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Vishay General Semiconductor - Diodes Division 1.5KA30HE3/73
- Part No.:
- 1.5KA30HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA30HE3/73.pdf
- Description:
- TVS DIODE 24.3VWM 43.5VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:8,055
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Product details
Overview
1.5KA30HE3/73 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 43.5 V under 34.5 A peak pulse current, and operates up to +185 °C junction temperature - ideal for protecting MOSFETs and sensor signal lines in automotive powertrain control units.
For engineers reviewing the 1.5KA30HE3/73 datasheet, 1.5KA30HE3/73 pinout, 1.5KA30HE3/73 application, or 1.5KA30HE3/73 equivalent, key selection criteria include its AEC Q101 qualification, 24.3 V stand-off voltage, low 0.097 %/°C VBR temperature coefficient, and RoHS-compliant HE3 packaging with matte tin-plated leads.
Technical Context
This TVS diode uses patented PAR® construction for stable clamping under repetitive surge stress and maintains performance across -65 °C to +185 °C operating range. Its unidirectional polarity, 10 mA breakdown test current, and 1.0 µA max reverse leakage at VWM support reliable overvoltage protection in DC-biased circuits.
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 automotive systems. Its 3.5 V max forward voltage at 100 A ensures minimal conduction loss during surge events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains high-energy surges without failure in automotive load-dump scenarios |
| Breakdown Voltage VBR | 27.0–33.0 V at 1.0 mA - defines precise clamping threshold for 24 V system protection |
| Stand-off Voltage VWM | 24.3 V - maximum continuous reverse voltage before significant leakage begins |
| Clamping Voltage VC | 43.5 V at 34.5 A IPPM - limits protected circuit voltage during worst-case surge |
| Operating Temperature Range | -65 °C to +185 °C - enables use in engine bay and transmission control modules |
| AEC Q101 Qualified | Yes - certified for automotive reliability per stress-test requirements |
| RoHS & WEEE Compliant | Yes - HE3 suffix denotes high-reliability, whisker-tested, lead-free construction |
Pinout & Package
Package: Case Style 1.5KA - molded epoxy body meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002 and JESD22-B102; cathode denoted by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to system ground in unidirectional TVS configuration | Low-impedance path to ground during surge; must be routed with minimal inductance |
| Cathode | Protected line connection; voltage reference point for clamping action | Connected to line being protected (e.g., sensor supply or CAN bus); color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables stable VBR and low dynamic impedance across temperature and lifetime stress |
| 1500 W peak pulse power (10/1000 µs) | Withstands ISO 7637-2 Pulse 5a load-dump transients in 24 V commercial vehicle systems |
| AEC Q101 qualification | Validated for automotive under-hood applications including powertrain and chassis ECUs |
| 0.097 %/°C VBR tempco | Minimizes clamping voltage drift over temperature - critical for consistent protection margin |
| HE3 suffix compliance | Meets JESD201 Class 2 whisker resistance and RoHS 2002/95/EC environmental requirements |
Applications
| Automotive Powertrain Control | Industrial Motor Drive Protection |
|---|---|
Use Scenario: Protecting gate drivers and current-sense amplifiers in 24 V diesel engine control modules exposed to alternator load dump. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient energy before it reaches sensitive analog front-ends. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic interfaces while maintaining AEC Q101 compliance. |
Use Scenario: Safeguarding IGBT gate terminals in variable-frequency drives subjected to inductive kickback from braking coils. IC Role / Device Role / Timing Role: Fast-response surge suppression on isolated gate drive lines to avoid false turn-on. Use Value: Limits VGE overshoot to <43.5 V, preserving gate oxide integrity and enabling robust 100 kcycle+ operation. |
| Automotive Sensor Signal Lines | Telecom Power Interface |
Use Scenario: Shielding LIN bus transceivers and pressure sensor outputs in HVAC control units against ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF at VWM) unidirectional clamp on bidirectional data lines. Use Value: Maintains signal integrity up to 20 kbps while passing ISO 10605 ±25 kV contact discharge testing. |
Use Scenario: Front-end protection for 48 V DC power inputs in remote radio units exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary surge arrestor upstream of DC-DC converters and hot-swap controllers. Use Value: Absorbs 1500 W pulses without degradation, enabling single-stage protection architecture and reducing BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33AHE3/52 | Lower PPPM (600 W), lower VC (53.3 V at 11.3 A), SMC package (smaller footprint) | Rated for less severe surge environments; not AEC Q101 qualified | Choose when space-constrained and surge energy is limited to ISO 7637-2 Pulse 1/2b only |
| 1.5KE33A | Same VBR range but non-automotive grade; no HE3 whisker testing; 175 °C TJ max | Lacks AEC Q101 validation and high-temp reliability for under-hood use | Select only for industrial or consumer applications where automotive qualification is unnecessary |
Compared with SMBJ33AHE3/52 and 1.5KE33A, the 1.5KA30HE3/73 provides higher surge robustness (1500 W vs. 600 W or 1500 W with lower thermal margin), guaranteed AEC Q101 compliance, and extended 185 °C operation - making it the sole choice for mission-critical automotive powertrain nodes.
