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Taiwan Semiconductor Corporation 1.5KE56C
- Part No.:
- 1.5KE56C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE56C.pdf
- Description:
- 1500W, 56V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:3,363
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Product details
Overview
1.5KE56C from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 56 V, working stand-off voltage 45.4 V, clamping voltage 80.5 V at 19 A peak pulse current, and junction temperature range −55 °C to +175 °C. It protects automotive power electronics and industrial control inputs against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE56C datasheet, 1.5KE56C pinout, 1.5KE56C application, or 1.5KE56C equivalent, this page delivers verified electrical parameters, mechanical packaging details, real-world protection use cases, and validated alternative parts for ESD and surge immunity design.
Technical Context
The 1.5KE56C operates as a unidirectional avalanche diode, triggering at minimum 50.4 V and maximum 61.6 V (VBR @ IT = 1 mA), with low dynamic impedance enabling rapid clamping. Its 10/1000 μs waveform surge rating of 1500 W supports high-energy transient suppression without thermal runaway.
It exhibits <1 μA blocking leakage at 45.4 V (VWM), fast response time (<1.0 ps from 0 V to VBR), and meets AEC-Q101 qualification for automotive under-hood applications. The device is rated for steady-state power dissipation of 5 W at 75 °C lead temperature on 16 mm × 16 mm copper pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min–max) | 50.4–61.6 V @ IT = 1 mA - defines reliable avalanche initiation window for overvoltage detection |
| VWM | 45.4 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA |
| VC @ IPP | 80.5 V @ 19 A - clamped voltage during 10/1000 μs surge, limiting downstream IC stress |
| PPK | 1500 W - peak pulse power handling per single non-repetitive 10/1000 μs transient |
| Junction Temp | −55 °C to +175 °C - enables deployment in engine control units and industrial motor drives |
| Package | DO-201 - industry-standard axial-leaded package with UL 94V-0 molding compound |
Pinout & Package
DO-201 package: axial-leaded, cylindrical epoxy body with cathode band marking. Cathode terminal is marked by band; anode is unmarked end. Leads are pure tin-plated, solderable per J-STD-002, and pass JESD 201 Class 2 whisker test.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased avalanche node | Connected to protected line; conducts when transient exceeds VBR, shunting energy to ground |
| Anode (unmarked end) | Reference/ground return path | Typically tied to system ground or low-impedance return plane to complete clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood environments including thermal cycling, humidity, and vibration stress |
| 1500 W surge capability | Withstands ISO 7637-2 Pulse 1 (inductive load dump) and Pulse 2b (battery disconnect) without failure |
| Clamping voltage ≤80.5 V | Ensures protected 56 V-rated circuits remain below absolute maximum ratings during 19 A transient events |
| Leakage <1 μA @ 45.4 V | Minimizes standby power loss and avoids false triggering in always-on automotive modules |
Applications
| Automotive Power Line Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges before they reach LDOs or microcontrollers. Use Value: Limits peak rail voltage to 80.5 V during 1500 W transients, preserving integrity of 100 V-rated input capacitors and PMICs. | Use Scenario: Shielding digital input terminals of programmable logic controllers from field-wiring induced EFT bursts. IC Role / Device Role / Timing Role: Front-end transient suppressor on dry-contact or 24 V DC input channels exposed to relay switching noise. Use Value: Sub-1 ns response ensures clamping occurs before 5 ns EFT edges propagate into optocoupler or Schmitt-trigger input stages. |
| LED Driver Overvoltage Clamp | Motor Drive Gate Driver Protection |
Use Scenario: Safeguarding constant-current LED drivers in streetlight systems against lightning-induced surges on AC mains input. IC Role / Device Role / Timing Role: Parallel-connected TVS across bulk capacitor input to absorb line-to-ground transients before rectifier bridge. Use Value: 1500 W rating handles multi-kV surges while 45.4 V VWM avoids conduction during normal 48 V nominal operation. | Use Scenario: Protecting high-side gate driver ICs in BLDC inverters from shoot-through-inducing voltage spikes during MOSFET switching. IC Role / Device Role / Timing Role: Localized TVS across gate-source terminals of level-shifted drivers to clamp Miller-induced overshoot. Use Value: Low dynamic impedance ensures sub-10 ns clamping, preventing unintended turn-on of power FETs during dV/dt events. |
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 | DO-214AC (SMA) package, 58 V VBR, 93.6 V VC @ 16.7 A, 400 W PPK | Lower surge rating limits use to lower-energy IEC 61000-4-5 Level 3 or EFT-only scenarios | Select when board space constraints favor surface-mount or when 400 W surge margin suffices |
| ON Semiconductor 1.5SMC56C | SMB package, same 56 V nominal, 80.5 V VC @ 18.7 A, but 1500 W rating and RoHS/halogen-free compliant | Same clamping performance but smaller footprint; requires re-layout due to different pad geometry | Choose for space-constrained PCBs where DO-201 axial leads are impractical |
Compared with 1.5KE56C, SMAJ58A offers surface-mount convenience but sacrifices 60% surge capacity, while 1.5SMC56C matches key electrical specs in a compact SMB outline-both require layout revision and do not offer drop-in replacement capability.
