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Taiwan Semiconductor Corporation P4SMA22AH
- Part No.:
- P4SMA22AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA22AH.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,181
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Product details
Overview
P4SMA22AH from Taiwan Semiconductor is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode with a working stand-off voltage of 18.8 V, breakdown voltage range 20.9–23.1 V at 1 mA, and clamping voltage of 30.6 V at 13.7 A (10/1000 µs waveform), designed for automotive-grade overvoltage protection in DC/DC converters and power adapters.
For engineers reviewing the P4SMA22AH datasheet, P4SMA22AH pinout, P4SMA22AH application, or P4SMA22AH equivalent, this device offers AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, <1 µA reverse leakage at VWM, and DO-214AC (SMA) package compatibility with automated SMT assembly.
Technical Context
The P4SMA22AH operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve fast response time (<1.0 ps) and stable clamping under repetitive transients. Its thermal design supports continuous operation from –55 °C to +150 °C junction temperature, with peak pulse power rated at 400 W for 1 ms non-repetitive pulses.
It meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1, enabling robust reflow soldering without preconditioning. The device's low temperature coefficient of VBR (0.092 %/°C) ensures predictable breakdown stability across automotive ambient ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18.8 V - Maximum continuous reverse operating voltage before significant leakage; sets system-level overvoltage trip margin. |
| VBR @ IT=1 mA | 20.9–23.1 V - Verified avalanche onset range; ensures reliable triggering above nominal rail voltage. |
| VC @ IPPM=13.7 A | 30.6 V - Clamped voltage during 10/1000 µs surge; defines maximum stress on downstream ICs. |
| IR @ VWM | <1 µA - Ultra-low reverse leakage preserves efficiency in high-impedance bias networks. |
| PPPM | 400 W - Peak pulse power handling per single 1 ms event; supports ISO 7637-2 Pulse 1 (inductive load dump) immunity. |
| TJ max | +150 °C - Enables placement near hot components (e.g., MOSFETs, inductors) without derating. |
| Package | DO-214AC (SMA) - Standardized SMT footprint with cathode band marking; compatible with IPC-7351B land pattern. |
Pinout & Package
DO-214AC (SMA) package: molded epoxy case with matte tin-plated leads, polarity indicated by cathode band. Weight: 0.060 g. Meets UL 94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-impedance return path; forms current loop with cathode during clamping. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 24 V rail); conducts avalanche current toward anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD-HBM/MM. |
| Glass passivated junction | Eliminates surface contamination sensitivity and improves long-term reliability under humidity and thermal cycling. |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive switch-off), Pulse 2a/2b (load dump coupling), and Pulse 3a/3b (capacitive discharge) waveforms. |
| Fast response time | <1.0 ps - Limits voltage overshoot before clamping engages, protecting sensitive gate drivers and controllers. |
| Moisture sensitivity level 1 | No floor life limitation or bake requirement prior to reflow; simplifies manufacturing logistics. |
Applications
| Automotive Body Control Module (BCM) | Industrial DC/DC Converter Input Stage |
|---|---|
Use Scenario: Protects microcontroller I/O and CAN transceiver power rails against load dump transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between fused battery feed and local regulator input. Use Value: Clamps 12 V rail surges up to 30.6 V, preventing latch-up or permanent damage to 3.3 V/5 V logic supplies. |
Use Scenario: Shields primary-side controller ICs in isolated flyback converters from switching-induced voltage spikes. IC Role / Device Role / Timing Role: Parallel-connected TVS across bulk capacitor input to absorb reflected energy from transformer leakage inductance. Use Value: Limits peak stress on primary MOSFET drain and controller VDD to ≤30.6 V during 400 W transient events. |
| LED Driver Power Supply | Telecom Power Adapter Input |
Use Scenario: Safeguards constant-current LED driver ICs in outdoor streetlight applications exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Mounted at AC-DC rectifier output to clamp differential-mode transients before bulk storage capacitor. Use Value: Maintains VWM = 18.8 V margin above 12 V nominal output while delivering 30.6 V clamping for EN 61000-4-5 Level 3 immunity. |
Use Scenario: Secures secondary-side synchronous rectifier controllers in universal-input AC-DC adapters subjected to mains-borne surges. IC Role / Device Role / Timing Role: Placed across +VOUT and GND after secondary rectification to suppress common-mode noise coupling into feedback circuitry. Use Value: Provides sub-1 µA leakage at 18.8 V, avoiding regulation drift while clamping 10/1000 µs surges to 30.6 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A | Same 22 V nominal VBR, but SMB package (DO-214AA); 600 W peak power rating. | Higher power handling suits higher-energy transients; larger footprint may limit layout density. | Select when surge energy exceeds 400 W or board space allows DO-214AA. |
| 1.5SMC22A | Same VBR range, but DO-214AB (SMC) package; 1500 W peak power, higher IPPM. | Designed for industrial mains input stages; not AEC-Q101 qualified. | Choose for non-automotive, high-energy AC line protection where qualification is not required. |
Compared with SMBJ22A and 1.5SMC22A, the P4SMA22AH delivers optimal balance of AEC-Q101 compliance, compact DO-214AC footprint, and precise 400 W clamping performance for space-constrained automotive and industrial DC power nodes.
