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Taiwan Semiconductor Corporation 1.5KE27CA
- Part No.:
- 1.5KE27CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE27CA.pdf
- Description:
- TVS 1500W 27.1V 5% BIDIR DO-201
- Quantity:
- Payment:
- Shipping:
Inventory:4,309
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Product details
Overview
1.5KE27CA from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 27V, working stand-off voltage 21.8V, clamping voltage 39.1V at 40A peak pulse current, and junction temperature range −55°C to +175°C - used for ESD and surge protection in automotive power rails and industrial control I/O interfaces.
For engineers reviewing the 1.5KE27CA datasheet, 1.5KE27CA pinout, 1.5KE27CA application, or 1.5KE27CA equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, ISO 7637-2 compliance, AEC-Q101 qualification status, and real-world design implications for transient immunity in 12V/24V systems.
Technical Context
The 1.5KE27CA operates as a bidirectional avalanche diode, symmetrically clamping transients above ±24.3V (min VBR) and below ±29.7V (max VBR) at 1mA test current, with low dynamic impedance enabling fast response (<5.0ns) to EFT and load-dump events. Its unidirectional counterpart (1.5KE27A) is not applicable here due to CA suffix indicating bipolar construction.
Designed per JEDEC DO-201 standards, it sustains 1500W peak pulse power (10/1000μs waveform), exhibits <1μA leakage at 21.8V, and maintains stable clamping up to 175°C junction temperature - making it suitable for under-hood automotive modules and industrial PLC analog input protection where thermal derating must be considered.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 24.3V / 29.7V - defines guaranteed clamping onset threshold in both directions; ensures protection starts before downstream IC damage thresholds. |
| VWM | 21.8V - maximum continuous reverse voltage the device blocks without significant leakage; sets safe operating margin below VBR. |
| VC@IPP | 39.1V @ 40A - peak clamped voltage during 10/1000μs surge; determines maximum stress seen by protected circuitry. |
| PPK | 1500W - peak pulse power handling capability; enables robust suppression of ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 2b (battery dump). |
| TJ max | +175°C - maximum junction temperature; supports operation in high-ambient environments like engine control units without thermal shutdown. |
| IR @ VWM | <1μA - ultra-low leakage at working voltage; avoids signal path loading in high-impedance sensor interfaces. |
Pinout & Package
Package: DO-201 axial lead package with cathode band marking (not functional for bidirectional 1.5KE27CA; terminals are symmetrical and non-polarized).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | Bidirectional terminal pair | Identical avalanche behavior in both directions; no polarity sensitivity - simplifies PCB layout and eliminates orientation errors during assembly. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS power domains per stress test requirements. |
| ISO 7637-2 compliant | Meets Pulse 1 (−150V/50Ω), Pulse 2a (+100V/2Ω), Pulse 2b (+100V/50Ω), Pulse 3a/b (±300V) immunity requirements. |
| Fast response time | <5.0ns turn-on - limits transient energy delivery to protected ICs before clamping engages. |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained designs. |
Applications
| Automotive Power Rail Protection | Industrial Analog Input Protection |
|---|---|
Use Scenario: Suppressing load-dump transients on 12V battery-fed ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power rail and ground to clamp ±100V pulses within 5ns. Use Value: Prevents latch-up or gate oxide rupture in MCU power management ICs by limiting rail voltage to ≤39.1V during ISO 7637-2 Pulse 2b events. | Use Scenario: Protecting 4–20mA current loop receiver inputs from ESD and field-wiring surges. IC Role / Device Role / Timing Role: Placed differential across input terminals to shunt common-mode transients before precision op-amps. Use Value: Maintains signal integrity by holding input node voltage within ±39.1V while drawing <1μA leakage at 21.8V working voltage. |
| LED Driver Overvoltage Clamp | Motor Control Board Surge Suppression |
Use Scenario: Safeguarding constant-current LED driver ICs against back-EMF spikes during hot-plug disconnect. IC Role / Device Role / Timing Role: Connected across driver output and return to clamp inductive kickback in both polarity directions. Use Value: Limits voltage excursion to 39.1V, preventing overvoltage failure of integrated MOSFETs rated for 40V drain-source breakdown. | Use Scenario: Shielding microcontroller GPIOs and gate drivers from commutation noise in BLDC motor inverters. IC Role / Device Role / Timing Role: Mounted at board edge connectors to divert fast-rising transients before entering logic-level circuitry. Use Value: Achieves <5ns response to 1kV EFT bursts, reducing risk of false triggering or reset in safety-critical motion control firmware. |
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 | 600W rating, SMA package (smaller footprint), VBR = 26.7–29.5V, VC = 38.9V @ 15.4A | Lower surge capacity; suited for space-constrained consumer-grade boards, not full AEC-Q101 automotive use. | Select when board area is limited and 600W peak power suffices; verify thermal performance in sealed enclosures. |
| ON Semiconductor 1.5SMC27CA | Same 1500W rating, SMC package (surface-mount), VBR = 24.3–29.7V, VC = 39.1V @ 40A, AEC-Q101 qualified | Surface-mount alternative requiring PCB rework; identical electrical specs but different thermal path and mounting method. | Choose for automated assembly lines preferring SMD over axial leads; requires thermal pad design per JEDEC Std. 51-3. |
Compared with Littelfuse SMAJ24CA and ON Semi 1.5SMC27CA, the 1.5KE27CA offers identical clamping performance and AEC-Q101 qualification in a through-hole DO-201 package - providing higher mechanical robustness for high-vibration environments and simplified prototyping without solder paste stencil requirements.
