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Taiwan Semiconductor Corporation 1.5KE18A R0G
- Part No.:
- 1.5KE18A R0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE18A R0G.pdf
- Description:
- TVS DIODE 15.3VWM 25.5VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:3,505
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Product details
Overview
1.5KE18A R0G from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 18 V, working stand-off voltage 15.3 V, clamping voltage 25.5 V at 60 A peak pulse current, and junction temperature range −55 °C to +175 °C. It protects automotive power-line interfaces and industrial sensor inputs against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE18A R0G datasheet, 1.5KE18A R0G pinout, 1.5KE18A R0G application, or 1.5KE18A R0G equivalent, key selection criteria include clamping performance under 10/1000 μs surge, low leakage (<1 μA above 10 V), AEC-Q101 qualification status, DO-201 mechanical compatibility, and thermal derating behavior above 25 °C ambient.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: it remains high-impedance below VWM (15.3 V), triggers avalanche conduction at VBR (17.1–18.9 V @ 1 mA), and limits transient voltage to ≤25.5 V at 60 A IPP. Its fast response (<1 ps from 0 V to VBR) enables protection of sensitive analog front-ends and microcontroller I/O pins.
Designed for automotive-grade reliability, the 1.5KE18A R0G meets ISO 7637-2 immunity requirements and supports steady-state power dissipation up to 5 W at TL = 75 °C on 16 mm × 16 mm copper pad. It exhibits 0.088 %/°C VBR temperature coefficient and junction capacitance <1000 pF at VR = 0 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1 mA | 17.1–18.9 V - Ensures reliable turn-on before system overvoltage damages downstream ICs |
| VWM | 15.3 V - Maximum continuous DC or RMS voltage the device blocks without conduction |
| VC @ IPP = 60 A | 25.5 V - Clamped voltage during 10/1000 μs surge; defines worst-case stress on protected circuit |
| PPK | 1500 W - Peak pulse power handling capability per single non-repetitive 10/1000 μs waveform |
| IPP Max | 60 A - Maximum surge current the device safely clamps without failure |
| Junction Temp Range | −55 °C to +175 °C - Enables operation in under-hood automotive and industrial motor-control environments |
| Leakage @ VWM | <1 μA - Minimizes standby power loss and avoids false triggering in high-impedance signal paths |
Pinout & Package
DO-201 axial-leaded package with cathode band marking; two-terminal device requiring no biasing or control signals. Leads are pure tin plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference node | Connected to system ground or low-side return path; carries full surge current during clamping |
| Cathode | Protected line input | Connected to line being protected (e.g., 12 V battery rail); voltage referenced to anode during conduction |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse rating | Supports robust protection against severe load-dump and inductive-switching transients in 12 V automotive systems |
| AEC-Q101 qualified option | Validated for automotive electronics use with extended temperature cycling, humidity, and mechanical shock testing |
| Clamping voltage ≤25.5 V | Keeps protected 16 V-rated microcontrollers and CAN transceivers within safe operating voltage margins |
| Response time <1 ps | Engages before ESD or fast EFT pulses propagate into sensitive analog or digital circuitry |
| UL 94V-0 molding compound | Meets flammability safety requirements for enclosed industrial and transportation equipment enclosures |
Applications
| Automotive Power Distribution | Industrial Sensor Interface |
|---|---|
Use Scenario: 12 V battery rail in engine control units exposed to ISO 7637-2 Pulse 5a (load dump) and Pulse 1 (inductive spike). IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between battery input and upstream DC-DC converter input. Use Value: Limits transient voltage to ≤25.5 V, preventing latch-up or gate oxide damage in 36 V max-input buck controllers. | Use Scenario: 4–20 mA current-loop transmitter output connected to PLC analog input in factory automation. IC Role / Device Role / Timing Role: Line-side TVS protecting op-amp-based current-sense amplifier and isolation barrier driver. Use Value: Suppresses EFT bursts (IEC 61000-4-4) and surge coupling without adding signal-path capacitance that degrades loop bandwidth. |
| LED Driver Power Input | RS-485 Communication Port |
Use Scenario: Constant-current LED driver board powered from 24 V industrial supply subject to switching noise and cable discharge events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main DC input, upstream of input filter and controller IC. Use Value: Absorbs 1500 W surges while maintaining VWM = 15.3 V margin above 24 V nominal, avoiding false triggering during brownout conditions. | Use Scenario: RS-485 transceiver bus lines (A/B) in building management system nodes installed in electrically noisy HVAC ducts. IC Role / Device Role / Timing Role: Bidirectional-capable TVS pair (using 1.5KE18CA variant) across differential bus lines to suppress common-mode transients. Use Value: Clamps ±25.5 V peaks without distorting differential signaling integrity, preserving >500 kbps data rate compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ18A | Same DO-214AC (SMA) package; lower PPK = 400 W; VC = 29.2 V @ 13.7 A | Not rated for ISO 7637-2 Pulse 5a; suitable only for lower-energy ESD/EFT scenarios | Select when space-constrained PCB layout requires surface-mount and surge energy is ≤400 W |
| ON Semiconductor 1.5SMC18A | DO-214AB (SMC) package; PPK = 1500 W; VC = 27.7 V @ 54.3 A; higher thermal resistance | Requires larger pad area for equivalent 5 W steady-state dissipation; not AEC-Q101 qualified | Select when DO-214AB footprint is already standardized and automotive qualification is not required |
Compared with 1.5KE18A R0G, SMAJ18A offers smaller size but significantly lower surge capacity and no automotive qualification, while 1.5SMC18A matches peak power but lacks AEC-Q101 validation and has less favorable thermal performance in high-ambient environments.