Availability
1.5KA30HE3/73 is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive protection, and telecom power interface applications requiring stable component supply across long production lifecycles.
Supply support for 1.5KA30HE3/73 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 designs and manufactures discrete semiconductors with emphasis on reliability, precision, and application-specific performance for automotive, industrial, and computing markets.
The 1.5KA30HE3/73 belongs to Vishay's automotive TVS diode family engineered specifically for AEC Q101-compliant transient suppression in high-temperature, high-surge environments such as engine control units and battery management systems.
FAQ
What is the clamping voltage of the 1.5KA30HE3/73 under peak surge conditions?
The 1.5KA30HE3/73 clamps at a maximum of 43.5 V when subjected to its rated peak pulse current of 34.5 A using the standard 10/1000 µs waveform. This value is measured at TA = 25 °C and ensures protected downstream components remain below their absolute maximum voltage ratings during surge events. The 1.5KA30HE3/73 maintains this clamping performance across its full operating temperature range due to its low 0.097 %/°C VBR temperature coefficient.
Is the 1.5KA30HE3/73 suitable for use in automotive under-hood applications?
Yes, the 1.5KA30HE3/73 is explicitly qualified to AEC Q101 standards and rated for operation from -65 °C to +185 °C junction temperature - making it suitable for under-hood locations including engine control modules and transmission control units. Its HE3 suffix confirms compliance with JESD201 Class 2 whisker resistance and RoHS directives, fulfilling automotive manufacturing and reliability requirements. The 1.5KA30HE3/73 is designed for this environment.
What does the "HE3" suffix indicate on the 1.5KA30HE3/73 part number?
The "HE3" suffix on the 1.5KA30HE3/73 denotes Vishay's high-reliability, automotive-grade construction: RoHS-compliant matte tin plating, JESD201 Class 2 whisker resistance, and qualification per AEC Q101. It also indicates packaging in 13" paper tape and reel (package code 73), with base quantity 1400 units per reel. The 1.5KA30HE3/73 HE3 variant is distinct from non-HE3 versions in both process control and screening rigor.
How does the 1.5KA30HE3/73 differ from the 1.5KA30A variant?
The 1.5KA30HE3/73 and 1.5KA30A share identical electrical characteristics - including VBR (27.0–33.0 V), VWM (24.3 V), and VC (43.5 V) - but differ in qualification and packaging. The 1.5KA30HE3/73 carries AEC Q101 certification and HE3 reliability enhancements; the 1.5KA30A is a standard industrial version without automotive qualification. Both use Case Style 1.5KA, but only the 1.5KA30HE3/73 is approved for automotive production.
Can the 1.5KA30HE3/73 be used in bidirectional signal line protection?
No, the 1.5KA30HE3/73 is unidirectional only, as confirmed in its datasheet features section. It protects against positive transients on grounded-line configurations and cannot suppress negative-going surges on floating or AC-coupled lines. For bidirectional protection, a pair of 1.5KA30HE3/73 devices in series opposition or a dedicated bidirectional TVS such as SMAJ33A would be required - the 1.5KA30HE3/73 itself is not suitable for that topology.
1.5KA30HE3/73 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):
- 24.3V
- Voltage - Breakdown (Min):
- 27V
- Voltage - Clamping (Max) @ Ipp:
- 43.5V
- Current - Peak Pulse (10/1000µs):
- 34.5A
- 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
1.5KA30HE3/73 FAQ
1.How can I place an order for 1.5KA30HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA30HE3/73 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 1.5KA30HE3/73 reliable?
The price and inventory of 1.5KA30HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA30HE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KA30HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA30HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA30HE3/73?
1.5KA30HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA30HE3/73 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 1.5KA30HE3/73?
For technical support, including 1.5KA30HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA30HE3/73 requirements.
6.How does Aetrix verify that 1.5KA30HE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KA30HE3/73 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 1.5KA30HE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KA30HE3/73?
All 1.5KA30HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA30HE3/73, 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 1.5KA30HE3/73 part is unused and in its original packaging.
Return procedure for 1.5KA30HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA30HE3/73 Tags
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