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Taiwan Semiconductor Corporation 1V5KE20CA
- Part No.:
- 1V5KE20CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1V5KE20CA.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:4,990
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Product details
Overview
1V5KE20CA from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It features a 19.0–21.0 V breakdown voltage (VBR), 17.1 V reverse stand-off voltage (VRWM), 27.7 V clamping voltage (VC) at 54.2 A peak pulse current, and 1500 W peak pulse power capability per 1.0 ms waveform - deployed in automotive body electronics, industrial I/O protection, and telecom interface circuits.
For engineers reviewing the 1V5KE20CA datasheet, 1V5KE20CA pinout, 1V5KE20CA application, or 1V5KE20CA equivalent, key selection criteria include its DO-201 package compatibility, bipolar clamping symmetry, low leakage (<1 µA above 10 V), fast response time, and compliance with IEC 61000-4-2/4-4/4-5 ESD/EFT/surge immunity requirements.
Technical Context
The 1V5KE20CA operates as a silicon avalanche diode with glass-passivated junction, enabling bidirectional clamping without polarity sensitivity. Its electrical behavior is defined by a precise 19.0–21.0 V breakdown range at 1 mA test current and a maximum clamping voltage of 27.7 V at 54.2 A (10/1000 µs waveform), ensuring predictable overvoltage limiting under transient stress.
Thermal performance is characterized by a 175 °C maximum junction temperature and 5 W steady-state power dissipation at 75 °C ambient with 0.375-inch lead length. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability standards, supporting reliable long-term operation in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 19.0 V / 21.0 V - defines minimum and maximum voltage at which avalanche conduction begins reliably at 1 mA test current |
| VRWM | 17.1 V - maximum continuous reverse operating voltage before significant leakage onset |
| VC @ IPPM | 27.7 V at 54.2 A - clamped voltage during 10/1000 µs surge, determining protected circuit's worst-case overvoltage exposure |
| PPPM | 1500 W - peak pulse power handling capacity for 1.0 ms, defining surge energy absorption limit |
| IR @ VRWM | <1 µA - ensures negligible standby current draw in powered-down or low-power states |
| TJ(max) | 175 °C - maximum allowable junction temperature, guiding thermal design margin for PCB layout and heatsinking |
| Package | DO-201 - industry-standard axial-leaded package with 0.090 g mass, UL 94V-0 molding compound, and pure tin-plated leads |
Pinout & Package
1V5KE20CA is housed in a DO-201 axial package with two terminals: anode and cathode. Polarity is marked by a cathode band on the body for unidirectional variants; however, the "CA" suffix denotes bidirectional construction - both terminals are functionally symmetric and interchangeable in circuit placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Surge current entry point in negative transients | Accepts reverse-polarity surges; clamps to cathode when voltage exceeds VBR in either direction |
| Cathode (banded end) | Surge current entry point in positive transients | Accepts positive-polarity surges; clamps to anode when voltage exceeds VBR in either direction |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress |
| 1500 W peak pulse power (1 ms) | Supports robust protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges on 24 V industrial buses |
| Bidirectional clamping symmetry | Eliminates need for polarity-aware placement - simplifies layout and reduces BOM count in AC-coupled or floating systems |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD, inductive kickback), improving system immunity margin |
| RoHS & halogen-free compliance | Fulfills environmental compliance requirements for global industrial and automotive supply chains per IEC 61249-2-21 |
Applications
| Industrial PLC Analog Input Protection | Automotive Body Control Module (BCM) Power Line |
|---|---|
Use Scenario: Protecting 0–10 V analog sensor inputs from induced surges on factory floor wiring. IC Role / Device Role: Primary overvoltage clamp placed across input terminals ahead of precision op-amp front-end. Use Value: Limits transient excursions to ≤27.7 V, preserving ADC reference integrity and preventing op-amp saturation or latch-up. | Use Scenario: Safeguarding 12 V supply rail feeding microcontroller and CAN transceivers in door module. IC Role / Device Role: Bidirectional TVS connected between VCC and GND to absorb load dump and jump-start spikes. Use Value: Clamps 12 V rail to ≤27.7 V during ISO 7637-2 Pulse 5a (load dump), preventing brownout or reset events. |
| Telecom Ethernet PHY Interface | Smart Meter RS-485 Communication Port |
Use Scenario: Shielding 10/100BASE-TX transformer-coupled PHY pins from lightning-induced surges on outdoor cabling. IC Role / Device Role: Secondary-level protection placed after gas discharge tube (GDT) on MDI side of magnetics. Use Value: Provides low-clamping secondary stage (27.7 V) to protect PHY ICs rated for 3.3 V I/O with ±15 kV ESD tolerance. | Use Scenario: Securing half-duplex RS-485 transceiver bus lines against EFT bursts and capacitive coupling in utility meter enclosures. IC Role / Device Role: Bidirectional TVS on A/B differential pair, referenced to local ground plane. Use Value: Maintains signal integrity by clamping common-mode transients to ≤27.7 V while adding <1 pF capacitance, avoiding data rate degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20CA (Bourns) | Same VRWM (17.1 V), identical DO-214AA package, but lower PPPM (600 W) and higher VC (32.4 V) | Limited to lower-energy transients (IEC 61000-4-2 ±8 kV contact only); unsuitable for IEC 61000-4-5 Level 4 | Select when space-constrained SMT layout is required and surge energy is ≤600 W |
| 1N6278A (ON Semiconductor) | Identical electrical specs (VBR, VRWM, VC, PPPM) and DO-201 package; same JEDEC type designation | No functional difference - direct second-source alternative with identical qualification and test flow | Preferred for dual-sourcing strategy where full parametric and mechanical equivalence is required |
Compared with SMBJ20CA and 1N6278A, the 1V5KE20CA delivers full 1500 W surge rating in axial DO-201 form factor - making it optimal for high-reliability industrial and automotive applications where legacy through-hole assembly or higher energy margins are mandated.
