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Vishay General Semiconductor - Diodes Division 1.5KA43AHE3/51
- Part No.:
- 1.5KA43AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA43AHE3/51.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:6,631
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Product details
Overview
1.5KA43AHE3/51 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode in the 1.5KA case style, rated for 1500 W peak pulse power (10/1000 µs), 40.9–45.2 V breakdown voltage, and 185 °C max junction temperature. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients in automotive powertrain and body electronics.
For engineers reviewing the 1.5KA43AHE3/51 datasheet, 1.5KA43AHE3/51 pinout, 1.5KA43AHE3/51 application, or 1.5KA43AHE3/51 equivalent, key selection criteria include clamping voltage (59.3 V at 25.3 A), AEC Q101 qualification, RoHS-compliant HE3 packaging, and 1000 µA reverse leakage at 36.8 V stand-off voltage.
Technical Context
This TVS diode uses patented PAR® construction for stable high-temperature operation and low incremental surge resistance. Its unidirectional polarity enables robust clamping of positive-going transients on DC power rails and signal lines.
Designed for automotive environments, it delivers 1500 W peak pulse power with 10/1000 µs waveform compliance per ANSI/IEEE C62.35, and supports 200 A non-repetitive forward surge current (8.3 ms half-sine).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains high-energy transients without failure in automotive load-dump or inductive kick scenarios |
| Breakdown Voltage (VBR) | 40.9–45.2 V - ensures reliable triggering above system nominal voltage while avoiding false clamping |
| Clamping Voltage (VC) | 59.3 V at 25.3 A - limits downstream voltage stress to safe levels during surge events |
| Stand-off Voltage (VWM) | 36.8 V - maintains low leakage (<1 µA) under normal 24 V automotive rail operation |
| Max Junction Temperature | 185 °C - enables continuous operation in under-hood environments with minimal derating |
| AEC Q101 Qualified | Yes - validated for automotive reliability including temperature cycling, HTRB, and surge endurance |
| RoHS & Whisker Tested | HE3 suffix meets RoHS 2002/95/EC and JESD201 Class 2 whisker resistance |
Pinout & Package
Package: Case Style 1.5KA - molded epoxy body with matte tin-plated leads; UL 94 V-0 rated; 0.375" (9.5 mm) lead length; cathode denoted by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or lower-potential node in unidirectional clamp configuration |
| Cathode | Current exit point during clamping | Connected to protected line (e.g., 24 V rail or sensor output); marked by color band |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables stable VBR and low dynamic impedance across -65 °C to +185 °C operating range |
| 1500 W peak pulse rating | Withstands ISO 7637-2 Pulse 5a/b load-dump surges without degradation |
| Low clamping ratio (VC/VBR ≈ 1.33) | Minimizes overvoltage margin required for protected ICs' absolute maximum ratings |
| Solder dip rated 260 °C, 40 s | Compatible with standard lead-free reflow and wave soldering processes |
| Uni-directional polarity only | Optimized for DC-biased protection where reverse conduction is not required |
Applications
| Automotive Powertrain Control | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting MCU I/O and gate drivers in engine control units exposed to alternator load-dump transients up to 40 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed at power input and signal line entry points. Use Value: Limits transient voltage to ≤59.3 V, preventing latch-up or permanent damage to 3.3 V/5 V logic and 40 V-rated MOSFETs. | Use Scenario: Shielding 4–20 mA current-loop sensor outputs from ESD and inductive switching noise in factory automation PLCs. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected between signal line and ground, with 36.8 V VWM ensuring no interference during normal operation. Use Value: Maintains <1 µA leakage at 24 V supply, preserving loop accuracy while clamping >300 V transients within 1 ns response time. |
| Automotive Body Electronics | Telecom Power Supply Input |
Use Scenario: Safeguarding LIN bus transceivers and LED driver ICs in door modules subjected to battery reverse connection and jump-start surges. IC Role / Device Role / Timing Role: Primary overvoltage suppression element on 12 V/24 V supply rail upstream of LDOs and regulators. Use Value: Withstands 200 A 8.3 ms surge (IFSM), enabling robust protection without fuse coordination issues. | Use Scenario: Front-end transient suppression on 48 V telecom rectifier outputs feeding base station power management ICs. IC Role / Device Role / Timing Role: High-power unidirectional clamp absorbing lightning-induced surges per IEC 61000-4-5 Level 4. Use Value: Delivers 1500 W peak pulse capability with 0.097 %/°C VBR tempco, ensuring stable clamping across wide ambient ranges. |
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 range (40.9–45.2 V), but 600 W PPPM rating and SMB package (smaller footprint, lower thermal mass) | Lower power handling limits use to sub-1 kV surge environments; unsuitable for ISO 7637-2 Pulse 5 | Select when board space is constrained and peak surge energy is ≤600 W |
| 1.5KE43A | Same electrical specs but TO-204AA (DO-201AE) package; no AEC Q101 qualification; RoHS compliant but not HE3 whisker-tested | Not approved for automotive safety-critical systems; requires additional qualification for production deployment | Select for industrial/commercial designs where automotive qualification is unnecessary |
Compared with 1.5KA43AHE3/51, SMBJ43AHE3/52 trades surge robustness for compactness, while 1.5KE43A omits automotive reliability validation-making 1.5KA43AHE3/51 the sole choice for AEC Q101–mandated under-hood applications requiring 1500 W clamping.
