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Taiwan Semiconductor Corporation P4KE56
- Part No.:
- P4KE56
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE56.pdf
- Description:
- 400W, 56V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,119
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Product details
Overview
P4KE56 from Taiwan Semiconductor is a unidirectional 400W transient voltage suppressor (TVS) diode designed for primary-level overvoltage protection in DC power rails and signal lines. It features a 56V nominal breakdown voltage, 45.4V working stand-off voltage, 80.5V maximum clamping voltage at 5.2A peak pulse current, and DO-204AL (DO-41) axial package - deployed in automotive body electronics, industrial PLC I/O modules, and AC/DC adapter input stages.
For engineers reviewing the P4KE56 datasheet, P4KE56 pinout, P4KE56 application, or P4KE56 equivalent, key selection criteria include clamping performance under 10/1000μs surge, low leakage (<1μA @ 45.4V), AEC-Q101 qualification option (P4KE56H), thermal robustness to +175°C, and compatibility with J-STD-002 soldering processes.
Technical Context
The P4KE56 operates as a silicon avalanche diode with unidirectional polarity, triggered when reverse voltage exceeds its 50.4–61.6V breakdown range at 1mA test current. Its low dynamic impedance ensures rapid voltage clamping during transients, while the 10/1000μs waveform rating confirms compliance with IEC 61000-4-5 Level 4 surge immunity requirements.
Thermal design relies on junction-to-lead conduction; steady-state dissipation is limited to 1W at 75°C lead temperature with 9.5mm copper pads. The device exhibits a +0.103%/°C VBR temperature coefficient and maintains <1μA reverse leakage above 10V, supporting low-power standby circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45.4 V - Maximum continuous reverse operating voltage before leakage rises significantly; sets safe DC rail margin. |
| VBR @ 1mA | 50.4–61.6 V - Breakdown voltage range defining turn-on threshold; tight tolerance enables predictable clamping onset. |
| VC @ IPPM | 80.5 V - Clamped voltage at 5.2A peak pulse current; determines protected circuit's maximum transient exposure. |
| PPK | 400 W - Peak pulse power handling per 10/1000μs waveform; supports IEC 61000-4-5 Class 4 surge events. |
| IR @ VWM | <1 μA - Reverse leakage at working voltage; critical for battery-powered or high-impedance sensing nodes. |
| TJMAX | +175 °C - Maximum junction temperature; enables operation in under-hood automotive or enclosed industrial enclosures. |
| Package | DO-204AL (DO-41) - Axial-leaded through-hole package with UL 94V-0 molding compound and tin-plated leads. |
Pinout & Package
DO-204AL (DO-41) axial package with cathode band marking; leads are tinned and solderable per J-STD-002. Polarity is unidirectional: banded end is cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (non-banded end) | Ground reference / return path | Connected to system ground or low-side return; completes clamping path during transient events. |
| Cathode (banded end) | Protected line input | Connected to line being protected (e.g., 48V supply rail); avalanche conduction occurs from cathode to anode. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified variant available | P4KE56H meets stress testing for automotive under-hood applications including temperature cycling and HTRB. |
| Fast response time | <1.0 ps rise from 0 V to VBR, enabling suppression of ESD and fast-rising EFT bursts before IC damage occurs. |
| Low clamping ratio | VC/VWM = 80.5/45.4 ≈ 1.77 - Minimizes overvoltage stress on downstream components during surge events. |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - suitable for environmentally regulated industrial and consumer products. |
| UL recognition | UL File #E326243 - Validates safety compliance for end-equipment certification in North America. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
|
Use Scenario: Protects 12V/24V microcontroller I/O pins and CAN transceiver power rails from load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed directly at connector entry point before EMI filter and LDO regulator. Use Value: Limits transient voltage to ≤80.5V, preventing latch-up or gate oxide rupture in 3.3V/5V logic interfaces. |
Use Scenario: Shields 24V digital input optocoupler front-end from field-wiring surges and relay coil flyback. IC Role / Device Role / Timing Role: First-line protection element between terminal block and input conditioning circuitry. Use Value: Absorbs 400W surge energy without degradation, maintaining signal integrity across 10k+ switching cycles. |
| AC/DC Adapter Input Stage | LED Driver Power Supply |
|
Use Scenario: Guards bridge rectifier output and bulk capacitor against line-to-line and line-to-ground surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Parallel-connected TVS across DC bus to clamp voltage overshoot during lightning-induced transients. Use Value: Clamps to 80.5V within nanoseconds, preventing overvoltage failure of electrolytic capacitors rated at 100V. |
Use Scenario: Safeguards constant-current LED driver ICs from inductive kickback during MOSFET switching transitions. IC Role / Device Role / Timing Role: Placed across driver output terminals to shunt flyback energy away from sensitive current-sense amplifier inputs. Use Value: Enables reliable operation at ambient temperatures up to +105°C with no derating required below TJ = 175°C. |
