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Vishay General Semiconductor - Diodes Division P4SMA22AHE3_A/H
- Part No.:
- P4SMA22AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA22AHE3_A/H.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA22AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for clamping inductive switching transients and ESD events on power and signal lines. It features a 22 V standoff voltage (VWM), 23.1 V maximum breakdown voltage (VBR), 30.6 V clamping voltage at 13.1 A peak pulse current, 400 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for automotive use.
For engineers reviewing the P4SMA22AHE3_A/H datasheet, P4SMA22AHE3_A/H pinout, P4SMA22AHE3_A/H application, or P4SMA22AHE3_A/H equivalent, key selection criteria include clamping performance under 10/1000 µs surge, thermal resistance (RθJA = 120 °C/W), unidirectional polarity with cathode band marking, and SMA (DO-214AC) package compatibility with automated SMT assembly.
Technical Context
The P4SMA22AHE3_A/H operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold to divert transient energy to ground. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at 18.8 V).
It delivers 400 W peak pulse power per 10/1000 µs waveform with 30.6 V clamping at 13.1 A, and supports repetitive surges at 0.01% duty cycle. Thermal performance is defined by RθJA = 120 °C/W and RθJL = 30 °C/W, enabling operation up to TJ = +150 °C with appropriate PCB copper pad layout (0.2" × 0.2").
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 breakdown. |
| VBR (Breakdown Voltage) | 20.9–23.1 V at 1 mA - Confirmed avalanche onset range; ensures predictable clamping initiation across temperature and unit variation. |
| VC (Clamping Voltage) | 30.6 V at IPPM = 13.1 A - Peak voltage seen by protected circuit during worst-case 10/1000 µs surge; directly limits stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 µs) - Surge energy-handling capacity; derates above 25 °C per Fig. 2, supporting robust protection in industrial environments. |
| IFSM (Surge Current) | 40 A (8.3 ms half-sine) - Forward surge rating confirms reliability during power-rail fault conditions without bond-wire failure. |
| TJ max | +150 °C - Maximum junction temperature; enables deployment in under-hood automotive and high-ambient industrial applications. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 5.28 mm length, 4.50 mm width, and 2.29 mm height; compatible with JEDEC MS-013. |
Pinout & Package
SMA (DO-214AC) package: two-terminal, unidirectional device with cathode band marking on the case. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102. Molding compound meets UL 94 V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to protected line (e.g., 12 V rail or sensor output); referenced to system ground via cathode path during clamping. |
| Cathode | Clamping return path / Ground reference | Connected to system ground plane; carries full transient current during avalanche conduction; requires low-inductance layout. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing-enables use in ADAS, body control, and infotainment modules. |
| 400 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge immunity without derating in standard PCB layouts. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients (e.g., ISO 7637-2 pulse 1/2a/5a), improving protection fidelity for sensitive microcontrollers. |
| MSL Level 1 (260 °C peak reflow) | Enables single-pass lead-free reflow assembly without moisture-related popcorn failure or delamination. |
| Glass passivated junction | Ensures stable VBR over lifetime and humidity exposure; eliminates risk of parametric shift due to surface contamination or oxidation. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails in engine control units (ECUs) against load dump and inductive switching spikes per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input to clamp transients before regulation stage. Use Value: Clamps to ≤30.6 V during 13.1 A surge, preventing overvoltage damage to 36 V-rated input stages and ensuring ASIL-B functional safety compliance. |
Use Scenario: Safeguarding analog outputs of pressure or temperature sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: TVS mounted at connector interface to shunt ESD (IEC 61000-4-2 ±8 kV contact) and cable discharge events. Use Value: Sub-31 V clamping preserves signal integrity of 0–10 V or 4–20 mA outputs and avoids latch-up in precision op-amps and ADC drivers. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Input Stage |
Use Scenario: Secondary-side transient suppression on 48 V PoE-powered line cards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on DC feed path to protect Ethernet PHYs and PMICs from common-mode transients coupled onto twisted pairs. Use Value: 400 W rating handles multi-pulse surges per GR-1089-CORE; 120 °C/W RθJA allows thermal stability on dense line card layouts. |
Use Scenario: Input-stage clamping in USB-C PD adapters subjected to mains-borne surges and hot-plug transients. IC Role / Device Role / Timing Role: Primary-side TVS between bridge rectifier output and bulk capacitor to limit voltage overshoot during AC line switching. Use Value: 22 V VWM provides margin above 17 V DC bus while enabling fast response (<1 ns) to sub-microsecond transients without crowbar action. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A-E3/52 (Vishay) | Same VWM/VBR/VC specs but SMB (DO-214AA) package; 50% larger footprint, lower RθJA (90 °C/W), higher IPPM (23.3 A). | Better thermal performance for high-duty-cycle surges; requires PCB redesign due to larger pad layout and 2.6 mm height vs. SMA's 2.29 mm. | Select when sustained surge repetition or tighter thermal budget demands lower junction rise; not drop-in compatible. |
| 1.5KE22A (ON Semiconductor) | Through-hole DO-201 package; same 22 V VWM but higher VC (35.5 V at 17.5 A); 1500 W peak power rating. | Higher clamping voltage increases stress on protected ICs; intended for chassis-level primary protection, not board-level secondary clamping. | Choose only for legacy through-hole designs or where higher peak power justifies trade-off in clamping performance and board space. |
Compared with SMBJ22A-E3/52 and 1.5KE22A, the P4SMA22AHE3_A/H offers optimal balance of compact SMA footprint, automotive qualification, and precise 30.6 V clamping-making it ideal for space-constrained, high-reliability SMT applications where controlled voltage limiting is critical.
