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Taiwan Semiconductor Corporation 1.5KE43C
- Part No.:
- 1.5KE43C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE43C.pdf
- Description:
- 1500W, 43V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:3,656
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Product details
Overview
1.5KE43C from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 43V, working stand-off voltage 34.8V, clamping voltage 61.9V at 25A peak pulse current, and junction temperature rating up to +175°C. It protects automotive power rails and industrial control inputs against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE43C datasheet, 1.5KE43C pinout, 1.5KE43C application, or 1.5KE43C equivalent, this page delivers verified electrical parameters, mechanical package details, real-world protection use cases, and validated alternative parts for ESD and surge immunity design.
Technical Context
The 1.5KE43C operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 38.7–47.3V breakdown range (tested at 1mA), clamping transient energy within 1ps response time. Its low dynamic impedance ensures stable clamping under fast-rising surges such as inductive load switching.
Designed for high-reliability environments, it meets AEC-Q101 qualification (when ordered with 'H' suffix), supports 200A non-repetitive forward surge current, and maintains <1μA leakage above 10V - critical for low-power standby circuits in automotive ECUs and industrial PLCs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1mA | 38.7–47.3V: Confirmed breakdown range ensures reliable turn-on before system-level overvoltage damage occurs. |
| VWM | 34.8V: Maximum continuous reverse operating voltage - sets safe margin below VBR for normal operation. |
| VC @ IPP = 25A | 61.9V: Clamped voltage during 10/1000μs surge - defines maximum stress seen by downstream ICs. |
| PPK | 1500W: Peak pulse power rating - quantifies single-event surge energy absorption capability. |
| Junction Temp (TJ) | −55°C to +175°C: Extended thermal range enables deployment in engine bay or industrial motor drive enclosures. |
| Leakage (ID @ VWM) | <1μA: Ultra-low blocking leakage preserves battery life in always-on automotive modules. |
| Response Time | <1.0ps: Sub-picosecond turn-on guarantees suppression before transient edge propagates into protected circuitry. |
Pinout & Package
Package: DO-201 axial leaded plastic package with cathode band marking; RoHS-compliant, halogen-free molding compound; UL 94V-0 rated; pure tin-plated leads solderable per J-STD-002; weight ≈0.090g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or low-side return path; carries full surge current during clamping. |
| Cathode | Reverse-biased avalanche terminal | Connected to protected line (e.g., 12V rail); initiates clamping when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option | Available with 'H' suffix (e.g., 1.5KE43CH) - validated for automotive under-hood reliability requirements. |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (ESD coupling) - directly applicable to vehicle ECU protection. |
| Low dynamic impedance | Enables tight clamping window (VC − VBR = ~23V) - minimizes overvoltage overshoot during surge events. |
| 10/1000μs waveform rating | 1500W surge capacity defined per industry-standard lightning/surge test waveform - aligns with IEC 61000-4-5 Level 4 testing. |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive - supports green manufacturing and end-of-life recycling. |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: 12V battery line in engine control unit exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp transients before they reach MCU power pins. Use Value: Limits peak voltage to 61.9V during 10/1000μs surge, preventing latch-up or oxide breakdown in 3.3V/5V logic supply regulators. |
Use Scenario: 24V digital input channel on programmable logic controller receiving signals from field sensors. IC Role / Device Role / Timing Role: Standoff protector on input trace, absorbing EFT bursts per IEC 61000-4-4. Use Value: Sub-1ps response ensures clamping begins before 5ns EFT edge reaches optocoupler input, preserving signal integrity. |
| LED Driver Overvoltage Clamp | Motor Drive Gate Driver Protection |
Use Scenario: Constant-current LED driver board subjected to hot-swap and cable discharge events. IC Role / Device Role / Timing Role: Parallel-connected TVS across output terminals to absorb inductive kickback and ESD. Use Value: 34.8V VWM allows normal 32V LED string operation while clamping >43V transients to 61.9V - avoids false shutdown. |
Use Scenario: High-side gate driver IC in BLDC inverter exposed to shoot-through-induced voltage spikes. IC Role / Device Role / Timing Role: TVS across gate-source terminals of MOSFET driver to limit VGS overstress. Use Value: 61.9V clamping voltage stays well below typical 20V absolute max VGS, preventing gate oxide rupture during fast dv/dt events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ43A | DO-214AC (SMA) package; 43V VBR min/max tighter (38.8–47.5V); 64.5V VC @ 23.2A; 400W PPK. | Lower power rating limits use to sub-1kW surge environments; smaller footprint suits space-constrained PCBs. | Select when board area is constrained and surge energy is ≤400W; verify thermal derating for ambient >75°C. |
| ON Semiconductor 1N6286 | Same DO-201 package; identical VBR (38.7–47.3V), VWM (34.8V), VC (61.9V), and PPK (1500W); JEDEC-registered part number. | No functional difference - direct second-source replacement with same test conditions and qualification level. | Choose for dual-sourcing strategy without layout or thermal redesign; fully interchangeable in AEC-Q101 designs when 1N6286H is specified. |
Compared with 1.5KE43C, SMAJ43A offers compact packaging but sacrifices 73% surge power handling, while 1N6286 matches all key ratings and DO-201 form factor - making it a true second-source alternative for high-energy automotive and industrial surge protection.
