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Vishay General Semiconductor - Diodes Division P4SMA22AHE3_A/I
- Part No.:
- P4SMA22AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA22AHE3_A/I.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,392
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Product details
Overview
P4SMA22AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping transient overvoltages 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 (10/1000 µs waveform). It is AEC-Q101 qualified and used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial electronics.
For engineers reviewing the P4SMA22AHE3_A/I datasheet, P4SMA22AHE3_A/I pinout, P4SMA22AHE3_A/I application, or P4SMA22AHE3_A/I equivalent, key selection criteria include unidirectional polarity, 18.8 V working voltage margin, 30.6 V clamping performance under 13.1 A surge, AEC-Q101 qualification status, and SMA package thermal resistance (RθJA = 120 °C/W).
Technical Context
The P4SMA22AHE3_A/I operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold (20.9–23.1 V), with fast response time (<1 ns) and low incremental surge resistance enabling effective suppression of ESD and inductive switching transients. Its glass-passivated junction ensures stable leakage and long-term reliability under repetitive surge stress.
Designed for surface-mount assembly on standard 0.2" × 0.2" copper pads, it delivers 400 W peak pulse power (derated above 25 °C per Fig. 2) and supports 40 A non-repetitive forward surge current (8.3 ms half-sine). It meets J-STD-020 MSL Level 1 and is rated for operation from –65 °C to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1 mA - defines precise avalanche initiation range for predictable clamping onset |
| VWM | 18.8 V - maximum continuous reverse voltage before significant leakage; sets safe operating margin below VBR |
| VC @ IPPM | 30.6 V at 13.1 A - clamped voltage during 400 W transient, limiting downstream device stress |
| IPPM | 13.1 A (10/1000 µs waveform) - peak surge current capability under standardized test condition |
| PPPM | 400 W - peak pulse power handling capacity; derates linearly above 25 °C ambient |
| TJ max | +150 °C - maximum junction temperature; enables use in under-hood automotive environments |
| RθJA | 120 °C/W - thermal resistance from junction to ambient; informs PCB pad layout and power derating |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional configuration with cathode band marking. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); matte tin-plated leads, J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS placement |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 24 V rail or signal input); band denotes cathode end |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and surge endurance |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage (<1 µA at VWM) across lifetime and temperature |
| 400 W peak pulse power | Withstands high-energy transients from inductive load switching (e.g., solenoid drivers, motor controllers) |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak without preconditioning |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes overvoltage overshoot during clamping, reducing risk to downstream logic-level ICs |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply rails in engine control units (ECUs) against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between rail and chassis ground to clamp surges above 18.8 V. Use Value: Limits rail voltage to ≤30.6 V during 13.1 A transients, preventing damage to 36 V-rated DC-DC converters and microcontrollers. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors interfacing with PLC analog inputs. IC Role / Device Role / Timing Role: TVS mounted at sensor connector to suppress ESD and cable-induced transients on 0–10 V or 4–20 mA lines. Use Value: Clamps fast transients (<1 ns rise) while maintaining <1 µA leakage at 18.8 V, preserving signal accuracy and offset stability. |
| Consumer Appliance Motor Driver Protection | Telecom Power Interface Protection |
|
Use Scenario: Shielding H-bridge gate drivers in washing machine motor control boards from back-EMF spikes. IC Role / Device Role / Timing Role: Unidirectional TVS on low-side FET source node to absorb inductive kickback during PWM turn-off. Use Value: Withstands 400 W pulses without degradation, enabling robust operation under repeated 40 A surge conditions (IFSM). |
Use Scenario: Guarding PoE-powered Ethernet switch ports against lightning-induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary clamping device on DC input rail upstream of DC-DC converter and isolation circuitry. Use Value: Provides 30.6 V clamping at 13.1 A with 120 °C/W thermal resistance, allowing compact layout on telecom board space-constrained designs. |
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 VWM (18.8 V), identical SMA package, but rated for 400 W with 10/1000 µs waveform and no AEC-Q101 qualification | Commercial-grade only; not validated for automotive temperature cycling or humidity bias testing | Select when AEC-Q101 is not required and cost sensitivity outweighs automotive reliability validation |
| 1.5SMC22A | Higher package thermal resistance (RθJA ≈ 150 °C/W), larger SMC (DO-214AB) footprint, same VBR/VC specs | Requires larger PCB area and exhibits greater thermal derating at elevated ambient temperatures | Choose only if existing design uses SMC footprint and board rework is impractical |
Compared with SMAJ22A-E3/5A and 1.5SMC22A, the P4SMA22AHE3_A/I offers verified AEC-Q101 compliance and optimized thermal performance in the smaller SMA outline-critical for space-constrained automotive modules where reliability under thermal cycling and humidity stress must be guaranteed.
