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Taiwan Semiconductor Corporation 1.5KE43CA
- Part No.:
- 1.5KE43CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE43CA.pdf
- Description:
- TVS 1500W 43.1V 5% BIDIR DO-201
- Quantity:
- Payment:
- Shipping:
Inventory:4,868
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Product details
Overview
1.5KE43CA from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 43V, working stand-off voltage 34.8V, clamping voltage 59.3V at 26A peak impulse current, and fast response time <5.0ns - deployed for ESD and load-dump protection in automotive power electronics and industrial control interfaces.
For engineers reviewing the 1.5KE43CA datasheet, 1.5KE43CA pinout, 1.5KE43CA application, or 1.5KE43CA equivalent, this page delivers verified electrical parameters, polarity marking guidance, ISO 7637-2 compliance status, thermal derating behavior, and AEC-Q101 qualification context specific to the CA-suffix bidirectional variant.
Technical Context
The 1.5KE43CA operates as a bidirectional avalanche diode, symmetrically clamping transients above ±40.9V (min VBR) and below ±34.8V (max VWM). Its junction temperature range spans –55°C to +175°C, and it meets ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity requirements for automotive electronics.
It delivers 1500W non-repetitive peak pulse power at 10/1000μs waveform, with dynamic impedance low enough to sustain clamping voltage ≤59.3V at 26A IPP, and leakage current <1μA at rated VWM, enabling robust protection without system loading during normal operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9V / 45.2V - defines reliable conduction onset in both directions under 1mA test current |
| VWM | 34.8V - maximum continuous reverse operating voltage before leakage exceeds 1μA |
| VC@IPP | 59.3V @ 26A - clamped voltage during worst-case 10/1000μs surge, limiting downstream stress |
| PPK | 1500W - peak transient power handling capability per single non-repetitive event |
| TJ max | +175°C - maximum junction temperature enabling use in under-hood automotive environments |
| Response time | <5.0ns - enables suppression of fast EFT and ESD events before sensitive ICs are damaged |
| Package | DO-201 - industry-standard axial-leaded package with UL 94V-0 molding and tin-plated leads |
Pinout & Package
DO-201 package: axial-leaded, cylindrical epoxy body with cathode band marking for unidirectional variants; for 1.5KE43CA (bidirectional), polarity is non-directional - terminals are interchangeable, marked only for mechanical orientation (cathode band absent or unused).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | No functional polarity - either lead serves as input/output for transient clamping in AC or floating DC paths |
| Leads (Tin-plated) | Thermal and electrical interface | Solderable per J-STD-002; supports 5W steady-state dissipation on 16mm×16mm copper pad |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| ISO 7637-2 compliance | Passes Pulse 1 (inductive load dump), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (switching transients) |
| Low dynamic impedance | Enables tight clamping window (VC − VBR = ~18.4V), minimizing overvoltage exposure to protected ICs |
| Halogen-free construction | Meets IEC 61249-2-21, supporting RoHS-compliant and environmentally restricted manufacturing |
| Fast response <5.0ns | Clamps ESD and EFT events before propagation into microcontroller I/O or CAN transceiver pins |
Applications
| Automotive Power Distribution | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 12V/24V power rails in body control modules against load dump and jump-start surges. IC Role / Device Role / Timing Role: Bidirectional TVS placed across supply rail to clamp positive and negative transients simultaneously. Use Value: Limits rail voltage to ≤59.3V during 26A ISO 7637-2 Pulse 1 events, preventing damage to LDOs and MCU power domains. | Use Scenario: Shielding analog sensor inputs (e.g., RTD, thermocouple amplifiers) from EFT coupling on long cables. IC Role / Device Role / Timing Role: Low-capacitance TVS shunting transient energy before it reaches precision op-amp inputs. Use Value: Sub-5ns response ensures clamping occurs prior to signal path propagation, preserving measurement integrity. |
| LED Driver Protection | RS-485 Transceiver Port |
Use Scenario: Safeguarding constant-current LED drivers from inductive kickback when switching high-side MOSFETs. IC Role / Device Role / Timing Role: TVS connected across driver output to absorb reverse EMF spikes during turn-off. Use Value: 1500W surge rating handles repetitive 10/1000μs spikes without degradation, extending driver lifetime. | Use Scenario: Guarding RS-485 bus lines (A/B) against lightning-induced surges and ground potential differences. IC Role / Device Role / Timing Role: Bidirectional TVS placed differentially between A and B lines to suppress common-mode transients. Use Value: Symmetric VBR (±40.9–45.2V) matches RS-485 common-mode range, avoiding false triggering during normal signaling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ43CA | Same DO-214AC (SMA) package; lower PPK (400W); VC = 69.4V @ 5.8A | Lower surge capacity suits consumer-grade 12V systems, not automotive load dump | Select when space-constrained layout favors surface-mount and surge demands are ≤400W |
| ON Semiconductor 1.5SMC43CA | DO-214AB (SMC) package; identical 1500W rating; VC = 69.4V @ 21.7A | Higher clamping voltage reduces protection margin for 3.3V/5V logic interfaces | Choose when existing SMC footprint is fixed and AEC-Q101 is not required |
Compared with SMAJ43CA and 1.5SMC43CA, the 1.5KE43CA offers superior clamping performance (59.3V vs ≥69.4V) and axial DO-201 mounting suited for high-reliability through-hole power rails - critical where low VC and mechanical robustness outweigh SMT density needs.
