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Vishay General Semiconductor - Diodes Division 1.5KE43CAHE3_B/C
- Part No.:
- 1.5KE43CAHE3_B/C
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE43CAHE3_B/C.pdf
- Description:
- 1.5KW,43V 5%,BIDIR,AXIAL TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,469
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Product details
Overview
1.5KE43CAHE3_B/C from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 43 V breakdown voltage (VBR = 40.9–45.2 V at 1.0 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 59.3 V at 25.3 A, 175 °C max junction temperature, and RoHS-compliant AEC-Q101-qualified construction - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5KE43CAHE3_B/C datasheet, 1.5KE43CAHE3_B/C pinout, 1.5KE43CAHE3_B/C application, or 1.5KE43CAHE3_B/C equivalent, this page delivers verified electrical specs, bidirectional clamping behavior, JEDEC 1.5KE package details, thermal derating curves, and direct alternatives for ESD/lightning surge protection design-in.
Technical Context
This device operates as a silicon avalanche diode with glass-passivated junction, delivering symmetrical clamping in both polarities - critical for AC-coupled or floating signal paths. Its 10/1000 µs waveform response enables suppression of lightning-induced transients (IEC 61000-4-5 Level 3) and inductive switching spikes without degradation.
Designed for unclamped operation up to 36.8 V standoff (VWM), it maintains <1.0 µA reverse leakage at rated voltage and exhibits 0.101 %/°C temperature coefficient of VBR, ensuring stable threshold across automotive (-40 to +125 °C ambient) and industrial temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V at 1.0 mA - defines precise clamping onset threshold for bidirectional surge events |
| VWM | 36.8 V - maximum continuous working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 59.3 V at 25.3 A - peak clamped voltage during 1500 W transient, limiting downstream stress |
| PPPM | 1500 W (10/1000 µs) - sustains high-energy surges common in automotive load-dump and telecom line faults |
| TJ max | +175 °C - supports under-hood automotive placement and high-ambient industrial environments |
| Package | JEDEC DO-201AD (Case Style 1.5KE) - industry-standard axial-leaded package with 0.375" lead length for through-hole mounting |
| AEC-Q101 | Qualified - validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD |
Pinout & Package
1.5KE43CAHE3_B/C uses a two-terminal axial-leaded DO-201AD package (Case Style 1.5KE); no polarity marking on bidirectional variants - terminals are functionally symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | Bidirectional avalanche junction | Identical clamping behavior in either direction - no cathode band; interchangeable terminal use |
| Leads (matte tin plated) | Current path and thermal interface | Solderable per J-STD-002; supports 275 °C solder dip (10 s); RθJL = 15.4 °C/W enables PCB copper pour heat sinking |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term reliability and stable VBR under humidity and thermal cycling (JESD22-A101) |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 10/1000 µs surges up to 25.3 A without failure |
| Sub-nanosecond response time | Clamps transients within 1 ns - faster than MOVs or GDTs, protecting sensitive IC inputs |
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics |
| RoHS-compliant HE3 suffix | Meets JESD201 Class 2 whisker resistance and UL 94 V-0 flammability for safety-critical systems |
Applications
| Automotive Sensor Protection | Industrial PLC I/O |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role: Bidirectional clamping element placed across differential signal pairs or supply rails. Use Value: Limits transient voltage to ≤59.3 V while maintaining 36.8 V operating margin - prevents latch-up in 5 V/12 V sensor front-ends. | Use Scenario: Shielding digital input modules from inductive kickback when switching solenoids or contactors in factory automation. IC Role / Device Role: Primary surge suppressor on 24 V DC field wiring before optocoupler isolation stage. Use Value: Absorbs 1500 W surges without degradation, enabling >100,000 surge cycles per IEC 61000-4-5 compliance testing. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Safeguarding Ethernet PHYs and DSL line drivers against lightning-induced surges on outdoor copper lines. IC Role / Device Role: First-stage protector in hybrid protection circuits with gas discharge tubes (GDTs). Use Value: Fast 1 ns response captures initial surge edge before GDT fires, reducing let-through energy by >40 %. | Use Scenario: Secondary-side overvoltage clamp on 12 V/19 V DC outputs of wall adapters to prevent damage during output short-circuit recovery. IC Role / Device Role: Standby-mode TVS across output capacitor to suppress flyback spikes from transformer leakage inductance. Use Value: Withstands repetitive 10/1000 µs surges at 0.01 % duty cycle - extends adapter lifetime in high-surge environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA | DO-214AA package (SMB), lower PPPM = 600 W, same VBR range and bidirectional configuration | Suitable for space-constrained PCBs but requires derating for >1 kV lightning surges | Select when board area is limited and surge energy is ≤600 W; verify thermal relief via footprint copper |
| 1.5SMC43CA | Surface-mount DO-214AB (SMC) package, identical 1500 W rating and VBR, higher IPPM = 26.1 A | Enables automated assembly and improved high-frequency impedance vs. axial leads | Prefer for SMT production lines; confirm layout clearance for 2.5 mm creepage distance |
Compared with 1.5KE43CAHE3_B/C, SMBJ43CA trades peak power for compactness, while 1.5SMC43CA retains full 1500 W capability in surface-mount form - both require re-evaluation of trace inductance and thermal pad design to match the axial lead's low-inductance path and heatsinking.
