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Taiwan Semiconductor Corporation P4KE440CA
- Part No.:
- P4KE440CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE440CA.pdf
- Description:
- TVS DIODE 376VWM 600VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,205
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Product details
Overview
P4KE440CA from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 440V nominal breakdown voltage (396–484V), 400W peak pulse power rating at 10/1000μs, clamping voltage of 631V at 0.66A peak pulse current, and operates across –55°C to +175°C junction temperature. It is commonly used in industrial power supplies and AC mains input stages to protect bridge rectifiers and downstream ICs.
For engineers reviewing the P4KE440CA datasheet, P4KE440CA pinout, P4KE440CA application, or P4KE440CA equivalent, key selection criteria include its bidirectional DO-41 package, 356V working stand-off voltage, <1μA reverse leakage at rated VWM, AEC-Q101 qualification option (H-suffix), and UL 94V-0 flammability compliance - all critical for robust overvoltage immunity in harsh environments.
Technical Context
The P4KE440CA is a silicon avalanche diode operating in reverse-biased breakdown mode to clamp transient voltages. Its bidirectional structure enables symmetrical clamping in both polarities without external polarity management, making it suitable for AC-coupled or floating signal paths.
It delivers 400W surge capability per the 10/1000μs standard waveform, with fast response time (<5.0ns for bidirectional operation) and low dynamic impedance. The device exhibits a 0.110%/°C temperature coefficient of VBR and maintains stable clamping performance up to 175°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 396 V / 484 V - Ensures reliable triggering above 356 V working stand-off while accommodating manufacturing tolerance |
| VWM | 356 V - Maximum continuous DC or RMS voltage the device blocks without significant leakage |
| VC @ IPPM | 631 V at 0.66 A - Clamped voltage during worst-case 400W transient; defines maximum stress on protected circuit |
| IPPM | 0.66 A - Peak pulse current corresponding to 400W surge at 10/1000μs waveform |
| ID @ VWM | <1 μA - Ultra-low leakage preserves system efficiency and prevents false triggering in high-impedance circuits |
| TJ Range | –55°C to +175°C - Enables deployment in under-hood automotive, industrial motor drives, and outdoor power equipment |
| Package | DO-204AL (DO-41) - Standard axial-leaded through-hole package compatible with legacy PCB assembly and manual repair |
Pinout & Package
DO-204AL (DO-41) package: axial-leaded, glass-passivated silicon junction, cathode band marking for unidirectional variants; P4KE440CA is bidirectional and marked without polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Acts as cathode during positive transients and anode during negative transients - no fixed polarity |
| Cathode | Transient return path (bidirectional) | Electrically identical to Anode in CA devices; terminals are interchangeable for AC surge suppression |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines or differential signals without external polarity routing |
| 400W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4kV line-earth, 2kV line-line) in properly designed front-end filters |
| UL 94V-0 molding compound | Prevents flame propagation during catastrophic failure, meeting safety requirements for Class II power supplies |
| AEC-Q101 qualified variant available | Supports automotive-grade reliability validation (e.g., P4KE440CAH) for engine control and body electronics |
| Low temperature coefficient (0.110%/°C) | Minimizes VBR drift over temperature, ensuring consistent clamping margin in wide-ambient applications |
Applications
| AC Mains Input Protection | Industrial Motor Drive DC Bus |
|---|---|
Use Scenario: Installed across AC input terminals of switch-mode power supplies to absorb lightning-induced surges and switching transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of bridge rectifier and EMI filter. Use Value: Limits transient voltage to ≤631V, preventing dielectric breakdown in X/Y capacitors and rectifier diodes rated for 600V RMS. | Use Scenario: Placed across DC bus rails in variable-frequency drives to suppress regenerative energy spikes during rapid deceleration. IC Role / Device Role / Timing Role: Passive crowbar element that diverts excess bus energy into snubber resistors or braking choppers. Use Value: Maintains bus voltage within 700V ceiling for 600V IGBT modules, avoiding desaturation faults and gate driver damage. |
| Telecom Line Interface | Renewable Energy Inverter AC Output |
Use Scenario: Integrated into DSL or PoE line cards to meet GR-1089-CORE Level 3 surge immunity requirements. IC Role / Device Role / Timing Role: First-stage protector before integrated line interface ICs (e.g., TI TPS2375x, Microchip LAN9252). Use Value: Clamps common-mode surges to <650V within 5ns, preserving signal integrity and enabling use of lower-cost isolation components. | Use Scenario: Mounted at grid-tie inverter AC output terminals to comply with IEEE 1547 anti-islanding and surge immunity mandates. IC Role / Device Role / Timing Role: Grid-side transient limiter protecting transformerless inverter topologies from utility-side switching events. Use Value: Withstands 6kV/3kA combination wave surges without degradation, supporting 20-year field life in solar farm deployments. |
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 SMAJ440CA | Same DO-214AC (SMA) package; 440V VBR, 400W rating, but 648V VC @ 0.62A - higher clamping voltage | Suitable for surface-mount designs; requires rework of footprint and thermal relief | Select when board space is constrained and SMT assembly is preferred over through-hole. |
| ON Semiconductor 1.5KE440CA | Higher 1500W rating, DO-201AD package, 640V VC @ 2.35A - greater surge capacity but larger size and higher cost | Better suited for primary-side protection in high-power UPS or medical PSUs requiring >1kW surge handling | Choose when system-level surge test levels exceed IEC 61000-4-5 Level 4 or require extended lifetime under repetitive stress. |
Compared with SMAJ440CA and 1.5KE440CA, the P4KE440CA offers optimal balance of proven reliability in axial-leaded form, precise 631V clamping for 600V-class systems, and cost-effective volume procurement - making it ideal for established industrial power supply platforms where DO-41 compatibility and long-term component continuity are prioritized.
