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Taiwan Semiconductor Corporation 1.5KE20A
- Part No.:
- 1.5KE20A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE20A.pdf
- Description:
- TVS 1500W 20V 5% UNIDIR DO-201
- Quantity:
- Payment:
- Shipping:
Inventory:5,119
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Product details
Overview
1.5KE20A from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode with a nominal breakdown voltage of 20V, VBR range 19.0–21.0V at 1.0mA test current, VWM = 17.1V, and clamping voltage VC = 27.7V at 56A peak impulse current - designed for automotive and industrial power rail protection against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE20A datasheet, 1.5KE20A pinout, 1.5KE20A application, or 1.5KE20A equivalent, this page delivers verified electrical parameters, DO-201 package details, clamping performance under 10/1000μs surge, low leakage (<1μA @ 17.1V), and AEC-Q101-qualified alternatives for robust ESD and inductive switching protection.
Technical Context
The 1.5KE20A operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 19.0–21.0V breakdown threshold to clamp transients within nanoseconds. Its 1500W peak pulse power rating applies at TA = 25°C with derating above that temperature per Fig.2, and it sustains 200A non-repetitive forward surge current for 8.3ms half-sine wave.
It features low dynamic impedance and fast response time (<1.0ps from 0V to VBR), enabling effective suppression of fast-rising EFT and load-dump events. The device meets RoHS and halogen-free standards (IEC 61249-2-21), with pure tin-plated leads compliant to J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1.0mA | 19.0–21.0V - precise avalanche initiation window ensures reliable turn-on before system damage occurs |
| VWM | 17.1V - maximum continuous reverse operating voltage; must exceed circuit's normal DC rail by ≥10% margin |
| VC @ IPP = 56A | 27.7V - clamped voltage during 10/1000μs surge; defines worst-case overvoltage seen by downstream ICs |
| PPK | 1500W - peak pulse power handling capability at 25°C; derates linearly to ~500W at 100°C ambient |
| IPP | 56A - maximum non-repetitive peak impulse current; determines minimum trace width and fuse coordination |
| IR @ VWM | <1μA - ultra-low leakage preserves battery life in always-on automotive modules and sensor nodes |
| TJ max | +175°C - high junction temperature rating supports under-hood placement without thermal derating penalties |
Pinout & Package
Package: DO-201 axial leaded case with cathode band marking; molded compound meets UL 94V-0; weight ≈ 0.090g; polarity indicated by cathode band (cathode = banded end).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground or low-side return path; forms current loop during clamping |
| Cathode | Protected line input | Connected to protected rail (e.g., 12V battery feed); avalanche conduction occurs from cathode to anode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option available | Validated for automotive under-hood use including temperature cycling, humidity bias, and mechanical shock |
| 10/1000μs surge rating | 1500W clamping capacity per ISO 7637-2 Pulse 5a (load dump), enabling single-device protection without parallel staging |
| Clamping ratio VC/VBR | 1.46 (27.7V / 19.0V) - tight ratio minimizes overvoltage stress on downstream MOSFETs and microcontrollers |
| Low dynamic impedance | ~0.19Ω (ΔV/ΔI = (27.7−19.0)V / 56A) - ensures stable clamping across wide current range without voltage runaway |
| Fast response time | <1.0ps rise-to-breakdown - faster than most ESD events (IEC 61000-4-2), preventing latch-up in sensitive analog front-ends |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
|
Use Scenario: 12V battery line in engine control unit exposed to ISO 7637-2 Pulse 5a (load dump up to 60V, 400ms). IC Role / Device Role: Primary overvoltage clamp placed between battery feed and DC-DC converter input. Use Value: Limits transient voltage to ≤27.7V, protecting 36V-rated buck controller and avoiding need for oversized input capacitors. |
Use Scenario: 24V digital input channel in programmable logic controller subjected to inductive kickback from solenoid de-energization. IC Role / Device Role: Front-end TVS on field-side signal conditioning circuit before optocoupler isolation barrier. Use Value: Absorbs 1500W surge energy without degradation, maintaining signal integrity and eliminating false triggers during valve actuation. |
| LED Driver Overvoltage Suppression | ESD-Sensitive Sensor Interface |
|
Use Scenario: Constant-current LED driver board powered from 48V bus in commercial lighting fixture experiencing cable discharge events. IC Role / Device Role: Unidirectional TVS across input terminals to shunt surges before they reach PWM controller and MOSFET gate driver. Use Value: Clamps 10/1000μs transients to 27.7V, preventing gate oxide rupture in 30V-rated driver ICs and extending LED module lifetime. |
Use Scenario: Automotive cabin temperature sensor with long harness run exposed to IEC 61000-4-2 ±8kV contact discharge. IC Role / Device Role: Secondary protection stage after common-mode choke, placed directly at sensor IC supply pins. Use Value: Sub-1μA leakage avoids measurement offset drift; <1.0ps response prevents ESD-induced latch-up in precision analog front-end. |
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 SMAJ20A | Same DO-214AC (SMA) package; lower PPK = 400W; VC = 32.4V @ 12.3A | Not suitable for ISO 7637-2 Pulse 5a; limited to ESD and low-energy EFT | Select only for space-constrained PCBs where 1500W surge is not required |
| Vishay 1.5SMC20A | DO-214AB (SMC) package; same 1500W rating; VC = 28.8V @ 52A; slightly higher leakage (~2.5μA) | Compatible for load-dump protection but requires larger footprint (7.11 × 6.22mm vs. DO-201's 5.3 × 2.7mm length) | Choose when higher thermal mass or JEDEC-standard SMC layout is preferred over axial leads |
Compared with 1.5KE20A, SMAJ20A offers smaller size but insufficient surge capacity for automotive load dump, while 1.5SMC20A matches power rating but demands larger board area and exhibits higher leakage - making 1.5KE20A optimal for cost-sensitive, high-reliability axial-leaded designs requiring full ISO 7637-2 compliance.
