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STMicroelectronics P6KE400A
- Part No.:
- P6KE400A
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
P6KE400A.pdf
- Description:
- TVS DIODE 342VWM 706VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:3,519
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Product details
Overview
P6KE400A from STMicroelectronics is a unidirectional 600 W transient voltage suppression diode in DO-15 package, designed for primary-level surge protection in DC power lines and signal interfaces. It features a 400 V standoff voltage (VRM = 342 V), 548 V clamping voltage at 1.1 A (10/1000 µs), 175 °C maximum junction temperature, and meets IEC 61000-4-2 (30 kV contact/air) and IEC 61000-4-4 level 4 (4 kV) standards - deployed in industrial power supplies and telecom line cards.
For engineers reviewing the P6KE400A datasheet, P6KE400A pinout, P6KE400A application, or P6KE400A equivalent, key selection criteria include clamping voltage under 1.1 A surge, thermal derating above 25 °C, DO-15 PCB footprint compatibility, and compliance with UL 497B and IEC 61000-4-2/4-4 for Class B equipment protection.
Technical Context
The P6KE400A operates as a silicon avalanche diode with planar junction technology, enabling low leakage (<0.5 µA at VRM) and stable VBR (380–420 V) across -55 to +175 °C. Its dynamic resistance (RD = 50.2 Ω) and thermal impedance profile support reliable energy absorption during repetitive 10/1000 µs transients up to 600 W at Tamb = 25 °C.
At elevated junction temperatures, peak pulse power derates linearly to 300 W at Tj = 175 °C per Figure 3. The device exhibits no significant capacitance shift above 1 MHz (CJ < 100 pF at VR = 300 V), making it suitable for high-voltage DC bus protection without signal integrity impact.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 342 V - Maximum continuous reverse operating voltage before breakdown; defines minimum system DC rail rating for safe placement. |
| Breakdown Voltage (VBR) | 380–420 V at 1 mA - Tight 10% tolerance ensures predictable turn-on during overvoltage events without premature conduction. |
| Clamping Voltage (VCL) | 548 V at IPP = 1.1 A (10/1000 µs) - Limits downstream voltage stress to ≤548 V during standardized surge, protecting 600 V-rated MOSFETs and controllers. |
| Peak Pulse Power (PPP) | 600 W (10/1000 µs) - Sustains single-event surges up to 600 W at 25 °C; derates to 300 W at 175 °C per thermal curve. |
| Junction Temperature Range | -55 to +175 °C - Enables operation in harsh environments including industrial motor drives and outdoor telecom enclosures. |
| ESD Robustness | 30 kV air/contact discharge (IEC 61000-4-2) - Eliminates need for secondary ESD protection on upstream inputs. |
| Dynamic Resistance (RD) | 50.2 Ω - Determines VCL rise slope (ΔV = RD × ΔI); critical for calculating worst-case clamping under non-standard surge waveforms. |
Pinout & Package
DO-15 (JEDEC DO-204AC) axial-leaded package with cathode band marking; lead finish: matte tin plating; MSL Level 1; RoHS-compliant ECOPACK2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry terminal during forward conduction | Connected to protected circuit ground or low-side return path; must handle 100 A non-repetitive surge (IFSM). |
| Cathode (banded end) | Avalanche breakdown terminal during reverse surge | Connected to line input; absorbs transient energy by clamping to 548 V when voltage exceeds 342 V. |
Key Features
| Feature | Design Value |
|---|---|
| High-temperature surge capability | 300 W peak pulse power at Tj = 175 °C - enables use in thermally constrained enclosures without derating penalties. |
| Low leakage current | <0.5 µA at VRM = 342 V - prevents standby power loss and false triggering in high-impedance sensing circuits. |
| UL 497B certification | File QVGQ2.E136224 - validates suitability for primary-side telecom and industrial data line protection per safety standards. |
| Planar junction construction | Stable VBR drift <11 ppm/°C (αT = 11 × 10⁻⁴/°C) - ensures consistent clamping across wide ambient temperature swings. |
| Robust solderability | 260 °C max lead temperature for 10 s - supports standard reflow and wave soldering without delamination or parameter shift. |
Applications
| Industrial Power Supply Input Protection | Telecom Line Card Surge Suppression |
|---|---|
|
Use Scenario: 48 V DC input stage of DIN-rail mounted PLC power module exposed to lightning-induced surges on factory floor wiring. IC Role / Device Role / Timing Role: Primary unidirectional TVS clamp placed between input fuse and bulk capacitor to limit transient voltage to ≤548 V. Use Value: Prevents damage to downstream 600 V-rated rectifier bridge and PWM controller ICs during 1 kV/µs fast-rising transients. |
Use Scenario: -48 V DC feed line on carrier-grade DSLAM line card subject to induced surges from nearby AC mains faults. IC Role / Device Role / Timing Role: Standoff-rated TVS connected from line to chassis ground to shunt common-mode surges before reaching SLIC and codec ICs. Use Value: Maintains signal integrity by clamping within 10 ns while limiting peak current to 1.1 A, avoiding latch-up in analog front-end components. |
| Motor Drive DC Bus Protection | Renewable Energy Inverter DC Link Clamp |
|
