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Vishay General Semiconductor - Diodes Division 1.5KE8.2A/54
- Part No.:
- 1.5KE8.2A/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE8.2A/54.pdf
- Description:
- TVS DIODE 7.02VWM 12.1VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:8,591
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Product details
Overview
1.5KE8.2A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for primary overvoltage protection of sensitive electronics. It features a 7.79 V to 8.61 V breakdown voltage (VBR) at 10 mA test current, 7.02 V maximum stand-off voltage (VWM), and clamps transients up to 12.1 V at 124 A peak pulse current (IPPM) under 10/1000 µs waveform - used in power supply input stages, automotive sensor interfaces, and industrial I/O protection.
For engineers reviewing the 1.5KE8.2A datasheet, 1.5KE8.2A pinout, 1.5KE8.2A application, or 1.5KE8.2A equivalent, this device delivers 1500 W peak pulse power, low clamping ratio (VC/VBR ≈ 1.49), glass-passivated junction reliability, and AEC-Q101 qualification options - critical for robust surge immunity in automotive ECUs and industrial controllers.
Technical Context
The 1.5KE8.2A operates as a silicon avalanche diode with unidirectional polarity, where the cathode band denotes the protected line side. Its clamping action responds in <1 ns, limiting induced surges before downstream ICs experience overstress. The device sustains 200 A non-repetitive forward surge current (IFSM) and exhibits 0.065 %/°C temperature coefficient of VBR, ensuring stable threshold behavior across -55 °C to +175 °C operating range.
Thermally, it uses a molded epoxy case (Case Style 1.5KE) with typical junction-to-lead thermal resistance of 15.4 °C/W, enabling effective heat dissipation during transient events. Its 10/1000 µs waveform rating aligns with IEC 61000-4-5 Level 4 surge immunity requirements, and its 1000 µA max reverse leakage at VWM supports low-power standby integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 7.79 V to 8.61 V at 10 mA - defines precise avalanche onset for reliable overvoltage triggering without false trips. |
| VWM | 7.02 V - maximum continuous working voltage; ensures no conduction during normal 5 V or 6 V rail operation. |
| VC @ IPPM | 12.1 V at 124 A - clamping voltage limits downstream component stress to safe levels during 1.5 kW surges. |
| PPPM | 1500 W - peak pulse power handling per 10/1000 µs waveform, meeting IEC 61000-4-5 surge test compliance. |
| IFSM | 200 A - single half-sine surge current rating (8.3 ms), supporting high-energy lightning-induced transients. |
| TJ max | +175 °C - extended junction temperature enables use in under-hood automotive and high-ambient industrial environments. |
| Package | DO-201AD (Case Style 1.5KE) - axial-leaded, RoHS-compliant package with matte tin-plated leads per J-STD-002. |
Pinout & Package
Package: DO-201AD molded epoxy case with axial leads; cathode indicated by color band on one end; lead spacing 9.5 mm (0.375″); meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference / low-side connection | Connected to system ground or return path; carries full surge current during clamping event. |
| Cathode | Protected line input / high-side connection | Connected to line being protected (e.g., 5 V rail, CAN bus, sensor supply); avalanche conduction occurs when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term reliability and moisture resistance vs. epoxy-only passivation, critical for automotive under-hood deployment. |
| 1500 W peak pulse power (10/1000 µs) | Enables single-device protection against severe surges per IEC 61000-4-5, reducing need for cascaded protection stages. |
| Clamping voltage ≤12.1 V at 124 A | Provides margin below 13.5 V absolute maximum ratings of common 12 V automotive MCUs and transceivers. |
| AEC-Q101 qualified option (1.5KE8.2AHE3_B) | Validated for automotive electronics per stress testing including HTGB, HTRB, and temperature cycling - required for ECU designs. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a), improving protection fidelity. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power rails in engine control units against load dump and ISO 7637-2 pulses. IC Role / Device Role: Primary clamping element placed between fused 12 V input and LDO/regulator input. Use Value: Limits transient voltage to ≤12.1 V, preventing latch-up or gate oxide damage in downstream 16-bit MCUs rated for 13.2 V max. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC analog input modules. IC Role / Device Role: Unidirectional TVS on 24 V sensor supply line, located adjacent to connector entry point. Use Value: Clamps 1 kV/500 A surge (IEC 61000-4-5) to safe levels before reaching precision op-amps and ADC front-ends. |
| Consumer Power Adapter Output Protection | Telecom DC Power Feeding Protection |
Use Scenario: Secondary-side overvoltage suppression on 5 V/9 V USB-C PD adapter outputs exposed to cable ESD and hot-plug transients. IC Role / Device Role: Final-stage TVS between DC-DC converter output and USB port VBUS line. Use Value: Responds in <1 ns to clamp 8 kV contact ESD (IEC 61000-4-2) and maintain VBUS within ±5% tolerance. |
