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Taiwan Semiconductor Corporation P4KE56CA
- Part No.:
- P4KE56CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE56CA.pdf
- Description:
- TVS DIODE 47.8VWM 77VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:3,922
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Product details
Overview
P4KE56CA from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal paths. It features a 56V nominal breakdown voltage, 400W peak pulse power rating at 10/1000μs waveform, clamping voltage of 80.5V at 5.2A peak pulse current, and operates across –55°C to +175°C junction temperature range - deployed in automotive power supply rail protection.
For engineers reviewing the P4KE56CA datasheet, P4KE56CA pinout, P4KE56CA application, or P4KE56CA equivalent, key selection criteria include bidirectional clamping capability, low leakage (<1μA at 45.4V), DO-41 package compatibility, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
The P4KE56CA implements a silicon avalanche diode structure optimized for fast transient suppression with sub-nanosecond response time (<5ns for bidirectional mode). Its bidirectional configuration enables symmetrical clamping on both polarities without external polarity management.
It complies with ANSI/IEEE C62.35 for peak pulse current testing and delivers stable VBR (50.4–61.6V) at 1mA test current, with a temperature coefficient of 0.103%/°C - enabling predictable voltage drift over temperature in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR Min/Max | 50.4V / 61.6V at 1mA - defines reliable conduction onset window under surge conditions |
| VWM | 45.4V - maximum continuous reverse operating voltage before leakage exceeds 1μA |
| VC @ IPPM | 80.5V at 5.2A - clamped voltage during 10/1000μs surge, limiting downstream stress |
| PPK | 400W - peak pulse power handling per single 1ms transient, per JEDEC/ANSI standards |
| IR @ VWM | <1μA - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| TJ Range | –55°C to +175°C - supports under-hood automotive and industrial ambient operation |
| Package | DO-204AL (DO-41) - industry-standard axial leaded package with UL 94V-0 molding compound |
Pinout & Package
DO-204AL (DO-41) axial-leaded package with cathode band marking for unidirectional variants; P4KE56CA is bidirectional and lacks polarity marking - terminals are non-polarized and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | Either terminal serves as anode or cathode depending on transient polarity - no PCB orientation requirement |
| Lead 1 | Connection to PCB trace or wire | Tin-plated, solderable per J-STD-002; supports manual and wave soldering |
| Lead 2 | Connection to PCB trace or wire | Identical to Lead 1; symmetric construction enables flexible layout routing |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| 400W surge rating (10/1000μs) | Withstands ISO 7637-2 Pulse 1, 2a, 3a/b and IEC 61000-4-5 Level 4 transients |
| Clamping ratio VC/VBR ≈ 1.55 | Low overvoltage margin ensures robust protection of 48V-rated ICs and MOSFETs |
| Response time <5ns | Engages before ESD or EFT events damage sensitive gate oxides or interface pins |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU Directive 2011/65/EU for green manufacturing |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Suppressing load dump and alternator ripple transients on 24V/48V vehicle battery lines. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power input to clamp surges before reaching DC-DC converters and microcontrollers. Use Value: Limits peak voltage to 80.5V during 5.2A transients, preventing latch-up or gate oxide rupture in downstream 100V-rated FETs. | Use Scenario: Protecting analog input channels of programmable logic controllers from field-wiring induced surges. IC Role / Device Role / Timing Role: Parallel-connected TVS on each channel's signal line to shunt fast transients before precision ADC front-end. Use Value: Sub-5ns response ensures clamping occurs prior to ADC sampling window, preserving measurement fidelity. |
| LED Driver Overvoltage Clamp | RS-485 Transceiver Line Protection |
Use Scenario: Safeguarding constant-current LED drivers against inductive kickback from relay-controlled loads. IC Role / Device Role / Timing Role: TVS placed across driver output to absorb energy from coil de-energization spikes. Use Value: 400W rating handles repetitive 100ms inductive transients without thermal runaway or parameter shift. | Use Scenario: Shielding RS-485 transceivers from lightning-induced surges on long cable runs in factory automation. IC Role / Device Role / Timing Role: Bidirectional TVS on differential bus lines (A/B) to clamp common-mode and differential-mode transients. Use Value: Symmetrical VBR (50.4–61.6V) ensures balanced clamping on both data lines, maintaining signal integrity during fault 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 |
|---|---|---|---|
| SMBJ58CA | Surface-mount SMB package; 58V nominal VBR; 600W PPK; lower clamping voltage (93.6V @ 6.4A) | Requires PCB redesign for SMD placement; better suited for space-constrained boards | Select when board real estate is limited and higher surge margin is needed |
| 1.5KE56CA | Same DO-41 package; 56V nominal; 1500W PPK; higher clamping voltage (97.5V @ 15.4A) | Higher energy absorption but larger voltage overshoot during clamping | Select when protecting systems requiring >1kW transient handling with legacy through-hole layout |
Compared with SMBJ58CA and 1.5KE56CA, the P4KE56CA offers optimal balance of proven automotive qualification, axial-leaded ease-of-rework, and precise 400W/80.5V clamping for 24–48V systems - making it ideal for cost-sensitive, high-reliability through-hole designs.
