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

Taiwan Semiconductor Corporation P4SMA22

Name: P4SMA22
Brand: Taiwan Semiconductor Corporation
SKU: P4SMA22
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: P4SMA22

Manufacturer:: Taiwan Semiconductor Corporation

Category:: TVS Diodes

Package:: DO-214AC, SMA

Datasheet:: P4SMA22.pdf

Description:: 400W, 22V, 10%, UNIDIRECTIONAL,

Quantity:: RFQ Add To RFQ list

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Inventory:8,807

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Product details

Overview

P4SMA22 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 19.8–24.2 V breakdown voltage (V_BR), 17.8 V working stand-off voltage (V_WM), 31.9 V clamping voltage (V_C) at 13.0 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 P4SMA22 datasheet, P4SMA22 pinout, P4SMA22 application, or P4SMA22 equivalent, key selection criteria include its DO-214AC (SMA) package compatibility, <1 ps response time, ≤1 µA reverse leakage at V_WM, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and junction temperature range of –55°C to +150°C.

Technical Context

The P4SMA22 operates as a unidirectional avalanche diode with glass-passivated junction, optimized for fast transient suppression in low-inductance PCB layouts. Its clamping behavior is defined by a 10/1000 µs double-exponential surge waveform, delivering 31.9 V maximum clamping voltage at 13.0 A peak impulse current while maintaining <1 µA leakage above 17.8 V.

Thermal derating follows a linear curve above 25°C ambient, with full 400 W capability only at T_A = 25°C and reduced to zero at T_A = 150°C. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1 - enabling standard reflow assembly without baking.

Key Specifications

Parameter	Value and Actual Design Meaning
V_BR min/max	19.8 V / 24.2 V at 1.0 mA test current - defines minimum and maximum guaranteed avalanche initiation threshold
V_WM	17.8 V - maximum continuous reverse operating voltage before significant leakage begins
V_C @ I_PPM	31.9 V at 13.0 A (10/1000 µs) - peak voltage seen across protected circuit during worst-case surge
P_PPM	400 W - maximum non-repetitive surge power dissipation capability
I_R @ V_WM	≤1 µA - ensures minimal standby power loss and signal integrity in high-impedance circuits
T_J max	+150°C - enables operation in thermally demanding environments such as enclosed power adapters
Response time	<1.0 ps - ensures suppression occurs before sensitive downstream ICs experience overstress

Pinout & Package

Package: DO-214AC (SMA), surface-mount, single-diode configuration with cathode band marking. Case meets UL 94V-0 flammability rating; matte tin-plated leads comply with J-STD-002 solderability.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal	Connected to lower-potential side (e.g., GND or return path) in unidirectional TVS configuration
Cathode	Avalanche clamping terminal	Connected to protected line (e.g., +12 V rail); conducts when transient 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
ISO 7637-2 compliance	Validated for automotive load-dump and supply transients (Pulse 1, 2a, 2b, 3a, 3b) without external filtering
Moisture sensitivity level 1	Permits standard SMT reflow without pre-bake - reduces manufacturing overhead and moisture-related defects
RoHS & halogen-free	Complies with IEC 61249-2-21 and EU RoHS directives - supports green electronics design and export requirements
Fast response <1 ps	Clamps transients before propagation into sensitive analog or digital circuitry - critical for USB, RS-485, and SMPS feedback paths

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-induced voltage spikes and ESD events. IC Role / Device Role / Timing Role: Unidirectional TVS placed across input/output rails to clamp surges before they reach controller ICs or power MOSFETs. Use Value: Limits V_C to 31.9 V at 13 A, preventing damage to 36 V-rated controllers and ensuring >1.8 V margin below typical 33 V rail overvoltage thresholds.	Use Scenario: Input-side surge suppression for point-of-load (POL) converters in industrial PLCs and telecom base stations. IC Role / Device Role / Timing Role: Standoff voltage (17.8 V) matches nominal 15 V or 12 V input rails; clamps transients within 1 ps to protect buck controller enable pins and feedback dividers. Use Value: ≤1 µA leakage at V_WM avoids loading precision feedback networks; DO-214AC footprint allows compact placement near connector entry points.
Lighting Application	Adapter Protection
Use Scenario: Overvoltage protection in LED driver modules subjected to lightning-induced surges on AC mains or DC bus lines. IC Role / Device Role / Timing Role: Mounted across bulk capacitor terminals to absorb energy from induced transients before reaching constant-current ICs. Use Value: 400 W peak power rating handles repetitive 10/1000 µs surges per IEC 61000-4-5 Level 3; 150°C T_J max supports sealed luminaire thermal environments.	Use Scenario: Secondary-side output rail protection in wall-mounted AC/DC adapters powering consumer electronics. IC Role / Device Role / Timing Role: Placed between +5 V or +9 V output and ground to suppress coupling from primary-side switching noise and ESD from USB ports. Use Value: Cathode-band polarity marking ensures correct orientation; SMA package withstands reflow and mechanical stress during automated assembly.

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-induced voltage spikes and ESD events.

IC Role / Device Role / Timing Role: Unidirectional TVS placed across input/output rails to clamp surges before they reach controller ICs or power MOSFETs.

Use Value: Limits V_C to 31.9 V at 13 A, preventing damage to 36 V-rated controllers and ensuring >1.8 V margin below typical 33 V rail overvoltage thresholds.

Use Scenario: Input-side surge suppression for point-of-load (POL) converters in industrial PLCs and telecom base stations.

