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Taiwan Semiconductor Corporation P4SMA24
- Part No.:
- P4SMA24
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA24.pdf
- Description:
- 400W, 24V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:3,191
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Product details
Overview
P4SMA24 from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for overvoltage protection in DC power rails. It features a 21.6–26.4 V breakdown voltage (VBR), 19.4 V working stand-off voltage (VWM), 34.7 V maximum clamping voltage (VC) at 12 A peak pulse current, and 400 W peak pulse power rating under 10/1000 µs waveform.
For engineers reviewing the P4SMA24 datasheet, P4SMA24 pinout, P4SMA24 application, or P4SMA24 equivalent, key selection considerations include its unidirectional polarity, 1 µA max reverse leakage at VWM, -55°C to +150°C operating junction temperature, ISO 7637-2 compliance for automotive transients, and suitability for compact board-level surge suppression in power converters and adapters.
Technical Context
The P4SMA24 operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its specified VBR range (21.6–26.4 V @ 1 mA), clamping transient energy within 1 ps response time. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at 19.4 V).
Designed for single-die, single-direction protection, it handles non-repetitive 400 W surges per JEDEC JESD22-A114 (10/1000 µs) with thermal derating above 25°C ambient and supports automated SMT placement per moisture sensitivity level 1 (J-STD-020).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 21.6 V / 26.4 V @ 1 mA - defines reliable conduction onset window under standardized test conditions |
| VWM | 19.4 V - maximum continuous reverse voltage before significant leakage begins |
| VC @ IPPM | 34.7 V @ 12 A - clamped voltage during 10/1000 µs surge, limiting downstream component stress |
| PPPM | 400 W - peak transient power dissipation capability under standard waveform |
| IR @ VWM | <1 µA - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| TJ range | -55°C to +150°C - enables deployment in automotive under-hood and industrial power supply environments |
| Package | DO-214AC (SMA) - industry-standard surface-mount outline with cathode band marking and 0.060 g mass |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band; weight ≈ 0.060 g; meets UL 94V-0 and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during forward surge or bias |
| Cathode (banded end) | Reverse-biased clamping terminal | Connected to higher-potential rail; avalanches to clamp transients exceeding VWM |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling |
| Sub-1 ps response time | Enables effective suppression of fast ESD and switching noise before sensitive ICs are damaged |
| ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance | Validates robustness against real-world automotive load dump and inductive switch-off transients |
| RoHS & halogen-free | Meets IEC 61249-2-21 and environmental compliance requirements for global electronics manufacturing |
Applications
| Switching Mode Power Supply (SMPS) | Adapter Input Protection |
|---|---|
Use Scenario: Installed across primary-side DC bus or secondary-side output rail to absorb MOSFET turn-off spikes and input line surges. IC Role / Device Role / Timing Role: Unidirectional TVS diode providing instantaneous clamping during voltage overshoot events. Use Value: Limits peak rail voltage to ≤34.7 V, protecting PWM controllers, optocouplers, and output rectifiers from cumulative overstress. | Use Scenario: Placed at AC-DC adapter input to suppress lightning-induced surges and utility grid transients. IC Role / Device Role / Timing Role: Standoff protector absorbing 400 W pulses without degradation across 19.4 V nominal input. Use Value: Maintains system uptime by preventing fuse blowing or bridge rectifier failure during 10/1000 µs line disturbances. |
| On-board DC/DC Converter | Lighting Application (LED Driver) |
Use Scenario: Mounted directly at input terminals of isolated/non-isolated buck/boost converters in embedded systems. IC Role / Device Role / Timing Role: Fast-acting shunt device diverting inductive kickback from converter switching nodes. Use Value: Prevents latch-up or gate oxide damage in synchronous MOSFETs by clamping <100 ns rise-time transients to safe levels. | Use Scenario: Integrated into constant-current LED driver PCBs to protect driver ICs from hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Unidirectional transient suppressor placed between input capacitor and driver IC supply pin. Use Value: Eliminates false triggering and resets in LED lighting control logic by holding supply rail below 34.7 V during ESD 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 |
|---|---|---|---|
| SMBJ24A | 600 W rating, DO-214AA (SMB) package, bidirectional variant available | Higher power handling but larger footprint; requires layout revision | Select when >400 W surge margin is required and board space allows SMB outline |
| 1.5SMC24A | 1500 W rating, DO-214AB (SMC) package, higher VC (38.9 V) | Greater ruggedness for industrial mains-connected equipment; not drop-in compatible | Choose for harsher environments where 1.5 kW peak immunity outweighs size penalty |
Compared with SMBJ24A and 1.5SMC24A, the P4SMA24 offers optimal balance of 400 W surge capacity, SMA footprint compatibility, and tight 34.7 V clamping-making it ideal for space-constrained DC/DC and adapter designs where precise voltage limiting is critical.
