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Vishay General Semiconductor - Diodes Division 1.5KE68CAHE3/51
- Part No.:
- 1.5KE68CAHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE68CAHE3/51.pdf
- Description:
- TVS DIODE 58.1VWM 92VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,110
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Product details
Overview
1.5KE68CAHE3/51 from Vishay General Semiconductor is a bi-directional 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 stand-off voltage (VWM), 92.0 V clamping voltage (VC) at 16.3 A peak pulse current, 1500 W peak pulse power (10/1000 µs), and AEC-Q101 qualification - enabling use in automotive power supply rail protection.
For engineers reviewing the 1.5KE68CAHE3/51 datasheet, 1.5KE68CAHE3/51 pinout, 1.5KE68CAHE3/51 application, or 1.5KE68CAHE3/51 equivalent, this part serves as a RoHS-compliant, lead-free, high-reliability TVS for transient suppression on DC bus lines, sensor interfaces, and ECU input stages where fast clamping (<1 ns), low leakage (<1 µA), and stable thermal performance up to +175 °C are required.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction ensures stable VBR tolerance (±5%), low incremental surge resistance, and excellent clamping linearity under 10/1000 µs transients.
The device uses a DO-201AD package with axial leads, rated for 200 A non-repetitive forward surge (IFSM) and 6.5 W steady-state power dissipation at TL = 75 °C. Thermal resistance is 15.4 °C/W junction-to-lead, supporting reliable operation in thermally constrained automotive and industrial environments.
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. |
| VWM | 58.1 V - Maximum continuous working voltage before leakage exceeds 1 µA; defines safe DC bias margin. |
| VC @ IPPM | 92.0 V at 16.3 A - Clamped voltage during 1500 W transient; limits downstream component stress to ≤92 V. |
| PPPM | 1500 W (10/1000 µs) - Withstands high-energy surges common in automotive load-dump and ISO 7637-2 pulses. |
| IPPM | 16.3 A - Peak current capability directly tied to system-level surge test compliance (e.g., IEC 61000-4-5). |
| TJ max | +175 °C - Enables placement near hot components (e.g., power MOSFETs, DC-DC converters) without derating. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing. |
Pinout & Package
Package: DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body meeting UL 94 V-0; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Bi-directional symmetry means either terminal functions as anode or cathode depending on polarity of transient. |
| Cathode | Current exit point in forward bias | No color band marking - consistent with bi-directional construction; terminals are electrically interchangeable. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables ±5% VBR tolerance and long-term stability under thermal cycling and humidity exposure. |
| 1500 W peak pulse power (10/1000 µs) | Meets ISO 7637-2 Pulse 5a (load dump) requirements for 12 V automotive systems without external series impedance. |
| Response time < 1 ns | Clamps transients before sensitive ICs (e.g., CAN transceivers, microcontrollers) experience damaging overvoltage. |
| AEC-Q101 qualification | Validated for automotive under-hood applications including engine control units, body controllers, and ADAS sensors. |
| RoHS-compliant HE3 suffix | Meets JESD 201 Class 2 whisker resistance and supports lead-free reflow soldering up to 275 °C for 10 s. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load-dump transients (ISO 7637-2 Pulse 5a) and alternator switching spikes. IC Role / Device Role / Timing Role: Primary clamping device placed at main power input, operating in bi-directional mode to suppress both positive and negative voltage excursions. Use Value: Limits rail voltage to ≤92 V during 1500 W surges, preventing latch-up or destruction of downstream LDOs and microcontrollers. |
Use Scenario: Shielding analog and digital sensor outputs (e.g., pressure, temperature, position) from ESD and inductive kickback in factory automation PLCs. IC Role / Device Role / Timing Role: Point-of-entry TVS on twisted-pair or shielded cable inputs, shunting transients before signal conditioning circuitry. Use Value: Sub-1 ns response prevents >100 V transients from propagating into op-amp front-ends or ADC reference paths. |
| Telecom Line Surge Protection | Consumer Power Adapter Input Stage |
Use Scenario: Safeguarding Ethernet PHY power pins and auxiliary rails in outdoor telecom base stations exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-level TVS after gas discharge tube (GDT) primary protection, handling residual energy in 10/1000 µs waveform. Use Value: 92.0 V clamping ensures PoE controller ICs (e.g., IEEE 802.3af/at) remain within absolute maximum ratings during surge events. |
Use Scenario: Overvoltage clamp on AC-DC adapter primary-side rectifier output or secondary-side 5 V/12 V rails in smart home hubs and set-top boxes. IC Role / Device Role / Timing Role: Standalone transient suppressor on unregulated DC bus, activated only during rare surge events (e.g., mains overvoltage, capacitor failure). Use Value: 58.1 V VWM provides 20% margin above nominal 48 V or 54 V adapter outputs, minimizing standby leakage and self-heating. |
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 (3.5 mm × 4.6 mm), higher VC (103 V @ 5.8 A) | Better suited for space-constrained PCBs but insufficient for full ISO 7637-2 Pulse 5a compliance without derating. | Select when board area is critical and surge energy is limited to ≤600 W (e.g., low-power IoT nodes). |
| 1.5KE68AHE3/51 | Uni-directional variant; same VBR, VWM, VC, and PPPM, but includes cathode band marking and forward VF = 3.5 V. | Required only where DC polarity is fixed and reverse-bias blocking is needed (e.g., single-rail DC supplies with ground-referenced loads). | Choose 1.5KE68AHE3/51 if circuit topology mandates uni-directional behavior or if forward conduction must be characterized. |
Compared with SMBJ64CA and 1.5KE68AHE3/51, the 1.5KE68CAHE3/51 uniquely delivers full 1500 W bi-directional clamping in a through-hole package qualified for automotive under-hood use - making it the only option among the three that satisfies AEC-Q101 and ISO 7637-2 Pulse 5a without design compromise.