Availability
P4SMA22AHE3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, consumer appliance motor controllers, and telecom PoE power inputs requiring stable component supply with full traceability and AEC-Q101 assurance.
Supply support for P4SMA22AHE3_A/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 protection devices with emphasis on reliability, efficiency, and automotive-grade qualification.
The P4SMA Series targets surface-mount transient suppression in space-constrained, high-reliability applications-including automotive, industrial, and telecom-where consistent clamping, low leakage, and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of the P4SMA22AHE3_A/I under maximum surge conditions?
The P4SMA22AHE3_A/I clamps to 30.6 V when subjected to its rated peak pulse current of 13.1 A (10/1000 µs waveform). This value is measured per standard test conditions and reflects the maximum voltage seen by downstream circuitry during transient events. The clamping voltage remains stable across temperature due to the device's low temperature coefficient of VBR (0.092 %/°C), ensuring predictable protection in automotive under-hood environments where the P4SMA22AHE3_A/I is commonly deployed.
Is the P4SMA22AHE3_A/I suitable for bidirectional transient suppression?
No, the P4SMA22AHE3_A/I is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. It conducts only in reverse bias above its breakdown voltage and blocks forward current like a standard diode. For bidirectional protection, Vishay offers the P4SMA22CA variant (with "CA" suffix), which has symmetrical clamping in both polarities. Using the P4SMA22AHE3_A/I in a bidirectional configuration would result in unintended forward conduction and failure to suppress positive transients.
What does the "HE3_A/I" suffix in P4SMA22AHE3_A/I signify?
The "HE3" denotes RoHS-compliant construction with AEC-Q101 qualification; "A" indicates the revision level per Vishay's internal documentation; and "I" specifies packaging in 13-inch tape-and-reel format with 7500 units per reel. This ordering code confirms the P4SMA22AHE3_A/I meets automotive reliability standards and ships in high-volume production-ready packaging-distinct from commercial-grade "E3" or halogen-free "HM3" variants.
How does the thermal resistance of the P4SMA22AHE3_A/I affect PCB layout?
The P4SMA22AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads. To maintain safe junction temperature under sustained power dissipation, designers must allocate adequate copper area and avoid routing heat-sensitive components nearby. Derating curves in the datasheet require reducing peak pulse power above 25 °C ambient-so the P4SMA22AHE3_A/I's thermal performance directly dictates pad size, airflow, and proximity to other heat sources in the final layout.
Can the P4SMA22AHE3_A/I replace older P4KE22A through-hole TVS diodes?
The P4SMA22AHE3_A/I provides equivalent electrical performance (VWM = 18.8 V, VC = 30.6 V, PPPM = 400 W) to the through-hole P4KE22A but in an SMA surface-mount package. However, direct replacement requires PCB redesign due to different footprint, thermal path, and mounting method. The P4SMA22AHE3_A/I offers superior automated assembly compatibility and smaller board area, but its lower RθJA (120 °C/W vs. ~65 °C/W for P4KE22A on large heatsink) means thermal management must be re-evaluated in the new layout to ensure the P4SMA22AHE3_A/I remains within its +150 °C TJ limit.
P4SMA22AHE3_A/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:
- 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):
- 13.1A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA22AHE3_A/I FAQ
1.How can I place an order for P4SMA22AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA22AHE3_A/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 P4SMA22AHE3_A/I reliable?
The price and inventory of P4SMA22AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA22AHE3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA22AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA22AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA22AHE3_A/I?
P4SMA22AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA22AHE3_A/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 P4SMA22AHE3_A/I?
For technical support, including P4SMA22AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA22AHE3_A/I requirements.
6.How does Aetrix verify that P4SMA22AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA22AHE3_A/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 P4SMA22AHE3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA22AHE3_A/I?
All P4SMA22AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA22AHE3_A/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 P4SMA22AHE3_A/I part is unused and in its original packaging.
Return procedure for P4SMA22AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA22AHE3_A/I Tags
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