Availability
1.5KE18A R0G is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface, LED driver input protection, and RS-485 communication port hardening requiring stable component supply across production lifecycles.
Supply support for 1.5KE18A 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for industrial and automotive markets.
The 1.5KE series was designed specifically for high-energy transient suppression in harsh environments, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust DO-201 packaging for through-hole reliability.
FAQ
What is the maximum clamping voltage of the 1.5KE18A R0G under standard test conditions?
The 1.5KE18A R0G has a maximum clamping voltage (VC) of 25.5 V when subjected to a 10/1000 μs surge waveform at peak impulse current (IPP) of 60 A. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during transient events. The 1.5KE18A R0G maintains this clamping performance across its specified junction temperature range of −55 °C to +175 °C.
Is the 1.5KE18A R0G AEC-Q101 qualified?
The 1.5KE18A R0G is not explicitly marked as AEC-Q101 qualified in the provided documentation. While the 1.5KE series offers an AEC-Q101 qualified variant (denoted by "H" suffix, e.g., 1.5KE18AH), the "R0G" suffix corresponds to tape-and-reel packaging and does not indicate qualification. Engineers requiring AEC-Q101 compliance must select the H-suffix version; the 1.5KE18A R0G remains suitable for industrial applications meeting ISO 7637-2 immunity requirements.
What is the working stand-off voltage (VWM) of the 1.5KE18A R0G, and why is it important?
The 1.5KE18A R0G has a working stand-off voltage (VWM) of 15.3 V, meaning it remains non-conductive up to this DC or RMS voltage level. This parameter ensures reliable blocking during normal operation while providing sufficient margin below the nominal 18 V breakdown voltage (VBR). For a 12 V automotive system, VWM = 15.3 V prevents false triggering during load-dump overshoots up to ~15 V, making the 1.5KE18A R0G appropriate for protecting 16 V-rated downstream ICs.
How does the 1.5KE18A R0G compare to bidirectional TVS diodes in the same series?
The 1.5KE18A R0G is unidirectional and intended for DC line protection where polarity is fixed (e.g., positive supply rails). Bidirectional variants like 1.5KE18CA provide symmetrical clamping for AC or differential lines but exhibit identical VBR, VC, and PPK ratings. The 1.5KE18A R0G features a cathode band for polarity identification and cannot be used in AC-coupled applications without risk of forward conduction; selecting the correct polarity version is essential for proper 1.5KE18A R0G integration.
What thermal derating applies to the 1.5KE18A R0G above 25 °C ambient temperature?
The 1.5KE18A R0G follows a linear derating curve: peak pulse power (PPK) decreases from 1500 W at TA = 25 °C to zero at TA = 175 °C, with 50% derating occurring near 100 °C ambient. Steady-state power dissipation (PD) is rated at 5 W only when lead temperature (TL) is maintained at 75 °C using a 16 mm × 16 mm copper pad. These derating rules ensure safe 1.5KE18A R0G operation in high-temperature enclosures without thermal runaway.
1.5KE18A 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:
- 1
- Bidirectional Channels:
- -
- 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
1.5KE18A R0G FAQ
1.How can I place an order for 1.5KE18A R0G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE18A 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 1.5KE18A R0G reliable?
The price and inventory of 1.5KE18A R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE18A R0G is usually 5 days.
3.What payment methods are accepted for 1.5KE18A R0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE18A R0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE18A R0G?
1.5KE18A R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE18A 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 1.5KE18A R0G?
For technical support, including 1.5KE18A R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE18A R0G requirements.
6.How does Aetrix verify that 1.5KE18A R0G is sourced from the original manufacturer or authorized distributors?
All 1.5KE18A 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 1.5KE18A R0G meets industry standards.
7.What is the process for return or replacement of 1.5KE18A R0G?
All 1.5KE18A R0G units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE18A 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 1.5KE18A R0G part is unused and in its original packaging.
Return procedure for 1.5KE18A R0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE18A R0G Tags
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