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Vishay General Semiconductor - Diodes Division 1.5KE82A/54
- Part No.:
- 1.5KE82A/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE82A/54.pdf
- Description:
- TVS DIODE 70.1VWM 113VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:9,838
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Product details
Overview
1.5KE82A from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary-level overvoltage protection in DC power rails and signal lines. It features a 77.9 V to 86.1 V breakdown voltage (VBR) at 1 mA, 70.1 V maximum standoff voltage (VWM), 113 V clamping voltage (VC) at 13.3 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5KE82A datasheet, 1.5KE82A pinout, 1.5KE82A application, or 1.5KE82A equivalent, this part delivers verified clamping performance, AEC-Q101-qualified variants (HE3 suffix), RoHS-compliant matte tin leads, and UL 94 V-0 molded epoxy packaging - critical for automotive power supply protection, industrial I/O conditioning, and telecom line interface design.
Technical Context
The 1.5KE82A operates as a silicon avalanche diode with glass-passivated junction, enabling sub-nanosecond response time (<1 ns) and low incremental surge resistance. Its unidirectional polarity uses a cathode band marking and supports reverse-biased clamping only - not bidirectional operation (1.5KE82CA is required for bidirectional use).
Thermal performance is defined by 15.4 °C/W junction-to-lead thermal resistance and 75 °C/W junction-to-ambient resistance, with derating above 25 °C ambient per Figure 2. It sustains 200 A non-repetitive forward surge current (8.3 ms half-sine) and exhibits 3.5 V max forward voltage at 100 A, confirming suitability for high-energy transient suppression without forward conduction interference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 77.9 V / 86.1 V at 1.0 mA - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 70.1 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 113 V at 13.3 A - clamped voltage during 1500 W transient, limiting downstream stress |
| PPPM | 1500 W (10/1000 µs) - peak surge energy handling capacity for lightning and EFT events |
| IFSM | 200 A (8.3 ms half-sine) - surge current robustness for inductive load switching |
| TJ range | –55 °C to +175 °C - extended junction temperature operation for under-hood automotive and industrial environments |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with 0.375" lead length, UL 94 V-0 compliant |
Pinout & Package
1.5KE82A uses the standard DO-201AD axial package (Case Style 1.5KE), with cathode identified by a color band on the body. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, rated for 275 °C dip soldering (10 s max). No internal pin numbering applies - it is a two-terminal device.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse-biased reference node | Connected to lower-potential side of protected circuit (e.g., ground or return path) |
| Cathode (banded end) | Avalanche clamping node / transient current sink | Connected to higher-potential rail (e.g., +12 V, +24 V, or signal line) to clamp overvoltage to VC |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| 1500 W peak pulse power (10/1000 µs) | Validated capability to absorb lightning surge waveforms per IEC 61000-4-5 Level 4 (4 kV) |
| Sub-nanosecond response time | Clamps transients before sensitive ICs experience damaging overvoltage (tR < 1 ns) |
| AEC-Q101 qualified option (1.5KE82AHE3_B) | Meets automotive-grade stress testing for engine control, body electronics, and ADAS power domains |
| UL 94 V-0 epoxy molding | Self-extinguishing housing prevents flame propagation in safety-critical enclosures |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 12 V/24 V power inputs in engine control units (ECUs) from load dump and alternator transients. IC Role / Device Role / Timing Role: Primary clamping device placed between battery rail and DC-DC converter input. Use Value: Limits voltage to ≤113 V during 13.3 A surge, preventing damage to LDOs and microcontrollers rated for 36 V absolute max. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC modules. IC Role / Device Role / Timing Role: Low-capacitance TVS placed at connector entry point to suppress ESD and cable discharge events. Use Value: Clamps 8/20 µs surges to 113 V within <1 ns, preserving signal integrity of 0–10 V or 4–20 mA loops without loading. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Front-end protection for Ethernet PHY power supplies and PoE injectors exposed to induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Unidirectional TVS on +48 V bias rail upstream of DC-DC isolation stage. Use Value: Absorbs 1500 W surges per ITU-T K.20/K.21, maintaining rail stability during multi-kV transients without latch-up. |
Use Scenario: Secondary-side overvoltage clamp in AC-DC adapters for smart home hubs and IoT gateways. IC Role / Device Role / Timing Role: Standoff-rated protector across bulk capacitor output to prevent capacitor overvoltage failure. Use Value: Withstands repeated 10/1000 µs pulses up to 0.01% duty cycle, extending adapter lifetime in surge-prone residential grids. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ80A | Lower PPPM (600 W), smaller SMB package (surface-mount), VC = 123 V @ 4.9 A | Better suited for space-constrained PCBs; insufficient for 1500 W lightning tests | Select when board area is limited and surge requirements are ≤IEC 61000-4-5 Level 2 |
| 1.5KE82CA | Bidirectional version; same VBR, VC, and PPPM; no polarity marking | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN bus) where polarity reversal occurs | Choose only when protecting symmetric differential or AC signals - not a drop-in replacement for unidirectional use |
Compared with 1.5KE82A, SMBJ80A trades peak power and ruggedness for compactness, while 1.5KE82CA adds bidirectional clamping capability at identical electrical ratings - making the latter essential for AC or differential interfaces but unsuitable as a direct unidirectional substitute.
