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Vishay General Semiconductor - Diodes Division 1.5KE68-E3/54
- Part No.:
- 1.5KE68-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE68-E3/54.pdf
- Description:
- TVS DIODE 55.1VWM 98VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:7,288
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Product details
Overview
1.5KE68-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 working peak reverse 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. It is used in automotive power supply inputs and industrial sensor interface protection.
For engineers reviewing the 1.5KE68-E3/54 datasheet, 1.5KE68-E3/54 pinout, 1.5KE68-E3/54 application, or 1.5KE68-E3/54 equivalent, this page delivers verified electrical parameters, JEDEC-standardized package dimensions, clamping performance under surge conditions, thermal resistance data (RθJA = 75 °C/W), and RoHS-compliant commercial-grade sourcing details - all specific to the 1.5KE68-E3/54 variant.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time (<1 ns) and low incremental surge resistance. Its clamping behavior is defined by a 10/1000 µs waveform test condition, with VC = 92.0 V at IPPM = 16.3 A and VF = 3.5 V at 100 A forward surge.
The device complies with JEDEC standard 1.5KE case style, features matte tin-plated leads solderable per J-STD-002, and meets UL 94 V-0 flammability rating. The E3 suffix confirms RoHS compliance and JESD 201 Class 1A whisker resistance, while the /54 packaging code denotes 13" paper tape and reel (1400 pcs).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V at 1.0 mA test current - defines reliable conduction onset under transient stress |
| VWM | 58.1 V maximum - ensures no leakage during normal 48 V–56 V DC system operation |
| VC @ IPPM | 92.0 V at 16.3 A - limits downstream IC voltage exposure during 1500 W surge events |
| PPPM | 1500 W (10/1000 µs) - sustains high-energy transients common in automotive load-dump and inductive switching |
| IFSM | 200 A (8.3 ms half-sine) - withstands repetitive motor-driver turn-off surges without degradation |
| TJ range | –55 °C to +175 °C - supports under-hood automotive and industrial ambient environments |
| RθJA | 75 °C/W - enables thermal design with minimal heatsinking on PCBs with standard copper area |
Pinout & Package
1.5KE68-E3/54 uses the industry-standard DO-201AD (Case Style 1.5KE) axial-leaded package: 1.0" (25.4 mm) body length, 0.210" (5.3 mm) max diameter, 0.375" (9.5 mm) lead length, matte tin-plated leads. Polarity is marked by a cathode band at one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return plane; completes clamping loop during positive transients |
| Cathode | Protected line connection / Surge sink | Connected to the line being protected (e.g., 48 V rail); conducts surge current into anode when VAK exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance (±5 %) and long-term reliability under thermal cycling |
| 1500 W peak pulse power | Handles ISO 7637-2 Pulse 5a (load dump) up to 120 V/100 ms without failure |
| Sub-nanosecond response time | Clamps before sensitive logic or analog circuitry experiences overvoltage damage |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance and global environmental compliance requirements |
| UL 94 V-0 molding compound | Prevents flame propagation in enclosed industrial enclosures and automotive junction boxes |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs against load-dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Primary shunt clamp placed between power rail and chassis ground, conducting only during overvoltage events. Use Value: Limits rail voltage to ≤92.0 V during 1500 W surges, preventing MOSFET gate oxide rupture and MCU brownout. |
Use Scenario: Shielding 0–10 V analog sensor outputs (e.g., pressure, temperature) from ESD and inductive coupling in factory automation. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-ground, cathode-to-signal line, clamping negative transients and blocking reverse leakage. Use Value: Maintains signal integrity with <1 µA leakage at 58.1 V, enabling accurate 12-bit ADC readings without offset drift. |
| Telecom DC Power Feeds | Consumer Device USB Power Input |
Use Scenario: Safeguarding PoE-powered network switches and base stations fed via 57 V DC telecom supplies. IC Role / Device Role / Timing Role: Standoff-rated TVS on input bulk capacitor node, absorbing lightning-induced surges coupled through long outdoor cabling. Use Value: Withstands 10/1000 µs surges up to 16.3 A while holding VC ≤92.0 V, preserving upstream DC/DC controller operation. |
Use Scenario: Hardening USB-C PD input stages (5–20 V) in portable medical monitors and smart home hubs against user-handling ESD. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp on VBUS line, grounded anode, cathode tied to input filter capacitor. Use Value: Delivers 1500 W surge handling without compromising USB 2.0 signal integrity due to absence of parasitic capacitance impact on data lines. |
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 | DO-214AA package (SMB), 64 V VWM, 1000 W PPPM, RθJA = 50 °C/W | Lower power rating; better thermal performance in surface-mount layouts | Select SMBJ64A when board space is constrained and peak surge energy is ≤1000 W |
| 1.5KE68AHE3_B | AEC-Q101 qualified, identical electrical specs, same DO-201AD package, HE3 suffix indicates automotive qualification | Required for automotive OEM production; supports extended temperature validation and PPAP documentation | Choose 1.5KE68AHE3_B for Tier-1 automotive programs where AEC-Q101 compliance is mandatory |
Compared with 1.5KE68-E3/54, SMBJ64A offers smaller footprint but reduced surge capacity, while 1.5KE68AHE3_B provides identical protection performance with certified automotive reliability - making the latter essential for vehicle systems, and the former suitable for cost-sensitive industrial designs where 1000 W suffices.
