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Taiwan Semiconductor Corporation P4KE56A
- Part No.:
- P4KE56A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE56A.pdf
- Description:
- TVS DIODE 47.8VWM 77VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,470
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Product details
Overview
P4KE56A from Taiwan Semiconductor is a unidirectional 400W transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 56V nominal breakdown voltage, 47.8V working stand-off voltage, 77.0V maximum clamping voltage at 5.4A peak pulse current, and DO-204AL (DO-41) axial package - deployed in automotive body control modules, industrial PLC I/O protection, and AC/DC adapter input stages.
For engineers reviewing the P4KE56A datasheet, P4KE56A pinout, P4KE56A application, or P4KE56A equivalent, key selection criteria include clamping performance under 10/1000μs surge, low leakage (<1μA @ 47.8V), AEC-Q101 qualification option (P4KE56AH), thermal robustness to +175°C, and compatibility with J-STD-002 soldering standards.
Technical Context
The P4KE56A operates as a silicon avalanche diode with unidirectional polarity, triggered when reverse voltage exceeds its 53.2–58.8V breakdown range at 1mA test current. Its low dynamic impedance ensures rapid voltage clamping during transients, with typical response time <1.0ps from 0V to VBR.
It complies with ANSI/IEEE C62.35 for transient suppression, delivers 400W non-repetitive peak pulse power at TA = 25°C, and derates linearly above ambient temperature per Fig.2 - maintaining 1W steady-state dissipation at 75°C lead temperature with 9.5mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 47.8 V - Maximum continuous reverse operating voltage before significant leakage; sets safe DC rail margin |
| VBR @ IT=1mA | 53.2–58.8 V - Breakdown threshold range; defines precise turn-on point for overvoltage events |
| VC @ IPPM=5.4A | 77.0 V - Clamped voltage during 10/1000μs surge; determines protected circuit's max stress level |
| IPPM | 5.4 A - Peak pulse current capability; quantifies surge energy handling (400W @ 1ms) |
| IR @ VWM | <1 μA - Reverse leakage at stand-off voltage; ensures minimal standby power loss |
| TJ max | +175 °C - Maximum junction temperature; supports under-hood and high-ambient industrial use |
| Package | DO-204AL (DO-41) - Axial-leaded through-hole package with UL 94V-0 molding and tin-plated leads |
Pinout & Package
DO-204AL (DO-41) axial package with cathode band marking. Leads are pure tin-plated and solderable per J-STD-002. Polarity is unidirectional: banded end is cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Input/Line side connection | Connected to protected line (e.g., 48V rail); conducts forward during fault reset |
| Cathode (banded end) | Clamp reference / ground return | Connected to system ground or low-impedance return path; sinks surge current during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power (10/1000μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4kV/2Ω) on 48V systems |
| <1.0ps response time (0V → VBR) | Prevents voltage overshoot before downstream ICs experience latch-up or gate oxide damage |
| AEC-Q101 qualified variant available (P4KE56AH) | Validated for automotive under-hood applications including engine control units and lighting drivers |
| UL 94V-0 flammability rating | Ensures flame-retardant encapsulation for safety-critical industrial and building automation equipment |
| RoHS & halogen-free (IEC 61249-2-21) | Meets global environmental compliance for export and end-of-life recycling requirements |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input |
|---|---|
|
Use Scenario: 12V/24V supply rail exposed to load dump and alternator ripple in BCMs. IC Role / Device Role / Timing Role: Primary clamping device placed at power entry before LDOs and microcontrollers. Use Value: Limits transient spikes to ≤77.0V, preventing brownout resets and ESD-induced MCU lockup. |
Use Scenario: 24V digital input channel subject to inductive kickback from solenoid valves. IC Role / Device Role / Timing Role: Front-end TVS shunting surge energy away from optocoupler input and protection FETs. Use Value: Absorbs 400W pulses without degradation, enabling >100,000 switching cycles per IEC 61000-4-4. |
| AC/DC Adapter Input Stage | LED Driver Power Supply |
|
Use Scenario: Bridge rectifier output subjected to lightning-induced surges on mains-connected adapters. IC Role / Device Role / Timing Role: Secondary-level clamping after MOV, providing precise voltage limiting before bulk capacitor and controller IC. Use Value: Tight 53.2–58.8V VBR window ensures coordination with upstream MOVs while minimizing capacitor stress. |
Use Scenario: Constant-current LED driver input exposed to hot-swap transients and cable discharge events. IC Role / Device Role / Timing Role: Standoff protection for buck controller IC and gate driver MOSFETs. Use Value: 47.8V VWM allows full utilization of 48V input range while clamping to 77.0V - below MOSFET VDSS rating. |
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 | Same DO-214AC (SMA) package; 58V VBR min (55.1–60.9V), 79.2V VC @ 5.1A; 400W rating | Surface-mount only; requires PCB rework vs. P4KE56A's through-hole DO-41 | Select for space-constrained designs where SMT assembly is preferred and thermal pad layout supports 175°C operation |
| Vishay 1.5KE56A | Higher 1500W rating; same 56V nominal, 47.8V VWM, but larger DO-201AE package (5.2mm Ø × 9.5mm L) | Overkill for 400W needs; adds board area and cost where P4KE56A's 400W suffices | Choose only if legacy 1.5KE footprint exists or future-proofing for higher-energy surges is required |
Compared with SMAJ58A and 1.5KE56A, the P4KE56A offers optimal balance of proven reliability in DO-41 through-hole assembly, AEC-Q101 qualification path, and precise 47.8V/77.0V VWM/VC ratio for 48V system protection - making it ideal for cost-sensitive, high-volume industrial and automotive modules.
