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Vishay General Semiconductor - Diodes Division 1.5KA8.2HE3/73
- Part No.:
- 1.5KA8.2HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA8.2HE3/73.pdf
- Description:
- TVS DIODE 6.63VWM 12.5VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:7,197
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Product details
Overview
1.5KA8.2HE3/73 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode designed for clamping inductive load switching transients in power rails and signal lines. It features a 1500 W peak pulse power rating (10/1000 µs), 7.38–9.02 V breakdown voltage, 12.5 V maximum clamping voltage at 120 A, and AEC-Q101 qualification for under-hood automotive electronics.
For engineers reviewing the 1.5KA8.2HE3/73 datasheet, 1.5KA8.2HE3/73 pinout, 1.5KA8.2HE3/73 application, or 1.5KA8.2HE3/73 equivalent, key selection criteria include clamping voltage margin vs. protected IC VDD, junction temperature derating above 25 °C, IPPM capability under 10/1000 µs surge, and RoHS-compliant matte tin plating per J-STD-002.
Technical Context
This TVS operates as a voltage-clamping protection device in parallel with sensitive circuitry, triggering when reverse voltage exceeds its VBR range (7.38–9.02 V at 10 mA). Its patented PAR® construction enables low incremental surge resistance and fast response time (<1 ns), critical for suppressing ESD and load-dump transients before damage occurs.
It is rated for continuous operation from –65 °C to +185 °C junction temperature, with thermal derating applied above TA = 25 °C per Figure 2. The device sustains 200 A non-repetitive forward surge (8.3 ms half-sine) and exhibits a +0.065 %/°C VBR temperature coefficient - enabling predictable clamping behavior across automotive thermal profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 7.38 V / 9.02 V at 10 mA - defines precise turn-on threshold for overvoltage detection |
| VC @ IPPM | 12.5 V at 120 A - maximum clamped voltage during 10/1000 µs surge, limiting stress on downstream ICs |
| PPPM | 1500 W (10/1000 µs) - peak transient energy absorption capacity without failure |
| IFSM | 200 A (8.3 ms half-sine) - withstands high-current inrush events like motor startup or relay coil de-energization |
| TJ max. | +185 °C - supports under-hood placement in automotive ECUs and power modules |
| VWM | 6.63 V - maximum steady-state reverse voltage before leakage exceeds 200 µA, ensuring no false triggering |
| Temp. Coeff. | +0.065 %/°C - enables accurate clamping voltage prediction across full operating temperature range |
Pinout & Package
Case Style 1.5KA: axial-leaded DO-201AD package with molded epoxy body, UL 94 V-0 flammability rating, and cathode indicated by color band. Matte tin-plated leads meet J-STD-002 solderability and JESD22-B102 reliability standards; HE3 suffix confirms JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-voltage rail; forms current path during reverse-biased clamping |
| Cathode | Protected line input | Connected to line being protected (e.g., 12 V battery rail); voltage referenced to anode during clamping |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables consistent low dynamic impedance and repeatable clamping performance across surge cycles |
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, humidity bias, and mechanical shock |
| 1500 W peak pulse power | Handles ISO 7637-2 Pulse 5a (load dump) up to 35 V, 100 ms duration with margin |
| RoHS-compliant HE3 suffix | Meets JESD201 Class 2 whisker resistance and lead-free assembly compatibility |
| Fast response time | Sub-nanosecond turn-on ensures suppression of ESD (IEC 61000-4-2) and fast transients before IC latch-up |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in engine control units against load-dump transients. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed directly across VDD and GND pins of MCU. Use Value: Limits clamped voltage to 12.5 V, staying below typical 13.2 V absolute maximum rating of automotive MCUs while absorbing 1500 W surges. | Use Scenario: Shielding analog output lines of pressure sensors in factory automation systems from inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS connected between sensor output and ground to clamp negative-going transients. Use Value: Withstands 200 µA leakage at 6.63 V stand-off, preserving signal integrity while clamping spikes to ≤12.5 V within <1 ns. |
| Telecom DC Power Input Protection | Computer Peripheral USB VBUS Line Protection |
Use Scenario: Safeguarding PoE-powered network switches from lightning-induced surges on 48 V DC input rails. IC Role / Device Role / Timing Role: Primary TVS stage on DC input before DC-DC converter, sized for 1500 W peak dissipation. Use Value: Clamps 10/1000 µs surges to 12.5 V - compatible with upstream overvoltage protection ICs and downstream 50 V-rated capacitors. | Use Scenario: Preventing ESD damage to USB 2.0 host controllers during hot-plug events in docking stations. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on VBUS line, grounded via short trace to chassis. Use Value: 12.5 V clamping voltage ensures USB PHY remains within 5.5 V absolute max while handling ±15 kV contact discharge per IEC 61000-4-2. |
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 PPPM (600 W), higher VC (12.8 V), SMC package | Not AEC-Q101 qualified; suited for commercial-grade industrial equipment only | Select when cost sensitivity outweighs automotive qualification and 1500 W surge headroom is unnecessary |
| 1.5KE8.2A | Same VBR range but lower TJ max. (175 °C), non-automotive grade, DO-201AE package | Lacks JESD201 whisker resistance and AEC-Q101 validation; unsuitable for under-hood deployment | Choose only for legacy designs where HE3 suffix compliance and 185 °C operation are not required |
Compared with SMBJ8.0A and 1.5KE8.2A, the 1.5KA8.2HE3/73 delivers superior thermal robustness (185 °C), automotive qualification, and 2.5× higher surge power handling - making it the sole choice for new AEC-Q101-compliant designs requiring sustained reliability in harsh environments.
