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Taiwan Semiconductor Corporation 1.5KE18CA R0G
- Part No.:
- 1.5KE18CA R0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE18CA R0G.pdf
- Description:
- TVS DIODE 15.3VWM 25.5VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:2,809
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Product details
Overview
1.5KE18CA R0G 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 AEC-Q101 qualification for automotive use. It protects power rails and signal lines against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients in automotive ECUs.
For engineers reviewing the 1.5KE18CA R0G datasheet, 1.5KE18CA R0G pinout, 1.5KE18CA R0G application, or 1.5KE18CA R0G equivalent, key selection criteria include bidirectional clamping performance, 10/1000μs surge rating, junction temperature range (–55°C to +175°C), and compliance with automotive ESD and EFT immunity standards.
Technical Context
The 1.5KE18CA R0G 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 rapid response (<5.0ns) to fast transients while maintaining <1μA leakage at 14.5V (VWM).
Designed for unclamped inductive load switching and electrical fast transient (EFT) protection, it delivers 1500W peak pulse power per 10/1000μs waveform, derates linearly above 25°C ambient, and meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 16.2V / 19.8V - Ensures reliable conduction onset across manufacturing tolerance at 1mA test current |
| VWM | 14.5V - Maximum continuous DC or RMS voltage the device blocks without significant leakage |
| VC @ IPP | 26.5V at 59A - Clamped voltage during 10/1000μs surge, limiting downstream IC stress |
| PPK | 1500W - Peak transient power handling capability under standardized surge waveform |
| Junction Temp Range | –55°C to +175°C - Enables operation in under-hood automotive environments |
| Package | DO-201 - Industry-standard axial-leaded package with tin-plated leads, UL 94V-0 molding |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
DO-201 package: axial-leaded, cylindrical epoxy body with cathode band marking for unidirectional variants; 1.5KE18CA R0G is bidirectional and marked with "18C" code - no polarity marking required. Leads are pure tin-plated, solderable per J-STD-002, weight ≈ 0.090g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | Both terminals function identically - no fixed anode/cathode; clamps positive or negative transients equally |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 1500W 10/1000μs surge rating | Withstands high-energy load dump and inductive kick events common in 12V automotive systems |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (EFT) |
| Low leakage & fast response | <1μA at 14.5V ensures minimal standby power loss; <5.0ns response prevents transient propagation to protected ICs |
| AEC-Q101 qualification | Meets automotive reliability requirements including HTOL, TC, and UHAST - suitable for ECU front-end protection |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protects microcontroller GPIO and CAN transceiver power rails from load dump and battery reverse connection transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed at board-level input connector to clamp ±100V transients before LDOs and interface ICs. Use Value: Limits clamped voltage to 26.5V, ensuring downstream 3.3V/5V logic remains within absolute maximum ratings during ISO 7637-2 Pulse 2b events. | Use Scenario: Shields 24V digital input optocoupler circuitry from inductive switching noise generated by solenoid valves and contactors. IC Role / Device Role / Timing Role: Primary surge suppression device on field-side input traces, located immediately after screw terminal block. Use Value: Absorbs 1500W surge energy without degradation, preventing false triggering and latch-up in isolation stage components. |
| LED Headlamp Driver Unit | Automotive Infotainment USB Port |
Use Scenario: Guards buck converter feedback and enable pins against ESD and load dump coupling through shared harnesses. IC Role / Device Role / Timing Role: Secondary-level TVS on low-voltage control signals adjacent to high-current LED driver ICs. Use Value: Fast <5.0ns response prevents transient-induced reset or register corruption in timing-critical PWM controllers. | Use Scenario: Provides ESD and EFT protection on VBUS and D+/D− lines of USB 2.0 ports exposed to user-accessible connectors. IC Role / Device Role / Timing Role: Board-level transient suppressor placed before USB PHY IC, compliant with IEC 61000-4-2 Level 4 (±15kV air/±8kV contact). Use Value: Maintains <1μA leakage at 14.5V, avoiding signal integrity issues or false enumeration on high-speed data lines. |
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; VC = 29.2V @ 13.7A | Not AEC-Q101 qualified; limited to industrial/commercial grade | Select when space-constrained PCB layout favors surface-mount and surge energy is ≤400W |
| ON Semiconductor 1.5KE18CA | Identical electrical specs and DO-201 package; same AEC-Q101 qualification; different date coding and reel packaging | No functional difference - direct second-source option with identical automotive qualification | Choose for supply chain diversification without design or validation impact |
Compared with SMAJ18CA, 1.5KE18CA R0G delivers 3.75× higher surge power handling and automotive qualification; compared with ON Semiconductor's 1.5KE18CA, it offers identical performance with Taiwan Semiconductor's traceable lot control and RoHS/halogen-free compliance per IEC 61249-2-21.
