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Taiwan Semiconductor Corporation P4KE440C
- Part No.:
- P4KE440C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE440C.pdf
- Description:
- 400W, 440V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,164
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Product details
Overview
P4KE440C from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It features a 440V nominal breakdown voltage (VBR min/max = 396–484 V), 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 range - deployed in industrial motor drives and telecom power supplies.
For engineers reviewing the P4KE440C datasheet, P4KE440C pinout, P4KE440C application, or P4KE440C equivalent, key selection criteria include unidirectional vs. bidirectional polarity marking, DO-41 package thermal derating above 25°C, clamping voltage margin relative to protected IC's absolute maximum rating, and compliance with IEC 61000-4-5 Level 4 surge immunity requirements.
Technical Context
The P4KE440C operates as a voltage-clamped avalanche diode, entering conduction when reverse voltage exceeds its specified VBR (396–484 V @ 1 mA). Its bidirectional structure enables symmetrical clamping in both polarities without external polarity management, making it suitable for AC-coupled or floating bus protection.
It delivers 400W peak pulse power per ANSI/IEEE C62.35 standard using a 10/1000μs waveform, with fast response time (<5 ns for bidirectional mode) and low dynamic impedance - critical for limiting transient-induced overvoltage before sensitive downstream circuitry sustains damage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 396 V / 484 V @ 1 mA - defines guaranteed conduction onset window under standardized test conditions |
| VWM | 356 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA |
| VC @ IPPM | 631 V @ 0.66 A - clamped voltage during full 400W surge, determining protected circuit's worst-case overvoltage exposure |
| PPK | 400 W - peak non-repetitive surge energy handling capability per 10/1000μs waveform |
| TJ max | +175 °C - maximum junction temperature enabling use in high-ambient industrial environments |
| ID @ VWM | ≤1 μA - ensures negligible standby power loss and minimal interference in high-impedance sensing paths |
| Package | DO-204AL (DO-41) - industry-standard axial-leaded package with UL 94V-0 molding and tin-plated leads |
Pinout & Package
DO-204AL (DO-41) package: axial-leaded, glass-passivated silicon junction, cathode band not marked on bidirectional variants (P4KE440C); body length 4.2 mm ±0.3 mm, lead diameter 0.6 mm, weight ≈0.300 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction terminals | No polarity marking required; identical clamping behavior in either direction - simplifies PCB layout and eliminates orientation errors |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines or differential buses without external diode pairing or polarity awareness |
| 400W surge rating (10/1000μs) | Meets IEC 61000-4-5 Level 4 (4 kV line-earth, 2 kV line-line) without derating in typical PCB layouts |
| Low leakage (≤1 μA @ 356 V) | Prevents measurable current draw in always-on systems and avoids false triggering in high-impedance monitoring circuits |
| AEC-Q101 qualified option (P4KE440CH) | Validated for automotive power electronics requiring extended temperature cycling and mechanical robustness |
| UL 94V-0 flammability rating | Ensures self-extinguishing behavior under fault-induced overheating, supporting safety-critical industrial certifications |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of DC bus inputs against inductive kickback from contactor switching and regenerative braking transients. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed directly across input terminals to shunt surge energy before reaching upstream rectifier and downstream DC-DC controllers. Use Value: Limits transient overvoltage to ≤631 V, maintaining safe margin below 800 V-rated electrolytic capacitors and 650 V IGBT gate drivers. |
Use Scenario: Surge suppression on -48 V telecom battery feed lines exposed to lightning-induced surges and hot-swap events. IC Role / Device Role / Timing Role: Bidirectional clamping device installed at board edge to absorb common-mode and differential-mode transients before PMIC and FPGA power rails. Use Value: Withstands 400W pulses without degradation, preserving system uptime in central office and remote radio head deployments. |
| Smart Grid Meters | EV Charging Station Interfaces |
Use Scenario: Protection of RS-485 communication ports and auxiliary power inputs against EFT bursts and surge coupling from nearby MV/LV switching. IC Role / Device Role / Timing Role: Fast-response (≤5 ns) TVS placed adjacent to connector to clamp transients before signal conditioning and isolation stages. Use Value: Maintains data integrity by preventing latch-up in isolated transceivers during 10/1000μs surges up to 4 kV. |
Use Scenario: DC link protection in 1000 V+ EVSE power modules subjected to grid-switching transients and ground potential rise events. IC Role / Device Role / Timing Role: High-VBR TVS mounted at DC input stage to limit overvoltage stress on SiC MOSFETs and film capacitors during fault conditions. Use Value: Clamps 631 V at 0.66 A, ensuring <10% overvoltage margin relative to 700 V-class components under worst-case surge. |
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 SMAJ440A | Same DO-214AC (SMA) package; 440 V VBR (min/max = 396–484 V); 400 W rating; unidirectional only | Requires dual-device configuration for bidirectional protection; higher thermal resistance than DO-41 in free-air mounting | Select when surface-mount assembly is mandatory and board space permits two devices or when polarity is fixed |
| ON Semiconductor 1.5KE440C | Same DO-201AE (DO-27) package; 440 V VBR (396–484 V); 1500 W rating; larger footprint and higher clamping (678 V @ 2.2 A) | Higher energy handling but slower response (>10 ns); less suitable for fast-edge EFT protection | Select when system-level surge tests exceed 4 kV and thermal mass supports larger package; avoid for sub-5 ns timing-critical nodes |
Compared with P4KE440C, SMAJ440A offers SMT compatibility but lacks inherent bidirectionality, while 1.5KE440C provides greater surge margin at the cost of slower response and larger board area - P4KE440C balances axial-leaded reliability, true bidirectional operation, and precise 631 V clamping for mid-tier industrial surge classes.
