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Vishay General Semiconductor - Diodes Division 1.5KE43CA-E3/51
- Part No.:
- 1.5KE43CA-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE43CA-E3/51.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:7,897
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Product details
Overview
1.5KE43CA-E3/51 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for high-energy surge 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, and operates across –55 °C to +175 °C junction temperature. It protects MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the 1.5KE43CA-E3/51 datasheet, 1.5KE43CA-E3/51 pinout, 1.5KE43CA-E3/51 application, or 1.5KE43CA-E3/51 equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, JEDEC 1.5KE package details, thermal resistance (RθJA = 75 °C/W), and RoHS-compliant commercial-grade sourcing through Aetrix Electronics.
Technical Context
This device uses a glass passivated silicon junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its bidirectional structure enables symmetrical clamping in AC-coupled or floating circuits without polarity concerns - unlike unidirectional variants that require cathode orientation.
The 1.5KE43CA-E3/51 complies with JEDEC case style 1.5KE, supports 10/1000 µs waveform testing per REA standards, and exhibits a temperature coefficient of VBR at +0.101 %/°C - enabling stable clamping performance over wide ambient ranges in automotive under-hood and industrial motor drive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V at 1.0 mA - defines precise voltage threshold where clamping initiates in both directions |
| VWM | 36.8 V - maximum continuous reverse working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 59.3 V at 25.3 A - actual clamped voltage during 1500 W surge, critical for downstream component voltage margining |
| PPPM | 1500 W - peak pulse power handling capability with 10/1000 µs waveform, duty cycle ≤ 0.01 % |
| TJ max | +175 °C - enables operation in high-temperature environments such as engine control units and industrial inverters |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, informs heatsinking requirements for sustained surge duty |
| IFSM | Not applicable - bidirectional configuration lacks defined forward surge rating (unidirectional only) |
Pinout & Package
Package: JEDEC-standard 1.5KE molded epoxy case (Case Style 1.5KE), axial-leaded, RoHS-compliant matte tin-plated leads. No polarity marking - symmetric bidirectional terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient conduction path | Either terminal serves as anode or cathode depending on instantaneous polarity - no orientation required during PCB placement |
| Lead 1 / Lead 2 | Current-carrying terminals | Leads provide mechanical support and thermal conduction path; RθJL = 15.4 °C/W enables effective lead-based heat dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance and long-term reliability under repeated surge stress without parameter drift |
| 1500 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly routed and decoupled |
| Sub-nanosecond response time | Clamps transients before sensitive logic or analog circuitry experiences overvoltage damage |
| UL 94 V-0 compliant molding | Meets flammability safety requirements for enclosed industrial and automotive enclosures |
| JEDEC 1.5KE footprint | Ensures mechanical compatibility with legacy TVS layouts and automated axial-leaded assembly processes |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator ripple surges. IC Role / Device Role: Primary clamping element placed across input rails upstream of DC/DC converters and LDOs. Use Value: Clamps 1500 W transients to ≤59.3 V, preserving downstream regulator input ratings and preventing latch-up in microcontrollers. | Use Scenario: Shielding 4–20 mA current loop transmitters and RS-485 nodes from ESD and lightning-induced surges. IC Role / Device Role: Bidirectional line protector on differential signal pairs or supply rails feeding analog front-ends. Use Value: Symmetrical clamping ensures equal protection regardless of signal polarity reversal, eliminating need for dual unidirectional devices. |
| Consumer AC-DC Adapter Input Stage | Telecom Line Card Surge Protection |
Use Scenario: Safeguarding primary-side rectifiers and switching FETs in offline SMPS against mains-borne surges. IC Role / Device Role: Across-line (L–N) or line-to-ground (L–G/N–G) TVS in Class II isolated power supplies. Use Value: Withstands 10/1000 µs surges up to 25.3 A while maintaining <1 µA leakage at 36.8 V, minimizing standby power loss. | Use Scenario: Front-end protection for DSL or POTS line interface ICs exposed to induced surges on outside plant wiring. IC Role / Device Role: First-stage shunt protector before hybrid transformers and line drivers. Use Value: Fast sub-ns response prevents overshoot propagation into sensitive receive amplifiers, meeting GR-1089-CORE surge immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA | Surface-mount SMB package; lower PPPM = 600 W; same VBR range and bidirectional function | Used where board space is constrained and automated SMT assembly is preferred over axial-leaded through-hole | Select SMBJ43CA when layout density or reflow process mandates SMD; verify thermal pad design meets 600 W derating curves. |
| 1.5KE43A-E3/51 | Unidirectional variant; identical VBR, VC, and PPPM, but requires correct cathode orientation and provides no negative-going clamping | Applicable only in DC-biased circuits where reverse polarity transients are absent or blocked by series components | Choose 1.5KE43A-E3/51 only if system topology guarantees unidirectional surge exposure and polarity alignment is assured. |
Compared with SMBJ43CA and 1.5KE43A-E3/51, the 1.5KE43CA-E3/51 uniquely delivers through-hole mountability, 1500 W surge capacity, and true bidirectional symmetry - making it optimal for high-reliability, high-energy, polarity-agnostic protection in power entry and industrial backplanes.
