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

Taiwan Semiconductor Corporation P4SMA22A

Name: P4SMA22A
Brand: Taiwan Semiconductor Corporation
SKU: P4SMA22A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: P4SMA22A

Manufacturer:: Taiwan Semiconductor Corporation

Category:: TVS Diodes

Package:: DO-214AC, SMA

Datasheet:: P4SMA22A.pdf

Description:: TVS DIODE 18.8VWM 30.6VC DO214AC

Quantity:: RFQ Add To RFQ list

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Inventory:6,186

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Product details

Overview

P4SMA22A 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 20.9–23.1 V breakdown voltage (V_BR), 18.8 V working stand-off voltage (V_WM), 30.6 V clamping voltage (V_C) at 13.7 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 P4SMA22A datasheet, P4SMA22A pinout, P4SMA22A application, or P4SMA22A equivalent, key selection criteria include its DO-214AC (SMA) package compatibility, unidirectional polarity marking, sub-1 ps response time, <1 µA reverse leakage at V_WM, and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance for automotive and industrial surge immunity.

Technical Context

The P4SMA22A operates as a unidirectional avalanche diode with glass-passivated junction, optimized for fast clamping of transient surges without latch-up. Its electrical behavior follows IEEE C62.35 standards, with breakdown tested at 1.0 mA and clamping characterized at t_p = 10/1000 µs waveform per REA definition.

Thermal derating begins above 25°C ambient, with maximum junction temperature rated at +150°C and storage range from –55°C to +150°C. The device exhibits a temperature coefficient of V_BR of 0.092 %/°C and meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1.

Key Specifications

Parameter	Value and Actual Design Meaning
V_BR @ I_T = 1.0 mA	20.9–23.1 V - defines minimum and maximum avalanche initiation threshold under standardized test current
V_WM	18.8 V - maximum continuous reverse operating voltage before significant leakage onset
V_C @ I_PPM = 13.7 A	30.6 V - clamped voltage during 400 W transient, limiting downstream circuit stress
I_R @ V_WM	<1 µA - ensures minimal standby power loss and signal integrity in high-impedance circuits
P_PPM	400 W - peak pulse power handling capability under standard 10/1000 µs surge waveform
Response Time	<1.0 ps - enables suppression of ESD and fast transients before sensitive ICs react
T_J max	+150°C - supports operation in thermally demanding environments including under-hood automotive

Pinout & Package

Package: DO-214AC (SMA), surface-mount, unidirectional configuration with cathode band marking. Matte tin-plated leads, UL 94V-0 molding compound, 0.060 g typical weight.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal	Connected to lower-potential side (e.g., GND or return path) in unidirectional TVS placement
Cathode	Avalanche clamping terminal	Marked by band; connected to protected line (e.g., V_IN, signal rail) to shunt surge to ground

Key Features

Feature	Design Value
Glass passivated junction	Ensures stable V_BR tolerance and long-term reliability under thermal cycling and humidity
ISO 7637-2 compliance	Validated for automotive load-dump and supply transients (Pulse 1, 2a, 2b, 3a, 3b)
Moisture Sensitivity Level 1	Enables standard SMT reflow without baking or special handling per J-STD-020
RoHS & halogen-free	Meets IEC 61249-2-21 and EU RoHS Directive for environmentally constrained designs
Fast response & low clamping	<1 ps reaction plus 30.6 V clamp at 13.7 A enables protection of 3.3 V/5 V logic and power rails

Applications

Switching Mode Power Supply (SMPS)	On-board DC/DC Converter
Use Scenario: Input stage surge protection against line transients and inductive kickback in AC/DC adapters and offline SMPS. IC Role / Device Role: Unidirectional TVS placed between input rectifier output and bulk capacitor to clamp positive-going spikes. Use Value: Limits voltage excursion to ≤30.6 V during 400 W transients, preventing MOSFET gate oxide rupture and controller latch-up.	Use Scenario: Protection of 12 V-to-3.3 V buck converter inputs in automotive body control modules. IC Role / Device Role: Standoff-rated TVS absorbing ISO 7637-2 Pulse 2b (battery disconnect) and Pulse 3b (capacitive discharge). Use Value: Maintains V_WM = 18.8 V margin above nominal 12 V rail while clamping to 30.6 V - within safe operating area of downstream PMIC.
Lighting Application	Adapters
Use Scenario: Overvoltage suppression on LED driver input in commercial LED troffers exposed to building wiring surges. IC Role / Device Role: Primary-side TVS on constant-current driver input, mounted adjacent to EMI filter. Use Value: Withstands repeated 10/1000 µs surges up to 400 W without degradation, preserving lumen maintenance and driver lifetime.	Use Scenario: Secondary-side transient protection in universal-input wall adapters for consumer electronics. IC Role / Device Role: Unidirectional TVS across 5 V USB output to prevent ESD-induced reset or port damage. Use Value: Sub-1 µA leakage at 5 V ensures no impact on no-load efficiency; 30.6 V clamp protects connected devices during hot-plug events.

Switching Mode Power Supply (SMPS)

On-board DC/DC Converter

Use Scenario: Input stage surge protection against line transients and inductive kickback in AC/DC adapters and offline SMPS.

IC Role / Device Role: Unidirectional TVS placed between input rectifier output and bulk capacitor to clamp positive-going spikes.

Use Value: Limits voltage excursion to ≤30.6 V during 400 W transients, preventing MOSFET gate oxide rupture and controller latch-up.

Use Scenario: Protection of 12 V-to-3.3 V buck converter inputs in automotive body control modules.

IC Role / Device Role: Standoff-rated TVS absorbing ISO 7637-2 Pulse 2b (battery disconnect) and Pulse 3b (capacitive discharge).