Availability
P4KE440C is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, smart grid meters, and EV charging station interfaces requiring stable component supply and long-term obsolescence management.
Supply support for P4KE440C 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 industrial, automotive, and consumer markets since 1979.
The P4KE series belongs to TSC's high-reliability TVS portfolio engineered specifically for robust surge immunity in harsh-environment power conversion and interface protection - emphasizing AEC-Q101 qualification, UL recognition, and tight parametric consistency across voltage grades.
FAQ
What does the 'C' suffix indicate in P4KE440C?
The 'C' suffix in P4KE440C denotes bidirectional configuration - meaning the device provides symmetrical clamping in both forward and reverse directions without polarity marking. Unlike unidirectional variants (e.g., P4KE440), P4KE440C has no cathode band and is used where AC transients or floating bus protection is required. This is confirmed in the "Devices for bipolar applications" section of the datasheet.
What is the maximum clamping voltage of P4KE440C and under what test condition?
The maximum clamping voltage of P4KE440C is 631 V, measured at a peak pulse current (IPPM) of 0.66 A using the standardized 10/1000 μs double-exponential surge waveform. This value is specified in the "Maximum clamping voltage VC@IPPM" column of the electrical characteristics table and defines the upper voltage limit imposed on protected circuitry during a full-rated 400W transient event.
Is P4KE440C RoHS and halogen-free compliant?
Yes, P4KE440C is RoHS compliant and halogen-free according to IEC 61249-2-21, as explicitly stated in the FEATURES section of the datasheet. The molding compound meets UL 94V-0 flammability rating, and the pure tin-plated leads comply with J-STD-002 solderability standards - supporting environmental compliance for industrial and telecom equipment.
Can P4KE440C be used in automotive applications?
P4KE440C itself is not AEC-Q101 qualified; however, the pin-compatible variant P4KE440CH (with 'H' suffix) is AEC-Q101 qualified and shares identical electrical parameters. For automotive power electronics such as body control modules or charging interfaces, P4KE440CH must be selected - the base P4KE440C is intended for industrial and telecom use where AEC-Q101 is not mandated.
What is the junction-to-ambient thermal resistance (RθJA) of P4KE440C in DO-41 package?
The datasheet does not specify RθJA for P4KE440C in isolation; instead, it provides steady-state power derating curves (Fig.2) showing 1 W dissipation at TL = 75°C with 9.5 mm lead lengths. For PCB-level thermal design, engineers should apply the derating curve - e.g., at 100°C ambient, maximum allowable power drops to ~0.7 W - rather than assuming a fixed RθJA value, as axial-leaded thermal performance depends heavily on copper pad area and airflow.
P4KE440C 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):
- 356V
- Voltage - Breakdown (Min):
- 396V
- Voltage - Clamping (Max) @ Ipp:
- 631V
- Current - Peak Pulse (10/1000µs):
- 660mA
- 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)
P4KE440C FAQ
1.How can I place an order for P4KE440C through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE440C 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 P4KE440C reliable?
The price and inventory of P4KE440C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE440C is usually 5 days.
3.What payment methods are accepted for P4KE440C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE440C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE440C?
P4KE440C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE440C 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 P4KE440C?
For technical support, including P4KE440C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE440C requirements.
6.How does Aetrix verify that P4KE440C is sourced from the original manufacturer or authorized distributors?
All P4KE440C 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 P4KE440C meets industry standards.
7.What is the process for return or replacement of P4KE440C?
All P4KE440C units undergo pre-shipment inspection (PSI). If there is an issue with P4KE440C, 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 P4KE440C part is unused and in its original packaging.
Return procedure for P4KE440C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE440C Tags
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