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Vishay General Semiconductor - Diodes Division P6SMB400A-M3/5B
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- Part No.:
- P6SMB400A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB400A-M3/5B.pdf
- Description:
- TVS DIODE 342VWM 548VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,409
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Product details
Overview
P6SMB400A-M3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, rated for 400 V standoff voltage (VWM), 420 V minimum breakdown voltage (VBR), and 600 W peak pulse power (10/1000 μs). It clamps transients to 548 V at 1.10 A peak pulse current and operates across -65 °C to +150 °C junction temperature - deployed for overvoltage protection of high-voltage DC rails in industrial power supplies and telecom rectifier modules.
For engineers reviewing the P6SMB400A-M3/5B datasheet, P6SMB400A-M3/5B pinout, P6SMB400A-M3/5B application, or P6SMB400A-M3/5B equivalent, key selection criteria include its 400 V stand-off rating, unidirectional polarity with cathode band marking, halogen-free RoHS-compliant M3 suffix, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads per terminal.
Technical Context
This TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1 ns) and low incremental surge resistance, enabling effective clamping of fast-rising transients induced by inductive switching or lightning surges. Its unidirectional configuration supports DC-biased protection paths where reverse conduction must be blocked.
The device is rated for 600 W peak pulse power under the standardized 10/1000 μs waveform at 0.01 % duty cycle, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), requiring careful PCB pad design to sustain repetitive surge events without thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 400 V - maximum continuous reverse operating voltage before clamping initiates; defines upper limit of protected DC rail. |
| VBR (Breakdown) | 380–420 V at 1 mA - voltage range at which avalanche conduction begins; ensures predictable turn-on margin above VWM. |
| VC (Clamping) | 548 V at IPPM = 1.10 A - maximum voltage seen across protected circuit during specified 10/1000 μs transient; determines stress on downstream components. |
| PPPM | 600 W - peak transient energy handling capability under standard waveform; validates suitability for IEC 61000-4-5 Level 4 surge immunity. |
| Package | SMB (DO-214AA) - surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; optimized for automated pick-and-place and reflow. |
| RoHS Status | Halogen-free, RoHS-compliant (M3 suffix) - meets environmental compliance requirements for commercial-grade applications without brominated flame retardants. |
| TJ max. | +150 °C - maximum junction temperature; enables operation in high-ambient environments such as enclosed power converters or outdoor telecom cabinets. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-potential node; completes conduction path during reverse-biased transient clamp event. |
| Cathode | High-side connection point | Connected to protected line (e.g., +400 V DC rail); polarity marking ensures correct orientation to block forward leakage and enable reverse avalanche. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against high-energy surges in telecom and industrial DC systems without derating at 25 °C ambient. |
| Glass passivated chip junction | Ensures stable avalanche characteristics and long-term reliability under repeated transient stress, critical for field-deployed equipment. |
| MSL Level 1 (260 °C peak reflow) | Supports single-reflow assembly without moisture sensitivity concerns, eliminating bake-out steps in high-volume manufacturing. |
| Unidirectional polarity with cathode band | Prevents misorientation during automated placement and blocks forward conduction in DC-coupled protection circuits. |
| Halogen-free, RoHS-compliant (M3) | Fulfills environmental compliance for global commercial deployments while maintaining identical electrical performance to E3 variants. |
Applications
| Industrial Power Supply Protection | Telecom Rectifier Module Clamping |
|---|---|
Use Scenario: Protecting 400 V DC output rails in switch-mode power supplies against load-dump and inductive kickback transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed across output capacitor bank to clamp voltage spikes before they reach downstream regulators or capacitors. Use Value: Limits transient voltage to ≤548 V, preventing overvoltage failure of 630 V-rated electrolytic capacitors and MOSFETs in the output stage. |
Use Scenario: Safeguarding AC/DC rectifier outputs in central office telecom power systems exposed to lightning-induced surges on distribution lines. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between rectified DC bus and chassis ground to shunt surge energy away from control ICs and isolation barriers. Use Value: Withstands 600 W pulses without degradation, maintaining system uptime during IEC 61000-4-5 4 kV surge tests. |
| High-Voltage Sensor Interface Protection | Motor Drive DC Link Surge Suppression |
Use Scenario: Shielding precision analog front-ends of HV sensors (e.g., battery stack monitors) from coupling noise and ESD events on 300–500 V measurement inputs. IC Role / Device Role / Timing Role: High-VWM TVS placed at input filter stage to absorb fast transients before RC filtering and ADC input stages. Use Value: 400 V VWM avoids false triggering during normal operation while clamping sub-μs ESD events to safe levels for 16-bit SAR ADCs. |
Use Scenario: Mitigating voltage overshoot on DC link capacitors caused by regenerative braking or IGBT switching in 400 V-class motor drives. IC Role / Device Role / Timing Role: Unidirectional TVS mounted directly across DC bus terminals to clamp commutation spikes and prevent IGBT desaturation faults. Use Value: 548 V clamping voltage stays below 600 V IGBT collector-emitter rating, avoiding destructive avalanche during dynamic braking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ400A | Same VWM (400 V), identical SMB package, but lower PPPM (600 W same), higher VC (574 V at 1.05 A). | Higher clamping voltage reduces margin for downstream 600 V-rated devices; less suitable where tight voltage headroom exists. | Select P6SMB400A-M3/5B when lower clamping (548 V) is required to protect sensitive 600 V components. |
| 1.5SMC400A | Larger SMC (DO-214AB) package, same VWM/VC ratings, but higher thermal mass and RθJA = 40 °C/W vs. 100 °C/W. | Better suited for high-repetition-rate surges in thermally constrained layouts; requires larger PCB area. | Choose P6SMB400A-M3/5B for space-constrained designs needing SMB footprint and verified MSL Level 1 reflow compatibility. |
Compared with SMBJ400A and 1.5SMC400A, the P6SMB400A-M3/5B delivers tighter clamping (548 V), halogen-free compliance, and optimal footprint efficiency for high-density industrial PCBs - making it preferred where layout area, environmental compliance, and precise voltage limiting are jointly critical.
