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Taiwan Semiconductor Corporation 1.5KE56CA
- Part No.:
- 1.5KE56CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE56CA.pdf
- Description:
- 1500W, 56V, 5%, BIDIRECTIONAL, T
- Quantity:
- Payment:
- Shipping:
Inventory:5,978
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Product details
Overview
1.5KE56CA from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 56V, working stand-off voltage 45.4V, clamping voltage 80.5V at 19A peak pulse current, and fast response time <5.0ns - designed for automotive and industrial ESD/inductive switching surge protection.
For engineers reviewing the 1.5KE56CA datasheet, 1.5KE56CA pinout, 1.5KE56CA application, or 1.5KE56CA equivalent, this page delivers verified electrical parameters, mechanical packaging details, real-world use scenarios, and validated alternative parts for robust circuit protection design.
Technical Context
The 1.5KE56CA operates as a bidirectional avalanche diode, clamping transients above its breakdown voltage (50.4–61.6V at 1mA test current) while maintaining low dynamic impedance. It meets ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity requirements and supports AEC-Q101 qualification when ordered with 'H' suffix.
Its DO-201 package enables high thermal dissipation (TJ max = 175°C), and it exhibits ≤1μA blocking leakage at 45.4V. The device sustains 1500W non-repetitive peak power at 10/1000μs waveform with clamping voltage tightly specified at 80.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 50.4V / 61.6V - defines reliable conduction onset range under 1mA test current |
| VWM | 45.4V - maximum continuous reverse operating voltage before leakage exceeds 1μA |
| VC @ IPP | 80.5V at 19A - clamping voltage limiting downstream IC stress during 10/1000μs surge |
| PPK | 1500W - peak surge power handling capability per JEDEC standard waveform |
| TJ max | 175°C - junction temperature limit enabling operation in under-hood automotive environments |
| Response time | <5.0ns - ensures suppression before transient energy damages sensitive logic or analog inputs |
| Package | DO-201 - industry-standard axial leaded package with UL 94V-0 molding and tin-plated leads |
Pinout & Package
DO-201 package: axial-leaded, cylindrical epoxy body with cathode band marking for unidirectional variants; 1.5KE56CA is bidirectional and marked without polarity band - both terminals are functionally symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | Bidirectional avalanche junction | Both terminals serve identical clamping roles - no polarity dependency in circuit placement |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection on AC lines or floating buses without polarity constraints |
| 1500W surge rating | Withstands automotive load dump and inductive kick events per ISO 7637-2 |
| Low clamping ratio (VC/VBR) | 1.59 - minimizes overvoltage stress on protected ICs relative to breakdown threshold |
| AEC-Q101 qualified option | Available as 1.5KE56CAH - validated for automotive-grade reliability and temperature cycling |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and environmental compliance for global manufacturing |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN/CAN bus transceivers and microcontrollers from battery line transients during load dump or jump-start. IC Role / Device Role / Timing Role: Bidirectional TVS placed across VCC–GND or signal–GND to clamp surges before they reach IC pins. Use Value: Limits voltage to 80.5V during 19A surge, preventing latch-up or gate oxide damage in 5V/12V systems. | Use Scenario: Safeguarding 4–20mA current loop receivers and ADC front-ends against EFT bursts in factory automation. IC Role / Device Role / Timing Role: Placed across input terminals of isolated signal conditioners to shunt fast transients (<5ns) before propagation. Use Value: Sub-1μA leakage at 45.4V avoids measurement drift; 1500W rating handles repetitive EFT pulses per IEC 61000-4-4. |
| LED Driver Output Protection | Power Supply Input Stage Clamping |
Use Scenario: Shielding constant-current LED drivers from inductive switching spikes generated by relay or MOSFET turn-off. IC Role / Device Role / Timing Role: Connected across driver output and return to absorb stored inductor energy. Use Value: 80.5V clamping prevents overvoltage failure of driver ICs rated for ≤60V absolute maximum. | Use Scenario: Front-end surge suppression on DC input rails of industrial SMPS modules exposed to mains-borne transients. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing line-to-ground surges before bulk capacitor and controller IC. Use Value: 175°C junction rating allows stable operation near hot power components; DO-201 facilitates through-hole mounting on high-current traces. |
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 SMAJ58A | 600W rating, SMA package, VBR = 64.4–71.4V, VC = 93.6V @ 6.4A | Lower power handling; surface-mount only; suited for space-constrained PCBs with lower surge exposure | Select when board area is limited and peak surge energy is ≤600W |
| ON Semiconductor 1.5SMC56CA | Same 1500W rating, SMC package, VBR = 50.4–61.6V, VC = 80.5V @ 19A, but 2.5× smaller footprint | Surface-mount alternative with identical clamping performance; requires rework of layout and thermal relief | Choose for automated assembly and higher density designs where DO-201 lead spacing is incompatible |
Compared with 1.5KE56CA, SMAJ58A offers compact SMD form but halves surge capacity, while 1.5SMC56CA matches all key electrical specs in a smaller SMC package - enabling layout optimization without compromising protection level.
