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STMicroelectronics P6KE400CA
- Part No.:
- P6KE400CA
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
P6KE400CA.pdf
- Description:
- TVS DIODE 342VWM 706VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:3,631
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Product details
Overview
P6KE400CA from STMicroelectronics is a bidirectional transient voltage suppression (TVS) diode in DO-15 package, designed for high-energy surge protection in power supply inputs and telecom interfaces. It features a 400 V standoff voltage (VRM = 342 V), 548 V clamping voltage at 1.1 A (10/1000 µs), 600 W peak pulse power rating, and operates up to 175 °C junction temperature - deployed in AC/DC front-end protection for industrial power supplies.
For engineers reviewing the P6KE400CA datasheet, P6KE400CA pinout, P6KE400CA application, or P6KE400CA equivalent, key selection criteria include clamping voltage margin vs. protected IC's absolute maximum rating, bidirectional symmetry for AC-coupled lines, thermal derating above 25 °C, and IEC 61000-4-2/4-4 compliance verification at system level.
Technical Context
The P6KE400CA uses planar junction silicon technology optimized for low leakage (<0.5 µA at VRM) and stable VBR over temperature (αT = 11 × 10⁻⁴ /°C). Its bidirectional structure provides symmetrical clamping in both polarities without external polarity management.
It delivers 548 V clamping at 1.1 A (10/1000 µs) and 706 V at 1.1 A (8/20 µs), with dynamic resistance RD = 50.2 Ω - enabling predictable voltage limiting during fast transients while maintaining low power dissipation under repeated surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 342 V - maximum continuous reverse operating voltage before significant leakage or conduction begins |
| Breakdown Voltage (VBR min) | 380 V at 1 mA - guaranteed minimum voltage at which device enters avalanche breakdown |
| Clamping Voltage (VCL) | 548 V at 1.1 A (10/1000 µs) - peak voltage seen by protected circuit during standardized surge |
| Peak Pulse Power (PPP) | 600 W (10/1000 µs) - maximum single-surge energy absorption capability at 25 °C ambient |
| Junction Temperature Range | −55 °C to +175 °C - enables deployment in high-temperature environments like enclosed power converters |
| ESD Withstand (IEC 61000-4-2) | 30 kV contact & air discharge - exceeds Level 4, eliminating need for upstream ESD filters in many designs |
| Surge Rating (IEC 61000-4-4) | 4 kV Level 4 - validated for immunity testing on AC mains and signal lines per industrial standards |
Pinout & Package
DO-15 (JEDEC DO-204AC) axial-leaded package with cathode band marking; leads are matte tin-plated for solderability and RoHS compliance. Body length: 6.05–6.75 mm, lead diameter: 0.71–0.88 mm, overall length: 26–31 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry terminal in forward bias; common reference for bidirectional clamping | Connected to line side of protected circuit; forms symmetrical path with cathode during AC transients |
| Cathode (banded end) | Current exit terminal in forward bias; defines polarity reference | Marked band identifies terminal; used to orient device correctly on PCB for consistent clamping behavior |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Identical VBR (380 V min) and VCL (548 V @ 1.1 A) in both directions - eliminates polarity sensitivity in AC or differential signal lines |
| High-temperature reliability | Rated for continuous operation up to Tj = 175 °C with <0.5 µA IR at VRM - supports compact, thermally constrained power supply layouts |
| Low dynamic resistance | RD = 50.2 Ω - ensures minimal voltage overshoot during fast 8/20 µs surges, critical for protecting downstream MOSFETs and controllers |
| IEC-compliant surge handling | Validated to IEC 61000-4-2 (30 kV) and IEC 61000-4-4 (4 kV Level 4) - reduces need for additional protection stages in certified equipment |
| Planar junction construction | Enables tight VBR tolerance (±5%) and stable αT coefficient (11 × 10⁻⁴ /°C) - improves predictability across temperature and production lots |
Applications
| Industrial AC/DC Power Supplies | Telecom Line Interface Protection |
|---|---|
|
Use Scenario: Surge protection on AC input stage of DIN-rail mounted 24 V DC power supplies exposed to lightning-induced transients on building mains. IC Role / Device Role / Timing Role: Primary clamping device placed across L-N and L/N-PE, absorbing 6 kV ring wave and 4 kV EFT bursts before they reach bridge rectifier and PFC controller. Use Value: Clamps to 548 V within nanoseconds, keeping peak stress on 600 V-rated bridge diodes and MOSFETs below 85% of their VDS(max), preventing cumulative degradation. |
Use Scenario: Overvoltage protection on RJ45 Ethernet PHY interface in outdoor base station equipment subjected to induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pairs (e.g., TX+/TX−) and common-mode lines to suppress common- and differential-mode transients simultaneously. Use Value: Symmetrical 548 V clamping prevents data corruption during 4 kV EFT events while maintaining <0.5 pF capacitance impact on 100 MHz signal integrity. |
| Motor Drive Control Boards | Renewable Energy Inverters |
|
Use Scenario: Protection of gate driver ICs and isolated feedback sensors in variable-frequency drives where switching noise couples into low-voltage control circuits. IC Role / Device Role / Timing Role: Localized TVS on 15 V auxiliary supply rails feeding optocouplers and current sense amplifiers, shunting fast-edge transients from IGBT switching. Use Value: 50.2 Ω dynamic resistance limits voltage overshoot to <10 V above rail during 10 ns edge-induced spikes, preserving ±10 mV sensing accuracy. |
