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Vishay General Semiconductor - Diodes Division P4SMA22CAHM3/H
- Part No.:
- P4SMA22CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA22CAHM3/H.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,971
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Product details
Overview
P4SMA22CAHM3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features a 22 V standoff voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 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 systems.
For engineers reviewing the P4SMA22CAHM3/H datasheet, P4SMA22CAHM3/H pinout, P4SMA22CAHM3/H application, or P4SMA22CAHM3/H equivalent, this device is selected for robust ESD and surge protection where bidirectional clamping, AEC-Q101 qualification, halogen-free RoHS compliance, and low-profile surface-mount packaging are required.
Technical Context
The P4SMA22CAHM3/H operates as a bidirectional avalanche diode, symmetrically clamping voltage surges above ±24.4 V in either polarity without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and fast response (<1 ns), while its low incremental surge resistance minimizes voltage overshoot during transient events.
Rated for 400 W peak pulse power (10/1000 µs), it delivers 13.1 A peak pulse current into a defined test circuit and maintains clamping performance up to 150 °C junction temperature. The device meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 22 V - Maximum continuous reverse working voltage before conduction begins in either direction. |
| VBR (Breakdown Voltage) | 24.4–26.9 V at 1 mA - Confirmed avalanche onset range ensuring reliable triggering under transient stress. |
| VC (Clamping Voltage) | 30.6 V at 13.1 A - Maximum voltage seen across protected circuit during 10/1000 µs surge, limiting stress on downstream components. |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy absorption capability under standardized surge waveform, derated above 25 °C ambient. |
| IPPM (Peak Pulse Current) | 13.1 A - Peak current handled during 10/1000 µs transient, defining minimum trace/solder joint robustness requirements. |
| TJmax | 150 °C - Maximum allowable junction temperature supporting operation in under-hood or high-temperature industrial enclosures. |
| Package | SMA (DO-214AC) - Low-profile surface-mount outline with 5.0 mm × 5.0 mm copper pad thermal design recommendation. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1, compatible with reflow soldering (peak 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; symmetrical node in bidirectional operation | No marking; both terminals function identically - no polarity dependency for transient suppression. |
| Cathode | Current exit terminal in forward bias; symmetrical node in bidirectional operation | No band or marking - device lacks polarity identification per bidirectional design convention. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for global automotive and industrial OEM supply chains. |
| 400 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly laid out with recommended PCB copper area. |
| Low profile SMA package | 0.208" × 0.157" footprint enables dense placement near connectors or ICs without height interference. |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) connected to microcontroller ADC inputs against load dump and inductive switching transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and ground, clamping ±30.6 V surges to prevent latch-up or damage to precision front-end circuitry. Use Value: Maintains signal integrity below 30.6 V clamp level while surviving repeated 400 W pulses - critical for ASIL-B functional safety paths. |
Use Scenario: Safeguarding CAN_H and CAN_L differential pair against ESD (IEC 61000-4-2) and surge (IEC 61000-4-5) in factory automation gateways and motor drives. IC Role / Device Role / Timing Role: Two P4SMA22CAHM3/H devices deployed in common-mode configuration across each bus line to ground, leveraging symmetrical clamping behavior. Use Value: Enables robust 22 V operating margin relative to nominal ±12 V CAN common-mode range while meeting AEC-Q101 qualification for long-term field deployment. |
| Consumer Power Adapter Input Stage | Telecom DSL Line Interface |
|
Use Scenario: Secondary-side overvoltage protection on 5–24 V DC output rails of wall adapters subjected to lightning-induced surges via shared AC mains. IC Role / Device Role / Timing Role: Bidirectional TVS placed across output terminals to shunt transient energy before reaching downstream regulators or USB ports. Use Value: 30.6 V clamping ensures safe operation of 24 V-rated LDOs and USB PD controllers without requiring additional series impedance. |
Use Scenario: Transient suppression on twisted-pair DSL lines exposed to induced surges from nearby power cables or lightning coupling in residential distribution networks. IC Role / Device Role / Timing Role: Paired P4SMA22CAHM3/H units installed line-to-ground on tip/ring conductors, exploiting matched bidirectional VBR tolerance (±5 %) for balanced protection. Use Value: Matches ITU-T K.21 basic protection level with verified 400 W surge handling and <1 ns response, minimizing bit errors during surge events. |
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 | Same VWM/VBR/VC, but SMB package (DO-214AA); 600 W PPPM; higher thermal mass and larger footprint. | Preferred where higher surge margin or legacy board space allows larger package; not drop-in due to different pad layout. | Select when 600 W rating is required and PCB real estate permits 2.54 mm lead pitch increase. |
| 1.5KE22CA | Through-hole DO-15 package; same electrical specs but 1500 W PPPM; higher IPPM (68.2 A); no AEC-Q101 qualification. | Used in non-automotive industrial power supplies where manual assembly or higher surge headroom is prioritized over surface-mount density. | Choose only for cost-sensitive, non-automotive designs where AEC-Q101 is not mandated and through-hole assembly is acceptable. |
Compared with SMBJ22CA and 1.5KE22CA, the P4SMA22CAHM3/H provides optimal balance of AEC-Q101 compliance, halogen-free construction, and compact SMA footprint - making it the preferred choice for new automotive and space-constrained industrial designs requiring validated reliability.
