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Vishay General Semiconductor - Diodes Division P4SMA22A-E3/5A
- Part No.:
- P4SMA22A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA22A-E3/5A.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA22A-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for clamping inductive switching surges and ESD events on power and signal lines. It features a 22 V standoff voltage (VWM), 20.9–23.1 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 - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line receivers.
For engineers reviewing the P4SMA22A-E3/5A datasheet, P4SMA22A-E3/5A pinout, P4SMA22A-E3/5A application, or P4SMA22A-E3/5A equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, thermal derating above 25 °C ambient, unidirectional polarity marking (cathode band), and compatibility with automated SMT placement on DO-214AC footprint.
Technical Context
The P4SMA22A-E3/5A operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its specified breakdown range. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 µA at 18.8 V), while MSL Level 1 rating confirms suitability for standard reflow without moisture sensitivity concerns.
It delivers 400 W peak pulse power under 10/1000 µs waveform with 30.6 V clamping at 13.1 A, enabling robust protection of 3.3 V, 5 V, and 24 V rails. Thermal resistance is 120 °C/W junction-to-ambient (on recommended 5.0 mm × 5.0 mm copper pads), limiting continuous power dissipation to 3.3 W at 50 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 18.8 V - Maximum continuous reverse voltage before significant leakage; sets upper limit for protected circuit operating voltage. |
| VBR (Breakdown Voltage) | 20.9–23.1 V at 1 mA - Confirmed avalanche onset range; defines minimum overvoltage threshold for clamping activation. |
| VC (Clamping Voltage) | 30.6 V at 13.1 A IPPM - Peak voltage seen by downstream circuit during 10/1000 µs surge; must stay below IC's absolute max rating. |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy absorption capability under standardized transient; validates protection against IEC 61000-4-5 Level 3 surges. |
| Package | SMA (DO-214AC) - Surface-mount package with 5.28 mm length, 3.99 mm width, and cathode band marking; compatible with J-STD-020 reflow profile. |
| TJ max | 150 °C - Maximum junction temperature; requires thermal design consideration for sustained surge duty cycles or high ambient environments. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on standard pad layout; determines allowable power dissipation at given ambient temperature. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional configuration with cathode indicated by a visible band on the body. Dimensions: 5.28 mm × 3.99 mm × 2.29 mm (L × W × H); matte tin-plated leads, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path) in unidirectional TVS configuration. |
| Cathode | Avalanche clamping terminal | Marked with band; connected to protected line (e.g., 24 V rail or RS-485 A/B) to clamp positive transients to ground. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Validates compliance with IEC 61000-4-5 surge immunity requirements for industrial and automotive electronics. |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes overvoltage stress on protected ICs - critical for safeguarding 3.3 V microcontrollers and CAN transceivers. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow without baking or special handling; reduces manufacturing complexity. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage performance across temperature and lifetime stress conditions. |
| AEC-Q101 qualified option available | Supports automotive-grade reliability validation (though P4SMA22A-E3/5A is commercial grade; HE3 suffix required for AEC-Q101). |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting analog front-end circuits of engine control unit (ECU) pressure sensors from load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor supply line and chassis ground to clamp transients before reaching op-amp input stage. Use Value: Limits voltage excursion to ≤30.6 V during 13.1 A surge, preserving sensor accuracy and preventing latch-up in 5 V supply domain. |
Use Scenario: Shielding 24 V digital input channels of programmable logic controllers from field wiring surges and relay contact bounce. IC Role / Device Role / Timing Role: Standoff-clamp device mounted at connector entry point to shunt fast transients (<100 ns rise time) to common ground. Use Value: Withstands repetitive 400 W pulses without degradation, ensuring >10-year field reliability in factory automation environments. |
| Telecom Line Receiver Protection | Consumer Appliance Motor Drive Feedback Protection |
Use Scenario: Safeguarding RS-485 transceiver inputs in base station backhaul equipment exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary clamping element on differential bus lines (A/B), coordinated with common-mode chokes and secondary TVS. Use Value: 30.6 V clamping ensures transceiver remains within ±12 V common-mode range while absorbing up to 13.1 A peak current. |
Use Scenario: Suppressing commutation spikes on Hall-effect position feedback lines in BLDC motor drives used in HVAC compressors. IC Role / Device Role / Timing Role: Fast-response unidirectional suppressor placed at microcontroller GPIO input to prevent false triggering or damage. Use Value: Sub-1 ns response time and 1.0 µA leakage at 18.8 V preserve signal integrity and minimize quiescent current in battery-backed systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A | Same VWM (18.8 V) and VC (30.6 V), but SMB package (DO-214AA) - 50 % larger footprint, higher RθJA (100 °C/W vs. 120 °C/W). | Better thermal performance on minimal copper; preferred where board space allows larger pad area and higher surge repetition rate is needed. | Select SMBJ22A when PCB layout permits larger footprint and thermal management prioritizes lower junction temperature rise. |
| 1.5SMC22A | Same electrical specs, but SMC (DO-214AB) package - 7.1 mm × 6.2 mm, 1.5 kW peak power rating, higher IPPM (32.4 A), RθJA = 65 °C/W. | Higher energy handling for infrequent high-energy surges (e.g., AC mains coupling); not suitable for dense SMT layouts. | Choose 1.5SMC22A only for legacy designs requiring higher surge margin and where SMC footprint is already allocated. |
Compared with SMBJ22A and 1.5SMC22A, the P4SMA22A-E3/5A offers optimal balance of compact DO-214AC size, automated placement compatibility, and verified 400 W surge capability - making it ideal for space-constrained industrial and automotive modules where consistent SMT yield and JEDEC-compliant reflow are mandatory.
