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Taiwan Semiconductor Corporation 1.5KE47A
- Part No.:
- 1.5KE47A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE47A.pdf
- Description:
- TVS 1500W 47.1V 5% UNIDIR DO-201
- Quantity:
- Payment:
- Shipping:
Inventory:2,925
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Product details
Overview
1.5KE47A from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with 47V nominal breakdown voltage, 44.7–49.4V VBR @ 1.0mA, 40.2V working stand-off voltage (VWM), and 64.8V clamping voltage (VC) at 24A peak pulse current - used for automotive load-dump and inductive switching protection in power supply inputs.
For engineers reviewing the 1.5KE47A datasheet, 1.5KE47A pinout, 1.5KE47A application, or 1.5KE47A equivalent, key selection criteria include unidirectional polarity, DO-201 mechanical compatibility, 175°C junction rating, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and AEC-Q101 qualification status (denoted by "H" suffix in ordering code).
Technical Context
The 1.5KE47A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 44.7–49.4V breakdown range at 1.0mA test current. It clamps transients to ≤64.8V at 24A (10/1000μs waveform), with <1μA leakage above 40.2V and <1.0ps response time from 0V to VBR.
Designed for high-energy surge suppression, it sustains 1500W non-repetitive peak power per JEDEC standard, derates linearly above 25°C ambient, and supports steady-state dissipation of 5W at 75°C lead temperature on 16mm×16mm copper pad - requiring no external bias or control circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=1.0mA | 44.7–49.4V - defines precise avalanche initiation threshold under standardized test condition |
| VWM | 40.2V - maximum continuous reverse voltage before significant leakage begins |
| VC @ IPP=24A | 64.8V - clamped voltage during 10/1000μs surge, limiting downstream IC stress |
| PPK | 1500W - peak single-pulse power handling capability per JEDEC test waveform |
| TJMAX | 175°C - maximum junction temperature enabling operation in under-hood automotive environments |
| IFSM | 200A - peak forward surge current tolerance for unidirectional devices only |
| Leakage ID @ VWM | <1μA - ensures minimal standby power loss in always-on systems |
Pinout & Package
Package: DO-201 axial-leaded plastic case with cathode band marking; 0.090g mass; UL 94V-0 rated molding compound; pure tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side in unidirectional TVS configuration; carries full surge current during forward conduction events |
| Cathode (banded end) | Avalanche clamping terminal | Connected to protected line; initiates breakdown when reverse voltage exceeds VBR; determines polarity-sensitive placement on PCB |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified variant available | Meets automotive-grade reliability requirements including temperature cycling, HTRB, and ESD testing - critical for engine control and body electronics |
| 1500W surge capability (10/1000μs) | Withstands high-energy transients such as ISO 7637-2 Pulse 5a (load dump) without degradation |
| Clamping voltage ≤64.8V at 24A | Ensures protected ICs experience voltage stress well below absolute maximum ratings during surge events |
| Response time <1.0ps (0V to VBR) | Engages faster than most semiconductor switches or controllers, preventing damage before system-level protection reacts |
| RoHS & halogen-free (IEC 61249-2-21) | Complies with global environmental regulations and enables use in consumer and industrial products with strict material restrictions |
Applications
| Automotive Power Input Protection | Industrial DC Power Rail Clamping |
|---|---|
Use Scenario: 12V battery-fed ECUs exposed to load-dump transients up to 120V for 400ms per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp surges before they reach LDOs or microcontrollers. Use Value: Limits voltage to ≤64.8V during 24A surge, protecting downstream 75V-rated input stages and avoiding latch-up or gate oxide rupture. | Use Scenario: 48V telecom power supplies subjected to inductive switching spikes from relay or solenoid drivers. IC Role / Device Role / Timing Role: Primary surge shunt on main DC bus, positioned upstream of DC-DC converters and monitoring ICs. Use Value: Absorbs 1500W pulses without failure, maintaining system uptime and eliminating need for redundant clamping stages. |
| LED Driver Overvoltage Suppression | Motor Control Board Transient Isolation |
Use Scenario: Constant-current LED drivers in streetlight systems experiencing lightning-induced surges on long outdoor wiring. IC Role / Device Role / Timing Role: Standoff protector across driver input terminals, activated only during overvoltage events exceeding 40.2V. Use Value: Blocks >40.2V transients while drawing <1μA at normal operating voltage, preserving driver efficiency and thermal budget. | Use Scenario: H-bridge motor controllers encountering back-EMF spikes during rapid PWM commutation or emergency stop. IC Role / Device Role / Timing Role: Bidirectional-capable variant not applicable; 1.5KE47A used in unidirectional configuration across low-side FET source-to-ground path. Use Value: Clamps negative-going spikes to safe levels before they exceed gate-source breakdown limits of MOSFETs. |
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 SMAJ47A | Same DO-214AC (SMA) package; 47V nominal; VC = 76.0V @ 19.3A; PPK = 400W | Lower peak power rating limits use to sub-1kW surge environments; smaller footprint but higher thermal resistance | Select when board space is constrained and surge energy is ≤400W; verify layout thermal relief for 5W steady-state dissipation |
| ON Semiconductor 1.5SMC47A | DO-214AB (SMC) package; same 47V rating; VC = 70.1V @ 21.4A; PPK = 1500W; AEC-Q101 qualified | Surface-mount alternative with identical surge rating but different thermal path and mounting method | Choose for automated SMT assembly; requires re-evaluation of PCB copper area and thermal vias vs. DO-201 through-hole leads |
Compared with 1.5KE47A, SMAJ47A offers space savings at reduced surge capacity, while 1.5SMC47A matches 1500W performance in SMT form - both require package-specific layout validation and do not provide drop-in replacement without mechanical redesign.
