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Taiwan Semiconductor Corporation P4SMA16AH
- Part No.:
- P4SMA16AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA16AH.pdf
- Description:
- TVS DIODE 13.6VWM 22.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,907
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Product details
Overview
P4SMA16AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power, 15.2–16.8V breakdown voltage (VBR), 13.6V working stand-off voltage (VWM), and clamps to ≤22.5V at 18.6A peak impulse current - deployed for surge protection in automotive DC/DC converters and industrial power adapters.
For engineers reviewing the P4SMA16AH datasheet, P4SMA16AH pinout, P4SMA16AH application, or P4SMA16AH equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, <1μA reverse leakage at VWM, and 1.0ps typical response time - critical for robust ESD and load-dump immunity in 12V/24V embedded systems.
Technical Context
The P4SMA16AH uses a glass-passivated silicon junction optimized for fast transient suppression with sub-nanosecond response. Its unidirectional configuration provides asymmetric clamping: low forward voltage (VF = 3.5V @ 25A) during overvoltage events and tight reverse standoff (VWM = 13.6V) to avoid false triggering in nominal 12V rail applications.
Thermal design is enabled by a 150°C maximum junction temperature and derating per Fig.2, while mechanical reliability is assured by JESD201 Class 2 whisker resistance, UL 94V-0 molding compound, and matte tin-plated leads compliant with J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 15.2V / 16.8V - defines precise breakdown threshold for reliable activation above 13.6V system operating voltage |
| VWM | 13.6V - maximum continuous reverse voltage without significant leakage; ensures no interference on 12V nominal rails |
| VC@IPPM | ≤22.5V @ 18.6A - clamping voltage limits downstream IC stress during ISO 7637-2 Pulse 2b (load dump) |
| IR@VWM | ≤1μA - ultra-low leakage preserves battery life in always-on automotive modules |
| PPPM | 400W - peak pulse power rating for 10/1000μs waveform; supports high-energy transients in SMPS inputs |
| TJ max | 150°C - enables operation in under-hood environments without thermal shutdown |
| Response time | <1.0ps - ensures clamping before sensitive logic or analog circuitry sustains damage |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking; compact 4.5mm × 2.7mm footprint, 2.2mm height, and 0.060g weight - compatible with automated pick-and-place and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connects to protected line (e.g., +12V input); conducts during overvoltage clamp in forward direction |
| Cathode | Reverse-biased reference terminal | Connected to ground or lower-potential rail; establishes VWM and VBR thresholds in unidirectional operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives in humid environments |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect/load dump), and Pulse 3a/3b (line transients) |
| Moisture sensitivity level 1 | Zero bake requirement before reflow; simplifies manufacturing and reduces BOM handling cost |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green electronics manufacturing |
Applications
| Automotive DC/DC Converters | Industrial Power Adapters |
|---|---|
Use Scenario: Protecting 12V-to-5V/3.3V buck converter inputs against load dump and alternator surges in vehicle infotainment ECUs. IC Role / Device Role: Unidirectional TVS placed between input rail and ground to clamp transients before upstream regulator. Use Value: Clamps to ≤22.5V at 18.6A, limiting stress on 30V-rated input capacitors and enabling use of cost-optimized 24V-input regulators. | Use Scenario: Safeguarding AC/DC adapter secondary-side outputs against ESD and switching noise in factory automation sensors. IC Role / Device Role: Output-side TVS suppressing fast-rising transients induced by relay coil de-energization or cable coupling. Use Value: Sub-1ps response and <1μA leakage preserve signal integrity and standby current in 24V industrial I/O modules. |
| LED Lighting Drivers | On-Board Battery Chargers |
Use Scenario: Shielding constant-current LED driver ICs from voltage spikes caused by hot-plug events or inductive ballast switching. IC Role / Device Role: Input-stage TVS absorbing energy from 400W 10/1000μs pulses without degradation across 1000+ surge cycles. Use Value: 400W rating and 150°C TJ max ensure stable operation in enclosed luminaires with limited airflow. | Use Scenario: Guarding lithium-ion battery charger front-ends against reverse battery connection and jump-start surges in portable medical devices. IC Role / Device Role: Bidirectional protection not applicable; P4SMA16AH used unidirectionally to block negative transients while allowing normal charging current flow. Use Value: 3.5V VF at 25A minimizes forward conduction loss during fault conditions, reducing thermal stress on PCB traces. |
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 | 600W rating, SMB package (larger footprint), 16V VWM, 25.6V VC @ 23.5A | Higher power handling but requires PCB area increase; less suitable for space-constrained automotive modules | Select when higher surge margin is needed and board space allows SMB footprint |
| 1.5SMC16A | 1500W rating, SMC package (7.1mm × 6.2mm), 16V VWM, 26.0V VC @ 57.7A | Designed for heavy-duty industrial equipment; over-specified for automotive 12V systems | Choose only for legacy designs requiring SMC compatibility or extreme surge immunity |
Compared with SMBJ16A and 1.5SMC16A, the P4SMA16AH delivers optimal balance of 400W surge capability, DO-214AC footprint efficiency, and AEC-Q101 qualification - making it the preferred choice for new automotive and space-sensitive industrial designs where 22.5V clamping and 13.6V standoff are critical.
