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Taiwan Semiconductor Corporation P4KE47A
- Part No.:
- P4KE47A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE47A.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,876
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Product details
Overview
P4KE47A from Taiwan Semiconductor is a unidirectional 400W transient voltage suppressor (TVS) diode designed for primary-side overvoltage protection in DC power rails and signal lines. It features a 47V nominal breakdown voltage, 40.2V working stand-off voltage, 64.8V maximum clamping voltage at 6.4A peak pulse current, and operates across –55°C to +175°C junction temperature range - deployed in automotive power supply input stages and industrial sensor interface protection.
For engineers reviewing the P4KE47A datasheet, P4KE47A pinout, P4KE47A application, or P4KE47A equivalent, key selection criteria include clamping performance under 10/1000μs surge, low leakage (<1μA @ 40.2V), AEC-Q101 qualification status, DO-41 package compatibility, and thermal derating behavior above 25°C ambient.
Technical Context
The P4KE47A is a silicon avalanche diode optimized for fast transient suppression using controlled reverse-biased breakdown. Its unidirectional configuration provides polarity-specific protection with cathode-band marking, and its 1.0ps response time ensures sub-nanosecond turn-on from 0V to VBR, critical for ESD and EFT immunity in automotive ECUs and industrial PLC I/O modules.
It delivers 400W peak pulse power per 10/1000μs waveform, with clamping voltage tightly bounded at 64.8V (max) at 6.4A IPPM - enabling robust protection of 48V system components without overstressing downstream regulators or microcontrollers. The device's 0.101%/°C VBR temperature coefficient ensures stable threshold behavior across wide operating temperatures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40.2 V - Maximum continuous reverse voltage before significant leakage; sets safe operating margin below 47V nominal system rail. |
| VBR @ IT=1mA | 44.7–49.4 V - Verified breakdown range at 1mA test current; guarantees reliable conduction onset during transients. |
| VC @ IPPM=6.4A | 64.8 V - Maximum clamped voltage during 400W surge; defines worst-case stress on protected ICs. |
| IPPM | 6.4 A - Peak pulse current capability under 10/1000μs waveform; determines energy-handling capacity. |
| IR @ VWM | <1 μA - Ultra-low reverse leakage at stand-off voltage; avoids unnecessary power loss in battery-powered systems. |
| TJ Range | –55°C to +175°C - Full automotive-grade junction temperature range; supports under-hood and industrial control environments. |
| Package | DO-204AL (DO-41) - Industry-standard axial-leaded package with tin-plated leads; compatible with wave and reflow soldering per J-STD-002. |
Pinout & Package
DO-204AL (DO-41) package: axial-leaded, glass-passivated silicon junction, cathode indicated by band marking. Leads are pure tin-plated and solderable per J-STD-002; meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground or low-side return path; completes clamping loop during transient events. |
| Cathode | Protected line input | Connected to the line being protected (e.g., 48V rail input); conducts avalanche current to ground when VIN exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified variant available | Validated for automotive powertrain and body electronics applications requiring high-reliability surge protection. |
| 400W peak pulse power (10/1000μs) | Handles high-energy surges such as ISO 7637-2 Pulse 1/2a/5a without degradation - suitable for 24V/48V vehicle electrical systems. |
| Clamping voltage ≤64.8V at 6.4A | Ensures protected 48V-rated ICs (e.g., CAN transceivers, MCU I/O) remain within absolute maximum ratings during surge events. |
| Response time <1.0ps (unidirectional) | Activates faster than most ESD threats (IEC 61000-4-2), minimizing voltage overshoot before clamping engages. |
| Low leakage <1μA @ 40.2V | Prevents measurable standby current drain in always-on circuits like telematics or alarm monitoring systems. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 48V DC-DC converter input against load dump and alternator surge per ISO 7637-2. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of input filter and regulator ICs. Use Value: Limits transient voltage to ≤64.8V, preventing damage to buck controller ICs rated for 75V max input. | Use Scenario: Shielding analog sensor outputs (e.g., 4–20mA current loop) from EFT bursts in factory automation. IC Role / Device Role / Timing Role: Low-capacitance TVS placed at connector entry point before signal conditioning op-amps. Use Value: Sub-1ps response prevents >100ns voltage spikes from coupling into precision amplifiers or ADC front-ends. |
| Lighting System Surge Suppression | ESD Protection for Automotive Infotainment Ports |
Use Scenario: Safeguarding LED driver IC inputs in exterior lighting modules exposed to ISO 16750-2 transients. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12V/24V supply rail feeding constant-current LED drivers. Use Value: Withstands repeated 400W pulses while maintaining <1μA leakage - no thermal drift or parameter shift after 10k surge cycles. | Use Scenario: Protecting USB and HDMI ports in head units from human-body-model (HBM) ESD events. IC Role / Device Role / Timing Role: Unidirectional TVS on VBUS and data lines, referenced to chassis ground. Use Value: Clamps 8kV contact discharge to <65V within 1ps, preserving signal integrity and avoiding latch-up in USB PHY ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45A | Surface-mount SMB package; 45V VWM, 64.5V VC @ 6.5A; same 400W rating but lower parasitic inductance. | Better suited for high-frequency PCB layouts where lead inductance must be minimized; not axial-leaded. | Select SMBJ45A when board space is constrained and automated SMT assembly is used. |
| 1.5KE47A | Same DO-41 package and 47V rating, but 1500W peak power; larger die, higher capacitance (~100pF vs. ~50pF), slower response (~1.5ps). | Used where higher single-event energy tolerance is required (e.g., telecom AC input), but overkill for typical 400W automotive transients. | Choose 1.5KE47A only if legacy design mandates 1500W rating; otherwise P4KE47A offers better cost, size, and speed trade-off. |
Compared with SMBJ45A and 1.5KE47A, the P4KE47A delivers optimal balance of axial-leaded manufacturability, 400W surge handling, sub-1ps response, and ultra-low leakage - making it the preferred choice for new 48V automotive and industrial power rail designs where DO-41 form factor and AEC-Q101 compliance are required.
