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Vishay General Semiconductor - Diodes Division P4SMA51A-M3/5A
- Part No.:
- P4SMA51A-M3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA51A-M3/5A.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,778
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Product details
Overview
P4SMA51A-M3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P4SMA series, designed for clamping voltage transients on power and signal lines. It features a 43.6 V standoff voltage (VWM), 48.5–53.6 V breakdown voltage (VBR) at 1 mA, 70.1 V maximum clamping voltage (VC) at 5.7 A peak pulse current, and 400 W peak pulse power rating with a 10/1000 µs waveform - suitable for protecting MOSFETs and sensor interfaces in industrial power supplies.
For engineers reviewing the P4SMA51A-M3/5A datasheet, P4SMA51A-M3/5A pinout, P4SMA51A-M3/5A application, or P4SMA51A-M3/5A equivalent, key selection considerations include its unidirectional polarity, SMA (DO-214AC) package thermal resistance (RθJA = 120 °C/W), AEC-Q101 qualification eligibility (M3 suffix), halogen-free RoHS compliance, and 150 °C max junction temperature.
Technical Context
This TVS diode operates as a clamping device that enters avalanche conduction when reverse voltage exceeds its breakdown threshold, diverting surge current away from protected circuitry. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at VWM), while the low incremental surge resistance enables effective transient suppression during fast-rising ESD or inductive-switching events.
The device is rated for 400 W peak pulse power (10/1000 µs) up to 91 V, derating to 300 W above that voltage, and supports repetitive surges at 0.01% duty cycle. Mounted on 0.2" × 0.2" copper pads, it achieves thermal performance consistent with RθJA = 120 °C/W and RθJL = 30 °C/W, enabling reliable operation in ambient temperatures from –65 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 43.6 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC/AC working margin. |
| VBR (Breakdown Voltage) | 48.5–53.6 V at 1 mA - Confirmed avalanche onset range; ensures predictable clamping initiation under transients. |
| VC (Clamping Voltage) | 70.1 V at 5.7 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy-handling capability for standard lightning/surge waveforms; validated per IEC 61000-4-5. |
| IPPM (Peak Pulse Current) | 5.7 A - Maximum non-repetitive surge current the device can safely shunt without degradation. |
| TJmax | 150 °C - Maximum junction temperature limit; sets thermal design boundary for PCB pad layout and power derating. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 0.208" length and cathode band marking; compatible with automated placement. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional configuration with cathode indicated by a band on the body. Dimensions: 5.28 mm × 3.99 mm × 2.29 mm (L × W × H); terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to lower-potential side of protected line. | Provides low-forward-voltage path during fault conditions; must be routed to ground or return plane for clamping action. |
| Cathode | Current exit point in forward bias; marked by band; connected to higher-potential line (e.g., VIN, signal). | Defines polarity-sensitive placement; reverse-biased during normal operation; conducts only during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 3 surges (1 kV/2 Ω) on 12–48 V systems without derating. |
| Glass-passivated junction | Ensures stable VBR tolerance (±5%), low leakage (<1 µA), and long-term reliability under thermal cycling. |
| MSL Level 1 (J-STD-020) | Allows unlimited floor life and reflow compatibility up to 260 °C peak, eliminating moisture sensitivity handling constraints. |
| AEC-Q101 qualified option (HM3 suffix) | Validated for automotive powertrain and body electronics; supports PPAP documentation and zero-defect manufacturing requirements. |
| Halogen-free, RoHS-compliant (M3) | Meets IPC-1752A material declaration standards and EU Directive 2011/65/EU; eliminates brominated flame retardants. |
Applications
| Industrial Power Supply Protection | Automotive Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 48 V DC input rails in programmable logic controllers (PLCs) against load dump and inductive switching spikes. IC Role / Device Role: Unidirectional TVS placed between input rail and chassis ground to clamp transients before they reach DC-DC converters. Use Value: Limits voltage excursion to ≤70.1 V during 5.7 A surges, preventing damage to 75 V-rated input capacitors and controller ICs. |
Use Scenario: Safeguarding CAN and LIN bus transceivers in engine control units (ECUs) from battery voltage transients. IC Role / Device Role: Standoff-clamp TVS on VCC supply line upstream of transceiver, referenced to ground. Use Value: Maintains <43.6 V nominal operation while suppressing >100 V spikes within 1 ns response time, preserving signal integrity. |
| Consumer Equipment AC/DC Adapter Input | Telecom Base Station Power Monitoring |
|
Use Scenario: Secondary-side overvoltage protection in universal-input SMPS used in set-top boxes and network routers. IC Role / Device Role: Clamping diode across bulk capacitor to prevent overvoltage failure during feedback loop faults. Use Value: Activates at 48.5 V, clamps to 70.1 V, and absorbs 400 W pulses - extending capacitor lifetime and avoiding catastrophic failure. |
Use Scenario: Surge protection on 48 V backup power feeds for remote radio heads (RRHs) in 5G infrastructure. IC Role / Device Role: Primary-stage TVS on -48 V DC distribution line, mounted directly at connector entry point. Use Value: Withstands repeated 10/1000 µs surges up to 5.7 A while maintaining <1 µA leakage at 43.6 V, ensuring low standby loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51A (Bourns) | Same VWM (43.6 V), identical VC (70.1 V), but SMB package (DO-214AA) - 20% larger footprint and 10% higher RθJA. | Preferred where board space allows larger pad layout and higher thermal mass is needed for sustained surge duty. | Select SMBJ51A if existing layout uses SMB footprints or requires higher IFSM (100 A vs. 40 A). |
| 1.5SMC51A (ON Semiconductor) | Identical electrical specs (VWM, VBR, VC, PPPM), same SMA package, but E3 suffix only - not halogen-free or AEC-Q101 qualified. | Suitable for commercial-grade designs where RoHS compliance suffices and automotive qualification is unnecessary. | Choose 1.5SMC51A for cost-sensitive consumer applications without halogen-free or automotive requirements. |
Compared with SMBJ51A and 1.5SMC51A, P4SMA51A-M3/5A uniquely combines halogen-free construction, MSL Level 1 reflow compatibility, and optional AEC-Q101 qualification - making it optimal for high-reliability industrial and automotive programs requiring full material compliance and traceable sourcing.
