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Vishay General Semiconductor - Diodes Division P4SMA350A-E3/5A
- Part No.:
- P4SMA350A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA350A-E3/5A.pdf
- Description:
- TVS DIODE 300VWM 482VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,484
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Product details
Overview
P4SMA350A-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 350 V standoff voltage (VWM), 368 V maximum breakdown voltage (VBR), and 400 W peak pulse power (10/1000 µs). It clamps transients to 482 V at 0.62 A peak pulse current and is used to protect high-voltage DC power rails and industrial sensor interfaces against ESD and inductive switching surges.
For engineers reviewing the P4SMA350A-E3/5A datasheet, P4SMA350A-E3/5A pinout, P4SMA350A-E3/5A application, or P4SMA350A-E3/5A equivalent, key selection criteria include its 350 V working voltage, 482 V clamping level at rated IPPM, unidirectional polarity with cathode band marking, RoHS-compliant matte tin plating, and MSL Level 1 reflow compatibility up to 260 °C.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (>1 µA leakage at 300 V), but triggers avalanche conduction when reverse voltage exceeds 333–368 V (VBR at 1 mA), limiting transient energy by diverting surge current to ground. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance.
Designed for automated SMT assembly on standard PCB pads (0.2" × 0.2"), the device sustains 400 W non-repetitive pulses per 10/1000 µs waveform with thermal resistance RθJA = 120 °C/W and maximum junction temperature of +150 °C. It meets AEC-Q101 qualification (suffix B revision) and UL 497B recognition for telecom and industrial surge protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 300 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA; defines safe DC rail protection threshold. |
| VBR (min/max) | 333 V / 368 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above system nominal voltage. |
| VC @ IPPM | 482 V at 0.62 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 400 W - Peak pulse power handling capability; supports robust protection against lightning-induced or inductive-switching transients. |
| IFSM | 40 A - Single half-sine surge rating (8.3 ms); validates survivability against high-energy AC-coupled faults. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in high-ambient industrial environments with appropriate board thermal design. |
| Package | SMA (DO-214AC) - Standardized SMT outline (5.28 mm × 4.50 mm × 2.29 mm); compatible with JEDEC J-STD-020 MSL Level 1 reflow profiles. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional configuration with cathode band marking. Dimensions: 5.28 mm × 4.50 mm × 2.29 mm (L × W × H); matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse surge return path | Connected to protected circuit's low-side or ground reference; completes shunt path during transient event. |
| Cathode | Reverse-biased terminal / clamping node | Connected to high-voltage rail (e.g., 350 V DC bus); avalanche conduction initiates here when VRM exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables protection of high-voltage industrial power supplies without derating below 300 V working voltage. |
| Glass-passivated junction | Ensures stable, repeatable avalanche characteristics over temperature and lifetime; reduces parameter drift in harsh environments. |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow assembly without popcorn cracking or parametric shift. |
| AEC-Q101 qualified (revision B) | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance-suitable for EV charging infrastructure. |
| UL 497B recognized (QVGQ2) | Meets safety requirements for telecom and data line protectors; simplifies end-equipment certification. |
Applications
| Industrial HV DC Power Rails | Telecom Line Interface Protection |
|---|---|
|
Use Scenario: Protection of 300–350 V DC distribution buses in factory automation PLCs and motor drives against inductive kickback and lightning-induced surges. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between HV rail and chassis ground; responds within <1 ns to clamp overvoltage events. Use Value: Limits rail voltage excursion to ≤482 V during 400 W transients, preventing damage to downstream DC-DC controllers and gate drivers. |
Use Scenario: Surge protection on primary-side power feed lines of outdoor telecom base stations and remote radio units. IC Role / Device Role / Timing Role: First-line defense against longitudinal surges (IEC 61000-4-5 Level 4) entering via AC/DC front-end transformers. Use Value: Withstands 0.62 A peak pulse current while maintaining <1 µA leakage at 300 V, ensuring minimal standby power loss and long-term reliability. |
| EV Charging Station DC Link | High-Voltage Sensor Signal Conditioning |
|
Use Scenario: Overvoltage suppression on DC link capacitors in 400 V+ EV fast-charging modules exposed to grid transients and regenerative braking spikes. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-ground, cathode-to-rail; activated only during positive-going surges on the high-side rail. Use Value: 368 V VBR margin above 350 V nominal ensures no false triggering during normal operation while delivering 482 V clamping under fault. |
Use Scenario: Protection of isolated analog front-ends measuring battery string voltages in energy storage systems (ESS). IC Role / Device Role / Timing Role: Rail-to-rail clamping element on differential HV sense inputs, paired with precision resistive dividers. Use Value: Low 0.11 %/°C VBR tempco maintains consistent trigger point across -40 °C to +125 °C ambient, critical for 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 |
|---|---|---|---|
| SMBJ350A | Same VWM/VBR ratings but SMB package (DO-214AA); 600 W PPPM, higher IPPM (0.83 A), larger footprint (6.2 mm × 3.5 mm). | Better suited for higher-energy surges where board space allows larger package; not drop-in due to different pad layout and thermal mass. | Select SMBJ350A when surge energy exceeds 400 W or when lower clamping voltage (440 V) is required at higher current. |
| SMCJ350A | Same VWM/VBR but SMC package (DO-214AB); 1500 W PPPM, IPPM = 2.2 A, significantly larger (7.1 mm × 6.2 mm). | Targeted at heavy-duty industrial equipment requiring IEC 61000-4-5 Level 4 compliance with minimal derating. | Choose SMCJ350A for mission-critical 350 V rail protection where PCB area permits and surge immunity must exceed 1 kW. |
Compared with SMBJ350A and SMCJ350A, the P4SMA350A-E3/5A offers optimal balance of compact SMA footprint, AEC-Q101 qualification, and verified 400 W surge handling-ideal for space-constrained, high-reliability 350 V DC applications where full 600 W or 1500 W rating is unnecessary.