Availability
1.5KE43C is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC input conditioning, LED driver overvoltage clamp, and motor drive gate driver safeguarding requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE43C 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and power devices since 1979.
The 1.5KE series was developed specifically for high-energy transient suppression in automotive and industrial systems, emphasizing AEC-Q101 reliability, ISO 7637-2 compliance, and robust DO-201 packaging for harsh-environment deployment.
FAQ
What is the polarity configuration of the 1.5KE43C?
The 1.5KE43C is a unidirectional TVS diode, with cathode marked by a band on the DO-201 body. It conducts only in reverse bias above its breakdown voltage (38.7–47.3V), providing clamping protection on positive-going transients relative to ground. This configuration is standard for DC power rail protection where polarity is fixed.
Does the 1.5KE43C meet AEC-Q101 qualification?
The base 1.5KE43C is not AEC-Q101 qualified; however, the variant 1.5KE43CH (with 'H' suffix) is explicitly AEC-Q101 qualified per the ordering information in the datasheet. Engineers requiring automotive-grade reliability must specify the 'H' version - the 'C' suffix denotes standard commercial grade with same electrical specs but no automotive qualification testing.
What is the maximum clamping voltage of the 1.5KE43C under surge conditions?
The 1.5KE43C has a maximum clamping voltage (VC) of 61.9V at 25A peak pulse current (IPP) under the standard 10/1000μs waveform. This value is guaranteed across temperature and process variation and defines the upper voltage limit imposed on protected circuitry during a full-rated 1500W transient event.
How does the 1.5KE43C compare to bidirectional TVS diodes like 1.5KE43CA?
The 1.5KE43C is unidirectional and intended for DC line protection with defined polarity; the 1.5KE43CA is bidirectional, offering symmetric clamping for AC lines or polarity-agnostic interfaces. Their VBR, VC, and PPK are identical, but 1.5KE43CA has no anode/cathode distinction and clamps equally on both polarities - making it unsuitable as a drop-in replacement for 1.5KE43C in DC applications without circuit review.
What is the thermal derating behavior of the 1.5KE43C above 25°C ambient?
The 1.5KE43C's peak pulse power (1500W) is rated at TA = 25°C and must be linearly derated above that temperature per Figure 2 in the datasheet. At 75°C ambient, it retains ~70% of rated power (~1050W); at 125°C, ~40% (~600W). Derating applies to non-repetitive pulses and assumes no heatsink - mounting on ≥16mm×16mm copper pad improves thermal performance.
1.5KE43C 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):
- 34.8V
- Voltage - Breakdown (Min):
- 38.7V
- Voltage - Clamping (Max) @ Ipp:
- 61.9V
- Current - Peak Pulse (10/1000µs):
- 25A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE43C FAQ
1.How can I place an order for 1.5KE43C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE43C 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 1.5KE43C reliable?
The price and inventory of 1.5KE43C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE43C is usually 5 days.
3.What payment methods are accepted for 1.5KE43C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE43C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE43C?
1.5KE43C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE43C 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 1.5KE43C?
For technical support, including 1.5KE43C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE43C requirements.
6.How does Aetrix verify that 1.5KE43C is sourced from the original manufacturer or authorized distributors?
All 1.5KE43C 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 1.5KE43C meets industry standards.
7.What is the process for return or replacement of 1.5KE43C?
All 1.5KE43C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE43C, 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 1.5KE43C part is unused and in its original packaging.
Return procedure for 1.5KE43C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE43C Tags
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