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Taiwan Semiconductor Corporation P4SMA16
- Part No.:
- P4SMA16
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA16.pdf
- Description:
- 400W, 16V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:8,484
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Product details
Overview
P4SMA16 from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary-side overvoltage protection in DC power rails. It features a 14.4–17.6 V breakdown voltage (VBR), 12.9 V working stand-off voltage (VWM), 23.5 V clamping voltage (VC) at 17.8 A peak pulse current, and 400 W peak pulse power rating under 10/1000 µs waveform-used in SMPS input stages, DC/DC converters, and lighting drivers.
For engineers reviewing the P4SMA16 datasheet, P4SMA16 pinout, P4SMA16 application, or P4SMA16 equivalent, key selection considerations include its DO-214AC (SMA) package compatibility, <1.0 ps response time, ≤1 µA reverse leakage at VWM, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and -55°C to +150°C operating junction temperature range.
Technical Context
The P4SMA16 operates as a unidirectional avalanche diode with glass-passivated junction, optimized for fast clamping of transient surges on low-voltage DC lines. Its electrical behavior follows IEEE C62.35 standards, with breakdown tested at 1.0 mA and clamping verified per 10/1000 µs waveform per Figure 5.
Thermal derating begins above 25°C ambient per Figure 2, and maximum junction temperature is limited to 150°C. The device exhibits a 0.086 %/°C temperature coefficient of VBR, ensuring predictable voltage drift across industrial temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 14.4 V / 17.6 V at 1.0 mA test current - defines reliable avalanche initiation window |
| VWM | 12.9 V - maximum continuous reverse voltage before significant leakage |
| VC @ IPPM | 23.5 V at 17.8 A (10/1000 µs) - clamped voltage seen by protected circuit during surge |
| PPPM | 400 W - peak transient power handling capability without failure |
| IR @ VWM | ≤1 µA - minimal standby power loss and signal integrity impact |
| TJ max | +150 °C - enables use in high-temperature PCB environments near power components |
| Response time | <1.0 ps - sub-nanosecond reaction ensures protection before IC damage thresholds are exceeded |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-diode configuration with cathode band marking. Matte tin-plated leads meet J-STD-002 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path) in unidirectional clamp configuration |
| Cathode | Avalanche conduction terminal | Connected to protected line (e.g., +12 V rail); conducts when transient exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling |
| ISO 7637-2 compliance | Validated for automotive load-dump and switching transient immunity (Pulse 1/2a/2b/3a/3b) |
| Moisture sensitivity level 1 | No floor-life limitation or bake requirement prior to reflow assembly |
| UL 94V-0 molding compound | Self-extinguishing encapsulation meets safety standards for enclosed power systems |
| Halogen-free construction | Complies with IEC 61249-2-21 for environmentally restricted applications |
Applications
| Switching Mode Power Supply (SMPS) | On-board DC/DC Converter |
|---|---|
Use Scenario: Input rectifier stage of 12 V output flyback converter subjected to line transients and ESD events. IC Role / Device Role / Timing Role: Unidirectional TVS placed between primary-side bulk cap and AC input bridge to clamp differential-mode surges. Use Value: Limits voltage excursion to ≤23.5 V during 400 W transients, preventing MOSFET gate oxide rupture and transformer insulation stress. | Use Scenario: 5 V-to-3.3 V buck converter on industrial control board exposed to back-EMF from relay coils. IC Role / Device Role / Timing Role: Secondary-side TVS across output rail to absorb inductive kickback and prevent LDO or MCU latch-up. Use Value: Clamps 17.8 A surge within <1 ps, maintaining downstream logic supply stability without requiring additional filtering. |
| LED Lighting Driver | AC Adapter Input Stage |
Use Scenario: Constant-current LED driver in outdoor signage subjected to lightning-induced surges on 24 V DC bus. IC Role / Device Role / Timing Role: Primary protection device on DC input before PFC controller, rated for repeated 10/1000 µs pulses. Use Value: Withstands ≥1000 surges at rated PPPM per JEDEC standards, extending field life in harsh electromagnetic environments. | Use Scenario: Universal-input AC/DC adapter with secondary-side regulation experiencing fast-rising common-mode noise. IC Role / Device Role / Timing Role: Unidirectional TVS on low-voltage DC output (e.g., 12 V or 19 V) to protect connected devices. Use Value: 12.9 V VWM allows safe operation across full load/line variation while blocking normal ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ16A | DO-214AA (SMB) package; 16 V nominal VBR; 600 W PPPM; bidirectional variant available | Higher power rating but larger footprint; requires PCB layout change | Select SMBJ16A only if higher surge margin is required and SMA-to-SMB rework is acceptable |
| 1.5SMC16A | DO-214AB (SMC) package; 16 V nominal VBR; 1500 W PPPM; 2.5× larger body than DO-214AC | Designed for high-energy industrial transients; incompatible with SMA land pattern | Choose 1.5SMC16A when system-level testing reveals insufficient margin with 400 W rating |
Compared with P4SMA16, SMBJ16A offers higher surge capacity in a slightly larger package, while 1.5SMC16A delivers threefold power handling at the cost of significant board area-making P4SMA16 optimal for space-constrained, cost-sensitive consumer and industrial DC power interfaces.