Availability
P4SMA22A-E3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC inputs, telecom line receivers, and consumer appliance motor feedback circuits requiring stable component supply, RoHS-compliant materials, and traceable lot-level sourcing.
Supply support for P4SMA22A-E3/5A 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, precision, and application-specific optimization.
The P4SMA series is engineered for surface-mount transient suppression in cost-sensitive, high-volume applications - delivering consistent clamping performance, automated assembly readiness, and broad voltage coverage from 6.8 V to 540 V.
FAQ
What is the maximum clamping voltage of the P4SMA22A-E3/5A under standard test conditions?
The P4SMA22A-E3/5A has a maximum clamping voltage (VC) of 30.6 V when subjected to a 10/1000 µs waveform with a peak pulse current (IPPM) of 13.1 A. This value is measured at TA = 25 °C on standard 5.0 mm × 5.0 mm copper pads and represents the highest voltage the protected circuit will experience during such a transient event. The P4SMA22A-E3/5A maintains this clamping performance across its rated operating temperature range.
Is the P4SMA22A-E3/5A suitable for automotive applications requiring AEC-Q101 qualification?
No, the P4SMA22A-E3/5A is a commercial-grade part with RoHS compliance (E3 suffix) but not AEC-Q101 qualified. For automotive use, Vishay specifies the P4SMA22AHE3_A variant (HE3 suffix), which undergoes additional stress testing per AEC-Q101. The P4SMA22A-E3/5A may be used in non-safety-critical automotive subsystems only after full system-level validation, but it does not carry the AEC-Q101 certification required for qualified automotive components.
How does the P4SMA22A-E3/5A differ from bidirectional variants like P4SMA22CA?
The P4SMA22A-E3/5A is unidirectional and conducts only in reverse bias above VBR, with polarity marked by a cathode band. In contrast, P4SMA22CA is bidirectional - symmetric in both directions, with no polarity marking and identical VBR in forward and reverse. The P4SMA22A-E3/5A is intended for DC line protection (e.g., +24 V to GND), while P4SMA22CA suits AC or differential signal lines (e.g., RS-485). Their electrical specs (VWM, VBR, VC) differ accordingly.
What is the thermal resistance and how does it affect PCB layout for the P4SMA22A-E3/5A?
The P4SMA22A-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This means each watt of power dissipated raises the junction temperature by 120 °C above ambient. To maintain safe operation, PCB layout must allocate sufficient copper area and avoid thermal isolation - especially important during repetitive surge events or elevated ambient temperatures. The P4SMA22A-E3/5A relies on this pad layout to achieve its rated 400 W pulse power.
Can the P4SMA22A-E3/5A be used in parallel to increase surge current handling?
No - the P4SMA22A-E3/5A should not be paralleled without external balancing components. Due to VBR tolerances (±5%), mismatched avalanche onset causes one device to conduct most of the surge current, risking thermal runaway. Vishay does not characterize or recommend parallel operation for the P4SMA22A-E3/5A. For higher current handling, select a single higher-rated device (e.g., SMBJ22A or 1.5SMC22A) instead of attempting parallel P4SMA22A-E3/5A units.
P4SMA22A-E3/5A 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA22A-E3/5A FAQ
1.How can I place an order for P4SMA22A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA22A-E3/5A 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 P4SMA22A-E3/5A reliable?
The price and inventory of P4SMA22A-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA22A-E3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA22A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA22A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA22A-E3/5A?
P4SMA22A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA22A-E3/5A 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 P4SMA22A-E3/5A?
For technical support, including P4SMA22A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA22A-E3/5A requirements.
6.How does Aetrix verify that P4SMA22A-E3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA22A-E3/5A 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 P4SMA22A-E3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA22A-E3/5A?
All P4SMA22A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA22A-E3/5A, 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 P4SMA22A-E3/5A part is unused and in its original packaging.
Return procedure for P4SMA22A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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