Availability
1V5KE20CA is available at Aetrix Electronics and suitable for industrial PLC analog input protection, automotive BCM power line safeguarding, and smart meter RS-485 communication port hardening requiring stable component supply and long-lifecycle support.
Supply support for 1V5KE20CA 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 ISO 9001 and IATF 16949 certification.
The 1V5KE series is engineered specifically for high-energy transient suppression in industrial automation, automotive electronics, and telecom infrastructure - emphasizing ruggedness, repeatable clamping, and compliance with international surge immunity standards.
FAQ
What is the breakdown voltage tolerance of the 1V5KE20CA?
The 1V5KE20CA has a specified breakdown voltage (VBR) range of 19.0 V to 21.0 V at 1 mA test current, representing a ±5% tolerance about the nominal 20 V rating. This tight distribution ensures consistent clamping behavior across production lots and supports reliable system-level surge margin calculations without derating overhead.
Is the 1V5KE20CA suitable for protecting 24 V DC power rails?
Yes, the 1V5KE20CA is well-suited for 24 V DC rail protection: its 17.1 V reverse stand-off voltage (VRWM) provides adequate margin above normal operating voltage, while its 27.7 V clamping voltage limits fault exposure below typical 30 V overvoltage thresholds of downstream regulators and controllers. It meets IEC 61000-4-5 Level 4 requirements for such applications.
Does the 1V5KE20CA require polarity-aware PCB layout?
No - the "CA" suffix confirms the 1V5KE20CA is a bidirectional TVS diode, meaning both terminals are electrically symmetric and function identically under positive or negative transients. No cathode/anode orientation is required during placement, simplifying assembly and eliminating risk of reverse installation in DO-201 axial layouts.
What is the maximum junction temperature rating for the 1V5KE20CA?
The 1V5KE20CA is rated for a maximum junction temperature (TJ) of 175 °C, as specified in its absolute maximum ratings table. This allows operation in high-ambient environments such as engine compartments or enclosed industrial cabinets, provided PCB thermal relief (e.g., copper pour, lead length) maintains junction-to-ambient thermal resistance within safe limits.
How does the 1V5KE20CA compare to unidirectional TVS diodes like 1V5KE20A?
The 1V5KE20CA differs from the unidirectional 1V5KE20A solely in polarity configuration: the "CA" version provides symmetrical clamping in both directions, while the "A" version clamps only in reverse bias and conducts forward current like a rectifier. For AC-coupled, floating, or bidirectional signal lines, the 1V5KE20CA eliminates the need for external polarity management circuitry.
1V5KE20CA 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):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 54.2A
- 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
1V5KE20CA FAQ
1.How can I place an order for 1V5KE20CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1V5KE20CA 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 1V5KE20CA reliable?
The price and inventory of 1V5KE20CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1V5KE20CA is usually 5 days.
3.What payment methods are accepted for 1V5KE20CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1V5KE20CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1V5KE20CA?
1V5KE20CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1V5KE20CA 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 1V5KE20CA?
For technical support, including 1V5KE20CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1V5KE20CA requirements.
6.How does Aetrix verify that 1V5KE20CA is sourced from the original manufacturer or authorized distributors?
All 1V5KE20CA 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 1V5KE20CA meets industry standards.
7.What is the process for return or replacement of 1V5KE20CA?
All 1V5KE20CA units undergo pre-shipment inspection (PSI). If there is an issue with 1V5KE20CA, 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 1V5KE20CA part is unused and in its original packaging.
Return procedure for 1V5KE20CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1V5KE20CA Tags
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