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Vishay General Semiconductor - Diodes Division 1.5KE43AHE3/51
- Part No.:
- 1.5KE43AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE43AHE3/51.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:3,632
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Product details
Overview
1.5KE43AHE3/51 from Vishay General Semiconductor is a uni-directional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in power rails and signal lines. It features a 40.9 V minimum breakdown voltage (VBR), 36.8 V maximum stand-off voltage (VWM), 59.3 V clamping voltage at 25.3 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs), and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the 1.5KE43AHE3/51 datasheet, 1.5KE43AHE3/51 pinout, 1.5KE43AHE3/51 application, or 1.5KE43AHE3/51 equivalent, this device is selected for robust ESD and surge protection in DC power inputs, automotive body control modules, and industrial sensor interfaces where fast clamping (<1 ns), low leakage (<1 µA at VWM), and high surge current tolerance are required.
Technical Context
This TVS diode operates as a uni-directional avalanche clamp, triggered when reverse voltage exceeds its specified breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%), while the molded epoxy package provides UL 94 V-0 flammability compliance and matte tin-plated leads meeting J-STD-002 solderability standards.
The device delivers 1500 W peak pulse power handling with a 10/1000 µs waveform at 0.01% duty cycle, and exhibits low incremental surge resistance to minimize voltage overshoot during transient events. Thermal resistance is characterized at RθJA = 75 °C/W and RθJL = 15.4 °C/W, supporting reliable operation up to TJ = 175 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V - defines precise avalanche initiation window for predictable clamping onset |
| VWM | 36.8 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | 59.3 V at 25.3 A - peak clamped voltage during 1500 W transient, limiting downstream stress |
| IPPM | 25.3 A - maximum non-repetitive surge current it safely diverts without failure |
| PPPM | 1500 W - peak pulse power dissipation capability under standardized 10/1000 µs waveform |
| TJ max. | 175 °C - maximum junction temperature enabling use in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive electronics per stress test requirements (HTOL, TC, HAST, etc.) |
Pinout & Package
Package: Case Style 1.5KE - axial-leaded, molded epoxy body (UL 94 V-0), 0.375" (9.5 mm) lead length, 0.042" (1.07 mm) lead diameter. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to lower-potential side (e.g., GND or return path) in uni-directional configuration |
| Cathode (banded end) | Avalanche clamping node | Connected to protected line (e.g., +12 V rail); conducts during overvoltage to shunt energy to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures tight VBR tolerance (±5%) and long-term stability under thermal cycling |
| 1500 W peak pulse power (10/1000 µs) | Handles severe lightning-induced surges (IEC 61000-4-5 Level 4) on 12 V/24 V systems |
| Response time < 1 ns | Clamps transients before sensitive ICs (e.g., microcontrollers, CAN transceivers) experience damage |
| AEC-Q101 qualified | Validated for automotive applications including BCM, lighting control, and infotainment power supplies |
| RoHS-compliant HE3 suffix | Meets JESD 201 Class 2 whisker resistance and J-STD-002 solderability for high-reliability assembly |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (ISO 16750-2) and jump-start transients. IC Role / Device Role / Timing Role: Primary clamping element placed between input rail and ground, absorbing >1500 W surges within nanoseconds. Use Value: Limits voltage to ≤59.3 V during 25.3 A surge, preventing damage to downstream LDOs, MCUs, and CAN PHYs. | Use Scenario: Shielding analog outputs (e.g., 4–20 mA loops) of pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Uni-directional TVS connected anode-to-ground, cathode-to-signal line, clamping negative transients. Use Value: Maintains signal integrity with <1 µA leakage at 36.8 V, ensuring minimal offset error in precision measurement circuits. |
| Consumer Power Adapter Output Protection | Telecom DC Power Feeds |
Use Scenario: Safeguarding USB-C PD or 5 V/9 V/12 V wall adapter outputs against reverse polarity and surge coupling. IC Role / Device Role / Timing Role: Standoff-rated TVS (36.8 V) placed after secondary-side rectification to protect downstream USB controllers. Use Value: Withstands repeated 1500 W pulses without degradation, extending adapter field life in unregulated AC mains environments. | Use Scenario: Protecting -48 V telecom power distribution boards from induced surges on long feeder cables. IC Role / Device Role / Timing Role: Mounted across -48 V rail and return, leveraging uni-directional behavior to clamp positive-going spikes only. Use Value: Clamps to 59.3 V while sustaining 25.3 A peak current, preventing latch-up in PoE injectors and line cards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A | Lower PPPM (600 W), smaller SMB package (vs. axial 1.5KE), same VBR range | Preferred for space-constrained PCBs; less suited for high-energy load dump | Select SMBJ43A when board area is critical and surge energy is ≤600 W |
| 1.5KE43CA | Bi-directional version (same VBR, VC, PPPM), no polarity marking | Required for AC-coupled or bidirectional signal lines (e.g., RS-485, CAN bus) | Choose 1.5KE43CA only if protecting symmetric signals or floating rails needing dual-polarity clamping |
Compared with SMBJ43A and 1.5KE43CA, the 1.5KE43AHE3/51 offers superior 1500 W surge capacity in an axial through-hole package ideal for high-reliability power entry points, while maintaining AEC-Q101 qualification - making it optimal for automotive and industrial mains-connected designs where energy handling and qualification outweigh footprint constraints.
