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Taiwan Semiconductor Corporation 1.5KE24A
- Part No.:
- 1.5KE24A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE24A.pdf
- Description:
- TVS 1500W 24V 5% UNIDIR DO-201
- Quantity:
- Payment:
- Shipping:
Inventory:3,379
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Product details
Overview
1.5KE24A from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode with a nominal breakdown voltage of 24V, minimum VBR of 22.8V at 1.0mA test current, maximum clamping voltage VC of 33.2V at 47A peak pulse current, and DO-201 axial package. It protects automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE24A datasheet, 1.5KE24A pinout, 1.5KE24A application, or 1.5KE24A equivalent, this page delivers verified electrical parameters, clamping performance under 10/1000μs surge, thermal derating behavior, AEC-Q101 qualification status, and real-world ESD/inductive switching protection use cases - all specific to the 1.5KE24A variant.
Technical Context
The 1.5KE24A operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 22.8–25.2V breakdown range. Its low dynamic impedance and sub-1ps response time enable rapid clamping of fast transients before downstream ICs are damaged.
It sustains 1500W non-repetitive peak pulse power per 10/1000μs waveform, with thermal derating above 25°C ambient and junction temperature limits up to +175°C. The device exhibits <1μA leakage at 20.5V working stand-off voltage and 3.5V forward voltage at 50A surge current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1.0mA | 22.8V min / 25.2V max - defines precise avalanche initiation threshold for reliable overvoltage detection |
| VWM | 20.5V - maximum continuous reverse operating voltage; ensures no conduction during normal 24V rail operation |
| VC @ IPP = 47A | 33.2V - clamped voltage during full 1500W surge; determines protected circuit's maximum transient exposure level |
| PPK | 1500W - peak pulse power handling capability at 10/1000μs; validates robustness against automotive load dump and inductive spikes |
| IPP | 47A - peak impulse current capacity; sets minimum trace width and fuse coordination requirements in PCB layout |
| TJ max | +175°C - maximum junction temperature; supports operation in under-hood automotive environments without thermal shutdown |
| Package | DO-201 - industry-standard axial leaded package with tin-plated leads; compatible with wave soldering and manual rework |
Pinout & Package
DO-201 package: axial-leaded, cylindrical epoxy body with cathode band marking. Cathode terminal is marked by a colored band; anode is unmarked end. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current path / low-side reference node | Connected to ground or low-voltage return; establishes reference for clamping action during reverse surge |
| Cathode | Transient voltage sensing / high-side connection | Connected to protected line (e.g., 24V supply); conducts avalanche current to anode when VAK > VBR |
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 | Withstands repetitive load dump events in 12V/24V vehicle systems without degradation |
| Clamping ratio VC/VBR = 1.31 | Low ratio indicates efficient energy diversion; reduces stress on downstream DC-DC converters and microcontrollers |
| Leakage current ≤1μA @ 20.5V | Minimizes standby power loss in always-on automotive modules such as body control units |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (switching noise) immunity requirements |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: 24V battery-fed ECUs exposed to load dump and alternator ripple in commercial vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24V supply and ground to clamp transients before they reach LDOs and CAN transceivers. Use Value: Limits voltage to ≤33.2V during 1500W surges, preventing latch-up or gate oxide damage in 3.3V/5V logic ICs downstream. |
Use Scenario: Digital input channels on programmable logic controllers receiving 24V sensor signals in factory automation. IC Role / Device Role / Timing Role: Front-end transient suppressor on each discrete input channel to absorb EFT bursts and relay contact bounce energy. Use Value: Maintains signal integrity by suppressing >1kV EFT pulses within 1ps, avoiding false triggering of optocouplers or Schmitt triggers. |
| LED Driver Overvoltage Clamp | Motor Drive Gate Driver Protection |
Use Scenario: Constant-current LED drivers in outdoor lighting subjected to lightning-induced surges on AC mains or 24V DC bus. IC Role / Device Role / Timing Role: Parallel-connected TVS across driver output to shunt surge current away from sensitive current-sense amplifiers and MOSFETs. Use Value: Clamps 10/1000μs transients to 33.2V, protecting 40V-rated buck controller ICs and enabling use of lower-voltage, cost-optimized FETs. |
Use Scenario: Half-bridge gate drivers controlling 24V BLDC motors in power tools, where back-EMF spikes exceed rated VDS. IC Role / Device Role / Timing Role: TVS placed across high-side gate resistor or bootstrap capacitor to clamp Miller-induced voltage overshoot. Use Value: Prevents gate oxide breakdown in 30V-rated driver ICs by limiting transient excursions to 33.2V, extending system lifetime under repeated motor stall conditions. |
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 | 600W rating, SMC package, 38.9V clamping at 15.7A IPP; lower surge capacity but smaller footprint | Preferred for space-constrained PCBs where 1500W margin is not required; unsuitable for ISO 7637-2 Pulse 1 load dump | Select SMBJ24A only when board area is critical and peak surge energy is ≤600W; verify thermal dissipation in SMC vs. DO-201 |
| 1N6280A (JEDEC equivalent) | Identical electrical specs and DO-201 package; same VBR, VC, PPK, and AEC-Q101 qualification per Taiwan Semiconductor documentation | No functional difference; used interchangeably in BOMs where JEDEC nomenclature is mandated | 1N6280A is a direct JEDEC-designated equivalent; no design change or validation needed when substituting for 1.5KE24A |
Compared with SMBJ24A, the 1.5KE24A delivers 2.5× higher surge power handling and proven ISO 7637-2 compliance, making it essential for automotive front-end protection; compared with 1N6280A, it is functionally identical - differing only in branding and orderable part number convention.
