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Taiwan Semiconductor Corporation P4SMA15AH
- Part No.:
- P4SMA15AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA15AH.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,375
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Product details
Overview
P4SMA15AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power, 14.3–15.8V breakdown voltage (VBR), and 21.2V clamping voltage (VC) at 20A peak impulse current. It provides robust ESD and surge protection for DC/DC converters, automotive power supplies, and lighting circuits operating up to 12.8V working stand-off voltage.
For engineers reviewing the P4SMA15AH datasheet, P4SMA15AH pinout, P4SMA15AH application, or P4SMA15AH equivalent, this device is selected for AEC-Q101-qualified automotive systems requiring sub-1ps response time, <1µA reverse leakage at VWM, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and UL 94V-0 molded case reliability.
Technical Context
The P4SMA15AH employs a glass-passivated silicon junction optimized for fast transient suppression with typical response time under 1.0ps. Its unidirectional configuration features a cathode band marking and operates with a maximum junction temperature of 150°C across –55°C to +150°C ambient range.
It delivers 400W peak pulse power (10/1000μs waveform), clamps transients to ≤21.2V at 20A, and maintains <1µA reverse leakage at its 12.8V working stand-off voltage - enabling reliable overvoltage protection in space-constrained, high-reliability DC power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=1mA | 14.3–15.8V: Ensures precise breakdown activation above normal 12.8V system operating voltage |
| VWM | 12.8V: Maximum continuous reverse voltage before leakage exceeds 1µA - matches 12V automotive rail |
| VC @ IPPM=20A | 21.2V: Clamped voltage during 10/1000μs surge - protects downstream ICs with ≤21V absolute max rating |
| PPPM | 400W: Sustains high-energy transients per ISO 7637-2 without thermal failure |
| IR @ VWM | <1µA: Negligible standby power loss and signal integrity impact in always-on circuits |
| TJ max | 150°C: Enables operation in under-hood automotive environments and enclosed power modules |
| Package | DO-214AC (SMA): Surface-mount footprint compatible with automated placement and J-STD-002 soldering |
Pinout & Package
DO-214AC (SMA) package: molded epoxy case with matte tin-plated leads, polarity indicated by cathode band; weight ≈0.060g; 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 (e.g., GND or return path) in unidirectional TVS configuration |
| Cathode (marked band) | Reverse-biased protection terminal | Connected to protected line (e.g., 12V rail); conducts only during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal stress and humidity exposure |
| Fast response time <1.0ps | Clamps ESD and fast transients before sensitive circuitry experiences damaging voltage overshoot |
| ISO 7637-2 compliant | Withstands defined automotive load dump and switching surge waveforms (Pulse 1/2a/2b/3a/3b) |
| Moisture sensitivity level 1 | Zero bake requirement before reflow - supports standard SMT assembly without preconditioning |
Applications
| Automotive Power Supply Protection | LED Driver Input Protection |
|---|---|
Use Scenario: Protecting 12V input stage of body control module (BCM) against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC/DC converter input. Use Value: Limits transient voltage to ≤21.2V, preventing damage to 24V-tolerant buck controller ICs while maintaining <1µA leakage during quiescent operation. | Use Scenario: Safeguarding constant-current LED driver IC inputs in automotive interior lighting. IC Role / Device Role / Timing Role: Standoff protection on 12V supply line upstream of driver IC's VIN pin. Use Value: Clamps 400W surges within 1ps, preserving LED driver functionality without affecting PWM dimming accuracy or startup behavior. |
| Industrial DC/DC Converter Input | Smart Home Power Adapter Output |
Use Scenario: Input-side surge suppression for isolated 12V-to-3.3V flyback converter in factory automation sensor node. IC Role / Device Role / Timing Role: Primary-side TVS on secondary-side 12V output rail feeding microcontroller power domain. Use Value: Maintains 12.8V working stand-off while clamping ISO 7637-2 Pulse 2b spikes to 21.2V - ensuring stable 3.3V LDO input under surge conditions. | Use Scenario: Output overvoltage protection in USB-C PD adapter supplying 12V to smart speaker base station. IC Role / Device Role / Timing Role: Final-stage TVS on regulated 12V output before connector interface. Use Value: Prevents fault propagation to connected devices during output short-circuit recovery or regulator failure, with no impact on steady-state efficiency due to ultra-low leakage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15A | 600W rating, DO-214AA (SMB) package, 15.6V VC @ 32.4A | Higher power handling but larger footprint; requires PCB layout change | Select when surge energy exceeds 400W or board space allows SMB package |
| 1.5SMC15A | 1500W rating, DO-214AB (SMC) package, 24.4V VC @ 61.5A | Significantly higher clamping voltage; suited for 24V systems, not 12V | Choose only for 24V rail protection where 24.4V clamping is acceptable |
Compared with SMBJ15A and 1.5SMC15A, the P4SMA15AH offers optimal balance of compact DO-214AC size, 12.8V working voltage alignment with 12V systems, and 21.2V clamping - making it preferred for space-constrained automotive and industrial 12V DC/DC inputs where strict voltage limiting is critical.
