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Taiwan Semiconductor Corporation 1V5KE18A
- Part No.:
- 1V5KE18A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1V5KE18A.pdf
- Description:
- TVS DIODE 15.3VWM 26.2VC DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:4,887
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Product details
Overview
1V5KE18A from Taiwan Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-201 package, rated for 1500W peak pulse power at 1.0ms, with breakdown voltage 17.1–18.9V at 1mA test current, clamping voltage 26.2V at 59.5A peak pulse current, and reverse stand-off voltage 15.3V - deployed for surge protection in DC power rails and I/O interfaces.
For engineers reviewing the 1V5KE18A datasheet, 1V5KE18A pinout, 1V5KE18A application, or 1V5KE18A equivalent, key selection factors include its unidirectional polarity, DO-201 mechanical form factor, 175°C max junction temperature, low incremental surge resistance, and sub-1μA leakage above 10V - critical for high-reliability industrial and automotive power interface designs.
Technical Context
The 1V5KE18A operates as a silicon avalanche diode optimized for fast-response transient suppression. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1μA at VRWM), while its 1500W peak pulse rating supports robust immunity against 8/20μs and 10/1000μs surges per IEC 61000-4-5.
Designed for unidirectional operation only, it features a cathode band marking, pure tin-plated leads compliant with J-STD-002, and meets UL 94V-0 flammability requirements. It does not support bidirectional use - that requires the CA-suffixed variant (e.g., 1V5KE18CA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (1ms) | 1500W - sustains high-energy transients without failure in telecom or industrial power inputs |
| Breakdown Voltage VBR | 17.1–18.9V @ 1mA - defines precise avalanche onset for predictable clamping threshold |
| Clamping Voltage VC | 26.2V @ 59.5A - limits downstream voltage stress during surge events |
| Reverse Stand-off Voltage VRWM | 15.3V - maximum continuous DC operating voltage before significant leakage begins |
| Junction Temperature Range | −55°C to +175°C - enables deployment in under-hood automotive or high-temp industrial enclosures |
| Package | DO-201 - axial-leaded through-hole package with 0.090g mass and JEDEC-standard footprint |
Pinout & Package
DO-201 package: axial-leaded, glass-passivated, cathode-banded end. 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 | Low-side reference terminal | Connected to ground or return path; conducts during reverse-biased surge |
| Cathode | High-side surge input terminal | Connected to protected line; avalanche conduction initiates here during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term stability of VBR and low parameter drift across thermal cycling |
| 1500W peak pulse capability | Withstands IEC 61000-4-5 Level 4 surges (4kV line-to-earth) without degradation |
| Fast response time (<1ps) | Activates before sensitive downstream ICs experience damaging overvoltage |
| Low incremental surge resistance | Minimizes voltage overshoot during high-di/dt transients, improving clamping fidelity |
Applications
| DC Power Input Protection | Automotive ECU Power Rail |
|---|---|
Use Scenario: Protecting 12V/24V DC input stages of industrial PLCs against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp positive-going surges. Use Value: Clamps to 26.2V at 59.5A, limiting stress on upstream fuse and downstream DC-DC converter input stage. | Use Scenario: Safeguarding microcontroller power supply pins in engine control units exposed to alternator load dump. IC Role / Device Role / Timing Role: Primary surge shunt on main battery feed, mounted near connector entry point. Use Value: Withstands 1500W pulses up to 175°C junction temperature, meeting AEC-Q101 stress requirements. |
| Industrial Sensor Interface | Telecom Line Card Protection |
Use Scenario: Shielding 4–20mA analog sensor inputs from ESD and inductive switching transients in factory automation. IC Role / Device Role / Timing Role: Unidirectional TVS on signal line referenced to local ground, upstream of signal conditioning op-amp. Use Value: Sub-1μA leakage at 15.3V ensures minimal impact on loop accuracy and offset error budget. | Use Scenario: Front-end protection for Ethernet PHY power supplies in outdoor base station line cards. IC Role / Device Role / Timing Role: Secondary-level TVS on +3.3V or +5V bias rails feeding PHY ICs. Use Value: DO-201 axial package allows manual rework and fits legacy through-hole layouts without redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | Surface-mount SMB package; same 1500W rating but lower clamping voltage (29.2V @ 51.7A) | Requires PCB re-layout; better suited for space-constrained designs with automated assembly | Select when board area is limited and SMT process is available |
| P6KE18A | Legacy 600W rating; larger DO-15 package; higher clamping voltage (27.7V @ 21.7A) | Lower surge margin; suitable only for non-critical or low-energy transient environments | Select only if cost sensitivity outweighs surge performance requirements |
Compared with SMBJ18A and P6KE18A, the 1V5KE18A delivers superior energy handling in a proven through-hole package - offering higher reliability for high-di/dt events in ruggedized systems where manual assembly or field serviceability matters.
