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Vishay General Semiconductor - Diodes Division 1.5KE43CA-E3/54
- Part No.:
- 1.5KE43CA-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE43CA-E3/54.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:5,341
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Product details
Overview
1.5KE43CA-E3/54 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 standoff voltage (VWM), clamps to ≤59.3 V at 25.3 A peak pulse current, and delivers 1500 W peak pulse power with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces against lightning-induced transients and inductive switching surges.
For engineers reviewing the 1.5KE43CA-E3/54 datasheet, 1.5KE43CA-E3/54 pinout, 1.5KE43CA-E3/54 application, or 1.5KE43CA-E3/54 equivalent, this device is selected for high-energy transient suppression where bidirectional clamping, fast sub-nanosecond response, low clamping ratio, and AEC-Q101-qualified variants are critical - especially in automotive powertrain sensors, industrial PLC I/O modules, and telecom line interface protection.
Technical Context
This TVS operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable VBR tolerance (±5%), low leakage (<1.0 µA at VWM), and thermal stability up to +175 °C junction temperature.
The device uses a standardized DO-201AD (Case Style 1.5KE) package with axial leads, optimized for through-hole mounting and high surge current handling. Its clamping behavior follows a well-defined incremental voltage curve (ΔVC = VC − VBR) with low dynamic impedance, ensuring predictable voltage limiting during 8/20 µs or 10/1000 µs transients.
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 under controlled test conditions |
| VWM | 36.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | ≤59.3 V at 25.3 A - clamped voltage during 1500 W transient, determining protected circuit's worst-case overvoltage |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform, defining single-event surge capability |
| IPPM | 25.3 A - peak pulse current corresponding to VC, used to size PCB trace width and fuse coordination |
| TJ max. | +175 °C - maximum junction temperature enabling operation in under-hood automotive or industrial environments |
| Package | DO-201AD (Case Style 1.5KE) - industry-standard axial-leaded package with 0.375" lead length, UL 94 V-0 rated epoxy body |
Pinout & Package
1.5KE43CA-E3/54 uses a two-terminal DO-201AD package with no polarity marking - consistent with bidirectional function. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and qualified to JESD 201 Class 1A whisker test (E3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient conduction path | No functional distinction between terminals; either lead connects to protected node or ground - enables placement flexibility on AC or floating lines |
| Leads (axial) | Thermal and current path | 0.375" (9.5 mm) lead length supports mechanical strain relief and heat dissipation into PCB copper; RθJL = 15.4 °C/W enables high-reliability mounting |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures ±5% VBR tolerance and stable leakage performance across -55 °C to +175 °C operating range |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly laid out with low-inductance grounding |
| Sub-nanosecond response time | Clamps transients within <1 ns - faster than MOVs or GDTs - preserving signal integrity in high-speed interfaces |
| AEC-Q101 qualification option (HE3 suffix) | Validated for automotive powertrain and chassis applications requiring zero defects and extended temperature cycling |
| UL 94 V-0 molded epoxy case | Provides flame-retardant mechanical encapsulation suitable for safety-critical industrial and telecom equipment |
Applications
| Automotive Powertrain Sensors | Industrial PLC Analog Input Modules |
|---|---|
Use Scenario: Protecting crankshaft/camshaft position sensor signal lines from load dump and alternator ripple transients in 12 V systems. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across sensor output and ground to limit voltage excursions to safe levels during ESD or ISO 7637-2 pulses. Use Value: Maintains signal fidelity below 59.3 V clamping voltage while surviving repetitive 1500 W surges - eliminating sensor latch-up or ADC saturation. | Use Scenario: Shielding 4–20 mA current loop inputs from field-induced surges in factory automation cabinets exposed to motor drive noise. IC Role / Device Role / Timing Role: Primary overvoltage clamp on loop input terminals, coordinated with series current-limiting resistor and secondary filtering. Use Value: Prevents damage to precision op-amps and isolators by clamping transients before they exceed absolute maximum ratings - validated per IEC 61000-4-4/5. |
| Telecom Line Interface Protection | Consumer Appliance Motor Control Boards |
Use Scenario: Safeguarding Ethernet PHY or RS-485 transceivers connected to outdoor cabling susceptible to lightning-induced surges. IC Role / Device Role / Timing Role: First-stage TVS on differential pair, placed before common-mode chokes and secondary protection devices. Use Value: Absorbs >90% of 10/1000 µs surge energy with minimal capacitive loading (typ. <100 pF), preserving signal rise time and jitter performance. | Use Scenario: Protecting microcontroller GPIOs and gate drivers on washing machine motor control boards from back-EMF spikes during brushless DC motor commutation. IC Role / Device Role / Timing Role: Localized clamp across motor driver supply rails and logic-level signal lines to suppress inductive kickback. Use Value: Enables reliable operation at 175 °C ambient with no derating required - critical for sealed, thermally constrained appliance enclosures. |
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 | Lower 600 W PPPM, SMC package (surface-mount), higher VC/VBR ratio (1.38 vs. 1.37) | Better suited for space-constrained PCBs but requires layout optimization for thermal dissipation | Select SMBJ43CA only if board area is limited and peak surge energy is ≤600 W; verify thermal pad design per JEDEC Std. 51-3 |
| 1.5SMC43CA | Same 1500 W rating, SMC package, identical VBR/VC specs, RoHS-compliant with matte tin leads | Drop-in replacement for surface-mount assembly; lacks axial lead mechanical robustness for high-vibration environments | Choose 1.5SMC43CA for automated SMT production where vibration resistance is not primary; confirm reflow profile compatibility with E3 plating |
Compared with 1.5KE43CA-E3/54, SMBJ43CA offers smaller footprint but reduced surge capacity, while 1.5SMC43CA matches power and clamping performance in SMT form - making the original preferred for through-hole reliability in harsh environments and legacy designs.
