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Vishay General Semiconductor - Diodes Division 1.5KA20HE3/54
- Part No.:
- 1.5KA20HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA20HE3/54.pdf
- Description:
- TVS DIODE 16.2VWM 29.1VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:3,944
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Product details
Overview
1.5KA20HE3/54 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode with 1500 W peak pulse power (10/1000 µs), 18.0–22.0 V breakdown voltage, and AEC-Q101 qualification for under-hood electronics protection. It clamps transients to ≤29.1 V at 51.5 A and operates from −65 °C to +185 °C junction temperature.
For engineers reviewing the 1.5KA20HE3/54 datasheet, 1.5KA20HE3/54 pinout, 1.5KA20HE3/54 application, or 1.5KA20HE3/54 equivalent, key selection criteria include clamping voltage at rated IPPM, temperature coefficient of VBR (0.090 %/°C), RoHS-compliant HE3 packaging, and compliance with ANSI/IEEE C62.35 surge standards.
Technical Context
This TVS diode uses patented PAR® construction for stable high-temperature operation and low incremental surge resistance. Its unidirectional polarity enables robust reverse-biased clamping during inductive load switching events, with fast response time and excellent clamping ratio (VC/VBR ≈ 1.37).
Designed for automotive environments, it supports 200 A non-repetitive forward surge current (8.3 ms half-sine), maintains <1 µA leakage at 16.2 V stand-off, and features matte tin-plated leads qualified per J-STD-002 and JESD22-B102 with JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains automotive load-dump and ISO 7637-2 transient suppression without failure |
| Breakdown Voltage (VBR) | 18.0–22.0 V at 1 mA - defines precise clamping onset for 24 V system rail protection |
| Clamping Voltage (VC) | 29.1 V at 51.5 A - limits downstream IC/MOSFET stress during worst-case surge events |
| Stand-off Voltage (VWM) | 16.2 V - ensures no conduction during normal 24 V nominal operation |
| Junction Temperature Range | −65 °C to +185 °C - enables placement near engines or powertrain ECUs |
| Temp. Coefficient of VBR | 0.090 %/°C - predicts minimal VBR drift over full automotive thermal range |
| RoHS & AEC-Q101 | Compliant - certified for automotive production use with traceable reliability data |
Pinout & Package
Case Style 1.5KA: axial-leaded, molded epoxy package (UL 94 V-0), 0.375" (9.5 mm) lead length, 0.210" (5.3 mm) body diameter. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return plane for effective clamping |
| Cathode | Protected line connection / surge input | Connected to signal/power line being protected; color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables stable VBR and low dynamic impedance across −65 °C to +185 °C, critical for engine bay mounting |
| 1500 W peak pulse rating | Meets ISO 7637-2 Pulse 5a (load dump) requirements for 24 V commercial vehicle systems |
| HE3 suffix qualification | Passes JESD201 Class 2 whisker testing and AEC-Q101 stress screening for automotive longevity |
| Low clamping ratio (VC/VBR) | ~1.37 ensures protected devices see <30 V stress even at full 51.5 A surge current |
| Matte tin-plated leads | Guarantees solderability per J-STD-002 and eliminates intermetallic growth risk in high-temp reflow |
Applications
| Automotive Engine Control Unit (ECU) Protection | Industrial PLC I/O Module Protection |
|---|---|
Use Scenario: Suppresses load-dump transients on 24 V supply lines feeding microcontrollers and CAN transceivers in diesel engine control units. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24 V rail and chassis ground to clamp surges before they reach sensitive logic. Use Value: Limits voltage seen by MCU and CAN PHY to ≤29.1 V during 1500 W pulses, preventing latch-up or gate oxide damage. | Use Scenario: Protects analog input channels (4–20 mA loops) in programmable logic controllers exposed to field wiring inductive kickback. IC Role / Device Role / Timing Role: TVS connected across input terminals to shunt transient energy away from precision op-amps and ADC front-ends. Use Value: Clamps 10/1000 µs surges to 29.1 V while maintaining <1 µA leakage at 16.2 V, preserving measurement accuracy. |
| Telecom Base Station Power Supply | Automotive ADAS Camera Power Line |
Use Scenario: Shields DC-DC converter inputs in outdoor telecom cabinets subjected to lightning-induced surges on -48 V distribution lines. IC Role / Device Role / Timing Role: Primary surge suppression device on secondary-side 24 V outputs feeding RF amplifiers and backhaul interfaces. Use Value: Withstands repeated 1500 W pulses and operates reliably up to +185 °C ambient, matching base station thermal profiles. | Use Scenario: Guards 12 V power input to surround-view camera modules mounted behind grilles or bumpers. IC Role / Device Role / Timing Role: Unidirectional TVS placed at connector entry point to absorb ESD and ISO 10605 pulses before reaching image sensor and serializer ICs. Use Value: AEC-Q101 qualification and 0.090 %/°C VBR drift ensure consistent clamping performance across extreme automotive temperature cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A | 600 W rating, lower IPPM (32.4 A), same VBR range but higher VC (32.4 V) | Rated for general industrial use; not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive qualification and 1500 W headroom is unnecessary |
| 1.5KE20A | Same 1500 W rating but TO-204AE (DO-41) package; no HE3 whisker or AEC-Q101 certification | Limited to non-automotive applications due to lack of automotive reliability validation | Choose only for legacy designs where axial DO-41 footprint is fixed and automotive qualification is not required |
Compared with SMBJ20A and 1.5KE20A, the 1.5KA20HE3/54 delivers higher surge robustness (51.5 A vs. ≤32.4 A), guaranteed automotive reliability (AEC-Q101 + JESD201 Class 2), and tighter thermal stability (0.090 %/°C vs. typical 0.10 %/°C), making it the sole choice for safety-critical 24 V vehicle subsystems.
