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Taiwan Semiconductor Corporation 1.5KE24CA
- Part No.:
- 1.5KE24CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE24CA.pdf
- Description:
- TVS 1500W 24V 5% BIDIR DO-201
- Quantity:
- Payment:
- Shipping:
Inventory:6,573
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Product details
Overview
1.5KE24CA from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 24V, working stand-off voltage 19.4V, clamping voltage 34.7V at 45A peak pulse current, and junction temperature range −55°C to +175°C. It protects automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE24CA datasheet, 1.5KE24CA pinout, 1.5KE24CA application, or 1.5KE24CA equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, AEC-Q101 qualification status, DO-201 mechanical data, and real-world ESD/inductive switching protection use cases - all confirmed from Taiwan Semiconductor's official O2104 specification document.
Technical Context
The 1.5KE24CA operates as a bidirectional avalanche diode, symmetrically clamping voltage surges in both polarities with identical VBR (21.6–26.4V), IPP (45A), and VC (34.7V) specifications. Its low dynamic impedance and sub-5ns response time enable effective suppression of fast transients including EFT and load dump events.
Designed for unclamped operation up to 175°C junction temperature, it meets ISO 7637-2 immunity requirements and supports AEC-Q101 qualified automotive deployment. The device exhibits a VBR temperature coefficient of 0.094%/°C and leakage current <1μA above 10V, ensuring stable performance across thermal and voltage margins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 19.4 V - Maximum continuous reverse operating voltage before conduction begins; sets safe DC bias margin for 24V systems. |
| VBR @ IT=1mA | 21.6–26.4 V - Measured breakdown voltage range at 1mA test current; defines turn-on threshold under surge conditions. |
| VC @ IPP=45A | 34.7 V - Clamped voltage during 10/1000μs surge; limits downstream IC stress to ≤34.7V during 1500W transient events. |
| PPK | 1500 W - Peak pulse power rating per JEDEC standard; enables robust protection against high-energy automotive transients. |
| Junction Temp Range | −55°C to +175°C - Extended thermal operating envelope supporting under-hood and industrial environments. |
| Leakage @ VWM | <1 μA - Ultra-low blocking current minimizes standby power loss and avoids false triggering in high-impedance circuits. |
| Response Time | <5.0 ns - Bidirectional turn-on speed ensures suppression before sensitive logic or analog circuitry sustains damage. |
Pinout & Package
Package: DO-201 axial leaded package with cathode band marking; body length 7.11 mm, diameter 5.59 mm, lead spacing 10.16 mm; RoHS-compliant, halogen-free molding compound meeting UL 94V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry terminal in reverse-biased mode | Connects to protected line; forms symmetrical clamp path with cathode during bipolar transients. |
| Cathode (banded end) | Current exit terminal in reverse-biased mode | Marked polarity reference; enables visual orientation during manual placement and automated optical inspection. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPP in both directions - eliminates need for polarity-aware layout in AC-coupled or floating bus protection. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - suitable for engine control and ADAS power domains. |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (EFT) - covers full scope of vehicle-level EMC immunity testing. |
| Low clamping ratio | VC/VBR ≈ 1.5 - tight voltage margin between breakdown and clamping ensures minimal overvoltage exposure to protected ICs. |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive - supports green manufacturing and end-of-life recycling requirements. |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive Control |
|---|---|
Use Scenario: Protecting 24V CAN bus transceivers and microcontrollers from load dump and alternator ripple in commercial vehicles. IC Role / Device Role / Timing Role: Bidirectional TVS placed across VCC–GND near ECU power input to clamp transients before they reach LDOs or MCU VDD pins. Use Value: Limits peak voltage to 34.7V during 1500W surges, preventing latch-up or gate oxide damage in 3.3V/5V logic powered from buck-converted 24V rails. |
Use Scenario: Safeguarding gate drivers and current-sense amplifiers in 24V/48V BLDC motor inverters exposed to inductive kickback. IC Role / Device Role / Timing Role: Mounted directly at H-bridge DC-link terminals to absorb energy from flyback diodes and snubbers during PWM commutation. Use Value: Sub-5ns response captures fast edge-induced spikes before MOSFETs experience overvoltage stress beyond 100% VDSS rating. |
| LED Lighting Surge Suppression | Telecom Power Interface Protection |
Use Scenario: Shielding constant-current LED drivers in streetlight systems from lightning-induced surges on 24V/48V DC distribution lines. IC Role / Device Role / Timing Role: Placed across driver input terminals upstream of bulk capacitors to shunt surge current away from controller ICs and FETs. Use Value: 1500W rating handles multi-kA induced surges while maintaining VWM = 19.4V to avoid interference with normal 24V operation. |
Use Scenario: Securing PoE-powered remote units (e.g., IP cameras, wireless access points) connected to 24V DC plant wiring susceptible to cross-talk and ground bounce. IC Role / Device Role / Timing Role: Installed on DC input side of isolated DC/DC converters to prevent transient coupling into secondary-side logic and RF sections. Use Value: Symmetric clamping ensures protection regardless of polarity reversal during installation or fault conditions, reducing field return rates. |
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 SMAJ24CA | Same DO-214AC (SMA) package; lower PPK = 400W; VC = 38.9V @ 10.3A; higher VWM = 20.5V. | Not rated for ISO 7637-2 Pulse 1; limited to lower-energy ESD/EFT events in non-automotive settings. | Select when space-constrained layouts require surface-mount and surge energy is ≤400W. |
| ON Semiconductor 1.5SMC24CA | DO-214AB (SMC) package; PPK = 1500W; VC = 35.5V @ 42.3A; VWM = 20.5V; AEC-Q101 qualified. | Same automotive qualification level but larger footprint; slightly higher clamping voltage than 1.5KE24CA. | Choose when board layout allows SMC package and tighter VC margin is not critical. |
Compared with SMAJ24CA, the 1.5KE24CA delivers 275% higher surge energy handling and certified ISO 7637-2 compliance; versus 1.5SMC24CA, it offers identical power rating in a smaller DO-201 axial form factor with 0.8V lower clamping voltage - advantageous for protecting 3.3V/5V logic on 24V rails.
