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Taiwan Semiconductor Corporation 1.5KE68A
- Part No.:
- 1.5KE68A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE68A.pdf
- Description:
- TVS 1500W 68V 5% UNIDIR DO-201
- Quantity:
- Payment:
- Shipping:
Inventory:3,853
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Product details
Overview
1.5KE68A from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode with a nominal breakdown voltage of 68V, minimum VBR of 64.6V at 1mA test current, maximum clamping voltage of 92.0V at 17A peak pulse current, and DO-201 axial package - designed for automotive-grade ESD and load-dump protection in power supply rails and I/O interfaces.
For engineers reviewing the 1.5KE68A datasheet, 1.5KE68A pinout, 1.5KE68A application, or 1.5KE68A equivalent, key selection criteria include its AEC-Q101 qualification, 10/1000μs surge rating, low dynamic impedance, <1.0ps response time, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity requirements.
Technical Context
The 1.5KE68A operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 64.6–71.4V breakdown range to clamp transients while limiting forward voltage to ≤3.5V at 50A. Its junction temperature range spans −55°C to +175°C, enabling use in under-hood automotive environments.
It delivers 1500W peak pulse power per 10/1000μs waveform, with thermal derating above 25°C ambient and a maximum steady-state power dissipation of 5W at 75°C lead temperature. Polarity is marked by a cathode band, and leakage current remains below 1μA at 58.1V working stand-off voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1mA | 64.6V min / 71.4V max - defines precise avalanche initiation threshold for reliable overvoltage detection |
| VWM | 58.1V - maximum continuous reverse operating voltage before leakage exceeds 1μA |
| VC @ IPP = 17A | 92.0V - clamped voltage during worst-case 10/1000μs surge, limiting downstream IC stress |
| PPK | 1500W - peak transient energy handling capacity per JEDEC standard waveform |
| TJ Range | −55°C to +175°C - supports operation in harsh automotive and industrial ambient conditions |
| Response Time | <1.0ps - enables sub-nanosecond suppression of ESD and fast-rising transients |
| AEC-Q101 Qualified | Yes - validated for automotive electronic systems per stress-test requirements |
Pinout & Package
Package: DO-201 axial leaded case with cathode band marking; RoHS-compliant, halogen-free molding compound; pure tin-plated leads solderable per J-STD-002; weight ≈0.090g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 12V rail); cathode band identifies polarity for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics including engine control units and body modules |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (ESD coupling) |
| Low dynamic impedance | Enables tight clamping with minimal voltage overshoot during high-di/dt events |
| 10/1000μs surge rating | 1500W capability ensures robustness against battery load-dump and alternator surges |
| UL 94V-0 flammability rating | Molding compound meets safety standards for enclosed automotive and industrial enclosures |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12V/24V vehicle power distribution networks from load-dump transients up to 120V. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery rail and DC-DC converter input. Use Value: Limits clamped voltage to 92.0V during 17A surge, preventing damage to downstream PMICs and microcontrollers. |
Use Scenario: Shielding analog sensor inputs (e.g., pressure, temperature) from EFT and ESD in factory automation PLCs. IC Role / Device Role / Timing Role: Front-end transient suppressor on signal lines entering isolated ADC front-ends. Use Value: Sub-1ps response ensures suppression before sensitive op-amps or SAR ADCs experience overstress. |
| LED Lighting Driver Protection | Telecom Power Supply Input |
Use Scenario: Safeguarding constant-current LED drivers in streetlight systems exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Parallel-connected TVS across input terminals to absorb 10/1000μs line surges. Use Value: 1500W rating handles multi-kV induced transients without degradation over 100,000+ cycles. |
Use Scenario: Input-stage protection for 48V telecom rectifiers subjected to AC line switching transients. IC Role / Device Role / Timing Role: Primary clamping element upstream of bulk capacitors and active rectification stages. Use Value: 58.1V VWM allows stable operation across full 48V ±10% input range while blocking leakage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64A | Lower peak power (600W), SMC package, 64V VBR (60.8–67.2V), 100A IPP at 10/1000μs | Better suited for space-constrained PCBs but lacks AEC-Q101 and ISO 7637-2 validation | Select SMBJ64A only for non-automotive, cost-sensitive designs where 1500W headroom is unnecessary |
| 1.5KE68CA | Bidirectional variant, same VBR range (64.6–71.4V), identical DO-201 package and 1500W rating | Required for AC-coupled or dual-polarity signal lines (e.g., RS-485, CAN bus) where reverse polarity surges occur | Choose 1.5KE68CA only when protecting bidirectional data lines; 1.5KE68A is optimal for DC power rails |
Compared with SMBJ64A, the 1.5KE68A offers triple the surge power and automotive qualification; versus 1.5KE68CA, it provides lower capacitance and optimized unidirectional clamping for power rail use - making it the preferred choice for 12V/24V automotive and industrial DC system protection.
