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Taiwan Semiconductor Corporation 1.5KE18C
- Part No.:
- 1.5KE18C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE18C.pdf
- Description:
- 1500W, 18V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:8,015
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Product details
Overview
1.5KE18C from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with 18V nominal breakdown voltage (VBR min/max = 16.2V/19.8V), 14.5V working stand-off voltage (VWM), and 26.5V clamping voltage (VC) at 59A peak pulse current. It protects automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE18C datasheet, 1.5KE18C pinout, 1.5KE18C application, or 1.5KE18C equivalent, this page delivers verified electrical specs, DO-201 terminal polarity, AEC-Q101 qualification status, clamping performance under 10/1000μs surge, and real-world ESD/inductive-switching protection use cases - all confirmed from Taiwan Semiconductor's O2104 datasheet.
Technical Context
The 1.5KE18C operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 16.2–19.8V breakdown range at 1mA test current. Its low dynamic impedance ensures rapid clamping to ≤26.5V during 10/1000μs transients, limiting energy dissipation in protected ICs.
With a maximum junction temperature of +175°C and thermal derating above 25°C ambient, it sustains 1500W non-repetitive peak power per JEDEC standard. Its <1μA leakage at 14.5V VWM and 0.088%/°C VBR temperature coefficient support stable operation across automotive temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=1mA | 16.2V min / 19.8V max - defines precise avalanche onset for reliable overvoltage detection |
| VWM | 14.5V - maximum continuous reverse voltage before leakage exceeds 1μA; sets safe operating margin below VBR |
| VC @ IPP=59A | 26.5V - clamped voltage during 10/1000μs surge; determines maximum stress on downstream circuitry |
| PPK | 1500W - peak pulse power handling capability; enables robust protection against high-energy transients |
| IPP | 59A - peak impulse current at rated clamping voltage; quantifies surge current absorption capacity |
| TJ max | +175°C - maximum junction temperature; supports under-hood and industrial environments without thermal shutdown |
| Package | DO-201 - industry-standard axial leaded package with UL 94V-0 molding compound and tin-plated leads |
Pinout & Package
DO-201 package: axial-leaded, cylindrical epoxy body with cathode band marking for unidirectional polarity. Leads are pure tin-plated, solderable per J-STD-002, and pass JESD 201 Class 2 whisker testing. Weight ≈ 0.090g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Forward conduction path / low-impedance return during clamping | Connected to ground or low-side rail; carries full surge current during transient suppression |
| Cathode (banded end) | Reverse-biased avalanche node / clamping reference | Connected to protected line (e.g., 12V rail); initiates breakdown when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| 1500W 10/1000μs surge rating | Withstands high-energy load dump and inductive switching events per ISO 7637-2 |
| Clamping voltage ≤26.5V at 59A | Limits voltage overshoot to protect 24V-rated microcontrollers and CAN transceivers |
| Leakage current <1μA at 14.5V | Minimizes standby power loss in always-on systems such as telematics modules |
| Fast response time <1.0ps | Engages before sensitive logic circuits experience damaging overvoltage stress |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Suppresses load-dump transients (ISO 7637-2 Pulse 5a) on 12V/24V vehicle battery lines feeding ECUs and infotainment systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground, clamping surges within nanoseconds. Use Value: Prevents latch-up or permanent damage to voltage regulators and microcontrollers by limiting peak voltage to 26.5V. |
Use Scenario: Shields digital input/output channels of programmable logic controllers from inductive kickback caused by relay or solenoid switching. IC Role / Device Role / Timing Role: Standoff device mounted at connector entry point, absorbing repetitive 10/1000μs transients up to 1500W. Use Value: Extends field reliability by eliminating false triggering and component failure due to EFT bursts (IEC 61000-4-4). |
| LED Driver Overvoltage Protection | DC Power Supply Input Stage |
Use Scenario: Guards constant-current LED drivers in street lighting against lightning-induced surges on AC/DC front-end inputs. IC Role / Device Role / Timing Role: Primary-level TVS on DC bus, triggered before upstream MOSFETs or PWM controllers see overvoltage. Use Value: Maintains luminous output stability by preventing driver IC reset or gate oxide breakdown during 1kV/0.5J transients. |
Use Scenario: Protects AC-DC adapter secondary-side outputs (e.g., +5V, +12V) from back-fed transients originating in connected peripherals. IC Role / Device Role / Timing Role: Final-stage clamping element after filtering, ensuring clean DC delivery to downstream loads. Use Value: Reduces field return rates by blocking >1000V spikes that would otherwise exceed IC absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | 600W rating, SMC package, bidirectional configuration unless specified as 'A' suffix | Limited to lower-energy transients; requires PCB layout change due to surface-mount footprint | Select when board space is constrained and surge energy is ≤600W (e.g., consumer USB ports) |
| 1N6277A | Same DO-201 package, tighter VBR tolerance (17.1–18.9V vs. 16.2–19.8V), identical 1500W rating | Offers improved voltage consistency for precision clamp thresholds in safety-critical subsystems | Prefer for new designs requiring tighter VBR binning without changing layout or thermal design |
Compared with SMBJ18A, the 1.5KE18C delivers 2.5× higher surge power in through-hole format; compared with 1N6277A, it trades tighter VBR control for broader availability and lower cost while maintaining identical clamping performance and thermal limits.
