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Taiwan Semiconductor Corporation 1.5KE56A
- Part No.:
- 1.5KE56A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE56A.pdf
- Description:
- TVS 1500W 56V 5% UNIDIR DO-201
- Quantity:
- Payment:
- Shipping:
Inventory:2,398
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Product details
Overview
1.5KE56A from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a nominal breakdown voltage of 56 V, a working stand-off voltage of 47.8 V, clamps transients to ≤77.0 V at 20 A peak pulse current, and operates within -55°C to +175°C junction temperature range - deployed in automotive power supply inputs and industrial PLC I/O modules.
For engineers reviewing the 1.5KE56A datasheet, 1.5KE56A pinout, 1.5KE56A application, or 1.5KE56A equivalent, key selection criteria include its DO-201 package compatibility, unidirectional polarity marking, 1.0 mA test current specification, low leakage (<1 µA above 10 V), and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive ESD and load-dump immunity.
Technical Context
The 1.5KE56A implements a silicon avalanche diode structure optimized for fast clamping response (<1.0 ps from 0 V to VBR) and low dynamic impedance. Its unidirectional configuration enables asymmetric protection with cathode-band polarity marking and supports forward surge current up to 200 A (8.3 ms half-sine).
It operates under JEDEC-standardized 10/1000 µs surge waveform conditions, delivering 1500 W peak pulse power at TA = 25°C and derating linearly above that ambient. Thermal performance is validated for mounting on 0.6" × 0.6" copper pads, with steady-state power dissipation rated at 5 W at TL = 75°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1.0 mA | 53.2–58.8 V - Ensures reliable avalanche initiation within ±5% tolerance at standard test current |
| VWM | 47.8 V - Maximum continuous DC or RMS voltage the device blocks without conduction |
| VC @ IPP = 20 A | ≤77.0 V - Clamped voltage during 10/1000 µs surge, limiting downstream IC stress |
| PPK | 1500 W - Peak transient energy absorption capability per single non-repetitive event |
| IFSM | 200 A - Withstands 8.3 ms half-sine forward surge, critical for inductive load switching |
| Junction Temp Range | -55°C to +175°C - Enables deployment in under-hood automotive and industrial environments |
| Leakage @ VWM | <1 µA - Minimizes standby power loss and avoids false triggering in high-impedance circuits |
Pinout & Package
Package: DO-201 axial-leaded plastic case with pure tin-plated leads (J-STD-002 compliant), polarity indicated by cathode band, weight ≈ 0.090 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or return path; defines unidirectional clamping direction |
| Cathode | High-side protected node | Connected to line being protected; avalanche conduction occurs when cathode-to-anode voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option available | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Clamping ratio (VC/VBR) | ≤1.45 - Low overvoltage margin ensures robust protection of 56 V-rated systems |
| Response time | <1.0 ps - Sub-picosecond turn-on minimizes voltage overshoot during ESD events |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance stabilization) |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| Automotive Power Input Protection | Industrial PLC Digital I/O Protection |
|---|---|
|
Use Scenario: 12 V battery-fed ECUs exposed to load dump (up to 35 V) and jump-start surges (up to 24 V). IC Role / Device Role / Timing Role: Primary clamping element placed upstream of DC-DC converters and LDO regulators. Use Value: Limits input voltage to ≤77.0 V during 10/1000 µs transients, preventing damage to 40 V-rated input stages. |
Use Scenario: 24 V digital input channels in programmable logic controllers subject to field-wiring ESD and inductive kickback. IC Role / Device Role / Timing Role: Standoff protection device mounted at connector entry point before optocoupler or Schmitt trigger input. Use Value: Blocks >47.8 V transients while maintaining <1 µA leakage, preserving signal integrity and noise margin. |
| LED Driver Supply Rail Protection | Telecom Line Interface Protection |
|
Use Scenario: Constant-current LED drivers powered from 48 V telecom or PoE-derived supplies experiencing cable-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input capacitor and controller IC VCC pin. Use Value: Absorbs 1500 W surges without degradation, enabling single-device protection for 56 V nominal bus designs. |
Use Scenario: RS-485 transceivers connected to long outdoor cables susceptible to lightning-induced surges. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), handling residual fast-rising transients. Use Value: Fast <1.0 ps response complements slower GDTs, reducing let-through voltage to safe levels for 56 V-rated transceivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ56A | DO-214AA package, 600 W rating, VBR = 62.2–68.8 V, VC = 93.6 V @ 6.4 A | Lower power handling and higher clamping voltage limit suitability to lower-energy interfaces only | Select SMBJ56A only where board space constraints prohibit DO-201 and surge energy remains below 600 W |
| 1N6289A | Same manufacturer, identical electrical specs and DO-201 package - JEDEC type number for 1.5KE56A | No functional difference; used interchangeably in BOMs and procurement | 1N6289A is a direct JEDEC-equivalent part number and may be substituted without design change |
Compared with 1.5KE56A, SMBJ56A offers surface-mount compatibility but sacrifices 60% peak power capacity and increases clamping voltage by 21.5 V, whereas 1N6289A provides identical protection performance in the same through-hole form factor and qualifies as a drop-in replacement.
