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Vishay General Semiconductor - Diodes Division P4SMA300A-M3/61
- Part No.:
- P4SMA300A-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA300A-M3/61.pdf
- Description:
- TVS DIODE 256VWM 414VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,335
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Product details
Overview
P4SMA300A-M3/61 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, rated for 300 V standoff voltage (VWM), 315 V maximum breakdown voltage (VBR), and 400 W peak pulse power (10/1000 μs). It clamps transients to 414 V at 0.73 A peak pulse current and is halogen-free, RoHS-compliant, and qualified per JESD201 Class 2 whisker test - used for protecting power rails and signal lines in industrial power supplies.
For engineers reviewing the P4SMA300A-M3/61 datasheet, P4SMA300A-M3/61 pinout, P4SMA300A-M3/61 application, or P4SMA300A-M3/61 equivalent, key selection criteria include unidirectional clamping behavior, 300 V working voltage margin, thermal resistance (RθJA = 120 °C/W), and compatibility with automated SMT placement on standard 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped overvoltage protection device, leveraging an avalanche breakdown mechanism to divert surge energy away from sensitive downstream circuitry. Its unidirectional polarity features a cathode band marking and exhibits low incremental surge resistance for rapid response to transients induced by inductive switching or ESD events.
Designed for surface-mount use on PCBs with minimal thermal mass, it delivers 400 W peak pulse power only when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal and derates linearly above 25 °C ambient temperature per Fig. 2. Junction temperature is rated up to +150 °C, with storage range from –65 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 300 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC/AC rail protection threshold. |
| VBR (Breakdown Voltage) | 285–315 V at 1.0 mA - Voltage at which avalanche conduction begins; ensures predictable turn-on within ±5 % tolerance. |
| VC (Clamping Voltage) | 414 V at IPPM = 0.73 A (10/1000 μs) - Peak voltage seen by protected circuit during surge; determines residual stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 400 W - Surge energy-handling capacity under standardized 10/1000 μs waveform; confirms suitability for IEC 61000-4-5 Level 3/4 surges. |
| RθJA | 120 °C/W - Thermal resistance junction-to-ambient; requires adequate PCB copper area to maintain TJ ≤ 150 °C under sustained 3.3 W dissipation. |
| Package | SMA (DO-214AC) - Low-profile SMT package with matte tin-plated leads; compatible with J-STD-002 solderability and MSL Level 1 reflow. |
| Compliance | Halogen-free, RoHS-compliant, JESD201 Class 2 whisker tested - meets environmental and reliability requirements for commercial industrial designs. |
Pinout & Package
SMA (DO-214AC) package: surface-mount, molded plastic case with cathode band marking on unidirectional variants; terminals are matte tin-plated leads suitable for reflow soldering per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to ground or low-impedance reference in unidirectional configuration; completes clamping loop during positive transients. |
| Cathode | Reverse-biased terminal / protected line connection | Connected to the line being protected (e.g., 300 V DC rail); avalanche conduction occurs when voltage exceeds VBR relative to anode. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables robust protection against high-energy transients such as lightning-induced surges or inductive kickback in industrial power systems. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving clamping precision for sensitive MOSFET gate drivers. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; simplifies SMT manufacturing flow for high-volume production. |
| Halogen-free, RoHS-compliant construction | Meets global environmental compliance mandates (e.g., EU RoHS Directive 2011/65/EU) without compromising surge performance or thermal stability. |
| 150 °C maximum junction temperature | Supports operation in high-ambient environments (e.g., enclosed power converters, motor drives) without derating below 3.3 W continuous dissipation. |
Applications
| Industrial DC Power Rail Protection | Telecom Line Interface Protection |
|---|---|
|
Use Scenario: Protecting 300 V DC bus in programmable logic controller (PLC) power modules from switching transients caused by relay coil de-energization. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed across input rail to clamp voltage spikes before they reach DC-DC converter ICs and microcontrollers. Use Value: Limits transient voltage to 414 V, preventing latch-up or gate oxide damage in 3.3 V/5 V logic and 600 V-rated MOSFETs downstream. |
Use Scenario: Safeguarding RS-485 transceiver inputs in outdoor base station equipment exposed to induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp on differential signal pair, coordinated with common-mode chokes and secondary TVS arrays. Use Value: Responds within <1 ns to suppress 1 kV/μs transients, maintaining signal integrity while meeting IEC 61000-4-5 2nd edition surge immunity requirements. |
| Renewable Energy Inverter DC Link | Motor Drive Control Board |
|
Use Scenario: Clamping voltage overshoot on photovoltaic string combiner box output lines during rapid disconnection events or arc-fault interruption. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between PV+ and ground, absorbing stored inductive energy from long cable runs. Use Value: Withstands repetitive 400 W pulses at 0.01 % duty cycle, enabling reliable protection without thermal runaway in high-solar-irradiance environments. |
Use Scenario: Protecting isolated gate driver supply rails in 3-phase inverter control boards from cross-talk and shoot-through-induced transients. IC Role / Device Role / Timing Role: Localized clamping element adjacent to gate driver ICs, reducing layout loop inductance and minimizing voltage ringing. Use Value: Low RθJL (30 °C/W) enables efficient heat transfer to PCB copper, sustaining 3.3 W continuous dissipation during frequent PWM switching cycles. |
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 VWM (300 V), identical SMA package, but rated for 400 W at 25 °C only on larger 0.4" × 0.4" pads; RθJA = 100 °C/W vs. 120 °C/W. | Preferred where board space allows larger thermal pads and higher continuous power handling is required. | Select SMAJ300A if thermal management via extended copper pour is feasible and tighter clamping tolerance (±3.5 % VBR) is needed. |
| 1.5SMC300A | Higher PPPM (1500 W), DO-214AB (SMC) package (larger footprint), VBR = 285–315 V, VC = 488 V at 3.1 A - less precise clamping. | Better suited for primary-level AC/DC front-end protection where physical size permits and higher surge currents dominate. | Choose 1.5SMC300A only when system-level surge testing demands >1 kW capability and board layout accommodates SMC's 7.1 mm × 6.2 mm footprint. |
Compared with SMAJ300A and 1.5SMC300A, P4SMA300A-M3/61 offers optimal balance of compact SMA footprint, halogen-free compliance, and verified 400 W surge rating on standard 5.0 mm × 5.0 mm pads - making it ideal for space-constrained industrial DC systems requiring repeatable, RoHS-aligned protection.
