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

Taiwan Semiconductor Corporation P4SMA24A

Name: P4SMA24A
Brand: Taiwan Semiconductor Corporation
SKU: P4SMA24A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: P4SMA24A

Manufacturer:: Taiwan Semiconductor Corporation

Category:: TVS Diodes

Package:: DO-214AC, SMA

Datasheet:: P4SMA24A.pdf

Description:: TVS DIODE 20.5VWM 33.2VC DO214AC

Quantity:: RFQ Add To RFQ list

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Inventory:3,351

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Product details

Overview

P4SMA24A 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 20.5 V working stand-off voltage, 22.8–25.2 V breakdown voltage at 1 mA, 33.2 V clamping voltage at 12.6 A (10/1000 µs), and 400 W peak pulse power dissipation - deployed in switching mode power supplies and on-board DC/DC converters.

For engineers reviewing the P4SMA24A datasheet, P4SMA24A pinout, P4SMA24A application, or P4SMA24A equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, junction temperature derating above 25°C, DO-214AC (SMA) package compatibility with automated placement, and unidirectional polarity marking for correct PCB orientation.

Technical Context

The P4SMA24A operates as a unidirectional avalanche diode with glass-passivated junction, optimized for fast response (<1.0 ps) to transient surges. Its electrical behavior follows IEEE C62.35 standards, with breakdown measured after 300 µs square-wave IT pulse and clamping defined per 10/1000 µs waveform per REA.

It delivers stable protection across -55°C to +150°C operating junction range, with <1 µA reverse leakage at 20.5 V and maximum forward voltage of 3.5 V at 25 A. Thermal derating begins above 25°C ambient per Fig.2, and moisture sensitivity is rated J-STD-020 Level 1.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	20.5 V - Maximum continuous reverse voltage before significant leakage; sets system operating margin.
V_BR min/max	22.8–25.2 V @ 1 mA - Confirmed avalanche onset range; ensures reliable turn-on during transients.
V_C @ I_PPM	33.2 V @ 12.6 A (10/1000 µs) - Clamped voltage seen by protected circuit; defines worst-case stress level.
P_PPM	400 W - Peak surge power handling capability; validates compliance with ISO 7637-2 Pulse 3b.
I_R @ V_WM	<1 µA - Ultra-low leakage preserves efficiency in high-impedance bias networks.
T_J max	+150°C - Enables use in thermally constrained environments like enclosed power adapters.

Pinout & Package

Package: DO-214AC (SMA), surface-mount, single-die unidirectional configuration with cathode band marking. Matte tin-plated leads meet J-STD-002 solderability; weight ≈ 0.060 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry / transient return path	Connected to protected line's low-side or ground reference; must route with minimal inductance.
Cathode	Reverse-biased terminal / clamping node	Connected to protected line's high-side; polarity mark aligns with PCB silkscreen for error-proof assembly.

Key Features

Feature	Design Value
Glass passivated junction	Ensures long-term reliability and stable V_BR under thermal cycling and humidity exposure.
Fast response time <1.0 ps	Clamps ESD and fast-edge transients before downstream ICs experience overstress.
Meets ISO 7637-2 Pulse 1/2a/2b/3a/3b	Validated for automotive-level load dump and inductive switching immunity without external filtering.
RoHS & halogen-free (IEC 61249-2-21)	Complies with global environmental regulations and enables use in consumer and industrial end-equipment.

Applications

Switching Mode Power Supply (SMPS)	On-board DC/DC Converter
Use Scenario: Protection of primary-side MOSFET gate drivers and secondary-side rectifier inputs against flyback spikes and cross-talk. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed across input/output rails to limit transient overshoot. Use Value: Prevents gate oxide damage in 650 V Si MOSFETs and maintains regulation stability during 400 W surge events.	Use Scenario: Safeguarding point-of-load (POL) regulators in FPGA or ASIC power domains from board-level coupling noise. IC Role / Device Role / Timing Role: Standoff-clamp protector on 3.3 V or 5 V distribution nets upstream of LDOs or buck controllers. Use Value: Limits voltage excursions to ≤33.2 V during 12.6 A pulses, preserving regulator enable thresholds and feedback integrity.
Lighting Application	Adapters
Use Scenario: Overvoltage suppression in LED driver input stages exposed to mains transients and dimmer-induced ringing. IC Role / Device Role / Timing Role: Primary-side rail clamp on constant-current LED modules with AC/DC front-end. Use Value: Absorbs 400 W surges while maintaining <1 µA leakage to avoid standby power penalty in Energy Star-compliant fixtures.	Use Scenario: Input-stage protection in wall-mounted AC/DC adapters subject to lightning-induced surges and hot-plug events. IC Role / Device Role / Timing Role: First-line defense on secondary-side DC output before USB-PD or legacy 5 V/12 V connectors. Use Value: Enables UL/EN 62368-1 compliance with no additional MOV or GDT staging required due to 33.2 V clamping ceiling.

Switching Mode Power Supply (SMPS)

On-board DC/DC Converter

Use Scenario: Protection of primary-side MOSFET gate drivers and secondary-side rectifier inputs against flyback spikes and cross-talk.

IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed across input/output rails to limit transient overshoot.

Use Value: Prevents gate oxide damage in 650 V Si MOSFETs and maintains regulation stability during 400 W surge events.

Use Scenario: Safeguarding point-of-load (POL) regulators in FPGA or ASIC power domains from board-level coupling noise.

IC Role / Device Role / Timing Role: Standoff-clamp protector on 3.3 V or 5 V distribution nets upstream of LDOs or buck controllers.

