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Taiwan Semiconductor Corporation P4SMA22H
- Part No.:
- P4SMA22H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA22H.pdf
- Description:
- 400W, 22V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:7,825
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Product details
Overview
P4SMA22H from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 22 V nominal breakdown voltage (19.8–24.2 V), 17.8 V working stand-off voltage, 31.9 V clamping voltage at 13 A, 400 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the P4SMA22H datasheet, P4SMA22H pinout, P4SMA22H application, or P4SMA22H equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b transients, low leakage (<1 µA at 17.8 V), fast response (<1.0 ps), and DO-214AC (SMA) package compatibility with automated SMT assembly.
Technical Context
The P4SMA22H operates as a unidirectional avalanche diode, conducting only in reverse bias above its breakdown threshold to shunt surge energy to ground. Its glass-passivated junction ensures stable VBR tolerance (±5% typical), low temperature coefficient (0.092 %/°C), and reliable operation from –55 °C to +150 °C junction temperature.
It meets ISO 7637-2 immunity requirements for automotive electronics and supports high-reliability applications where low capacitance (<100 pF at 0 V, per family data), minimal leakage, and repeatable clamping are critical - especially in on-board DC/DC converters and SMPS input stages exposed to load dump or inductive switching transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 19.8 V / 24.2 V - defines guaranteed avalanche conduction range at 1 mA test current; ensures consistent turn-on across temperature and unit variation |
| VWM | 17.8 V - maximum continuous reverse operating voltage; must exceed system DC rail to prevent leakage-induced power loss |
| VC@IPPM | 31.9 V at 13 A - clamping voltage during 10/1000 µs surge; determines worst-case overvoltage seen by protected ICs |
| PPPM | 400 W - peak pulse power rating; defines single-event surge energy handling capability without failure |
| IR@VWM | <1 µA - reverse leakage at stand-off voltage; critical for low-power standby circuits and battery-backed systems |
| TJ max | +150 °C - maximum junction temperature; enables use in under-hood automotive environments and thermally constrained PCB layouts |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-diode configuration with cathode band marking. Matte tin-plated leads meet J-STD-002 solderability; moisture sensitivity level 1 (J-STD-020).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to protected line (e.g., +12 V rail); conducts forward current only during fault conditions in unidirectional mode |
| Cathode | Reverse-biased avalanche terminal | Connected to ground or lower-potential reference; initiates clamping when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD; suitable for engine control, body electronics, and ADAS modules |
| Glass passivated junction | Enhances long-term stability of VBR and leakage performance under thermal cycling and humidity exposure |
| Clamping voltage ≤31.9 V @13 A | Provides margin below 33 V-rated downstream components (e.g., LDOs, microcontrollers) during ISO 7637-2 Pulse 2b (50 V/2 Ω) |
| Fast response <1.0 ps | Ensures suppression before transient energy couples into sensitive analog or digital circuitry; no propagation delay penalty |
Applications
| Automotive Body Control Module (BCM) | Industrial SMPS Input Stage |
|---|---|
Use Scenario: Protects LIN bus transceivers and power MOSFET gate drivers from load dump and alternator ripple in vehicle door modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12 V supply rail and ground, clamping transients within 1.0 ps to limit voltage excursion to ≤31.9 V. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic ICs and ensures compliance with ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 2b (load dump). | Use Scenario: Shields primary-side controller ICs and optocoupler inputs in 24 V industrial AC/DC adapters against surges from mains switching and lightning-induced spikes. IC Role / Device Role / Timing Role: Standoff-rated TVS on DC bus input, absorbing 400 W pulses without degradation while maintaining <1 µA leakage at 17.8 V. Use Value: Enables compact, high-efficiency designs by eliminating need for bulkier MOV-based protection and reduces BOM count versus multi-stage solutions. |
| LED Driver Power Supply | On-board DC/DC Converter |
Use Scenario: Safeguards constant-current LED driver ICs in streetlight and signage applications from inductive kickback during PWM dimming and hot-swap events. IC Role / Device Role / Timing Role: Reverse-biased TVS across input capacitor terminals, clamping voltage spikes to 31.9 V before they reach the driver's VIN pin. Use Value: Extends LED system lifetime by preventing cumulative stress on internal ESD structures and avoids false shutdown due to overvoltage detection. | Use Scenario: Integrated into 48 V-to-12 V buck converter PCBs for telecom and server power distribution units to protect synchronous rectifier FETs and controller feedback networks. IC Role / Device Role / Timing Role: Unidirectional TVS placed at converter input, rated for 17.8 V stand-off and 13 A peak impulse current per IEC 61000-4-5 Level 3. Use Value: Maintains regulation integrity during 10/1000 µs surges by limiting voltage overshoot to safe levels for gate oxide and bootstrap capacitor ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A | DO-214AA (SMB) package; same 22 V VBR range but higher 600 W PPPM; slightly larger footprint | Higher surge rating suits heavier industrial loads; less space-constrained than SMA-layout PCBs | Select SMBJ22A when board area allows and >400 W surge margin is required; not drop-in due to different pad layout |
| 1.5SMC22A | DO-214AB (SMC) package; 400 W rating same as P4SMA22H but 1.5 kW peak for shorter pulses; higher thermal mass | Better sustained surge handling in high-temperature ambient (>85 °C); used in motor drive front-ends | Choose 1.5SMC22A for elevated ambient or repetitive surge environments; requires rework of land pattern and stencil |
Compared with SMBJ22A and 1.5SMC22A, the P4SMA22H offers optimal balance of AEC-Q101 compliance, DO-214AC footprint efficiency, and proven 400 W transient immunity - making it preferred for space-limited automotive and consumer power supplies where validated qualification and SMT placement yield matter most.
