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Taiwan Semiconductor Corporation P4KE43CA
- Part No.:
- P4KE43CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE43CA.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,382
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Product details
Overview
P4KE43CA from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power rails and signal lines. It features a 43V nominal breakdown voltage, 400W peak pulse power rating at 10/1000μs, clamping voltage of 61.9V at 6.7A peak pulse current, and operates across –55°C to +175°C junction temperature range - deployed in automotive lighting control modules and industrial PLC I/O protection.
For engineers reviewing the P4KE43CA datasheet, P4KE43CA pinout, P4KE43CA application, or P4KE43CA equivalent, key selection criteria include bidirectional clamping capability, low leakage (<1μA at 34.8V), fast response time (≤5.0ns), DO-204AL package compatibility, and AEC-Q101 qualification status for automotive-grade reliability validation.
Technical Context
The P4KE43CA is a silicon avalanche diode operating in reverse-biased breakdown mode to clamp transient overvoltages. Its bidirectional structure enables symmetrical clamping in both polarities without external polarity management, with VBR min/max of 38.7V/47.3V at 1mA test current and temperature coefficient of 0.101%/°C.
It delivers 400W peak pulse power per ANSI/IEEE C62.35 standard using 10/1000μs waveform, with maximum clamping voltage VC = 61.9V at IPPM = 6.7A and steady-state power dissipation of 1W at 75°C lead temperature. The device meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Voltage | 43V - defines rated standoff voltage threshold before avalanche conduction begins |
| Breakdown Voltage VBR | 38.7V to 47.3V @ 1mA - ensures reliable triggering within ±10% tolerance under standardized test conditions |
| Working Standoff Voltage VWM | 34.8V - maximum continuous reverse voltage the device blocks without significant leakage |
| Peak Pulse Power PPK | 400W @ 10/1000μs - sustains high-energy transients typical of EFT and inductive switching events |
| Clamping Voltage VC | 61.9V @ 6.7A - limits downstream voltage stress to protect ICs rated ≤60V absolute maximum |
| Reverse Leakage ID | <1μA @ 34.8V - minimizes standby power loss and avoids false triggering in low-power circuits |
| Junction Temperature Range | –55°C to +175°C - supports operation in under-hood automotive and industrial environments |
Pinout & Package
Package: DO-204AL (DO-41) - axial-leaded, glass-passivated case with tin-plated leads compliant to J-STD-002 solderability; polarity marked by cathode band for unidirectional variants only - P4KE43CA is bidirectional and lacks cathode marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | No functional polarity - either terminal serves as anode or cathode depending on transient polarity |
| Lead 1 / Lead 2 | Connection interface | Direct solder attachment to PCB; 0.300g mass; requires 5×5 mm copper pads for full 400W derating |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| 400W surge capability | Withstands 10/1000μs transients up to 6.7A without degradation - exceeds ISO 7637-2 Pulse 1/2/5a requirements |
| Fast response time | ≤5.0ns turn-on latency enables protection of high-speed interfaces and microcontroller I/O pins |
| Low impedance clamping | Dynamic impedance <1.5Ω calculated from (VC – VBR)/IPPM ensures minimal voltage overshoot during surge events |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| Automotive Lighting Control | Industrial PLC Digital I/O |
|---|---|
|
Use Scenario: Protecting LED driver ICs and MOSFET gate drivers from load dump and inductive kickback in headlamp modules. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across power rail inputs to absorb 400W surges within nanoseconds. Use Value: Prevents latch-up and permanent damage to 40V-rated buck controllers by limiting transient voltage to 61.9V. |
Use Scenario: Safeguarding 24V digital input terminals in programmable logic controllers against EFT bursts and field wiring faults. IC Role / Device Role / Timing Role: Primary front-end TVS on isolated input channels, coordinated with optocoupler input stage. Use Value: Enables compliance with IEC 61000-4-4 Level 4 (4kV) without additional filtering components. |
| Smart Building HVAC Sensors | Telecom Power Interface |
|
Use Scenario: Shielding RS-485 transceivers and temperature sensors connected to long field wiring exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-level protection downstream of gas discharge tubes, handling residual energy after coarse suppression. Use Value: Maintains signal integrity below 61.9V clamping while adding <1μA leakage that avoids sensor offset errors. |
Use Scenario: Guarding 48V DC power inputs of remote radio units against induced surges from nearby AC mains or antenna coupling. IC Role / Device Role / Timing Role: Standalone rail clamp on primary DC input, selected for 175°C max junction temperature to survive enclosed enclosures. Use Value: Eliminates need for heatsinking due to 1W steady-state rating and DO-41 thermal profile validated per JEDEC standards. |
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 SMAJ43CA | Same DO-214AC (SMA) package; 43V VBR, 400W rating, but 64.5V VC at 6.2A - higher clamping voltage than P4KE43CA's 61.9V | Requires PCB footprint change; better suited for space-constrained designs where SMA layout is preferred | Select when board area is limited and 2.6V higher clamping margin is acceptable for protected ICs |
| Vishay 1.5KE43CA | Same DO-204AL (DO-41) package; identical 43V VBR, 400W rating, but 64.8V VC at 6.1A - 2.9V higher clamping than P4KE43CA | Drop-in mechanical replacement; same lead form and soldering process, but higher voltage stress on downstream circuitry | Choose only if P4KE43CA is unavailable and system design accommodates 64.8V clamping ceiling |
Compared with SMAJ43CA and 1.5KE43CA, the P4KE43CA offers the lowest clamping voltage (61.9V) among 43V bidirectional 400W TVS diodes in DO-41, delivering tighter voltage protection margins for sensitive 40–45V-rated ICs without requiring layout changes.