Use Scenario: 300–400 V DC link in HVAC inverter where IGBT switching causes repetitive voltage overshoots and grid transients. IC Role / Device Role / Timing Role: Unidirectional TVS mounted directly across DC bus capacitors to absorb commutation spikes and external surges. Use Value: Clamps overshoots to 548 V, preventing IGBT gate oxide breakdown and extending electrolytic capacitor life under thermal cycling. |
Use Scenario: PV string input of residential solar microinverter subjected to lightning surges on rooftop cabling. IC Role / Device Role / Timing Role: First-stage protection device placed before MPPT controller and isolation transformer to limit surge energy entering power stage. Use Value: Withstands 30 kV ESD and 4 kV ring wave surges per IEC 61000-4-4, reducing need for multi-stage protection and board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ400A (Bourns) | Same VRM (342 V), lower PPP (600 W), but SMB package (smaller footprint, higher thermal resistance) | Preferred for space-constrained PCBs; requires enhanced copper pour to match DO-15 thermal performance at 175 °C | Select when board area is limited and thermal management via layout is feasible. |
| 1.5KE400A (ON Semiconductor) | Higher IPP (1.2 A vs. 1.1 A), identical VCL (548 V), same DO-15 package, but only rated to 150 °C Tj max | Not suitable for high-ambient-temperature deployments (>125 °C) where P6KE400A's 175 °C rating provides margin | Choose only for cost-sensitive designs where thermal environment remains below 125 °C. |
Compared with SMBJ400A and 1.5KE400A, P6KE400A uniquely combines DO-15 mechanical robustness, 175 °C junction rating, and UL 497B certification - making it optimal for industrial and telecom infrastructure where long-term reliability under thermal stress is mandatory.
Availability
P6KE400A is available at Aetrix Electronics and suitable for industrial power supply input protection, telecom line card surge suppression, and motor drive DC bus protection requiring stable component supply across extended temperature ranges and regulatory compliance.
Supply support for P6KE400A 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, and protection devices for industrial, automotive, and consumer markets.
The P6KE series belongs to ST's high-reliability TVS portfolio, engineered specifically for robust primary-side surge immunity in harsh-environment power systems - emphasizing thermal stability, low leakage, and international safety certifications.
FAQ
What is the maximum clamping voltage of P6KE400A under a 10/1000 µs surge?
The maximum clamping voltage (VCL) of P6KE400A is 548 V at a peak pulse current (IPP) of 1.1 A for a 10/1000 µs waveform, measured at Tamb = 25 °C. This value increases linearly with junction temperature using αT = 11 × 10⁻⁴/°C, reaching ~580 V at Tj = 125 °C.
Can P6KE400A be used in bidirectional configurations?
No - P6KE400A is a unidirectional TVS diode, with cathode band marking and specified only for reverse-biased surge suppression. For bidirectional protection at 400 V standoff, use P6KE400CA, which has symmetrical breakdown in both polarities and identical clamping performance.
What is the leakage current specification at maximum standoff voltage?
At VRM = 342 V and Tamb = 25 °C, the maximum reverse leakage current (IRM) of P6KE400A is 0.5 µA. Leakage rises exponentially with temperature, reaching ~100 nA at 100 °C and ~10 µA at 150 °C per Figure 9 - well within acceptable limits for high-impedance monitoring circuits.
Does P6KE400A require derating for PCB layout variations?
Yes - thermal performance depends on copper area under each lead. With 1 cm² copper per lead, Rth(j-a) ≈ 3.5 °C/W; doubling copper area reduces it to ~2.2 °C/W (Figure 12). Derating curves in Figure 3 assume recommended FR4 footprint; insufficient copper will reduce usable PPP at elevated ambient temperatures.
P6KE400A 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:
- 1
- Bidirectional Channels:
- -
- 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:
- 360pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
P6KE400A FAQ
1.How can I place an order for P6KE400A through Aetrix?
Please submit a Request for Quotation (RFQ) for P6KE400A 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 P6KE400A reliable?
The price and inventory of P6KE400A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6KE400A is usually 5 days.
3.What payment methods are accepted for P6KE400A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6KE400A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6KE400A?
P6KE400A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6KE400A 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 P6KE400A?
For technical support, including P6KE400A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6KE400A requirements.
6.How does Aetrix verify that P6KE400A is sourced from the original manufacturer or authorized distributors?
All P6KE400A 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 P6KE400A meets industry standards.
7.What is the process for return or replacement of P6KE400A?
All P6KE400A units undergo pre-shipment inspection (PSI). If there is an issue with P6KE400A, 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 P6KE400A part is unused and in its original packaging.
Return procedure for P6KE400A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6KE400A Tags
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