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Vishay General Semiconductor - Diodes Division P6SMB400A-E3/5B
- Part No.:
- P6SMB400A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB400A-E3/5B.pdf
- Description:
- TVS DIODE 342VWM 548VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,366
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Product details
Overview
P6SMB400A-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for high-voltage transient protection in power rails and signal lines. It features a 400 V standoff voltage (VWM), 420 V minimum breakdown voltage (VBR), 548 V maximum clamping voltage (VC) at 1.10 A peak pulse current (IPPM), and 600 W peak pulse power capability with a 10/1000 μs waveform - suitable for protecting industrial power supplies and telecom rectifier stages against lightning-induced surges.
For engineers reviewing the P6SMB400A-E3/5B datasheet, P6SMB400A-E3/5B pinout, P6SMB400A-E3/5B application, or P6SMB400A-E3/5B equivalent, key selection criteria include its unidirectional polarity, SMB (DO-214AA) package compatibility, 1.0 μA max reverse leakage at VWM, 100 °C/W junction-to-ambient thermal resistance, and AEC-Q101 qualification eligibility via HE3/HM3 variants.
Technical Context
This TVS diode operates as a clamping device that remains non-conductive below its 400 V standoff voltage and rapidly transitions to low-impedance conduction above its 420 V breakdown threshold, limiting transient energy to safe levels. Its glass-passivated junction ensures stable performance under repetitive surge stress and meets J-STD-020 MSL Level 1 reflow requirements up to 260 °C peak temperature.
The device delivers 600 W peak pulse power handling with a 10/1000 μs waveform at 0.01 % duty cycle, exhibits a +0.110 %/°C temperature coefficient of VBR, and maintains ≤1.0 μA reverse leakage at rated VWM - enabling reliable overvoltage protection in high-impedance sensing circuits and DC bus monitoring paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 400 V - Maximum continuous reverse operating voltage before significant leakage; defines upper limit of normal circuit operation. |
| VBR (Breakdown Voltage) | 420–462 V at 1.0 mA test current - Voltage at which device enters avalanche conduction; ensures predictable clamping onset. |
| VC (Clamping Voltage) | 548 V at IPPM = 1.10 A - Peak voltage seen across protected circuit during worst-case transient; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 600 W with 10/1000 μs waveform - Energy absorption capacity per transient event; supports IEC 61000-4-5 Level 4 compliance when properly mounted. |
| ID (Reverse Leakage) | ≤1.0 μA at VWM - Minimal standby current draw; critical for low-power battery-backed systems and precision reference circuits. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs derating above 25 °C ambient. |
| TJ max. | +150 °C - Maximum allowable junction temperature; enables operation in high-temperature industrial enclosures. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to lower-potential side of protected line | Provides path for surge current into ground or return rail during clamping; must be routed with low-inductance trace. |
| Cathode | Current exit point in forward bias; marked with band; connected to higher-potential side | Serves as reference node for clamping action; ties to protected IC supply rail or signal line requiring overvoltage suppression. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power rating | Enables robust protection against IEC 61000-4-5 combined wave surges (e.g., 2 Ω source impedance, 1.2/50 μs voltage + 8/20 μs current) without degradation. |
| Glass passivated junction | Ensures long-term stability of breakdown characteristics and low parameter drift over temperature and lifetime cycling. |
| MSL Level 1 moisture sensitivity | Allows direct placement onto PCB without baking; compatible with standard SMT reflow profiles up to 260 °C peak. |
| Unidirectional polarity | Supports DC-biased applications such as power supply input rails, where reverse conduction must be blocked during normal operation. |
| RoHS-compliant E3 suffix | Meets EU Directive 2011/65/EU and JESD201 Class 2 whisker resistance; suitable for commercial-grade industrial electronics. |
Applications
| Industrial Power Supply Input Protection | Telecom Rectifier Stage Surge Suppression |
|---|---|
Use Scenario: Protecting AC/DC front-end rectifiers and bulk capacitors from lightning-induced surges on 380–480 VAC distribution lines. IC Role / Device Role / Timing Role: Clamping transient overvoltages on DC bus outputs of bridge rectifiers before they reach downstream switching controllers or bulk storage. Use Value: Limits peak bus voltage to ≤548 V during 6 kV/3 kA surge events, preventing MOSFET avalanche failure and electrolytic capacitor overvoltage rupture. |
Use Scenario: Safeguarding -48 V DC telecom power systems against induced transients from nearby lightning strikes or relay switching noise. IC Role / Device Role / Timing Role: Unidirectional TVS placed between -48 V rail and chassis ground to clamp positive-going spikes while blocking reverse conduction. Use Value: Maintains system uptime by absorbing 600 W surges without latch-up, preserving integrity of PMBus-controlled DC/DC converters and hot-swap controllers. |
| High-Voltage Sensor Signal Conditioning | Motor Drive DC Link Monitoring Circuit Protection |
Use Scenario: Shielding isolated voltage dividers and ADC front-ends measuring 300–450 V DC bus voltages in EV chargers and solar inverters. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 μA) clamping element placed across high-impedance sense resistors to prevent transient-induced ADC saturation or op-amp damage. Use Value: Preserves measurement accuracy by limiting fault voltage to 548 V while contributing negligible error (<0.001 %) to nominal 400 V measurements. |
Use Scenario: Protecting isolated gate drivers and current shunt amplifiers monitoring 400 V DC link in servo motor drives and industrial VFDs. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) TVS placed across differential sense inputs to suppress common-mode transients coupled from IGBT switching edges. Use Value: Prevents false triggering of overcurrent shutdown logic by clamping transients within 100 ns, maintaining real-time control loop stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ400A | Same VWM (400 V), lower PPPM (400 W), larger SMA package (DO-214AC), higher RθJA (140 °C/W) | Limited to lower-energy transients; less effective in high-repetition-rate industrial environments | Select when board space allows larger footprint and thermal budget permits higher junction temperature rise. |
| SMCJ400A | Same VWM (400 V), higher PPPM (1500 W), larger SMC package (DO-214AB), lower RθJA (35 °C/W) | Better suited for high-duty-cycle surge environments but requires 3× PCB area vs. SMB | Choose for mission-critical 400 V rail protection where sustained surge repetition or elevated ambient temperatures exist. |
Compared with SMAJ400A and SMCJ400A, the P6SMB400A-E3/5B offers optimal balance of compact SMB footprint, 600 W surge rating, and commercial-grade RoHS compliance - making it ideal for space-constrained 400 V DC applications where moderate surge immunity and manufacturability are prioritized.
