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Vishay General Semiconductor - Diodes Division P4SMA300A-M3/5A
- Part No.:
- P4SMA300A-M3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA300A-M3/5A.pdf
- Description:
- TVS DIODE 256VWM 414VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,180
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Product details
Overview
P4SMA300A-M3/5A from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping high-energy transients on power and signal lines. It features a 300 V standoff voltage (VWM), 315 V maximum breakdown voltage (VBR), 414 V clamping voltage at 0.73 A peak pulse current (IPPM), and 400 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial power supplies and automotive sensor protection.
For engineers reviewing the P4SMA300A-M3/5A datasheet, P4SMA300A-M3/5A pinout, P4SMA300A-M3/5A application, or P4SMA300A-M3/5A equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, and direct alternatives qualified for high-voltage transient suppression in commercial and AEC-Q101–compatible designs.
Technical Context
The P4SMA300A-M3/5A operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 300 V stand-off threshold to divert surge energy away from downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at VWM), while MSL Level 1 moisture sensitivity supports standard reflow assembly without preconditioning.
Thermal resistance is rated at 120 °C/W (junction-to-ambient) on minimum recommended copper pads, and it sustains repetitive 400 W pulses at 0.01% duty cycle. The device meets UL 497B recognition and is halogen-free, RoHS-compliant per Vishay's M3 suffix designation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 300 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working limit. |
| VBR (Breakdown Voltage) | 285–315 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 414 V at IPPM = 0.73 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; critical for IC survival margin. |
| PPPM (Peak Pulse Power) | 400 W - Sustained transient energy absorption capability; derates above 25 °C per Fig. 2 in datasheet. |
| ID (Reverse Leakage) | <1 µA at 300 V - Minimal standby power loss and signal integrity impact in high-impedance circuits. |
| TJ max | 150 °C - Maximum junction temperature; sets upper limit for thermal design and ambient operating envelope. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with cathode band marking; compatible with automated placement and J-STD-002 soldering. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1, 260 °C peak reflow profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; enables unidirectional clamping from cathode to anode. |
| Cathode | Avalanche clamping terminal | Marked with band; connected to higher-potential side (e.g., VIN or signal line); conducts surge current to ground path during overvoltage. |
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 systems without derating. |
| Glass-passivated junction | Ensures long-term stability of VBR and low parametric drift across temperature and lifetime stress. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for industrial and automotive supply chains without sacrificing performance. |
| AEC-Q101 qualified (P4SMA300A-M3/5A variant B) | Validated for automotive-grade reliability including HTOL, TC, and ESD testing - suitable for engine control and ADAS sensor interfaces. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., inductive switch-off), improving clamping fidelity. |
Applications
| Industrial Power Supply Protection | Automotive Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 300 V DC bus inputs in programmable logic controller (PLC) power modules from load dump 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 upstream rectifiers and DC-DC controllers. Use Value: Withstands 400 W surges while limiting clamped voltage to 414 V - preserving 450 V-rated electrolytic capacitors and MOSFETs downstream. |
Use Scenario: Safeguarding CAN FD and LIN bus transceivers in vehicle body control modules exposed to ISO 7637-2 pulse 5a (load dump). IC Role / Device Role / Timing Role: Standoff-rated TVS on VCC line feeding transceiver ICs; activated only during >300 V excursions to avoid interference with normal 12 V operation. Use Value: Low 1 µA leakage prevents quiescent current increase; AEC-Q101 qualification ensures operation across -40 °C to +125 °C ambient. |
| Telecom AC/DC Front-End Protection | Renewable Energy Inverter DC Link Protection |
|
Use Scenario: Secondary-side surge suppression on 300 V DC output of telecom rectifiers subjected to induced surges from nearby AC mains switching. IC Role / Device Role / Timing Role: Fast-response unidirectional clamp on DC output rail, coordinated with upstream MOVs to handle multi-staged transient energy. Use Value: 10/1000 µs clamping response ensures sub-microsecond turn-on; 414 V VC maintains safety margin below 600 V isolation barrier ratings. |
Use Scenario: Overvoltage clamping on DC link of solar string inverters where PV array open-circuit voltage reaches 300–400 V under cold conditions. IC Role / Device Role / Timing Role: Parallel-connected TVS across DC bus capacitor to absorb switching transients from IGBT gate drive noise and grid fault recovery spikes. Use Value: 150 °C TJ max and 120 °C/W RθJA allow mounting on heatsinked PCB areas; halogen-free M3 construction complies with IEC 61215 fire safety standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ300A | Same VWM/VBR/VC specs but in larger SMB (DO-214AA) package; 600 W PPPM rating; higher thermal mass. | Better suited for higher-duty-cycle or repeated surge environments; requires larger PCB footprint. | Select SMBJ300A when board space permits and thermal cycling endurance is prioritized over miniaturization. |
| 1.5SMC300A | Same electrical specs but in SMC (DO-214AB) package; 1500 W PPPM; higher IPPM (1.2 A); higher RθJA (100 °C/W). | Designed for single-event high-energy threats (e.g., lightning); less optimal for repetitive industrial surges due to slower thermal recovery. | Choose 1.5SMC300A only for infrequent, high-amplitude threats where peak power dominates over thermal management. |
Compared with SMBJ300A and 1.5SMC300A, the P4SMA300A-M3/5A offers the smallest footprint (SMA), lowest cost-per-unit in high-volume tape-and-reel, and optimal balance of clamping precision and thermal response for commercial and automotive-grade 300 V system protection.
