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Vishay General Semiconductor - Diodes Division P4SMA22AHM3/H
- Part No.:
- P4SMA22AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA22AHM3/H.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,116
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Product details
Overview
P4SMA22AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features 22 V breakdown voltage (VBR = 20.9–23.1 V at 1 mA), 18.8 V standoff voltage (VWM), 30.6 V maximum clamping voltage (VC) at 13.1 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the P4SMA22AHM3/H datasheet, P4SMA22AHM3/H pinout, P4SMA22AHM3/H application, or P4SMA22AHM3/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 120 °C/W), polarity marking (cathode band), and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker test.
Technical Context
This unidirectional TVS diode operates by avalanche breakdown to clamp transient overvoltages above its standoff voltage. Its glass-passivated junction ensures stable VBR tolerance (±5 %), low incremental surge resistance, and fast response time (<1 ns), enabling effective suppression of ESD, lightning-induced surges, and inductive switching spikes.
Rated for 150 °C maximum junction temperature and compliant with AEC-Q101 for automotive use, the P4SMA22AHM3/H supports repetitive surge duty cycles up to 0.01 % (300 W derated above 91 V) and meets UL 497B recognition (QVGQ2) for protector classification. It is mounted on 5.0 mm × 5.0 mm copper pads per JEDEC standard layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at IT = 1 mA - defines precise avalanche initiation range for reliable clamping threshold |
| VWM | 18.8 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 30.6 V at 13.1 A - clamped voltage during 10/1000 µs surge, limiting stress on downstream components |
| PPPM | 400 W - peak pulse power handling capability under standardized transient waveform |
| IFSM | 40 A - single half-sine surge current rating (8.3 ms), supporting high-energy inductive load switching |
| RθJA | 120 °C/W - thermal resistance from junction to ambient, critical for PCB pad layout and power derating |
| TJ max | +150 °C - maximum junction temperature, enabling operation in under-hood automotive environments |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (reflow peak 260 °C). Cathode indicated by molded band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts avalanche current to ground during overvoltage events |
| Anode (unmarked end) | Reference node | Typically tied to system ground or lower-potential rail; completes clamping path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Halogen-free construction | Meets IEC 61249-2-21; eliminates brominated flame retardants for safer end-of-life processing |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter consistency across thermal and life stress |
| Low profile SMA package | Enables automated placement and high-density PCB layouts while maintaining 400 W surge capability |
| UL 497B recognized (QVGQ2) | Approved for use in telecom and industrial surge protection circuits without additional certification |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp surges above 18.8 V. Use Value: Limits peak voltage to 30.6 V during 13.1 A transients, preventing damage to 36 V-rated regulators and CAN transceivers. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: TVS connected across sensor output and ground to suppress ESD and cable discharge events. Use Value: Sub-1 ns response and 30.6 V clamping prevent latch-up or parametric shift in precision 24-bit ADC front-ends. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Input Stage |
|
Use Scenario: Secondary-side transient suppression on PoE-powered Ethernet switch ports. IC Role / Device Role / Timing Role: Standoff-rated TVS on 48 V DC supply line to absorb induced surges from nearby AC mains coupling. Use Value: 400 W peak power rating handles multiple 10/1000 µs surges without degradation, meeting IEC 61000-4-5 Level 3. |
Use Scenario: Input-stage overvoltage protection in USB-C PD adapters with wide-input-range controllers. IC Role / Device Role / Timing Role: Clamping device between primary-side bulk capacitor and controller IC to limit gate drive overvoltage. Use Value: 18.8 V VWM aligns with 15–20 V bias rails; 30.6 V VC stays below 33 V absolute maximum ratings of common HV controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A | Higher package thermal resistance (RθJA ≈ 150 °C/W), same VBR range but SMB package (DO-214AA), 600 W PPPM | Requires larger PCB footprint; better suited for higher-power, lower-density designs | Select when board space allows larger package and higher surge margin is needed beyond 400 W |
| 1.5SMC22A | Same VBR/VWM, but SMC (DO-214AB) package, 1500 W PPPM, RθJA ≈ 100 °C/W | Designed for chassis-level protection; not optimized for fine-pitch SMT assembly | Choose for primary-side surge protection where higher energy absorption and manual rework tolerance are prioritized |
Compared with SMBJ22A and 1.5SMC22A, the P4SMA22AHM3/H offers optimal balance of compact SMA footprint, AEC-Q101 qualification, halogen-free compliance, and 400 W surge capability - making it preferred for space-constrained automotive and industrial modules requiring production-grade reliability and automated assembly.
Availability
P4SMA22AHM3/H is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O cards, telecom line interface units, and consumer power adapter input stages requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for P4SMA22AHM3/H 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The P4SMA Series was developed for robust, surface-mount transient suppression in automotive, industrial, and telecom systems - delivering AEC-Q101-qualified, halogen-free TVS diodes with tight VBR tolerance and industry-standard SMA packaging.
FAQ
What is the breakdown voltage tolerance for P4SMA22AHM3/H?
The P4SMA22AHM3/H has a breakdown voltage (VBR) range of 20.9 V to 23.1 V at 1 mA test current, corresponding to ±5 % tolerance around the nominal 22 V rating. This tight tolerance ensures consistent clamping behavior across production lots and supports precise circuit protection design without overspecifying margin.
Is P4SMA22AHM3/H qualified for automotive applications?
Yes, the P4SMA22AHM3/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" (halogen-free, RoHS-compliant, AEC-Q101 qualified) and documented in the P4SMA series datasheet revision 09-Jan-2024. It undergoes stress testing for temperature cycling, high-temperature reverse bias, and ESD per automotive reliability standards.
What does the "H" in P4SMA22AHM3/H indicate?
The final "H" in P4SMA22AHM3/H denotes the packaging configuration: 7-inch diameter plastic tape and reel, with 1800 units per reel. This is specified in Vishay's ordering information table and aligns with standard SMT assembly logistics for high-volume manufacturing.
How does the clamping voltage of P4SMA22AHM3/H compare to its standoff voltage?
The P4SMA22AHM3/H has a standoff voltage (VWM) of 18.8 V and a maximum clamping voltage (VC) of 30.6 V at 13.1 A. This 11.8 V differential ensures sufficient margin between normal operating voltage and worst-case transient clamping level, protecting downstream 24 V-rated components while avoiding false triggering during ripple or noise.
Can P4SMA22AHM3/H be used in bidirectional configurations?
No, P4SMA22AHM3/H is a unidirectional TVS diode, as indicated by the "A" suffix (not "CA") and cathode band marking. Bidirectional operation requires a part with "CA" suffix (e.g., P4SMA22CA); using P4SMA22AHM3/H in reverse-biased AC applications would result in forward conduction and failure.
P4SMA22AHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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):
- 13.1A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA22AHM3/H FAQ
1.How can I place an order for P4SMA22AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA22AHM3/H 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 P4SMA22AHM3/H reliable?
The price and inventory of P4SMA22AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA22AHM3/H is usually 5 days.
3.What payment methods are accepted for P4SMA22AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA22AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA22AHM3/H?
P4SMA22AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA22AHM3/H 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 P4SMA22AHM3/H?
For technical support, including P4SMA22AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA22AHM3/H requirements.
6.How does Aetrix verify that P4SMA22AHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA22AHM3/H 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 P4SMA22AHM3/H meets industry standards.
7.What is the process for return or replacement of P4SMA22AHM3/H?
All P4SMA22AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA22AHM3/H, 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 P4SMA22AHM3/H part is unused and in its original packaging.
Return procedure for P4SMA22AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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