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

Vishay General Semiconductor - Diodes Division 1.5KA22HE3/54

Name: 1.5KA22HE3/54
Brand: Vishay General Semiconductor - Diodes Division
SKU: 1.5KA22HE3/54
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1.5KA22HE3/54

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

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

Datasheet:: 1.5KA22HE3/54.pdf

Description:: TVS DIODE 17.8VWM 31.9VC 1.5KA

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Product details

Overview

1.5KA22HE3/54 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode designed for high-energy surge protection in harsh environments. It delivers 1500 W peak pulse power (10/1000 µs), clamps at 31.9 V under 47 A peak pulse current, and operates up to +185 °C junction temperature - enabling robust protection of MOSFETs and sensor signal lines in automotive powertrain control units.

For engineers reviewing the 1.5KA22HE3/54 datasheet, 1.5KA22HE3/54 pinout, 1.5KA22HE3/54 application, or 1.5KA22HE3/54 equivalent, key selection criteria include its AEC-Q101 qualification, 19.8–24.2 V breakdown range, low 0.092 %/°C V_BR tempco, and HE3 suffix meeting JESD201 Class 2 whisker resistance.

Technical Context

This TVS diode employs Vishay's patented PAR® construction for stable clamping under repetitive surge stress and high-temperature operation. Its unidirectional polarity and molded epoxy case with UL 94 V-0 rating support reliable performance in automotive under-hood applications where thermal cycling and mechanical vibration are present.

The device features low incremental surge resistance and fast response time - critical for suppressing transients induced by inductive load switching in 12 V/24 V vehicle systems. Its 10/1000 µs waveform rating aligns with ISO 7637-2 and SAE J1113-11 standards for automotive electrical immunity testing.

Key Specifications

Parameter	Value and Actual Design Meaning
V_BR (min/max)	19.8 V / 24.2 V - defines minimum and maximum voltage at which the device enters avalanche conduction under 1 mA test current
V_C @ I_PPM	31.9 V - maximum clamping voltage during 47 A 10/1000 µs surge, limiting downstream IC stress
P_PPM	1500 W - peak pulse power handling capability per 10/1000 µs waveform, supporting ISO 7637-2 Pulse 5a/b compliance
I_FSM	200 A - withstands 8.3 ms half-sine surge without failure, suitable for alternator load dump events
T_J max.	+185 °C - enables placement near high-heat sources like engine control modules without derating loss
V_WM	17.8 V - maximum continuous reverse working voltage; ensures no conduction during normal 12 V system operation
Tempco of V_BR	0.092 %/°C - low drift ensures stable clamping across -65 °C to +185 °C operating range

Pinout & Package

Package: Case Style 1.5KA - axial-leaded, molded epoxy body with matte tin-plated leads; RoHS-compliant HE3 suffix; UL 94 V-0 rated; 0.375" (9.5 mm) lead length; 0.210" (5.3 mm) body diameter.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to ground or low-side return path in unidirectional TVS configuration
Cathode	Avalanche conduction terminal	Marked with color band; connected to protected line (e.g., sensor supply or CAN bus) to clamp positive transients

Key Features

Feature	Design Value
Patented PAR® construction	Enables consistent clamping performance over 1000+ surge cycles without parameter shift
AEC-Q101 qualified	Validated for automotive use including temperature cycling, mechanical shock, and humidity exposure per standard
JESD201 Class 2 whisker resistance	Prevents tin whisker growth under thermal stress, eliminating risk of latent short-circuit failure
10/1000 µs waveform rating	Matches real-world automotive load dump and inductive switching transient profiles per ISO 7637-2
Solder dip 260 °C, 40 s	Supports standard lead-free reflow and wave soldering processes without degradation

