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Vishay General Semiconductor - Diodes Division P4SMA300A-E3/5A
- Part No.:
- P4SMA300A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA300A-E3/5A.pdf
- Description:
- TVS DIODE 256VWM 414VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,127
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Product details
Overview
P4SMA300A-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 300 V standoff voltage (VWM), 315 V minimum breakdown voltage (VBR), 414 V maximum clamping voltage (VC) at 0.73 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial power supplies and automotive sensor interfaces.
For engineers reviewing the P4SMA300A-E3/5A datasheet, P4SMA300A-E3/5A pinout, P4SMA300A-E3/5A application, or P4SMA300A-E3/5A equivalent, this device delivers verified clamping performance, AEC-Q101 qualification (via HE3/HM3 variants), RoHS-compliant SMA (DO-214AC) packaging, and low incremental surge resistance critical for IEC 61000-4-5 transient immunity compliance.
Technical Context
The P4SMA300A-E3/5A operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 315 V minimum breakdown threshold to clamp transients within 1 ns response time. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 µA at 256 V).
Thermally, it sustains 150 °C maximum junction temperature with 120 °C/W junction-to-ambient thermal resistance on standard 5.0 mm × 5.0 mm copper pads. Derating begins above 25 °C ambient, maintaining 300 W pulse power capability above 91 V per specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 300 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR (Breakdown Voltage) | 285–315 V at 1 mA test current - Confirmed avalanche initiation range for reliable triggering |
| VC (Clamping Voltage) | 414 V at 0.73 A IPPM - Peak voltage seen by protected circuit during 10/1000 µs transient |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy absorption capability under standardized surge waveform |
| IPPM (Peak Pulse Current) | 0.73 A - Maximum non-repetitive surge current handled at rated clamping voltage |
| RθJA | 120 °C/W - Thermal resistance defining derating curve for PCB layout design |
| TJ max. | 150 °C - Absolute maximum junction temperature limiting high-temperature operation |
Pinout & Package
Package: SMA (DO-214AC) - Surface-mount plastic package with matte tin-plated leads, UL 94 V-0 rated molding compound, MSL Level 1 (260 °C reflow peak), and cathode band marking for polarity identification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during forward surge (e.g., ESD event polarity reversal) |
| Cathode | Reverse-biased clamping terminal | Connected to higher-potential side; avalanches into conduction when reverse voltage exceeds VBR, shunting surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 Level 4 (4 kV) surge testing on 50 Ω source impedance |
| 1 ns typical response time | Prevents voltage overshoot beyond IC absolute maximum ratings during fast transients (e.g., relay bounce, EFT) |
| Glass-passivated junction | Ensures long-term stability of VBR and low leakage (<1 µA) across temperature and lifetime |
| AEC-Q101 qualified variants available | Supports automotive-grade deployment in engine control units and ADAS sensor modules without additional qualification effort |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during high-di/dt events, improving protection margin for downstream MOSFETs or MCUs |
Applications
| Industrial Power Supply Protection | Automotive Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 24 V DC input rails in PLC I/O modules against inductive switching spikes and lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp transients before they reach DC-DC converters and microcontrollers. Use Value: 414 V clamping voltage ensures downstream 600 V-rated MOSFETs and 3.3 V logic remain within safe operating area during 1 kV/500 A surge events. |
Use Scenario: Safeguarding LIN bus and analog sensor inputs (e.g., pressure, temperature) in vehicle body control modules. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across signal line and ground to suppress load dump and ISO 7637-2 pulses without distorting low-speed communication. Use Value: 300 V VWM allows compatibility with 24 V automotive systems while rejecting normal operating noise; 1 ns response prevents data corruption during EFT bursts. |
| Telecom Line Card Surge Protection | Renewable Energy Inverter DC Link Protection |
|
Use Scenario: Shielding Ethernet PHY power pins and auxiliary bias rails in outdoor telecom base station line cards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on 48 V intermediate bus, coordinated with secondary GDT or MOV stages for staged energy handling. Use Value: 400 W PPPM rating supports multi-strike endurance in high-lightning-risk regions; DO-214AC footprint enables automated placement alongside other protection devices. |
Use Scenario: Clamping voltage spikes on photovoltaic string inputs and battery-side DC links in residential solar inverters during grid fault recovery. IC Role / Device Role / Timing Role: Fast-acting unidirectional suppressor placed across DC link capacitor terminals to limit overvoltage stress during rapid current interruption. Use Value: 150 °C TJ max and 120 °C/W RθJA allow reliable operation in thermally constrained inverter enclosures without active cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ300A | Same 300 V VWM, but 400 W PPPM achieved at higher IPPM (0.8 A); slightly higher VC (430 V) | Marginally lower clamping ratio; less suitable where strict <420 V clamping is required | Select SMAJ300A only if board layout accommodates its larger thermal pad requirements and higher VC is acceptable |
| 1.5SMC300A | Higher 1500 W PPPM rating, but larger SMC (DO-214AB) package; 400 V VC at 3.75 A IPPM | Designed for higher-energy threats; incompatible with SMA footprints without redesign | Choose 1.5SMC300A when system-level surge testing exceeds IEC 61000-4-5 Level 4 and PCB space permits larger package |
Compared with SMAJ300A and 1.5SMC300A, the P4SMA300A-E3/5A offers optimal balance of compact DO-214AC footprint, precise 414 V clamping, and production-ready RoHS/E3 compliance - making it preferred for space-constrained industrial and automotive designs requiring validated 400 W surge handling.
