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Vishay General Semiconductor - Diodes Division P4SMA22CAHM3/I
- Part No.:
- P4SMA22CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA22CAHM3/I.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,266
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Product details
Overview
P4SMA22CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features 22 V standoff voltage (VWM), 24.2 V minimum breakdown voltage (VBR), 30.6 V maximum clamping voltage (VC) at 13.1 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) with 10/1000 µs waveform - used in automotive sensor protection and industrial I/O interface surge suppression.
For engineers reviewing the P4SMA22CAHM3/I datasheet, P4SMA22CAHM3/I pinout, P4SMA22CAHM3/I application, or P4SMA22CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, MSL Level 1 rating, and thermal resistance (RθJA = 120 °C/W) for PCB-level transient immunity design.
Technical Context
This device operates as a voltage-clamped crowbar during ESD or lightning-induced surges, conducting when reverse voltage exceeds VBR (20.9–23.1 V) and limiting transient energy via low incremental surge resistance. Its glass-passivated junction ensures stable breakdown and fast response (<1 ns), while bidirectional symmetry enables protection on AC-coupled or differential lines without polarity constraints.
The P4SMA22CAHM3/I is rated for repetitive 0.01% duty cycle pulses up to 400 W (≤91 V) and derates linearly above TA = 25 °C per Fig. 2. It supports operation from –65 °C to +150 °C junction temperature, with 1.0 mA test current (IT) and ≤1.0 µA reverse leakage (ID) at VWM - meeting UL 497B recognition and JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 18.8 V - maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 20.9–23.1 V at 1.0 mA - precise voltage threshold where avalanche conduction initiates in both directions |
| VC (Clamping Voltage) | 30.6 V at 13.1 A IPPM - peak voltage seen by protected circuit during worst-case 10/1000 µs surge |
| PPPM (Peak Pulse Power) | 400 W - maximum transient energy absorption capability under standardized 10/1000 µs waveform |
| RθJA | 120 °C/W - thermal resistance from junction to ambient air; determines required copper pad area (0.2" × 0.2") for thermal management |
| TJ max. | +150 °C - maximum allowable junction temperature; enables use in under-hood automotive environments |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, matte tin-plated terminals, MSL Level 1 (260 °C peak reflow). Bidirectional construction has no polarity marking; both terminals are electrically symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Identical bidirectional avalanche junction - either terminal serves as input or return; no cathode band marking |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC, differential, or floating signal lines without polarity concerns |
| 400 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when combined with appropriate series impedance |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, ADAS sensors, and body electronics |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profile compatibility without dry-pack handling |
| Glass passivated junction | Ensures stable VBR over time and temperature, with low leakage and high reliability in humid environments |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor outputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 transients in vehicle ECUs. IC Role / Device Role / Timing Role: Standby-mode voltage clamp placed directly at connector entry point to shunt surge energy before reaching ASIC or MCU inputs. Use Value: Maintains signal integrity under 12 V/24 V system surges up to ±300 V, with clamping below 31 V to prevent damage to 3.3 V or 5 V interface ICs. |
Use Scenario: Safeguarding RS-485, Modbus, or 4–20 mA loop interfaces in PLCs and motor drives exposed to field wiring inductive kickback. IC Role / Device Role / Timing Role: Primary transient suppressor across differential pair or supply rail, coordinated with GDT or MOV for multi-stage protection. Use Value: Limits transient overshoot to ≤30.6 V within <1 ns, preserving data integrity and preventing latch-up in isolated transceivers. |
| Consumer USB Port Protection | Telecom Line Card Surge Suppression |
Use Scenario: Secondary-level ESD and surge protection on USB 2.0 D+/D− lines in set-top boxes, routers, and smart home hubs. IC Role / Device Role / Timing Role: Fast-response TVS placed after common-mode choke to absorb contact ESD (IEC 61000-4-2 ±8 kV) and cable discharge events. Use Value: Low clamping voltage (30.6 V) prevents overstress on USB PHY's internal ESD diodes while maintaining signal rise/fall times. |
Use Scenario: Front-end protection of DSL or POTS line interface circuits against lightning-induced surges on outside plant wiring. IC Role / Device Role / Timing Role: First-stage protector mounted at line entry, working with gas discharge tube (GDT) to handle high-energy threats. Use Value: Withstands 400 W peak pulses and maintains ≤1.0 µA leakage at 18.8 V, ensuring minimal impact on line impedance and DC bias stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CA | Higher PPPM (600 W), larger SMB (DO-214AA) package, RθJA = 75 °C/W | Better thermal performance and surge margin; requires larger PCB footprint | Select when higher energy handling (>400 W) or lower thermal resistance is required |
| 1.5KE22CA | Through-hole TO-218 package, same VWM/VBR/VC specs, 1500 W PPPM | Designed for high-power board-level protection; incompatible with SMT assembly | Choose for legacy through-hole designs or where mechanical robustness outweighs automation needs |
Compared with SMBJ22CA and 1.5KE22CA, the P4SMA22CAHM3/I offers optimal balance of compact SMA footprint, AEC-Q101 qualification, and 400 W surge capability - making it preferred for space-constrained automotive and industrial SMT applications where halogen-free compliance and MSL Level 1 are mandatory.
