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Taiwan Semiconductor Corporation 1.5KE300A
- Part No.:
- 1.5KE300A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE300A.pdf
- Description:
- TVS DIODE 256VWM 414VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:5,135
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Product details
Overview
1.5KE300A from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 300V, clamping voltage 414V at 3.8A peak impulse current, and working stand-off voltage 256V. It protects automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE300A datasheet, 1.5KE300A pinout, 1.5KE300A application, or 1.5KE300A equivalent, this page delivers verified electrical specs, mechanical data, real-world protection use cases, and validated alternative parts for high-voltage surge suppression design.
Technical Context
The 1.5KE300A operates as a unidirectional avalanche diode, triggering at VBR = 285–315V (tested at 1mA), clamping transients to ≤414V at IPP = 3.8A under 10/1000μs waveform. Its low dynamic impedance and <1.0ps response time ensure rapid voltage limiting during fast-rising EFT or load-dump events.
Rated for TJ = –55°C to +175°C, it sustains 5W steady-state dissipation on 16mm × 16mm copper pad and meets AEC-Q101 qualification when ordered with "H" suffix. Polarity is marked by cathode band; leads are pure tin-plated per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 285V / 315V - Ensures reliable conduction onset above 256V working voltage while avoiding false triggering. |
| VWM | 256V - Maximum continuous DC or RMS voltage the device blocks without leakage exceeding 1μA. |
| VC @ IPP | 414V @ 3.8A - Clamped voltage seen by protected circuit during full 1500W surge, defining downstream voltage stress. |
| PPK | 1500W - Peak pulse power handling capability per 10/1000μs waveform, enabling robust load-dump immunity. |
| IFSM | 200A - Single half-sine surge current rating (8.3ms), supporting high-energy inductive switching events. |
| TJ max | +175°C - Junction temperature limit allowing operation in under-hood automotive environments. |
| Package | DO-201 - Standard axial-leaded package with UL 94V-0 molding compound and JESD201 Class 2 whisker resistance. |
Pinout & Package
DO-201 package: axial-leaded, polarity indicated by cathode band (cathode end). Leads are pure tin-plated, solderable per J-STD-002. Weight ≈0.090g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-impedance return path; defines clamping reference point for unidirectional operation. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 24V rail); conducts avalanche current to anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 1500W peak pulse power | Supports ISO 7637-2 Pulse 5a (load dump) up to 35V system voltage with margin. |
| <1.0ps response time (unidirectional) | Clamps sub-nanosecond ESD/EFT transients before sensitive ICs experience overstress. |
| ≤1μA leakage @ VWM | Minimizes standby power loss in always-on 24V/48V systems without compromising protection sensitivity. |
| AEC-Q101 qualified option | Validated for automotive powertrain and chassis applications requiring extended temperature and reliability validation. |
| Halogen-free & RoHS compliant | Fulfills IPC/JEDEC environmental compliance requirements for industrial and transportation end equipment. |
Applications
| Automotive Load-Dump Protection | Industrial 24V/48V Power Rail Protection |
|---|---|
Use Scenario: Suppressing 120V/350V load-dump transients on vehicle alternator output lines per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and ECUs or power modules. Use Value: Limits voltage to ≤414V during 1500W surge, preventing MOSFET gate oxide rupture and MCU brownout in engine control units. |
Use Scenario: Protecting PLC I/O modules and motor drives from inductive kickback and lightning-induced surges on 24V/48V DC distribution buses. IC Role / Device Role / Timing Role: Primary overvoltage clamp at power entry point, upstream of DC-DC converters and microcontrollers. Use Value: Absorbs 3.8A peak impulse current while holding downstream nodes below 420V, preserving isolation barrier integrity and sensor accuracy. |
| LED Streetlight Driver Protection | Telecom Power Supply Input Stage |
Use Scenario: Safeguarding constant-current LED drivers from grid-switching transients and capacitor discharge spikes in outdoor lighting systems. IC Role / Device Role / Timing Role: High-energy TVS on primary-side DC bus (300–400V range) before PFC stage. Use Value: Withstands repeated 10/1000μs surges up to 1500W without degradation, extending driver lifetime in harsh utility environments. |
Use Scenario: Front-end transient suppression on -48V telecom rectifier outputs exposed to hot-swap and cable discharge events. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to negative rail, protecting DC-DC controllers and PMBus interfaces. Use Value: Delivers 256V working voltage standoff with 414V clamping-compatible with -48V system derating and meeting GR-1089-CORE Level 3 immunity. |
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 SMAJ300A | Same DO-214AC (SMA) package; lower PPK = 400W; VC = 488V @ 3.1A; higher VWM = 256V identical. | Not suitable for 1500W load-dump; limited to lower-energy ESD/EFT in space-constrained layouts. | Select only if board area is critical and surge energy is ≤400W; verify clamping margin against downstream BVDSS. |
| ON Semiconductor 1N6298A | Same DO-201 package; identical VBR (285–315V), VWM (256V), VC (414V), and PPK (1500W); AEC-Q101 qualified as standard. | Direct functional match with automotive-grade qualification built-in; no "H" suffix required. | Preferred for new automotive designs requiring certified reliability; same footprint and electrical behavior as 1.5KE300A. |
Compared with 1.5KE300A, SMAJ300A trades surge capacity for compactness, while 1N6298A matches all key ratings and adds factory AEC-Q101 validation-making it a drop-in upgrade for automotive programs needing pre-qualified components.
