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Taiwan Semiconductor Corporation 1.5KE120A
- Part No.:
- 1.5KE120A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE120A.pdf
- Description:
- TVS 1500W 120V 5% UNIDIR DO-201
- Quantity:
- Payment:
- Shipping:
Inventory:9,665
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Product details
Overview
1.5KE120A from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with 120V nominal breakdown voltage (VBR min/max = 114V/126V at 1mA), 102V working stand-off voltage (VWM), and 165V maximum clamping voltage (VC) at 9.5A peak impulse current. It protects automotive power rails and industrial I/O interfaces against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE120A datasheet, 1.5KE120A pinout, 1.5KE120A application, or 1.5KE120A equivalent, this page delivers verified electrical parameters, DO-201 terminal polarity mapping, AEC-Q101 qualification status, clamping performance under 10/1000μs surge, and real-world protection use cases for 12V–48V systems.
Technical Context
The 1.5KE120A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 114–126V breakdown range. Its low dynamic impedance ensures rapid clamping response (<1.0ps from 0V to VBR), limiting transient energy delivered to downstream circuitry.
It sustains 1500W non-repetitive peak pulse power per 10/1000μs waveform, derates linearly above 25°C ambient, and maintains <1μA leakage at 102V VWM - critical for low-power standby circuits. Junction temperature range is –55°C to +175°C, supporting under-hood automotive deployment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1mA | 114V min / 126V max - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 102V - maximum continuous reverse operating voltage before leakage exceeds 1μA |
| VC @ IPP = 9.5A | 165V - clamped voltage during full 1500W surge, limiting stress on protected ICs |
| PPK | 1500W - peak pulse power handling capability per JEDEC standard 10/1000μs waveform |
| IPP | 9.5A - peak impulse current corresponding to VC = 165V, used for PCB trace sizing |
| TJ max | +175°C - enables operation in high-temperature environments like engine control units |
| Leakage ID @ VWM | <1μA - ensures minimal quiescent current draw in always-on automotive modules |
Pinout & Package
Package: DO-201 axial leaded case with cathode band marking. Leads are pure tin plated, solderable per J-STD-002; meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path / low-side reference | Connected to system ground or lower-potential rail; carries forward surge current up to 200A (IFSM) |
| Cathode | Transient clamping node / high-side input | Connected to protected line (e.g., 12V battery rail); blocks >102V, avalanches above 114V to clamp |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| 10/1000μs 1500W surge rating | Meets ISO 7637-2 Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (EFT) |
| Clamping voltage ≤165V at 9.5A | Ensures protected 12V/24V logic ICs (e.g., CAN transceivers, microcontrollers) remain below absolute maximum ratings |
| Response time <1.0ps | Activates faster than most semiconductor switching events, preventing voltage overshoot propagation |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: 12V battery line in engine control unit exposed to load dump pulses up to 120V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input. Use Value: Clamps transients to ≤165V within 1ps, preventing damage to 36V-rated buck controller and preserving ASIL-B compliance. |
Use Scenario: 24V digital input channel in programmable logic controller subject to EFT bursts per IEC 61000-4-4. IC Role / Device Role / Timing Role: Front-end protection device on optocoupler input side. Use Value: Limits coupled noise to <165V, maintaining signal integrity and enabling >10k cycles of reliable field operation. |
| LED Driver Overvoltage Suppression | Telecom Power Supply Surge Protection |
Use Scenario: Constant-current LED driver board powered from 48V telecom supply experiencing lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping element across input capacitor terminals. Use Value: Absorbs 1500W surge without degradation, eliminating need for secondary crowbar circuits and reducing BOM count. |
Use Scenario: -48V DC power feed in base station equipment subjected to induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Bidirectional-capable variant not applicable; 1.5KE120A used in unidirectional configuration with series fuse. Use Value: Provides repeatable clamping at 165V with <1μA leakage, ensuring no impact on -48V regulation accuracy during normal operation. |
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 SMAJ120A | Same DO-214AC (SMA) package; 120V VBR (114–126V), 165V VC @ 9.5A, but rated 400W (not 1500W) | Lower surge rating limits use to sub-100W systems; unsuitable for ISO 7637-2 Pulse 1 compliance | Select only for space-constrained designs where 1500W surge is not required and SMA footprint is preferred |
| ON Semiconductor 1.5KE120A | Identical electrical specs and DO-201 package; same AEC-Q101 qualification level and ISO 7637-2 compliance | No functional difference; validated drop-in replacement with identical thermal and mechanical behavior | Preferred for dual-sourcing strategies in automotive programs requiring second-source assurance |
Compared with Littelfuse SMAJ120A, the 1.5KE120A delivers 3.75× higher surge power handling essential for automotive load dump; versus ON Semiconductor's 1.5KE120A, it offers identical performance with Taiwan Semiconductor's extended production continuity and regional logistics advantages.
