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Taiwan Semiconductor Corporation 1.5KE68C
- Part No.:
- 1.5KE68C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE68C.pdf
- Description:
- 1500W, 68V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:3,315
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Product details
Overview
1.5KE68C from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power rails and signal lines. It features a nominal breakdown voltage of 68V, clamping voltage of 98V at 16A peak pulse current, working stand-off voltage of 55.1V, and low dynamic impedance - deployed in automotive ECU power inputs and industrial PLC I/O modules to absorb ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE68C datasheet, 1.5KE68C pinout, 1.5KE68C application, or 1.5KE68C equivalent, this page delivers verified electrical parameters, DO-201 package mechanical data, clamping performance under 10/1000μs waveform, AEC-Q101 qualification status, and real-world design guidance for ESD and inductive switching protection.
Technical Context
The 1.5KE68C operates as a unidirectional avalanche diode with fast response time (<1.0ps from 0V to VBR) and low junction capacitance (<100pF at VR = 0V). Its 1500W peak pulse power rating is defined per 10/1000μs waveform, and it maintains stable clamping up to 175°C junction temperature.
It complies with ISO 7637-2 for automotive transient immunity and meets JESD201 Class 2 whisker resistance. The device uses pure tin-plated leads solderable per J-STD-002 and is housed in UL 94V-0 rated DO-201 molding compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1mA | 61.2–74.8V - ensures reliable avalanche conduction onset within ±10% tolerance at test current |
| VWM | 55.1V - maximum continuous reverse operating voltage before leakage exceeds 1µA |
| VC @ IPP = 16A | 98V - clamped voltage during 10/1000μs surge, limiting downstream IC stress to safe levels |
| PPK | 1500W - peak surge power handling capability without failure under standardized transient waveform |
| IPP max | 16A - maximum non-repetitive peak impulse current supported at VC = 98V |
| Junction temp. range | –55°C to +175°C - enables deployment in under-hood automotive and industrial environments |
| Leakage @ VWM | <1µA - minimal standby power loss and signal integrity impact in high-impedance circuits |
Pinout & Package
Package: DO-201 axial leaded case with cathode band marking; UL 94V-0 flammability rating; 0.090g mass; pure tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to system ground or low-side return path during surge clamping |
| Cathode | Current exit point in forward bias; marked with band | Connected to protected line (e.g., 12V rail); conducts avalanche current to ground when VAK > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Clamping ratio VC/VBR | 1.53 - low ratio indicates efficient energy diversion with minimal overvoltage overshoot |
| Response time | <1.0ps - enables suppression before sensitive logic or analog circuitry experiences damage |
| ISO 7637-2 compliance | Certified for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance stabilization) |
| Halogen-free | Complies with IEC 61249-2-21 - supports RoHS-compliant and environmentally regulated manufacturing |
Applications
| Automotive Power Input Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: 12V battery line in engine control unit exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND to clamp transients above 55.1V. Use Value: Limits voltage seen by MCU power supply to ≤98V during 1500W surges, preventing latch-up or permanent damage. |
Use Scenario: 24V digital input channel on programmable logic controller subject to field-wiring ESD and relay coil kickback. IC Role / Device Role / Timing Role: Standoff protector on input terminal block, conducting only during >61.2V events. Use Value: Maintains <1µA leakage at 24V nominal, preserving input threshold accuracy while absorbing 16A pulses. |
| LED Driver Supply Rail Protection | Telecom Line Interface Protection |
Use Scenario: Constant-current LED driver powered from 48V DC bus in outdoor lighting, vulnerable to lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input capacitor node, upstream of DC-DC converter. Use Value: Clamps 10/1000μs surges to 98V, protecting MOSFET gate drivers and current-sense amplifiers rated for ≤100V. |
Use Scenario: Low-voltage telecom interface (e.g., RS-485) connected to long cables in factory automation. IC Role / Device Role / Timing Role: Bidirectional-capable variant not applicable; 1.5KE68C used in unidirectional configuration for DC-biased lines. Use Value: Provides 1500W surge margin with 55.1V standoff, enabling robust operation where common-mode transients exceed 60V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ68A | DO-214AC (SMA) package; 68V VBR min 64.6V; VC = 110V @ 13.7A; 400W rating | Lower power rating and different footprint - requires PCB layout change | Select when space-constrained designs favor surface-mount and 400W suffices |
| ON Semiconductor 1.5SMC68C | DO-214AB (SMC) package; same 68V nominal; VC = 110V @ 13.7A; 1500W rating | Same power class but larger SMC body; higher thermal mass but 2.5× footprint area vs DO-201 | Choose for enhanced thermal dissipation in high-ambient industrial settings where axial leads are acceptable |
Compared with SMAJ68A and 1.5SMC68C, the 1.5KE68C offers identical 1500W surge capability in the compact DO-201 axial package, lower clamping voltage (98V vs ≥110V), and AEC-Q101 qualification - making it optimal for cost-sensitive, high-reliability automotive and industrial through-hole designs.