Availability
P6SMB400A-M3/5B is available at Aetrix Electronics and suitable for industrial power supplies, telecom rectifier modules, high-voltage sensor interfaces, and motor drive DC link protection requiring stable component supply and full traceability.
Supply support for P6SMB400A-M3/5B 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, and protection devices with emphasis on reliability, ruggedness, and application-specific optimization.
The P6SMB Series targets cost-sensitive, high-volume transient suppression needs in commercial and industrial systems, delivering standardized 600 W surge capability in compact SMB packages with multiple environmental and qualification options.
FAQ
What is the maximum clamping voltage of the P6SMB400A-M3/5B under a 10/1000 μs surge?
The P6SMB400A-M3/5B clamps to a maximum of 548 V when subjected to its rated peak pulse current of 1.10 A under the standardized 10/1000 μs waveform. This value is measured at the device terminals with specified mounting conditions (0.2" × 0.2" copper pads), and defines the upper voltage limit imposed on protected circuitry during transient events. The P6SMB400A-M3/5B maintains this clamping performance across its operational temperature range.
Is the P6SMB400A-M3/5B suitable for automotive applications?
The P6SMB400A-M3/5B is a commercial-grade part with halogen-free RoHS compliance (M3 suffix) but is not AEC-Q101 qualified. For automotive use, Vishay offers the P6SMB400AHM3_D/I variant - which shares the same electrical specs but adds AEC-Q101 qualification and uses the "D" revision code for high-voltage variants. The P6SMB400A-M3/5B itself is intended for industrial, telecom, and computing applications where automotive qualification is not required.
How does the M3 suffix affect the P6SMB400A-M3/5B compared to the E3 version?
The M3 suffix on the P6SMB400A-M3/5B indicates halogen-free, RoHS-compliant construction - achieved without compromising electrical performance or package dimensions versus the E3 variant. Both meet JESD 201 Class 2 whisker resistance and MSL Level 1 reflow specifications. The P6SMB400A-M3/5B is functionally interchangeable with P6SMB400A-E3/5B in non-halogen-restricted designs, but required where brominated flame retardants are prohibited.
What is the thermal resistance of the P6SMB400A-M3/5B, and how does it impact layout design?
The P6SMB400A-M3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W. Because its surge capability depends on heat dissipation, PCB layout must use minimum 5.0 mm × 5.0 mm copper pads per terminal - as specified in the datasheet - to avoid exceeding the 150 °C maximum junction temperature during repetitive 600 W pulses. Smaller pads significantly reduce safe surge repetition rate.
Can the P6SMB400A-M3/5B be used in bidirectional configurations?
No - the P6SMB400A-M3/5B is strictly unidirectional, as indicated by the "A" suffix and cathode band marking. Bidirectional operation requires the "CA" suffix (e.g., P6SMB400CA). Using the P6SMB400A-M3/5B in reverse-biased AC applications would result in forward conduction and potential failure. Always verify polarity marking and suffix before integration; the P6SMB400A-M3/5B is designed only for DC rail protection with defined anode/cathode orientation.
P6SMB400A-M3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Active
- 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 (SMBJ)
P6SMB400A-M3/5B FAQ
1.How can I place an order for P6SMB400A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB400A-M3/5B 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-M3/5B reliable?
The price and inventory of P6SMB400A-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB400A-M3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB400A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB400A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB400A-M3/5B?
P6SMB400A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB400A-M3/5B 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-M3/5B?
For technical support, including P6SMB400A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB400A-M3/5B requirements.
6.How does Aetrix verify that P6SMB400A-M3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB400A-M3/5B 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-M3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB400A-M3/5B?
All P6SMB400A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB400A-M3/5B, 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-M3/5B part is unused and in its original packaging.
Return procedure for P6SMB400A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB400A-M3/5B Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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