IC Role / Device Role / Timing Role: Standoff voltage (17.8 V) matches nominal 15 V or 12 V input rails; clamps transients within 1 ps to protect buck controller enable pins and feedback dividers.

Use Value: ≤1 µA leakage at V_WM avoids loading precision feedback networks; DO-214AC footprint allows compact placement near connector entry points.

Lighting Application

Adapter Protection

Use Scenario: Overvoltage protection in LED driver modules subjected to lightning-induced surges on AC mains or DC bus lines.

IC Role / Device Role / Timing Role: Mounted across bulk capacitor terminals to absorb energy from induced transients before reaching constant-current ICs.

Use Value: 400 W peak power rating handles repetitive 10/1000 µs surges per IEC 61000-4-5 Level 3; 150°C T_J max supports sealed luminaire thermal environments.

Use Scenario: Secondary-side output rail protection in wall-mounted AC/DC adapters powering consumer electronics.

IC Role / Device Role / Timing Role: Placed between +5 V or +9 V output and ground to suppress coupling from primary-side switching noise and ESD from USB ports.

Use Value: Cathode-band polarity marking ensures correct orientation; SMA package withstands reflow and mechanical stress 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
SMBJ22A	DO-214AA (SMB) package; 22 V nominal V_BR; 35.5 V V_C @ 11.3 A; same 400 W rating	Larger footprint (SMB vs SMA) requires PCB layout change; higher clamping voltage increases stress on downstream components	Select when higher surge current margin is needed and board space permits larger package
1.5SMC22A	DO-214AB (SMC) package; 22 V nominal V_BR; 36.0 V V_C @ 11.1 A; 1500 W rating	Substantially larger SMC package and higher power rating - over-specified for most 400 W use cases; not drop-in compatible	Choose only where legacy SMC footprint exists or multi-kW surge immunity is required beyond P4SMA22 capability

Compared with SMBJ22A and 1.5SMC22A, the P4SMA22 offers the smallest surface-mount footprint (DO-214AC) among 400 W TVS diodes at 22 V, with lowest clamping voltage (31.9 V) and tightest V_BR tolerance (±10%), making it optimal for space-constrained, precision-clamping designs.

Availability

P4SMA22 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 through production lifecycles.

Supply support for P4SMA22 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, Taiwan, with global distribution and AEC-Q200 qualified product lines.

The P4SMA22 belongs to TSC's P4SMA series of 400 W surface-mount TVS diodes, engineered specifically for cost-sensitive, high-volume industrial and consumer power systems needing robust, standardized surge protection with automated assembly compatibility.

FAQ

What is the breakdown voltage range for P4SMA22?

The P4SMA22 has a guaranteed breakdown voltage (V_BR) range of 19.8 V to 24.2 V at 1.0 mA test current, measured per ANSI/IEEE C62.35. This ±10% tolerance ensures predictable clamping onset across production lots and temperature extremes, directly supporting reliable overvoltage protection design for 18–24 V nominal systems.

Is P4SMA22 unidirectional or bidirectional?

The P4SMA22 is a unidirectional TVS diode, indicated by the absence of "C" or "CA" suffix and confirmed by its cathode-band marking and electrical specifications applying only in reverse bias. It must be oriented with cathode toward the protected line; for bidirectional protection, P4SMA22C would be required instead.

What is the maximum clamping voltage of P4SMA22 under surge conditions?

The P4SMA22 exhibits a maximum clamping voltage (V_C) of 31.9 V when subjected to a 10/1000 µs surge waveform with 13.0 A peak current. This value is measured per standard test conditions and represents the highest voltage that will appear across the protected circuit during worst-case transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.

Does P4SMA22 meet automotive transient standards?

Yes, the P4SMA22 meets ISO 7637-2 requirements for Pulses 1, 2a, 2b, 3a, and 3b - covering common automotive electrical disturbances including load dump, alternator ripple, and inductive switching transients. Its 400 W rating and fast response make it suitable for 12 V system protection in body control modules and infotainment power supplies.

What packaging and reel quantity is offered for P4SMA22?

P4SMA22 is supplied in DO-214AC (SMA) package on 7,500-unit tape-and-reel format, compliant with EIA-481 standards. The reel configuration supports high-speed pick-and-place assembly, and the device's MSL Level 1 rating eliminates bake requirements prior to reflow - streamlining manufacturing for Aetrix Electronics' production partners.

P4SMA22 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):: 17.8V

Voltage - Breakdown (Min):: 19.8V

Voltage - Clamping (Max) @ Ipp:: 31.9V

Current - Peak Pulse (10/1000µs):: 13A

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)

P4SMA22 FAQ

1.How can I place an order for P4SMA22 through Aetrix?

Please submit a Request for Quotation (RFQ) for P4SMA22 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 P4SMA22 reliable?

The price and inventory of P4SMA22 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA22 is usually 5 days.

3.What payment methods are accepted for P4SMA22?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA22 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for P4SMA22?

P4SMA22 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your P4SMA22 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 P4SMA22?

For technical support, including P4SMA22 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA22 requirements.

6.How does Aetrix verify that P4SMA22 is sourced from the original manufacturer or authorized distributors?

All P4SMA22 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 P4SMA22 meets industry standards.

7.What is the process for return or replacement of P4SMA22?

All P4SMA22 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA22, 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 P4SMA22 part is unused and in its original packaging.

Return procedure for P4SMA22:

1.Submit a request within 90 days.

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

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