Availability
P4KE47A is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor interface hardening, lighting system surge suppression, and ESD protection for infotainment ports requiring stable component supply and long-term lifecycle support.
Supply support for P4KE47A 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, with global distribution and AEC-Q101 validation capabilities.
The P4KE series was developed specifically for cost-sensitive, high-volume automotive and industrial transient protection applications - emphasizing reliability under harsh thermal and surge conditions while maintaining strict parametric consistency across voltage grades.
FAQ
What is the maximum clamping voltage of the P4KE47A under standard 10/1000μs surge conditions?
The P4KE47A has a maximum clamping voltage (VC) of 64.8 V when subjected to its rated peak pulse current of 6.4 A under the 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures protected circuitry remains within safe voltage limits during standardized surge events. The P4KE47A maintains this clamping performance consistently across its specified operating temperature range.
Is the P4KE47A suitable for automotive applications requiring AEC-Q101 qualification?
Yes - the P4KE47A is available in an AEC-Q101 qualified version (marked as P4KE47AH or P4KE47A-H depending on packaging). This variant undergoes stress testing per AEC-Q101 including HTGB, HTRB, and TCT to validate reliability for automotive powertrain and body electronics. Always verify the specific ordering code (e.g., P4KE47AH) matches the AEC-Q101 requirement for your P4KE47A design.
How does the P4KE47A differ from the P4KE47 (non-A) variant?
The P4KE47A features tighter breakdown voltage tolerance (44.7–49.4 V) versus P4KE47 (42.3–51.7 V), resulting in more predictable clamping onset and reduced unit-to-unit variation. It also exhibits lower leakage and improved temperature coefficient consistency. These enhancements make the P4KE47A preferable for precision protection applications where consistent VBR and minimal drift are critical - such as in regulated 48V power distribution networks.
What is the reverse leakage current specification for the P4KE47A at its working stand-off voltage?
The P4KE47A specifies a maximum reverse leakage current (IR) of less than 1 μA when biased at its working stand-off voltage of 40.2 V. This ultra-low leakage is confirmed at TA = 25°C and supports energy-efficient designs, especially in always-on automotive subsystems like remote keyless entry receivers or CAN wake-up circuits where quiescent current budgets are tight.
Can the P4KE47A be used in bidirectional configurations?
No - the P4KE47A is a unidirectional TVS diode, intended for polarity-specific protection with cathode-band marking. For bidirectional operation, select the CA-suffixed variant (e.g., P4KE47CA) or a dedicated bidirectional part. Using P4KE47A in reverse-biased mode beyond its specified VWM risks premature breakdown or parametric shift; its design and characterization apply only to forward-anode/reverse-cathode orientation.
P4KE47A 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):
- 40.2V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.8V
- Current - Peak Pulse (10/1000µs):
- 6.4A
- 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)
P4KE47A FAQ
1.How can I place an order for P4KE47A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE47A 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 P4KE47A reliable?
The price and inventory of P4KE47A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE47A is usually 5 days.
3.What payment methods are accepted for P4KE47A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE47A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE47A?
P4KE47A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE47A 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 P4KE47A?
For technical support, including P4KE47A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE47A requirements.
6.How does Aetrix verify that P4KE47A is sourced from the original manufacturer or authorized distributors?
All P4KE47A 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 P4KE47A meets industry standards.
7.What is the process for return or replacement of P4KE47A?
All P4KE47A units undergo pre-shipment inspection (PSI). If there is an issue with P4KE47A, 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 P4KE47A part is unused and in its original packaging.
Return procedure for P4KE47A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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