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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Vishay General Semiconductor - Diodes Division 1.5KA11HE3/73

Name: 1.5KA11HE3/73
Brand: Vishay General Semiconductor - Diodes Division
SKU: 1.5KA11HE3/73
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1.5KA11HE3/73

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: DO-201AA, DO-27, Axial

Datasheet:: 1.5KA11HE3/73.pdf

Description:: TVS DIODE 8.92VWM 16.2VC 1.5KA

Quantity:: RFQ Add To RFQ list

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Inventory:9,395

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Product details

Overview

1.5KA11HE3/73 from Vishay General Semiconductor is an automotive-grade unidirectional transient voltage suppressor (TVS) diode in the 1.5KA case style, rated for 1500 W peak pulse power (10/1000 µs), 9.9–12.1 V breakdown voltage (V_BR), and 185 °C maximum junction temperature. It provides clamping protection for MOSFETs and sensor signal lines in automotive powertrain control modules.

For engineers reviewing the 1.5KA11HE3/73 datasheet, 1.5KA11HE3/73 pinout, 1.5KA11HE3/73 application, or 1.5KA11HE3/73 equivalent, key selection criteria include AEC Q101 qualification, 16.2 V maximum clamping voltage at 92.6 A IPPM, low 0.075 %/°C V_BR temperature coefficient, and RoHS-compliant HE3 suffix meeting JESD201 Class 2 whisker resistance.

Technical Context

This TVS diode uses patented PAR® construction to achieve stable clamping under high-temperature automotive conditions (T_J up to +185 °C). Its unidirectional polarity enables DC-biased line protection with fast response time and low incremental surge resistance.

Designed for inductive load switching transients, it delivers 1500 W peak pulse power per 10/1000 µs waveform while maintaining 92.6 A peak pulse current and 16.2 V clamping voltage - critical for safeguarding 12 V automotive electronics against ISO 7637-2 pulses.

Key Specifications

Parameter	Value and Actual Design Meaning
V_BR (min/max)	9.9 V / 12.1 V - defines reliable conduction onset range under 1 mA test current
P_PPM	1500 W - sustains single high-energy transients without failure (10/1000 µs)
V_C @ I_PPM	16.2 V - maximum clamped voltage seen by protected circuit at 92.6 A surge
I_PPM	92.6 A - peak surge current capability at rated clamping voltage
T_J max.	+185 °C - enables operation in under-hood environments without derating
Temp. Coeff. V_BR	0.075 %/°C - ensures stable breakdown across wide ambient temperature swings
AEC Q101	Qualified - certified for automotive reliability per stress test requirements

Pinout & Package

Two-terminal axial-leaded device in Case Style 1.5KA: molded epoxy body with matte tin-plated leads; cathode denoted by color band; lead length 0.375" (9.5 mm); UL 94 V-0 compliant.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry point during forward conduction	Connects to ground or lower-potential rail in unidirectional TVS configuration
Cathode	Current exit point during reverse clamping	Connects to protected line; color band identifies this terminal for correct PCB orientation

Key Features

Feature	Design Value
Patented PAR® construction	Enables consistent clamping performance and thermal stability across 1000+ surge cycles
1500 W peak pulse power	Withstands severe load-dump and inductive-switching transients common in 12 V vehicle systems
AEC Q101 qualification	Validates reliability for automotive powertrain, body control, and ADAS subsystems
HE3 suffix compliance	Meets JESD201 Class 2 whisker resistance and RoHS 2002/95/EC environmental requirements
Low 0.075 %/°C V_BR drift	Maintains precise clamping threshold over -65 °C to +185 °C operating range

Applications

Engine Control Unit (ECU) Power Input Protection	Automotive Sensor Signal Line Protection
Use Scenario: Protects 12 V supply rail of engine control units against ISO 7637-2 Pulse 5a load dump transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamps voltage spikes above 16.2 V while diverting >90 A surge current to ground. Use Value: Prevents damage to MCU power regulators and CAN transceivers during alternator field collapse events.	Use Scenario: Shields analog output lines of pressure/temperature sensors from inductive kickback in HVAC actuators. IC Role / Device Role / Timing Role: Fast-response TVS limits transient voltage to ≤16.2 V within nanoseconds of event onset. Use Value: Maintains signal integrity and prevents false readings or ADC saturation during solenoid switching.
Body Control Module (BCM) LIN Bus Protection	Electric Power Steering (EPS) Motor Driver Protection
Use Scenario: Guards LIN bus transceiver I/O pins against ESD and board-level coupling transients. IC Role / Device Role / Timing Role: Clamps reverse transients on bidirectional LIN line using unidirectional configuration referenced to ground. Use Value: Ensures uninterrupted communication during door module actuation and lighting load switching.	Use Scenario: Safeguards H-bridge gate drivers from flyback voltage generated by EPS motor windings. IC Role / Device Role / Timing Role: Absorbs 1500 W energy surges during PWM commutation and emergency stop events. Use Value: Eliminates need for external snubbers and extends MOSFET lifetime in high-reliability steering systems.

Engine Control Unit (ECU) Power Input Protection

Automotive Sensor Signal Line Protection

Use Scenario: Protects 12 V supply rail of engine control units against ISO 7637-2 Pulse 5a load dump transients.

IC Role / Device Role / Timing Role: Unidirectional TVS clamps voltage spikes above 16.2 V while diverting >90 A surge current to ground.

Use Value: Prevents damage to MCU power regulators and CAN transceivers during alternator field collapse events.

Use Scenario: Shields analog output lines of pressure/temperature sensors from inductive kickback in HVAC actuators.