Availability
P4SMA22CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, consumer USB host ports, and telecom line interface circuits requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for P4SMA22CAHM3/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, MOSFETs, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and communications systems where consistent clamping, low leakage, and AEC-Q101 validation are critical.
FAQ
What is the clamping voltage of P4SMA22CAHM3/I at its rated peak pulse current?
The P4SMA22CAHM3/I has a maximum clamping voltage (VC) of 30.6 V at 13.1 A peak pulse current (IPPM), measured under the standardized 10/1000 µs waveform. This value ensures downstream ICs rated for ≤3.3 V or 5 V logic remain protected when the P4SMA22CAHM3/I is correctly applied with series impedance.
Is P4SMA22CAHM3/I suitable for automotive applications?
Yes, the P4SMA22CAHM3/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It is explicitly validated for use in engine control units, ADAS sensors, and body electronics where temperature cycling, humidity resistance, and surge immunity are required.
Does P4SMA22CAHM3/I have polarity markings on its package?
No, the P4SMA22CAHM3/I is a bidirectional TVS diode and carries no cathode band or polarity marking. Both terminals are functionally identical, enabling placement flexibility on AC-coupled or differential signal paths without orientation constraints - a key advantage over unidirectional variants like P4SMA22A.
What is the thermal resistance of P4SMA22CAHM3/I, and how does it affect layout?
The P4SMA22CAHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures during repetitive surges, PCB layout must allocate sufficient copper area and avoid excessive trace length or narrow connections to these pads.
How does the M3 suffix in P4SMA22CAHM3/I differ from the E3 suffix?
The M3 suffix in P4SMA22CAHM3/I denotes halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance, whereas E3 indicates standard RoHS compliance without halogen-free assurance. Both meet commercial-grade reliability, but P4SMA22CAHM3/I satisfies stricter environmental requirements for automotive and green-electronics programs.
P4SMA22CAHM3/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:
- -
- Bidirectional Channels:
- 1
- 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)
P4SMA22CAHM3/I FAQ
1.How can I place an order for P4SMA22CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA22CAHM3/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 P4SMA22CAHM3/I reliable?
The price and inventory of P4SMA22CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA22CAHM3/I is usually 5 days.
3.What payment methods are accepted for P4SMA22CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA22CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA22CAHM3/I?
P4SMA22CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA22CAHM3/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 P4SMA22CAHM3/I?
For technical support, including P4SMA22CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA22CAHM3/I requirements.
6.How does Aetrix verify that P4SMA22CAHM3/I is sourced from the original manufacturer or authorized distributors?
All P4SMA22CAHM3/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 P4SMA22CAHM3/I meets industry standards.
7.What is the process for return or replacement of P4SMA22CAHM3/I?
All P4SMA22CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA22CAHM3/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 P4SMA22CAHM3/I part is unused and in its original packaging.
Return procedure for P4SMA22CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA22CAHM3/I Tags
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