Availability
P4SMA300A-M3/5A is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor interfaces, telecom rectifier outputs, and renewable energy inverter DC links requiring stable component supply, halogen-free compliance, and AEC-Q101–ready variants.
Supply support for P4SMA300A-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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series was developed for compact, high-power transient suppression in space-constrained surface-mount applications - targeting industrial automation, automotive electronics, and telecom infrastructure where consistent clamping and long-term stability are critical.
FAQ
What is the clamping voltage of the P4SMA300A-M3/5A under a 10/1000 µs surge?
The P4SMA300A-M3/5A clamps to a maximum of 414 V when subjected to its rated peak pulse current of 0.73 A with a 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet 88367 and represents the worst-case voltage imposed on protected circuitry during standardized surge testing.
Is the P4SMA300A-M3/5A suitable for automotive applications?
Yes - the P4SMA300A-M3/5A is offered in an AEC-Q101–qualified variant (suffix B, e.g., P4SMA300AHM3_B/I), which undergoes stress testing for high-temperature operation, thermal cycling, and humidity exposure. The base P4SMA300A-M3/5A itself carries the M3 halogen-free, RoHS-compliant designation required by many Tier 1 automotive suppliers.
How does the P4SMA300A-M3/5A differ from bidirectional TVS diodes like P4SMA300CA?
The P4SMA300A-M3/5A is unidirectional and functions only in reverse bias, with polarity marked by a cathode band. In contrast, P4SMA300CA is bidirectional and symmetrical - suitable for AC line or differential signal protection. The P4SMA300A-M3/5A provides tighter leakage control (<1 µA) and is preferred for DC rail protection where forward conduction must be avoided.
What is the thermal resistance of the P4SMA300A-M3/5A, and how does it affect layout?
The P4SMA300A-M3/5A 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 terminal. To maintain safe junction temperatures under repetitive surges, PCB layout must provide adequate copper area and avoid thermal bottlenecks - especially critical above 25 °C ambient.
Does the P4SMA300A-M3/5A require derating at elevated ambient temperatures?
Yes - the P4SMA300A-M3/5A must be derated linearly above 25 °C ambient, per Figure 2 in Vishay document 88367. At 85 °C ambient, its peak pulse power drops to approximately 240 W (60% of 400 W), and at 125 °C, it falls to ~120 W. Designers must apply this derating when specifying surge immunity for high-temperature enclosures or under-hood automotive use.
P4SMA300A-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):
- 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-M3/5A FAQ
1.How can I place an order for P4SMA300A-M3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA300A-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 P4SMA300A-M3/5A reliable?
The price and inventory of P4SMA300A-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 P4SMA300A-M3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA300A-M3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA300A-M3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA300A-M3/5A?
P4SMA300A-M3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA300A-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 P4SMA300A-M3/5A?
For technical support, including P4SMA300A-M3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA300A-M3/5A requirements.
6.How does Aetrix verify that P4SMA300A-M3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA300A-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 P4SMA300A-M3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA300A-M3/5A?
All P4SMA300A-M3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA300A-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 P4SMA300A-M3/5A part is unused and in its original packaging.
Return procedure for P4SMA300A-M3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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