Availability
P4SMA15AH is available at Aetrix Electronics and suitable for automotive electronics, LED lighting systems, and industrial DC/DC converter designs requiring stable component supply, AEC-Q101 qualification, and consistent DO-214AC packaging.
Supply support for P4SMA15AH 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 with global distribution and AEC-Q101 validation capability.
The P4SMA15AH belongs to TSC's P4SMA(A)H series of surface-mount TVS diodes engineered specifically for automotive and industrial surge immunity - emphasizing low clamping voltage, fast response, and robust package reliability in harsh environments.
FAQ
What is the breakdown voltage range of the P4SMA15AH?
The P4SMA15AH has a guaranteed breakdown voltage (VBR) range of 14.3V to 15.8V at 1mA test current, measured per ANSI/IEEE C62.35 standards. This tight tolerance ensures predictable activation above the 12.8V working stand-off voltage while avoiding false triggering during normal 12V rail operation. The P4SMA15AH's specified VBR window supports reliable overvoltage detection in automotive and industrial power systems.
Is the P4SMA15AH suitable for automotive applications?
Yes, the P4SMA15AH is AEC-Q101 qualified and explicitly designed for automotive use, meeting ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b surge requirements. Its DO-214AC package passes JESD201 Class 2 whisker testing and moisture sensitivity level 1, enabling direct placement in engine control units, body modules, and lighting systems without preconditioning. The P4SMA15AH's 150°C junction rating supports under-hood thermal environments.
What is the clamping voltage of the P4SMA15AH at its rated peak current?
The P4SMA15AH clamps to a maximum of 21.2V at 20A peak impulse current (10/1000μs waveform), as specified in Taiwan Semiconductor's official electrical characteristics table. This clamping performance ensures downstream components with ≤21V absolute maximum ratings remain protected during standardized surge events. The P4SMA15AH achieves this with minimal voltage overshoot due to its sub-1ps response time and glass-passivated junction.
Does the P4SMA15AH have bidirectional capability?
No, the P4SMA15AH is a unidirectional TVS diode, indicated by the absence of "CAH" suffix and presence of cathode band marking. Bidirectional variants in this family use the "CAH" suffix (e.g., P4SMA15CAH). The P4SMA15AH conducts only in reverse bias during overvoltage events and must be oriented with cathode toward the protected line - essential for correct protection in DC power rails like 12V automotive systems.
What packaging and reel quantity is available for the P4SMA15AH?
The P4SMA15AH is supplied in DO-214AC (SMA) package on 7,500-piece tape-and-reel format, compliant with J-STD-002 for solderability and J-STD-020 for moisture sensitivity level 1. This packaging supports high-speed automated placement without baking, and the matte tin-plated leads ensure reliable reflow joint formation. Aetrix Electronics stocks full reels and cut-tape quantities of the P4SMA15AH for prototyping and production use.
P4SMA15AH 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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 20A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA15AH FAQ
1.How can I place an order for P4SMA15AH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA15AH 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 P4SMA15AH reliable?
The price and inventory of P4SMA15AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA15AH is usually 5 days.
3.What payment methods are accepted for P4SMA15AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA15AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA15AH?
P4SMA15AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA15AH 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 P4SMA15AH?
For technical support, including P4SMA15AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA15AH requirements.
6.How does Aetrix verify that P4SMA15AH is sourced from the original manufacturer or authorized distributors?
All P4SMA15AH 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 P4SMA15AH meets industry standards.
7.What is the process for return or replacement of P4SMA15AH?
All P4SMA15AH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA15AH, 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 P4SMA15AH part is unused and in its original packaging.
Return procedure for P4SMA15AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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