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) surface-mount package; 58V VWM; 84.5V VC @ 4.7A; 400W rating. | Requires PCB re-layout for SMT vs. through-hole; better suited for space-constrained consumer designs. | Select when board real estate is constrained and automated assembly is preferred over manual through-hole insertion. |
| ON Semiconductor 1.5KE56A | Same DO-204AL package; tighter VBR tolerance (53.2–58.8V); 80.5V VC @ 5.2A; identical 400W rating. | Functionally interchangeable in legacy designs; minor VBR distribution shift may affect margin in precision clamp circuits. | Choose for drop-in replacement where second-source assurance is required and existing footprint must be retained. |
Compared with Littelfuse SMAJ58A and ON Semiconductor 1.5KE56A, the P4KE56 offers identical surge capability and clamping performance in a cost-optimized through-hole package, with AEC-Q101 qualification available for automotive use - making it optimal for industrial and automotive applications requiring proven reliability and manual/service-friendly assembly.
Availability
P4KE56 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O protection, and AC/DC adapter input-stage surge suppression requiring stable component supply across multi-year production cycles.
Supply support for P4KE56 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, specializing in power management, protection devices, and automotive-grade components.
The P4KE series belongs to TSC's transient voltage suppressor product line, engineered specifically for robust, high-energy surge immunity in automotive, industrial, and power supply applications - emphasizing AEC-Q101 qualification, thermal resilience, and long-term reliability under repetitive stress.
FAQ
What is the maximum clamping voltage of the P4KE56 under standard surge conditions?
The P4KE56 clamps to a maximum of 80.5 V when subjected to a 10/1000 μs surge waveform at its rated peak pulse current of 5.2 A. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the P4KE56 suitable for automotive applications?
Yes - the P4KE56H variant is AEC-Q101 qualified and tested for automotive under-hood environments, including temperature cycling, high-temperature reverse bias, and humidity testing. The base P4KE56 meets all electrical specifications required for BCM, lighting control, and infotainment power rail protection, though qualification requires the 'H' suffix.
How does the P4KE56 differ from the P4KE56A version?
The P4KE56A has a tighter breakdown voltage range (53.2–58.8 V) versus P4KE56 (50.4–61.6 V), achieved via enhanced binning. Both share identical VWM (45.4 V), VC (80.5 V), and 400W rating. The 'A' suffix indicates improved VBR consistency - beneficial in designs where precise clamping threshold is critical, such as regulated power supply feedback paths.
What is the thermal derating behavior of the P4KE56 above 25°C ambient?
The P4KE56's peak pulse power remains 400W up to TA = 25°C, then derates linearly per Figure 2 in the datasheet. At 75°C ambient, steady-state power dissipation drops to 1W with 9.5mm copper pads per lead. Junction temperature must not exceed +175°C - requiring thermal analysis when used in sealed enclosures or high-power density layouts.
Can the P4KE56 be used in bidirectional configurations?
No - the P4KE56 is unidirectional only, marked with a cathode band. For bidirectional protection, select P4KE56CA (or P4KE56C), which uses a center-tapped configuration to provide symmetrical clamping in both polarities. Using P4KE56 in reverse-biased mode risks permanent breakdown due to lack of forward conduction path.
P4KE56 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 45.4V
- Voltage - Breakdown (Min):
- 50.4V
- Voltage - Clamping (Max) @ Ipp:
- 80.5V
- Current - Peak Pulse (10/1000µs):
- 5.2A
- 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)
P4KE56 FAQ
1.How can I place an order for P4KE56 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE56 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 P4KE56 reliable?
The price and inventory of P4KE56 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE56 is usually 5 days.
3.What payment methods are accepted for P4KE56?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE56 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE56?
P4KE56 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE56 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 P4KE56?
For technical support, including P4KE56 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE56 requirements.
6.How does Aetrix verify that P4KE56 is sourced from the original manufacturer or authorized distributors?
All P4KE56 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 P4KE56 meets industry standards.
7.What is the process for return or replacement of P4KE56?
All P4KE56 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE56, 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 P4KE56 part is unused and in its original packaging.
Return procedure for P4KE56:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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