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Vishay General Semiconductor - Diodes Division 1.5KA43AHE3/54
- Part No.:
- 1.5KA43AHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA43AHE3/54.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:9,781
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Product details
Overview
1.5KA43AHE3/54 from Vishay General Semiconductor is an automotive-grade unidirectional transient voltage suppressor (TVS) diode designed for high-energy surge clamping in power and signal lines. It delivers 1500 W peak pulse power (10/1000 µs), clamps at 59.3 V under 25.3 A peak pulse current, and operates up to +185 °C junction temperature. It is AEC-Q101 qualified and used to protect MOSFETs and sensor signal lines in automotive engine control units.
For engineers reviewing the 1.5KA43AHE3/54 datasheet, 1.5KA43AHE3/54 pinout, 1.5KA43AHE3/54 application, or 1.5KA43AHE3/54 equivalent, key selection criteria include breakdown voltage tolerance (40.9–45.2 V), clamping ratio (VC/VBR ≈ 1.32), RoHS-compliant HE3 packaging, and JESD201 Class 2 whisker resistance for high-reliability automotive deployments.
Technical Context
This TVS diode employs Vishay's patented PAR® construction for stable clamping under repetitive surge stress and maintains low incremental surge resistance (<0.5 Ω typical) across its 10/1000 µs waveform rating. Its unidirectional polarity and cathode-band marking align with standard PCB layout conventions for reverse-biased protection.
The device features a molded epoxy case rated UL 94 V-0, matte tin-plated leads compliant with J-STD-002 and JESD22-B102, and is specified for operation from –65 °C to +185 °C - enabling use in under-hood automotive environments without derating below 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains single high-energy transients from load dump or inductive switching without failure |
| Breakdown Voltage (VBR) | 40.9–45.2 V at 1 mA - defines precise clamping onset threshold for 43 V nominal systems |
| Clamping Voltage (VC) | 59.3 V at IPPM = 25.3 A - limits downstream voltage stress during worst-case surge events |
| Stand-off Voltage (VWM) | 36.8 V - ensures no conduction during normal 36 V automotive battery operation |
| Junction Temperature Range | –65 °C to +185 °C - supports direct mounting in high-temperature engine compartments |
| Surge Current (IFSM) | 200 A (8.3 ms half-sine) - withstands repeated cold-crank and jump-start surges |
| Leakage Current (ID) | 1 µA max at VWM and TJ = 150 °C - prevents parasitic drain in always-on vehicle modules |
Pinout & Package
Package: Case Style 1.5KA - axial-leaded, molded epoxy body (UL 94 V-0), 0.375" (9.5 mm) lead length, 0.210" (5.3 mm) body diameter. Cathode identified by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to protected line side (e.g., battery rail or signal source); not intended for sustained forward bias |
| Cathode | Current exit point during reverse clamping | Connected to ground reference; color band marks this terminal for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables consistent clamping performance over >1000 surge cycles without parameter drift |
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth in long-life applications (>15 yr), critical for safety-critical ECUs |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes overvoltage margin between clamping and IC absolute maximum ratings |
| RoHS-compliant HE3 suffix | Meets automotive ELV directive requirements and enables lead-free reflow compatibility |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Protects 12 V/24 V power inputs of microcontroller-based ECUs against ISO 7637-2 pulse 5a (load dump) and pulse 1 (inductive switch-off). IC Role / Device Role: Primary clamping element placed directly at connector entry before bulk capacitance. Use Value: Limits transient voltage to ≤59.3 V, preventing latch-up or gate oxide damage in 40 V-rated power MOSFETs and CAN transceivers. |
Use Scenario: Shields digital input channels on programmable logic controllers from field-wiring induced surges in factory automation. IC Role / Device Role: Standoff protection for optocoupler input stages and level-shifting buffers. Use Value: Maintains <1 µA leakage at 36.8 V stand-off, ensuring reliable logic-low detection while surviving 1500 W surges. |
| Automotive Sensor Signal Line | Telecom Power Supply Input |
Use Scenario: Installed on analog output lines (e.g., 0–5 V throttle position sensor) exposed to harness-level ESD and coupled noise. IC Role / Device Role: Low-capacitance (≈100 pF at VWM) shunt clamp adjacent to connector. Use Value: Clamps fast transients within nanoseconds while adding negligible signal distortion due to minimal junction capacitance. |
Use Scenario: Front-end protection for AC/DC power supplies in base station equipment subjected to lightning-induced surges on -48 V DC distribution rails. IC Role / Device Role: Secondary surge suppression stage following MOV primary protection. Use Value: Provides precise 59.3 V clamping to safeguard downstream DC-DC converters rated for 60 V absolute maximum input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43AHE3/52 | Same VBR (40.9–45.2 V) and VC (59.3 V), but lower PPPM = 600 W and smaller SMB package (JEDEC DO-214AA) | Limited to lower-energy transients; unsuitable for full load-dump protection in 24 V systems | Select when board space is constrained and surge energy does not exceed 600 W |
| 1.5KE43A | Same electrical specs but non-automotive grade; lacks AEC-Q101 qualification and JESD201 whisker testing | Not approved for safety-critical automotive functions; requires additional reliability validation for industrial use | Acceptable for cost-sensitive industrial designs where automotive qualification is unnecessary |
Compared with SMBJ43AHE3/52 and 1.5KE43A, the 1.5KA43AHE3/54 uniquely combines 1500 W surge capacity, AEC-Q101 compliance, and axial-leaded thermal robustness - making it the only choice for under-hood automotive power rail protection requiring zero derating above 125 °C.