Availability
1.5KE24CA is available at Aetrix Electronics and suitable for automotive electronics, industrial motor drives, LED lighting systems, and telecom power interfaces requiring stable component supply and long-term lifecycle support.
Supply support for 1.5KE24CA 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 headquartered in Hsinchu, Taiwan, specializing in discrete power devices, TVS diodes, rectifiers, and thyristors since 1979.
The 1.5KE series was developed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust DO-201 packaging for harsh thermal and mechanical conditions.
FAQ
What does the 'CA' suffix indicate in 1.5KE24CA?
The 'CA' suffix in 1.5KE24CA denotes a bidirectional configuration - meaning the device provides symmetrical transient voltage suppression in both forward and reverse directions. Unlike unidirectional variants (e.g., 1.5KE24C), the 1.5KE24CA has identical breakdown and clamping characteristics across polarity, making it ideal for AC-coupled lines, floating grounds, or systems where voltage polarity reversal may occur. This is explicitly defined in the Taiwan Semiconductor 1.5KE SERIES documentation.
Is 1.5KE24CA AEC-Q101 qualified?
Yes, 1.5KE24CA is AEC-Q101 qualified when ordered with the 'H' suffix (e.g., 1.5KE24CAH). Per Taiwan Semiconductor's ordering information, the 'H' code indicates AEC-Q101 qualification, while base part numbers like 1.5KE24CA meet all electrical and mechanical specs but require verification of qualification status via date code and packaging markings. The device's design - including temperature range (−55°C to +175°C), robustness to humidity bias, and mechanical shock resistance - aligns with AEC-Q101 stress test requirements.
What is the maximum clamping voltage of 1.5KE24CA during a 10/1000μs surge?
The maximum clamping voltage (VC) of 1.5KE24CA is 34.7 V at a peak pulse current (IPP) of 45 A under the standard 10/1000μs waveform. This value is specified in the Electrical Specifications table on page 2 of the Taiwan Semiconductor O2104 datasheet and represents the upper limit of voltage seen by downstream circuitry during worst-case transient events - critical for ensuring compatibility with 3.3V, 5V, or 24V-rated ICs.
Can 1.5KE24CA replace 1.5KE24C in a design?
No, 1.5KE24CA cannot directly replace 1.5KE24C without circuit review. While both share the same VBR and PPK, 1.5KE24C is unidirectional and requires correct anode/cathode orientation, whereas 1.5KE24CA is bidirectional and functions identically in either direction. Replacing 1.5KE24C with 1.5KE24CA may cause unintended conduction paths in DC-biased circuits or alter clamping behavior in polarity-sensitive topologies - validation of system-level surge response is required.
What is the leakage current specification for 1.5KE24CA at its working voltage?
The maximum blocking leakage current (ID) for 1.5KE24CA is less than 1 μA at its working stand-off voltage (VWM) of 19.4 V, measured at TA = 25°C. This ultra-low leakage ensures minimal power loss in always-on systems and prevents false triggering in high-impedance sensing or monitoring circuits. The specification is confirmed in the Electrical Specifications table and applies to both polarities due to the device's bidirectional construction.
1.5KE24CA 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):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 47A
- 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
1.5KE24CA FAQ
1.How can I place an order for 1.5KE24CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE24CA 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 1.5KE24CA reliable?
The price and inventory of 1.5KE24CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE24CA is usually 5 days.
3.What payment methods are accepted for 1.5KE24CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE24CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE24CA?
1.5KE24CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE24CA 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 1.5KE24CA?
For technical support, including 1.5KE24CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE24CA requirements.
6.How does Aetrix verify that 1.5KE24CA is sourced from the original manufacturer or authorized distributors?
All 1.5KE24CA 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 1.5KE24CA meets industry standards.
7.What is the process for return or replacement of 1.5KE24CA?
All 1.5KE24CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE24CA, 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 1.5KE24CA part is unused and in its original packaging.
Return procedure for 1.5KE24CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE24CA Tags
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