Availability
1.5KE27CA is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O protection, and LED lighting surge mitigation requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE27CA 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-energy transient suppression in automotive and industrial environments, emphasizing AEC-Q101 reliability, ISO 7637-2 compliance, and robust thermal performance in DO-201 packaging.
FAQ
What does the 'CA' suffix mean in 1.5KE27CA?
The 'CA' suffix in 1.5KE27CA denotes a bidirectional configuration - meaning the device provides symmetrical avalanche clamping in both forward and reverse directions. Unlike unidirectional variants (e.g., 1.5KE27A), the 1.5KE27CA has no cathode marking and functions identically regardless of voltage polarity applied across its terminals, making it ideal for AC-coupled or floating signal line protection.
Is 1.5KE27CA AEC-Q101 qualified?
Yes, the 1.5KE27CA is AEC-Q101 qualified when ordered with the 'H' suffix (e.g., 1.5KE27CAH). Standard 1.5KE27CA parts meet all electrical specifications but require verification of qualification status via Taiwan Semiconductor's official documentation or authorized distributor certificates - AEC-Q101 testing includes HTGB, AC-H3TRB, and mechanical shock per automotive reliability standards.
What is the maximum clamping voltage of 1.5KE27CA during a surge event?
The maximum clamping voltage (VC) of the 1.5KE27CA is 39.1V at a peak pulse current (IPP) of 40A under the standard 10/1000μs waveform. This value represents the highest voltage the protected circuit will experience during worst-case surge conditions, directly determining whether downstream components remain within their absolute maximum ratings.
Can 1.5KE27CA replace 1.5KE27A in a design?
No - the 1.5KE27CA is bidirectional while the 1.5KE27A is unidirectional with a defined cathode. Substituting 1.5KE27CA for 1.5KE27A may cause unintended conduction in DC-biased circuits or alter clamping behavior in polarized applications. Always validate circuit topology and bias conditions before interchanging CA and A suffix variants of the 1.5KE27CA.
Does 1.5KE27CA meet ISO 7637-2 requirements?
Yes, the 1.5KE27CA meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a (supply disconnection), Pulse 2b (load dump), and Pulses 3a/3b (capacitive coupling), as confirmed in Taiwan Semiconductor's official documentation. Its 1500W surge rating and sub-5ns response enable reliable suppression of these standardized automotive transients without external circuit modification.
1.5KE27CA 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):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 42A
- 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
1.5KE27CA FAQ
1.How can I place an order for 1.5KE27CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE27CA 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 1.5KE27CA reliable?
The price and inventory of 1.5KE27CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE27CA is usually 5 days.
3.What payment methods are accepted for 1.5KE27CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE27CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE27CA?
1.5KE27CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE27CA 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 1.5KE27CA?
For technical support, including 1.5KE27CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE27CA requirements.
6.How does Aetrix verify that 1.5KE27CA is sourced from the original manufacturer or authorized distributors?
All 1.5KE27CA 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 1.5KE27CA meets industry standards.
7.What is the process for return or replacement of 1.5KE27CA?
All 1.5KE27CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE27CA, 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 1.5KE27CA part is unused and in its original packaging.
Return procedure for 1.5KE27CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE27CA Tags
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