Availability
P4SMA51A-M3/5A is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor modules, telecom infrastructure, and consumer power adapters requiring stable component supply, halogen-free compliance, and AEC-Q101-ready variants.
Supply support for P4SMA51A-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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade validation.
The P4SMA series was engineered for high-volume, surface-mount transient suppression in space-constrained applications - balancing 400 W surge capability, low-profile packaging, and qualification-ready variants for automotive and industrial end markets.
FAQ
What is the maximum clamping voltage of P4SMA51A-M3/5A under a 10/1000 µs surge?
The maximum clamping voltage (VC) of P4SMA51A-M3/5A is 70.1 V at 5.7 A peak pulse current with a 10/1000 µs waveform. This value is measured per standard test conditions and defines the upper voltage limit imposed on protected circuitry during transient events. The P4SMA51A-M3/5A maintains this clamping performance across its specified operating temperature range and is validated per JEDEC and IEC surge test protocols.
Is P4SMA51A-M3/5A suitable for automotive applications?
Yes - the M3 suffix indicates halogen-free, RoHS-compliant construction, and the P4SMA51A-M3/5A is eligible for AEC-Q101 qualification when ordered with HM3 suffix (e.g., P4SMA51AHM3_A/I). While the base P4SMA51A-M3/5A itself is commercial-grade, its design, thermal performance (TJmax = 150 °C), and mechanical robustness align with automotive subsystem requirements when paired with appropriate qualification codes and test reports.
What does the "/5A" in P4SMA51A-M3/5A indicate?
The "/5A" denotes the packaging configuration: 13-inch diameter plastic tape and reel containing 7500 units. This contrasts with "/61", which specifies a 7-inch reel holding 1800 units. Both formats use the same P4SMA51A-M3 die and SMA (DO-214AC) package; the suffix solely identifies reel size and quantity for automated assembly logistics.
How does the thermal resistance of P4SMA51A-M3/5A affect PCB layout?
P4SMA51A-M3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads. To maintain TJ ≤ 150 °C under 3.3 W steady-state dissipation, designers must ensure adequate copper area and avoid thermal bottlenecks - especially critical during repetitive surge events. The P4SMA51A-M3/5A benefits from additional thermal vias and ground-plane connections to reduce effective RθJA.
Can P4SMA51A-M3/5A replace bidirectional TVS diodes like P4SMA51CA?
No - P4SMA51A-M3/5A is unidirectional and must be oriented with cathode toward the protected line; it cannot suppress positive- and negative-going transients on the same node. The bidirectional P4SMA51CA provides symmetrical clamping but lacks polarity marking and has different VBR symmetry. Substituting P4SMA51A-M3/5A for P4SMA51CA requires circuit redesign to accommodate polarity and may compromise protection on AC-coupled or floating lines.
P4SMA51A-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):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 5.7A
- Power - Peak Pulse:
- 400W
- 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)
P4SMA51A-M3/5A FAQ
1.How can I place an order for P4SMA51A-M3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA51A-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 P4SMA51A-M3/5A reliable?
The price and inventory of P4SMA51A-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 P4SMA51A-M3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA51A-M3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA51A-M3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA51A-M3/5A?
P4SMA51A-M3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA51A-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 P4SMA51A-M3/5A?
For technical support, including P4SMA51A-M3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA51A-M3/5A requirements.
6.How does Aetrix verify that P4SMA51A-M3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA51A-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 P4SMA51A-M3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA51A-M3/5A?
All P4SMA51A-M3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA51A-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 P4SMA51A-M3/5A part is unused and in its original packaging.
Return procedure for P4SMA51A-M3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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