Availability
1.5KE43CA-E3/51 is available at Aetrix Electronics and suitable for automotive ECU power inputs, industrial sensor signal conditioning, telecom line cards, and consumer AC-DC adapters requiring stable component supply and full traceability.
Supply support for 1.5KE43CA-E3/51 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, MOSFETs, and protection devices with emphasis on reliability, ruggedness, and automotive qualification.
The 1.5KE family was engineered for high-energy transient suppression in harsh environments - targeting applications where robustness, repeatable clamping, and wide temperature operation outweigh compactness or ultra-low capacitance.
FAQ
What is the breakdown voltage tolerance for 1.5KE43CA-E3/51?
The 1.5KE43CA-E3/51 has a specified breakdown voltage range of 40.9 V to 45.2 V at 1.0 mA test current, yielding ±5.2% tolerance about 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-E3/51.
Is 1.5KE43CA-E3/51 RoHS compliant and lead-free?
Yes, the 1.5KE43CA-E3/51 carries the "E3" suffix, indicating full RoHS compliance per Directive 2011/65/EU and JESD 201 Class 1A whisker resistance. Its matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability standards, and the epoxy body satisfies UL 94 V-0 flammability requirements - all confirmed in Vishay document 88301 revision 09-Aug-2022.
Does 1.5KE43CA-E3/51 require a heatsink for 1500 W surge handling?
No external heatsink is required for single-event 1500 W surges (10/1000 µs), as energy dissipation occurs too rapidly for significant thermal accumulation. However, the 1.5KE43CA-E3/51's RθJA = 75 °C/W and RθJL = 15.4 °C/W mean repetitive surges or elevated ambient temperatures demand adequate PCB copper area and lead length optimization to avoid exceeding TJ = 175 °C.
How does the clamping voltage of 1.5KE43CA-E3/51 compare to its breakdown voltage?
The 1.5KE43CA-E3/51 clamps at 59.3 V when subjected to its rated peak pulse current of 25.3 A - a 37.7% overvoltage above the upper VBR limit (45.2 V). This ΔV = 14.1 V headroom defines the worst-case stress imposed on protected circuitry and must be validated against the absolute maximum ratings of downstream components in any design using the 1.5KE43CA-E3/51.
Can 1.5KE43CA-E3/51 be used in AC line applications?
Yes - the bidirectional nature of the 1.5KE43CA-E3/51 makes it suitable for AC line protection, including across-L/N, L–G, or N–G placements in 120/230 VAC systems. Its 36.8 V stand-off voltage ensures minimal leakage during normal AC cycles, while its 1500 W rating handles standardized surge waveforms like IEC 61000-4-5 combination wave (1.2/50 µs voltage, 8/20 µs current) when coordinated with appropriate series impedance.
1.5KE43CA-E3/51 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:
- -
- 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-E3/51 FAQ
1.How can I place an order for 1.5KE43CA-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE43CA-E3/51 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 1.5KE43CA-E3/51 reliable?
The price and inventory of 1.5KE43CA-E3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE43CA-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE43CA-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE43CA-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE43CA-E3/51?
1.5KE43CA-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE43CA-E3/51 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 1.5KE43CA-E3/51?
For technical support, including 1.5KE43CA-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE43CA-E3/51 requirements.
6.How does Aetrix verify that 1.5KE43CA-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE43CA-E3/51 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 1.5KE43CA-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE43CA-E3/51?
All 1.5KE43CA-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE43CA-E3/51, 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 1.5KE43CA-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE43CA-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE43CA-E3/51 Tags
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