Availability
1.5KE68-E3/54 is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor interface hardening, telecom DC feed safeguarding, and consumer USB-C PD input conditioning requiring stable component supply and full traceability.
Supply support for 1.5KE68-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 reliability, power handling, and automotive-grade qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where robustness against load dump, lightning, and ESD is non-negotiable.
FAQ
What is the clamping voltage of the 1.5KE68-E3/54 under maximum surge conditions?
The 1.5KE68-E3/54 exhibits a maximum clamping voltage (VC) of 92.0 V when subjected to its rated peak pulse current of 16.3 A using the standardized 10/1000 µs waveform. This value is measured per JEDEC test conditions and guarantees that downstream components see no more than 92.0 V during worst-case transient events, directly supporting design margin calculations for 48 V and 60 V systems. The 1.5KE68-E3/54 maintains this clamping performance across its full operating temperature range.
Is the 1.5KE68-E3/54 RoHS compliant and lead-free?
Yes, the 1.5KE68-E3/54 carries the E3 suffix, which certifies full RoHS compliance per Directive 2011/65/EU and JESD 201 Class 1A whisker resistance. Its matte tin-plated leads meet J-STD-002 solderability requirements, and the epoxy molding compound satisfies UL 94 V-0 flammability standards. No lead, cadmium, mercury, hexavalent chromium, PBB, or PBDE substances exceed threshold limits. The 1.5KE68-E3/54 is suitable for commercial and industrial applications requiring environmentally compliant components.
Can the 1.5KE68-E3/54 be used in bidirectional configurations?
No, the 1.5KE68-E3/54 is a unidirectional TVS diode, identifiable by its cathode band marking and specified electrical parameters (VBR, VWM, VC) for single-polarity operation. Bidirectional variants in the same family use the "CA" suffix (e.g., 1.5KE68CA). Using the 1.5KE68-E3/54 in bidirectional circuits would leave negative-going transients unprotected. For symmetrical surge suppression, select 1.5KE68CA or verify polarity alignment in the 1.5KE68-E3/54 application layout.
What is the thermal resistance and maximum junction temperature of the 1.5KE68-E3/54?
The 1.5KE68-E3/54 has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and a maximum junction temperature (TJ) of +175 °C. These values are measured under standard JEDEC conditions with 0.375" (9.5 mm) lead length. In practice, this allows the 1.5KE68-E3/54 to operate reliably in under-hood automotive environments and industrial control cabinets without forced cooling, provided PCB copper area and airflow meet minimum layout guidelines outlined in Vishay's application notes for DO-201AD packages.
How does the 1.5KE68-E3/54 compare to the 1.5KE68AHE3_B variant?
The 1.5KE68-E3/54 and 1.5KE68AHE3_B share identical electrical specifications, package (DO-201AD), and RoHS compliance, but differ in qualification: the HE3_B suffix indicates AEC-Q101 qualification for automotive applications, including extended temperature validation, failure analysis protocols, and PPAP support. The 1.5KE68-E3/54 is commercial-grade only. Therefore, 1.5KE68AHE3_B is required for automotive production, while the 1.5KE68-E3/54 serves industrial and telecom applications where AEC-Q101 is not mandated.
1.5KE68-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:
- 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-E3/54 FAQ
1.How can I place an order for 1.5KE68-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE68-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 1.5KE68-E3/54 reliable?
The price and inventory of 1.5KE68-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 1.5KE68-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE68-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE68-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE68-E3/54?
1.5KE68-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE68-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 1.5KE68-E3/54?
For technical support, including 1.5KE68-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE68-E3/54 requirements.
6.How does Aetrix verify that 1.5KE68-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE68-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 1.5KE68-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE68-E3/54?
All 1.5KE68-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE68-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 1.5KE68-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE68-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE68-E3/54 Tags
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