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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Taiwan Semiconductor Corporation P4SMA11

Name: P4SMA11
Brand: Taiwan Semiconductor Corporation
SKU: P4SMA11
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: P4SMA11

Manufacturer:: Taiwan Semiconductor Corporation

Category:: TVS Diodes

Package:: DO-214AC, SMA

Datasheet:: P4SMA11.pdf

Description:: 400W, 11V, 10%, UNIDIRECTIONAL,

Quantity:: RFQ Add To RFQ list

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Inventory:6,459

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Product details

Overview

P4SMA11 from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for overvoltage protection in DC power rails. It features a 9.9–12.1 V breakdown voltage (V_BR), 8.92 V working stand-off voltage (V_WM), 16.2 V clamping voltage (V_C) at 26 A peak pulse current, and 400 W peak pulse power rating under 10/1000 µs waveform.

For engineers reviewing the P4SMA11 datasheet, P4SMA11 pinout, P4SMA11 application, or P4SMA11 equivalent, key selection considerations include its low leakage (<1 µA at V_WM), fast response (<1.0 ps), ISO 7637-2 compliance for automotive transients, and suitability for compact board-level surge protection in power supplies and DC/DC converters.

Technical Context

The P4SMA11 operates as a unidirectional avalanche diode with glass-passivated junction, enabling precise voltage clamping during ESD or surge events. Its 150 °C maximum junction temperature and -55 to +150 °C operating range support industrial and automotive ambient conditions.

It delivers 26 A peak impulse current (I_PPM) under standardized 10/1000 µs waveform while maintaining clamping at ≤16.2 V - critical for protecting downstream 12 V logic or analog circuitry. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements for reliable long-term mounting.

Key Specifications

Parameter	Value and Actual Design Meaning
V_BR (min/max)	9.90–12.10 V at 1.0 mA test current - defines reliable avalanche onset range for consistent clamping behavior
V_WM	8.92 V - maximum continuous reverse voltage before significant leakage; sets safe operating margin below system nominal 12 V rail
V_C @ I_PPM	16.2 V at 26 A, 10/1000 µs - limits protected node voltage during worst-case surge, preserving 12 V IC tolerance
P_PPM	400 W - peak transient power handling capacity under standard surge waveform
I_R @ V_WM	<1 µA - ensures negligible standby power loss and no interference with high-impedance sensing circuits
T_J max	+150 °C - enables operation in enclosed or thermally stressed environments without derating
Package	DO-214AC (SMA) - industry-standard SMD outline compatible with automated placement and reflow

Pinout & Package

DO-214AC (SMA) surface-mount package with cathode band marking; two-terminal unidirectional configuration. Matte tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker resistance standards.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal	Connected to system ground or lower-potential rail; conducts during forward surge or bias
Cathode	Clamping reference terminal	Connected to protected line (e.g., 12 V input); avalanche conduction occurs when voltage exceeds V_BR

Key Features

Feature	Design Value
Glass passivated junction	Ensures stable V_BR tolerance and long-term reliability under thermal cycling and humidity stress
Fast response time <1.0 ps	Clamps ESD and fast transients before sensitive ICs experience overstress
ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance	Validated for automotive load-dump and inductive-switching immunity per OEM requirements
Moisture sensitivity level 1 (J-STD-020)	Enables standard SMT assembly without baking or special handling
RoHS & halogen-free (IEC 61249-2-21)	Meets global environmental compliance for consumer, industrial, and automotive end equipment

Applications

Switching Mode Power Supply (SMPS)	On-board DC/DC Converter
Use Scenario: Input stage of AC/DC adapter or offline SMPS subjected to line surges and coupling noise. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed across primary-side bulk capacitor or secondary-side output rail. Use Value: Clamps 400 W transients to ≤16.2 V, preventing MOSFET gate oxide failure and controller latch-up in 12 V output designs.	Use Scenario: 48 V-to-12 V or 24 V-to-5 V point-of-load converter in industrial PLC or telecom shelf. IC Role / Device Role / Timing Role: Secondary-side transient protector on regulated output, adjacent to load switch or LDO input. Use Value: Sub-1 µA leakage avoids loading feedback networks; DO-214AC footprint allows placement within tight layout constraints near connector or connector-filter interface.
Lighting Application	Automotive Body Control Module
Use Scenario: LED driver input in streetlight or commercial luminaire exposed to lightning-induced surges on long feeder lines. IC Role / Device Role / Timing Role: Primary-side surge clamp on DC bus feeding constant-current LED driver IC. Use Value: 150 °C T_J rating supports operation inside sealed, thermally insulated housings; UL 94V-0 molding compound resists flame propagation in plastic enclosures.	Use Scenario: CAN/LIN bus power rail or sensor supply line in BCM exposed to battery dump and load-switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS on 12 V switched supply feeding microcontroller I/O or LIN transceiver V_CC. Use Value: ISO 7637-2 certification ensures robustness against real-world automotive pulses; cathode-band polarity marking prevents misorientation during automated assembly.

Switching Mode Power Supply (SMPS)

On-board DC/DC Converter

Use Scenario: Input stage of AC/DC adapter or offline SMPS subjected to line surges and coupling noise.

IC Role / Device Role / Timing Role: Unidirectional TVS diode placed across primary-side bulk capacitor or secondary-side output rail.

Use Value: Clamps 400 W transients to ≤16.2 V, preventing MOSFET gate oxide failure and controller latch-up in 12 V output designs.