Applications

Engine Control Unit (ECU) Power Input Protection	Automotive Sensor Signal Line Protection
Use Scenario: Protects ECU main 12 V input against load dump transients up to 120 V lasting 400 ms. IC Role / Device Role / Timing Role: Unidirectional TVS clamps positive surges while remaining non-conductive during nominal operation. Use Value: Limits voltage seen by downstream DC/DC converters and microcontrollers to ≤31.9 V, preventing latch-up or permanent damage.	Use Scenario: Shields analog outputs of pressure or temperature sensors from inductive kickback in HVAC actuators. IC Role / Device Role / Timing Role: Fast-response TVS absorbs sub-100 ns transients before they reach precision ADC front-ends. Use Value: Maintains signal integrity with <1 µA leakage at 17.8 V, avoiding offset errors in millivolt-level sensor signals.
Body Control Module (BCM) LIN Bus Protection	Start-Stop System Battery Monitoring Circuit
Use Scenario: Guards LIN transceiver pins against ESD and cable discharge events in door module wiring harnesses. IC Role / Device Role / Timing Role: Acts as first-line transient shunt on bidirectional LIN bus lines with minimal capacitance impact. Use Value: Delivers 1500 W surge handling without exceeding 31.9 V clamp, preserving LIN physical layer timing margins.	Use Scenario: Protects battery voltage monitoring ICs during cranking and alternator field collapse in 12 V start-stop systems. IC Role / Device Role / Timing Role: Absorbs 200 A 8.3 ms surge pulses without thermal runaway, ensuring uninterrupted SoC estimation. Use Value: Sustains operation at +185 °C ambient, matching under-hood battery sensor mounting locations.

Engine Control Unit (ECU) Power Input Protection

Automotive Sensor Signal Line Protection

Use Scenario: Protects ECU main 12 V input against load dump transients up to 120 V lasting 400 ms.

IC Role / Device Role / Timing Role: Unidirectional TVS clamps positive surges while remaining non-conductive during nominal operation.

Use Value: Limits voltage seen by downstream DC/DC converters and microcontrollers to ≤31.9 V, preventing latch-up or permanent damage.

Use Scenario: Shields analog outputs of pressure or temperature sensors from inductive kickback in HVAC actuators.

IC Role / Device Role / Timing Role: Fast-response TVS absorbs sub-100 ns transients before they reach precision ADC front-ends.

Use Value: Maintains signal integrity with <1 µA leakage at 17.8 V, avoiding offset errors in millivolt-level sensor signals.

Body Control Module (BCM) LIN Bus Protection

Start-Stop System Battery Monitoring Circuit

Use Scenario: Guards LIN transceiver pins against ESD and cable discharge events in door module wiring harnesses.

IC Role / Device Role / Timing Role: Acts as first-line transient shunt on bidirectional LIN bus lines with minimal capacitance impact.

Use Value: Delivers 1500 W surge handling without exceeding 31.9 V clamp, preserving LIN physical layer timing margins.

Use Scenario: Protects battery voltage monitoring ICs during cranking and alternator field collapse in 12 V start-stop systems.

IC Role / Device Role / Timing Role: Absorbs 200 A 8.3 ms surge pulses without thermal runaway, ensuring uninterrupted SoC estimation.

Use Value: Sustains operation at +185 °C ambient, matching under-hood battery sensor mounting locations.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ22AHE3/52	Lower P_PPM (600 W), smaller SMB package, bidirectional option available	Better suited for space-constrained PCBs but insufficient for full load dump compliance	Select when board area is critical and surge energy is limited to ISO 7637-2 Pulse 1/2 only
1.5KE22A	Same V_BR range but non-automotive grade; no AEC-Q101 or JESD201 whisker certification	Lacks qualification for safety-critical automotive modules; higher failure risk in long-life deployments	Acceptable for industrial or consumer applications where automotive reliability is not mandated

Compared with SMBJ22AHE3/52 and 1.5KE22A, the 1.5KA22HE3/54 provides uniquely validated automotive robustness - combining AEC-Q101 qualification, 1500 W surge capacity, and +185 °C operation - making it the only choice for under-hood ECU and battery monitoring designs requiring zero field returns.