Availability
P4SMA22H is available at Aetrix Electronics and suitable for automotive body electronics, industrial SMPS input protection, and LED driver power supplies requiring stable component supply with full traceability and lifecycle management.
Supply support for P4SMA22H 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-compliant production lines.
The P4SMA22H belongs to TSC's P4SMAxH series of surface-mount TVS diodes, engineered specifically for high-reliability automotive and industrial transient suppression where compact size, low leakage, and ISO 7637-2 compliance are mandatory.
FAQ
What is the polarity configuration of the P4SMA22H?
The P4SMA22H is a unidirectional TVS diode, meaning it functions as a reverse-biased avalanche device with cathode band marking. It conducts only when reverse voltage exceeds its breakdown threshold (19.8–24.2 V), and blocks forward current up to 3.5 V at 25 A. This configuration is ideal for protecting DC power rails where polarity is fixed and bidirectional surges are not expected. The P4SMA22H does not conduct in forward direction under normal operation.
Does the P4SMA22H meet automotive qualification standards?
Yes, the P4SMA22H is AEC-Q101 qualified, having passed accelerated stress tests including high-temperature operating life (HTOL), temperature cycling (TCT), and electrostatic discharge (ESD). It also meets ISO 7637-2 immunity requirements for Pulse 1, 2a, 2b, 3a, and 3b, confirming suitability for automotive power network protection. This qualification applies specifically to the P4SMA22H part number as documented in Taiwan Semiconductor's A2102 revision datasheet.
What is the maximum clamping voltage of the P4SMA22H under surge conditions?
The P4SMA22H has a maximum clamping voltage (VC) of 31.9 V at 13 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is measured under defined test conditions and represents the highest voltage that will appear across the device during a 400 W transient event. Designers must ensure downstream components have sufficient voltage margin above this clamping level to avoid overstress.
Can the P4SMA22H be used in bidirectional applications?
No - the P4SMA22H is strictly unidirectional. For bidirectional transient suppression, Taiwan Semiconductor specifies variants with "CH" or "CAH" suffixes (e.g., P4SMA22CH), which contain back-to-back diode configurations. Using the P4SMA22H in bidirectional signal lines would result in forward conduction during negative transients, potentially damaging the device or failing to clamp. Always verify polarity alignment in schematic and layout for the P4SMA22H.
What is the moisture sensitivity level (MSL) and reflow profile guidance for the P4SMA22H?
The P4SMA22H has a moisture sensitivity level (MSL) of 1 per J-STD-020, meaning it is not moisture-sensitive and may be stored indefinitely at ambient conditions without dry-pack requirements. It supports standard lead-free reflow profiles, with peak temperature up to 260 °C for ≤30 seconds. Its matte tin-plated leads comply with J-STD-002 for solderability, and the DO-214AC package is compatible with automated pick-and-place equipment.
P4SMA22H 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):
- 17.8V
- Voltage - Breakdown (Min):
- 19.8V
- Voltage - Clamping (Max) @ Ipp:
- 31.9V
- Current - Peak Pulse (10/1000µs):
- 13A
- 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)
P4SMA22H FAQ
1.How can I place an order for P4SMA22H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA22H 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 P4SMA22H reliable?
The price and inventory of P4SMA22H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA22H is usually 5 days.
3.What payment methods are accepted for P4SMA22H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA22H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA22H?
P4SMA22H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA22H 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 P4SMA22H?
For technical support, including P4SMA22H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA22H requirements.
6.How does Aetrix verify that P4SMA22H is sourced from the original manufacturer or authorized distributors?
All P4SMA22H 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 P4SMA22H meets industry standards.
7.What is the process for return or replacement of P4SMA22H?
All P4SMA22H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA22H, 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 P4SMA22H part is unused and in its original packaging.
Return procedure for P4SMA22H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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