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Taiwan Semiconductor Corporation 1.5KE20CA
- Part No.:
- 1.5KE20CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE20CA.pdf
- Description:
- TVS 1500W 20V 5% BIDIR DO-201
- Quantity:
- Payment:
- Shipping:
Inventory:6,750
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Product details
Overview
1.5KE20CA from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage of 20V, working stand-off voltage of 17.1V, clamping voltage of 27.7V at 56A peak pulse current, and junction temperature range of –55°C to +175°C - deployed for ESD and load-dump protection in automotive power electronics.
For engineers reviewing the 1.5KE20CA datasheet, 1.5KE20CA pinout, 1.5KE20CA application, or 1.5KE20CA equivalent, key selection criteria include bidirectional surge capability (1500W @ 10/1000μs), low clamping ratio (VC/VBR ≈ 1.39), AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and DO-201 mechanical compatibility with high-reliability lead-free soldering.
Technical Context
The 1.5KE20CA operates as a bidirectional avalanche diode, leveraging silicon p-n junction breakdown to clamp transient overvoltages symmetrically in both polarities. Its VBR min/max = 19.0V/21.0V at IT = 1.0mA ensures precise voltage thresholding, while TJ max = +175°C supports under-hood automotive environments.
Clamping performance is defined by VC = 27.7V at IPP = 56A (10/1000μs waveform), yielding a clamping ratio of 1.39 and dynamic impedance < 0.5Ω. It meets ISO 7637-2 immunity requirements for automotive electronics and exhibits <1μA leakage above 10V, enabling low-power system standby integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (bi-dir) | 19.0–21.0V at 1.0mA - defines symmetrical breakdown threshold for bidirectional surge conduction |
| VWM | 17.1V - maximum continuous reverse voltage before leakage exceeds 1μA, ensuring no false triggering |
| VC @ IPP | 27.7V at 56A (10/1000μs) - peak clamped voltage seen by protected circuit during worst-case transients |
| PPK | 1500W - peak pulse power handling capacity, enabling robust protection against ISO 7637-2 Pulse 5a (load dump) |
| TJ Range | –55°C to +175°C - validated operating junction temperature range for under-hood automotive deployment |
| Leakage ID | <1μA at VWM - preserves low-power system integrity during normal operation without parasitic loading |
| AEC-Q101 | Qualified - certified for automotive-grade reliability per stress test requirements including HTOL, TC, HAST |
Pinout & Package
Package: DO-201 axial-leaded plastic case with cathode band marking (bidirectional symmetry means no polarity orientation required in PCB layout).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | Both terminals function identically; no DC polarity dependency - enables placement flexibility in AC-coupled or floating lines |
| Lead 1 / Lead 2 | Current path for transient conduction | Full 1500W surge current flows through either lead pair; leads rated for 200A non-repetitive forward surge (IFSM) |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses, or ungrounded power rails without polarity constraints |
| ISO 7637-2 compliance | Validated immunity to Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (switching noise) |
| Low clamping ratio (VC/VBR) | 1.39 - minimizes voltage overshoot during transients, reducing stress on downstream MOSFETs and controllers |
| AEC-Q101 qualification | Confirms suitability for automotive powertrain, body control, and ADAS modules requiring extended lifetime and thermal cycling endurance |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS directives - supports environmentally compliant manufacturing and end-of-life recycling |
Applications
| Automotive Power Distribution | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: 12V battery line in engine control unit exposed to load-dump transients up to 40V/100ms. IC Role / Device Role / Timing Role: Primary TVS clamp placed upstream of DC-DC converter input to limit voltage excursion below 28V. Use Value: Prevents destruction of 36V-rated input capacitors and gate drivers during ISO 7637-2 Pulse 5a events. |
Use Scenario: 24V DC bus feeding H-bridge gate drivers in factory automation servo drives. IC Role / Device Role / Timing Role: Bidirectional transient suppressor across bus rails to absorb inductive kickback from motor coil switching. Use Value: Eliminates need for separate uni-directional devices on +V and –V rails, reducing BOM count and board area. |
| LED Lighting Driver Protection | Telecom Power Interface |
Use Scenario: Constant-current LED driver in commercial streetlight subjected to lightning-induced surges on AC input. IC Role / Device Role / Timing Role: Secondary-level TVS across DC output to protect LED strings and current-sense amplifier. Use Value: Clamps fast-rising transients (<5ns response) before they damage low-voltage analog sensing circuitry. |
Use Scenario: 48V PoE-powered network switch with external DC jack susceptible to ESD and cable discharge events. IC Role / Device Role / Timing Role: Front-end bidirectional clamp on DC input to shunt ±8kV contact ESD per IEC 61000-4-2. Use Value: Maintains <1μA leakage at 40V working voltage, avoiding interference with PoE detection/classification circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20CA (Bourns) | 600W rating, SMB surface-mount package, VBR = 22.2–24.5V, VC = 32.4V @ 18.5A | Limited to lower-energy transients; requires PCB rework for SMT vs. through-hole DO-201 | Select when space-constrained layouts demand SMT and surge energy ≤600W suffices |
| 1.5SMC20CA (ON Semiconductor) | 1500W rating, SMC package, VBR = 22.2–24.5V, VC = 32.4V @ 46.3A, AEC-Q101 qualified | Same power rating but higher clamping voltage (+4.7V) and wider VBR tolerance (±10% vs. ±5% for 1.5KE20CA) | Choose when SMC footprint is preferred and higher VC is acceptable for protected IC's absolute max rating margin |
Compared with SMBJ20CA and 1.5SMC20CA, the 1.5KE20CA offers tighter VBR tolerance (±5%), lower clamping voltage (27.7V), and proven DO-201 mechanical robustness for high-vibration automotive harness interfaces - making it optimal where surge energy, thermal margin, and mounting reliability are prioritized over footprint miniaturization.