Availability
1.5KE43AHE3/51 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interface protection, and telecom DC power feed applications requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant surge immunity.
Supply support for 1.5KE43AHE3/51 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific performance.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where robustness against lightning, ESD, and load dump is non-negotiable.
FAQ
What is the breakdown voltage range of the 1.5KE43AHE3/51?
The 1.5KE43AHE3/51 has a guaranteed breakdown voltage (VBR) range of 40.9 V to 45.2 V at 1.0 mA test current, per Vishay's 88301 datasheet. This ±5% tolerance ensures consistent clamping behavior across production lots and supports reliable design margining in 36 V nominal systems. The 1.5KE43AHE3/51 achieves this via a precisely doped, glass-passivated silicon junction.
Is the 1.5KE43AHE3/51 suitable for automotive applications?
Yes, the 1.5KE43AHE3/51 is AEC-Q101 qualified per Vishay documentation, confirming its suitability for automotive electronics including engine control units, body control modules, and infotainment power supplies. Its 175 °C max junction temperature, robust surge rating (1500 W), and RoHS-compliant HE3 plating meet stringent automotive reliability and assembly requirements.
What does the 'HE3/51' suffix indicate in 1.5KE43AHE3/51?
The 'HE3' suffix denotes RoHS compliance and AEC-Q101 qualification, with matte tin plating meeting JESD 201 Class 2 whisker resistance. '/51' specifies the packaging: 13" paper tape and reel, 1400 units per reel. This distinguishes it from /54 (ammo pack) or /C (carrier tape) variants, ensuring correct logistics and assembly planning for the 1.5KE43AHE3/51.
How does the clamping voltage of the 1.5KE43AHE3/51 compare to its breakdown voltage?
The 1.5KE43AHE3/51 clamps to 59.3 V at its rated 25.3 A peak pulse current (IPPM), which is approximately 30% above its minimum breakdown voltage of 40.9 V. This incremental clamping voltage (ΔVC = 18.4 V) reflects low dynamic impedance, enabling effective energy diversion while limiting stress on downstream components during transient events.
Can the 1.5KE43AHE3/51 be used in bi-directional protection circuits?
No - the 1.5KE43AHE3/51 is strictly a uni-directional TVS diode, identified by its 'A' suffix and cathode band marking. For bi-directional protection (e.g., AC lines or differential buses), the functionally matched 1.5KE43CA must be used. Using the 1.5KE43AHE3/51 in reverse-biased configurations risks permanent failure due to lack of symmetrical avalanche structure.
1.5KE43AHE3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- 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:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE43AHE3/51 FAQ
1.How can I place an order for 1.5KE43AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE43AHE3/51 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 1.5KE43AHE3/51 reliable?
The price and inventory of 1.5KE43AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE43AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE43AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE43AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE43AHE3/51?
1.5KE43AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE43AHE3/51 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 1.5KE43AHE3/51?
For technical support, including 1.5KE43AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE43AHE3/51 requirements.
6.How does Aetrix verify that 1.5KE43AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE43AHE3/51 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 1.5KE43AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE43AHE3/51?
All 1.5KE43AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE43AHE3/51, 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 1.5KE43AHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KE43AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE43AHE3/51 Tags
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