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Vishay General Semiconductor - Diodes Division P4SMA400A-M3/5A
- Part No.:
- P4SMA400A-M3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA400A-M3/5A.pdf
- Description:
- TVS DIODE 342VWM 548VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA400A-M3/5A from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal paths. 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, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the P4SMA400A-M3/5A datasheet, P4SMA400A-M3/5A pinout, P4SMA400A-M3/5A application, or P4SMA400A-M3/5A equivalent, key selection criteria include clamping performance under 400 W surges, unidirectional polarity with cathode band marking, SMA (DO-214AC) package compatibility with automated SMT placement, and halogen-free RoHS compliance per M3 suffix.
Technical Context
The P4SMA400A-M3/5A operates as a silicon avalanche diode that enters controlled breakdown when reverse voltage exceeds VBR (380–420 V), limiting transient energy by clamping to ≤548 V at IPPM = 0.55 A. Its glass-passivated junction ensures stable leakage (<1 µA at VWM) and fast response time (<1.0 ns).
Thermal design relies on RθJA = 120 °C/W and RθJL = 30 °C/W, requiring minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for rated 400 W pulse handling. It is rated for TJ = –65 to +150 °C and qualified to AEC-Q101 (revision B) for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 400 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC bias margin. |
| VBR (min/max) | 380 V / 420 V at 1.0 mA - Ensures predictable avalanche onset across production lot; tight 10.5% tolerance. |
| VC @ IPPM | 548 V at 0.55 A - Clamped voltage during 10/1000 µs surge; determines protected circuit's maximum stress level. |
| PPPM | 400 W - Peak pulse power handling capability; validated with 0.01% duty cycle derating above 91 V. |
| IFSM | 40 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports inrush current immunity. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in high-ambient industrial environments. |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.28 mm length, 4.50 mm width, and 2.29 mm height; compatible with JEDEC MS-013. |
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), cathode indicated by black band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to system ground or low-side reference in unidirectional TVS configuration. |
| Cathode | Reverse-biased terminal / Surge clamping node | Connected to protected line (e.g., 400 V DC rail); band-marked end carries full clamping voltage during transients. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on high-voltage DC rails. |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage current over temperature and lifetime cycling. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets IPC-1752A material declaration requirements and environmental compliance for global OEM programs. |
| AEC-Q101 qualified (revision B) | Validated for automotive powertrain and body electronics applications requiring zero-failure reliability. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., inductive switch-off), improving system immunity. |
Applications
| Industrial HV DC Power Supply Protection | Automotive On-Board Charger (OBC) Input Stage |
|---|---|
|
Use Scenario: Protects 400 V DC bus in solar inverters and EV charging stations from lightning-induced surges and load dump events. IC Role / Device Role / Timing Role: Unidirectional TVS placed between HV+ and chassis ground to clamp transients before they reach DC-DC controllers or gate drivers. Use Value: Withstands 400 W pulses and clamps to ≤548 V, preserving downstream SiC MOSFETs rated for 650 V blocking voltage. |
Use Scenario: Shields OBC AC/DC front-end rectifiers and PFC stages from ISO 7637-2 pulse 5a/b transients during vehicle battery disconnection. IC Role / Device Role / Timing Role: Mounted across bulk capacitor input to absorb repetitive 100–400 W surges without thermal runaway. Use Value: AEC-Q101 qualification and 150 °C TJ rating ensure reliability in under-hood thermal environments up to 125 °C ambient. |
| Telecom Remote Radio Unit (RRU) Power Interface | Industrial Motor Drive DC Link Monitoring Circuit |
|
Use Scenario: Guards 48–57 V auxiliary power inputs in outdoor 5G RRUs exposed to induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: Used in conjunction with lower-voltage TVS arrays to provide staged protection; P4SMA400A-M3/5A handles primary high-energy clamping. Use Value: Low leakage (<1 µA at 400 V) prevents standby power loss in always-on telecom systems. |
Use Scenario: Protects isolated voltage dividers and ADC front-ends monitoring 400 V DC link in servo drives and VFDs. IC Role / Device Role / Timing Role: Placed across sensing resistor network to prevent transient-induced latch-up or damage to precision op-amps. Use Value: Tight VBR tolerance (380–420 V) ensures consistent clamping threshold across batches, critical for calibrated measurement accuracy. |
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-E3/5A | Same VWM/VBR/VC, but 400 W rating uses 1.5 kW test condition; higher RθJA = 140 °C/W; E3 suffix (non-halogen-free). | Less suitable for automotive or halogen-free BOMs; requires larger pad area for thermal management. | Select when halogen content is unrestricted and AEC-Q101 is not required. |
| 1.5SMC400AHE3_A | Higher 1500 W rating, DO-214AB package (larger footprint), same VWM/VBR; AEC-Q101 qualified but lead-free only (no halogen-free option). | Used where higher single-pulse energy absorption is needed; incompatible with SMA land patterns. | Choose for legacy designs using SMC pads or where >400 W single-event margin is mandatory. |
Compared with SMAJ400A-E3/5A and 1.5SMC400AHE3_A, the P4SMA400A-M3/5A uniquely combines halogen-free construction, AEC-Q101 revision B qualification, and SMA footprint - enabling drop-in replacement in space-constrained automotive and industrial SMT lines without layout change or material compliance requalification.