Availability
P4KE56A is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC digital inputs, and AC/DC adapter input stages requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for P4KE56A 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 industrial, automotive, and consumer markets since 1979.
The P4KE series belongs to TSC's transient voltage suppressor product line, engineered specifically for high-reliability overvoltage protection in harsh environments - emphasizing tight parameter distribution, AEC-Q101 qualification readiness, and UL/IEC compliance.
FAQ
What is the maximum clamping voltage of the P4KE56A under standard surge conditions?
The P4KE56A exhibits a maximum clamping voltage (VC) of 77.0 V when subjected to its rated 5.4 A peak pulse current under the 10/1000 μs waveform. 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. The P4KE56A maintains this clamping performance across its full operating temperature range.
Is the P4KE56A suitable for automotive applications?
Yes - while the base P4KE56A is not AEC-Q101 qualified, Taiwan Semiconductor offers the P4KE56AH variant (with "H" suffix) that is fully AEC-Q101 qualified for automotive use. Both share identical electrical parameters including 47.8 V VWM, 53.2–58.8 V VBR, and 77.0 V VC. The P4KE56A itself is widely deployed in non-safety-critical automotive subsystems such as lighting control and infotainment power rails where qualification is not mandated.
How does the P4KE56A compare to bidirectional TVS diodes like P4KE56CA?
The P4KE56A is unidirectional and intended for DC line protection with defined polarity; the P4KE56CA is bidirectional and suited for AC signal lines or differential buses. Their breakdown voltages match (53.2–58.8 V), but the P4KE56CA has symmetrical clamping in both directions and no cathode band. Using P4KE56A on an AC path would cause forward conduction during negative half-cycles - so correct polarity assignment is essential. The P4KE56A must be installed with cathode toward the protected circuit's ground reference.
What is the reverse leakage current specification for the P4KE56A at its working voltage?
The P4KE56A specifies a maximum reverse leakage current (IR) of 1 μA when biased at its working stand-off voltage (VWM) of 47.8 V, measured at TA = 25°C. This ultra-low leakage ensures negligible power loss in always-on systems and prevents false triggering in high-impedance sensing circuits. Leakage remains below 5 μA up to 85°C ambient, supporting reliable operation in enclosed industrial enclosures.
Can the P4KE56A be used in parallel for higher surge current handling?
No - the P4KE56A is not characterized or recommended for parallel operation due to mismatch in VBR tolerance (±5% across units) and dynamic impedance, which causes current imbalance and potential thermal runaway. For higher surge capability, select a single higher-rated device such as the 1.5KE56A (1500W) or use coordinated staged protection (e.g., MOV + P4KE56A). The P4KE56A is designed for standalone 400W transient suppression in its specified DO-41 mounting configuration.
P4KE56A 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):
- 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)
P4KE56A FAQ
1.How can I place an order for P4KE56A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE56A 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 P4KE56A reliable?
The price and inventory of P4KE56A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE56A is usually 5 days.
3.What payment methods are accepted for P4KE56A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE56A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE56A?
P4KE56A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE56A 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 P4KE56A?
For technical support, including P4KE56A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE56A requirements.
6.How does Aetrix verify that P4KE56A is sourced from the original manufacturer or authorized distributors?
All P4KE56A 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 P4KE56A meets industry standards.
7.What is the process for return or replacement of P4KE56A?
All P4KE56A units undergo pre-shipment inspection (PSI). If there is an issue with P4KE56A, 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 P4KE56A part is unused and in its original packaging.
Return procedure for P4KE56A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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