Availability
P4SMA22CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial CAN gateways, consumer power adapters, and telecom DSL interfaces requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4SMA22CAHM3/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, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The P4SMA Series targets high-reliability transient suppression in automotive, industrial, and communications systems - engineered for AEC-Q101 compliance, low-profile mounting, and repeatable clamping performance across temperature and lifetime.
FAQ
What does the 'HM3' suffix indicate in P4SMA22CAHM3/H?
The 'HM3' suffix in P4SMA22CAHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. The 'H' indicates 7-inch tape-and-reel packaging (1800 units per reel), and '/H' confirms the packaging variant. This distinguishes it from commercial-grade 'M3' or automotive 'HE3' variants, ensuring compliance for automotive Tier 1 suppliers and industrial OEMs requiring material declarations.
Is P4SMA22CAHM3/H suitable for protecting RS-485 communication lines?
Yes, P4SMA22CAHM3/H is suitable for RS-485 line protection. Its 22 V VWM accommodates standard ±7 V common-mode range with margin, and 30.6 V VC clamping prevents damage to transceivers rated for ≤36 V absolute maximum. Bidirectional operation matches differential signaling, and AEC-Q101 qualification supports use in harsh industrial environments where RS-485 links operate.
Does P4SMA22CAHM3/H have polarity markings on the package?
No, P4SMA22CAHM3/H has no polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants (e.g., P4SMA22A), it lacks a cathode band and functions identically in both directions - simplifying PCB layout and eliminating orientation errors during automated placement.
What is the maximum PCB copper pad size recommended for P4SMA22CAHM3/H thermal performance?
The datasheet specifies 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for P4SMA22CAHM3/H to achieve rated 400 W peak pulse power. Smaller pads reduce heat dissipation and cause premature failure under repetitive surges; larger pads offer marginal improvement but require adherence to IPC-7351B SMA land patterns to maintain solder joint reliability.
How does P4SMA22CAHM3/H perform under repeated surge conditions?
P4SMA22CAHM3/H supports repetitive surges at 0.01 % duty cycle (e.g., one 10/1000 µs pulse per second). Derating applies above 25 °C ambient: power capability drops linearly to ~250 W at 85 °C ambient. Its glass-passivated junction ensures stable VBR and low leakage (<1 µA at 22 V) even after hundreds of rated pulses, as verified in AEC-Q101 stress testing.
P4SMA22CAHM3/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:
- -
- 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/H FAQ
1.How can I place an order for P4SMA22CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA22CAHM3/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 P4SMA22CAHM3/H reliable?
The price and inventory of P4SMA22CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA22CAHM3/H is usually 5 days.
3.What payment methods are accepted for P4SMA22CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA22CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA22CAHM3/H?
P4SMA22CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA22CAHM3/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 P4SMA22CAHM3/H?
For technical support, including P4SMA22CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA22CAHM3/H requirements.
6.How does Aetrix verify that P4SMA22CAHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA22CAHM3/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 P4SMA22CAHM3/H meets industry standards.
7.What is the process for return or replacement of P4SMA22CAHM3/H?
All P4SMA22CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA22CAHM3/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 P4SMA22CAHM3/H part is unused and in its original packaging.
Return procedure for P4SMA22CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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