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Vishay General Semiconductor - Diodes Division 1.5KE68A-E3/54
- Part No.:
- 1.5KE68A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE68A-E3/54.pdf
- Description:
- TVS DIODE 58.1VWM 92VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,304
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Product details
Overview
1.5KE68A-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 64.6 V minimum breakdown voltage (VBR), 58.1 V maximum standoff voltage (VWM), 92.0 V clamping voltage (VC) at 16.3 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs), and operates across -55 °C to +175 °C junction temperature range - used in automotive power supply input stages and industrial sensor interface protection.
For engineers reviewing the 1.5KE68A-E3/54 datasheet, 1.5KE68A-E3/54 pinout, 1.5KE68A-E3/54 application, or 1.5KE68A-E3/54 equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, RoHS-compliant packaging details, and direct alternatives with documented parameter differences for ESD and lightning transient suppression design.
Technical Context
The 1.5KE68A-E3/54 implements a glass-passivated silicon PN junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its unidirectional polarity uses a cathode band marking and exhibits 3.5 V forward voltage at 100 A, enabling robust surge handling without latch-up in series-connected protection schemes.
Rated for 1500 W peak pulse power per 10/1000 µs waveform at 0.01% duty cycle, it delivers stable clamping up to 175 °C junction temperature with thermal resistance of 15.4 °C/W (junction-to-lead) and 75 °C/W (junction-to-ambient), supporting high-reliability placement on PCBs with limited heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V at 1.0 mA test current - defines precise voltage threshold where avalanche conduction begins, critical for coordination with downstream IC overvoltage limits |
| VWM | 58.1 V maximum - ensures no leakage conduction during normal 48 V nominal rail operation, preserving system efficiency |
| VC @ IPPM | 92.0 V at 16.3 A - determines maximum voltage imposed on protected circuit during 10/1000 µs surge, directly bounding stress on downstream MOSFETs or regulators |
| PPPM | 1500 W - supports single-event lightning-induced transients per IEC 61000-4-5 Level 4 (4 kV) when properly routed and decoupled |
| IFSM | 200 A (8.3 ms half-sine) - enables survival of repetitive motor-switching surges in industrial PLC I/O modules |
| TJ range | -55 °C to +175 °C - qualified for under-hood automotive environments and high-temperature industrial enclosures without derating |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with matte tin-plated leads, UL 94 V-0 molded epoxy body, compatible with wave soldering (275 °C, 10 s) |
Pinout & Package
1.5KE68A-E3/54 uses the standard DO-201AD (Case Style 1.5KE) axial-leaded package: cylindrical epoxy body with cathode band marking on one end; leads are 0.375" (9.5 mm) long, 0.042" (1.07 mm) diameter, matte tin-plated per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or return path; establishes reference for clamping action during positive transients on cathode side |
| Cathode (banded end) | High-side transient capture node | Placed on protected line (e.g., 48 V rail); conducts avalanche current to anode during overvoltage events exceeding VWM |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance (±5%) and long-term reliability under thermal cycling, eliminating passivation-related drift in automotive applications |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 surge immunity up to 4 kV open-circuit voltage in 2 Ω/12 Ω source impedance configurations |
| 92.0 V clamping voltage at 16.3 A | Limits voltage excursion on protected 48 V systems to <92 V, staying below 100 V absolute maximum ratings of common DC-DC controllers |
| 175 °C max junction temperature | Permits operation in engine control units and industrial drives without external heatsinking or airflow dependency |
| RoHS-compliant, JESD 201 Class 1A whisker tested | Meets automotive electronics manufacturing requirements for lead-free assembly and long-term interconnect integrity |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: 48 V battery rail in ADAS domain controller exposed to load dump and jump-start transients. IC Role / Device Role / Timing Role: Primary shunt TVS placed upstream of DC-DC converter input to clamp transients before they reach regulation stage. Use Value: Clamps 120 V load dump spikes to ≤92 V within <1 ns, preventing damage to 100 V-rated input MOSFETs and maintaining system uptime. |
Use Scenario: Analog output line (4–20 mA) from pressure sensor in factory automation cabinet subject to ESD and cable coupling noise. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS mounted at connector entry point to divert fast transients before reaching op-amp input stage. Use Value: Limits induced voltage to <92 V while adding only 1.5 pF junction capacitance (per Fig. 4), preserving signal bandwidth up to 10 MHz. |
| Telecom DC Feeder Protection | Motor Drive DC Bus Snubber |
Use Scenario: -48 V telecom rectifier output feeding remote radio units over long copper runs susceptible to lightning induction. IC Role / Device Role / Timing Role: First-line overvoltage suppressor on feeder line, coordinated with secondary MOV and fuse. Use Value: Absorbs 1500 W surge energy without degradation, maintaining VWM = 58.1 V to avoid false triggering during normal -48 V ±10% operation. |
Use Scenario: 60 V DC bus in BLDC motor drive experiencing commutation spikes from IGBT switching. IC Role / Device Role / Timing Role: Unidirectional TVS across bus rails to clamp inductive kickback and reduce EMI generation. Use Value: Responds in <1 ns to limit spike amplitude to 92 V, reducing dv/dt stress on bus capacitors and extending electrolytic lifetime by >30%. |
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 PPPM (600 W), smaller SMB package (lower IPPM = 9.9 A), VC = 103 V at 5.8 A | Not suitable for IEC 61000-4-5 Level 4; limited to board-level ESD and lower-energy transients | Select when space-constrained layouts require SMT mounting and surge energy is ≤600 W |
| 1.5KE68CA | Bidirectional variant; identical VBR, VWM, VC, and PPPM, but symmetric clamping for AC-coupled or floating lines | Required for RS-485 data lines or transformer-coupled interfaces where polarity reversal occurs | Choose only when protecting bidirectional signals or AC rails - not a drop-in replacement for unidirectional use |
Compared with 1.5KE68A-E3/54, SMBJ64A trades peak power and ruggedness for compact SMT fit, while 1.5KE68CA retains full 1500 W capability but adds bidirectional symmetry - neither offers pin compatibility, and both require layout review for thermal and routing implications.
