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Taiwan Semiconductor Corporation P4KE43C
- Part No.:
- P4KE43C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE43C.pdf
- Description:
- 400W, 43V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,199
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Product details
Overview
P4KE43C 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 nominal breakdown voltage of 43V, clamps transients to ≤61.9V at 6.7A peak pulse current, and delivers sub-nanosecond response time (<1.0ps from 0V to VBR) - deployed in automotive body control modules, industrial PLC I/O protection, and LED driver input stages.
For engineers reviewing the P4KE43C datasheet, P4KE43C pinout, P4KE43C application, or P4KE43C equivalent, key selection criteria include its DO-204AL (DO-41) axial package, 34.8V working stand-off voltage, <1μA reverse leakage at rated VWM, AEC-Q101 qualification option (P4KE43CH), and compliance with ANSI/IEEE C62.35 10/1000μs surge waveform standards.
Technical Context
The P4KE43C operates as a silicon avalanche diode with unidirectional polarity, leveraging controlled Zener/avalanche breakdown to clamp transient energy before downstream ICs are damaged. Its low dynamic impedance ensures stable clamping under fast-rising ESD or lightning-induced surges.
It is rated for 400W non-repetitive peak pulse power at TA = 25°C per 10/1000μs waveform, derates linearly above 25°C, and maintains operation across –55°C to +175°C junction temperature range - supporting under-hood automotive and high-temperature industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 34.8 V - Maximum continuous DC or RMS voltage the device blocks without conduction; sets safe operating margin below breakdown. |
| VBR @ IT = 1 mA | 38.7–47.3 V - Measured breakdown voltage range at 1 mA test current; defines precise turn-on threshold for transient clamping. |
| VC @ IPPM = 6.7 A | 61.9 V - Clamped voltage during 400W 10/1000μs surge; determines maximum stress imposed on protected circuitry. |
| IPPM | 6.7 A - Peak pulse current corresponding to 400W rating; used to size series impedance and verify system-level surge capability. |
| IR @ VWM | <1 μA - Reverse leakage at 34.8 V; ensures negligible standby power loss and no false triggering in low-power systems. |
| TJ max | +175 °C - Maximum junction temperature; enables placement near heat sources (e.g., power MOSFETs, transformers) without thermal derating concerns. |
| Response time | <1.0 ps - Time from 0 V to VBR; faster than most ESD events (IEC 61000-4-2), ensuring suppression before IC damage occurs. |
Pinout & Package
Package: DO-204AL (DO-41), axial-leaded, epoxy-molded case with UL 94V-0 flammability rating and pure tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or low-side reference; forms cathode-to-line configuration for unidirectional rail protection. |
| Cathode | Current exit point during avalanche breakdown | Connected to protected line (e.g., 24V supply rail); conducts surge current to ground when VLINE exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified variant available | P4KE43CH meets automotive-grade reliability testing (HTOL, TC, UHAST) for engine control, lighting, and ADAS subsystems. |
| 400W peak pulse power | Handles IEC 61000-4-5 Level 4 (4kV/2Ω) surges without degradation when properly heatsinked or mounted on 5×5 mm copper pads. |
| Low clamping ratio (VC/VBR ≈ 1.55) | Minimizes overvoltage overshoot during transients - critical for protecting 36–48V-rated microcontrollers and CAN transceivers. |
| Ultra-fast response <1.0 ps | Clamps ESD events (e.g., ±8kV contact discharge) before propagation into sensitive analog front-ends or ADC inputs. |
| RoHS and halogen-free | Complies with IEC 61249-2-21; suitable for consumer, medical, and export-regulated electronics requiring green material declarations. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protects 24V supply rail and switch-sense inputs against load dump (ISO 7637-2 Pulse 5a) and inductive kickback from solenoid drivers. IC Role / Device Role: Primary overvoltage clamp placed upstream of LDO regulators and microcontroller power pins. Use Value: Limits rail voltage to ≤61.9V during 120V/50ms load dump events, preventing brownout reset or permanent damage to 3.3V/5V logic. |
Use Scenario: Shields 24V digital input channels from field-wiring transients caused by relay coil de-energization or nearby motor switching. IC Role / Device Role: First-line protection element between terminal block and optocoupler input stage. Use Value: Absorbs >95% of 1 kV/500 Ω surge energy (IEC 61000-4-4), maintaining optocoupler isolation integrity and eliminating false triggering. |
| LED Driver Input Stage | RS-485 Transceiver Bus Line |
Use Scenario: Guards constant-current LED driver ICs against input capacitor charging surges and hot-swap transients in streetlight and signage applications. IC Role / Device Role: Unidirectional TVS connected anode-to-ground, cathode-to-input rail. Use Value: Clamps 400W surges to 61.9V while maintaining <1μA leakage - avoids efficiency loss in high-efficiency (>90%) drivers. |
Use Scenario: Installed on RS-485 A/B bus lines to suppress EFT bursts and lightning-induced common-mode transients in building automation networks. IC Role / Device Role: Paired unidirectional devices (one per line) referenced to local ground, complementing common-mode chokes. Use Value: Ensures bus remains operational after ≥10,000 EFT pulses (IEC 61000-4-4 Level 4), reducing communication dropouts in noisy factory environments. |
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 SMAJ43A | Same DO-214AC (SMA) package; 400W rating; VBR = 47.8–52.8 V; VC = 69.4 V at 5.8A - higher clamping voltage and lower IPPM. | Surface-mount only; requires PCB rework; less suitable for through-hole legacy designs or high-vibration mechanical mounting. | Select when automated SMT assembly is preferred and board space is constrained; verify clamping margin vs. protected IC absolute maximum ratings. |
| ON Semiconductor 1.5KE43C | Same DO-201AD (DO-27) package; 1500W rating; VBR = 38.7–47.3 V; VC = 64.5 V at 23.3A - higher surge capacity but larger footprint and higher leakage (~5 μA). | Higher energy handling suits infrequent but severe surges (e.g., outdoor telecom); not AEC-Q101 qualified. | Choose for cost-sensitive industrial equipment where 1500W margin is required and AEC-Q101 is unnecessary; confirm thermal pad layout compatibility. |
Compared with SMAJ43A and 1.5KE43C, the P4KE43C offers optimal balance of axial through-hole robustness, AEC-Q101 readiness, and tight 61.9V clamping - making it preferred for automotive and space-constrained industrial designs where DO-41 mechanical stability and low leakage are prioritized over raw wattage or SMT density.