Availability
1.5KE43CA-E3/54 is available at Aetrix Electronics and suitable for automotive powertrain sensors, industrial PLC analog input modules, telecom line interface protection, and consumer appliance motor control boards requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE43CA-E3/54 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, TVS devices, and optoelectronics with emphasis on reliability, ruggedness, and AEC-Q qualification.
The 1.5KE family was engineered for high-energy transient suppression in demanding environments - targeting automotive, industrial, and telecom applications where failure modes must be mitigated without compromising signal integrity or thermal margin.
FAQ
What is the breakdown voltage range of the 1.5KE43CA-E3/54?
The 1.5KE43CA-E3/54 has a guaranteed breakdown voltage (VBR) range of 40.9 V to 45.2 V at a test current of 1.0 mA, measured per JEDEC standard. This tight ±5% tolerance ensures consistent clamping onset across production lots and temperature extremes from -55 °C to +175 °C. The value is confirmed in Vishay's official datasheet document 88301, revision 09-Aug-2022, and applies specifically to the CA (bidirectional) variant of the 1.5KE43 part number.
Is the 1.5KE43CA-E3/54 suitable for automotive applications?
Yes, the 1.5KE43CA-E3/54 is suitable for automotive applications when specified with the HE3 suffix (e.g., 1.5KE43CAHE3_B), which denotes AEC-Q101 qualification. While the E3/54 variant itself is commercial-grade, its underlying design - including glass-passivated junction, 175 °C TJ max, and robust surge capability - meets core requirements for under-hood and chassis-mounted electronics. Engineers should select the HE3 version for production automotive use and verify qualification status via Vishay's official part numbering matrix.
What does the "CA" suffix mean in 1.5KE43CA-E3/54?
The "CA" suffix in 1.5KE43CA-E3/54 explicitly denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both forward and reverse directions. Unlike unidirectional "A" variants, the CA type has no cathode marking and is used where polarity is undefined or alternating, such as across AC signal lines, transformer windings, or differential bus pairs. This is defined in Vishay's 1.5KE datasheet section "DEVICES FOR BIDIRECTION APPLICATIONS" and applies strictly to the 1.5KE6.8CA through 1.5KE220CA series.
How does the clamping voltage of 1.5KE43CA-E3/54 compare to its standoff voltage?
The 1.5KE43CA-E3/54 has a maximum standoff voltage (VWM) of 36.8 V and a maximum clamping voltage (VC) of 59.3 V at 25.3 A - yielding a clamping ratio of ~1.61. This ratio indicates how tightly the device limits overvoltage relative to its operating threshold; a lower ratio signifies superior protection. The 1.61 value is competitive within the 1500 W TVS class and ensures protected ICs remain within safe absolute maximum ratings during surge events, as verified in Figure 7 of Vishay document 88301.
What packaging format is used for the 1.5KE43CA-E3/54?
The 1.5KE43CA-E3/54 is supplied in 13" diameter paper tape and reel packaging, with a base quantity of 1400 units per reel and a unit weight of 0.968 g. The "/54" in the part number refers to the preferred package code per Vishay's ordering information table, confirming tape-and-reel delivery. This format supports automated through-hole insertion and is compatible with standard reel-fed placement equipment used in high-volume manufacturing.
1.5KE43CA-E3/54 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:
- 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):
- 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-E3/54 FAQ
1.How can I place an order for 1.5KE43CA-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE43CA-E3/54 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-E3/54 reliable?
The price and inventory of 1.5KE43CA-E3/54 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-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE43CA-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE43CA-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE43CA-E3/54?
1.5KE43CA-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE43CA-E3/54 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-E3/54?
For technical support, including 1.5KE43CA-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE43CA-E3/54 requirements.
6.How does Aetrix verify that 1.5KE43CA-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE43CA-E3/54 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-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE43CA-E3/54?
All 1.5KE43CA-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE43CA-E3/54, 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-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE43CA-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE43CA-E3/54 Tags
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