Availability
1.5KE47A is available at Aetrix Electronics and suitable for automotive electronics, industrial power supplies, LED lighting systems, and motor control circuits requiring stable component supply with AEC-Q101 traceability and long-term lifecycle support.
Supply support for 1.5KE47A 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 device manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and power semiconductors since 1979.
The 1.5KE series was developed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing robustness against ISO 7637-2 pulses, wide temperature operation, and consistent clamping performance across production lots.
FAQ
What is the polarity configuration of the 1.5KE47A?
The 1.5KE47A is a unidirectional TVS diode, with cathode marked by a band on the DO-201 package. It conducts in forward bias like a standard diode and clamps reverse transients above its 44.7–49.4V breakdown range. Unlike bidirectional variants (e.g., 1.5KE47CA), it does not suppress positive-going surges on the anode side - correct orientation is essential for functional protection.
Does the 1.5KE47A meet AEC-Q101 qualification?
The base 1.5KE47A part number is not inherently AEC-Q101 qualified; qualification applies only to versions with "H" suffix (e.g., 1.5KE47AH). Per TSC's ordering information, "H" denotes AEC-Q101 compliance - confirm ordering code includes "H" if automotive-grade reliability is required. Standard 1.5KE47A meets industrial specifications but lacks certified automotive test data.
What is the maximum clamping voltage of the 1.5KE47A under surge conditions?
The 1.5KE47A has a maximum clamping voltage (VC) of 64.8V at 24A peak pulse current (10/1000μs waveform), as specified in TSC's electrical characteristics table. This value represents worst-case clamping performance across process variation and temperature extremes - design margins must account for this upper limit when selecting downstream IC voltage ratings.
Can the 1.5KE47A be used in bidirectional surge protection applications?
No - the 1.5KE47A is strictly unidirectional and unsuitable for bidirectional protection. For symmetrical transient suppression (e.g., data lines or AC inputs), select a bidirectional variant such as 1.5KE47CA, which provides matched clamping in both polarities. Using 1.5KE47A in reverse-biased configurations risks permanent failure due to lack of forward conduction path during positive surges.
How does the 1.5KE47A's thermal performance compare to surface-mount alternatives?
The 1.5KE47A in DO-201 package relies on lead conduction for heat dissipation, achieving 5W steady-state power at 75°C lead temperature on a 16mm×16mm copper pad. Surface-mount equivalents like 1.5SMC47A use PCB copper area more efficiently but require careful thermal via placement - DO-201 offers superior mechanical robustness and higher surge survivability in vibration-prone environments, albeit with larger footprint.
1.5KE47A 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):
- 40.2V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.8V
- Current - Peak Pulse (10/1000µs):
- 24A
- 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
1.5KE47A FAQ
1.How can I place an order for 1.5KE47A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE47A 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 1.5KE47A reliable?
The price and inventory of 1.5KE47A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE47A is usually 5 days.
3.What payment methods are accepted for 1.5KE47A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE47A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE47A?
1.5KE47A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE47A 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 1.5KE47A?
For technical support, including 1.5KE47A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE47A requirements.
6.How does Aetrix verify that 1.5KE47A is sourced from the original manufacturer or authorized distributors?
All 1.5KE47A 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 1.5KE47A meets industry standards.
7.What is the process for return or replacement of 1.5KE47A?
All 1.5KE47A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE47A, 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 1.5KE47A part is unused and in its original packaging.
Return procedure for 1.5KE47A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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