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Vishay General Semiconductor - Diodes Division 1.5KE6.8CAHE3/51
- Part No.:
- 1.5KE6.8CAHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE6.8CAHE3/51.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,879
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Product details
Overview
1.5KE6.8CAHE3/51 from Vishay General Semiconductor is a bi-directional Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in sensitive signal and power lines. It features a 6.45 V minimum breakdown voltage (VBR), 10.5 V maximum clamping voltage (VC) at 143 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs), and AEC-Q101 qualification - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the 1.5KE6.8CAHE3/51 datasheet, 1.5KE6.8CAHE3/51 pinout, 1.5KE6.8CAHE3/51 application, or 1.5KE6.8CAHE3/51 equivalent, this page delivers verified electrical parameters, package dimensions, clamping behavior under transient stress, thermal derating curves, and validated alternative parts for design continuity and supply resilience.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with identical VBR, VWM, and VC specifications in forward and reverse directions. Its glass-passivated junction enables fast response (<1 ns) and low incremental surge resistance, critical for protecting MOSFET gates and IC inputs against ESD and lightning-induced transients.
The device uses a DO-201AD (Case Style 1.5KE) axial-leaded package with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102. It supports 175 °C maximum junction temperature, 75 °C/W junction-to-ambient thermal resistance, and is rated for 0.01% duty cycle repetitive surge events per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 6.45 V min / 7.14 V max at 10 mA - defines precise voltage threshold where clamping initiates |
| Stand-off Voltage VWM | 5.80 V - maximum continuous working voltage before leakage exceeds 1000 µA |
| Clamping Voltage VC | 10.5 V at 143 A (10/1000 µs) - limits transient voltage seen by protected circuitry |
| Peak Pulse Power PPPM | 1500 W - sustains single 1 ms surge without failure; derates linearly above 25 °C ambient |
| Peak Pulse Current IPPM | 143 A - maximum non-repetitive surge current capability under standardized waveform |
| Junction Temperature Range | –55 °C to +175 °C - enables operation in under-hood automotive and industrial environments |
| AEC-Q101 Qualified | Yes - 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 flammability rating; leads are matte tin plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (bi-directional) | Transient conduction path | No polarity marking; symmetrical terminals conduct equally in either direction during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables <1 ns response time and stable VBR tolerance over lifetime and temperature |
| 1500 W peak pulse power (10/1000 µs) | Protects against high-energy surges such as ISO 7637-2 Pulse 5a/b and IEC 61000-4-5 Level 4 |
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| Low clamping ratio (VC/VBR ≈ 1.55) | Minimizes voltage overshoot during clamping, reducing stress on downstream ICs like CAN transceivers |
| RoHS-compliant HE3 suffix | Meets JESD 201 Class 2 whisker resistance and supports lead-free reflow and wave soldering |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in engine bay modules exposed to load dump and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Bi-directional TVS placed across signal line and ground to clamp ±100 V spikes within nanoseconds. Use Value: Prevents latch-up or gate oxide damage in op-amps and ADC front-ends while maintaining signal integrity below 5.8 V operating range. |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between input terminal and common rail to absorb repetitive 1 kV/40 Ω transients. Use Value: Eliminates need for external series impedance or RC filtering, enabling direct connection to microcontroller GPIO with no signal delay. |
| Telecom Line Interface | Consumer Power Supply Input |
|
Use Scenario: Safeguarding RS-485 transceivers and Ethernet PHYs on outdoor telecom equipment subject to lightning-induced surges on twisted-pair lines. IC Role / Device Role / Timing Role: Bi-directional clamping element placed differential-mode across A/B lines and common-mode to chassis ground. Use Value: Maintains signal fidelity up to 10 Mbps while limiting common-mode transients to <10.5 V, preserving receiver common-mode range. |
Use Scenario: Secondary-side overvoltage suppression on 5 V/12 V DC outputs of wall adapters and USB PD power supplies. IC Role / Device Role / Timing Role: Fast-acting shunt protector triggered by output capacitor overcharge or regulator fault conditions. Use Value: Limits output voltage excursion to ≤10.5 V during fault, preventing damage to connected smartphones, IoT hubs, and peripherals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8CA | Lower PPPM (600 W), smaller SMB package (3.5 mm x 3.5 mm), higher VC (11.5 V @ 53.3 A) | Better suited for space-constrained PCBs; less effective for high-energy surges like load dump | Select when board area is limited and surge energy remains ≤600 W; verify thermal margin with RθJA = 110 °C/W |
| 1.5KE6.8C | Same 1500 W rating and DO-201AD package, but commercial-grade (non-AEC-Q101), E3 suffix only | Lacks automotive qualification; suitable for industrial/commercial systems with lower reliability requirements | Choose for cost-sensitive non-automotive designs where AEC-Q101 is not mandated and full HE3 qualification is unnecessary |
Compared with SMBJ6.8CA and 1.5KE6.8C, the 1.5KE6.8CAHE3/51 uniquely combines AEC-Q101 qualification, 1500 W surge capacity, and DO-201AD mechanical robustness - making it the only option qualified for under-hood automotive use with full 1 ms transient immunity.