Use Value: Limits voltage excursions to ≤33.2 V during 12.6 A pulses, preserving regulator enable thresholds and feedback integrity.

Lighting Application

Adapters

Use Scenario: Overvoltage suppression in LED driver input stages exposed to mains transients and dimmer-induced ringing.

IC Role / Device Role / Timing Role: Primary-side rail clamp on constant-current LED modules with AC/DC front-end.

Use Value: Absorbs 400 W surges while maintaining <1 µA leakage to avoid standby power penalty in Energy Star-compliant fixtures.

Use Scenario: Input-stage protection in wall-mounted AC/DC adapters subject to lightning-induced surges and hot-plug events.

IC Role / Device Role / Timing Role: First-line defense on secondary-side DC output before USB-PD or legacy 5 V/12 V connectors.

Use Value: Enables UL/EN 62368-1 compliance with no additional MOV or GDT staging required due to 33.2 V clamping ceiling.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ24A (Bourns)	Same DO-214AA package; 33.2 V clamping at 12.7 A; 600 W rating; higher I_PPM capability.	Preferred where higher surge margin is needed (e.g., industrial motor drives); larger footprint than SMA.	Select SMBJ24A only if layout allows DO-214AA and system requires >400 W headroom.
1.5SMC24A (ON Semiconductor)	DO-214AB package; 33.2 V clamping at 12.6 A; identical electrical specs but 1.5 kW rating; heavier leadframe.	Used in high-reliability telecom power; not suitable for space-constrained adapter PCBs.	Choose 1.5SMC24A only when mechanical robustness outweighs size constraints and thermal mass is beneficial.

Compared with SMBJ24A and 1.5SMC24A, the P4SMA24A offers optimal balance of compact DO-214AC footprint, automated placement compatibility, and precise 33.2 V clamping - making it ideal for cost-sensitive, high-volume adapter and lighting designs where board area is constrained.

Availability

P4SMA24A 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 P4SMA24A 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, and rectifiers with global distribution and AEC-Q200 qualified product lines.

The P4SMA24A belongs to TSC's P4SMAx series of surface-mount TVS diodes engineered for high-reliability overvoltage protection in automotive, industrial, and consumer power systems - emphasizing low leakage, tight V_BR tolerance, and ISO 7637-2 compliance.

FAQ

What is the clamping voltage of the P4SMA24A under standard test conditions?

The P4SMA24A has a maximum clamping voltage (V_C) of 33.2 V when subjected to a 10/1000 µs impulse current of 12.6 A. This value is measured per REA-defined waveform and represents the peak voltage seen by protected circuitry during surge events - critical for ensuring downstream components remain within absolute maximum ratings. The P4SMA24A maintains this clamping performance across its full operating temperature range.

Is the P4SMA24A suitable for bidirectional transient protection?

No, the P4SMA24A is a unidirectional TVS diode intended for DC line protection with defined anode-cathode polarity. For bidirectional applications such as AC signal lines or data buses, the P4SMA24CA variant (with CA suffix) must be used instead. The P4SMA24A's cathode band marking and forward voltage specification (3.5 V at 25 A) confirm its unidirectional design - using it in reverse-biased AC contexts risks failure.

What is the maximum operating junction temperature for the P4SMA24A?

The P4SMA24A has a maximum operating junction temperature (T_J) of +150°C, with a storage temperature range of -55°C to +150°C. Derating of peak pulse power begins above 25°C ambient per the manufacturer's Fig.2 curve, and thermal design must account for PCB copper area and airflow. This T_J rating enables deployment in enclosed power adapters and LED drivers where internal temperatures exceed 100°C.

Does the P4SMA24A meet automotive transient immunity standards?

Yes, the P4SMA24A meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a/2b (battery feed interruption), and Pulse 3a/3b (capacitive coupled noise), making it suitable for 12 V automotive subsystems including body control modules and infotainment power rails. Its 400 W rating and sub-1 ps response ensure compliance without supplemental filtering - though system-level validation per ISO 16750-2 remains required.

What packaging and reel quantity is available for the P4SMA24A?

The P4SMA24A is supplied in DO-214AC (SMA) package format on 7,500-piece tape-and-reel. The reels comply with EIA-481-D standards, and the matte tin-plated leads meet J-STD-002 solderability requirements. Each reel includes date code (YW), factory code (F), and green compound (G) identification per TSC's marking diagram - supporting full traceability for high-volume manufacturing and IPC-A-610 Class 2/3 assembly.

P4SMA24A 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):: 20.5V

Voltage - Breakdown (Min):: 22.8V

Voltage - Clamping (Max) @ Ipp:: 33.2V

Current - Peak Pulse (10/1000µs):: 12.6A

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)

P4SMA24A FAQ

1.How can I place an order for P4SMA24A through Aetrix?

Please submit a Request for Quotation (RFQ) for P4SMA24A 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 P4SMA24A reliable?

The price and inventory of P4SMA24A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA24A is usually 5 days.

3.What payment methods are accepted for P4SMA24A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA24A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for P4SMA24A?

P4SMA24A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your P4SMA24A 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 P4SMA24A?

For technical support, including P4SMA24A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA24A requirements.

6.How does Aetrix verify that P4SMA24A is sourced from the original manufacturer or authorized distributors?

All P4SMA24A 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 P4SMA24A meets industry standards.

7.What is the process for return or replacement of P4SMA24A?

All P4SMA24A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA24A, 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 P4SMA24A part is unused and in its original packaging.

Return procedure for P4SMA24A:

1.Submit a request within 90 days.

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

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