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Vishay General Semiconductor - Diodes Division 1.5KE68-E3/73
- Part No.:
- 1.5KE68-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE68-E3/73.pdf
- Description:
- TVS DIODE 55.1VWM 98VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:3,172
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Product details
Overview
1.5KE68-E3/73 from Vishay General Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) diode with a nominal breakdown voltage of 64.6 V to 71.4 V at 1 mA test current, clamping voltage of 92.0 V at 16.3 A peak pulse current, and stand-off voltage of 58.1 V. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning-induced surges in industrial power supplies and automotive ECUs.
For engineers reviewing the 1.5KE68-E3/73 datasheet, 1.5KE68-E3/73 pinout, 1.5KE68-E3/73 application, or 1.5KE68-E3/73 equivalent, key selection criteria include unidirectional polarity, 10/1000 µs waveform clamping performance, JEDEC-standard 1.5KE package mechanical compatibility, and RoHS-compliant matte tin-plated leads meeting J-STD-002 solderability.
Technical Context
This device operates as a silicon avalanche diode optimized for fast-clamp transient suppression. Its glass-passivated junction enables sub-nanosecond response time and low incremental surge resistance, while its 1500 W peak pulse power rating is specified under standardized 10/1000 µs waveform conditions with 0.01 % duty cycle.
The 1.5KE68-E3/73 exhibits a maximum clamping voltage of 92.0 V at 16.3 A IPPM, a temperature coefficient of breakdown voltage of +0.104 %/°C, and operates across -55 °C to +175 °C junction temperature range - supporting high-reliability deployment in under-hood automotive and industrial control environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 64.6 V min / 71.4 V max at 1 mA - defines minimum voltage at which avalanche conduction begins reliably |
| Stand-off Voltage VWM | 58.1 V - maximum continuous reverse working voltage before leakage exceeds 1 µA |
| Clamping Voltage VC | 92.0 V at 16.3 A IPPM - peak voltage seen by protected circuit during 10/1000 µs surge |
| Peak Pulse Power PPPM | 1500 W - surge energy handling capacity per single 10/1000 µs event |
| Maximum Leakage ID | 1.0 µA at VWM - ensures minimal loading on sensitive signal or bias networks |
| Junction Temperature Range | -55 °C to +175 °C - supports operation in engine compartments and industrial enclosures without derating |
| Thermal Resistance RθJL | 15.4 °C/W - enables effective heat transfer from junction to lead under pulsed conditions |
Pinout & Package
Package: JEDEC-standard 1.5KE molded epoxy case (Case Style 1.5KE), axial-leaded, RoHS-compliant, matte tin-plated leads. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to lower-potential side of protected line; enables unidirectional clamping to ground |
| Cathode | Current exit terminal in forward bias; avalanche conduction terminal in reverse bias | Marked with color band; connected to higher-potential side (e.g., VIN, signal line); conducts surge current to ground path |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Ensures stable avalanche characteristics and long-term reliability under repeated surge stress |
| 1500 W peak pulse power (10/1000 µs) | Provides robust protection against high-energy transients common in motor drives and power supply inputs |
| Sub-nanosecond response time | Clamps voltage spikes before sensitive downstream components experience overvoltage damage |
| Low incremental surge resistance | Minimizes voltage overshoot during high-current transients, improving clamping precision |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance and J-STD-002 solderability standards |
Applications
| Industrial Motor Drive Protection | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Suppresses inductive kickback from solenoid valves and relay coils in PLC output modules. IC Role / Device Role: Unidirectional TVS placed between switched 24 V DC load and ground. Use Value: Limits transient voltage to ≤92.0 V, preventing latch-up or gate oxide rupture in driver ICs and microcontrollers. | Use Scenario: Protects CAN transceiver and MCU I/O pins from load dump and jump-start surges. IC Role / Device Role: Primary clamping device on 12 V power rail upstream of LDO regulators. Use Value: Withstands 1500 W pulses without degradation, maintaining system uptime during vehicle battery faults. |
| Telecom Power Supply Input | Consumer Appliance Mainboard |
Use Scenario: Shields AC-DC converter primary-side rectifier and controller from lightning-induced surges on mains input. IC Role / Device Role: First-stage overvoltage clamp on bridge rectifier output. Use Value: Clamps 10/1000 µs surges to 92.0 V while dissipating full 1500 W energy, reducing need for secondary crowbar circuits. | Use Scenario: Safeguards microcontroller reset line and sensor interface from ESD and relay noise in washing machine control boards. IC Role / Device Role: Signal-line TVS on 3.3 V or 5 V logic rails with series impedance. Use Value: 1.0 µA leakage at 58.1 V ensures no impact on brown-out detection thresholds or ADC reference stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ64A | Same 64 V VWM, but 400 W PPPM; SMA package (surface-mount) | Lower power handling; suited for board-level signal protection, not primary power rail clamping | Select when space-constrained PCB layout requires SMD and surge energy is ≤400 W |
| ON Semiconductor 1.5SMC68A | Identical 1.5KE mechanical outline and 64–71.4 V VBR, but rated for 1500 W with tighter VC tolerance (92.0 V vs. 93.6 V) | Drop-in replacement in through-hole designs requiring same thermal mass and lead-forming compatibility | Choose for second-source assurance where 1.5KE footprint and lead pitch must be preserved |
Compared with 1.5KE68-E3/73, SMAJ64A offers surface-mount convenience at reduced surge capacity, while 1.5SMC68A delivers identical form-factor compatibility with marginally tighter clamping control - making it the preferred functional alternative for legacy 1.5KE-requiring designs.