Availability
P6SMB400A-E3/5B is available at Aetrix Electronics and suitable for industrial power supplies, telecom rectifier modules, and high-voltage sensor interfaces requiring stable component supply, consistent parametric performance, and full traceability across production batches.
Supply support for P6SMB400A-E3/5B 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P6SMB Series targets high-voltage transient suppression in industrial, telecom, and automotive power systems, delivering standardized 600 W surge capability in compact SMB packages with AEC-Q101 qualification options.
FAQ
What is the maximum clamping voltage of the P6SMB400A-E3/5B under specified surge conditions?
The P6SMB400A-E3/5B has a maximum clamping voltage (VC) of 548 V when subjected to its rated peak pulse current (IPPM) of 1.10 A using a 10/1000 μs waveform. This value is measured at TA = 25 °C with the device mounted on 0.2" × 0.2" copper pads per JEDEC standards and defines the highest voltage the protected circuit will experience during a worst-case transient event. The P6SMB400A-E3/5B maintains this clamping performance across its full operating temperature range.
Is the P6SMB400A-E3/5B suitable for automotive applications?
The base P6SMB400A-E3/5B is a commercial-grade RoHS-compliant part and not AEC-Q101 qualified. However, Vishay offers automotive-qualified variants - P6SMB400AHE3_B and P6SMB400AHM3_B - which share identical electrical specifications but undergo additional stress testing and traceability controls. For automotive use, specify the HE3 or HM3 suffix with appropriate revision code (e.g., _B); the P6SMB400A-E3/5B itself is intended for industrial and telecom applications.
How does the thermal resistance of the P6SMB400A-E3/5B affect its power derating?
The P6SMB400A-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on standard 0.2" × 0.2" copper pads. At ambient temperatures above 25 °C, its 5.0 W steady-state power dissipation must be linearly derated by 40 mW/°C - meaning at 75 °C ambient, maximum continuous power drops to 3.0 W. This derating directly impacts sustained surge repetition rate capability and must be factored into thermal design alongside PCB copper area and airflow. The P6SMB400A-E3/5B datasheet provides full derating curves in Figure 2.
What is the significance of the "E3/5B" suffix in P6SMB400A-E3/5B?
The "E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads meeting JESD201 Class 2 whisker resistance. The "5B" indicates packaging in a 13-inch diameter plastic tape-and-reel format containing 3200 units - optimized for high-volume automated SMT placement. This differs from "52" (7-inch reel, 750 units) and ensures compatibility with large-scale production feeders. The P6SMB400A-E3/5B thus combines environmental compliance with manufacturing scalability.
Does the P6SMB400A-E3/5B have bidirectional capability?
No, the P6SMB400A-E3/5B is a unidirectional TVS diode, as indicated by the "A" suffix (not "CA"). It conducts only in reverse bias above its breakdown voltage and blocks current in forward bias - making it suitable for DC-biased applications like power supply inputs. Bidirectional versions (e.g., P6SMB400CA) are available for AC-coupled or floating signal lines, but the P6SMB400A-E3/5B must be oriented with cathode toward the higher-potential side of the protected circuit.
P6SMB400A-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 342V
- Voltage - Breakdown (Min):
- 380V
- Voltage - Clamping (Max) @ Ipp:
- 548V
- Current - Peak Pulse (10/1000µs):
- 1.1A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB400A-E3/5B FAQ
1.How can I place an order for P6SMB400A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB400A-E3/5B 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 P6SMB400A-E3/5B reliable?
The price and inventory of P6SMB400A-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB400A-E3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB400A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB400A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB400A-E3/5B?
P6SMB400A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB400A-E3/5B 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 P6SMB400A-E3/5B?
For technical support, including P6SMB400A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB400A-E3/5B requirements.
6.How does Aetrix verify that P6SMB400A-E3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB400A-E3/5B 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 P6SMB400A-E3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB400A-E3/5B?
All P6SMB400A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB400A-E3/5B, 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 P6SMB400A-E3/5B part is unused and in its original packaging.
Return procedure for P6SMB400A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB400A-E3/5B Tags
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