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Taiwan Semiconductor Corporation 1V5KE24A
- Part No.:
- 1V5KE24A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1V5KE24A.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:3,221
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Product details
Overview
1V5KE24A 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 22.8–25.2V at 1mA test current, reverse stand-off voltage 20.5V, and clamping voltage 33.2V at 45.2A peak pulse current. It protects power rails and I/O lines in industrial power supplies and motor drives.
For engineers reviewing the 1V5KE24A datasheet, 1V5KE24A pinout, 1V5KE24A application, or 1V5KE24A equivalent, key selection criteria include unidirectional polarity, DO-201 mechanical compatibility, 175°C max junction temperature, low incremental surge resistance, and sub-1μA leakage above 10V.
Technical Context
The 1V5KE24A operates as a silicon avalanche diode that enters controlled breakdown during voltage transients exceeding its reverse stand-off voltage (VRWM = 20.5V), clamping the line to ≤33.2V at 45.2A. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
Designed for single-polarity DC protection, it features fast response time (<1ns), low dynamic impedance, and meets JEDEC JESD201 Class 2 whisker resistance. It is not rated for bidirectional use unless specified with "C" suffix (e.g., 1V5KE24CA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (1ms) | 1500W - sustains high-energy ESD/EFT surges without failure |
| Breakdown Voltage VBR | 22.8–25.2V @ 1mA - defines precise avalanche onset threshold |
| Reverse Stand-off Voltage VRWM | 20.5V - maximum continuous DC voltage before leakage rises significantly |
| Clamping Voltage VC | 33.2V @ 45.2A - limits protected circuit voltage during worst-case surge |
| Peak Pulse Current IPPM | 45.2A - maximum non-destructive surge current under 10/1000μs waveform |
| Junction Temperature Range | −55°C to +175°C - supports operation in harsh industrial environments |
| Leakage Current IR | <1μA @ VRWM - negligible standby power loss in battery-powered systems |
Pinout & Package
Package: DO-201 axial leaded case with cathode band marking; RoHS-compliant, halogen-free molding compound; UL 94V-0 rated; pure tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lower-potential rail in unidirectional clamp configuration |
| Cathode | High-side surge input terminal | Connected to protected line; cathode band identifies polarity for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift |
| 1500W peak pulse rating | Withstands IEC 61000-4-5 Level 4 (4kV, 2Ω coupling) surges without degradation |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., inductive switch-off) |
| Fast response time | Sub-nanosecond turn-on enables protection of high-speed interfaces and microcontroller I/O |
| RoHS & halogen-free compliance | Fulfills environmental requirements for industrial and automotive end equipment |
Applications
| Industrial Motor Drives | Programmable Logic Controllers (PLCs) |
|---|---|
Use Scenario: Protection of gate driver supply rails against inductive kickback from IGBT/MOSFET switching. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VDD and GND to clamp voltage spikes below IC absolute maximum ratings. Use Value: Prevents latch-up or permanent damage to isolated gate drivers operating at 24V nominal bus voltage. | Use Scenario: Input/output module protection against field-wiring transients and lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge suppression on 24V DC sensor/actuator channels before signal conditioning circuitry. Use Value: Maintains system uptime by preventing false triggering or reset events caused by >1kV EFT bursts. |
| DC Power Supplies | Building Automation Systems |
Use Scenario: Secondary-side overvoltage protection on 24V output rails of AC/DC converters. IC Role / Device Role / Timing Role: Standoff-clamp device across output capacitor to limit transient excursions during load dump or regulation fault. Use Value: Limits output overshoot to ≤33.2V, safeguarding downstream DC-DC converters and microcontrollers. | Use Scenario: Surge protection on RS-485 communication lines powering HVAC controllers and sensors. IC Role / Device Role / Timing Role: Line-to-ground TVS on differential pair to absorb common-mode transients while preserving signal integrity. Use Value: Enables reliable operation in electrically noisy environments without requiring additional isolation components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A | DO-214AA package; 600W rating; lower IPPM (33.3A); same VRWM (20.5V) and VC (38.9V) | Suitable for space-constrained PCBs but limited to lower-energy transients | Select when board area is critical and surge threat level is ≤IEC 61000-4-5 Level 3 |
| 1N6280A | Same manufacturer, identical electrical specs and DO-201 package; legacy JEDEC part number | No functional difference; used interchangeably in legacy designs | Prefer 1V5KE24A for new designs due to updated process and halogen-free compliance |
Compared with SMBJ24A and 1N6280A, the 1V5KE24A delivers higher surge robustness (1500W vs. 600W) in the same axial footprint, while offering modern environmental compliance absent in the legacy 1N6280A - making it optimal for new industrial power and control designs requiring long-term supply stability.
