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Vishay General Semiconductor - Diodes Division P4SMA400A-E3/5A
- Part No.:
- P4SMA400A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA400A-E3/5A.pdf
- Description:
- TVS DIODE 342VWM 548VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,077
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Product details
Overview
P4SMA400A-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 400 W peak pulse power (10/1000 µs), 342 V standoff voltage (VWM), and 548 V clamping voltage (VC) at 0.55 A peak pulse current. It protects power rails and signal lines in industrial motor drives against inductive switching transients.
For engineers reviewing the P4SMA400A-E3/5A datasheet, P4SMA400A-E3/5A pinout, P4SMA400A-E3/5A application, or P4SMA400A-E3/5A equivalent, this page delivers verified electrical parameters, thermal derating behavior, RoHS-compliant packaging details, and AEC-Q101 qualification status for high-reliability design-in.
Technical Context
The P4SMA400A-E3/5A operates as a unidirectional avalanche-clamping device with a breakdown voltage (VBR) of 380–420 V at 1.0 mA test current and exhibits a temperature coefficient of VBR of +0.110 %/°C. Its glass-passivated junction ensures stable reverse leakage (<1.0 µA at VWM) and fast response to ESD and surge events.
Thermal performance is defined by RθJA = 120 °C/W (junction-to-ambient, on minimum pad layout) and RθJL = 30 °C/W (junction-to-lead), supporting operation from –65 °C to +150 °C. The device meets MSL Level 1 per J-STD-020 and is RoHS-compliant with matte tin-plated leads solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 342 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (Breakdown Voltage) | 380–420 V at 1.0 mA - Confirmed avalanche initiation range under standardized DC test |
| VC (Clamping Voltage) | 548 V at IPPM = 0.55 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge |
| PPPM (Peak Pulse Power) | 400 W - Sustained transient energy absorption capability under standard 10/1000 µs waveform |
| IFSM (Surge Current) | 40 A - Single half-sine 8.3 ms forward surge rating for unidirectional operation only |
| TJ max. | +150 °C - Maximum junction temperature enabling use in high-ambient industrial environments |
| Package | SMA (DO-214AC) - Surface-mount footprint compatible with automated placement; 0.208" × 0.157" body size |
Pinout & Package
Package: SMA (DO-214AC), molded epoxy case meeting UL 94 V-0 flammability rating; cathode indicated by band on one end; matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during forward surge events (e.g., reverse polarity faults) |
| Cathode | Avalanche clamping terminal | Connected to higher-potential side; initiates controlled breakdown when reverse voltage exceeds VWM |
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 24–48 V DC power buses |
| Glass passivated junction | Ensures long-term stability of VBR and low parametric drift over temperature and lifetime |
| MSL Level 1, 260 °C reflow compatible | Supports single-pass lead-free reflow assembly without moisture-related popcorning or delamination |
| AEC-Q101 qualified (P4SMA400A-B variant) | Validated for automotive-grade reliability; P4SMA400A-E3/5A shares identical die and construction |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., relay coil flyback) |
Applications
| Industrial Motor Drive Protection | Telecom Power Supply Input |
|---|---|
Use Scenario: Suppresses inductive kickback from contactors and solenoids in PLC output modules operating at 300–400 V DC bus. IC Role / Device Role / Timing Role: Unidirectional TVS placed across DC bus input to clamp transients before they reach upstream DC-DC converters. Use Value: Limits transient voltage to ≤548 V, preventing damage to 600 V-rated MOSFETs and gate drivers while maintaining system uptime. |
Use Scenario: Protects primary-side rectifier and bulk capacitor inputs in telecom -48 V DC power systems exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS installed between rectified output and ground to absorb differential-mode surges up to 400 W. Use Value: Maintains <1 µA leakage at 342 V, minimizing standby power loss while delivering sub-100 ns response to 10/1000 µs threats. |
| Renewable Energy Inverter DC Link | Railway Signaling Interface |
Use Scenario: Shields DC link capacitors in solar string inverters against grid-switching transients and capacitor bank discharge spikes. IC Role / Device Role / Timing Role: High-VWM TVS mounted directly across 350–450 V DC link to limit overvoltage stress during fault clearing. Use Value: Withstands 150 °C junction temperature, enabling direct mounting near heat-generating IGBT modules without derating. |
Use Scenario: Safeguards 24 V DC signaling lines in railway trackside electronics subjected to traction return current coupling. IC Role / Device Role / Timing Role: Unidirectional suppressor installed on field-side interface to prevent false triggering of optocouplers and level shifters. Use Value: Delivers consistent 342 V standoff with ±5 % tolerance, ensuring reliable immunity to slow-rising 100 ms surges per EN 50121-3-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ400A | Same VWM (342 V), but SMB package (DO-214AA); 600 W PPPM; RθJA = 90 °C/W | Higher power handling, larger footprint; better suited for PCBs with limited copper area | Select when thermal margin is constrained and board space allows 0.260" × 0.175" footprint |
| 1.5SMC400A | Same VWM, but SMC package (DO-214AB); 1500 W PPPM; RθJA = 65 °C/W | Designed for high-energy surges (e.g., AC mains); requires larger pad layout and higher assembly cost | Choose for mission-critical infrastructure where multi-kW surge immunity is mandated |
Compared with SMBJ400A and 1.5SMC400A, the P4SMA400A-E3/5A offers optimal balance of compact SMA footprint, 400 W surge capability, and commercial-grade cost-ideal for space-constrained industrial DC systems where 300–400 V bus protection is required without over-engineering.