Availability
1.5KE18CA R0G is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controller inputs, and LED lighting driver protection requiring stable component supply across extended temperature and high-reliability environments.
Supply support for 1.5KE18CA R0G 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 is designed specifically for high-energy transient suppression in harsh automotive and industrial environments, emphasizing AEC-Q101 reliability, ISO 7637-2 compliance, and robust DO-201 packaging for through-hole mounting stability.
FAQ
What does the 'CA' suffix mean in 1.5KE18CA R0G?
The 'CA' suffix in 1.5KE18CA R0G indicates a bidirectional configuration - meaning the device clamps voltage transients equally in both polarities. Unlike unidirectional 'A' variants (e.g., 1.5KE18A), 1.5KE18CA R0G has no cathode marking and functions symmetrically, making it ideal for AC signal lines, differential buses, or floating power domains where polarity reversal may occur.
Is 1.5KE18CA R0G AEC-Q101 qualified?
Yes, 1.5KE18CA R0G is AEC-Q101 qualified. This certification confirms that the device has passed rigorous stress tests including high-temperature operating life (HTOL), temperature cycling (TC), and unbiased highly accelerated stress testing (UHAST), validating its suitability for automotive under-hood and cabin applications where reliability over 15+ years is required.
What is the clamping voltage of 1.5KE18CA R0G and why does it matter?
The clamping voltage (VC) of 1.5KE18CA R0G is 26.5V at 59A peak pulse current (10/1000μs waveform). This value defines the maximum voltage seen by downstream circuitry during a surge event - critical for ensuring protected ICs remain within their absolute maximum voltage ratings. A lower VC relative to VBR indicates superior clamping efficiency, and 26.5V provides safe margin for 24V automotive systems with 3.3V/5V logic interfaces.
Can 1.5KE18CA R0G be used in place of a unidirectional TVS like 1.5KE18A?
No - 1.5KE18CA R0G is bidirectional and cannot replace unidirectional 1.5KE18A in circuits requiring DC polarity-specific clamping, such as DC power rail protection with defined anode/cathode orientation. Substituting 1.5KE18CA R0G for 1.5KE18A would eliminate polarity-dependent forward conduction behavior and may compromise protection in rectified or single-polarity paths.
What packaging options are available for 1.5KE18CA R0G?
1.5KE18CA R0G is supplied in DO-201 package with tape-and-reel packaging (1,250 pcs/reel) under ordering code 1.5KE18CA R0G. The 'R0G' suffix denotes green (halogen-free) compound and tape-and-reel delivery. Ammo box (500 pcs) is available via alternate ordering code 1.5KE18CA A0G, but R0G is the standard industrial and automotive shipping format.
1.5KE18CA R0G 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:
- Discontinued at Digi-Key
- 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 R0G FAQ
1.How can I place an order for 1.5KE18CA R0G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE18CA R0G 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 R0G reliable?
The price and inventory of 1.5KE18CA R0G 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 R0G is usually 5 days.
3.What payment methods are accepted for 1.5KE18CA R0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE18CA R0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE18CA R0G?
1.5KE18CA R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE18CA R0G 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 R0G?
For technical support, including 1.5KE18CA R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE18CA R0G requirements.
6.How does Aetrix verify that 1.5KE18CA R0G is sourced from the original manufacturer or authorized distributors?
All 1.5KE18CA R0G 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 R0G meets industry standards.
7.What is the process for return or replacement of 1.5KE18CA R0G?
All 1.5KE18CA R0G units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE18CA R0G, 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 R0G part is unused and in its original packaging.
Return procedure for 1.5KE18CA R0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE18CA R0G Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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Diodes Incorporated
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