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Vishay General Semiconductor - Diodes Division P4SMA400A-M3/61
- Part No.:
- P4SMA400A-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA400A-M3/61.pdf
- Description:
- TVS DIODE 342VWM 548VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,079
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Product details
Overview
P4SMA400A-M3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for high-voltage transient protection in power rails and interface lines. It features a 400 V standoff voltage (VWM), 420 V minimum breakdown voltage (VBR), 548 V maximum clamping voltage (VC) at 0.55 A peak pulse current (IPPM), and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for protecting MOSFETs, IGBTs, and industrial power supplies against lightning-induced surges and inductive switching transients.
For engineers reviewing the P4SMA400A-M3/61 datasheet, P4SMA400A-M3/61 pinout, P4SMA400A-M3/61 application, or P4SMA400A-M3/61 equivalent, this device delivers verified clamping performance at 400 V nominal system voltage, halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification (Revision B), supporting design-in for automotive power modules and ruggedized industrial controls where high-VWM TVS robustness is required.
Technical Context
The P4SMA400A-M3/61 operates as a unidirectional avalanche diode with cathode-band polarity marking, leveraging glass-passivated junction technology for stable breakdown and low leakage (<1 µA at VWM). Its thermal resistance (RθJA = 120 °C/W) and junction temperature limit (TJ max = 150 °C) define derating behavior above 25 °C ambient per Figure 2.
It sustains non-repetitive 10/1000 µs surge pulses up to 400 W on 5.0 mm × 5.0 mm copper pads, with clamping voltage tightly bounded at 548 V under rated IPPM - enabling predictable overvoltage limiting in DC bus protection circuits without sacrificing response time or surge margin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 342 V - Maximum continuous reverse operating voltage before conduction begins; sets upper limit for protected line DC bias. |
| VBR (Breakdown Voltage) | 380–420 V at IT = 1 mA - Confirmed avalanche initiation range; ensures reliable triggering above normal operating voltage. |
| VC (Clamping Voltage) | 548 V at IPPM = 0.55 A - Peak voltage seen by downstream circuit during full-rated surge; defines worst-case stress on protected ICs. |
| PPPM (Peak Pulse Power) | 400 W with 10/1000 µs waveform - Energy-handling capacity for standard lightning/surge test profiles per IEC 61000-4-5. |
| PD (Steady-State Power) | 3.3 W - Continuous dissipation capability on infinite heatsink at 50 °C; informs thermal layout for sustained leakage or repetitive events. |
| TJ max | 150 °C - Maximum allowable junction temperature; constrains PCB copper area and airflow requirements in sealed enclosures. |
| Package | SMA (DO-214AC) - Standardized 2-pin surface-mount outline with 5.28 mm length, 4.50 mm width, and 2.29 mm height; compatible with automated pick-and-place. |
Pinout & Package
SMA (DO-214AC) package: molded epoxy case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C reflow peak), and cathode identified by a band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection in unidirectional configuration | Connected to ground or return path; conducts surge current toward reference plane during overvoltage event. |
| Cathode | High-side connection; marked with band | Connected to protected line (e.g., 380–420 V DC bus); blocks reverse current until VBR exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables single-device protection of 400 V-class industrial power rails against IEC 61000-4-5 Level 3/4 surges without parallel staging. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for automotive and EU industrial equipment without compromising surge robustness. |
| AEC-Q101 qualified (Revision B) | Validated for automotive powertrain and chassis applications including battery management and DC-DC converter inputs. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., relay bounce, MOSFET turn-off), improving protection fidelity. |
| 120 °C/W junction-to-ambient thermal resistance | Guides minimum pad size (0.2" × 0.2") and copper pour design to maintain TJ ≤ 150 °C under worst-case ambient + power dissipation. |
Applications
| Industrial Motor Drive DC Bus Protection | Automotive On-Board Charger Input Stage |
|---|---|
Use Scenario: Protecting IGBT gate drivers and bus sensing circuits from voltage spikes caused by contactor switching and regenerative braking in 400 V traction inverters. IC Role / Device Role / Timing Role: Unidirectional TVS placed across DC+ and DC− rails upstream of filtering; clamps transients within 1 ns response time. Use Value: Limits bus overvoltage to ≤548 V during 400 W surges, preventing damage to 650 V-rated SiC MOSFETs and isolated amplifiers. |
Use Scenario: Safeguarding AC/DC front-end rectifiers and PFC controllers in EV on-board chargers subjected to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 400 V intermediate bus; coordinated with MOVs and fuses for staged protection. Use Value: Maintains <1 µA leakage at 342 V standby, minimizing no-load losses while delivering AEC-Q101 validated reliability over 15-year vehicle life. |
| Telecom Power Shelf Surge Suppression | Railway Signaling Power Interface |
Use Scenario: Secondary-level protection on -48 V or +24 V telecom power distribution boards exposed to induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: Standoff-rated TVS on output of DC/DC converters feeding sensitive baseband processors and PHY ICs. Use Value: Clamps 10/1000 µs transients to 548 V with <0.1 % duty cycle tolerance, preserving signal integrity on 10 Gbps SerDes links. |
Use Scenario: Protecting 110 V DC signaling interfaces in railway control cabinets from EMI coupling and traction return current transients. IC Role / Device Role / Timing Role: High-VWM unidirectional suppressor on field-side I/O lines interfacing with PLCs and safety relays. Use Value: Withstands 342 V continuous operation and 548 V clamping, meeting EN 50121-4 immunity requirements for rolling stock electronics. |
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/VBR/VC ratings but SMB (DO-214AA) package; 600 W PPPM rating; RθJA = 100 °C/W | Higher power handling and lower thermal resistance; requires larger PCB footprint (5.28 mm × 4.57 mm vs. SMA's 5.28 mm × 4.50 mm) | Select when higher surge margin or improved thermal performance is needed and board space permits SMB footprint. |
| 1.5KE400A | Through-hole DO-201AD package; identical electrical specs; 400 W PPPM; RθJA = 50 °C/W on FR-4 | Requires wave soldering or hand assembly; superior heat sinking via leadframe; not SMT-compatible | Choose for legacy through-hole designs or high-reliability military/aerospace systems where mechanical robustness outweighs automation needs. |
Compared with SMBJ400A and 1.5KE400A, the P4SMA400A-M3/61 offers optimal balance of SMT manufacturability, halogen-free compliance, and AEC-Q101 qualification - making it the preferred choice for new automotive and industrial designs requiring RoHS+ reliability in compact SMA form factor.