Availability
1.5KA8.2HE3/73 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, telecom power supplies, and computer peripheral protection requiring stable component supply and long-term lifecycle assurance.
Supply support for 1.5KA8.2HE3/73 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, rectifiers, and protection devices for demanding industrial and automotive applications.
The 1.5KA series was engineered specifically for AEC-Q101-compliant transient suppression in automotive power systems, emphasizing thermal stability, surge endurance, and process-controlled consistency across temperature extremes.
FAQ
What is the maximum clamping voltage of the 1.5KA8.2HE3/73 under a 10/1000 µs surge?
The 1.5KA8.2HE3/73 has a maximum clamping voltage (VC) of 12.5 V at its rated peak pulse current (IPPM) of 120 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuitry sees no more than 12.5 V during standardized surge events - critical for safeguarding 12 V automotive ICs with 13.2 V absolute maximum ratings. The 1.5KA8.2HE3/73 maintains this clamping performance across its full operating temperature range.
Is the 1.5KA8.2HE3/73 qualified for automotive applications?
Yes, the 1.5KA8.2HE3/73 is AEC-Q101 qualified and designated as an automotive-grade part (HE3 suffix). It undergoes rigorous testing for temperature cycling, high-temperature reverse bias, mechanical shock, and humidity resistance per the AEC-Q101 standard. Its +185 °C maximum junction temperature and JESD201 Class 2 whisker resistance further validate suitability for under-hood automotive ECUs, body control modules, and ADAS power supplies - all confirmed in Vishay Document Number 88300.
What does the HE3 suffix mean on the 1.5KA8.2HE3/73?
The HE3 suffix on the 1.5KA8.2HE3/73 indicates RoHS-compliant, high-reliability, automotive-grade construction. Specifically, it certifies compliance with JESD201 Class 2 whisker resistance, matte tin plating per J-STD-002, and full AEC-Q101 qualification. Unlike standard commercial variants, the HE3 version is screened for extended temperature operation (–65 °C to +185 °C) and subjected to additional reliability stress tests - making the 1.5KA8.2HE3/73 appropriate for mission-critical automotive deployments.
Can the 1.5KA8.2HE3/73 be used in bidirectional configurations?
No, the 1.5KA8.2HE3/73 is unidirectional only, as explicitly stated in the Vishay datasheet. It conducts in reverse bias above VBR and blocks forward current up to 3.5 V at 100 A. For bidirectional transient suppression (e.g., AC lines or differential data buses), a separate symmetric TVS pair or dedicated bidirectional device such as the SMAJ8.0CA must be selected - the 1.5KA8.2HE3/73 cannot be reconfigured or paralleled to achieve bidirectional behavior.
What is the standoff voltage (VWM) and leakage current of the 1.5KA8.2HE3/73 at room temperature?
The 1.5KA8.2HE3/73 has a maximum standoff voltage (VWM) of 6.63 V at 25 °C, with reverse leakage current limited to 200 µA at that voltage. At elevated temperature (TJ = 150 °C), leakage rises to 2000 µA - still within specification and verified per test condition (1) in the electrical characteristics table. This low VWM ensures reliable blocking during normal 12 V system operation while allowing rapid conduction when transients exceed 7.38 V.
1.5KA8.2HE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- PAR®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 6.63V
- Voltage - Breakdown (Min):
- 7.38V
- Voltage - Clamping (Max) @ Ipp:
- 12.5V
- Current - Peak Pulse (10/1000µs):
- 120A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KA
1.5KA8.2HE3/73 FAQ
1.How can I place an order for 1.5KA8.2HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA8.2HE3/73 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 1.5KA8.2HE3/73 reliable?
The price and inventory of 1.5KA8.2HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA8.2HE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KA8.2HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA8.2HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA8.2HE3/73?
1.5KA8.2HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA8.2HE3/73 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 1.5KA8.2HE3/73?
For technical support, including 1.5KA8.2HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA8.2HE3/73 requirements.
6.How does Aetrix verify that 1.5KA8.2HE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KA8.2HE3/73 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 1.5KA8.2HE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KA8.2HE3/73?
All 1.5KA8.2HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA8.2HE3/73, 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 1.5KA8.2HE3/73 part is unused and in its original packaging.
Return procedure for 1.5KA8.2HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA8.2HE3/73 Tags
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