Availability
P4SMA16 is available at Aetrix Electronics and suitable for switching mode power supplies, on-board DC/DC converters, and LED lighting drivers requiring stable component supply with consistent parametric performance and RoHS/halogen-free compliance.
Supply support for P4SMA16 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, specializing in TVS diodes, rectifiers, and protection devices since 1979.
The P4SMA series belongs to TSC's surface-mount TVS portfolio engineered specifically for high-reliability, automated-assembly protection in automotive-grade power conversion and industrial control systems.
FAQ
What is the polarity configuration of the P4SMA16?
The P4SMA16 is a unidirectional TVS diode with clearly marked cathode band. It conducts only when the cathode is at a higher potential than the anode-making it suitable for clamping positive transients on DC lines referenced to ground. This polarity must be observed during PCB layout to ensure correct surge diversion path in the P4SMA16 application.
Does the P4SMA16 meet automotive transient immunity standards?
Yes, the P4SMA16 meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for automotive electrical systems. Its 400 W peak pulse power rating and sub-1 ps response time enable robust protection against load dump, inductive switching, and electrostatic discharge events-validated per test conditions defined in the standard and confirmed in Taiwan Semiconductor's characterization reports for the P4SMA16.
What is the maximum allowable junction temperature for continuous operation of the P4SMA16?
The P4SMA16 has a maximum junction temperature (TJ) of +150°C, with derating applied above 25°C ambient per Figure 2 in the official datasheet. At 85°C ambient, the device retains ~70% of its rated 400 W peak pulse power. Thermal design must ensure sufficient copper area and airflow to maintain P4SMA16 junction temperature below this limit during sustained surge activity.
How does the temperature coefficient affect the P4SMA16's breakdown voltage in real-world operation?
The P4SMA16 has a VBR temperature coefficient of +0.086 %/°C, meaning its breakdown voltage increases by approximately 19 mV per °C rise above 25°C. Over the full -55°C to +150°C range, VBR shifts by ±13.4 V from nominal-critical for designs where precise clamping threshold matters, such as in tightly regulated 12 V systems using the P4SMA16.
Is the P4SMA16 compatible with lead-free reflow soldering processes?
Yes, the P4SMA16 uses matte tin-plated leads compliant with J-STD-002 and is rated for standard lead-free reflow profiles (peak 260°C, 60-second duration). Its moisture sensitivity level (MSL) is Level 1 per J-STD-020, eliminating bake requirements prior to assembly-ensuring reliable solder joint formation without popcorn cracking or delamination in the P4SMA16 package.
P4SMA16 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):
- 12.9V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 23.5V
- Current - Peak Pulse (10/1000µs):
- 17.8A
- 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)
P4SMA16 FAQ
1.How can I place an order for P4SMA16 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA16 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 P4SMA16 reliable?
The price and inventory of P4SMA16 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA16 is usually 5 days.
3.What payment methods are accepted for P4SMA16?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA16 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA16?
P4SMA16 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA16 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 P4SMA16?
For technical support, including P4SMA16 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA16 requirements.
6.How does Aetrix verify that P4SMA16 is sourced from the original manufacturer or authorized distributors?
All P4SMA16 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 P4SMA16 meets industry standards.
7.What is the process for return or replacement of P4SMA16?
All P4SMA16 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA16, 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 P4SMA16 part is unused and in its original packaging.
Return procedure for P4SMA16:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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