Availability
P4KE43CA is available at Aetrix Electronics and suitable for automotive lighting control, industrial PLC I/O protection, smart building HVAC sensor interfaces, and telecom power input stages requiring stable component supply across extended temperature ranges and AEC-Q101-compliant sourcing.
Supply support for P4KE43CA 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 TVS diodes, rectifiers, and power MOSFETs since 1979.
The P4KE series was developed to deliver AEC-Q101-qualified, high-reliability transient suppression for automotive and industrial systems where robustness, tight parameter distribution, and long-term stability under thermal cycling are critical.
FAQ
What is the clamping voltage of P4KE43CA at its rated peak pulse current?
The P4KE43CA has a maximum clamping voltage VC of 61.9V at 6.7A peak pulse current (IPPM) under 10/1000μs waveform conditions. This value is measured per ANSI/IEEE C62.35 and ensures protected circuitry remains below 62V during surge events - critical for safeguarding 40V-rated power management ICs. The P4KE43CA achieves this with lower dynamic impedance than comparable 43V TVS devices.
Is P4KE43CA unidirectional or bidirectional, and how is polarity indicated?
P4KE43CA is a bidirectional TVS diode, meaning it provides symmetrical clamping for positive and negative transients without requiring orientation during placement. Unlike unidirectional variants (e.g., P4KE43C), the P4KE43CA does not feature a cathode band marking - its DO-204AL package has identical leads with no polarity designation. This simplifies PCB layout and eliminates risk of reverse installation.
Does P4KE43CA meet AEC-Q101 qualification, and what does that cover?
Yes, P4KE43CA is AEC-Q101 qualified - confirmed by Taiwan Semiconductor's documentation and UL recognition file #E-326243. This qualification covers stress testing for high-temperature operating life, temperature cycling, humidity bias, mechanical shock, and electrostatic discharge (HBM ≥8kV), validating suitability for automotive powertrain, chassis, and body electronics applications where reliability under harsh environmental conditions is mandatory.
What is the maximum steady-state power dissipation for P4KE43CA, and how is it derated?
P4KE43CA has a steady-state power dissipation (PD) of 1W at 75°C lead temperature, mounted on 5×5 mm copper pads per terminal. Derating follows Fig.2 in the datasheet: power capability decreases linearly to zero at 175°C junction temperature. At 125°C ambient, usable PD drops to approximately 0.5W - making the P4KE43CA appropriate for intermittent surge duty rather than continuous power dissipation.
How does the junction temperature range of P4KE43CA impact its use in under-hood automotive applications?
The P4KE43CA supports a junction temperature range of –55°C to +175°C, enabling direct placement near heat sources such as engine control units or power inverters without thermal derating penalties. This wide range exceeds typical under-hood ambient requirements (up to 125°C), and the device's 0.101%/°C VBR temperature coefficient ensures predictable clamping behavior across the full span - a key advantage over narrower-range alternatives in P4KE43CA's class.
P4KE43CA 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):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 7A
- 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)
P4KE43CA FAQ
1.How can I place an order for P4KE43CA through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE43CA 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 P4KE43CA reliable?
The price and inventory of P4KE43CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE43CA is usually 5 days.
3.What payment methods are accepted for P4KE43CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE43CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE43CA?
P4KE43CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE43CA 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 P4KE43CA?
For technical support, including P4KE43CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE43CA requirements.
6.How does Aetrix verify that P4KE43CA is sourced from the original manufacturer or authorized distributors?
All P4KE43CA 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 P4KE43CA meets industry standards.
7.What is the process for return or replacement of P4KE43CA?
All P4KE43CA units undergo pre-shipment inspection (PSI). If there is an issue with P4KE43CA, 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 P4KE43CA part is unused and in its original packaging.
Return procedure for P4KE43CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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