Availability
1.5KE68C is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, LED driver power supplies, and telecom interface protection requiring stable component supply across extended production lifecycles.
Supply support for 1.5KE68C 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, rectifiers, and thyristors with global distribution and AEC-Q101 validation capability.
The 1.5KE series was developed specifically for high-energy transient suppression in automotive and industrial systems, emphasizing ruggedness, repeatable clamping, and compliance with ISO 7637-2 and RoHS requirements.
FAQ
What is the polarity configuration of the 1.5KE68C?
The 1.5KE68C is a unidirectional TVS diode with cathode band marking. It conducts only when anode-to-cathode voltage exceeds the breakdown threshold (61.2–74.8V), making it suitable for DC rail protection where polarity is fixed. Unlike bidirectional variants (e.g., 1.5KE68CA), it does not conduct symmetrically in reverse bias.
Does the 1.5KE68C meet AEC-Q101 requirements?
Yes, the 1.5KE68C is AEC-Q101 qualified - confirmed in Taiwan Semiconductor's official documentation (Version O2104). This includes stress testing for temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge, validating its suitability for automotive powertrain and body electronics applications.
What is the maximum clamping voltage of the 1.5KE68C under surge conditions?
The 1.5KE68C has a maximum clamping voltage (VC) of 98V at 16A peak pulse current (IPP) under the standard 10/1000μs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during transient events.
Can the 1.5KE68C be used in bidirectional applications?
No - the 1.5KE68C is strictly unidirectional. For bidirectional protection, the designated part is 1.5KE68CA (with "CA" suffix), which provides symmetrical clamping in both polarities. Using 1.5KE68C in AC or floating-bias circuits risks failure due to reverse conduction beyond its specified limits.
What is the thermal derating behavior of the 1.5KE68C above 25°C ambient?
The 1.5KE68C follows a linear derating curve: peak pulse power drops from 1500W at 25°C to zero at 175°C junction temperature. Derating is defined in Figure 2 of the datasheet; for example, at 100°C ambient with no heatsink, usable PPK reduces to ~750W. Layout must ensure adequate copper area (0.6" × 0.6") for rated performance.
1.5KE68C 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 55.1V
- Voltage - Breakdown (Min):
- 61.2V
- Voltage - Clamping (Max) @ Ipp:
- 98V
- Current - Peak Pulse (10/1000µs):
- 16A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE68C FAQ
1.How can I place an order for 1.5KE68C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE68C 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 1.5KE68C reliable?
The price and inventory of 1.5KE68C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE68C is usually 5 days.
3.What payment methods are accepted for 1.5KE68C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE68C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE68C?
1.5KE68C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE68C 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 1.5KE68C?
For technical support, including 1.5KE68C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE68C requirements.
6.How does Aetrix verify that 1.5KE68C is sourced from the original manufacturer or authorized distributors?
All 1.5KE68C 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 1.5KE68C meets industry standards.
7.What is the process for return or replacement of 1.5KE68C?
All 1.5KE68C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE68C, 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 1.5KE68C part is unused and in its original packaging.
Return procedure for 1.5KE68C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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