Availability
P4KE440CA is available at Aetrix Electronics and suitable for industrial power supplies, renewable energy inverters, and telecom infrastructure requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4KE440CA 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 targets cost-sensitive, high-reliability surge protection in industrial, automotive, and consumer power systems - emphasizing rugged packaging, AEC-Q101 qualification pathways, and broad voltage coverage from 6.8V to 440V.
FAQ
What is the clamping voltage of the P4KE440CA under maximum rated surge conditions?
The P4KE440CA has a maximum clamping voltage (VC) of 631 V at 0.66 A peak pulse current (IPPM), measured under the standardized 10/1000 μs double-exponential surge waveform. This value defines the upper voltage limit imposed on protected circuitry during a 400W transient event and is confirmed in the "Maximum clamping voltage VC@IPPM" row of the P4KE440CA electrical characteristics table.
Is the P4KE440CA unidirectional or bidirectional, and how is polarity indicated?
The P4KE440CA is a bidirectional TVS diode, meaning it provides symmetrical clamping for both positive and negative transients without polarity sensitivity. Unlike unidirectional P4KE440A devices, the "CA" suffix denotes bidirectional construction, and the device lacks a cathode band marking - both leads are functionally identical and interchangeable in circuit layout.
Does the P4KE440CA meet automotive reliability standards?
The base P4KE440CA is not AEC-Q101 qualified, but Taiwan Semiconductor offers the P4KE440CAH variant - identical electrically and mechanically but fully tested to AEC-Q101 stress requirements. For automotive applications such as body control modules or infotainment power inputs, P4KE440CAH is the designated qualified version, while P4KE440CA serves industrial and commercial designs.
What is the maximum working stand-off voltage (VWM) for the P4KE440CA, and why does it differ from nominal voltage?
The P4KE440CA has a maximum working stand-off voltage (VWM) of 356 V, which is ~19% below its 440V nominal breakdown rating. This margin ensures the device remains non-conductive during normal operation while allowing for manufacturing variation in VBR (396–484 V) and temperature-induced drift, preventing premature leakage or thermal runaway in continuous AC applications.
Can the P4KE440CA be used in parallel to increase surge current handling?
No - the P4KE440CA should not be paralleled for increased current capacity due to mismatch in VBR tolerance (±10%) and dynamic impedance, which causes uneven current sharing and potential thermal runaway. For higher surge ratings, select a single higher-power device like the 1.5KE440CA (1500W) or implement staged protection with MOVs and gas discharge tubes upstream of the P4KE440CA.
P4KE440CA 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):
- 376V
- Voltage - Breakdown (Min):
- 418V
- Voltage - Clamping (Max) @ Ipp:
- 600V
- Current - Peak Pulse (10/1000µs):
- 690mA
- 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)
P4KE440CA FAQ
1.How can I place an order for P4KE440CA through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE440CA 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 P4KE440CA reliable?
The price and inventory of P4KE440CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE440CA is usually 5 days.
3.What payment methods are accepted for P4KE440CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE440CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE440CA?
P4KE440CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE440CA 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 P4KE440CA?
For technical support, including P4KE440CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE440CA requirements.
6.How does Aetrix verify that P4KE440CA is sourced from the original manufacturer or authorized distributors?
All P4KE440CA 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 P4KE440CA meets industry standards.
7.What is the process for return or replacement of P4KE440CA?
All P4KE440CA units undergo pre-shipment inspection (PSI). If there is an issue with P4KE440CA, 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 P4KE440CA part is unused and in its original packaging.
Return procedure for P4KE440CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE440CA Tags
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