Availability
1.5KE82A is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom line surge suppression requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for 1.5KE82A 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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where robustness against lightning, EFT, and load dump is mandatory.
FAQ
What is the breakdown voltage tolerance of the 1.5KE82A?
The 1.5KE82A has a guaranteed breakdown voltage (VBR) range of 77.9 V to 86.1 V at 1.0 mA test current, representing ±5.2% tolerance around the nominal 82 V rating. This tight distribution ensures consistent clamping behavior across production lots and enables predictable system-level overvoltage margining in designs using the 1.5KE82A.
Is the 1.5KE82A suitable for bidirectional signal line protection?
No - the 1.5KE82A is strictly unidirectional and must be installed with correct polarity (cathode toward the protected voltage rail). For bidirectional protection, the 1.5KE82CA variant is required. Using 1.5KE82A on AC or floating lines risks failure during negative transients, as it conducts only in reverse avalanche mode and blocks forward current beyond its 3.5 V forward voltage limit.
Does the 1.5KE82A meet automotive qualification standards?
The base 1.5KE82A is commercial-grade; however, the 1.5KE82AHE3_B variant is fully AEC-Q101 qualified and tested for temperature cycling, humidity, mechanical shock, and ESD per automotive stress requirements. This qualified version is recommended for under-hood ECUs, body control modules, and ADAS power domains where 1.5KE82A compliance with automotive reliability standards is mandatory.
What is the maximum clamping voltage of the 1.5KE82A during a 1500 W transient?
The 1.5KE82A clamps to a maximum of 113 V when subjected to its rated 1500 W peak pulse (10/1000 µs waveform) at 13.3 A peak current. This value is measured and guaranteed per datasheet Figure 7 and defines the upper voltage limit imposed on downstream circuitry during worst-case surge events - critical for validating safe operating area of protected ICs and passives in systems using the 1.5KE82A.
Can the 1.5KE82A be used in parallel to increase surge current handling?
Parallel connection of 1.5KE82A devices is not recommended due to mismatched VBR tolerances (±5.2%), which causes uneven current sharing and potential thermal runaway. For higher surge ratings, Vishay specifies larger packages (e.g., 3.0KE series) or stacked configurations with ballast resistors - not multiple 1.5KE82A units. System-level validation is required if parallel use is attempted despite this limitation.
1.5KE82A/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):
- 70.1V
- Voltage - Breakdown (Min):
- 77.9V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 13.3A
- 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
1.5KE82A/54 FAQ
1.How can I place an order for 1.5KE82A/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE82A/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 1.5KE82A/54 reliable?
The price and inventory of 1.5KE82A/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE82A/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE82A/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE82A/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE82A/54?
1.5KE82A/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE82A/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 1.5KE82A/54?
For technical support, including 1.5KE82A/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE82A/54 requirements.
6.How does Aetrix verify that 1.5KE82A/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE82A/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 1.5KE82A/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE82A/54?
All 1.5KE82A/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE82A/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 1.5KE82A/54 part is unused and in its original packaging.
Return procedure for 1.5KE82A/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE82A/54 Tags
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