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Vishay General Semiconductor - Diodes Division 1.5KE6.8-E3/54
- Part No.:
- 1.5KE6.8-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE6.8-E3/54.pdf
- Description:
- TVS DIODE 5.5VWM 10.8VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:5,155
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Product details
Overview
1.5KE6.8-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 6.45 V to 7.14 V breakdown voltage (VBR) at 10 mA, 5.80 V maximum working peak reverse voltage (VWM), 1000 µA maximum reverse leakage at VWM, 1500 W peak pulse power (10/1000 µs), and clamps transients to ≤10.5 V at 143 A peak pulse current - deployed in automotive power supply inputs and industrial sensor interface protection.
For engineers reviewing the 1.5KE6.8-E3/54 datasheet, 1.5KE6.8-E3/54 pinout, 1.5KE6.8-E3/54 application, or 1.5KE6.8-E3/54 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, polarity marking convention, clamping performance under standardized surge waveforms, and direct alternatives with documented voltage and power trade-offs.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds its breakdown threshold, it avalanches rapidly (<1 ns response) to divert surge current away from downstream ICs. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, critical for consistent clamping across repeated 10/1000 µs pulses at 0.01% duty cycle.
Thermal design is constrained by RθJA = 75 °C/W and RθJL = 15.4 °C/W; derating begins above TA = 25 °C per Figure 2, and maximum junction temperature is rated at +175 °C. The device supports soldering per JESD 22-B106 (275 °C, 10 s) and meets JESD 201 Class 1A whisker resistance (E3 suffix).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V at 10 mA - defines precise avalanche initiation window for reliable overvoltage detection |
| VWM | 5.80 V - maximum continuous reverse voltage before significant leakage; sets safe operating margin below VBR |
| IPPM | 143 A (10/1000 µs) - peak surge current it safely clamps without failure, enabling robust lightning/ESD protection |
| VC @ IPPM | ≤10.5 V - clamped voltage during full-rated surge, limiting stress on protected 5 V logic or microcontroller I/O |
| PPPM | 1500 W - peak pulse power handling capacity, supporting high-energy transients in automotive load-dump scenarios |
| TJ max | +175 °C - enables operation in under-hood automotive environments and industrial enclosures without thermal shutdown |
| Package | JEDEC DO-201AD (Case Style 1.5KE) - axial-leaded, epoxy-molded package with UL 94 V-0 rating and matte tin leads |
Pinout & Package
Package: JEDEC DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body with cathode band marking. Dimensions: 5.2 mm diameter × 9.5 mm length; lead diameter 1.07 mm; lead spacing 9.5 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to circuit ground or lowest potential node; completes conduction path during reverse-biased avalanche |
| Cathode | High-side transient-sensing terminal | Marked with color band; connected to protected line (e.g., 5 V rail); conducts surge current to ground when VAK > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures ±5% VBR tolerance and long-term stability under thermal cycling and humidity exposure |
| 1500 W peak pulse power (10/1000 µs) | Supports automotive load-dump immunity (ISO 7637-2 Pulse 5a) and industrial surge standards (IEC 61000-4-5) |
| Clamping voltage ≤10.5 V at 143 A | Protects 5 V CMOS logic and MCU GPIOs without exceeding absolute maximum input ratings |
| Response time <1 ns | Faster than MOVs or polymer-based protectors, preventing voltage overshoot before protection activates |
| E3 suffix RoHS compliance & JESD 201 Class 1A whisker resistance | Qualifies for high-reliability commercial and automotive applications with extended temperature and mechanical stress requirements |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V battery-fed ECU power rail exposed to ISO 7637-2 load-dump transients up to 60 V/100 ms. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VIN and GND to clamp surges before they reach DC-DC converter input. Use Value: Limits voltage to ≤10.5 V during 143 A transients, preventing damage to 36 V-rated input stages and ensuring system reset integrity. |
Use Scenario: 4–20 mA current-loop sensor interface in factory automation subject to inductive switching noise. IC Role / Device Role / Timing Role: TVS mounted across sensor output terminals to suppress coupled transients before analog front-end op-amp inputs. Use Value: Clamps fast-rising spikes (<1 ns) without adding capacitance that would distort 1 kHz bandwidth signals. |
| Consumer USB Port ESD Protection | Telecom DSL Line Surge Protection |
Use Scenario: 5 V USB VBUS line in set-top box vulnerable to human-body-model (HBM) ESD events. IC Role / Device Role / Timing Role: Primary shunt protector on VBUS, coordinated with secondary polymer PTC for overcurrent limiting. Use Value: Absorbs 15 kV contact discharge per IEC 61000-4-2 with sub-10.5 V clamping, preserving USB PHY functionality. |
Use Scenario: DSL line interface card exposed to induced lightning surges per ITU-T K.20/K.21. IC Role / Device Role / Timing Role: First-stage protector on tip/ring lines, upstream of gas discharge tube (GDT) and secondary TVS array. Use Value: Fast response captures initial surge edge; 1500 W rating handles multi-kA impulses without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8A | DO-214AA package; lower PPPM = 600 W; VC = 11.2 V @ 53.3 A; smaller footprint but reduced surge capacity | Better suited for space-constrained PCBs with moderate surge requirements (e.g., consumer IoT) | Select SMBJ6.8A only if board layout prohibits axial DO-201AD placement and surge energy remains below 600 W |
| 1.5KE6.8AHE3_B | Same DO-201AD package and electrical specs; AEC-Q101 qualified; HE3 suffix indicates JESD 201 Class 2 whisker resistance | Required for automotive modules requiring component-level reliability certification (e.g., ADAS camera power rails) | Choose 1.5KE6.8AHE3_B when automotive qualification or enhanced whisker resistance is mandatory; otherwise 1.5KE6.8-E3/54 suffices for commercial use |
Compared with SMBJ6.8A, 1.5KE6.8-E3/54 delivers 2.5× higher surge power handling in a through-hole package ideal for high-reliability power rails; versus 1.5KE6.8AHE3_B, it trades AEC-Q101 qualification for cost-effective commercial-grade performance with identical clamping behavior and thermal limits.