Availability
P4SMA24 is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and on-board DC/DC converters requiring stable component supply with consistent parametric performance and RoHS-compliant sourcing.
Supply support for P4SMA24 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 power management and protection markets since 1979.
The P4SMA24 belongs to TSC's P4SMAx series of surface-mount TVS diodes, engineered specifically for cost-effective, high-reliability transient suppression in consumer, industrial, and automotive auxiliary power systems.
FAQ
What is the polarity configuration of the P4SMA24?
The P4SMA24 is a unidirectional TVS diode, with cathode indicated by a band on the DO-214AC (SMA) package. It conducts in forward bias and clamps reverse transients above its VBR threshold. This polarity must be observed during PCB layout to ensure correct protection orientation relative to the protected rail. The P4SMA24 does not support bidirectional operation unless paired with a complementary device.
Does the P4SMA24 meet automotive transient standards?
Yes, the P4SMA24 meets ISO 7637-2 requirements for Pulse 1, 2a, 2b, 3a, and 3b waveforms-covering typical vehicle electrical disturbances including load dump, battery reversal, and inductive switching transients. Its 400 W peak power rating and 34.7 V clamping voltage make it suitable for 12 V and 24 V automotive subsystems such as body control modules and infotainment power inputs.
What is the maximum clamping voltage of the P4SMA24 under surge conditions?
The P4SMA24 has a maximum clamping voltage (VC) of 34.7 V when subjected to a 10/1000 µs surge waveform at its rated peak pulse current of 12 A. This value is guaranteed across temperature and process variation, and represents the highest voltage seen at the protected node during worst-case transient events-critical for ensuring downstream ICs remain within absolute maximum ratings.
How does the P4SMA24 compare to the P4SMA24A variant?
The P4SMA24A offers tighter VBR tolerance (22.8–25.2 V vs. 21.6–26.4 V) and slightly higher VWM (20.5 V vs. 19.4 V), resulting in lower leakage and improved margin against nuisance tripping. Both share identical package, power rating, and clamping performance. Choose P4SMA24A when design margins require stricter voltage thresholds; otherwise, P4SMA24 provides broader tolerance for cost-sensitive applications.
Is the P4SMA24 compliant with lead-free and halogen-free manufacturing standards?
Yes, the P4SMA24 is RoHS compliant and halogen-free per IEC 61249-2-21. Its matte tin-plated leads are solderable per J-STD-002, and the molding compound meets UL 94V-0 flammability rating. Moisture sensitivity level is rated at Level 1 (J-STD-020), eliminating bake requirements prior to reflow assembly.
P4SMA24 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):
- 19.4V
- Voltage - Breakdown (Min):
- 21.6V
- Voltage - Clamping (Max) @ Ipp:
- 34.7V
- Current - Peak Pulse (10/1000µs):
- 12A
- 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)
P4SMA24 FAQ
1.How can I place an order for P4SMA24 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA24 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 P4SMA24 reliable?
The price and inventory of P4SMA24 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA24 is usually 5 days.
3.What payment methods are accepted for P4SMA24?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA24 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA24?
P4SMA24 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA24 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 P4SMA24?
For technical support, including P4SMA24 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA24 requirements.
6.How does Aetrix verify that P4SMA24 is sourced from the original manufacturer or authorized distributors?
All P4SMA24 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 P4SMA24 meets industry standards.
7.What is the process for return or replacement of P4SMA24?
All P4SMA24 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA24, 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 P4SMA24 part is unused and in its original packaging.
Return procedure for P4SMA24:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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