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Vishay General Semiconductor - Diodes Division P4SMA56A-M3/5A
- Part No.:
- P4SMA56A-M3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA56A-M3/5A.pdf
- Description:
- TVS DIODE 47.8VWM 77VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,561
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Product details
Overview
P4SMA56A-M3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 56 V breakdown voltage (VBR = 53.2–58.8 V at 1 mA), 47.8 V standoff voltage (VWM), 77.0 V maximum clamping voltage (VC) at 5.2 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the P4SMA56A-M3/5A datasheet, P4SMA56A-M3/5A pinout, P4SMA56A-M3/5A application, or P4SMA56A-M3/5A equivalent, key selection criteria include unidirectional polarity, SMA package thermal resistance (RθJA = 120 °C/W), AEC-Q101 qualification status (not applicable to M3 suffix), halogen-free RoHS compliance, and clamping performance under repetitive surge conditions.
Technical Context
This TVS diode operates as a fast-acting shunt protector: when reverse voltage exceeds VWM (47.8 V), it transitions from high-impedance blocking to low-impedance conduction within <1 ps, diverting transient energy to ground. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at VWM).
The device sustains 400 W peak pulse power only up to 91 V; above that threshold, derating applies (300 W). Thermal design must account for RθJL = 30 °C/W (junction-to-lead) and mounting on 0.2" × 0.2" copper pads per terminal to meet power dissipation limits (PD = 3.3 W at TA = 50 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 53.2 V / 58.8 V at IT = 1 mA - defines precise voltage threshold where avalanche conduction begins |
| VWM | 47.8 V - maximum continuous reverse operating voltage before significant leakage occurs |
| VC @ IPPM | 77.0 V at 5.2 A - clamped voltage during 10/1000 µs surge, limiting stress on downstream components |
| PPPM | 400 W - peak transient power handling capability under standard 10/1000 µs waveform |
| IFSM | 40 A - single half-sine surge current rating (8.3 ms), relevant for inductive turn-off events |
| TJ max. | +150 °C - maximum junction temperature, constraining PCB layout and ambient operating range |
| Package | SMA (DO-214AC) - surface-mount outline with 5.28 mm length, 3.99 mm width, and 2.29 mm height |
Pinout & Package
SMA (DO-214AC) package with molded epoxy body, matte tin-plated leads, and cathode band marking for unidirectional polarity. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for thermal and mechanical reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected line in unidirectional configuration | Low forward voltage drop (~3.5 V at 25 A) enables use in DC power rail protection |
| Cathode | Current exit point in forward bias; tied to ground or reference plane | Cathode band identifies polarity; critical for correct orientation during automated placement |
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 V systems |
| 77.0 V clamping voltage at 5.2 A | Limits voltage overshoot across protected ICs to safe levels during transient events |
| Glass passivated junction | Ensures long-term stability of VBR and low parameter drift over temperature and life |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture sensitivity concerns |
| Halogen-free & RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for industrial and consumer end equipment |
Applications
| Industrial Power Supply Protection | Automotive Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 48 V DC input rails in programmable logic controllers (PLCs) from load dump and inductive switching transients. IC Role / Device Role / Timing Role: Shunt TVS diode placed between input rail and chassis ground, activated within picoseconds upon overvoltage detection. Use Value: Clamps transients to ≤77.0 V, preventing damage to upstream DC-DC converters rated for 60 V absolute maximum input. |
Use Scenario: Safeguarding CAN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) in engine control units. IC Role / Device Role / Timing Role: Unidirectional TVS on VCC supply line and signal lines, absorbing ESD and ISO 7637-2 pulse 1/2a/3a energy. Use Value: Withstands 40 A surge current (IFSM) and maintains <1 µA leakage at 47.8 V, preserving signal integrity and low-power operation. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Guarding Ethernet PHY power pins and auxiliary 12 V bias rails in network switches exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device on secondary-side DC distribution, coordinated with upstream GDT or MOV. Use Value: 400 W peak power rating supports coordination with system-level surge standards (ITU-T K.20/K.21) without thermal runaway. |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Mounted across motor terminals or H-bridge outputs to clamp inductive kickback during PWM commutation. Use Value: Fast response time and low incremental surge resistance minimize voltage overshoot, reducing MOSFET avalanche stress and improving reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58A | Higher VWM (49.5 V), same VC (77.0 V), SMB package (larger footprint, lower RθJA = 100 °C/W) | Better thermal performance in high-duty-cycle environments; requires PCB area increase | Select SMBJ58A when board space allows and higher average power dissipation is needed |
| 1.5SMC56A | Same VBR/VC, larger SMC package (DO-214AB), higher PPPM (1500 W), RθJA = 60 °C/W | Superior surge handling for infrequent but extreme transients (e.g., AC mains coupling) | Choose 1.5SMC56A for mission-critical protection where peak energy exceeds 400 W capability |
Compared with SMBJ58A and 1.5SMC56A, P4SMA56A-M3/5A offers optimal balance of compact SMA footprint, 400 W surge rating, and halogen-free compliance - ideal for space-constrained industrial and telecom designs requiring consistent RoHS adherence without thermal derating penalties.