Availability
P4SMA300A-M3/61 is available at Aetrix Electronics and suitable for industrial power supplies, telecom infrastructure interfaces, renewable energy inverters, and motor drive control boards requiring stable component supply with full traceability and lifecycle continuity.
Supply support for P4SMA300A-M3/61 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series is part of Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-reliability transient suppression in commercial and industrial environments where consistent clamping performance and SMT manufacturability are critical.
FAQ
What is the maximum clamping voltage of the P4SMA300A-M3/61 under a 10/1000 μs surge?
The P4SMA300A-M3/61 clamps to a maximum of 414 V when subjected to its rated peak pulse current of 0.73 A under the standardized 10/1000 μs waveform. This value is measured at the device terminals with specified mounting conditions (0.2" × 0.2" copper pads) and defines the upper voltage limit imposed on protected circuitry during surge events. The P4SMA300A-M3/61 maintains this clamping performance across its operational temperature range.
Is the P4SMA300A-M3/61 suitable for automotive applications?
The P4SMA300A-M3/61 is not AEC-Q101 qualified; only variants with HE3 or HM3 suffixes (e.g., P4SMA300AHM3_B) carry that qualification. The P4SMA300A-M3/61 is rated for commercial-grade operation (–65 °C to +150 °C) and meets JESD201 Class 2 whisker testing, but lacks the extended reliability validation required for automotive ECUs or ADAS subsystems. For automotive use, specify P4SMA300AHM3_B/H instead of P4SMA300A-M3/61.
How does the P4SMA300A-M3/61 differ from bidirectional TVS diodes like P4SMA300CA?
The P4SMA300A-M3/61 is unidirectional and functions only in reverse-bias mode - it conducts during negative transients relative to its cathode, with forward conduction limited to ~3.5 V at 25 A. In contrast, P4SMA300CA is bidirectional and symmetrical, suppressing transients of either polarity. The P4SMA300A-M3/61 must be oriented correctly on PCB (cathode toward protected line), whereas P4SMA300CA has no polarity marking and fits AC-coupled or differential signal paths.
What is the thermal resistance of the P4SMA300A-M3/61, and how does it affect PCB layout?
The P4SMA300A-M3/61 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 avoid exceeding the 150 °C maximum junction temperature under 3.3 W continuous dissipation, PCB layout must provide at least this minimum pad area - reducing copper area increases RθJA and risks thermal runaway. The P4SMA300A-M3/61 does not require external heatsinking under nominal conditions.
Can the P4SMA300A-M3/61 be used in parallel to increase surge current handling?
No - the P4SMA300A-M3/61 should not be paralleled due to parameter spread in VBR (285–315 V) and dynamic impedance, which causes uneven current sharing and potential thermal failure of the lower-VBR unit. For higher surge ratings, select a single higher-power device (e.g., 1.5SMC300A) or implement staged protection with upstream MOVs and downstream low-capacitance TVS arrays. The P4SMA300A-M3/61 is designed for discrete point-of-load protection.
P4SMA300A-M3/61 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-M3/61 FAQ
1.How can I place an order for P4SMA300A-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA300A-M3/61 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-M3/61 reliable?
The price and inventory of P4SMA300A-M3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA300A-M3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA300A-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA300A-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA300A-M3/61?
P4SMA300A-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA300A-M3/61 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-M3/61?
For technical support, including P4SMA300A-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA300A-M3/61 requirements.
6.How does Aetrix verify that P4SMA300A-M3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA300A-M3/61 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-M3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA300A-M3/61?
All P4SMA300A-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA300A-M3/61, 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-M3/61 part is unused and in its original packaging.
Return procedure for P4SMA300A-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA300A-M3/61 Tags
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