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Vishay General Semiconductor - Diodes Division 1.5KE8.2A-E3/51
- Part No.:
- 1.5KE8.2A-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE8.2A-E3/51.pdf
- Description:
- TVS DIODE 7.02VWM 12.1VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:7,080
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Product details
Overview
1.5KE8.2A-E3/51 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for primary-side overvoltage protection in DC power rails and signal lines. It features a 7.79 V to 8.61 V breakdown voltage (VBR) at 10 mA, 7.02 V maximum stand-off voltage (VWM), 12.1 V clamping voltage (VC) at 124 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, microcontrollers, and sensor interfaces against ESD and inductive switching transients.
For engineers reviewing the 1.5KE8.2A-E3/51 datasheet, 1.5KE8.2A-E3/51 pinout, 1.5KE8.2A-E3/51 application, or 1.5KE8.2A-E3/51 equivalent, this device is selected for robust, low-leakage (<200 µA at VWM) clamping in automotive body electronics, industrial I/O modules, and telecom power supplies where fast response (<1 ns), high surge tolerance, and RoHS-compliant through-hole packaging are required.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches into low-impedance conduction to divert surge current away from downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance.
It is rated for 1000 µA maximum reverse leakage at VWM = 7.02 V, supports 200 A non-repetitive forward surge current (8.3 ms half-sine), and maintains thermal stability up to TJ = 175 °C with RθJA = 75 °C/W - enabling reliable operation without active cooling in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 7.79 V / 8.61 V at 10 mA - defines precise avalanche initiation threshold for repeatable clamping behavior |
| VWM | 7.02 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | 12.1 V at 124 A - clamping voltage during 1500 W transient, limiting stress on protected ICs |
| IPPM | 124 A - peak pulse current capability under 10/1000 µs waveform, supporting high-energy surge immunity |
| PPPM | 1500 W - standardized surge power handling per IEC 61000-4-5 Level 4 compliance margin |
| ID @ VWM | 200 µA - ultra-low reverse leakage preserves efficiency in battery-powered or high-impedance circuits |
| TJ max. | 175 °C - extended junction temperature range enables use in under-hood automotive or industrial enclosures |
Pinout & Package
Package: Axial lead DO-201AD (Case Style 1.5KE), epoxy-molded, RoHS-compliant, matte tin-plated leads. Dimensions: 5.3 mm diameter × 9.5 mm length (0.210" × 0.375"), lead spacing 7.2 mm (0.285").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during positive surges in bidirectional configurations (not applicable here) |
| Cathode | Reverse-biased clamping terminal | Marked by color band; connected to higher-potential rail (e.g., VCC) to clamp negative transients to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance (±5%) and long-term reliability under thermal cycling |
| 1500 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive applications |
| Clamping ratio VC/VBR ≈ 1.47 | Low ratio indicates efficient energy diversion with minimal voltage overshoot during transients |
| Response time < 1 ns | Faster than MOVs or GDTs - protects sensitive CMOS inputs before damage occurs |
| AEC-Q101 qualification option (HE3 suffix) | Available variant meets automotive-grade stress testing for engine control and ADAS subsystems |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 12 V supply rail and LIN bus interface from load dump and inductive kickback in door module ECUs. IC Role / Device Role / Timing Role: Unidirectional shunt clamping device placed between VBAT and chassis ground, responding within sub-nanosecond to suppress >100 V transients. Use Value: Prevents latch-up or gate oxide rupture in local MCU and transceiver ICs while maintaining <200 µA standby leakage. |
Use Scenario: Safeguarding 24 V digital input channels from field-wiring induced surges in factory automation controllers. IC Role / Device Role / Timing Role: Primary-level transient suppressor mounted at connector entry point, clamping fast-rising spikes before reaching optocoupler or Schmitt trigger inputs. Use Value: Enables EN 61000-4-4/5 compliance with single-device solution; eliminates need for series impedance or secondary filtering. |
| Telecom Power Supply Input Stage | Consumer Appliance Motor Drive Board |
Use Scenario: Shielding AC/DC front-end rectifier and PFC controller from lightning-induced surges on mains-connected telecom equipment. IC Role / Device Role / Timing Role: First-line overvoltage clamp across bulk capacitor, triggered before MOV activation to reduce stress on downstream components. Use Value: Extends system MTBF by absorbing repetitive low-energy transients that degrade MOVs over time. |
Use Scenario: Protecting H-bridge gate drivers and current sense amplifiers from back-EMF during brushed DC motor commutation. IC Role / Device Role / Timing Role: Localized TVS across motor terminals and driver supply pins, activated synchronously with MOSFET turn-off events. Use Value: Reduces false triggering and analog measurement errors caused by µs-scale voltage spikes on shared ground planes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0A | DO-214AA package (SMB), 8.0 V nominal VBR, 1000 W PPPM, surface-mount | Lower power rating and smaller footprint; suited for space-constrained PCBs but requires re-layout | Select SMBJ8.0A when board area is limited and 1000 W surge capacity suffices for end-equipment class |
| 1.5KE8.2CA | Bidirectional variant, same VBR range and PPPM, identical DO-201AD package | Protects AC-coupled or differential signal lines (e.g., RS-485, CAN) where polarity reversal occurs | Choose 1.5KE8.2CA only if bidirectional clamping is required; otherwise, unidirectional 1.5KE8.2A-E3/51 offers lower leakage and tighter VWM |
Compared with SMBJ8.0A, the 1.5KE8.2A-E3/51 delivers 50% higher surge power in a through-hole package ideal for high-reliability power entry points; versus 1.5KE8.2CA, it provides superior DC rail protection due to lower reverse leakage and optimized unidirectional clamping asymmetry.