Availability
1.5KE68CAHE3/51 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom infrastructure requiring stable component supply, long-lifecycle support, and AEC-Q101-qualified surge protection.
Supply support for 1.5KE68CAHE3/51 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5KE family was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where failure due to voltage surges must be eliminated through proven, standardized, and qualification-backed devices.
FAQ
What is the clamping voltage of the 1.5KE68CAHE3/51 under standard test conditions?
The 1.5KE68CAHE3/51 has a maximum clamping voltage (VC) of 92.0 V at 16.3 A peak pulse current (IPPM) using a 10/1000 µs waveform. This value is measured per JEDEC standards and reflects the actual voltage seen by protected circuitry during worst-case transient events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is the 1.5KE68CAHE3/51 suitable for automotive applications?
Yes, the 1.5KE68CAHE3/51 is AEC-Q101 qualified and specifically rated for automotive under-hood use. Its +175 °C maximum junction temperature, glass-passivated junction, and 1500 W pulse rating meet ISO 7637-2 Pulse 5a requirements for 12 V systems. The HE3 suffix confirms RoHS compliance and JESD 201 Class 2 whisker resistance for lead-free assembly.
How does the bi-directional functionality of the 1.5KE68CAHE3/51 affect its circuit placement?
The 1.5KE68CAHE3/51 has no polarity marking and operates identically in both directions - meaning it can be placed across any two nodes without regard to orientation. This simplifies layout in AC-coupled lines, differential buses, or floating power domains where transient polarity is unpredictable, eliminating risk of incorrect installation during manufacturing.
What is the standoff voltage (VWM) of the 1.5KE68CAHE3/51, and why does it matter?
The 1.5KE68CAHE3/51 has a maximum working voltage (VWM) of 58.1 V, which is the highest continuous DC or RMS voltage the device can withstand without exceeding 1 µA leakage. This parameter defines the safe operating margin below breakdown - for example, it allows direct placement on a 48 V nominal bus with 20% headroom, preventing unnecessary power loss or thermal drift.
Does the 1.5KE68CAHE3/51 require a heatsink for standard operation?
No heatsink is required for transient suppression duty cycles (e.g., <0.01% duty cycle per datasheet), as the 1.5KE68CAHE3/51 dissipates only 6.5 W continuously at TL = 75 °C. Its 15.4 °C/W junction-to-lead thermal resistance enables adequate self-cooling via PCB copper and lead conduction - typical for through-hole TVS devices used in surge-only protection roles.
1.5KE68CAHE3/51 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE68CAHE3/51 FAQ
1.How can I place an order for 1.5KE68CAHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE68CAHE3/51 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 1.5KE68CAHE3/51 reliable?
The price and inventory of 1.5KE68CAHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE68CAHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE68CAHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE68CAHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE68CAHE3/51?
1.5KE68CAHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE68CAHE3/51 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 1.5KE68CAHE3/51?
For technical support, including 1.5KE68CAHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE68CAHE3/51 requirements.
6.How does Aetrix verify that 1.5KE68CAHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE68CAHE3/51 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 1.5KE68CAHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE68CAHE3/51?
All 1.5KE68CAHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE68CAHE3/51, 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 1.5KE68CAHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KE68CAHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE68CAHE3/51 Tags
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