Availability
P4SMA56A-M3/5A is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor modules, telecom line cards, and consumer appliance motor drives requiring stable component supply, halogen-free compliance, and surface-mount manufacturability.
Supply support for P4SMA56A-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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series targets cost-sensitive, high-volume transient protection needs in consumer, industrial, and telecom systems - delivering standardized 400 W surge capability in compact SMA packages with rigorous process control and qualification.
FAQ
What is the maximum clamping voltage of P4SMA56A-M3/5A under surge conditions?
The P4SMA56A-M3/5A has a maximum clamping voltage (VC) of 77.0 V at 5.2 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is measured under specified test conditions (mounted on 0.2" × 0.2" copper pads) and represents the upper limit of voltage seen by protected circuitry during transient events. Exceeding IPPM will increase VC nonlinearly.
Is P4SMA56A-M3/5A qualified to AEC-Q101 for automotive use?
No, P4SMA56A-M3/5A is not AEC-Q101 qualified. The M3 suffix indicates halogen-free and RoHS-compliant commercial-grade construction. For automotive applications, Vishay specifies AEC-Q101 variants with HE3 or HM3 suffixes (e.g., P4SMA56AHE3_A); P4SMA56A-M3/5A is intended for industrial, telecom, and consumer equipment where automotive qualification is not required.
What is the standoff voltage (VWM) of P4SMA56A-M3/5A and why does it matter?
The standoff voltage (VWM) of P4SMA56A-M3/5A is 47.8 V - the maximum continuous reverse voltage the device can block without exceeding 1 µA leakage current. This parameter ensures reliable operation below the clamping threshold, preventing false triggering during normal system operation while maintaining low power loss and signal integrity on protected lines.
Can P4SMA56A-M3/5A be used in bidirectional configurations?
No, P4SMA56A-M3/5A is a unidirectional TVS diode, identifiable by its cathode band marking. Bidirectional operation requires a CA-suffixed part (e.g., P4SMA56CA). Using P4SMA56A-M3/5A in reverse-biased AC applications would result in forward conduction and failure; always match polarity and device type to circuit topology.
What is the thermal resistance of P4SMA56A-M3/5A and how does it affect layout?
P4SMA56A-M3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended pad layout (0.2" × 0.2" copper pads per terminal). To avoid thermal saturation during repetitive surges, PCB layout must provide adequate copper area and avoid isolation - insufficient copper increases RθJA, raising junction temperature beyond the +150 °C maximum.
P4SMA56A-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):
- 47.8V
- Voltage - Breakdown (Min):
- 53.2V
- Voltage - Clamping (Max) @ Ipp:
- 77V
- Current - Peak Pulse (10/1000µs):
- 5.2A
- 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)
P4SMA56A-M3/5A FAQ
1.How can I place an order for P4SMA56A-M3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA56A-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 P4SMA56A-M3/5A reliable?
The price and inventory of P4SMA56A-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 P4SMA56A-M3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA56A-M3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA56A-M3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA56A-M3/5A?
P4SMA56A-M3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA56A-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 P4SMA56A-M3/5A?
For technical support, including P4SMA56A-M3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA56A-M3/5A requirements.
6.How does Aetrix verify that P4SMA56A-M3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA56A-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 P4SMA56A-M3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA56A-M3/5A?
All P4SMA56A-M3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA56A-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 P4SMA56A-M3/5A part is unused and in its original packaging.
Return procedure for P4SMA56A-M3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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