Availability
1.5KE56C is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC input hardening, LED driver surge resilience, and motor drive gate driver safeguarding requiring stable component supply across extended production lifecycles.
Supply support for 1.5KE56C 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 headquartered in Hsinchu, Taiwan, specializing in discrete power devices, TVS diodes, rectifiers, and thyristors for industrial and automotive markets.
The 1.5KE series was designed specifically for high-energy transient suppression in harsh environments-emphasizing robustness, AEC-Q101 compliance, and consistent clamping performance across temperature and lifetime.
FAQ
What is the breakdown voltage tolerance of the 1.5KE56C?
The 1.5KE56C has a guaranteed breakdown voltage range of 50.4 V to 61.6 V at 1 mA test current (VBR min/max), corresponding to ±10% tolerance around the nominal 56 V rating. This window ensures predictable clamping onset across manufacturing lots and temperature extremes, critical for designing reliable overvoltage thresholds in automotive power rails.
Is the 1.5KE56C suitable for bidirectional transient protection?
No, the 1.5KE56C is a unidirectional TVS diode, indicated by the "C" suffix and cathode band marking. For bidirectional protection, Taiwan Semiconductor offers the 1.5KE56CA variant. Using 1.5KE56C in AC-coupled or bipolar signal paths risks forward conduction and failure; always verify polarity alignment in circuit schematics before placing 1.5KE56C.
What is the maximum clamping voltage of the 1.5KE56C under surge conditions?
The 1.5KE56C clamps to a maximum of 80.5 V when subjected to its rated 19 A peak pulse current (IPP) under the standard 10/1000 μs waveform. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuitry during worst-case transients, directly informing downstream component voltage derating requirements.
Does the 1.5KE56C meet automotive qualification standards?
Yes, the 1.5KE56C is AEC-Q101 qualified, confirming reliability for automotive applications including under-hood environments. It passes stress tests for temperature cycling, humidity, mechanical shock, and high-temperature operating life. Note that AEC-Q101 qualification applies only to parts ordered with the "H" suffix (e.g., 1.5KE56CH); standard 1.5KE56C may not carry full qualification unless explicitly specified by Taiwan Semiconductor's ordering code.
How does the 1.5KE56C compare to the 1.5KE56A variant?
The 1.5KE56A has tighter VBR tolerance (53.2–58.8 V vs. 50.4–61.6 V for 1.5KE56C), resulting in higher minimum breakdown voltage and slightly lower clamping voltage (77.0 V vs. 80.5 V). Both share identical DO-201 package, 1500 W rating, and thermal specs. Choose 1.5KE56A when precise threshold control is needed; 1.5KE56C offers broader tolerance for cost-sensitive, high-volume automotive applications.
1.5KE56C 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):
- 45.4V
- Voltage - Breakdown (Min):
- 50.4V
- Voltage - Clamping (Max) @ Ipp:
- 80.5V
- Current - Peak Pulse (10/1000µs):
- 19A
- 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
1.5KE56C FAQ
1.How can I place an order for 1.5KE56C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE56C 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 1.5KE56C reliable?
The price and inventory of 1.5KE56C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE56C is usually 5 days.
3.What payment methods are accepted for 1.5KE56C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE56C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE56C?
1.5KE56C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE56C 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 1.5KE56C?
For technical support, including 1.5KE56C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE56C requirements.
6.How does Aetrix verify that 1.5KE56C is sourced from the original manufacturer or authorized distributors?
All 1.5KE56C 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 1.5KE56C meets industry standards.
7.What is the process for return or replacement of 1.5KE56C?
All 1.5KE56C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE56C, 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 1.5KE56C part is unused and in its original packaging.
Return procedure for 1.5KE56C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE56C Tags
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