Availability
1.5KA43AHE3/51 is available at Aetrix Electronics and suitable for automotive powertrain control, industrial sensor interface protection, and telecom power supply input applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 1.5KA43AHE3/51 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 diodes, rectifiers, and protection devices with emphasis on reliability, thermal performance, and automotive qualification.
The 1.5KA series was engineered specifically for high-energy transient suppression in harsh automotive environments, targeting AEC Q101 compliance, 185 °C operation, and robust PAR®-based junction stability.
FAQ
What is the clamping voltage of the 1.5KA43AHE3/51 at its rated peak pulse current?
The 1.5KA43AHE3/51 has a maximum clamping voltage (VC) of 59.3 V at 25.3 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting during standardized surge events. The 1.5KA43AHE3/51 achieves this clamping performance while maintaining low dynamic impedance due to its PAR® construction.
Is the 1.5KA43AHE3/51 qualified for automotive applications?
Yes, the 1.5KA43AHE3/51 is AEC Q101 qualified and designated as high-reliability automotive grade (Base P/NHE3). It undergoes rigorous testing including temperature cycling, high-temperature reverse bias (HTRB), and surge endurance per AEC Q101 requirements. The 1.5KA43AHE3/51 is intended for under-hood and body-control module applications where extended temperature range (-65 °C to +185 °C) and long-term reliability are mandatory.
What does the HE3 suffix indicate on the 1.5KA43AHE3/51?
The HE3 suffix on the 1.5KA43AHE3/51 denotes RoHS compliance, high-reliability construction, and passing JESD201 Class 2 whisker resistance testing. It confirms the device uses matte tin-plated leads compatible with J-STD-002 and JESD22-B102 solderability standards, and that the molding compound meets UL 94 V-0 flammability rating. The 1.5KA43AHE3/51 HE3 variant is specifically intended for automotive and industrial deployments demanding zero whisker risk.
How does the 1.5KA43AHE3/51 differ from the non-A version (1.5KA43HE3/51)?
The 1.5KA43AHE3/51 features tighter breakdown voltage tolerance (40.9–45.2 V) versus the broader 38.7–47.3 V range of 1.5KA43HE3/51, enabling more precise clamping near system overvoltage thresholds. Both share identical package, power rating, and AEC Q101 qualification, but the "A" suffix indicates enhanced VBR binning and is preferred for designs requiring consistent clamping behavior across production lots. The 1.5KA43AHE3/51 is the recommended choice for safety-critical automotive subsystems.
What is the maximum reverse leakage current of the 1.5KA43AHE3/51 at its stand-off voltage?
The 1.5KA43AHE3/51 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its stand-off voltage (VWM) of 36.8 V and ambient temperature (TA = 25 °C). At elevated junction temperature (TJ = 150 °C), leakage remains ≤1.0 µA, confirming stable performance across automotive operating conditions. This low leakage preserves efficiency in always-on circuits and avoids false triggering in high-impedance sensor interfaces.
1.5KA43AHE3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- PAR®
- Packaging:
- Bulk
- 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
1.5KA43AHE3/51 FAQ
1.How can I place an order for 1.5KA43AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA43AHE3/51 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 1.5KA43AHE3/51 reliable?
The price and inventory of 1.5KA43AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA43AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KA43AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA43AHE3/51 transactions.
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4.How is shipping managed for 1.5KA43AHE3/51?
1.5KA43AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA43AHE3/51 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 1.5KA43AHE3/51?
For technical support, including 1.5KA43AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA43AHE3/51 requirements.
6.How does Aetrix verify that 1.5KA43AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KA43AHE3/51 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 1.5KA43AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KA43AHE3/51?
All 1.5KA43AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA43AHE3/51, 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 1.5KA43AHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KA43AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA43AHE3/51 Tags
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