Availability
1.5KE56CA is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, LED driver outputs, and DC power supply input stages requiring stable component supply and long-term obsolescence management.
Supply support for 1.5KE56CA 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs, with global distribution and AEC-Q101 qualified product lines.
The 1.5KE series was developed for high-energy transient suppression in harsh environments - targeting automotive, industrial control, and lighting systems where reliability under repeated surge stress is critical.
FAQ
What is the breakdown voltage range of the 1.5KE56CA?
The 1.5KE56CA has a guaranteed breakdown voltage range of 50.4V to 61.6V at 1mA test current (VBR), measured per ANSI/IEEE C62.35. This range ensures consistent clamping behavior across production lots and temperature extremes, directly supporting design margin calculations for protected circuits.
Is the 1.5KE56CA unidirectional or bidirectional?
The 1.5KE56CA is a bidirectional TVS diode, indicated by the 'CA' suffix. It provides symmetrical clamping in both polarities - essential for protecting AC-coupled signals, floating buses, or differential lines without regard to terminal orientation. Unlike unidirectional 'C' variants, it contains two opposing avalanche junctions.
What does the 'CA' suffix mean in 1.5KE56CA?
The 'CA' suffix in 1.5KE56CA denotes a bidirectional configuration with common anode construction - meaning both terminals behave identically under reverse or forward bias beyond VBR. This distinguishes it from unidirectional 'C' types and confirms its suitability for non-polarized surge paths such as power rail or data line protection.
Can the 1.5KE56CA replace the 1.5KE56A?
No - the 1.5KE56CA and 1.5KE56A are functionally distinct: 1.5KE56A is unidirectional (anode–cathode asymmetry), while 1.5KE56CA is bidirectional. Substituting one for the other risks improper clamping on negative transients or open-circuit behavior. Always verify polarity requirements before replacement.
What is the maximum clamping voltage of the 1.5KE56CA at rated surge current?
The 1.5KE56CA has a maximum clamping voltage (VC) of 80.5V at 19A peak pulse current (IPP) under the standard 10/1000μs waveform. This value is guaranteed across temperature and lot variations, defining the upper voltage limit imposed on protected circuitry during worst-case surge events.
1.5KE56CA 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:
- -
- Bidirectional Channels:
- 1
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE56CA FAQ
1.How can I place an order for 1.5KE56CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE56CA 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 1.5KE56CA reliable?
The price and inventory of 1.5KE56CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE56CA is usually 5 days.
3.What payment methods are accepted for 1.5KE56CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE56CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE56CA?
1.5KE56CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE56CA 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 1.5KE56CA?
For technical support, including 1.5KE56CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE56CA requirements.
6.How does Aetrix verify that 1.5KE56CA is sourced from the original manufacturer or authorized distributors?
All 1.5KE56CA 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 1.5KE56CA meets industry standards.
7.What is the process for return or replacement of 1.5KE56CA?
All 1.5KE56CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE56CA, 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 1.5KE56CA part is unused and in its original packaging.
Return procedure for 1.5KE56CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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