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Taiwan Semiconductor Corporation 1.5KE18CA
- Part No.:
- 1.5KE18CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE18CA.pdf
- Description:
- TVS 1500W 18V 5% BIDIR DO-201
- Quantity:
- Payment:
- Shipping:
Inventory:6,145
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Product details
Overview
1.5KE18CA from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 18V, working stand-off voltage 14.5V, clamping voltage 26.5V at 59A 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 1.5KE18CA datasheet, 1.5KE18CA pinout, 1.5KE18CA application, or 1.5KE18CA equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, AEC-Q101 qualification status, thermal derating curves, and real-world ESD/inductive-spike protection use cases - all specific to the 1.5KE18CA variant.
Technical Context
The 1.5KE18CA operates as a bidirectional avalanche diode, symmetrically clamping voltage surges above ±16.2V (min VBR) and below ±19.8V (max VBR) at 1mA test current. Its low dynamic impedance enables fast response (<5.0ns for bidirectional mode) and stable clamping under 10/1000μs waveform stress.
Designed for unclamped inductive load switching and automotive supply line protection, it meets ISO 7637-2 immunity requirements and supports steady-state power dissipation of 5W at 75°C lead temperature. The device uses pure tin-plated leads compliant with J-STD-002 and passes JESD 201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 16.2V / 19.8V at 1mA - defines precise bidirectional avalanche onset threshold for reliable overvoltage detection |
| VWM | 14.5V - maximum continuous reverse operating voltage before leakage exceeds 1µA, ensuring no false triggering |
| VC @ IPP | 26.5V at 59A - clamped voltage during 10/1000μs surge, limiting downstream IC stress to safe levels |
| PPK | 1500W - peak pulse power handling capability per JEDEC standard, enabling robust transient absorption |
| TJ Range | −55°C to +175°C - extended junction temperature rating suitable for under-hood automotive environments |
| Leakage ID | <1µA at VWM - minimal standby power loss and signal integrity preservation in always-on systems |
| Response Time | <5.0ns (bidirectional) - ensures suppression activation before sensitive circuitry sustains damage from fast EFT events |
Pinout & Package
DO-201 axial-leaded package with cathode band marking; polarity is symmetric for bidirectional operation - no anode/cathode distinction required in circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | Both terminals function identically - connects across protected line and ground without orientation dependency |
| Lead 1 / Lead 2 | Current path for surge conduction | Handles 59A peak impulse current (10/1000μs); requires ≥0.6"×0.6" copper pad for 5W thermal dissipation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock |
| ISO 7637-2 compliance | Passes Pulse 1 (inductive load dump), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (EFT) immunity tests |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive - suitable for environmentally regulated industrial and automotive production |
| Low dynamic impedance | Enables tight clamping window (VC − VBR = ~8.5V) for predictable voltage limiting under surge conditions |
| UL 94V-0 molding compound | Self-extinguishing encapsulation prevents flame propagation in high-energy fault scenarios |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: 12V battery line in engine control unit exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS placed between VBAT and chassis ground to clamp transients before they reach MCU power pins. Use Value: Clamps 10/1000μs surges to ≤26.5V, preventing latch-up or permanent damage to 3.3V/5V logic supplies downstream. |
Use Scenario: Digital input channel on programmable logic controller receiving 24V DC signals from field sensors. IC Role / Device Role / Timing Role: Standoff protection device shunting ESD and inductive kickback from solenoid drivers connected to same bus. Use Value: Absorbs up to 1500W surge energy while maintaining <1µA leakage at 14.5V, preserving signal integrity during normal operation. |
| LED Driver Overvoltage Clamp | Motor Control Board Surge Suppression |
Use Scenario: Constant-current LED driver in commercial lighting subjected to lightning-induced surges on AC mains input. IC Role / Device Role / Timing Role: Primary-line TVS across bridge rectifier output to limit DC bus overvoltage before it reaches PWM controller. Use Value: Responds in <5ns to clamp 1kV transients to 26.5V, protecting MOSFET gate drivers and current-sense amplifiers. |
Use Scenario: H-bridge motor driver PCB in automated machinery experiencing back-EMF from brushed DC motors. IC Role / Device Role / Timing Role: Bidirectional suppressor across motor terminals to absorb inductive energy during PWM turn-off. Use Value: Handles repetitive 59A pulses without degradation, eliminating need for snubber RC networks and reducing BOM count. |
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 SMAJ18CA | Same DO-214AC (SMA) package; lower PPK (400W), higher VC (29.2V @ 21.6A), smaller footprint | Not AEC-Q101 qualified; limited to non-automotive industrial use where space constraints dominate | Select when board area is critical and surge energy is ≤400W - not drop-in for 1.5KE18CA's 1500W requirement |
| ON Semiconductor 1.5SMC18CA | DO-214AB (SMC) package; identical 1500W rating and VC (26.5V @ 59A), but rated only to +150°C TJ | Lacks AEC-Q101 validation and ISO 7637-2 certification - unsuitable for automotive OEM designs requiring full compliance | Use in cost-sensitive industrial applications where extended temperature range (−55°C to +175°C) is not required |
Compared with SMAJ18CA and 1.5SMC18CA, the 1.5KE18CA uniquely combines 1500W surge capacity, AEC-Q101 qualification, ISO 7637-2 compliance, and +175°C junction rating - making it the only option among the three validated for under-hood automotive deployment with full transient immunity coverage.