Availability
P4SMA400A-M3/5A is available at Aetrix Electronics and suitable for industrial power supplies, automotive on-board chargers, telecom remote radio units, and motor drive DC link monitoring circuits requiring stable component supply, halogen-free compliance, and AEC-Q101 reliability assurance.
Supply support for P4SMA400A-M3/5A 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 high-reliability, high-power, and automotive-qualified solutions.
The P4SMA series targets cost-sensitive yet robust transient protection in surface-mount power conversion and interface circuits, balancing high pulse power, tight parametric control, and standardized packaging for automated manufacturing.
FAQ
What is the clamping voltage of P4SMA400A-M3/5A under standard surge conditions?
The P4SMA400A-M3/5A has a maximum clamping voltage (VC) of 548 V when subjected to its rated peak pulse current of 0.55 A with a 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet 88367 and defines the upper voltage limit imposed on protected circuitry during transient events. The P4SMA400A-M3/5A maintains this clamping performance across its specified operating temperature range.
Is P4SMA400A-M3/5A suitable for automotive applications?
Yes, the P4SMA400A-M3/5A is AEC-Q101 qualified (revision B), making it suitable for automotive applications including on-board chargers, battery management systems, and ADAS power domains. Its halogen-free (M3) construction, 150 °C maximum junction temperature, and validation per JESD22-A108 thermal cycling confirm suitability for under-hood and powertrain environments. The P4SMA400A-M3/5A meets these requirements without derating at 125 °C ambient.
How does the M3 suffix affect P4SMA400A-M3/5A compliance and processing?
The M3 suffix on P4SMA400A-M3/5A indicates halogen-free, RoHS-compliant construction meeting IPC-1752A material declarations, with matte tin-plated leads qualified per J-STD-002 and JESD22-B102 whisker testing (Class 2). It supports lead-free reflow profiles up to 260 °C peak (MSL Level 1) and eliminates brominated flame retardants - critical for export compliance and high-reliability industrial programs. The P4SMA400A-M3/5A retains identical electrical specs versus E3 variants.
What is the thermal resistance of P4SMA400A-M3/5A, and how does it impact PCB layout?
The P4SMA400A-M3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead resistance (RθJL) of 30 °C/W. To achieve rated 400 W pulse power, Vishay specifies mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. Reducing pad size increases thermal impedance, derating pulse capability - the P4SMA400A-M3/5A must be laid out per Figure 5 in datasheet 88367 for full specification compliance.
Can P4SMA400A-M3/5A be used in bidirectional configurations?
No, the P4SMA400A-M3/5A is a unidirectional TVS diode, identifiable by its cathode band marking. Bidirectional operation requires CA-suffixed variants (e.g., P4SMA400CA). Using the P4SMA400A-M3/5A in reverse-biased AC applications would result in forward conduction and failure. For symmetrical surge protection, select the P4SMA400CA-M3/5A variant, which provides matched clamping in both directions.
P4SMA400A-M3/5A 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-M3/5A FAQ
1.How can I place an order for P4SMA400A-M3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA400A-M3/5A 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-M3/5A reliable?
The price and inventory of P4SMA400A-M3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA400A-M3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA400A-M3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA400A-M3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA400A-M3/5A?
P4SMA400A-M3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA400A-M3/5A 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-M3/5A?
For technical support, including P4SMA400A-M3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA400A-M3/5A requirements.
6.How does Aetrix verify that P4SMA400A-M3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA400A-M3/5A 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-M3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA400A-M3/5A?
All P4SMA400A-M3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA400A-M3/5A, 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-M3/5A part is unused and in its original packaging.
Return procedure for P4SMA400A-M3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA400A-M3/5A Tags
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