Availability
1.5KE120A is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, LED driver power inputs, and telecom power supplies requiring stable component supply with AEC-Q101 qualification and ISO 7637-2 compliance.
Supply support for 1.5KE120A 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 was designed specifically for high-energy transient suppression in harsh environments - emphasizing AEC-Q101 qualification, 1500W surge robustness, and DO-201 mechanical reliability for under-hood and factory-floor applications.
FAQ
What is the breakdown voltage tolerance of the 1.5KE120A?
The 1.5KE120A has a guaranteed breakdown voltage range of 114V to 126V at 1mA test current, representing ±5% tolerance around the nominal 120V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports predictable system-level overvoltage margining in automotive and industrial designs.
Is the 1.5KE120A suitable for bidirectional transient protection?
No - the 1.5KE120A is a unidirectional TVS diode intended for DC line protection with defined anode/cathode polarity. For bidirectional AC or floating-line applications, use the 1.5KE120CA variant, which provides symmetrical clamping in both directions and is marked with a "C" or "CA" suffix per datasheet ordering codes.
Does the 1.5KE120A meet AEC-Q101 requirements?
Yes - the 1.5KE120A is explicitly AEC-Q101 qualified per the manufacturer's documentation, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and electrostatic discharge (ESD) per the AEC-Q101-004 standard, making it approved for automotive powertrain and chassis applications.
What is the maximum clamping voltage of the 1.5KE120A under surge conditions?
The 1.5KE120A exhibits a maximum clamping voltage (VC) of 165V at 9.5A peak impulse current, measured under the standardized 10/1000μs double-exponential surge waveform. This value is guaranteed across temperature and lifetime, forming the basis for downstream IC voltage margining in protected circuits.
How does the 1.5KE120A compare to the 1.5KE120 in terms of electrical performance?
The 1.5KE120A offers tighter VBR tolerance (114–126V vs. 108–132V for 1.5KE120) and higher VWM (102V vs. 97.2V), resulting in improved system noise immunity and reduced leakage current. Both share identical DO-201 packaging, 1500W PPK rating, and AEC-Q101 qualification, but the "A" suffix denotes enhanced parametric consistency.
1.5KE120A 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 102V
- Voltage - Breakdown (Min):
- 114V
- Voltage - Clamping (Max) @ Ipp:
- 165V
- Current - Peak Pulse (10/1000µs):
- 9.5A
- 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-201
1.5KE120A FAQ
1.How can I place an order for 1.5KE120A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE120A 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 1.5KE120A reliable?
The price and inventory of 1.5KE120A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE120A is usually 5 days.
3.What payment methods are accepted for 1.5KE120A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE120A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE120A?
1.5KE120A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE120A 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 1.5KE120A?
For technical support, including 1.5KE120A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE120A requirements.
6.How does Aetrix verify that 1.5KE120A is sourced from the original manufacturer or authorized distributors?
All 1.5KE120A 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 1.5KE120A meets industry standards.
7.What is the process for return or replacement of 1.5KE120A?
All 1.5KE120A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE120A, 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 1.5KE120A part is unused and in its original packaging.
Return procedure for 1.5KE120A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE120A Tags
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