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Vishay General Semiconductor - Diodes Division 1.5KE43CA/54
- Part No.:
- 1.5KE43CA/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE43CA/54.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,738
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Product details
Overview
1.5KE43CA/54 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), 36.8 V maximum standoff voltage (VWM), 59.3 V clamping voltage (VC) at 25.3 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5KE43CA/54 datasheet, 1.5KE43CA/54 pinout, 1.5KE43CA/54 application, or 1.5KE43CA/54 equivalent, this device delivers verified bidirectional clamping performance, AEC-Q101 qualification eligibility (HE3 suffix variants), glass-passivated junction reliability, and UL 94 V-0 molded epoxy packaging - critical for ESD and lightning surge immunity in harsh-environment electronics.
Technical Context
The 1.5KE43CA/54 operates as a voltage-clamped shunt protector: when transient voltage exceeds its VBR threshold, it avalanches into low-impedance conduction to divert surge current away from downstream circuitry. Its bidirectional symmetry ensures identical clamping behavior in both polarities, eliminating polarity-dependent layout constraints.
It sustains 1500 W peak pulse power under standardized 10/1000 µs waveform conditions at TA = 25 °C, with thermal derating governed by RθJA = 75 °C/W and RθJL = 15.4 °C/W. The device exhibits <1 ns response time and low incremental surge resistance - enabling protection of sensitive MOSFETs, microcontrollers, and analog front-ends against inductive switching spikes and EFT events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V at 1.0 mA - defines precise avalanche onset window for repeatable clamping trigger |
| VWM | 36.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 59.3 V at 25.3 A - clamping voltage during full 1500 W surge, limiting stress on protected ICs |
| PPPM | 1500 W - peak pulse power handling per 10/1000 µs waveform, supporting IEC 61000-4-5 Level 4 compliance |
| IPPM | 25.3 A - peak pulse current capacity at rated clamping voltage, validated for repetitive 0.01% duty cycle |
| TJ range | −55 °C to +175 °C - extended junction temperature operation suitable for under-hood automotive and industrial enclosures |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with matte tin-plated leads, UL 94 V-0 compliant epoxy body |
Pinout & Package
1.5KE43CA/54 uses the standard DO-201AD (Case Style 1.5KE) axial-leaded package. It has two terminals with no polarity marking - consistent with bidirectional TVS construction. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (unmarked) | Bidirectional avalanche junction | Identical clamping behavior in either direction; no cathode band - installed without orientation constraint |
| Lead 1 / Lead 2 | Current path for surge diversion | Leads serve as low-inductance connection points to PCB traces; thermal path optimized via RθJL = 15.4 °C/W |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| 1500 W peak pulse power (10/1000 µs) | Supports high-energy surge suppression without degradation across >1000 pulses at 0.01% duty cycle |
| Ultrafast response (<1 ns) | Clamps transients before sensitive logic or analog circuits experience damaging overvoltage |
| UL 94 V-0 epoxy molding | Provides flame-retardant mechanical encapsulation required for industrial and automotive safety certifications |
| AEC-Q101 qualification option (HE3 suffix) | Validates robustness for automotive applications including engine control, ADAS sensor interfaces, and body electronics |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role: Shunt-type transient suppressor placed directly across signal/power pins upstream of interface ICs. Use Value: Clamps 43 V nominal transients to ≤59.3 V within nanoseconds, preventing latch-up or gate oxide damage in 3.3 V/5 V sensor signal chains. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring surges and relay contact bounce. IC Role / Device Role: Primary overvoltage clamp on channel-level inputs, coordinated with series impedance and filtering. Use Value: Absorbs up to 1500 W of induced energy from inductive loads while maintaining VWM = 36.8 V compatibility with 24 V industrial supply rails. |
| Telecom Line Interface | Consumer Power Adapter Output |
Use Scenario: Secondary-side surge protection on Ethernet PHY power rails and RS-485 data lines exposed to lightning-induced surges in outdoor telecom cabinets. IC Role / Device Role: Bidirectional clamping element across VCC and GND, complementing primary MOV-based AC-line protection. Use Value: Provides precise 43 V clamping with sub-ns response - critical for protecting 3.3 V/5 V PHY ICs where MOVs alone lack speed or accuracy. |
Use Scenario: Output-stage overvoltage clamp in USB-C PD and multi-socket AC adapters to prevent damage from feedback-loop failures or Zener drift. IC Role / Device Role: Final line-of-defense TVS across regulated DC output (e.g., 20 V PPS), triggered only during fault conditions. Use Value: Limits fault voltage to 59.3 V with minimal leakage (<1 µA at 36.8 V), preserving efficiency and meeting UL 62368-1 transient immunity requirements. |
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 (SMB) surface-mount package; same VBR (40.9–45.2 V), lower PPPM = 600 W | Designed for space-constrained PCBs; unsuitable for high-energy surges exceeding 600 W | Select SMBJ43CA only when board area is limited and surge threat level is ≤IEC 61000-4-5 Level 2 |
| 1.5SMC43CA | DO-214AB (SMC) package; identical 1500 W rating and VBR, but higher VC = 69.4 V at 21.7 A | Higher clamping voltage increases stress on protected devices; requires margin verification in low-voltage systems | Choose 1.5SMC43CA if axial lead assembly is unavailable, but verify downstream IC VDS(max)/VIN(max) tolerances accommodate +10.1 V higher VC |
Compared with 1.5KE43CA/54, SMBJ43CA trades surge capacity for footprint reduction, while 1.5SMC43CA maintains power rating but raises clamping voltage - making the original 1.5KE43CA/54 optimal for cost-sensitive, high-reliability through-hole designs requiring precise 59.3 V clamping and proven axial thermal performance.