Availability
P4SMA22AHE3_A/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom line cards, and consumer power adapters requiring stable component supply with AEC-Q101 traceability and RoHS compliance.
Supply support for P4SMA22AHE3_A/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series is engineered for high-speed transient suppression in automotive, industrial, and communications systems-delivering consistent clamping performance, AEC-Q101 validation, and surface-mount scalability across 6.8 V to 540 V standoff ranges.
FAQ
What is the clamping voltage of the P4SMA22AHE3_A/H at its rated peak pulse current?
The P4SMA22AHE3_A/H 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 is guaranteed across the full operating temperature range and represents the highest voltage the protected circuit will experience during a worst-case transient event. The P4SMA22AHE3_A/H maintains this clamping performance due to its low incremental surge resistance and stable avalanche characteristics.
Is the P4SMA22AHE3_A/H suitable for automotive applications?
Yes, the P4SMA22AHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix indicating RoHS-compliant and AEC-Q101-qualified construction. It undergoes rigorous stress testing-including temperature cycling, high-temperature reverse bias, and ESD-to ensure reliability in under-hood and cabin environments. The P4SMA22AHE3_A/H is deployed in ECUs, body controllers, and infotainment systems where transient immunity to ISO 7637-2 pulses is mandatory.
What does the "_A/H" suffix mean in P4SMA22AHE3_A/H?
The "_A/H" suffix in P4SMA22AHE3_A/H indicates revision level "A" and packaging in 7-inch plastic tape and reel (code "H") with a base quantity of 1800 units. Per Vishay's ordering documentation, "_A" denotes AEC-Q101 qualification for devices in the 6.8 V to 220 V range, and "H" specifies the 7" reel delivery format. The P4SMA22AHE3_A/H is not a variant with altered electrical specs-it retains identical VWM, VBR, VC, and PPPM ratings as the base P4SMA22AHE3 part.
How does the P4SMA22AHE3_A/H compare to bidirectional TVS diodes like P4SMA22CA?
The P4SMA22AHE3_A/H is unidirectional and features a cathode band for polarity identification, whereas P4SMA22CA is bidirectional with no polarity marking and symmetrical clamping in both directions. The P4SMA22AHE3_A/H offers lower leakage (<1 µA at 18.8 V) and is preferred for DC power rail protection, while P4SMA22CA suits AC signal lines or differential buses. They share identical VWM (18.8 V), VBR (20.9–23.1 V), and VC (30.6 V), but the P4SMA22AHE3_A/H cannot replace P4SMA22CA in circuits requiring bidirectional conduction.
What PCB layout guidance applies to the P4SMA22AHE3_A/H for optimal surge performance?
For optimal surge performance, the P4SMA22AHE3_A/H must be mounted on minimum recommended copper pads: 0.2" × 0.2" (5.0 mm × 5.0 mm) per terminal, per Vishay's datasheet Figure 1. Short, wide traces to ground minimize inductance and prevent voltage overshoot during fast transients. Avoid vias in the cathode path; use solid ground planes beneath the device. The P4SMA22AHE3_A/H's RθJA of 120 °C/W assumes this layout-reducing pad size degrades thermal performance and risks thermal runaway under repetitive surges.
P4SMA22AHE3_A/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:
- 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/H FAQ
1.How can I place an order for P4SMA22AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA22AHE3_A/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 P4SMA22AHE3_A/H reliable?
The price and inventory of P4SMA22AHE3_A/H 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/H is usually 5 days.
3.What payment methods are accepted for P4SMA22AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA22AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA22AHE3_A/H?
P4SMA22AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA22AHE3_A/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 P4SMA22AHE3_A/H?
For technical support, including P4SMA22AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA22AHE3_A/H requirements.
6.How does Aetrix verify that P4SMA22AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA22AHE3_A/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 P4SMA22AHE3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA22AHE3_A/H?
All P4SMA22AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA22AHE3_A/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 P4SMA22AHE3_A/H part is unused and in its original packaging.
Return procedure for P4SMA22AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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