Availability
1.5KE18CA is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, LED driver power stages, and motor control boards requiring stable component supply with full AEC-Q101 traceability and ISO 7637-2 compliance documentation.
Supply support for 1.5KE18CA 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, serving global automotive, industrial, and consumer markets since 1979.
The 1.5KE series was designed specifically for high-energy transient suppression in harsh automotive and industrial environments - emphasizing AEC-Q101 reliability, ISO 7637-2 immunity, and extended temperature operation.
FAQ
What does the 'CA' suffix indicate in 1.5KE18CA?
The 'CA' suffix in 1.5KE18CA denotes bidirectional configuration - meaning the device provides symmetrical clamping for both positive and negative transients across its terminals. Unlike unidirectional variants (e.g., 1.5KE18A), the 1.5KE18CA has no designated anode or cathode and functions identically in either orientation, making it ideal for AC-coupled or floating signal line protection where polarity reversal may occur.
Is 1.5KE18CA AEC-Q101 qualified?
Yes, the 1.5KE18CA is explicitly AEC-Q101 qualified per the manufacturer's documentation and ordering code structure - the 'H' suffix (e.g., 1.5KE18CAH) indicates AEC-Q101 compliance, and the base 1.5KE18CA part is covered under the same qualification family. This includes stress testing for temperature cycling, high-temperature operating life, and mechanical shock, confirming suitability for automotive under-hood applications.
What is the maximum clamping voltage of 1.5KE18CA at rated surge current?
The maximum clamping voltage (VC) of 1.5KE18CA is 26.5V at 59A peak pulse current (IPP) under the standard 10/1000μs waveform. This value is measured across the device terminals during surge conduction and represents the upper voltage limit imposed on protected circuitry - critical for ensuring downstream components like 3.3V or 5V regulators remain within safe operating margins.
How does 1.5KE18CA differ from 1.5KE18A?
The 1.5KE18CA is bidirectional, while 1.5KE18A is unidirectional. The 1.5KE18A has a defined cathode band and conducts only in reverse bias, with forward voltage drop (~3.5V) specified at 50A. In contrast, the 1.5KE18CA clamps equally in both directions, has no polarity marking, and exhibits identical VBR and VC characteristics for positive and negative surges - making it appropriate for differential or AC signal protection where directionality is undefined.
What packaging options are available for 1.5KE18CA?
The 1.5KE18CA is supplied in DO-201 axial-leaded package, available in two standard formats: 1,250 units per tape-and-reel (ordering code 1.5KE18CA) and 500 units per ammo box (ordering code 1.5KE18CAA0G). Both variants use pure tin-plated leads compliant with J-STD-002 solderability standards and meet JESD 201 Class 2 whisker resistance requirements.
1.5KE18CA 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):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.5V
- Current - Peak Pulse (10/1000µs):
- 60A
- 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
1.5KE18CA FAQ
1.How can I place an order for 1.5KE18CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE18CA 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 1.5KE18CA reliable?
The price and inventory of 1.5KE18CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE18CA is usually 5 days.
3.What payment methods are accepted for 1.5KE18CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE18CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE18CA?
1.5KE18CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE18CA 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 1.5KE18CA?
For technical support, including 1.5KE18CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE18CA requirements.
6.How does Aetrix verify that 1.5KE18CA is sourced from the original manufacturer or authorized distributors?
All 1.5KE18CA 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 1.5KE18CA meets industry standards.
7.What is the process for return or replacement of 1.5KE18CA?
All 1.5KE18CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE18CA, 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 1.5KE18CA part is unused and in its original packaging.
Return procedure for 1.5KE18CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE18CA Tags
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