Availability
P4SMA16AH is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial power adapters, and LED lighting drivers requiring stable component supply with full traceability and lifecycle management.
Supply support for P4SMA16AH 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 - headquartered in Hsinchu, Taiwan, with global distribution and AEC-Q101 validation capabilities.
The P4SMA16AH belongs to TSC's P4SMA(A)H series of surface-mount TVS diodes engineered specifically for automotive and industrial transient suppression - emphasizing fast response, low leakage, and robust ISO 7637-2 compliance in compact SMA packages.
FAQ
What is the polarity configuration of the P4SMA16AH?
The P4SMA16AH is a unidirectional TVS diode, featuring anode and cathode terminals with cathode band marking. It operates as a reverse-biased clamp in normal operation and conducts forward during positive transients - distinct from bidirectional variants like P4SMA16CAH. This configuration ensures precise 13.6V standoff and avoids false triggering on 12V systems. The P4SMA16AH must be oriented with cathode toward ground in standard protection layouts.
Does the P4SMA16AH meet automotive qualification standards?
Yes, the P4SMA16AH is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per the AEC-Q101-004 standard. It also meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for automotive electrical disturbances - confirming suitability for engine control units, body electronics, and ADAS power supplies. The P4SMA16AH's qualification is documented in Taiwan Semiconductor's official AEC-Q101 report A2102.
What is the maximum clamping voltage of the P4SMA16AH under surge conditions?
The P4SMA16AH has a maximum clamping voltage (VC) of 22.5V at its rated peak impulse current (IPPM) of 18.6A, tested with a 10/1000μs waveform. This value is guaranteed across temperature and process variation per the datasheet's Electrical Specifications table. Designers use this 22.5V clamping limit to verify downstream ICs - such as 24V-input regulators or microcontrollers - remain within absolute maximum ratings during load-dump events. The P4SMA16AH achieves this performance with <1.0ps response time.
How does the P4SMA16AH compare to the P4SMA16H variant?
The P4SMA16AH offers tighter breakdown voltage tolerance (15.2–16.8V) versus P4SMA16H (14.4–17.6V), resulting in more consistent clamping behavior across production lots. Both share identical package (DO-214AC), power rating (400W), and AEC-Q101 qualification. The P4SMA16AH's narrower VBR range improves design margin in safety-critical applications where precise threshold control is required - such as automotive sensor power rails. The P4SMA16AH marking code is AZJ, while P4SMA16H is AYJ.
Is the P4SMA16AH suitable for bidirectional transient protection?
No, the P4SMA16AH is strictly unidirectional and not rated for bidirectional operation. For symmetrical surge suppression (e.g., data lines or AC inputs), Taiwan Semiconductor specifies the P4SMA16CAH variant, which features center-tap construction and identical VBR in both directions. Using the P4SMA16AH in bidirectional configurations risks failure during negative transients due to lack of reverse breakdown specification. Always verify polarity alignment in layout - the P4SMA16AH cathode band must face ground.
P4SMA16AH 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA16AH FAQ
1.How can I place an order for P4SMA16AH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA16AH 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 P4SMA16AH reliable?
The price and inventory of P4SMA16AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA16AH is usually 5 days.
3.What payment methods are accepted for P4SMA16AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA16AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA16AH?
P4SMA16AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA16AH 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 P4SMA16AH?
For technical support, including P4SMA16AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA16AH requirements.
6.How does Aetrix verify that P4SMA16AH is sourced from the original manufacturer or authorized distributors?
All P4SMA16AH 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 P4SMA16AH meets industry standards.
7.What is the process for return or replacement of P4SMA16AH?
All P4SMA16AH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA16AH, 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 P4SMA16AH part is unused and in its original packaging.
Return procedure for P4SMA16AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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