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Vishay General Semiconductor - Diodes Division P4SMA22AHM3/I
- Part No.:
- P4SMA22AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA22AHM3/I.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,864
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Product details
Overview
P4SMA22AHM3/I 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 a 22 V breakdown voltage (VBR = 20.9–23.1 V at 1 mA), 18.8 V standoff voltage (VWM), 30.6 V 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/I datasheet, P4SMA22AHM3/I pinout, P4SMA22AHM3/I application, or P4SMA22AHM3/I equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS-compliant construction (HM3 suffix), low incremental surge resistance, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
The P4SMA22AHM3/I operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold (VBR), thereby shunting transient energy to ground. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1 ns), critical for protecting sensitive inputs against ESD and inductive switching spikes.
Thermally, it exhibits RθJA = 120 °C/W and RθJL = 30 °C/W, supporting continuous power dissipation of 3.3 W at TA = 50 °C. The device is rated for TJ = –65 to +150 °C and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 20.9–23.1 V at 1 mA test current - defines precise conduction onset for reliable overvoltage clamping |
| Standoff Voltage VWM | 18.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| Clamping Voltage VC | 30.6 V at 13.1 A IPPM - limits protected circuit voltage during 10/1000 µs transient events |
| Peak Pulse Power PPPM | 400 W (10/1000 µs) - sustains high-energy surges without failure under defined waveform conditions |
| Peak Pulse Current IPPM | 13.1 A - maximum non-repetitive surge current the device can safely divert |
| Operating Temperature | –65 °C to +150 °C - supports deployment in under-hood automotive and industrial ambient environments |
| AEC-Q101 Qualified | Yes (HM3 suffix) - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to ground or low-impedance return path to shunt surge current away from protected load |
| Anode (unbanded end) | Protected line input | Connected to power rail or signal line requiring overvoltage protection; reverse-biased during normal operation |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V systems |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage across temperature and lifetime |
| AEC-Q101 qualified (HM3) | Validated for automotive electronics including engine control units and ADAS sensor interfaces |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for EU automotive and industrial markets |
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 chassis ground to clamp surges above 18.8 V. Use Value: Limits rail voltage to ≤30.6 V during 400 W transients, preventing damage to downstream LDOs and microcontrollers. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: TVS mounted at sensor connector to suppress coupling from nearby motor drives or relay switching. Use Value: Sub-1 ns response prevents >30.6 V transients from corrupting 4–20 mA loop integrity or ADC reference stability. |
| Consumer Power Adapter Input Protection | Telecom DC Power Feed Protection |
Use Scenario: Secondary-side overvoltage suppression in USB-C PD adapters after buck converter output. IC Role / Device Role / Timing Role: Clamps output rail during feedback loop failure or synchronous rectifier shoot-through. Use Value: Withstands 13.1 A surge current while holding output below 31 V, preserving USB device compliance. |
Use Scenario: Protecting PoE-powered equipment (e.g., IP cameras) from induced surges on 48 V DC feed lines. IC Role / Device Role / Timing Role: Unidirectional TVS installed between DC+ and ground on powered device side. Use Value: 400 W rating handles IEEE 802.3bt Type 4 surge stress; 18.8 V VWM avoids false triggering on nominal 57 V max. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/5A | Same VBR range (20.9–23.1 V), but lower PPPM (400 W same), higher VC (33.2 V), no AEC-Q101 qualification | Commercial-grade only; not suitable for automotive OEM designs requiring qualification evidence | Select P4SMA22AHM3/I when AEC-Q101 compliance, halogen-free content, or extended temperature validation are mandatory |
| 1.5SMC22A | Higher package thermal mass (DO-214AB), 1.5 kW PPPM rating, but larger footprint and 33.2 V VC | Better for high-energy surges but incompatible with dense layouts requiring SMA footprint | Choose P4SMA22AHM3/I where board space is constrained and 400 W protection suffices with tighter clamping |
Compared with SMAJ22A-E3/5A and 1.5SMC22A, the P4SMA22AHM3/I delivers identical electrical clamping performance in a smaller SMA package while adding AEC-Q101 qualification and halogen-free compliance - making it optimal for space-constrained automotive and industrial SMT designs requiring documented reliability.
Availability
P4SMA22AHM3/I is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interface protection, and telecom DC feed applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for P4SMA22AHM3/I 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series targets cost-sensitive yet reliability-critical transient suppression needs in automotive, industrial, and consumer electronics - delivering standardized TVS performance in compact, qualified, and environmentally compliant packages.
FAQ
What is the clamping voltage of the P4SMA22AHM3/I under a 10/1000 µs surge?
The P4SMA22AHM3/I has a maximum clamping voltage (VC) of 30.6 V at 13.1 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured per Fig. 1 and Fig. 3 in the Vishay datasheet 88367 and reflects the actual voltage seen by the protected circuit during standardized surge testing. The P4SMA22AHM3/I maintains this clamping performance across its full operating temperature range.
Is the P4SMA22AHM3/I suitable for automotive applications?
Yes, the P4SMA22AHM3/I is AEC-Q101 qualified (denoted by the HM3 suffix) and specifically tested for automotive reliability including temperature cycling, high-temperature reverse bias, and ESD. Its operating junction temperature range (–65 °C to +150 °C), MSL Level 1 rating, and halogen-free construction make the P4SMA22AHM3/I appropriate for under-hood and body-control module deployments.
What does the "HM3" suffix indicate in P4SMA22AHM3/I?
The "HM3" suffix in P4SMA22AHM3/I signifies halogen-free, RoHS-compliant construction with AEC-Q101 qualification. The "H" denotes the tape-and-reel packaging option (7" or 13" reel), and "M3" confirms compliance with both RoHS and halogen-free material standards per Vishay's categorization. This distinguishes it from commercial-grade variants like E3 or M3-only parts.
How does the P4SMA22AHM3/I compare to bidirectional TVS diodes?
The P4SMA22AHM3/I is unidirectional and intended for DC line protection where polarity is fixed - it conducts only during reverse overvoltage events. Unlike bidirectional types (e.g., P4SMA22CA), it cannot suppress AC or bipolar transients. Its VWM of 18.8 V allows use on positive rails without forward conduction; the P4SMA22AHM3/I must be oriented with cathode toward the protected circuit's ground reference.
What is the thermal resistance of the P4SMA22AHM3/I, and how does it affect layout?
The P4SMA22AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead (RθJL) of 30 °C/W. To maintain safe operation at 3.3 W continuous dissipation, PCB layout must use minimum 5.0 mm × 5.0 mm copper pads per terminal as specified in the datasheet. Reducing pad size increases junction temperature and risks premature thermal failure of the P4SMA22AHM3/I.
P4SMA22AHM3/I 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/I FAQ
1.How can I place an order for P4SMA22AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA22AHM3/I 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/I reliable?
The price and inventory of P4SMA22AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA22AHM3/I is usually 5 days.
3.What payment methods are accepted for P4SMA22AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA22AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA22AHM3/I?
P4SMA22AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA22AHM3/I 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/I?
For technical support, including P4SMA22AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA22AHM3/I requirements.
6.How does Aetrix verify that P4SMA22AHM3/I is sourced from the original manufacturer or authorized distributors?
All P4SMA22AHM3/I 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/I meets industry standards.
7.What is the process for return or replacement of P4SMA22AHM3/I?
All P4SMA22AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA22AHM3/I, 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/I part is unused and in its original packaging.
Return procedure for P4SMA22AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA22AHM3/I Tags
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