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

Taiwan Semiconductor Corporation P4SMA16A

Name: P4SMA16A
Brand: Taiwan Semiconductor Corporation
SKU: P4SMA16A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: P4SMA16A

Manufacturer:: Taiwan Semiconductor Corporation

Category:: TVS Diodes

Package:: DO-214AC, SMA

Datasheet:: P4SMA16A.pdf

Description:: TVS DIODE 13.6VWM 22.5VC DO214AC

Quantity:: RFQ Add To RFQ list

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Inventory:3,652

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Product details

Overview

P4SMA16A 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 15.2–16.8 V breakdown voltage (V_BR), 13.6 V working stand-off voltage (V_WM), 22.5 V clamping voltage (V_C) at 18.6 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 P4SMA16A datasheet, P4SMA16A pinout, P4SMA16A application, or P4SMA16A equivalent, key selection criteria include its DO-214AC (SMA) package compatibility, low leakage (<1 µA at V_WM), fast sub-1 ps response, and ISO 7637-2 compliance for automotive transients.

Technical Context

The P4SMA16A operates as a unidirectional avalanche diode with glass-passivated junction, optimized for clamping transient surges before downstream ICs are damaged. Its 15.2–16.8 V V_BR range ensures precise triggering above nominal 13.6 V system rail, while 22.5 V V_C limits stress on protected circuitry during 18.6 A 10/1000 µs pulses.

It meets JESD201 Class 2 whisker resistance, UL 94V-0 molding compound, and moisture sensitivity level 1 per J-STD-020 - enabling robust automated assembly and long-term reliability in industrial and automotive environments without derating below 150 °C junction temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
V_BR @ I_T=1 mA	15.2–16.8 V - defines minimum and maximum voltage at which avalanche conduction begins; sets overvoltage trip threshold
V_WM	13.6 V - maximum continuous reverse operating voltage; must exceed system nominal rail to avoid leakage-induced power loss
V_C @ I_PPM=18.6 A	22.5 V - clamped voltage during 10/1000 µs surge; determines maximum stress on protected load
I_R @ V_WM	<1 µA - ultra-low reverse leakage ensures minimal standby current drain in battery-powered systems
P_PPM	400 W - peak pulse power handling capability under standardized 10/1000 µs waveform per IEC 61000-4-5
T_J max	+150 °C - maximum junction temperature; supports operation in high-ambient industrial and under-hood automotive locations
Package	DO-214AC (SMA) - industry-standard surface-mount outline with cathode band marking; compatible with standard reflow profiles

Pinout & Package

DO-214AC (SMA) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band. Weight ≈ 0.060 g. Meets J-STD-002 solderability and JESD201 Class 2 whisker resistance.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal	Connected to lower-potential side (e.g., GND or return path); conducts during forward surge or ESD events
Cathode	Reverse-biased clamping terminal	Connected to protected line (e.g., +12 V rail); avalanches into conduction 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 exposure
Sub-1 ps response time	Clamps transients before sensitive logic or power ICs experience damaging overvoltage
ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance	Validated for automotive load-dump and supply-line transient immunity per OEM requirements
RoHS & halogen-free	Meets IEC 61249-2-21 and EU RoHS directives for environmentally constrained production

Applications

Switching Mode Power Supply (SMPS)	On-Board DC/DC Converter
Use Scenario: Protects primary-side controller ICs and secondary-side rectifiers from input line surges and transformer leakage spikes. IC Role / Device Role: Unidirectional TVS placed across input capacitor or across MOSFET drain-source to clamp inductive kickback. Use Value: Limits transient voltage to ≤22.5 V during 400 W surges, preventing gate oxide rupture or latch-up in PWM controllers.	Use Scenario: Shields point-of-load regulators and microcontroller power rails in automotive body control modules. IC Role / Device Role: Mounted at DC/DC input to absorb load-dump energy per ISO 7637-2 Pulse 5a. Use Value: Withstands 18.6 A peak current at 13.6 V stand-off, maintaining system uptime during battery-reconnection events.
Lighting Application	Adapters
Use Scenario: Safeguards LED driver ICs and MOSFETs in automotive headlamp and interior lighting modules. IC Role / Device Role: Placed across LED string or driver output to suppress back-EMF from inductive ballasts. Use Value: Clamps 10/1000 µs transients to 22.5 V while drawing <1 µA leakage at 13.6 V - preserving dimming accuracy and efficiency.	Use Scenario: Guards AC-DC adapter secondary-side outputs against surge coupling and ESD during plug insertion. IC Role / Device Role: Connected between V_OUT and GND to limit overvoltage during open-circuit or short-circuit transients. Use Value: Enables compact DO-214AC footprint without sacrificing 400 W pulse rating - critical for space-constrained wall adapters.

Switching Mode Power Supply (SMPS)

On-Board DC/DC Converter

Use Scenario: Protects primary-side controller ICs and secondary-side rectifiers from input line surges and transformer leakage spikes.

IC Role / Device Role: Unidirectional TVS placed across input capacitor or across MOSFET drain-source to clamp inductive kickback.

Use Value: Limits transient voltage to ≤22.5 V during 400 W surges, preventing gate oxide rupture or latch-up in PWM controllers.