Availability
1.5KA43AHE3/54 is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O protection, and telecom power supply hardening requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for 1.5KA43AHE3/54 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, and passive components for demanding industrial and automotive applications.
The 1.5KA series was engineered specifically for AEC-Q101-compliant transient suppression in harsh automotive environments - emphasizing thermal stability, surge endurance, and long-term whisker resistance in axial-leaded packages.
FAQ
What is the maximum clamping voltage of the 1.5KA43AHE3/54 under rated surge conditions?
The 1.5KA43AHE3/54 exhibits a maximum clamping voltage (VC) of 59.3 V when subjected to its rated peak pulse current of 25.3 A using the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees predictable overvoltage limiting for downstream 60 V-rated components. The 1.5KA43AHE3/54 maintains this clamping performance across its full operating temperature range up to +185 °C junction temperature.
Is the 1.5KA43AHE3/54 suitable for 24 V automotive load-dump protection?
Yes, the 1.5KA43AHE3/54 is explicitly qualified for 24 V automotive load-dump protection per ISO 7637-2 Pulse 5a. Its 36.8 V stand-off voltage (VWM) provides adequate margin above nominal 24 V system voltage, while its 1500 W peak pulse power rating exceeds the energy requirement for Class D load-dump events. The 1.5KA43AHE3/54's AEC-Q101 qualification confirms its suitability for under-hood deployment without derating below 150 °C.
Does the 1.5KA43AHE3/54 have bidirectional polarity?
No, the 1.5KA43AHE3/54 is available in uni-directional polarity only, as confirmed in the Vishay datasheet Document Number 88300. Its cathode is marked by a color band, and it conducts only during reverse-biased transients - functioning as a shunt clamp from protected line to ground. For bidirectional protection, two 1.5KA43AHE3/54 devices must be connected in series opposition, though Vishay does not recommend this configuration for this part number.
What is the meaning of the HE3/54 suffix in 1.5KA43AHE3/54?
The HE3 suffix denotes RoHS-compliant, high-reliability, automotive-grade construction meeting JESD201 Class 2 whisker resistance requirements. The /54 indicates the preferred package code: 13" diameter paper tape and reel, with a base quantity of 1400 units per reel. This packaging format supports automated SMT placement despite the axial-leaded form factor, and the HE3/54 designation confirms full compliance with automotive ELV and RoHS directives.
How does the 1.5KA43AHE3/54 compare to standard 1.5KE series TVS diodes?
The 1.5KA43AHE3/54 shares identical electrical specifications (VBR, VC, PPPM) with the 1.5KE43A but differs critically in qualification and construction: it is AEC-Q101 certified, uses PAR® technology for enhanced surge endurance, and passes JESD201 Class 2 whisker testing. Unlike the 1.5KE43A, the 1.5KA43AHE3/54 is manufactured to automotive process controls and lot traceability standards - making it mandatory for safety-critical vehicle subsystems where long-term reliability is non-negotiable.
1.5KA43AHE3/54 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):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 25.3A
- 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
1.5KA43AHE3/54 FAQ
1.How can I place an order for 1.5KA43AHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA43AHE3/54 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 1.5KA43AHE3/54 reliable?
The price and inventory of 1.5KA43AHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA43AHE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KA43AHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA43AHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA43AHE3/54?
1.5KA43AHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA43AHE3/54 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 1.5KA43AHE3/54?
For technical support, including 1.5KA43AHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA43AHE3/54 requirements.
6.How does Aetrix verify that 1.5KA43AHE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KA43AHE3/54 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 1.5KA43AHE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KA43AHE3/54?
All 1.5KA43AHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA43AHE3/54, 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 1.5KA43AHE3/54 part is unused and in its original packaging.
Return procedure for 1.5KA43AHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA43AHE3/54 Tags
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