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Taiwan Semiconductor Corporation P4SMA56A
- Part No.:
- P4SMA56A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA56A.pdf
- Description:
- TVS DIODE 47.8VWM 77VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,051
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Product details
Overview
P4SMA56A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for overvoltage protection in DC power rails and signal lines. It features a 53.2–58.8 V breakdown voltage (VBR), 47.8 V working stand-off voltage (VWM), 77.0 V clamping voltage (VC) at 5.4 A peak pulse current, and 400 W peak pulse power rating under 10/1000 µs waveform - deployed in switching mode power supplies and on-board DC/DC converters.
For engineers reviewing the P4SMA56A datasheet, P4SMA56A pinout, P4SMA56A application, or P4SMA56A equivalent, key selection criteria include clamping performance at rated surge current, leakage current below 1 µA at VWM, DO-214AC (SMA) package compatibility with automated placement, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive electronics robustness.
Technical Context
The P4SMA56A operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve fast response (<1.0 ps) and stable breakdown characteristics. Its thermal design supports continuous operation from –55°C to +150°C junction temperature, with derating above 25°C ambient per published pulse derating curve.
It delivers precise overvoltage protection by clamping transients above 47.8 V while maintaining <1 µA reverse leakage - critical for low-power standby circuits. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements, confirming suitability for high-reliability industrial and automotive PCB assemblies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 53.2 V / 58.8 V at 1.0 mA test current - defines reliable turn-on threshold across process variation |
| VWM | 47.8 V - maximum continuous DC or RMS voltage before significant leakage begins |
| VC @ IPPM | 77.0 V at 5.4 A (10/1000 µs) - limits downstream voltage stress during surge events |
| PPPM | 400 W - peak transient power absorption capability without failure |
| IR @ VWM | <1 µA - ensures negligible standby current drain in battery-backed or energy-sensitive systems |
| TJ max | +150°C - enables operation in high-temperature environments such as engine compartments or enclosed power modules |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-diode configuration with cathode band marking. Matte tin-plated leads comply with J-STD-002 solderability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path | Connected to protected circuit ground or low-side reference; completes clamping loop during overvoltage |
| Cathode | Protected line input | Connected to line being safeguarded (e.g., +12 V rail); blocks normal operation, conducts during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures long-term stability of VBR and low parameter drift under thermal cycling and humidity exposure |
| Fast response time <1.0 ps | Clamps ESD and lightning-induced transients before sensitive ICs experience damage |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive load-dump and inductive-switching immunity per international standard |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking or special handling prior to assembly |
Applications
| Switching Mode Power Supply (SMPS) | On-Board DC/DC Converter |
|---|---|
Use Scenario: Protection of primary-side MOSFET gate drivers and secondary-side rectifier outputs against flyback spikes and cross-talk. IC Role / Device Role: Unidirectional TVS placed across input/output rails to clamp inductive kickback and line transients. Use Value: Limits VC to 77.0 V during 400 W surges, preventing MOSFET avalanche failure and ensuring >100,000-cycle reliability. | Use Scenario: Safeguarding 5 V or 3.3 V point-of-load regulators in automotive infotainment and ADAS ECUs. IC Role / Device Role: Rail-to-rail clamping element on regulated output to absorb coupled noise from adjacent switching stages. Use Value: Sub-1 µA leakage at 47.8 V VWM avoids loading regulation feedback networks and preserves accuracy. |
| Lighting Application | Adapters |
Use Scenario: Overvoltage suppression in LED driver front-ends exposed to mains surges and hot-plug events. IC Role / Device Role: Primary-line TVS on AC/DC bridge output or constant-current controller supply rail. Use Value: 400 W peak power rating handles IEC 61000-4-5 Level 3 (1 kV/2 kV) surges without degradation. | Use Scenario: Input-stage protection in wall-mounted AC/DC adapters for consumer electronics. IC Role / Device Role: Standoff-rated suppressor between rectified DC bus and primary controller IC. Use Value: DO-214AC (SMA) footprint enables automated placement and matches IPC-7351B land pattern for high-yield manufacturing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ56A (Bourns) | Same DO-214AA (SMB) package; 56 V VBR, 72 V VC @ 5.6 A; 600 W PPPM | Higher power rating but larger footprint - requires PCB layout change | Select when higher surge margin is needed and board space allows SMB package |
| 1.5SMC56A (ON Semiconductor) | DO-214AB (SMC) package; 56 V VBR, 93.6 V VC @ 4.3 A; 1500 W PPPM | Higher clamping voltage and much larger package - suited for primary-side industrial surge protection | Choose for front-end AC/DC inputs where 93.6 V clamping is acceptable and space permits SMC outline |
Compared with SMBJ56A and 1.5SMC56A, the P4SMA56A offers optimal balance of compact DO-214AC (SMA) size, 77.0 V clamping, and 400 W capability - making it ideal for space-constrained secondary-side protection where tight voltage margins and automated assembly are required.
Availability
P4SMA56A is available at Aetrix Electronics and suitable for switching mode power supplies, on-board DC/DC converters, and lighting applications requiring stable component supply, consistent parametric performance, and full traceability across production lots.
Supply support for P4SMA56A 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs - headquartered in Hsinchu Science Park, Taiwan.
The P4SMA56A belongs to TSC's P4SMAx series of surface-mount TVS diodes, engineered specifically for cost-effective, high-volume overvoltage protection in automotive, industrial, and consumer power conversion systems.
FAQ
What is the breakdown voltage range of the P4SMA56A?
The P4SMA56A has a guaranteed breakdown voltage (VBR) range of 53.2 V to 58.8 V at 1.0 mA test current, measured per ANSI/IEEE C62.35. This tight tolerance ensures predictable turn-on behavior across temperature and manufacturing lot variations, critical for repeatable system-level surge immunity validation.
Is the P4SMA56A unidirectional or bidirectional?
The P4SMA56A is a unidirectional TVS diode, indicated by the absence of "C" or "CA" suffix and confirmed by its cathode-band marking and single-diode DO-214AC configuration. It protects against positive-going transients only - reverse voltage beyond VWM must be avoided, unlike bidirectional variants such as P4SMA56CA.
What is the maximum clamping voltage of the P4SMA56A during a surge event?
The P4SMA56A clamps to a maximum of 77.0 V at 5.4 A peak pulse current under the standardized 10/1000 µs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during transient events - essential for verifying safe operating area of downstream components.
Does the P4SMA56A meet automotive surge immunity standards?
Yes, the P4SMA56A meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling), as explicitly stated in the official Taiwan Semiconductor datasheet revision S2102. This makes it suitable for 12 V and 24 V automotive subsystems including body control modules and infotainment power rails.
What is the moisture sensitivity level (MSL) of the P4SMA56A?
The P4SMA56A is rated MSL Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30°C/85% RH and subjected to standard SMT reflow profiles without preconditioning or baking. This eliminates handling overhead in high-mix manufacturing and supports just-in-time assembly workflows.
P4SMA56A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA
- 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):
- 5.4A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA56A FAQ
1.How can I place an order for P4SMA56A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA56A 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 reliable?
The price and inventory of P4SMA56A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA56A is usually 5 days.
3.What payment methods are accepted for P4SMA56A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA56A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA56A?
P4SMA56A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA56A 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?
For technical support, including P4SMA56A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA56A requirements.
6.How does Aetrix verify that P4SMA56A is sourced from the original manufacturer or authorized distributors?
All P4SMA56A 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 meets industry standards.
7.What is the process for return or replacement of P4SMA56A?
All P4SMA56A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA56A, 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 part is unused and in its original packaging.
Return procedure for P4SMA56A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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