Availability
1.5KE56A is available at Aetrix Electronics and suitable for automotive ECU power inputs, industrial PLC I/O modules, and LED driver supply rails requiring stable component supply across extended temperature and high-surge environments.
Supply support for 1.5KE56A 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 developed specifically for high-energy transient suppression in harsh-environment applications, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust DO-201 packaging for under-hood and factory-floor deployment.
FAQ
What is the maximum clamping voltage of the 1.5KE56A under standard test conditions?
The 1.5KE56A exhibits a maximum clamping voltage (VC) of 77.0 V when subjected to a 10/1000 µs surge waveform at IPP = 20 A. This value is measured per JEDEC standards and guarantees predictable overvoltage limiting for downstream 56 V-rated circuitry. The 1.5KE56A maintains this clamping performance across its full operating temperature range and is validated in production test flow.
Is the 1.5KE56A suitable for bidirectional transient protection?
No, the 1.5KE56A is a unidirectional TVS diode, indicated by its cathode band marking and specified VBR and VC values for forward-biased avalanche operation only. For bidirectional protection, Taiwan Semiconductor offers the 1.5KE56CA variant - a separate part with symmetrical breakdown in both polarities. Using the 1.5KE56A in reverse-biased AC applications risks permanent failure due to lack of reverse avalanche rating.
What does the "A" suffix in 1.5KE56A signify?
The "A" suffix in 1.5KE56A denotes tighter parameter tolerances: VBR is specified as 53.2–58.8 V (±5%) versus 50.4–61.6 V (±10%) for the base 1.5KE56. This improves consistency in clamping behavior across production lots and simplifies margin analysis in safety-critical designs. The 1.5KE56A also carries the same DO-201 package, thermal ratings, and surge capability as the non-A version.
Can the 1.5KE56A replace the older 1N6289 in existing designs?
Yes, the 1.5KE56A is the modern commercial designation for the JEDEC-standardized 1N6289A, sharing identical electrical specifications, DO-201 package dimensions, pinout, and thermal characteristics. Taiwan Semiconductor documents full interchangeability in its ordering information, confirming no PCB layout or schematic changes are required when migrating from 1N6289A to 1.5KE56A.
How does the 1.5KE56A perform under elevated ambient temperatures?
The 1.5KE56A's peak pulse power rating de-rates linearly above TA = 25°C per Figure 2 in the official datasheet: at 75°C ambient, it retains ~75% of its 1500 W rating (~1125 W), and at 125°C, ~45% (~675 W). This derating is based on thermal resistance from junction-to-ambient in the DO-201 package and must be accounted for in thermally constrained enclosures or high-temperature deployments.
1.5KE56A 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):
- 47.8V
- Voltage - Breakdown (Min):
- 53.2V
- Voltage - Clamping (Max) @ Ipp:
- 77V
- Current - Peak Pulse (10/1000µs):
- 20A
- 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
1.5KE56A FAQ
1.How can I place an order for 1.5KE56A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE56A 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 1.5KE56A reliable?
The price and inventory of 1.5KE56A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE56A is usually 5 days.
3.What payment methods are accepted for 1.5KE56A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE56A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE56A?
1.5KE56A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE56A 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 1.5KE56A?
For technical support, including 1.5KE56A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE56A requirements.
6.How does Aetrix verify that 1.5KE56A is sourced from the original manufacturer or authorized distributors?
All 1.5KE56A 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 1.5KE56A meets industry standards.
7.What is the process for return or replacement of 1.5KE56A?
All 1.5KE56A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE56A, 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 1.5KE56A part is unused and in its original packaging.
Return procedure for 1.5KE56A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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