Availability
1V5KE18A is available at Aetrix Electronics and suitable for DC power input protection, automotive ECU power rails, industrial sensor interfaces, and telecom line card protection requiring stable component supply and long-lifecycle support.
Supply support for 1V5KE18A 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 - headquartered in Hsinchu, Taiwan.
The 1V5KE18A belongs to TSC's 1V5KE series of high-power unidirectional TVS diodes, engineered specifically for industrial-grade surge immunity in harsh environments with wide ambient temperature ranges.
FAQ
What is the polarity configuration of the 1V5KE18A?
The 1V5KE18A is a unidirectional TVS diode with cathode-band marking indicating the high-side terminal. It conducts only during reverse-bias overvoltage events and must be installed with cathode toward the protected line. Bidirectional operation requires the 1V5KE18CA variant - the 1V5KE18A itself is not rated for symmetrical surge suppression.
Does the 1V5KE18A meet RoHS and halogen-free standards?
Yes, the 1V5KE18A complies with RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. Its molding compound meets UL 94V-0 flammability rating, and its pure tin-plated leads satisfy J-STD-002 solderability requirements - all confirmed in Taiwan Semiconductor's D2112 datasheet revision.
What is the maximum peak pulse current the 1V5KE18A can handle?
The 1V5KE18A supports a peak pulse current (IPPM) of 59.5A under 10/1000μs waveform conditions, corresponding to its 1500W peak pulse power rating. This value is measured at 25°C ambient and derates linearly above 75°C lead temperature per the steady-state derating curve in the datasheet.
Can the 1V5KE18A be used in place of the P6KE18A?
No - the 1V5KE18A is not a drop-in replacement for the P6KE18A. While both are unidirectional DO-package TVS diodes, the 1V5KE18A delivers 1500W vs. P6KE18A's 600W, has tighter VBR tolerance (±5.5% vs. ±10%), and uses DO-201 instead of DO-15. PCB layout, thermal design, and surge margin must be re-evaluated if substituting the 1V5KE18A for the P6KE18A.
What is the reverse leakage current specification for the 1V5KE18A at 15.3V?
At its rated reverse stand-off voltage of 15.3V, the 1V5KE18A exhibits typical reverse leakage current (IR) less than 1μA - verified at 25°C per the Electrical Specifications table. This low leakage preserves system efficiency and avoids false triggering in high-impedance sensing circuits powered by the protected rail.
1V5KE18A 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:
- 1
- Bidirectional Channels:
- -
- 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
1V5KE18A FAQ
1.How can I place an order for 1V5KE18A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1V5KE18A 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 1V5KE18A reliable?
The price and inventory of 1V5KE18A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1V5KE18A is usually 5 days.
3.What payment methods are accepted for 1V5KE18A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1V5KE18A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1V5KE18A?
1V5KE18A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1V5KE18A 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 1V5KE18A?
For technical support, including 1V5KE18A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1V5KE18A requirements.
6.How does Aetrix verify that 1V5KE18A is sourced from the original manufacturer or authorized distributors?
All 1V5KE18A 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 1V5KE18A meets industry standards.
7.What is the process for return or replacement of 1V5KE18A?
All 1V5KE18A units undergo pre-shipment inspection (PSI). If there is an issue with 1V5KE18A, 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 1V5KE18A part is unused and in its original packaging.
Return procedure for 1V5KE18A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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