Availability
P4SMA350A-E3/5A is available at Aetrix Electronics and suitable for industrial power conversion, telecom infrastructure, EV charging systems, and high-voltage sensor interfaces requiring stable component supply and long-term lifecycle support.
Supply support for P4SMA350A-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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for industrial, automotive, and computing markets.
The P4SMA Series is engineered for surface-mount transient suppression in high-voltage DC systems, emphasizing low-profile packaging, AEC-Q101 qualification, and consistent clamping performance across wide temperature ranges.
FAQ
What is the maximum clamping voltage of the P4SMA350A-E3/5A under rated surge conditions?
The P4SMA350A-E3/5A clamps to a maximum of 482 V when subjected to its rated 10/1000 µs peak pulse current of 0.62 A. This value is measured per standard test conditions (TA = 25 °C, mounted on 0.2" × 0.2" copper pads) and defines the upper voltage limit imposed on protected circuitry during transient events. The P4SMA350A-E3/5A maintains this clamping performance consistently across its qualified operating temperature range.
Is the P4SMA350A-E3/5A suitable for automotive applications?
Yes, the P4SMA350A-E3/5A is AEC-Q101 qualified under revision B, confirming its suitability for automotive-grade applications including EV charging infrastructure and battery management systems. Its construction features glass-passivated junctions, matte tin-plated leads compliant with JESD 22-B102, and MSL Level 1 reflow capability-key requirements for under-hood and powertrain environments. The P4SMA350A-E3/5A meets these standards without requiring derating in typical automotive thermal profiles.
What does the "-E3/5A" suffix indicate in P4SMA350A-E3/5A?
The "-E3" denotes RoHS-compliant, commercial-grade construction with matte tin plating, while "/5A" specifies packaging in 13-inch diameter plastic tape and reel containing 7500 units. This format aligns with Vishay's standardized ordering nomenclature for surface-mount devices and ensures compatibility with high-speed pick-and-place equipment. The P4SMA350A-E3/5A is distinct from HE3/HM3 variants, which carry AEC-Q101 qualification and halogen-free material options.
How does the P4SMA350A-E3/5A compare to bidirectional TVS diodes like P4SMA350CA?
The P4SMA350A-E3/5A is unidirectional and features a cathode band marking, intended for DC rail protection where polarity is fixed. In contrast, P4SMA350CA is bidirectional with symmetric clamping in both directions and no polarity marking-used in AC-coupled or floating signal lines. The P4SMA350A-E3/5A offers tighter VBR tolerance (333–368 V) and lower leakage at VWM than its bidirectional counterpart, making it preferable for high-impedance DC sensing nodes.
What is the thermal resistance and maximum junction temperature of the P4SMA350A-E3/5A?
The P4SMA350A-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads, and a maximum junction temperature (TJ) of +150 °C. These values define its safe operating area under continuous power dissipation (3.3 W) and transient overload conditions. Derating curves in the datasheet show that the P4SMA350A-E3/5A retains full 400 W pulse capability only up to TA = 25 °C; above that, pulse power must be reduced per Figure 2.
P4SMA350A-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):
- 300V
- Voltage - Breakdown (Min):
- 333V
- Voltage - Clamping (Max) @ Ipp:
- 482V
- Current - Peak Pulse (10/1000µs):
- 620mA
- 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)
P4SMA350A-E3/5A FAQ
1.How can I place an order for P4SMA350A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA350A-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 P4SMA350A-E3/5A reliable?
The price and inventory of P4SMA350A-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 P4SMA350A-E3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA350A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA350A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA350A-E3/5A?
P4SMA350A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA350A-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 P4SMA350A-E3/5A?
For technical support, including P4SMA350A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA350A-E3/5A requirements.
6.How does Aetrix verify that P4SMA350A-E3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA350A-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 P4SMA350A-E3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA350A-E3/5A?
All P4SMA350A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA350A-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 P4SMA350A-E3/5A part is unused and in its original packaging.
Return procedure for P4SMA350A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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