Availability
P4KE56CA is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, LED lighting drivers, and RS-485 communication interfaces requiring stable component supply and AEC-Q101 compliance.
Supply support for P4KE56CA 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 - headquartered in Hsinchu, Taiwan.
The P4KE series belongs to TSC's automotive-qualified transient suppression portfolio, engineered specifically for robustness in 12V/24V/48V vehicle electrical systems and industrial control environments.
FAQ
What does the 'CA' suffix indicate in P4KE56CA?
The 'CA' suffix in P4KE56CA denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., P4KE56C), P4KE56CA has no cathode marking and functions identically regardless of terminal orientation, making it ideal for AC-coupled or floating signal lines.
Is P4KE56CA AEC-Q101 qualified?
Yes, P4KE56CA is AEC-Q101 qualified when ordered with the 'H' suffix (e.g., P4KE56CAH). The base P4KE56CA part meets all electrical and mechanical specifications of the AEC-Q101 standard, and Taiwan Semiconductor certifies the CA-series variants for automotive use - confirmed in Version N2104 documentation under "FEATURES" and "ORDERING INFORMATION".
What is the clamping voltage of P4KE56CA and how is it measured?
The clamping voltage of P4KE56CA is 80.5V, measured at 5.2A peak pulse current using the standardized 10/1000μs double-exponential waveform per ANSI/IEEE C62.35. This value represents the maximum voltage seen across the device during a defined surge event - critical for ensuring downstream components remain within their absolute maximum ratings during transient conditions.
Can P4KE56CA replace P4KE56A in a design?
No - P4KE56CA and P4KE56A are not interchangeable. P4KE56A is unidirectional with a cathode band and forward voltage drop (~3.5V), while P4KE56CA is bidirectional with no polarity marking and symmetrical characteristics. Substituting one for the other risks incorrect clamping behavior or open-circuit failure in AC or bipolar signal paths.
What is the maximum steady-state power dissipation for P4KE56CA?
The maximum steady-state power dissipation for P4KE56CA is 1W at lead temperature (TL) = 75°C, measured with 0.375" (9.5mm) lead lengths mounted on 5×5 mm copper pads per terminal. This rating applies only to continuous DC or low-frequency conditions - transient suppression relies on the 400W peak pulse rating, not steady-state limits.
P4KE56CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- P4KE
- 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):
- 5.4A
- Power - Peak Pulse:
- 400W
- 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-204AL (DO-41)
P4KE56CA FAQ
1.How can I place an order for P4KE56CA through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE56CA 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 P4KE56CA reliable?
The price and inventory of P4KE56CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE56CA is usually 5 days.
3.What payment methods are accepted for P4KE56CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE56CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE56CA?
P4KE56CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE56CA 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 P4KE56CA?
For technical support, including P4KE56CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE56CA requirements.
6.How does Aetrix verify that P4KE56CA is sourced from the original manufacturer or authorized distributors?
All P4KE56CA 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 P4KE56CA meets industry standards.
7.What is the process for return or replacement of P4KE56CA?
All P4KE56CA units undergo pre-shipment inspection (PSI). If there is an issue with P4KE56CA, 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 P4KE56CA part is unused and in its original packaging.
Return procedure for P4KE56CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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