Availability
1.5KE18C is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC I/O hardening, and LED driver overvoltage suppression requiring stable component supply, long-term lifecycle assurance, and AEC-Q101 compliance.
Supply support for 1.5KE18C 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 specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and consumer markets.
The 1.5KE series was designed specifically for high-energy transient suppression in harsh environments, meeting ISO 7637-2 and AEC-Q101 requirements while delivering consistent clamping performance across temperature and lifetime.
FAQ
What is the breakdown voltage range of the 1.5KE18C?
The 1.5KE18C has a guaranteed breakdown voltage (VBR) range of 16.2V to 19.8V at 1mA test current, measured per ANSI/IEEE C62.35. This range reflects manufacturing tolerance and ensures reliable triggering across production lots while maintaining compatibility with 18V nominal system rails.
Is the 1.5KE18C unidirectional or bidirectional?
The 1.5KE18C is a unidirectional TVS diode, indicated by the 'C' suffix and cathode band marking on the DO-201 package. It conducts only during reverse overvoltage events and blocks forward current like a standard rectifier diode - unlike bidirectional variants (e.g., 1.5KE18CA) used in AC line protection.
Does the 1.5KE18C meet AEC-Q101 qualification?
Yes, the 1.5KE18C is AEC-Q101 qualified, as confirmed in Taiwan Semiconductor's O2104 datasheet. This qualification covers stress tests including high-temperature operating life, temperature cycling, and mechanical shock - validating its suitability for automotive under-hood and chassis-mounted applications.
What is the maximum clamping voltage of the 1.5KE18C at rated surge current?
The 1.5KE18C clamps to a maximum of 26.5V at 59A peak pulse current (IPP), defined under the standard 10/1000μs double-exponential waveform. This value is critical for determining whether downstream components (e.g., 30V-rated LDOs) remain within their absolute maximum voltage ratings during transient events.
Can the 1.5KE18C be used in place of the 1.5KE18A?
No - the 1.5KE18C and 1.5KE18A differ in VBR tolerance: 1.5KE18C specifies 16.2–19.8V, while 1.5KE18A tightens this to 17.1–18.9V. Substituting without design review may affect clamping threshold timing and system-level immunity margins, especially in safety-critical automotive functions.
1.5KE18C 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):
- 14.5V
- Voltage - Breakdown (Min):
- 16.2V
- Voltage - Clamping (Max) @ Ipp:
- 26.5V
- Current - Peak Pulse (10/1000µs):
- 59A
- 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
1.5KE18C FAQ
1.How can I place an order for 1.5KE18C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE18C 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 1.5KE18C reliable?
The price and inventory of 1.5KE18C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE18C is usually 5 days.
3.What payment methods are accepted for 1.5KE18C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE18C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE18C?
1.5KE18C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE18C 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 1.5KE18C?
For technical support, including 1.5KE18C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE18C requirements.
6.How does Aetrix verify that 1.5KE18C is sourced from the original manufacturer or authorized distributors?
All 1.5KE18C 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 1.5KE18C meets industry standards.
7.What is the process for return or replacement of 1.5KE18C?
All 1.5KE18C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE18C, 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 1.5KE18C part is unused and in its original packaging.
Return procedure for 1.5KE18C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE18C Tags
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