Availability
P4SMA400A-M3/61 is available at Aetrix Electronics and suitable for industrial motor drives, automotive on-board chargers, and telecom power shelf designs requiring stable component supply, long-term lifecycle support, and halogen-free compliance.
Supply support for P4SMA400A-M3/61 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 P4SMA series targets high-voltage transient suppression in automotive, industrial, and telecom infrastructure, delivering standardized TVS performance across 6.8 V to 540 V with AEC-Q101 qualification and halogen-free variants.
FAQ
What is the maximum clamping voltage of the P4SMA400A-M3/61 under rated surge conditions?
The P4SMA400A-M3/61 has a maximum clamping voltage (VC) of 548 V when subjected to its rated peak pulse current (IPPM) of 0.55 A with a 10/1000 µs waveform. This value is measured per Figure 1 and Table on page 2 of Vishay document 88367, and defines the upper voltage limit imposed on protected circuitry during a full-power transient event. The P4SMA400A-M3/61 maintains this clamping performance consistently across its qualified temperature range.
Is the P4SMA400A-M3/61 suitable for automotive applications?
Yes, the P4SMA400A-M3/61 is AEC-Q101 qualified (Revision B per ordering table on page 3), making it suitable for automotive power electronics including on-board chargers, DC-DC converters, and battery management systems. Its halogen-free (M3) construction, 150 °C junction rating, and validated surge performance under temperature cycling meet stringent automotive reliability requirements. The P4SMA400A-M3/61 is explicitly listed in Vishay's AEC-Q101 qualified product matrix for high-voltage TVS applications.
What does the "M3" suffix indicate in P4SMA400A-M3/61?
The "M3" suffix denotes halogen-free, RoHS-compliant construction with matte tin-plated leads that meet JESD 201 Class 2 whisker resistance. It also signifies compliance with UL 94 V-0 flammability rating and MSL Level 1 moisture sensitivity. Unlike E3-suffix variants, M3 parts eliminate brominated flame retardants while maintaining identical electrical and thermal specifications - critical for automotive and green-industrial certifications. The P4SMA400A-M3/61 carries this designation per Vishay's official ordering information table.
How does the thermal performance of P4SMA400A-M3/61 affect PCB layout?
The P4SMA400A-M3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per Figure 2. To maintain TJ ≤ 150 °C at full 3.3 W steady-state dissipation, designers must allocate ≥25 mm² of 2-oz copper per terminal, avoid thermal isolation, and consider ambient derating above 25 °C. The P4SMA400A-M3/61 datasheet specifies this pad layout as minimum for rated power handling.
Can P4SMA400A-M3/61 be used in bidirectional configurations?
No, the P4SMA400A-M3/61 is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. Bidirectional variants use "CA" suffixes (e.g., P4SMA400CA). Using the P4SMA400A-M3/61 in reverse-biased AC applications would result in forward conduction and failure. For bidirectional protection at ~400 V, designers must select P4SMA400CA-M3/61 or equivalent - the P4SMA400A-M3/61 is electrically and mechanically optimized only for DC or single-polarity surge suppression.
P4SMA400A-M3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA, TransZorb®
- Packaging:
- Tape & Reel (TR)
- 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):
- 550mA
- Power - Peak Pulse:
- 300W
- 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-214AC (SMA)
P4SMA400A-M3/61 FAQ
1.How can I place an order for P4SMA400A-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA400A-M3/61 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 P4SMA400A-M3/61 reliable?
The price and inventory of P4SMA400A-M3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA400A-M3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA400A-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA400A-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA400A-M3/61?
P4SMA400A-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA400A-M3/61 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 P4SMA400A-M3/61?
For technical support, including P4SMA400A-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA400A-M3/61 requirements.
6.How does Aetrix verify that P4SMA400A-M3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA400A-M3/61 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 P4SMA400A-M3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA400A-M3/61?
All P4SMA400A-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA400A-M3/61, 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 P4SMA400A-M3/61 part is unused and in its original packaging.
Return procedure for P4SMA400A-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA400A-M3/61 Tags
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