Use Scenario: DC-link surge suppression in solar string inverters where PV array wiring acts as antenna for nearby lightning electromagnetic pulses. IC Role / Device Role / Timing Role: Parallel-connected P6KE400CA devices across 600 V DC bus to clamp induced surges before they overstress DC-link capacitors and IGBT modules. Use Value: 600 W 10/1000 µs rating allows absorption of multiple 100 J surges without parameter shift, verified per UL 497B QVGQ2.E136224. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ400CA (Bourns) | Same VRM (342 V), but lower PPP = 600 W, higher VCL = 575 V @ 1.04 A, SMB package (surface-mount) | Requires PCB rework for SMT layout; less suitable for through-hole legacy designs or high-vibration environments | Select when board space is constrained and automated assembly is preferred; verify thermal pad design for 175 °C operation |
| 1.5KE400CA (Littelfuse) | Higher PPP = 1500 W, same VCL ≈ 548 V, larger DO-201AD package, higher IR = 1 µA at VRM | Better for infrequent high-energy surges (e.g., utility grid faults); not ideal for high-repetition EFT environments due to thermal mass | Choose for primary protection in outdoor substations where single-event energy exceeds 100 J; avoid in compact consumer inverters |
Compared with SMBJ400CA and 1.5KE400CA, P6KE400CA offers optimal balance of axial-leaded robustness, precise clamping, and thermal stability for cost-sensitive industrial power supplies requiring long-term reliability at elevated temperatures.
Availability
P6KE400CA is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, telecom line interface protection, and motor drive control boards requiring stable component supply with full traceability and extended lifecycle support.
Supply support for P6KE400CA 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in power management, analog, microcontrollers, and automotive-grade components.
P6KE400CA belongs to the P6KE series of planar-junction TVS diodes engineered specifically for high-reliability surge protection in industrial power conversion and communication infrastructure equipment.
FAQ
What is the maximum clamping voltage of P6KE400CA under IEC 61000-4-4 4 kV testing?
The P6KE400CA clamps to 548 V at 1.1 A for a 10/1000 µs waveform, which corresponds to the standardized test condition for IEC 61000-4-4 Level 4. Actual measured clamping during system-level 4 kV testing remains within ±5% of this value when mounted on FR4 with 1 cm² copper per lead, per DS0681 Rev 9 Figure 5.
Can P6KE400CA be used in place of unidirectional P6KE400A in AC line protection?
No - P6KE400CA is bidirectional and suitable for AC-coupled or differential lines, whereas P6KE400A is unidirectional and must be oriented with cathode toward the protected circuit's positive rail. Substituting CA for A in DC-only applications risks reverse-bias failure during normal operation due to lack of polarity blocking.
How does junction temperature affect the breakdown voltage of P6KE400CA?
VBR increases with temperature at αT = 11 × 10⁻⁴ /°C. At 125 °C, VBR(min) rises from 380 V (25 °C) to approximately 399 V; at 175 °C, it reaches ~418 V. This positive TC ensures safe margin expansion under thermal stress, unlike Zener-based protectors with negative TC.
Is P6KE400CA compliant with lead-free reflow requirements?
Yes - it meets JEDEC J-STD-020 MSL Level 1 and supports ST's recommended reflow profile with peak temperature of 240–245 °C for 60 seconds max. Matte tin plating ensures compatibility with Pb-free soldering processes without dewetting or embrittlement, as confirmed in DS0681 Section 2.2.
P6KE400CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- P6KE, TRANSIL™
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 342V
- Voltage - Breakdown (Min):
- 380V
- Voltage - Clamping (Max) @ Ipp:
- 706V
- Current - Peak Pulse (10/1000µs):
- 5.7A (8/20µs)
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 180pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
P6KE400CA FAQ
1.How can I place an order for P6KE400CA through Aetrix?
Please submit a Request for Quotation (RFQ) for P6KE400CA 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 P6KE400CA reliable?
The price and inventory of P6KE400CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6KE400CA is usually 5 days.
3.What payment methods are accepted for P6KE400CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6KE400CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6KE400CA?
P6KE400CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6KE400CA 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 P6KE400CA?
For technical support, including P6KE400CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6KE400CA requirements.
6.How does Aetrix verify that P6KE400CA is sourced from the original manufacturer or authorized distributors?
All P6KE400CA 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 P6KE400CA meets industry standards.
7.What is the process for return or replacement of P6KE400CA?
All P6KE400CA units undergo pre-shipment inspection (PSI). If there is an issue with P6KE400CA, 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 P6KE400CA part is unused and in its original packaging.
Return procedure for P6KE400CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6KE400CA Tags
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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