Use Value: Maintains V_WM = 18.8 V margin above nominal 12 V rail while clamping to 30.6 V - within safe operating area of downstream PMIC.

Lighting Application

Adapters

Use Scenario: Overvoltage suppression on LED driver input in commercial LED troffers exposed to building wiring surges.

IC Role / Device Role: Primary-side TVS on constant-current driver input, mounted adjacent to EMI filter.

Use Value: Withstands repeated 10/1000 µs surges up to 400 W without degradation, preserving lumen maintenance and driver lifetime.

Use Scenario: Secondary-side transient protection in universal-input wall adapters for consumer electronics.

IC Role / Device Role: Unidirectional TVS across 5 V USB output to prevent ESD-induced reset or port damage.

Use Value: Sub-1 µA leakage at 5 V ensures no impact on no-load efficiency; 30.6 V clamp protects connected devices during hot-plug events.

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 (Bourns)	Same DO-214AA (SMB) package; 22 V V_BR min/max 20.9–23.1 V; identical V_C = 30.6 V but rated at 600 W	Larger footprint (SMB vs SMA); higher power rating suits higher-energy surge environments	Select SMBJ22A when board space allows and system-level surge testing exceeds IEC 61000-4-5 Level 4
1.5SMC22A (ON Semiconductor)	DO-214AB (SMC) package; same V_BR range and V_C; 1500 W rating; higher I_PPM = 49.2 A	Significantly larger SMC outline; intended for primary-side AC-line or high-power DC bus protection	Choose 1.5SMC22A only when PCB layout accommodates 7.11 × 6.22 mm footprint and surge energy exceeds 400 W

Compared with SMBJ22A and 1.5SMC22A, the P4SMA22A offers optimal balance of compact DO-214AC (SMA) size, precise 18.8 V standoff, and proven 400 W capability - making it ideal for space-constrained secondary-side and low-to-medium energy protection where footprint and cost are critical.

Availability

P4SMA22A is available at Aetrix Electronics and suitable for switching mode power supplies, on-board DC/DC converters, and lighting applications requiring stable component supply, full traceability, and long-term lifecycle support.

Supply support for P4SMA22A 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global industrial, automotive, and consumer markets since 1979.

The P4SMA22A belongs to TSC's P4SMAx series of surface-mount TVS diodes - engineered specifically for high-reliability, automated assembly in power conversion and automotive subsystems where robustness, consistency, and JEDEC-compliant packaging are mandatory.

FAQ

What is the polarity configuration of the P4SMA22A?

The P4SMA22A is a unidirectional TVS diode, with cathode indicated by a band on the DO-214AC (SMA) package. It conducts only during reverse-biased overvoltage events, clamping positive transients on the cathode side to ground. This configuration matches standard DC rail protection layouts and differs from bidirectional variants like P4SMA22CA.

Does the P4SMA22A meet automotive surge immunity standards?

Yes, the P4SMA22A meets ISO 7637-2 requirements for Pulse 1 (inductive load dump), Pulse 2a (sudden load removal), Pulse 2b (supply interruption), Pulse 3a (capacitive coupled), and Pulse 3b (inductive coupled). Its 30.6 V clamping voltage at 13.7 A and 400 W rating make it suitable for 12 V automotive subsystems such as body control modules and lighting drivers.

What is the maximum junction temperature rating for the P4SMA22A?

The P4SMA22A has a maximum junction temperature (T_J) rating of +150°C, with an operating junction temperature range of –55°C to +150°C. This allows reliable operation in under-hood automotive environments and enclosed industrial power supplies where ambient temperatures exceed 100°C, provided PCB copper area and airflow meet thermal derating curves in Figure 2 of the datasheet.

How does the P4SMA22A compare to the P4SMA22 (non-A) variant?

The P4SMA22A has tighter V_BR tolerance (20.9–23.1 V) versus P4SMA22 (19.8–24.2 V), resulting in more consistent clamping behavior and improved margin control in precision protection designs. Both share identical V_WM = 18.8 V, V_C = 30.6 V, and 400 W rating, but the 'A' suffix denotes enhanced binning for critical applications where V_BR spread must be minimized.

Is the P4SMA22A compatible with lead-free reflow soldering processes?

Yes, the P4SMA22A is qualified for lead-free reflow per J-STD-020, with Moisture Sensitivity Level 1 - meaning it can be stored indefinitely at ≤30°C/60% RH and processed using standard Pb-free profiles (peak ≤260°C) without preconditioning or baking. Its matte tin-plated leads ensure solderability per J-STD-002.

P4SMA22A 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):: 18.8V

Voltage - Breakdown (Min):: 20.9V

Voltage - Clamping (Max) @ Ipp:: 30.6V

Current - Peak Pulse (10/1000µs):: 13.7A

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)

P4SMA22A FAQ

1.How can I place an order for P4SMA22A through Aetrix?

Please submit a Request for Quotation (RFQ) for P4SMA22A 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 P4SMA22A reliable?

The price and inventory of P4SMA22A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA22A is usually 5 days.

3.What payment methods are accepted for P4SMA22A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA22A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for P4SMA22A?

P4SMA22A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your P4SMA22A 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 P4SMA22A?

For technical support, including P4SMA22A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA22A requirements.

6.How does Aetrix verify that P4SMA22A is sourced from the original manufacturer or authorized distributors?

All P4SMA22A 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 P4SMA22A meets industry standards.

7.What is the process for return or replacement of P4SMA22A?

All P4SMA22A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA22A, 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 P4SMA22A part is unused and in its original packaging.

Return procedure for P4SMA22A:

1.Submit a request within 90 days.

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

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