Availability
1.5KE68A is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, LED driver power supplies, and telecom rectifier inputs requiring stable component supply with long-term lifecycle support.
Supply support for 1.5KE68A 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, and rectifiers with global automotive and industrial certifications.
The 1.5KE series was developed specifically for high-energy transient suppression in automotive and industrial power systems, emphasizing AEC-Q101 reliability, ISO 7637-2 immunity, and robust DO-201 packaging for thermal and mechanical durability.
FAQ
What is the breakdown voltage tolerance of the 1.5KE68A?
The 1.5KE68A has a specified breakdown voltage range of 64.6V to 71.4V at 1mA test current, corresponding to ±5% tolerance around the nominal 68V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports predictable circuit protection design margins in the 1.5KE68A.
Is the 1.5KE68A suitable for automotive applications?
Yes, the 1.5KE68A is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity standards - confirming its suitability for under-hood and chassis-mounted automotive electronics where load-dump and switching surges are common. The 1.5KE68A's −55°C to +175°C operating range further validates its automotive readiness.
What is the maximum clamping voltage of the 1.5KE68A during a surge event?
The 1.5KE68A exhibits a maximum clamping voltage (VC) of 92.0V at 17A peak pulse current under the standard 10/1000μs waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case transient events and is critical for ensuring downstream components like MCUs and PMICs remain within their absolute maximum ratings when the 1.5KE68A is deployed.
Does the 1.5KE68A have polarity markings, and how is it oriented on the PCB?
Yes, the 1.5KE68A uses a DO-201 package with a visible cathode band marking one end of the axial body. During PCB layout, the banded end must connect to the line being protected (e.g., 12V rail), while the unbanded (anode) end connects to ground or the return path - ensuring proper unidirectional clamping action. Incorrect orientation renders the 1.5KE68A ineffective for reverse-transient suppression.
How does the 1.5KE68A compare to the 1.5KE68 (non-A suffix) version?
The 1.5KE68A differs from the base 1.5KE68 in tighter VBR tolerance (64.6–71.4V vs. 61.2–74.8V), lower leakage (1μA at 58.1V vs. 1μA at 55.1V), and improved clamping performance (92.0V vs. 98.0V at rated IPP). These enhancements make the 1.5KE68A preferable for precision protection schemes where margin and consistency are critical - especially in the 1.5KE68A's target automotive and industrial applications.
1.5KE68A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- 1.5KE
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 58.1V
- Voltage - Breakdown (Min):
- 64.6V
- Voltage - Clamping (Max) @ Ipp:
- 92V
- Current - Peak Pulse (10/1000µs):
- 17A
- 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:
- DO-201
1.5KE68A FAQ
1.How can I place an order for 1.5KE68A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE68A 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 1.5KE68A reliable?
The price and inventory of 1.5KE68A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE68A is usually 5 days.
3.What payment methods are accepted for 1.5KE68A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE68A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE68A?
1.5KE68A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE68A 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 1.5KE68A?
For technical support, including 1.5KE68A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE68A requirements.
6.How does Aetrix verify that 1.5KE68A is sourced from the original manufacturer or authorized distributors?
All 1.5KE68A 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 1.5KE68A meets industry standards.
7.What is the process for return or replacement of 1.5KE68A?
All 1.5KE68A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE68A, 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 1.5KE68A part is unused and in its original packaging.
Return procedure for 1.5KE68A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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