Availability
1.5KE68A-E3/54 is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor interface clamping, telecom DC feeder surge suppression, and motor drive DC bus snubbing requiring stable component supply across extended temperature ranges and high-reliability production programs.
Supply support for 1.5KE68A-E3/54 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, and protection devices with emphasis on high-power, high-reliability, and automotive-qualified components.
The 1.5KE series was engineered specifically for industrial and automotive transient suppression, delivering consistent 1500 W surge handling in axial-leaded packages optimized for manual and wave-solder assembly in harsh-environment electronics.
FAQ
What is the breakdown voltage tolerance for 1.5KE68A-E3/54?
The 1.5KE68A-E3/54 has a specified breakdown voltage range of 64.6 V (minimum) to 71.4 V (maximum) at 1.0 mA test current, representing a ±5% tolerance around the nominal 68 V rating. This tight VBR window ensures predictable clamping onset in 48 V and 60 V systems, and is verified per JEDEC standard test conditions in the Vishay 88301 datasheet.
Is 1.5KE68A-E3/54 RoHS compliant and lead-free?
Yes, 1.5KE68A-E3/54 is RoHS compliant and lead-free, indicated by the "E3" suffix per Vishay's ordering nomenclature. The device uses matte tin-plated leads, meets JESD 201 Class 1A whisker testing, and conforms to EU Directive 2011/65/EU. Full compliance documentation is available in Vishay's material declaration report for base P/N 1.5KE68A.
Can 1.5KE68A-E3/54 be used in bidirectional signal protection?
No, 1.5KE68A-E3/54 is strictly unidirectional and must be installed with cathode toward the protected line. For bidirectional protection (e.g., RS-485, AC lines), the functionally matched 1.5KE68CA variant must be used. Using 1.5KE68A-E3/54 on bidirectional paths risks catastrophic failure during reverse-polarity transients due to lack of reverse avalanche capability.
What is the maximum clamping voltage of 1.5KE68A-E3/54 under surge conditions?
The maximum clamping voltage (VC) of 1.5KE68A-E3/54 is 92.0 V at 16.3 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per JEDEC test method and defines the upper voltage bound imposed on protected circuitry during worst-case surge events - critical for validating margin against downstream component absolute maximum ratings.
Does 1.5KE68A-E3/54 meet AEC-Q101 qualification?
No, 1.5KE68A-E3/54 is commercial-grade only and does not carry AEC-Q101 qualification. Vishay offers AEC-Q101 qualified versions under the "HE3" suffix (e.g., 1.5KE68AHE3_B), which include additional stress testing for automotive use. The "E3" suffix denotes RoHS compliance and commercial temperature grading (-55 °C to +175 °C), but not automotive qualification.
1.5KE68A-E3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- 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):
- 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
1.5KE68A-E3/54 FAQ
1.How can I place an order for 1.5KE68A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE68A-E3/54 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-E3/54 reliable?
The price and inventory of 1.5KE68A-E3/54 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-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE68A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE68A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE68A-E3/54?
1.5KE68A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE68A-E3/54 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-E3/54?
For technical support, including 1.5KE68A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE68A-E3/54 requirements.
6.How does Aetrix verify that 1.5KE68A-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE68A-E3/54 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-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE68A-E3/54?
All 1.5KE68A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE68A-E3/54, 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-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE68A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE68A-E3/54 Tags
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