Availability
1.5KE68-E3/73 is available at Aetrix Electronics and suitable for industrial motor drives, automotive ECUs, telecom power supplies, and consumer appliance mainboards requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE68-E3/73 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 and ruggedized performance.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure applications where failure resilience is critical.
FAQ
What is the clamping voltage of the 1.5KE68-E3/73 under standard test conditions?
The 1.5KE68-E3/73 has a maximum clamping voltage (VC) of 92.0 V when subjected to a 10/1000 µs waveform at 16.3 A peak pulse current (IPPM). This value is measured per JEDEC standard test conditions and represents the highest voltage the protected circuit will experience during a defined surge event. The 1.5KE68-E3/73 maintains this clamping performance across its full operating temperature range.
Is the 1.5KE68-E3/73 unidirectional or bidirectional?
1.5KE68-E3/73 is a unidirectional transient voltage suppressor. Its polarity is marked by a cathode band, and it conducts avalanche current only when reverse-biased above its breakdown voltage. Unlike bidirectional variants (e.g., 1.5KE68CA), the 1.5KE68-E3/73 does not conduct in both directions and must be oriented correctly in-circuit to protect against negative-going transients relative to ground.
Does the 1.5KE68-E3/73 meet AEC-Q101 qualification?
No, the 1.5KE68-E3/73 is not AEC-Q101 qualified. Per Vishay documentation, AEC-Q101 qualification applies only to parts with HE3 suffix (e.g., 1.5KE68AHE3_B). The 1.5KE68-E3/73 carries the commercial-grade E3 suffix and is rated for industrial and general-purpose use, with full specification compliance across -55 °C to +175 °C but without automotive qualification testing.
What is the maximum leakage current of the 1.5KE68-E3/73 at its stand-off voltage?
The 1.5KE68-E3/73 exhibits a maximum reverse leakage current (ID) of 1.0 µA when biased at its rated stand-off voltage (VWM) of 58.1 V, measured at 25 °C ambient. This low leakage ensures minimal power loss and avoids interference with high-impedance sensing or bias networks - a key design advantage for precision analog and low-power microcontroller applications using the 1.5KE68-E3/73.
Can the 1.5KE68-E3/73 be used in parallel to increase surge handling capacity?
Yes, the 1.5KE68-E3/73 can be used in parallel to increase total peak pulse power capability, but only with careful attention to matching and current-sharing. Vishay's application notes confirm parallel use is viable when devices are from the same lot, mounted symmetrically, and thermally coupled - however, mismatched VBR or thermal gradients may cause uneven current distribution. For most designs, selecting a higher-rated part (e.g., 1.5KE75-E3/73) is preferred over paralleling 1.5KE68-E3/73 units.
1.5KE68-E3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 55.1V
- Voltage - Breakdown (Min):
- 61.2V
- Voltage - Clamping (Max) @ Ipp:
- 98V
- Current - Peak Pulse (10/1000µs):
- 15.3A
- 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
1.5KE68-E3/73 FAQ
1.How can I place an order for 1.5KE68-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE68-E3/73 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 1.5KE68-E3/73 reliable?
The price and inventory of 1.5KE68-E3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE68-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE68-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE68-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE68-E3/73?
1.5KE68-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE68-E3/73 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 1.5KE68-E3/73?
For technical support, including 1.5KE68-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE68-E3/73 requirements.
6.How does Aetrix verify that 1.5KE68-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE68-E3/73 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 1.5KE68-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE68-E3/73?
All 1.5KE68-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE68-E3/73, 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 1.5KE68-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE68-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE68-E3/73 Tags
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