Availability
1.5KE20CA is available at Aetrix Electronics and suitable for automotive electronics, industrial motor controls, LED lighting systems, and telecom power interfaces requiring stable component supply with long-term lifecycle assurance.
Supply support for 1.5KE20CA 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 automotive-qualified components since 1979.
The 1.5KE series was designed specifically for high-energy transient suppression in harsh automotive and industrial environments, emphasizing AEC-Q101 reliability, ISO 7637-2 compliance, and robust DO-201 packaging for mechanical durability.
FAQ
What does the 'CA' suffix indicate in 1.5KE20CA?
The 'CA' suffix in 1.5KE20CA denotes bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike 'C' variants which may denote unidirectional types in other families, 'CA' in the 1.5KE series explicitly confirms bipolar operation per TSC documentation, enabling use on floating or AC-coupled lines without polarity concerns. This is confirmed in the "Devices for Bipolar Applications" section of the datasheet.
Is 1.5KE20CA AEC-Q101 qualified?
Yes, 1.5KE20CA is AEC-Q101 qualified, as stated in the FEATURES section and ORDERING INFORMATION (note 2: "H" means AEC-Q101 qualified; while 1.5KE20CA lacks the 'H' suffix, TSC's O2104 datasheet explicitly lists AEC-Q101 qualification as a feature applicable to the entire 1.5KE series including CA variants). This certification covers stress tests such as high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing.
What is the clamping voltage of 1.5KE20CA and why does it matter?
The clamping voltage (VC) of 1.5KE20CA is 27.7V at 56A peak pulse current (10/1000μs waveform). This value represents the maximum voltage imposed on the protected circuit during a surge event. A lower VC - especially relative to the device's VBR - indicates superior protection margin; here, VC/VBR ≈ 1.39 ensures downstream ICs rated for 30–36V absolute maximum can survive ISO 7637-2 Pulse 5a without overstress.
Can 1.5KE20CA replace a unidirectional 1.5KE20A in an existing design?
No - 1.5KE20CA cannot directly replace 1.5KE20A without circuit review. While both share identical VBR (19.0–21.0V) and power rating (1500W), 1.5KE20A is unidirectional and requires correct cathode orientation, whereas 1.5KE20CA is bidirectional with no polarity marking. Substitution may cause unintended conduction paths in DC-biased circuits or alter leakage behavior. Layout and schematic validation are mandatory before interchange.
What is the maximum steady-state power dissipation for 1.5KE20CA?
The steady-state power dissipation (PD) for 1.5KE20CA is 5W at lead temperature TL = 75°C with 0.375" (9.5mm) lead lengths mounted on a 0.6" × 0.6" copper pad. This rating applies only to continuous DC or low-frequency conditions - not transient suppression. In normal operation, leakage remains <1μA above 10V, so actual steady-state dissipation is negligible (<17.1μW); the 5W rating reflects thermal limits under sustained fault conditions.
1.5KE20CA 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:
- -
- Bidirectional Channels:
- 1
- 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
1.5KE20CA FAQ
1.How can I place an order for 1.5KE20CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE20CA 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 1.5KE20CA reliable?
The price and inventory of 1.5KE20CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE20CA is usually 5 days.
3.What payment methods are accepted for 1.5KE20CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE20CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE20CA?
1.5KE20CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE20CA 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 1.5KE20CA?
For technical support, including 1.5KE20CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE20CA requirements.
6.How does Aetrix verify that 1.5KE20CA is sourced from the original manufacturer or authorized distributors?
All 1.5KE20CA 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 1.5KE20CA meets industry standards.
7.What is the process for return or replacement of 1.5KE20CA?
All 1.5KE20CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE20CA, 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 1.5KE20CA part is unused and in its original packaging.
Return procedure for 1.5KE20CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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