Availability
1.5KE6.8-E3/54 is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor interface hardening, consumer USB port ESD mitigation, and telecom DSL line surge suppression requiring stable component supply across production lifecycles.
Supply support for 1.5KE6.8-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where 1500 W surge capability and stable clamping under thermal stress are essential.
FAQ
What is the breakdown voltage range of the 1.5KE6.8-E3/54?
The 1.5KE6.8-E3/54 has a guaranteed breakdown voltage (VBR) range of 6.45 V to 7.14 V at a test current of 10 mA, measured per JEDEC standard. This tight ±5% tolerance ensures predictable avalanche onset across temperature and unit-to-unit variation, critical for protecting 5 V systems where overvoltage margins are narrow. The 1.5KE6.8-E3/54 maintains this specification across its full operating junction temperature range of –55 °C to +175 °C.
How does the 1.5KE6.8-E3/54 differ from bidirectional variants like 1.5KE6.8CA?
The 1.5KE6.8-E3/54 is unidirectional, meaning it conducts only when cathode voltage exceeds anode voltage by ≥VBR; it must be installed with correct polarity (cathode band toward protected line). In contrast, 1.5KE6.8CA is bidirectional and symmetrical - no polarity marking required - making it suitable for AC-coupled or differential signal lines. The 1.5KE6.8-E3/54 offers lower leakage and tighter VBR control for DC rail protection, while 1.5KE6.8CA sacrifices some precision for dual-direction clamping.
What is the maximum clamping voltage of the 1.5KE6.8-E3/54 under surge conditions?
The 1.5KE6.8-E3/54 clamps to a maximum of 10.5 V when subjected to its rated peak pulse current of 143 A (10/1000 µs waveform). This value is measured at the device terminals and represents worst-case voltage seen by downstream circuitry during full-rated surge events. Because the 1.5KE6.8-E3/54 achieves this clamping level with minimal overshoot and sub-nanosecond response, it reliably holds protected 5 V logic within safe operating limits.
Can the 1.5KE6.8-E3/54 be used in automotive applications?
The 1.5KE6.8-E3/54 is rated for junction temperatures up to +175 °C and qualified to JESD 201 Class 1A for whisker resistance, making it suitable for under-dash and engine-compartment-adjacent automotive applications. However, for modules requiring AEC-Q101 certification, Vishay specifies the 1.5KE6.8AHE3_B variant - identical electrically but with formal qualification. The 1.5KE6.8-E3/54 itself is commercial-grade and widely deployed in non-safety-critical automotive subsystems such as infotainment power supplies.
What packaging format is supplied for the 1.5KE6.8-E3/54?
The 1.5KE6.8-E3/54 is supplied in 13-inch paper tape and reel packaging, with a base quantity of 1400 units per reel and a unit weight of 0.968 g. The "/54" suffix in the part number explicitly denotes this packaging configuration per Vishay's ordering nomenclature. Lead finish is matte tin, compliant with J-STD-002 and JESD 22-B102 for reliable solderability in both wave and reflow processes.
1.5KE6.8-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):
- 5.5V
- Voltage - Breakdown (Min):
- 6.12V
- Voltage - Clamping (Max) @ Ipp:
- 10.8V
- Current - Peak Pulse (10/1000µs):
- 139A
- 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
1.5KE6.8-E3/54 FAQ
1.How can I place an order for 1.5KE6.8-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE6.8-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 1.5KE6.8-E3/54 reliable?
The price and inventory of 1.5KE6.8-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 1.5KE6.8-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE6.8-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE6.8-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE6.8-E3/54?
1.5KE6.8-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE6.8-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 1.5KE6.8-E3/54?
For technical support, including 1.5KE6.8-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE6.8-E3/54 requirements.
6.How does Aetrix verify that 1.5KE6.8-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE6.8-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 1.5KE6.8-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE6.8-E3/54?
All 1.5KE6.8-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE6.8-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 1.5KE6.8-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE6.8-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE6.8-E3/54 Tags
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