Availability
1.5KA20HE3/54 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC I/O hardening, and telecom power supply surge suppression requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1.5KA20HE3/54 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, MOSFETs, optoelectronics, and passive components for demanding industrial and automotive applications.
The 1.5KA series was engineered specifically for automotive transient suppression, combining AEC-Q101 qualification, high-temperature junction capability (+185 °C), and PAR® technology to meet ISO 7637-2 and SAE J1113-11 requirements.
FAQ
What is the clamping voltage of the 1.5KA20HE3/54 at its rated peak pulse current?
The 1.5KA20HE3/54 has a maximum clamping voltage (VC) of 29.1 V at 51.5 A peak pulse current (IPPM) using a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures protected circuitry remains below critical voltage thresholds during standardized surge events. The 1.5KA20HE3/54 achieves this with low dynamic impedance enabled by its PAR® construction.
Is the 1.5KA20HE3/54 suitable for 24 V automotive systems?
Yes, the 1.5KA20HE3/54 is explicitly designed for 24 V automotive systems. Its 16.2 V stand-off voltage (VWM) provides margin above nominal 24 V rails, while its 18.0–22.0 V breakdown range and 29.1 V clamping voltage align with ISO 7637-2 Pulse 5a load-dump requirements. The 1.5KA20HE3/54 is AEC-Q101 qualified and rated for −65 °C to +185 °C operation.
What does the HE3 suffix indicate on the 1.5KA20HE3/54?
The HE3 suffix on the 1.5KA20HE3/54 denotes RoHS-compliant, high-reliability automotive grade construction. It confirms compliance with JESD201 Class 2 whisker testing, AEC-Q101 qualification, and matte tin-plated leads meeting J-STD-002 solderability standards. The 1.5KA20HE3/54's HE3 designation is integral to its suitability for under-hood and safety-critical vehicle applications.
How does the temperature coefficient affect the 1.5KA20HE3/54's performance?
The 1.5KA20HE3/54 has a VBR temperature coefficient of +0.090 %/°C, meaning its breakdown voltage increases predictably with junction temperature. At +150 °C, VBR rises ~1.35 V above its 25 °C value - a tightly controlled drift that maintains reliable clamping margin across automotive thermal extremes. This stability is enabled by the 1.5KA20HE3/54's PAR® structure.
Can the 1.5KA20HE3/54 be used in bidirectional configurations?
No, the 1.5KA20HE3/54 is unidirectional only, as confirmed in its Vishay datasheet Document Number 88300. It must be installed with cathode toward the protected line and anode to ground. For bidirectional protection, two 1.5KA20HE3/54 devices may be connected in series opposing configuration, but this is not a standard application and requires careful layout to avoid parasitic inductance effects.
1.5KA20HE3/54 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):
- 16.2V
- Voltage - Breakdown (Min):
- 18V
- Voltage - Clamping (Max) @ Ipp:
- 29.1V
- Current - Peak Pulse (10/1000µs):
- 51.5A
- 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
1.5KA20HE3/54 FAQ
1.How can I place an order for 1.5KA20HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA20HE3/54 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 1.5KA20HE3/54 reliable?
The price and inventory of 1.5KA20HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA20HE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KA20HE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA20HE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA20HE3/54?
1.5KA20HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA20HE3/54 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 1.5KA20HE3/54?
For technical support, including 1.5KA20HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA20HE3/54 requirements.
6.How does Aetrix verify that 1.5KA20HE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KA20HE3/54 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 1.5KA20HE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KA20HE3/54?
All 1.5KA20HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA20HE3/54, 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 1.5KA20HE3/54 part is unused and in its original packaging.
Return procedure for 1.5KA20HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA20HE3/54 Tags
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