Availability
1.5KE20A is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and LED lighting applications requiring stable component supply, AEC-Q101 qualification support, and long-term lifecycle continuity.
Supply support for 1.5KE20A 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, with global distribution and AEC-Q101 certification capabilities.
The 1.5KE series was engineered specifically for high-energy transient suppression in automotive and industrial environments, emphasizing ruggedness, repeatable clamping, and compliance with ISO 7637-2 and IEC 61000-4-5 standards.
FAQ
What is the maximum clamping voltage of the 1.5KE20A under standard test conditions?
The 1.5KE20A has a maximum clamping voltage VC of 27.7V at IPP = 56A using the 10/1000μs waveform. This value is measured per JEDEC standards and represents the peak voltage imposed on the protected circuit during worst-case surge events - critical for verifying compatibility with downstream IC absolute maximum ratings.
Is the 1.5KE20A unidirectional or bidirectional, and how is polarity identified?
The 1.5KE20A is a unidirectional TVS diode, with polarity marked by a cathode band on the DO-201 package. The banded end is the cathode and must be connected to the protected line (e.g., 12V rail), while the anode connects to ground - reverse connection renders the device ineffective for overvoltage protection.
Does the 1.5KE20A meet AEC-Q101 requirements out of the box?
The base 1.5KE20A is not AEC-Q101 qualified; however, the variant 1.5KE20AH (with "H" suffix) is fully AEC-Q101 certified. Engineers specifying automotive applications must select 1.5KE20AH to ensure compliance with stress tests including temperature cycling, high-temperature operating life, and ESD robustness per AEC-Q101 Rev D.
How does the 1.5KE20A compare to the 1.5KE20 in terms of electrical performance?
The 1.5KE20A offers tighter VBR tolerance (19.0–21.0V) versus 1.5KE20 (18.0–22.0V), lower VWM (17.1V vs. 16.2V), and reduced VC (27.7V vs. 29.1V at same IPP). These improvements yield superior clamping accuracy and lower let-through voltage - making 1.5KE20A preferable for noise-sensitive or tightly regulated power domains.
What is the recommended PCB layout practice for the 1.5KE20A in high-surge applications?
For optimal 1.5KE20A performance in 1500W surge scenarios, minimize trace inductance by placing the device directly across the protected rail and ground with short, wide copper pours (≥2mm width). Avoid vias in the main current path; use thermal relief only on ground side; and ensure ≥1.5mm clearance to adjacent traces to prevent arcing during clamping.
1.5KE20A 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):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 56A
- 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
1.5KE20A FAQ
1.How can I place an order for 1.5KE20A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE20A 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 1.5KE20A reliable?
The price and inventory of 1.5KE20A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE20A is usually 5 days.
3.What payment methods are accepted for 1.5KE20A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE20A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE20A?
1.5KE20A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE20A 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 1.5KE20A?
For technical support, including 1.5KE20A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE20A requirements.
6.How does Aetrix verify that 1.5KE20A is sourced from the original manufacturer or authorized distributors?
All 1.5KE20A 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 1.5KE20A meets industry standards.
7.What is the process for return or replacement of 1.5KE20A?
All 1.5KE20A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE20A, 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 1.5KE20A part is unused and in its original packaging.
Return procedure for 1.5KE20A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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