Availability
1.5KE6.8CAHE3/51 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and telecom line surge suppression requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 1.5KE6.8CAHE3/51 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 optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
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.
FAQ
What is the clamping voltage of the 1.5KE6.8CAHE3/51 under a 10/1000 µs surge?
The 1.5KE6.8CAHE3/51 clamps to a maximum of 10.5 V when subjected to its rated peak pulse current of 143 A using the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and ensures downstream components see no more than 10.5 V during transient events - critical for protecting 5 V and 3.3 V logic interfaces. The 1.5KE6.8CAHE3/51 achieves this with minimal overshoot due to its low incremental surge resistance.
Is the 1.5KE6.8CAHE3/51 suitable for automotive applications?
Yes, the 1.5KE6.8CAHE3/51 is AEC-Q101 qualified and specifically tested for automotive reliability, including temperature cycling, high-temperature reverse bias, and ESD. Its –55 °C to +175 °C operating range and DO-201AD mechanical robustness make it appropriate for engine control units, body electronics, and ADAS sensor modules. The 1.5KE6.8CAHE3/51 meets ISO 7637-2 Pulse 1, 2a, 3a/b, and 5a/b requirements when properly mounted.
How does the bi-directional configuration of the 1.5KE6.8CAHE3/51 affect its usage?
The bi-directional configuration means the 1.5KE6.8CAHE3/51 has identical electrical characteristics in both polarities - no cathode marking, no polarity sensitivity. It clamps transients regardless of direction, making it ideal for AC-coupled signal lines, differential buses (e.g., RS-485), and ungrounded power rails. Unlike uni-directional variants, the 1.5KE6.8CAHE3/51 eliminates risk of incorrect orientation during assembly and simplifies layout for symmetric protection schemes.
What is the maximum steady-state power dissipation of the 1.5KE6.8CAHE3/51?
The 1.5KE6.8CAHE3/51 has a maximum steady-state power dissipation (PD) of 6.5 W when mounted on an infinite heatsink at lead temperature (TL) = 75 °C. At ambient temperature (TA) = 25 °C, derating begins linearly beyond 25 °C per the power derating curve in Figure 5. This rating governs continuous leakage and thermal management in high-humidity or enclosed environments where sustained reverse-bias stress may occur. The 1.5KE6.8CAHE3/51 must be thermally anchored to maintain safe junction temperatures.
Does the 1.5KE6.8CAHE3/51 have RoHS and lead-free compliance?
Yes, the HE3 suffix indicates the 1.5KE6.8CAHE3/51 is RoHS-compliant and meets JESD 201 Class 2 whisker resistance requirements. Its matte tin-plated leads are compatible with lead-free reflow and wave soldering processes per J-STD-002 and JESD 22-B102. The molding compound satisfies UL 94 V-0 flammability, and the entire construction adheres to Vishay's material categorization per doc# 99912. The 1.5KE6.8CAHE3/51 is fully compliant for modern electronics manufacturing.
1.5KE6.8CAHE3/51 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):
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE6.8CAHE3/51 FAQ
1.How can I place an order for 1.5KE6.8CAHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE6.8CAHE3/51 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 1.5KE6.8CAHE3/51 reliable?
The price and inventory of 1.5KE6.8CAHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE6.8CAHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE6.8CAHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE6.8CAHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE6.8CAHE3/51?
1.5KE6.8CAHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE6.8CAHE3/51 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 1.5KE6.8CAHE3/51?
For technical support, including 1.5KE6.8CAHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE6.8CAHE3/51 requirements.
6.How does Aetrix verify that 1.5KE6.8CAHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE6.8CAHE3/51 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 1.5KE6.8CAHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE6.8CAHE3/51?
All 1.5KE6.8CAHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE6.8CAHE3/51, 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 1.5KE6.8CAHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KE6.8CAHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE6.8CAHE3/51 Tags
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