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Taiwan Semiconductor Corporation P4SMA24CA
- Part No.:
- P4SMA24CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA24CA.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,628
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Product details
Overview
P4SMA24CA from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power, 22.8V–25.2V breakdown voltage (VBR), and 20.5V working stand-off voltage (VWM), used to protect DC/DC converters and automotive power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the P4SMA24CA datasheet, P4SMA24CA pinout, P4SMA24CA application, or P4SMA24CA equivalent, key selection criteria include clamping voltage (33.2V @ 12.6A), low leakage (<1µA @ 20.5V), fast response (<1.0ps), bidirectional surge capability, and compliance with J-STD-020 Level 1 moisture sensitivity.
Technical Context
The P4SMA24CA implements a glass-passivated silicon junction optimized for bidirectional transient suppression in automotive and industrial power systems. It delivers symmetrical clamping behavior in both polarities, with a maximum clamping voltage of 33.2V at 12.6A (10/1000μs waveform) and a temperature coefficient of VBR at 0.094%/°C.
Its DO-214AC (SMA) package supports automated placement and meets UL 94V-0 flammability rating, JESD 201 Class 2 whisker resistance, and RoHS/halogen-free requirements per IEC 61249-2-21 - enabling reliable use in high-reliability board-level ESD and surge protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20.5 V - Maximum continuous reverse operating voltage before significant leakage begins; sets safe DC bias margin for protected line. |
| VBR min/max | 22.8 V / 25.2 V @ 1.0 mA - Confirmed breakdown range ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 33.2 V @ 12.6 A (10/1000μs) - Clamping voltage defines worst-case voltage seen by downstream circuitry during surge. |
| IR @ VWM | <1 µA - Ultra-low leakage preserves efficiency in battery-powered or high-impedance sensing circuits. |
| PPPM | 400 W - Peak pulse power rating determines survivability under standardized surge waveforms like ISO 7637-2. |
| TJ max | +150 °C - Maximum junction temperature enables operation in under-hood automotive environments. |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking; dual-terminal configuration (anode/cathode), polarity-sensitive for unidirectional variants but symmetrically bidirectional for P4SMA24CA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Accepts reverse surge current during negative transients; forms symmetrical clamping path with cathode. |
| Cathode | Transient current entry (positive polarity) | Accepts forward surge current during positive transients; completes bidirectional clamping loop. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Electrical characteristics identical in both directions - eliminates need for polarity-aware layout in DC bus protection. |
| Fast response time | <1.0 ps - Enables suppression before sensitive ICs experience damaging overvoltage stress. |
| ISO 7637-2 compliance | Validated for Pulse 1, 2a, 2b, 3a, 3b - meets automotive OEM requirements for load dump and inductive switching immunity. |
| Moisture sensitivity level | J-STD-020 Level 1 - No floor life limitation or bake requirement prior to reflow soldering. |
Applications
| Automotive Power Rail Protection | Industrial DC/DC Converter Input |
|---|---|
Use Scenario: Protecting 24V vehicle battery lines from load dump and alternator transients. IC Role / Device Role / Timing Role: Bidirectional TVS diode placed across input terminals to clamp surges before they reach DC/DC controller ICs. Use Value: Limits peak voltage to ≤33.2V during 12.6A ISO 7637-2 Pulse 2b, preventing MOSFET gate oxide damage and regulator latch-up. | Use Scenario: Safeguarding isolated 24V-to-5V DC/DC modules in programmable logic controllers. IC Role / Device Role / Timing Role: Primary surge shunt on primary-side input, coordinated with upstream fuse and common-mode choke. Use Value: Withstands repetitive 400W pulses without degradation, maintaining long-term reliability in factory automation environments. |
| LED Driver Power Stage | Telecom Power Supply Input |
Use Scenario: Shielding constant-current LED driver ICs from inductive kickback in streetlight ballasts. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing flyback energy from boost inductor during switch-off. Use Value: 33.2V clamping ensures LED string voltage stays within safe operating area of driver FETs and sense resistors. | Use Scenario: Front-end protection for 48V telecom rectifier outputs feeding distributed power architecture. IC Role / Device Role / Timing Role: First-line defense against lightning-induced surges entering via backplane or cable harnesses. Use Value: 400W rating and <1µA leakage support high-efficiency, low-maintenance telecom infrastructure with minimal standby loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA | 600W peak power, DO-214AA (SMB) package, higher IPPM (17.3A), same VWM/VC specs | Better suited for higher-energy surges; larger footprint requires PCB redesign | Select when system-level testing shows >400W surge exposure or when thermal derating margin is critical |
| 1.5SMC24CA | 1500W peak power, DO-214AB (SMC) package, VC = 38.9V @ 38.8A, higher leakage (≤5µA) | Designed for heavy-duty industrial mains input stages; over-spec for low-voltage DC rails | Choose only if legacy board space allows SMC footprint and clamping voltage margin permits 38.9V excursion |
Compared with SMBJ24CA and 1.5SMC24CA, the P4SMA24CA offers optimal balance of compact DO-214AC size, 400W capability, and tight 33.2V clamping - making it ideal for space-constrained 24V automotive and embedded power inputs where precise voltage limiting is critical.