Availability
1V5KE24A is available at Aetrix Electronics and suitable for industrial motor drives, programmable logic controllers (PLCs), and DC power supplies requiring stable component supply, long-lifecycle support, and consistent surge performance across production batches.
Supply support for 1V5KE24A 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 industrial, computing, and consumer markets since 1979.
The 1V5KE series belongs to TSC's high-power TVS diode product line, engineered specifically for robust, cost-effective transient protection in industrial-grade power conversion and control systems where reliability under repeated surge stress is mandatory.
FAQ
What is the polarity configuration of the 1V5KE24A?
The 1V5KE24A is a unidirectional TVS diode, meaning it conducts only in reverse bias during overvoltage events. Its cathode is marked by a band on the DO-201 body and must be connected to the protected line, while the anode connects to ground. It is not rated for bidirectional operation unless ordered as 1V5KE24CA.
Does the 1V5KE24A meet IEC 61000-4-5 surge immunity standards?
Yes, the 1V5KE24A's 1500W peak pulse rating at 1.0ms corresponds to IEC 61000-4-5 Level 4 (4kV, 2Ω source impedance) for line-to-ground surges. When properly mounted with short traces and adequate PCB copper, it provides validated protection for industrial equipment meeting this standard.
What is the maximum clamping voltage of the 1V5KE24A under surge conditions?
The 1V5KE24A has a maximum clamping voltage (VC) of 33.2V at 45.2A peak pulse current (IPPM), measured under the standard 10/1000μs double-exponential waveform. This value defines the upper voltage limit imposed on the protected circuit during worst-case transient events.
Can the 1V5KE24A replace the older 1N6280A in existing designs?
Yes, the 1V5KE24A is a direct replacement for 1N6280A - same DO-201 package, identical electrical specifications, and improved manufacturing process. No PCB or schematic changes are required, and it offers enhanced RoHS and halogen-free compliance for new production runs.
What is the thermal derating behavior of the 1V5KE24A above 75°C ambient?
At ambient temperatures above 75°C, the 1V5KE24A's steady-state power dissipation derates linearly from 5W down to zero at 175°C junction temperature. The derating curve is defined in Fig.5 of the datasheet, and design margin must account for both ambient temperature and internal self-heating during sustained surge duty cycles.
1V5KE24A 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):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 45.2A
- 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
1V5KE24A FAQ
1.How can I place an order for 1V5KE24A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1V5KE24A 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 1V5KE24A reliable?
The price and inventory of 1V5KE24A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1V5KE24A is usually 5 days.
3.What payment methods are accepted for 1V5KE24A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1V5KE24A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1V5KE24A?
1V5KE24A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1V5KE24A 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 1V5KE24A?
For technical support, including 1V5KE24A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1V5KE24A requirements.
6.How does Aetrix verify that 1V5KE24A is sourced from the original manufacturer or authorized distributors?
All 1V5KE24A 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 1V5KE24A meets industry standards.
7.What is the process for return or replacement of 1V5KE24A?
All 1V5KE24A units undergo pre-shipment inspection (PSI). If there is an issue with 1V5KE24A, 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 1V5KE24A part is unused and in its original packaging.
Return procedure for 1V5KE24A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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