Availability
1.5KE43CAHE3_B/C is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom infrastructure requiring stable component supply with AEC-Q101 validation and long-lifecycle support.
Supply support for 1.5KE43CAHE3_B/C 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 and automotive-grade qualification.
The 1.5KE family was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where failure due to voltage surges must be eliminated.
FAQ
What is the clamping voltage of the 1.5KE43CAHE3_B/C under a 10/1000 µs surge?
The 1.5KE43CAHE3_B/C clamps to a maximum of 59.3 V when subjected to its rated peak pulse current of 25.3 A (10/1000 µs waveform). This value is measured across both terminals in either polarity and represents the upper limit of voltage seen by protected circuitry during a full-power transient event - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the 1.5KE43CAHE3_B/C suitable for automotive applications?
Yes, the 1.5KE43CAHE3_B/C carries AEC-Q101 qualification (per note 2 in the Vishay datasheet), confirming it has passed stress tests for high-temperature operating life, thermal cycling, and ESD immunity required in automotive ECUs, body controllers, and sensor modules. Its 175 °C max junction temperature and RoHS-compliant HE3 construction further validate suitability for under-hood and chassis-mounted systems.
How does the bidirectional design of the 1.5KE43CAHE3_B/C affect its circuit placement?
The 1.5KE43CAHE3_B/C has no polarity marking and provides identical clamping in both directions - making it ideal for AC signal lines, differential buses (e.g., RS-485, CAN), or floating power rails where voltage reversals occur. Unlike unidirectional TVS diodes, it eliminates orientation errors during assembly and simplifies layout by removing the need for cathode alignment checks on the PCB.
What is the standoff voltage (VWM) of the 1.5KE43CAHE3_B/C, and why does it matter?
The 1.5KE43CAHE3_B/C has a maximum working voltage (VWM) of 36.8 V - the highest continuous DC or RMS voltage it can withstand without exceeding 1.0 µA leakage current. This parameter ensures reliable operation during normal system conditions while preserving sufficient margin (≥10 %) below VBR to avoid false triggering, especially in 24 V industrial or 36 V automotive auxiliary circuits.
Can the 1.5KE43CAHE3_B/C be used in parallel to increase surge handling capacity?
No - the 1.5KE43CAHE3_B/C should not be paralleled without external current-sharing resistors or matched dynamic impedance, as minor VBR tolerances (±5 %) cause uneven current division during transients. Vishay's application notes explicitly caution against direct paralleling; instead, use a single higher-rated device (e.g., 3.0KE series) or cascade stages with impedance isolation for multi-kW protection schemes.
1.5KE43CAHE3_B/C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 26A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE43CAHE3_B/C FAQ
1.How can I place an order for 1.5KE43CAHE3_B/C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE43CAHE3_B/C 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 1.5KE43CAHE3_B/C reliable?
The price and inventory of 1.5KE43CAHE3_B/C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE43CAHE3_B/C is usually 5 days.
3.What payment methods are accepted for 1.5KE43CAHE3_B/C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE43CAHE3_B/C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE43CAHE3_B/C?
1.5KE43CAHE3_B/C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE43CAHE3_B/C 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 1.5KE43CAHE3_B/C?
For technical support, including 1.5KE43CAHE3_B/C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE43CAHE3_B/C requirements.
6.How does Aetrix verify that 1.5KE43CAHE3_B/C is sourced from the original manufacturer or authorized distributors?
All 1.5KE43CAHE3_B/C 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 1.5KE43CAHE3_B/C meets industry standards.
7.What is the process for return or replacement of 1.5KE43CAHE3_B/C?
All 1.5KE43CAHE3_B/C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE43CAHE3_B/C, 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 1.5KE43CAHE3_B/C part is unused and in its original packaging.
Return procedure for 1.5KE43CAHE3_B/C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE43CAHE3_B/C Tags
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