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onsemi 1.5KE68A
- Part No.:
- 1.5KE68A
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1.5KE68A.pdf
- Description:
- TVS DIODE 58.1VWM 92VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:2,605
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Product details
Overview
1.5KE68A from ON Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) diode designed for parallel clamping protection of sensitive electronics. It features a 58.1 V working peak reverse voltage (VRWM), 68 V breakdown voltage (VBR) at 1 mA, 92 V maximum clamping voltage (VC) at 16.3 A peak pulse current (IPP), and sub-1 ns response time. It is used in power supplies, industrial controls, and communication interfaces to protect CMOS/MOS/Bipolar ICs from ESD and surge events.
For engineers reviewing the 1.5KE68A datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM ≥ system DC bus voltage, VC margin relative to protected IC's absolute maximum rating, UL 497B recognition for isolated loop compliance, and axial leaded Surmetic package suitability for through-hole board-level surge protection.
Technical Context
The 1.5KE68A operates as a silicon avalanche diode with unidirectional polarity, triggered when reverse voltage exceeds its 68 V nominal breakdown threshold. Its low dynamic impedance ensures stable clamping under 1 ms 1500 W transients, while thermal resistance of 20 °C/W (junction-to-lead) supports reliable power dissipation during repetitive surges up to 75 °C ambient.
It complies with UL 497B for isolated loop circuit protection and meets Class 3 ESD immunity (>16 kV HBM). The device exhibits <5 µA leakage above 10 V and a temperature coefficient of 0.104 %/°C for VBR, enabling predictable performance across −65 °C to +175 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 58.1 V - Maximum continuous reverse operating voltage before clamping begins; must exceed system DC rail voltage. |
| VBR @ IT=1 mA | 64.6–71.4 V - Breakdown voltage tolerance band; defines precise turn-on threshold for overvoltage detection. |
| VC @ IPP=16.3 A | 92 V - Maximum clamped voltage during 1 ms surge; determines worst-case stress on downstream ICs. |
| PPK | 1500 W @ 1 ms - Peak transient energy handling capability; validates robustness against IEC 61000-4-5 Level 4 surges. |
| Response Time | <1 ns - Enables suppression before fast-rising transients (e.g., ESD, lightning-induced spikes) damage logic inputs. |
| Leakage Current | <5 µA @ VRWM - Negligible standby power loss and signal integrity impact in high-impedance monitoring circuits. |
| UL Recognition | UL 497B QVGQ2 - Certified for use in isolated telecom/data line protectors; satisfies safety agency requirements for field-deployed equipment. |
Pinout & Package
1.5KE68A uses the axial-leaded CASE 41A (Surmetic) plastic package with cathode indicated by a polarity band. Leads are tin-plated, solderable at 260 °C for 10 seconds at 1/16 inch from case. Mounting position is unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for unidirectional clamping | Connected to ground or low-side return path; establishes forward-biased reference for reverse-transient conduction. |
| Cathode | Protected line input terminal | Connected to the line being protected (e.g., DC input, signal trace); conducts avalanche current to anode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Supports IEC 61000-4-5 combination wave testing (e.g., 2 Ω source impedance, 1.2/50 µs voltage + 8/20 µs current waveform). |
| UL 497B certification | Validates suitability for telecom/data line isolation barriers without requiring additional external safety components. |
| ESD Class 3 (>16 kV HBM) | Meets stringent electrostatic discharge immunity for front-panel connectors and user-accessible ports. |
| Low zener impedance | Ensures minimal voltage overshoot during fast transients, preserving timing margins in digital interface lines. |
| Pb-free axial package | Complies with RoHS Directive 2011/65/EU and supports automated through-hole assembly with standard wave solder profiles. |
Applications
| Industrial Power Supply Protection | Telecom Line Interface Protection |
|---|---|
Use Scenario: 48 V DC input stage of programmable logic controller (PLC) power module exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed across input terminals to shunt surge energy to ground before it reaches upstream DC-DC converter ICs. Use Value: Limits transient voltage to ≤92 V, maintaining safe operation of 100 V-rated input MOSFETs and preventing latch-up in control ICs. | Use Scenario: RS-485 data line pair in building automation gateway connected to outdoor sensors via unshielded twisted pair. IC Role / Device Role / Timing Role: Line-side transient suppressor mounted adjacent to connector to clamp induced lightning surges before reaching isolated transceiver IC. Use Value: Sub-1 ns response prevents data corruption during 1 kV/µs fast transients; UL 497B approval enables direct use in certified Class 2 circuits. |
| Medical Equipment Input Stage | Automated Test Equipment (ATE) Signal Conditioning |