Use Scenario: Shields point-of-load regulators and microcontroller power rails in automotive body control modules.

IC Role / Device Role: Mounted at DC/DC input to absorb load-dump energy per ISO 7637-2 Pulse 5a.

Use Value: Withstands 18.6 A peak current at 13.6 V stand-off, maintaining system uptime during battery-reconnection events.

Lighting Application

Adapters

Use Scenario: Safeguards LED driver ICs and MOSFETs in automotive headlamp and interior lighting modules.

IC Role / Device Role: Placed across LED string or driver output to suppress back-EMF from inductive ballasts.

Use Value: Clamps 10/1000 µs transients to 22.5 V while drawing <1 µA leakage at 13.6 V - preserving dimming accuracy and efficiency.

Use Scenario: Guards AC-DC adapter secondary-side outputs against surge coupling and ESD during plug insertion.

IC Role / Device Role: Connected between V_OUT and GND to limit overvoltage during open-circuit or short-circuit transients.

Use Value: Enables compact DO-214AC footprint without sacrificing 400 W pulse rating - critical for space-constrained wall adapters.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ16A (Bourns)	Same DO-214AA package; 15.2–16.8 V V_BR, 23.0 V V_C @ 17.4 A; 600 W rating	Higher power rating suits higher-energy surge environments; slightly larger package footprint	Select SMBJ16A when system-level surge testing requires >400 W margin or when board layout allows DO-214AA
1.5SMC16A (ON Semiconductor)	DO-214AB package; 15.2–16.8 V V_BR, 23.2 V V_C @ 17.2 A; 1500 W rating	Designed for higher-power industrial equipment; not drop-in due to larger body and lead spacing	Choose 1.5SMC16A only if PCB pad layout is revised for DO-214AB and surge energy exceeds 400 W

Compared with SMBJ16A and 1.5SMC16A, the P4SMA16A offers optimal balance of 400 W surge capability, DO-214AC footprint compatibility, and low-leakage performance - making it ideal for cost-sensitive, space-constrained consumer and automotive auxiliary power designs where exact 400 W rating suffices.

Availability

P4SMA16A 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 P4SMA16A 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, automotive, and consumer markets.

The P4SMA16A belongs to TSC's P4SMAx series of 400 W surface-mount TVS diodes - engineered specifically for reliable, high-volume surge protection in compact power conversion and automotive subsystems.

FAQ

What is the breakdown voltage range of the P4SMA16A?

The P4SMA16A has a specified breakdown voltage (V_BR) range of 15.2 V to 16.8 V at 1.0 mA test current, measured per ANSI/IEEE C62.35. This tight tolerance ensures consistent clamping behavior across production lots and supports precise overvoltage threshold design in 12 V and 13.6 V nominal systems.

Is the P4SMA16A unidirectional or bidirectional?

The P4SMA16A is a unidirectional TVS diode, indicated by the absence of "C" or "CA" suffix. It conducts in forward bias like a standard diode and clamps reverse transients above its V_BR; polarity is marked by a cathode band on the DO-214AC package body.

What is the maximum clamping voltage of the P4SMA16A during a surge event?

The P4SMA16A exhibits a maximum clamping voltage (V_C) of 22.5 V when subjected to its rated 18.6 A peak pulse current under the standard 10/1000 µs waveform. This value is guaranteed per datasheet test conditions and defines the upper voltage limit imposed on protected circuitry during surge events.

Does the P4SMA16A meet automotive transient standards?

Yes, the P4SMA16A meets ISO 7637-2 requirements for Pulse 1, 2a, 2b, 3a, and 3b - covering typical automotive electrical disturbances including load dump, supply interruption, and coupled transients. Its 400 W rating and 13.6 V V_WM make it suitable for 12 V vehicle subsystems.

What packaging and reel quantity is offered for the P4SMA16A?

The P4SMA16A is supplied in DO-214AC (SMA) package format on tape-and-reel, with 7,500 units per reel. The package features matte tin-plated leads compliant with J-STD-002 and is rated moisture sensitivity level 1 per J-STD-020 - enabling standard SMT assembly without baking.

P4SMA16A 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):: 13.6V

Voltage - Breakdown (Min):: 15.2V

Voltage - Clamping (Max) @ Ipp:: 22.5V

Current - Peak Pulse (10/1000µs):: 18.6A

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)

P4SMA16A FAQ

1.How can I place an order for P4SMA16A through Aetrix?

Please submit a Request for Quotation (RFQ) for P4SMA16A 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 P4SMA16A reliable?

The price and inventory of P4SMA16A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA16A is usually 5 days.

3.What payment methods are accepted for P4SMA16A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA16A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for P4SMA16A?

P4SMA16A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your P4SMA16A 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 P4SMA16A?

For technical support, including P4SMA16A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA16A requirements.

6.How does Aetrix verify that P4SMA16A is sourced from the original manufacturer or authorized distributors?

All P4SMA16A 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 P4SMA16A meets industry standards.

7.What is the process for return or replacement of P4SMA16A?

All P4SMA16A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA16A, 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 P4SMA16A part is unused and in its original packaging.

Return procedure for P4SMA16A:

1.Submit a request within 90 days.

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

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