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Taiwan Semiconductor Corporation P4SMA56
- Part No.:
- P4SMA56
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA56.pdf
- Description:
- 400W, 56V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:4,887
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Product details
Overview
P4SMA56 from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for overvoltage protection in DC power lines and signal paths. It features a 50.4–61.6 V breakdown voltage (VBR), 45.4 V working stand-off voltage (VWM), 80.5 V maximum clamping voltage (VC) at 5.2 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 P4SMA56 datasheet, P4SMA56 pinout, P4SMA56 application, or P4SMA56 equivalent, key selection criteria include its DO-214AC (SMA) package compatibility, low leakage (<1 µA at VWM), fast sub-1 ps response time, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and junction temperature range of –55°C to +150°C.
Technical Context
The P4SMA56 operates as a unidirectional avalanche diode with glass-passivated junction, optimized for clamping transient surges on positive-polarity DC rails. Its electrical behavior follows IEEE C62.35 standards, with breakdown tested at 1.0 mA and clamping verified under standardized 10/1000 µs impulse waveform.
Thermal derating begins above 25°C ambient per Figure 2, and peak power dissipation is limited to 400 W for non-repetitive pulses. The device exhibits a temperature coefficient of VBR of 0.103 %/°C, enabling predictable voltage drift across operating temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 50.4 V / 61.6 V at 1.0 mA test current - defines reliable avalanche initiation window |
| VWM | 45.4 V - maximum continuous reverse voltage before significant leakage |
| VC @ IPPM | 80.5 V at 5.2 A (10/1000 µs) - clamping voltage limiting downstream component stress |
| IR @ VWM | <1 µA - ensures minimal standby power loss in high-impedance circuits |
| PPPM | 400 W - surge energy handling capacity for automotive and industrial transients |
| TJ range | –55°C to +150°C - supports operation in under-hood, industrial, and enclosed power electronics |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-diode configuration with cathode band marking. Matte tin-plated leads, JEDEC-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal for forward conduction | Connected to protected line's lower-potential side (e.g., GND return path) |
| Cathode | Protected-side terminal (marked band) | Connected to the line being safeguarded (e.g., +48 V rail); conducts during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress |
| 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 requirements |
| UL 94V-0 molding compound | Meets flammability safety standards for enclosed power supply and lighting applications |
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 switching spikes and cross-talk. IC Role / Device Role: Unidirectional TVS placed across input/output rails to clamp induced transients below MOSFET VDS and diode reverse voltage ratings. Use Value: Prevents cumulative degradation of power semiconductors by limiting peak voltage to 80.5 V during 400 W surges. | Use Scenario: Safeguarding isolated feedback paths and synchronous rectifier control signals in compact point-of-load regulators. IC Role / Device Role: Standoff-rated clamping element on 12 V or 24 V output rails where space-constrained layout demands SMA footprint. Use Value: Enables robust operation at –55°C to +150°C ambient without derating loss, critical for embedded industrial modules. |
| Lighting Application | Adapters |
Use Scenario: Overvoltage suppression on LED driver inputs exposed to mains-borne surges and hot-plug events in commercial LED fixtures. IC Role / Device Role: Primary-line TVS on AC/DC front-end, positioned ahead of bridge rectifier to absorb differential-mode transients. Use Value: Withstands 40 A IFSM (8.3 ms half-sine) and maintains <1 µA leakage at 45.4 V, minimizing standby current in always-on lighting systems. | Use Scenario: Input-stage protection in universal-input wall adapters subject to EN 61000-4-5 surge testing and line fault conditions. IC Role / Device Role: Unidirectional clamping diode across bulk capacitor terminals to limit voltage overshoot during no-load or sudden load removal. Use Value: Delivers 80.5 V clamping at 5.2 A with 0.103 %/°C VBR drift - ensuring consistent protection margin across adapter operating temperatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ56A | DO-214AA (SMB) package; 600 W PPPM; VC = 93.6 V @ 6.4 A | Higher power rating but larger footprint; less suitable for ultra-compact layouts | Select when higher surge margin is required and PCB space allows SMB footprint |
| 1.5SMC56A | DO-214AB (SMC) package; 1500 W PPPM; VC = 93.6 V @ 16.0 A | Designed for heavy-duty industrial transients; incompatible with SMA land pattern | Choose for high-energy environments (e.g., motor drives) where SMC mounting is acceptable |
Compared with SMBJ56A and 1.5SMC56A, the P4SMA56 offers optimal balance of 400 W surge capability, DO-214AC (SMA) compactness, and precise 45.4 V standoff - making it ideal for space-limited consumer and industrial power supplies where strict VWM margin and thermal stability are prioritized.