Use Scenario: 48 V-to-12 V or 24 V-to-5 V point-of-load converter in industrial PLC or telecom shelf.

IC Role / Device Role / Timing Role: Secondary-side transient protector on regulated output, adjacent to load switch or LDO input.

Use Value: Sub-1 µA leakage avoids loading feedback networks; DO-214AC footprint allows placement within tight layout constraints near connector or connector-filter interface.

Lighting Application

Automotive Body Control Module

Use Scenario: LED driver input in streetlight or commercial luminaire exposed to lightning-induced surges on long feeder lines.

IC Role / Device Role / Timing Role: Primary-side surge clamp on DC bus feeding constant-current LED driver IC.

Use Value: 150 °C T_J rating supports operation inside sealed, thermally insulated housings; UL 94V-0 molding compound resists flame propagation in plastic enclosures.

Use Scenario: CAN/LIN bus power rail or sensor supply line in BCM exposed to battery dump and load-switching transients.

IC Role / Device Role / Timing Role: Unidirectional TVS on 12 V switched supply feeding microcontroller I/O or LIN transceiver V_CC.

Use Value: ISO 7637-2 certification ensures robustness against real-world automotive pulses; cathode-band polarity marking prevents misorientation during automated assembly.

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient voltage suppression applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ11A	600 W rating, DO-214AA (SMB) package, 11.1 V V_WM, 18.2 V V_C @ 33 A	Higher power handling but larger footprint; requires PCB area increase	Select when higher surge margin is required and board space permits SMB package
1.5SMC11A	1500 W rating, DO-214AB (SMC) package, 9.4 V V_WM, 18.2 V V_C @ 83 A	Substantially larger package and higher clamping voltage; suited for main rail protection	Choose only for primary-side front-end protection where 400 W is insufficient

Compared with P4SMA11, SMBJ11A offers greater surge margin in a slightly larger DO-214AA package, while 1.5SMC11A targets high-energy front-end protection with triple the power rating but incompatible footprint and clamping profile - making P4SMA11 optimal for space-constrained, secondary-side 12 V rail protection.

Availability

P4SMA11 is available at Aetrix Electronics and suitable for switching mode power supplies, on-board DC/DC converters, and lighting applications requiring stable component supply with full traceability and lifecycle management.

Supply support for P4SMA11 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 for industrial and automotive markets.

The P4SMA series is part of TSC's surface-mount TVS portfolio engineered for high-reliability transient suppression in compact, cost-sensitive power systems - emphasizing low leakage, precise V_BR, and automotive-grade qualification.

FAQ

What is the polarity configuration of the P4SMA11?

The P4SMA11 is a unidirectional TVS diode with cathode band marking indicating the cathode terminal. It conducts in reverse avalanche mode during overvoltage events and blocks forward current up to 3.5 V at 25 A. This polarity must be observed during PCB layout to ensure correct clamping direction on the protected line.

Does the P4SMA11 meet automotive transient standards?

Yes, the P4SMA11 meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for electrical disturbances in road vehicles. Its 400 W peak pulse power and 16.2 V clamping voltage at 26 A enable robust protection of 12 V automotive subsystems such as body control modules and lighting drivers without additional external filtering.

What is the maximum junction temperature rating for the P4SMA11?

The P4SMA11 has a maximum junction temperature (T_J) of +150 °C and a storage temperature range of -55 to +150 °C. This rating supports operation in thermally demanding environments including enclosed LED drivers, industrial power supplies, and under-hood automotive electronics when mounted with adequate copper pour and thermal relief.

How does the P4SMA11 compare to the P4SMA11A variant?

The P4SMA11A has tighter V_BR tolerance (10.5–11.6 V vs. 9.9–12.1 V), higher V_WM (9.40 V vs. 8.92 V), and lower V_C (15.6 V vs. 16.2 V) at 27 A. Both share identical DO-214AC packaging and 400 W rating, but P4SMA11A provides improved voltage margin for precision 12 V rail protection where tighter clamping is critical.

Is the P4SMA11 RoHS and halogen-free compliant?

Yes, the P4SMA11 is RoHS compliant and halogen-free per IEC 61249-2-21. Its molding compound meets UL 94V-0 flammability rating, and matte tin-plated leads comply with J-STD-002 solderability and JESD201 Class 2 whisker resistance - satisfying environmental and reliability requirements for consumer, industrial, and automotive end products.

P4SMA11 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):: 8.92V

Voltage - Breakdown (Min):: 9.9V

Voltage - Clamping (Max) @ Ipp:: 16.2V

Current - Peak Pulse (10/1000µs):: 26A

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)

P4SMA11 FAQ

1.How can I place an order for P4SMA11 through Aetrix?

Please submit a Request for Quotation (RFQ) for P4SMA11 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 P4SMA11 reliable?

The price and inventory of P4SMA11 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA11 is usually 5 days.

3.What payment methods are accepted for P4SMA11?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA11 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for P4SMA11?

P4SMA11 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your P4SMA11 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 P4SMA11?

For technical support, including P4SMA11 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA11 requirements.

6.How does Aetrix verify that P4SMA11 is sourced from the original manufacturer or authorized distributors?

All P4SMA11 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 P4SMA11 meets industry standards.

7.What is the process for return or replacement of P4SMA11?

All P4SMA11 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA11, 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 P4SMA11 part is unused and in its original packaging.

Return procedure for P4SMA11:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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