Availability
P4SMA24CA is available at Aetrix Electronics and suitable for automotive power rail protection, industrial DC/DC converter input stages, and LED driver power stage applications requiring stable component supply and full traceability.
Supply support for P4SMA24CA 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 Company (TSC) is a vertically integrated Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and consumer markets.
The P4SMA series belongs to TSC's surface-mount TVS portfolio designed specifically for robust, cost-effective transient protection in space-constrained 12V/24V/48V power systems compliant with ISO 7637-2 and AEC-Q101 stress requirements.
FAQ
What is the clamping voltage of the P4SMA24CA under standard surge conditions?
The P4SMA24CA has a maximum clamping voltage (VC) of 33.2 V when subjected to a 10/1000 μs waveform with a peak impulse current (IPPM) of 12.6 A. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream components remain within their absolute maximum ratings. The P4SMA24CA maintains this clamping performance across its full operating temperature range.
Is the P4SMA24CA suitable for automotive applications requiring ISO 7637-2 compliance?
Yes, the P4SMA24CA is explicitly rated to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements. Its 400W peak pulse power rating, bidirectional symmetry, and 33.2V clamping voltage enable effective suppression of load dump, jump-start, and inductive switching transients found in 12V/24V vehicle electrical systems. The P4SMA24CA is widely deployed in body control modules, infotainment power supplies, and ADAS sensor interfaces.
What does the "CA" suffix indicate in P4SMA24CA?
The "CA" suffix in P4SMA24CA denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional "A" variants (e.g., P4SMA24A), the CA version has no polarity marking requirement and functions identically regardless of terminal orientation. This simplifies layout and eliminates risk of incorrect placement during automated assembly of the P4SMA24CA.
What is the maximum reverse leakage current for the P4SMA24CA at its working voltage?
The P4SMA24CA exhibits a maximum reverse leakage current (IR) of 1 µA when biased at its working stand-off voltage (VWM) of 20.5 V and tested at 25°C. This ultra-low leakage ensures minimal power loss in always-on systems such as automotive telematics or industrial sensors, and avoids false triggering in high-impedance monitoring circuits. The P4SMA24CA maintains leakage below 5 µA even at elevated temperatures up to +125°C.
Does the P4SMA24CA require special handling or baking before reflow soldering?
No, the P4SMA24CA is rated at J-STD-020 Moisture Sensitivity Level 1, meaning it has unlimited floor life and does not require dry-packaging, humidity indicator cards, or pre-reflow baking. It can be mounted directly from tape-and-reel using standard lead-free reflow profiles. This simplifies manufacturing logistics and reduces process risk - a key advantage of the P4SMA24CA in high-volume automotive and industrial production.
P4SMA24CA 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:
- -
- Bidirectional Channels:
- 1
- 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)
P4SMA24CA FAQ
1.How can I place an order for P4SMA24CA through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA24CA 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 P4SMA24CA reliable?
The price and inventory of P4SMA24CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA24CA is usually 5 days.
3.What payment methods are accepted for P4SMA24CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA24CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA24CA?
P4SMA24CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA24CA 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 P4SMA24CA?
For technical support, including P4SMA24CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA24CA requirements.
6.How does Aetrix verify that P4SMA24CA is sourced from the original manufacturer or authorized distributors?
All P4SMA24CA 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 P4SMA24CA meets industry standards.
7.What is the process for return or replacement of P4SMA24CA?
All P4SMA24CA units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA24CA, 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 P4SMA24CA part is unused and in its original packaging.
Return procedure for P4SMA24CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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