IC Role / Device Role / Timing Role: Fast-response TVS limits transient voltage to ≤16.2 V within nanoseconds of event onset.

Use Value: Maintains signal integrity and prevents false readings or ADC saturation during solenoid switching.

Body Control Module (BCM) LIN Bus Protection

Electric Power Steering (EPS) Motor Driver Protection

Use Scenario: Guards LIN bus transceiver I/O pins against ESD and board-level coupling transients.

IC Role / Device Role / Timing Role: Clamps reverse transients on bidirectional LIN line using unidirectional configuration referenced to ground.

Use Value: Ensures uninterrupted communication during door module actuation and lighting load switching.

Use Scenario: Safeguards H-bridge gate drivers from flyback voltage generated by EPS motor windings.

IC Role / Device Role / Timing Role: Absorbs 1500 W energy surges during PWM commutation and emergency stop events.

Use Value: Eliminates need for external snubbers and extends MOSFET lifetime in high-reliability steering systems.

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient suppression applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ11AHE3/52	Lower 400 W P_PPM, SMA package, 11.1–12.3 V V_BR, 18.2 V V_C	Rated for consumer/industrial use only; not AEC Q101 qualified	Select when space-constrained PCB layout requires SMD and automotive qualification is not required.
1.5KE11A	Same V_BR/V_C specs but TO-204AA (DO-4) package; no HE3 whisker rating or AEC Q101 certification	Lacks automotive reliability validation; higher thermal resistance than 1.5KA case	Choose only for non-automotive prototypes where cost is prioritized over long-term under-hood stability.

Compared with SMAJ11AHE3/52 and 1.5KE11A, the 1.5KA11HE3/73 delivers 3.75× higher surge power handling, AEC Q101 validation for 15-year vehicle life, and verified whisker resistance - making it the sole option for production automotive ECUs requiring zero field failures.

Availability

1.5KA11HE3/73 is available at Aetrix Electronics and suitable for automotive powertrain control, body electronics, and ADAS sensor interface designs requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for 1.5KA11HE3/73 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, MOSFETs, and passive components for demanding industrial and automotive applications.

The 1.5KA series was engineered specifically for automotive transient suppression, combining high-temperature junction stability, AEC Q101 qualification, and robust PAR® packaging to meet stringent OEM requirements for under-hood electronics protection.

FAQ

What is the clamping voltage of the 1.5KA11HE3/73 at its rated peak pulse current?

The 1.5KA11HE3/73 has a maximum clamping voltage (V_C) of 16.2 V when subjected to its rated peak pulse current (I_PPM) of 92.6 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees the protected circuit will not experience voltages exceeding 16.2 V during transient events, ensuring compatibility with 12 V automotive ICs and microcontrollers.

Is the 1.5KA11HE3/73 qualified for automotive applications?

Yes, the 1.5KA11HE3/73 is AEC Q101 qualified and designated as automotive grade (base P/N HE3). It meets rigorous stress testing requirements including high-temperature operating life, temperature cycling, and mechanical shock - validated for use in engine control units, body control modules, and other safety-critical automotive subsystems per Vishay Document Number 88300.

What does the HE3 suffix mean on the 1.5KA11HE3/73?

The HE3 suffix on the 1.5KA11HE3/73 indicates RoHS-compliant, high-reliability construction meeting JESD201 Class 2 whisker resistance, UL 94 V-0 flammability rating, and solderability per J-STD-002 and JESD22-B102. It confirms the device is intended for automotive and industrial applications where long-term interconnect integrity is essential.

How does the 1.5KA11HE3/73 differ from the 1.5KA11A variant?

The 1.5KA11HE3/73 and 1.5KA11A share identical electrical characteristics (V_BR: 9.9–12.1 V, V_C: 16.2 V, I_PPM: 92.6 A), but the HE3/73 version adds AEC Q101 qualification, JESD201 Class 2 whisker resistance, and RoHS compliance - whereas 1.5KA11A is a general-purpose variant without automotive certification or enhanced plating.

What is the maximum operating temperature for the 1.5KA11HE3/73?

The 1.5KA11HE3/73 has a maximum junction temperature (T_J) of +185 °C and an operating junction/storage temperature range of -65 °C to +185 °C. This extended range supports reliable operation in under-hood automotive environments, including proximity to engines and exhaust systems where ambient temperatures exceed 125 °C.

1.5KA11HE3/73 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):: 8.92V

Voltage - Breakdown (Min):: 9.9V

Voltage - Clamping (Max) @ Ipp:: 16.2V

Current - Peak Pulse (10/1000µs):: 92.6A

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

1.5KA11HE3/73 FAQ

1.How can I place an order for 1.5KA11HE3/73 through Aetrix?

Please submit a Request for Quotation (RFQ) for 1.5KA11HE3/73 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 1.5KA11HE3/73 reliable?

The price and inventory of 1.5KA11HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA11HE3/73 is usually 5 days.

3.What payment methods are accepted for 1.5KA11HE3/73?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA11HE3/73 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1.5KA11HE3/73?

1.5KA11HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1.5KA11HE3/73 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 1.5KA11HE3/73?

For technical support, including 1.5KA11HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA11HE3/73 requirements.

6.How does Aetrix verify that 1.5KA11HE3/73 is sourced from the original manufacturer or authorized distributors?

All 1.5KA11HE3/73 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 1.5KA11HE3/73 meets industry standards.

7.What is the process for return or replacement of 1.5KA11HE3/73?

All 1.5KA11HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA11HE3/73, 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 1.5KA11HE3/73 part is unused and in its original packaging.

Return procedure for 1.5KA11HE3/73:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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