Availability
P4SMA22AH is available at Aetrix Electronics and suitable for automotive body control modules, industrial DC/DC converter input stages, and LED driver power supplies requiring stable component supply with full traceability and lifecycle management.
Supply support for P4SMA22AH 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, and rectifiers, with global distribution and AEC-Q101 validation capability.
The P4SMA22AH belongs to TSC's P4SMA(A)H series of automotive-grade surface-mount TVS diodes, engineered specifically for ISO 7637-2-compliant transient suppression in 12 V and 24 V vehicle electrical systems.
FAQ
What is the polarity configuration of the P4SMA22AH?
The P4SMA22AH is a unidirectional TVS diode with cathode band marking indicating the high-side terminal. It conducts only during reverse-biased overvoltage events, making it suitable for DC rail protection where polarity is fixed. Unlike bidirectional variants (e.g., P4SMA22AH with CH suffix), the P4SMA22AH does not conduct in forward direction beyond typical diode forward voltage (~3.5 V at 25 A).
Does the P4SMA22AH meet AEC-Q101 requirements for automotive use?
Yes, the P4SMA22AH is explicitly AEC-Q101 qualified per the manufacturer's documentation. This includes passing high-temperature operating life (HTOL), temperature cycling (TCT), and electrostatic discharge (HBM/MM) tests required for under-hood and cabin electronics. Its DO-214AC package also satisfies JESD201 Class 2 whisker resistance and J-STD-020 MSL Level 1.
What is the maximum clamping voltage of the P4SMA22AH under standard test conditions?
The P4SMA22AH has a maximum clamping voltage (VC) of 30.6 V when subjected to a 10/1000 µs impulse current of 13.7 A. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during transient events, ensuring downstream components remain within safe operating area.
Can the P4SMA22AH be used in bidirectional signal line protection?
No, the P4SMA22AH is unidirectional and unsuitable for bidirectional signal lines such as RS-485 or CAN bus. For those applications, a bidirectional variant like P4SMA22CAH (with CAH suffix) must be selected, as it provides symmetrical clamping in both polarities. Using P4SMA22AH on AC-coupled or reversible signals risks forward conduction and improper protection.
How does the P4SMA22AH compare to the P4SMA22H variant?
The P4SMA22AH features tighter breakdown voltage tolerance (20.9–23.1 V) versus P4SMA22H (19.8–24.2 V), lower VWM (18.8 V vs. 17.8 V), and identical clamping performance (30.6 V vs. 31.9 V). The "A" grade offers improved consistency for designs requiring precise voltage threshold control, especially in regulated 24 V systems where margin to VBR must be tightly managed.
P4SMA22AH 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):
- 18.8V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.6V
- Current - Peak Pulse (10/1000µs):
- 13.7A
- 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)
P4SMA22AH FAQ
1.How can I place an order for P4SMA22AH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA22AH 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 P4SMA22AH reliable?
The price and inventory of P4SMA22AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA22AH is usually 5 days.
3.What payment methods are accepted for P4SMA22AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA22AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA22AH?
P4SMA22AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA22AH 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 P4SMA22AH?
For technical support, including P4SMA22AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA22AH requirements.
6.How does Aetrix verify that P4SMA22AH is sourced from the original manufacturer or authorized distributors?
All P4SMA22AH 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 P4SMA22AH meets industry standards.
7.What is the process for return or replacement of P4SMA22AH?
All P4SMA22AH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA22AH, 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 P4SMA22AH part is unused and in its original packaging.
Return procedure for P4SMA22AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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