Availability
1.5KE24A is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, LED lighting systems, and motor drive designs requiring stable component supply with AEC-Q101 assurance and 1500W transient immunity.
Supply support for 1.5KE24A 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, specializing in TVS diodes, rectifiers, and power devices since 1979.
The 1.5KE series was designed specifically for high-energy transient suppression in automotive and industrial power systems, emphasizing AEC-Q101 reliability, tight VBR tolerance, and consistent clamping performance across temperature.
FAQ
What is the exact breakdown voltage range of the 1.5KE24A?
The 1.5KE24A has a guaranteed breakdown voltage range of 22.8V to 25.2V at 1.0mA test current (VBR min/max), measured per ANSI/IEEE C62.35. This narrow 10% tolerance ensures predictable clamping onset across production lots and temperature extremes, critical for protecting 24V system ICs without premature conduction.
Is the 1.5KE24A suitable for bidirectional transient protection?
No - the 1.5KE24A is a unidirectional TVS diode, intended for DC circuits with defined polarity like 24V automotive supplies. For bidirectional protection (e.g., AC lines or data buses), use the bipolar 1.5KE24CA variant. Using 1.5KE24A in reverse-biased AC applications risks catastrophic failure due to lack of forward conduction path.
Does the 1.5KE24A meet AEC-Q101 requirements?
Yes - the 1.5KE24A is explicitly AEC-Q101 qualified per Taiwan Semiconductor's O2104 specification document. It passes stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per JS-001, confirming suitability for under-hood automotive applications without additional qualification effort.
What is the maximum clamping voltage of the 1.5KE24A during a 10/1000μs surge?
The 1.5KE24A clamps to a maximum of 33.2V at 47A peak pulse current (IPP) under the standard 10/1000μs waveform. This value is measured and guaranteed - not typical - ensuring downstream 36V-rated components remain within safe operating area even during worst-case surge events.
How does the 1.5KE24A compare to the 1.5KE24 variant?
The 1.5KE24A offers tighter VBR tolerance (22.8–25.2V) versus 1.5KE24 (21.6–26.4V), resulting in more consistent clamping behavior and reduced risk of nuisance tripping. Both share identical DO-201 packaging, 1500W rating, and thermal specs, but the "A" suffix denotes enhanced parameter grading for precision-sensitive designs.
1.5KE24A 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):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 47A
- 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
1.5KE24A FAQ
1.How can I place an order for 1.5KE24A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE24A 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 1.5KE24A reliable?
The price and inventory of 1.5KE24A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE24A is usually 5 days.
3.What payment methods are accepted for 1.5KE24A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE24A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE24A?
1.5KE24A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE24A 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 1.5KE24A?
For technical support, including 1.5KE24A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE24A requirements.
6.How does Aetrix verify that 1.5KE24A is sourced from the original manufacturer or authorized distributors?
All 1.5KE24A 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 1.5KE24A meets industry standards.
7.What is the process for return or replacement of 1.5KE24A?
All 1.5KE24A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE24A, 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 1.5KE24A part is unused and in its original packaging.
Return procedure for 1.5KE24A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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