Availability
P4SMA400A-E3/5A is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, renewable energy inverters, and railway signaling systems requiring stable component supply and RoHS-compliant sourcing.
Supply support for P4SMA400A-E3/5A 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series was developed for surface-mount transient suppression in space-constrained, high-voltage DC applications-delivering consistent clamping performance across automotive, industrial, and telecom environments.
FAQ
What is the maximum clamping voltage of the P4SMA400A-E3/5A under a 10/1000 µs surge?
The P4SMA400A-E3/5A has a maximum clamping voltage (VC) of 548 V when subjected to its rated peak pulse current of 0.55 A under the standard 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88367 and defines the upper voltage limit imposed on protected circuitry during transient events. The P4SMA400A-E3/5A maintains this clamping performance across its full operating temperature range.
Is the P4SMA400A-E3/5A suitable for automotive applications?
The P4SMA400A-E3/5A itself is a commercial-grade part with RoHS compliance and MSL Level 1 rating, but it is not AEC-Q101 qualified. However, Vishay offers the functionally identical P4SMA400AHM3_B/I variant-same die, same electrical specs, same SMA package-with full AEC-Q101 qualification for automotive use. Engineers selecting P4SMA400A-E3/5A for automotive must verify system-level qualification requirements; the P4SMA400A-E3/5A remains appropriate for non-safety-critical industrial subsystems sharing similar voltage and surge profiles.
What is the standoff voltage (VWM) of the P4SMA400A-E3/5A, and how does it relate to system design?
The P4SMA400A-E3/5A has a standoff voltage (VWM) of 342 V, meaning it remains in high-impedance blocking mode up to this DC or RMS voltage. This value is 15 % below the minimum breakdown voltage (380 V), providing design margin against leakage rise and temperature drift. For a 400 V DC bus, the P4SMA400A-E3/5A ensures minimal leakage (<1 µA) during normal operation while reliably activating only during overvoltage faults-making it ideal for high-voltage industrial power rail protection.
Does the P4SMA400A-E3/5A have bidirectional capability?
No, the P4SMA400A-E3/5A is strictly a unidirectional TVS diode, as indicated by the "A" suffix and absence of "CA" in the part number. Its cathode band marks the terminal that conducts during reverse overvoltage events. Bidirectional variants (e.g., P4SMA400CA) are available for AC-line or differential-signal protection, but the P4SMA400A-E3/5A must be oriented correctly in-circuit with anode toward lower potential to function as intended.
What is the thermal resistance and maximum junction temperature of the P4SMA400A-E3/5A?
The P4SMA400A-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended copper pads (0.2" × 0.2"), and a junction-to-lead resistance (RθJL) of 30 °C/W. Its maximum rated junction temperature is +150 °C, allowing reliable operation in high-temperature enclosures such as motor control cabinets or outdoor telecom shelters. Derating curves in Figure 2 of document 88367 define safe power limits above 25 °C ambient.
P4SMA400A-E3/5A 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:
- 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):
- 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-E3/5A FAQ
1.How can I place an order for P4SMA400A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA400A-E3/5A 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-E3/5A reliable?
The price and inventory of P4SMA400A-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA400A-E3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA400A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA400A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA400A-E3/5A?
P4SMA400A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA400A-E3/5A 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-E3/5A?
For technical support, including P4SMA400A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA400A-E3/5A requirements.
6.How does Aetrix verify that P4SMA400A-E3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA400A-E3/5A 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-E3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA400A-E3/5A?
All P4SMA400A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA400A-E3/5A, 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-E3/5A part is unused and in its original packaging.
Return procedure for P4SMA400A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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