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Taiwan Semiconductor Corporation 1V5KE18CA
- Part No.:
- 1V5KE18CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1V5KE18CA.pdf
- Description:
- TVS DIODE 15.3VWM 26.2VC DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:2,243
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Product details
Overview
1V5KE18CA from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with breakdown voltage 17.1–18.9 V at 1 mA, reverse stand-off voltage 15.3 V, clamping voltage 26.2 V at 59.5 A peak pulse current, and operating junction temperature range −55 °C to +175 °C. It protects power rails and I/O lines against ESD, lightning-induced surges, and inductive switching transients in industrial control systems.
For engineers reviewing the 1V5KE18CA datasheet, 1V5KE18CA pinout, 1V5KE18CA application, or 1V5KE18CA equivalent, key selection criteria include its bidirectional clamping behavior, 26.2 V clamping voltage under 59.5 A surge, DO-201 mechanical compatibility, low leakage (<1 µA above 15.3 V), and RoHS/halogen-free compliance for high-reliability embedded designs.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds its breakdown threshold (17.1–18.9 V), it avalanches rapidly (<1 ns response) to divert surge current away from downstream circuitry. Its bidirectional symmetry enables protection of AC-coupled or floating signal paths without polarity concerns.
The device sustains 1500 W peak pulse power (10/1000 µs waveform), exhibits low incremental surge resistance for stable clamping, and maintains <1 µA reverse leakage at VRWM - critical for low-power sensor interfaces and battery-backed systems where standby current matters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VBR) | 17.1–18.9 V at 1 mA - defines precise avalanche initiation point for reliable overvoltage triggering |
| Reverse Stand-off Voltage (VRWM) | 15.3 V - maximum continuous working voltage before leakage rises significantly |
| Clamping Voltage (VC) | 26.2 V at 59.5 A IPPM - limits voltage seen by protected IC during worst-case surge |
| Peak Pulse Power (PPPM) | 1500 W (10/1000 µs) - supports robust immunity to IEC 61000-4-5 Level 4 surges |
| Junction Temperature Range | −55 °C to +175 °C - enables deployment in automotive engine bays and industrial motor drives |
| Package | DO-201 - industry-standard axial leaded package with UL 94V-0 molding and tin-plated leads |
Pinout & Package
1V5KE18CA uses a DO-201 axial package with two terminals: cathode-marked end (band) and anode. The device is bidirectional - polarity marking indicates manufacturing orientation only; electrical behavior is symmetric across both terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Surge current return path | Completes low-impedance shunt path during bidirectional overvoltage events |
| Cathode (banded end) | Surge current entry point | Marking aids visual orientation during manual assembly; no functional polarity dependence |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR over lifetime and resistance to moisture/humidity-induced drift |
| Low incremental surge resistance | Minimizes VC rise under high-current transients, improving clamping precision |
| Fast response time (<1 ns) | Activates before sensitive CMOS inputs can be damaged by ESD or fast transients |
| RoHS & halogen-free compliance | Meets IEC 61249-2-21 and global environmental directives for PCB assembly |
| UL 94V-0 molding compound | Provides flame-retardant housing essential for safety-certified industrial equipment |
Applications
| Industrial Motor Drives | Programmable Logic Controllers (PLCs) |
|---|---|
Use Scenario: Protection of 24 V DC input power rails against inductive kickback from contactors and solenoids. IC Role / Device Role / Timing Role: Shunt TVS diode placed across rail-to-ground to clamp transients up to ±1 kV. Use Value: Prevents latch-up or permanent damage to microcontrollers and isolated power supplies during frequent switching cycles. | Use Scenario: Safeguarding digital I/O modules from EFT (electrical fast transients) on field wiring. IC Role / Device Role / Timing Role: Bidirectional clamping element on each I/O line, installed before optocoupler input stage. Use Value: Maintains signal integrity and prevents false triggering during 4 kV/5 kHz EFT bursts per IEC 61000-4-4. |
| Smart Building Sensors | Renewable Energy Inverters |
Use Scenario: Overvoltage protection for RS-485 communication lines exposed to outdoor lightning coupling. IC Role / Device Role / Timing Role: Line-to-line and line-to-ground TVS pair on differential bus interface. Use Value: Enables >10 kV surge immunity while preserving signal rise/fall times due to low capacitance (~100 pF). | Use Scenario: DC-link surge suppression in solar string inverters subjected to grid-switching transients. IC Role / Device Role / Timing Role: Parallel-connected TVS array across 600 V DC bus to absorb repetitive 1500 W pulses. Use Value: Extends electrolytic capacitor life and avoids MOSFET avalanche failure during utility fault recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18CA | Lower peak power (600 W), smaller SMB package (surface-mount), same VBR range (18.9–20.9 V) | Better suited for space-constrained PCBs; less robust for high-energy surges | Select when board area is limited and surge energy stays below 600 W |
| 1N6277A | Same die, identical specs, JEDEC-registered part number; functionally identical to 1V5KE18CA | No difference - direct manufacturer cross-reference, same DO-201 packaging and marking | Preferred for legacy BOMs referencing JEDEC nomenclature |
Compared with SMBJ18CA and 1N6277A, the 1V5KE18CA offers higher surge handling (1500 W vs. 600 W) in through-hole DO-201 format, making it optimal for high-energy industrial environments where mechanical robustness and thermal mass matter - whereas SMBJ18CA trades power for footprint, and 1N6277A provides identical performance under JEDEC naming.