Availability
1.5KE8.2A-E3/51 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O protection, and telecom power supply designs requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for 1.5KE8.2A-E3/51 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, precision, and automotive-grade qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure modes demand proven surge robustness and long-term parametric stability.
FAQ
What is the breakdown voltage tolerance for 1.5KE8.2A-E3/51?
The 1.5KE8.2A-E3/51 has a guaranteed breakdown voltage range of 7.79 V to 8.61 V at 10 mA test current, corresponding to ±5% tolerance around the nominal 8.2 V rating. This tight VBR spread ensures consistent clamping performance across production lots and supports predictable circuit design margins without derating overhead.
Does 1.5KE8.2A-E3/51 meet automotive qualification standards?
The base 1.5KE8.2A-E3/51 is commercial-grade; however, the AEC-Q101 qualified version is available as 1.5KE8.2AHE3_B (with "HE3" and revision code). That variant undergoes stress testing per AEC-Q101 including HTSL, TC, and UHAST, making it suitable for automotive body electronics and infotainment power domains where qualification is mandatory.
How does the clamping voltage of 1.5KE8.2A-E3/51 compare to its breakdown voltage?
At its rated peak pulse current of 124 A, the 1.5KE8.2A-E3/51 clamps to 12.1 V - a 47% increase over its minimum VBR of 7.79 V. This clamping ratio reflects low dynamic impedance and confirms effective energy diversion without excessive voltage overshoot, critical for protecting 5 V or 3.3 V logic interfaces downstream.
Can 1.5KE8.2A-E3/51 be used in bidirectional signal protection?
No - the 1.5KE8.2A-E3/51 is strictly unidirectional and must be oriented with cathode toward the protected voltage rail. For bidirectional protection (e.g., RS-485, USB, or AC lines), the functionally matched 1.5KE8.2CA variant must be used, which provides symmetrical clamping in both polarities and shares identical package and power ratings.
What is the maximum allowable reverse leakage current for 1.5KE8.2A-E3/51 at room temperature?
At VWM = 7.02 V and TA = 25 °C, the 1.5KE8.2A-E3/51 exhibits ≤200 µA maximum reverse leakage current. This low leakage preserves power efficiency in always-on circuits and avoids false triggering in high-impedance sensing nodes, distinguishing it from higher-leakage alternatives like standard Zener diodes.
1.5KE8.2A-E3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7.02V
- Voltage - Breakdown (Min):
- 7.79V
- Voltage - Clamping (Max) @ Ipp:
- 12.1V
- Current - Peak Pulse (10/1000µs):
- 124A
- 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
1.5KE8.2A-E3/51 FAQ
1.How can I place an order for 1.5KE8.2A-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE8.2A-E3/51 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 1.5KE8.2A-E3/51 reliable?
The price and inventory of 1.5KE8.2A-E3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE8.2A-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE8.2A-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE8.2A-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE8.2A-E3/51?
1.5KE8.2A-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE8.2A-E3/51 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 1.5KE8.2A-E3/51?
For technical support, including 1.5KE8.2A-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE8.2A-E3/51 requirements.
6.How does Aetrix verify that 1.5KE8.2A-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE8.2A-E3/51 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 1.5KE8.2A-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE8.2A-E3/51?
All 1.5KE8.2A-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE8.2A-E3/51, 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 1.5KE8.2A-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE8.2A-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE8.2A-E3/51 Tags
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