Availability
P4SMA300A-E3/5A is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor interfaces, telecom line cards, and renewable energy inverters requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for P4SMA300A-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, precision, and automotive-grade qualification.
The P4SMA Series targets cost-sensitive, high-volume applications demanding robust transient suppression in compact surface-mount packages - optimized for automated manufacturing and compliance with AEC-Q101, UL 497B, and RoHS standards.
FAQ
What is the clamping voltage of P4SMA300A-E3/5A at its rated peak pulse current?
The P4SMA300A-E3/5A has a maximum clamping voltage (VC) of 414 V at its specified peak pulse current (IPPM) of 0.73 A under a 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88367 and defines the upper voltage limit imposed on protected circuits during standardized surge events. The P4SMA300A-E3/5A maintains this clamping performance across its qualified operating temperature range.
Is P4SMA300A-E3/5A suitable for automotive applications?
The P4SMA300A-E3/5A itself is RoHS-compliant and commercial-grade; however, Vishay offers AEC-Q101 qualified versions under ordering codes like P4SMA300AHM3_B/I. While P4SMA300A-E3/5A shares identical electrical characteristics, automotive deployment requires the HM3 or HE3 suffix variants. The P4SMA300A-E3/5A is appropriate for non-safety-critical industrial or telecom use where AEC-Q101 is not mandated.
What does the "E3/5A" suffix indicate in P4SMA300A-E3/5A?
The "E3" denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads; "5A" specifies packaging in 13-inch diameter plastic tape and reel containing 7500 units. This differs from "/61" (7-inch reel, 1800 units) and aligns with high-volume SMT assembly requirements. The P4SMA300A-E3/5A meets JESD201 Class 2 whisker resistance and J-STD-020 MSL Level 1 reflow specifications.
How does P4SMA300A-E3/5A compare to bidirectional TVS diodes?
The P4SMA300A-E3/5A is unidirectional and intended for DC circuits where polarity is fixed - it conducts only in reverse breakdown and blocks forward current up to 3.5 V. Bidirectional variants (e.g., P4SMA300CA) protect AC or dual-polarity lines but exhibit symmetrical clamping in both directions. For 24 V DC power rails or single-ended sensor outputs, the P4SMA300A-E3/5A provides tighter VWM/VBR ratios and avoids unnecessary forward conduction paths.
What is the thermal resistance and derating behavior of P4SMA300A-E3/5A?
The P4SMA300A-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per Figure 2 in the datasheet. Power derating begins linearly above 25 °C ambient, reducing peak pulse power to 300 W at 91 V and above. Continuous power dissipation is limited to 3.3 W at 50 °C ambient. The P4SMA300A-E3/5A must be placed on adequate copper area to maintain safe junction temperatures during repetitive surge events.
P4SMA300A-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):
- 256V
- Voltage - Breakdown (Min):
- 285V
- Voltage - Clamping (Max) @ Ipp:
- 414V
- Current - Peak Pulse (10/1000µs):
- 730mA
- 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)
P4SMA300A-E3/5A FAQ
1.How can I place an order for P4SMA300A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA300A-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 P4SMA300A-E3/5A reliable?
The price and inventory of P4SMA300A-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 P4SMA300A-E3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA300A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA300A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA300A-E3/5A?
P4SMA300A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA300A-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 P4SMA300A-E3/5A?
For technical support, including P4SMA300A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA300A-E3/5A requirements.
6.How does Aetrix verify that P4SMA300A-E3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA300A-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 P4SMA300A-E3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA300A-E3/5A?
All P4SMA300A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA300A-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 P4SMA300A-E3/5A part is unused and in its original packaging.
Return procedure for P4SMA300A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA300A-E3/5A Tags
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