Availability
1.5KE43CA is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, LED driver protection, and RS-485 transceiver ports requiring stable component supply across extended temperature and surge conditions.
Supply support for 1.5KE43CA 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and thyristors - headquartered in Hsinchu, Taiwan.
The 1.5KE series was designed specifically for high-energy transient suppression in automotive and industrial environments, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust DO-201 packaging for under-hood and factory-floor resilience.
FAQ
What does the 'CA' suffix indicate in 1.5KE43CA?
The 'CA' suffix in 1.5KE43CA denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities, with identical breakdown and clamping characteristics for positive and negative surges. This distinguishes it from unidirectional 'C' variants and confirms its suitability for AC-coupled or floating DC applications where polarity reversal may occur. The 1.5KE43CA achieves this via a back-to-back diode structure inside the DO-201 package.
Is 1.5KE43CA AEC-Q101 qualified?
Yes, the 1.5KE43CA is AEC-Q101 qualified - confirmed by Taiwan Semiconductor's official documentation and ordering code suffix 'H' (e.g., 1.5KE43CAH). This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD robustness, validating its use in automotive powertrain and chassis modules. The base 1.5KE43CA part meets all electrical specs but requires the 'H' suffix for formal AEC-Q101 certification.
What is the maximum clamping voltage of 1.5KE43CA and at what current is it specified?
The maximum clamping voltage (VC) of the 1.5KE43CA is 59.3V, measured at a peak impulse current (IPP) of 26A under the standard 10/1000μs double-exponential waveform. This value is guaranteed across the full operating temperature range and reflects worst-case performance after device aging - ensuring downstream circuitry remains within safe voltage limits even during severe transients. The 1.5KE43CA maintains this clamping performance consistently due to low dynamic impedance.
How does 1.5KE43CA compare to unidirectional 1.5KE43C in terms of application flexibility?
The 1.5KE43CA offers broader application flexibility than the unidirectional 1.5KE43C because it protects against transients of either polarity without requiring correct orientation during assembly - eliminating risk of reverse installation in differential or AC-linked circuits. While 1.5KE43C is limited to DC rails with defined anode/cathode placement, the 1.5KE43CA supports RS-485 bus lines, transformer-coupled interfaces, and dual-supply sensors where voltage reversals occur. Both share identical VBR, VWM, and PPK ratings.
What thermal derating applies to 1.5KE43CA above 25°C ambient?
The 1.5KE43CA follows a linear thermal derating curve: peak pulse power decreases from 1500W at 25°C ambient to zero at 175°C junction temperature. Per Figure 2 in the datasheet, at 75°C ambient, the device retains ~80% of rated power (~1200W) when mounted on a 16mm×16mm copper pad; without heatsinking, derating is steeper. This behavior directly impacts sustained surge handling in engine bay or industrial enclosures - design margins must account for actual board-level thermal resistance to ensure 1.5KE43CA stays within its 175°C TJ limit.
1.5KE43CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- 1.5KE
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE43CA FAQ
1.How can I place an order for 1.5KE43CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE43CA 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 reliable?
The price and inventory of 1.5KE43CA 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 is usually 5 days.
3.What payment methods are accepted for 1.5KE43CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE43CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE43CA?
1.5KE43CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE43CA 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?
For technical support, including 1.5KE43CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE43CA requirements.
6.How does Aetrix verify that 1.5KE43CA is sourced from the original manufacturer or authorized distributors?
All 1.5KE43CA 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 meets industry standards.
7.What is the process for return or replacement of 1.5KE43CA?
All 1.5KE43CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE43CA, 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 part is unused and in its original packaging.
Return procedure for 1.5KE43CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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