Availability
P4SMA56 is available at Aetrix Electronics and suitable for switching mode power supplies, on-board DC/DC converters, and lighting applications requiring stable component supply, RoHS/halogen-free compliance, and J-STD-020 Level 1 moisture sensitivity handling.
Supply support for P4SMA56 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 protection components for industrial, computing, and consumer markets.
The P4SMA56 belongs to TSC's P4SMAx series of surface-mount TVS diodes - engineered specifically for high-reliability, automated-assembly overvoltage protection in compact power conversion systems.
FAQ
What is the polarity configuration of the P4SMA56?
The P4SMA56 is a unidirectional TVS diode, with cathode indicated by a band on the DO-214AC (SMA) package. It conducts only during reverse overvoltage events on the cathode-connected line, making it suitable for protecting positive-rail DC systems. Unlike bidirectional variants (e.g., P4SMA56A), the P4SMA56 does not conduct symmetrically - its forward voltage is 3.5 V at 25 A, and it must be oriented with cathode toward the protected node.
Does the P4SMA56 meet automotive transient immunity standards?
Yes, the P4SMA56 meets ISO 7637-2 requirements for Pulse 1, 2a, 2b, 3a, and 3b, covering typical automotive electrical disturbances including load dump, alternator ripple, and inductive switching transients. Its 400 W peak pulse power rating and 80.5 V clamping voltage at 5.2 A ensure effective suppression of these waveforms when correctly applied in the vehicle power distribution network.
What is the maximum allowable junction temperature for the P4SMA56?
The P4SMA56 has a maximum junction temperature (TJMAX) of +150°C and a minimum of –55°C. Derating of peak pulse power begins above 25°C ambient per the manufacturer's Pulse Derating Curve (Figure 2). At 100°C ambient, the device retains approximately 60% of its 400 W rating - critical for thermal design in enclosed power supplies and LED drivers.
How does the P4SMA56 differ from the P4SMA56A variant?
The P4SMA56 and P4SMA56A differ in breakdown voltage tolerance and clamping performance: P4SMA56 has VBR = 50.4–61.6 V and VC = 80.5 V, while P4SMA56A tightens VBR to 53.2–58.8 V and lowers VC to 77.0 V. Both share identical DO-214AC packaging, 400 W rating, and unidirectional polarity. The 'A' suffix denotes tighter VBR tolerance (±5% vs. ±10%), enabling more precise voltage margining in noise-sensitive designs.
Is the P4SMA56 compatible with lead-free reflow soldering processes?
Yes, the P4SMA56 features matte tin-plated leads compliant with J-STD-002 for solderability and is rated for moisture sensitivity level 1 per J-STD-020 - meaning it can be stored indefinitely at ≤30°C/85% RH without baking prior to assembly. Its UL 94V-0 molding compound withstands standard lead-free reflow profiles (peak ~260°C), supporting automated placement and RoHS-compliant manufacturing.
P4SMA56 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):
- 45.4V
- Voltage - Breakdown (Min):
- 50.4V
- Voltage - Clamping (Max) @ Ipp:
- 80.5V
- Current - Peak Pulse (10/1000µs):
- 5.2A
- 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)
P4SMA56 FAQ
1.How can I place an order for P4SMA56 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA56 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 P4SMA56 reliable?
The price and inventory of P4SMA56 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA56 is usually 5 days.
3.What payment methods are accepted for P4SMA56?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA56 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA56?
P4SMA56 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA56 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 P4SMA56?
For technical support, including P4SMA56 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA56 requirements.
6.How does Aetrix verify that P4SMA56 is sourced from the original manufacturer or authorized distributors?
All P4SMA56 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 P4SMA56 meets industry standards.
7.What is the process for return or replacement of P4SMA56?
All P4SMA56 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA56, 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 P4SMA56 part is unused and in its original packaging.
Return procedure for P4SMA56:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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