Use Scenario: Protecting PoE-powered devices (e.g., IP cameras) from surges induced on 48 V DC feeding lines in outdoor installations. IC Role / Device Role: Unidirectional TVS on PSE-side DC feed line, upstream of DC-DC isolation stage. Use Value: Absorbs 1500 W surge energy without degradation, preserving isolation barrier integrity and preventing burnout of upstream MOSFETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0A | Lower 1000 W PPPM, smaller SMB package (vs. DO-201AD), 8.0 V nominal VBR (7.6–8.4 V range). | Better suited for space-constrained PCBs; lower surge capacity requires derating in high-energy environments. | Select when board area is limited and surge threat level is ≤1 kV/500 A (IEC 61000-4-5 Level 3). |
| 1.5KE8.2CA | Bidirectional variant; same VBR range but symmetrical clamping (±8.2 V); no polarity marking. | Required for AC-coupled or differential signal lines (e.g., RS-485, CAN FD) where voltage reversals occur. | Choose only when protecting bidirectional signals; not interchangeable with 1.5KE8.2A due to polarity and circuit topology. |
Compared with SMBJ8.0A, the 1.5KE8.2A offers 50% higher surge power handling and superior thermal mass for repeated transients; compared with 1.5KE8.2CA, it provides tighter VWM margin for DC rail protection but cannot suppress negative-going surges.
Availability
1.5KE8.2A is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and telecom power feeding systems requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE8.2A 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 high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments, emphasizing rugged packaging, AEC-Q101 qualification paths, and consistent clamping performance across temperature extremes.
FAQ
What is the breakdown voltage tolerance of the 1.5KE8.2A?
The 1.5KE8.2A 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 window ensures predictable clamping onset across production lots and temperature ranges, critical for protecting 5 V logic rails and 8 V analog supplies without premature conduction.
Is the 1.5KE8.2A suitable for automotive applications?
Yes - the 1.5KE8.2AHE3_B variant is AEC-Q101 qualified and tested for high-temperature bias, humidity, and mechanical shock per automotive standards. Even the commercial-grade 1.5KE8.2A operates from -55 °C to +175 °C and withstands 200 A surge current, making it appropriate for under-dash infotainment power inputs and body control module sensor protection when validated per system-level requirements.
How does the 1.5KE8.2A compare to the 1.5KE8.2CA in circuit implementation?
The 1.5KE8.2A is unidirectional and requires correct anode/cathode orientation relative to the protected DC rail; the 1.5KE8.2CA is bidirectional and symmetric, with no polarity marking. Using 1.5KE8.2A on an AC line risks open-circuit failure during negative half-cycles, while substituting 1.5KE8.2CA on a DC rail adds unnecessary cost and slightly higher leakage. The 1.5KE8.2A must be placed with cathode toward the protected line.
What is the maximum clamping voltage of the 1.5KE8.2A under surge conditions?
The 1.5KE8.2A clamps to a maximum of 12.1 V at its rated peak pulse current of 124 A (10/1000 µs waveform). This value is measured at the device terminals and represents worst-case voltage seen by downstream components during a full 1500 W transient. Designers must verify that this clamped voltage remains below the absolute maximum ratings of connected ICs, such as 13.2 V for many automotive MCUs.
Does the 1.5KE8.2A require heatsinking for standard surge duty cycles?
No external heatsink is required for single-event or low-duty-cycle surges (e.g., IEC 61000-4-5 testing at ≤4 pulses/minute), as the device's thermal mass and 15.4 °C/W junction-to-lead resistance dissipate energy effectively. However, for repetitive surge scenarios (>0.01% duty cycle), PCB copper area (≥1 cm² per lead) is recommended to avoid sustained junction temperatures exceeding +175 °C, especially above +85 °C ambient.
1.5KE8.2A/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):
- 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/54 FAQ
1.How can I place an order for 1.5KE8.2A/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE8.2A/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 1.5KE8.2A/54 reliable?
The price and inventory of 1.5KE8.2A/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE8.2A/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE8.2A/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE8.2A/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE8.2A/54?
1.5KE8.2A/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE8.2A/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 1.5KE8.2A/54?
For technical support, including 1.5KE8.2A/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE8.2A/54 requirements.
6.How does Aetrix verify that 1.5KE8.2A/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE8.2A/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 1.5KE8.2A/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE8.2A/54?
All 1.5KE8.2A/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE8.2A/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 1.5KE8.2A/54 part is unused and in its original packaging.
Return procedure for 1.5KE8.2A/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE8.2A/54 Tags
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Diodes Incorporated
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