Availability
1.5KE43CA/54 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter outputs requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE43CA/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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power handling, and automotive-grade qualification.
The 1.5KE series was engineered for high-energy transient suppression in demanding environments - targeting automotive, industrial, and telecom applications where failure due to voltage surges must be eliminated through robust, standardized, and thermally efficient TVS solutions.
FAQ
What is the breakdown voltage tolerance for 1.5KE43CA/54?
The 1.5KE43CA/54 has a specified breakdown voltage range of 40.9 V to 45.2 V at 1.0 mA test current, representing ±5% tolerance around the nominal 43 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature extremes, critical for coordinating with downstream overvoltage protection thresholds in systems using the 1.5KE43CA/54.
Is 1.5KE43CA/54 suitable for automotive applications?
Yes - the 1.5KE43CA/54 base part meets commercial-grade specifications, and its HE3-suffix variant (e.g., 1.5KE43CAHE3_B) is AEC-Q101 qualified for automotive use. The 1.5KE43CA/54 itself is widely deployed in non-safety-critical automotive subsystems such as infotainment power rails and body control module sensor interfaces, leveraging its −55 °C to +175 °C operating range and glass-passivated junction stability.
How does the clamping voltage of 1.5KE43CA/54 compare to its breakdown voltage?
The 1.5KE43CA/54 clamps at 59.3 V when subjected to its rated 25.3 A peak pulse current (10/1000 µs), which is approximately 30% above its minimum breakdown voltage of 40.9 V. This VC–VBR margin reflects the device's low incremental surge resistance and ensures protected circuitry sees controlled overvoltage - a key design parameter confirmed in the 1.5KE43CA/54 datasheet's Fig. 7 and Table on page 2.
What package type does 1.5KE43CA/54 use, and is it RoHS compliant?
The 1.5KE43CA/54 uses the axial-leaded DO-201AD package (Case Style 1.5KE), with matte tin-plated leads and UL 94 V-0 compliant epoxy molding. The "E3" suffix in ordering codes (e.g., 1.5KE43CA-E3/54) explicitly denotes RoHS-compliant, commercial-grade construction per JESD 201 Class 1A whisker testing - fully documented in Vishay's 88301 datasheet revision 09-Aug-2022.
Can 1.5KE43CA/54 be used in bidirectional signal lines like RS-485?
Yes - the "CA" suffix confirms bidirectional functionality, meaning the 1.5KE43CA/54 provides symmetrical clamping in both polarities with identical VBR, VC, and IPPM characteristics. This makes it ideal for protecting balanced differential buses such as RS-485, CAN, or LVDS, where transients may appear with either polarity relative to ground - a capability explicitly validated in the 1.5KE43CA/54's electrical characteristics table and application notes.
1.5KE43CA/54 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:
- Obsolete
- 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):
- 25.3A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE43CA/54 FAQ
1.How can I place an order for 1.5KE43CA/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE43CA/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 1.5KE43CA/54 reliable?
The price and inventory of 1.5KE43CA/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE43CA/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE43CA/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE43CA/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE43CA/54?
1.5KE43CA/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE43CA/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 1.5KE43CA/54?
For technical support, including 1.5KE43CA/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE43CA/54 requirements.
6.How does Aetrix verify that 1.5KE43CA/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE43CA/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 1.5KE43CA/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE43CA/54?
All 1.5KE43CA/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE43CA/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 1.5KE43CA/54 part is unused and in its original packaging.
Return procedure for 1.5KE43CA/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE43CA/54 Tags
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