Availability

1.5KA22HE3/54 is available at Aetrix Electronics and suitable for automotive powertrain control, sensor interface protection, and start-stop system battery monitoring requiring stable component supply across extended production lifecycles.

Supply support for 1.5KA22HE3/54 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 automotive transient suppression - delivering AEC-Q101 qualified surge resilience, high-temperature stability, and repeatable clamping performance in engine bay and chassis-mounted electronics.

FAQ

What is the breakdown voltage range of the 1.5KA22HE3/54?

The 1.5KA22HE3/54 has a guaranteed breakdown voltage (V_BR) range of 19.8 V to 24.2 V at 1 mA test current, measured per ANSI/IEEE C62.35. This range ensures reliable turn-on during transients while maintaining margin above 12 V system nominal voltage and allowing for manufacturing tolerance and temperature drift.

Is the 1.5KA22HE3/54 suitable for automotive under-hood applications?

Yes, the 1.5KA22HE3/54 is AEC-Q101 qualified and rated for operation from -65 °C to +185 °C junction temperature. Its PAR® construction, UL 94 V-0 molding compound, and JESD201 Class 2 whisker-resistant leads make it explicitly designed for under-hood deployment in ECUs, battery sensors, and transmission control modules.

What does the HE3/54 suffix mean in 1.5KA22HE3/54?

The HE3 suffix indicates RoHS-compliant, high-reliability automotive grade with JESD201 Class 2 whisker resistance. The /54 denotes packaging in 13" diameter paper tape and reel, with base quantity 1400 units - standard for automated SMT placement of axial-leaded components using carrier tape feeders.

How does the 1.5KA22HE3/54 compare to standard 1.5KE series TVS diodes?

The 1.5KA22HE3/54 differs from generic 1.5KE22A in three verified ways: it is AEC-Q101 qualified, features HE3 whisker-resistant plating, and is specified for +185 °C operation versus +175 °C for 1.5KE. These distinctions make 1.5KA22HE3/54 appropriate for safety-critical automotive systems where long-term reliability is mandatory.

What is the maximum clamping voltage of the 1.5KA22HE3/54 during a surge event?

The 1.5KA22HE3/54 exhibits a maximum clamping voltage (V_C) of 31.9 V when subjected to its rated 47 A peak pulse current (I_PPM) under the standardized 10/1000 µs waveform. This value is measured at T_A = 25 °C and ensures downstream circuitry remains within safe operating limits during ISO 7637-2 Pulse 5a/b events.

1.5KA22HE3/54 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

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

Series:: PAR®

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Type:: Zener

Unidirectional Channels:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 17.8V

Voltage - Breakdown (Min):: 19.8V

Voltage - Clamping (Max) @ Ipp:: 31.9V

Current - Peak Pulse (10/1000µs):: 47A

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

1.5KA22HE3/54 FAQ

1.How can I place an order for 1.5KA22HE3/54 through Aetrix?

Please submit a Request for Quotation (RFQ) for 1.5KA22HE3/54 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 1.5KA22HE3/54 reliable?

The price and inventory of 1.5KA22HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA22HE3/54 is usually 5 days.

3.What payment methods are accepted for 1.5KA22HE3/54?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA22HE3/54 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1.5KA22HE3/54?

1.5KA22HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1.5KA22HE3/54 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 1.5KA22HE3/54?

For technical support, including 1.5KA22HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA22HE3/54 requirements.

6.How does Aetrix verify that 1.5KA22HE3/54 is sourced from the original manufacturer or authorized distributors?

All 1.5KA22HE3/54 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 1.5KA22HE3/54 meets industry standards.

7.What is the process for return or replacement of 1.5KA22HE3/54?

All 1.5KA22HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA22HE3/54, 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 1.5KA22HE3/54 part is unused and in its original packaging.

Return procedure for 1.5KA22HE3/54:

1.Submit a request within 90 days.

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

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