Availability
P4KE43C is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, LED driver input protection, and RS-485 communication interfaces requiring stable component supply across long production lifecycles.
Supply support for P4KE43C 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 headquartered in Hsinchu, Taiwan, specializing in discrete power devices, TVS diodes, rectifiers, and thyristors since 1979.
The P4KE series was developed specifically for high-reliability transient suppression in automotive, industrial, and lighting applications - emphasizing AEC-Q101 qualification, tight parametric distribution, and robust surge endurance under real-world thermal cycling.
FAQ
What is the polarity configuration of the P4KE43C?
The P4KE43C is a unidirectional TVS diode with cathode band marking indicating the cathode terminal. It conducts only during reverse-biased overvoltage events - i.e., when the cathode voltage exceeds the anode by ≥38.7V - and blocks normal forward operation. This configuration is ideal for DC rail protection where polarity is fixed, unlike bidirectional variants like P4KE43CA which protect AC or reversible signal lines.
Does the P4KE43C meet AEC-Q101 qualification?
The base P4KE43C is not AEC-Q101 qualified; however, the variant P4KE43CH (with "H" suffix) is fully AEC-Q101 qualified per Rev. N2104 documentation. It undergoes stress testing including high-temperature operating life (HTOL), temperature cycling (TC), and unbiased highly accelerated stress test (UHAST) - confirming suitability for automotive powertrain, chassis, and body electronics applications.
What is the maximum clamping voltage of the P4KE43C under surge conditions?
The P4KE43C clamps to a maximum of 61.9 V when subjected to its rated 400W peak pulse (10/1000μs waveform) at 6.7 A peak pulse current (IPPM). This value is guaranteed across the full operating temperature range and represents the highest instantaneous voltage seen by downstream components during worst-case transient events.
How does the P4KE43C compare to the P4KE43A in terms of electrical performance?
The P4KE43C has a breakdown voltage range of 38.7–47.3 V at 1 mA, while the P4KE43A offers tighter tolerance: 40.9–45.2 V. Both share identical VWM (36.8 V), VC (59.3 V), and IPPM (7.0 A). The "C" suffix denotes standard tolerance; "A" indicates ±5% VBR - making P4KE43A preferable where precise clamping onset is critical, such as in regulated 42V battery systems.
Can the P4KE43C be used in bidirectional signal line protection?
No - the P4KE43C is strictly unidirectional and must not be used on AC or bidirectional data lines (e.g., USB, RS-485 differential pairs) without external circuitry. For such applications, use the bidirectional variant P4KE43CA, which provides symmetrical clamping in both polarities and is explicitly characterized for bidirectional operation per the datasheet's "Devices for bipolar applications" section.
P4KE43C 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):
- 34.8V
- Voltage - Breakdown (Min):
- 38.7V
- Voltage - Clamping (Max) @ Ipp:
- 61.9V
- Current - Peak Pulse (10/1000µs):
- 6.7A
- 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)
P4KE43C FAQ
1.How can I place an order for P4KE43C through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE43C 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 P4KE43C reliable?
The price and inventory of P4KE43C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE43C is usually 5 days.
3.What payment methods are accepted for P4KE43C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE43C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE43C?
P4KE43C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE43C 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 P4KE43C?
For technical support, including P4KE43C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE43C requirements.
6.How does Aetrix verify that P4KE43C is sourced from the original manufacturer or authorized distributors?
All P4KE43C 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 P4KE43C meets industry standards.
7.What is the process for return or replacement of P4KE43C?
All P4KE43C units undergo pre-shipment inspection (PSI). If there is an issue with P4KE43C, 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 P4KE43C part is unused and in its original packaging.
Return procedure for P4KE43C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE43C Tags
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