4 surges without cascading devices. |
| <1 ns response time | Clamps transients before sensitive CMOS inputs or gate drivers experience damaging overvoltage. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD or lightning-induced edges), improving protection margin. |
| RoHS-compliant, commercial grade (E3) | Fulfills environmental compliance for global industrial and consumer product certifications without requiring AEC-Q101 qualification. |
Applications
| Industrial Motor Drive Control | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protection of microcontroller GPIOs and CAN transceiver power rails against load dump and alternator ripple spikes. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector entry point to clamp ±100 V transients before they reach LDOs and interface ICs. Use Value: Prevents latch-up and gate oxide damage in 3.3 V/5 V logic circuits during 12 V system surges up to 1500 W peak. |
Use Scenario: Shielding LIN bus transceivers and sensor supply lines from battery reverse connection and jump-start transients. IC Role / Device Role / Timing Role: Standoff-rated TVS (VWM = 58.1 V) placed between VBAT and GND to absorb 12 V/24 V system-level surges. Use Value: Maintains functional safety integrity by limiting voltage excursions to ≤92.0 V during 100 ms load dump events. |
| Telecom Power Supply Input | Consumer Appliance Sensor Interface |
Use Scenario: Safeguarding AC-DC converter primary-side control ICs and optocoupler feedback paths from lightning-induced common-mode surges on mains input. IC Role / Device Role / Timing Role: Bidirectional TVS connected line-to-line and line-to-ground to suppress differential and common-mode transients per IEC 61000-4-5. Use Value: Enables compliance with EN 61000-4-5 Level 3 (2 kV/4 kV) without additional MOV or gas discharge tube staging. |
Use Scenario: Protecting analog front-end ADC inputs and thermistor bias networks in smart HVAC controllers from ESD and relay coil flyback. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ < 100 pF typical) placed adjacent to sensor connector to minimize signal distortion. Use Value: Preserves measurement accuracy by limiting clamping voltage to 92.0 V while adding <0.5 pF parasitic capacitance to signal path. |
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 | Lower PPPM (600 W), smaller SMB package (surface-mount), lower VC (104 V), tighter VBR tolerance (64.0–71.1 V). | Preferred for space-constrained PCBs where 600 W surge rating suffices; not suitable for high-energy 1500 W IEC 61000-4-5 testing. | Select when board area is limited and peak surge energy is ≤600 W; verify thermal pad design for SMB thermal dissipation. |
| 1.5KE68A-E3/51 | Unidirectional version; same VBR, VWM, VC, and PPPM, but includes cathode band marking and forward voltage (VF = 3.5 V @ 100 A). | Required only where DC-biased lines demand asymmetric clamping (e.g., single-polarity power rails); adds polarity sensitivity and layout constraint. | Choose only if circuit topology mandates unidirectional clamping; otherwise, 1.5KE68CA-E3/51 offers greater layout flexibility and eliminates polarity errors. |
Compared with SMBJ64CA, the 1.5KE68CA-E3/51 delivers 2.5× higher surge energy handling in a through-hole package ideal for high-reliability industrial connectors; versus 1.5KE68A-E3/51, it removes polarity dependency and simplifies assembly - making it optimal for floating or AC-coupled protection points where bidirectional symmetry is essential.
Availability
1.5KE68CA-E3/51 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body electronics, telecom power supplies, and consumer appliance sensor interfaces requiring stable component supply and long-term obsolescence management.
Supply support for 1.5KE68CA-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 diodes, rectifiers, TVS devices, and power MOSFETs with emphasis on ruggedness, reliability, and application-specific optimization.
The 1.5KE family was engineered for high-energy transient suppression in harsh environments - targeting industrial automation, automotive subsystems, and infrastructure equipment where failure due to voltage surges must be eliminated.
FAQ
What is the clamping voltage of the 1.5KE68CA-E3/51 under maximum surge conditions?
The 1.5KE68CA-E3/51 exhibits a maximum clamping voltage (VC) of 92.0 V when subjected to its rated peak pulse current of 16.3 A, measured using the standard 10/1000 µs waveform. This value represents the highest voltage imposed on the protected circuit during a full 1500 W transient event and is critical for verifying downstream component voltage ratings. The 1.5KE68CA-E3/51 maintains this clamping performance symmetrically in both directions due to its bidirectional construction.
Does the 1.5KE68CA-E3/51 have polarity markings on the package?
No, the 1.5KE68CA-E3/51 does not feature a cathode band or any polarity marking because it is a bidirectional TVS diode. Its internal structure provides identical avalanche characteristics in both directions, allowing either lead to serve as anode or cathode depending on instantaneous voltage polarity. This eliminates orientation errors during manual or automated assembly and simplifies routing in AC or floating signal paths where polarity is undefined.
What is the maximum operating temperature range for the 1.5KE68CA-E3/51?
The 1.5KE68CA-E3/51 is rated for a junction temperature range of –55 °C to +175 °C, enabling use in extreme environments such as under-hood automotive modules, industrial inverters, and outdoor telecom enclosures. Its glass-passivated junction and epoxy molding ensure stability across this full range, with thermal derating applied above 25 °C ambient per Figure 2 in the Vishay datasheet 88301. The 1.5KE68CA-E3/51 retains full 1500 W surge capability only up to TL = 75 °C on infinite heatsink.
How does the 1.5KE68CA-E3/51 differ from the unidirectional 1.5KE68A-E3/51?
The 1.5KE68CA-E3/51 is bidirectional with symmetrical clamping in both polarities and no polarity marking, whereas the 1.5KE68A-E3/51 is unidirectional with a visible cathode band and conducts only in reverse bias. Both share identical VBR, VWM, VC, and PPPM specs, but the unidirectional version specifies forward voltage (VF = 3.5 V @ 100 A) and supports forward conduction - a feature irrelevant for pure transient suppression. The 1.5KE68CA-E3/51 is preferred for AC lines, differential pairs, or any application where voltage polarity reverses.
Is the 1.5KE68CA-E3/51 RoHS compliant and lead-free?
Yes, the 1.5KE68CA-E3/51 carries the "E3" suffix, indicating full RoHS compliance per Directive 2011/65/EU and lead-free termination. Its matte tin-plated leads meet J-STD-002 solderability requirements and JESD 201 Class 1A whisker test standards. The device contains no exempted lead, cadmium, mercury, hexavalent chromium, PBB, or PBDE, and is suitable for environmentally regulated industrial and consumer products without restriction.
1.5KE68CA-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:
- -
- 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-E3/51 FAQ
1.How can I place an order for 1.5KE68CA-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE68CA-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 1.5KE68CA-E3/51 reliable?
The price and inventory of 1.5KE68CA-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 1.5KE68CA-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE68CA-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE68CA-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE68CA-E3/51?
1.5KE68CA-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE68CA-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 1.5KE68CA-E3/51?
For technical support, including 1.5KE68CA-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE68CA-E3/51 requirements.
6.How does Aetrix verify that 1.5KE68CA-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE68CA-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 1.5KE68CA-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE68CA-E3/51?
All 1.5KE68CA-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE68CA-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 1.5KE68CA-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE68CA-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE68CA-E3/51 Tags
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