Availability
1.5KE300A is available at Aetrix Electronics and suitable for automotive load-dump protection, industrial 24V/48V power rail hardening, and LED driver surge suppression requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE300A 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 automotive, industrial, and consumer markets since 1979.
The 1.5KE series was designed specifically for high-energy transient suppression in automotive and industrial power systems, emphasizing rugged DO-201 packaging, AEC-Q101 qualification paths, and precise clamping performance across 6.8V–440V voltage grades.
FAQ
What is the maximum clamping voltage of the 1.5KE300A under standard test conditions?
The 1.5KE300A exhibits a maximum clamping voltage (VC) of 414V when subjected to its rated peak impulse current of 3.8A under the 10/1000μs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during a full 1500W transient event. The 1.5KE300A maintains this clamping performance consistently across its operational temperature range.
Is the 1.5KE300A suitable for bidirectional transient suppression?
No, the 1.5KE300A is a unidirectional TVS diode, intended for DC circuits where polarity is fixed-such as 24V/48V automotive rails or LED driver inputs. For bidirectional AC or dual-polarity applications, the 1.5KE300CA variant must be used. The 1.5KE300A's cathode band marking and forward voltage specification (VF = 5.0V max) confirm its unidirectional architecture.
What is the working stand-off voltage (VWM) of the 1.5KE300A, and why does it matter?
The 1.5KE300A has a working stand-off voltage (VWM) of 256V, meaning it remains in high-impedance blocking mode up to this DC or RMS voltage with leakage current ≤1μA. This parameter ensures the 1.5KE300A does not interfere with normal operation of 240–270V DC systems-such as telecom rectifiers or industrial HVDC links-while remaining ready to clamp transients exceeding 285V.
Does the 1.5KE300A meet automotive qualification standards?
The base 1.5KE300A is not AEC-Q101 qualified; however, Taiwan Semiconductor offers the 1.5KE300AH variant (with "H" suffix) that is fully AEC-Q101 qualified for stress testing including temperature cycling, humidity bias, and high-temperature operating life. Designers targeting automotive powertrain or body electronics should specify 1.5KE300AH to meet OEM reliability requirements.
How does the 1.5KE300A compare to the 1.5KE300 in terms of electrical performance?
The 1.5KE300A offers tighter breakdown voltage tolerance (285–315V) versus the 1.5KE300 (270–330V), resulting in more predictable clamping onset and reduced risk of premature conduction. Both share identical package (DO-201), peak power (1500W), and clamping voltage (414V), but the "A" grade improves VBR consistency-critical for designs with narrow voltage margins downstream of the 1.5KE300A.
1.5KE300A 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):
- 256V
- Voltage - Breakdown (Min):
- 285V
- Voltage - Clamping (Max) @ Ipp:
- 414V
- Current - Peak Pulse (10/1000µs):
- 3.8A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE300A FAQ
1.How can I place an order for 1.5KE300A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE300A 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 1.5KE300A reliable?
The price and inventory of 1.5KE300A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE300A is usually 5 days.
3.What payment methods are accepted for 1.5KE300A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE300A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE300A?
1.5KE300A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE300A 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 1.5KE300A?
For technical support, including 1.5KE300A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE300A requirements.
6.How does Aetrix verify that 1.5KE300A is sourced from the original manufacturer or authorized distributors?
All 1.5KE300A 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 1.5KE300A meets industry standards.
7.What is the process for return or replacement of 1.5KE300A?
All 1.5KE300A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE300A, 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 1.5KE300A part is unused and in its original packaging.
Return procedure for 1.5KE300A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE300A Tags
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