Use Scenario: AC/DC adapter input of portable ultrasound imaging unit subjected to hospital-grade power line disturbances and ESD from operator contact. IC Role / Device Role / Timing Role: Primary overvoltage protector on bulk input capacitor, coordinated with fuse and MOV for staged surge handling. Use Value: 1500 W rating absorbs single-event surges exceeding EN 61000-4-4 Level 4; low leakage avoids drift in precision analog front-end bias networks. | Use Scenario: Analog input channel of benchtop multimeter exposed to accidental 24 V DC misconnection or relay coil flyback. IC Role / Device Role / Timing Role: Front-end protection diode array component safeguarding 24-bit delta-sigma ADC input pins from overvoltage faults. Use Value: 92 V clamping voltage stays below ADC's 100 V absolute max rating; axial package allows manual replacement during field calibration. |
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 | Surface-mount SMB package; 64 V VRWM; 1000 W PPK; lower IPP (13.7 A) and higher VC (103 V). | Requires PCB redesign for SMT layout; better suited for space-constrained consumer electronics vs. industrial through-hole assemblies. | Select SMBJ64A only if board real estate is limited and 103 V clamping is acceptable for protected IC ratings. |
| 1.5KE68CA | Bi-directional variant; identical VRWM/VBR/VC specs but conducts in both polarities; same axial package and UL 497B recognition. | Required for AC-coupled or bidirectional signal lines (e.g., telephone tip/ring, CAN bus); not suitable for DC-only unidirectional rails. | Choose 1.5KE68CA only when protecting symmetric differential signals or AC-powered circuits where reverse polarity events occur. |
Compared with SMBJ64A and 1.5KE68CA, the 1.5KE68A offers optimal balance of high-power handling, through-hole reliability, and precise unidirectional clamping for DC power rails-making it preferred for industrial power supply and control system designs where mechanical robustness and regulatory compliance are critical.
Availability
1.5KE68A is available at Aetrix Electronics and suitable for industrial power supplies, telecom line interfaces, medical equipment input stages, and automated test equipment requiring stable component supply and 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
ON Semiconductor is a global semiconductor manufacturer specializing in power management, analog, sensor, and discrete devices for automotive, industrial, and cloud power applications.
The 1.5KE68A belongs to the Mosorb 1.5KE series-a family of high-reliability axial-leaded TVS diodes engineered specifically for robust board-level surge and ESD protection in harsh electrical environments.
FAQ
What is the clamping voltage of the 1.5KE68A under maximum rated surge current?
The 1.5KE68A has a maximum clamping voltage (VC) of 92 V when subjected to its rated peak pulse current (IPP) of 16.3 A with a 1 ms exponential waveform. This value is measured per Figure 5 in the official ON Semiconductor datasheet and defines the upper voltage limit imposed on protected circuitry during transient events. Designers must ensure this 92 V clamping level remains below the absolute maximum voltage rating of downstream components.
Is the 1.5KE68A RoHS compliant and lead-free?
Yes, the 1.5KE68A is offered in a Pb-free Surmetic axial package (marked with "G" suffix, e.g., 1.5KE68AG). It complies with the EU RoHS Directive 2011/65/EU and is compatible with standard wave soldering processes at 260 °C for 10 seconds. The lead finish is tin-plated, and all external surfaces are corrosion resistant per ON Semiconductor's mechanical specifications.
Does the 1.5KE68A meet UL safety standards for circuit protection?
Yes, the 1.5KE68A carries UL 497B recognition under file #E210057 for isolated loop circuit protection (category QVGQ2). This certification covers dielectric withstand, endurance conditioning, and strike voltage breakdown testing-validating its use in safety-critical telecom, industrial, and medical applications where regulatory compliance is mandatory.
How does the 1.5KE68A differ from the bi-directional 1.5KE68CA?
The 1.5KE68A is unidirectional and conducts only during reverse-polarity transients, while the 1.5KE68CA is bi-directional and clamps both positive and negative excursions. Both share identical VRWM (58.1 V), VBR (64.6–71.4 V), and VC (92 V) ratings, but the 1.5KE68CA is required for AC-coupled or differential signal lines like telephone pairs or CAN bus, whereas the 1.5KE68A is optimized for DC power rail protection.
What is the maximum steady-state power dissipation for the 1.5KE68A?
The 1.5KE68A has a steady-state power dissipation (PD) rating of 5.0 W at lead temperature (TL) ≤ 75 °C with 3/8-inch lead length. Above 75 °C, it derates linearly at 20 mW/°C. This rating applies only to continuous DC or low-frequency reverse leakage conditions-not transient suppression-and must be considered alongside thermal management in enclosed power supply designs.
1.5KE68A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-201AD, Axial
- Series:
- Mosorb™
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
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.
1.5KE68A Tags
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onsemi
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