Availability
1V5KE18CA is available at Aetrix Electronics and suitable for industrial motor drives, programmable logic controllers (PLCs), smart building sensors, and renewable energy inverters requiring stable component supply and long-term obsolescence management.
Supply support for 1V5KE18CA 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, specializing in power management, protection, and signal conditioning devices.
The 1V5KE series is designed specifically for high-energy transient suppression in harsh industrial and infrastructure applications - emphasizing rugged packaging, wide temperature operation, and repeatable clamping performance under repetitive surge stress.
FAQ
What does the "CA" suffix mean in 1V5KE18CA?
The "CA" suffix in 1V5KE18CA denotes a bidirectional configuration - meaning the device provides symmetrical clamping for both positive and negative transients. Unlike unidirectional variants (e.g., 1V5KE18A), 1V5KE18CA has no functional polarity and protects AC-coupled or floating nodes without requiring orientation during placement. This is confirmed in TSC's datasheet Section "Devices for Bipolar Applications".
What is the clamping voltage of 1V5KE18CA and how is it measured?
The clamping voltage (VC) of 1V5KE18CA is 26.2 V, measured at a peak pulse current (IPPM) of 59.5 A using the standard 10/1000 µs double-exponential waveform. This value represents the maximum voltage that appears across the device during a defined surge event - a critical parameter for ensuring downstream components remain within their absolute maximum ratings. Data is sourced from TSC's Electrical Specifications table.
Is 1V5KE18CA RoHS and halogen-free compliant?
Yes, 1V5KE18CA is RoHS compliant and halogen-free per IEC 61249-2-21. The device uses lead-free, tin-plated leads solderable per J-STD-002, and its molding compound meets UL 94V-0 flammability rating. These compliance attributes are explicitly stated in the "Features" section of the official TSC datasheet (Version D2112).
Can 1V5KE18CA replace 1N6277A in existing designs?
Yes, 1V5KE18CA is functionally identical to 1N6277A - both share identical electrical specifications, DO-201 packaging, and bidirectional behavior. TSC lists 1N6277A as the JEDEC-registered part number for this device in its datasheet's Electrical Specifications table. No layout or schematic changes are required when substituting 1V5KE18CA for 1N6277A.
What is the maximum junction temperature rating for 1V5KE18CA?
The maximum junction temperature (TJ MAX) for 1V5KE18CA is +175 °C, with a full operating range from −55 °C to +175 °C. This rating is specified in the Absolute Maximum Ratings table and enables use in high-temperature environments such as motor drive enclosures or solar inverter heat sinks - provided thermal design accounts for power dissipation under surge conditions.
1V5KE18CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-201AD, Axial
- Series:
- -
- 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:
- 26.2V
- Current - Peak Pulse (10/1000µs):
- 59.5A
- 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-201AD
1V5KE18CA FAQ
1.How can I place an order for 1V5KE18CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1V5KE18CA 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 1V5KE18CA reliable?
The price and inventory of 1V5KE18CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1V5KE18CA is usually 5 days.
3.What payment methods are accepted for 1V5KE18CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1V5KE18CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1V5KE18CA?
1V5KE18CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1V5KE18CA 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 1V5KE18CA?
For technical support, including 1V5KE18CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1V5KE18CA requirements.
6.How does Aetrix verify that 1V5KE18CA is sourced from the original manufacturer or authorized distributors?
All 1V5KE18CA 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 1V5KE18CA meets industry standards.
7.What is the process for return or replacement of 1V5KE18CA?
All 1V5KE18CA units undergo pre-shipment inspection (PSI). If there is an issue with 1V5KE18CA, 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 1V5KE18CA part is unused and in its original packaging.
Return procedure for 1V5KE18CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1V5KE18CA Tags
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