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Vishay General Semiconductor - Diodes Division SMA5J22CA-E3/5A
- Part No.:
- SMA5J22CA-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J22CA-E3/5A.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,683
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Product details
Overview
SMA5J22CA-E3/5A from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on signal and power lines. It features a 22 V standoff voltage (VWM), 24.4–26.9 V breakdown voltage (VBR), 500 W peak pulse power (10/1000 μs), clamping voltage of 35.5 V at 14.1 A IPPM, and operates from –55 °C to +150 °C - used in automotive sensor interface protection and industrial I/O line hardening.
For engineers reviewing the SMA5J22CA-E3/5A datasheet, SMA5J22CA-E3/5A pinout, SMA5J22CA-E3/5A application, or SMA5J22CA-E3/5A equivalent, key selection criteria include bidirectional clamping capability, 500 W surge rating with low clamping ratio (VC/VBR ≈ 1.42), RoHS-compliant matte tin terminals, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device functions as a voltage-clamped crowbar during transients, leveraging an avalanche breakdown mechanism across both polarities. Its glass-passivated junction ensures stable VBR tolerance (±5 %), low incremental surge resistance, and fast response time (<1 ns), enabling effective suppression of ESD, lightning-induced surges, and inductive switching spikes.
Designed for surface-mount use in space-constrained environments, it delivers 500 W peak pulse power under standardized 10/1000 μs waveform conditions when mounted per recommended pad layout. Thermal resistance is 80 °C/W (junction-to-ambient) and 25 °C/W (junction-to-lead), supporting reliable operation up to TJ = 150 °C without derating below 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 24.4 V / 26.9 V - guaranteed avalanche onset range at 1 mA test current |
| VC @ IPPM | 35.5 V at 14.1 A - clamped voltage during 500 W transient, defining protected circuit stress level |
| PPPM | 500 W - peak surge power handling per 10/1000 μs waveform, critical for IEC 61000-4-5 compliance |
| ID @ VWM | 1.0 μA - leakage current at rated standoff, ensuring minimal standby power loss |
| TJ max | +150 °C - maximum junction temperature, enabling use in under-hood automotive and industrial enclosures |
| Package | SMA (DO-214AC) - industry-standard SMT outline with 5.28 mm × 4.50 mm footprint and 2.29 mm height |
Pinout & Package
Two-terminal bidirectional device in SMA (DO-214AC) package; no polarity marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, with MSL Level 1 rating (peak reflow 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (unmarked) | Bidirectional surge path | Either terminal serves as anode or cathode depending on transient polarity; symmetric clamping behavior |
| Case (cathode band absent) | Thermal and mechanical anchor | No electrical connection; provides mechanical stability and thermal conduction to PCB copper pads |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over lifetime and temperature, with ±5 % tolerance and low parameter drift |
| Low incremental surge resistance | Minimizes VC rise during high-current transients, improving clamping efficiency and system margin |
| MSL Level 1 rating | Enables standard Pb-free reflow without baking or special handling prior to assembly |
| AEC-Q101 qualification option | Available in HE3/HM3 variants for automotive-grade reliability; this E3/5A variant is commercial grade |
| UL 94 V-0 molding compound | Meets flammability safety requirements for enclosed industrial and consumer end equipment |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between signal line and ground, absorbing energy before it reaches sensitive input stages. Use Value: Limits transient voltage to ≤35.5 V, preventing damage to 3.3 V/5 V interface ICs while maintaining signal integrity during normal operation. | Use Scenario: Safeguarding digital input modules in programmable logic controllers against field-wiring surges and relay contact bounce. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor on 24 V DC input lines, shunting surge current away from optocoupler or microcontroller input pins. Use Value: Withstands repeated 500 W surges per IEC 61000-4-5 Level 4, extending system uptime and reducing field failure rates. |
| Telecom Line Interface | Consumer Power Adapter ESD Protection |
Use Scenario: Shielding Ethernet PHY interfaces and RS-485 transceivers from induced surges in building cabling and PoE ports. IC Role / Device Role / Timing Role: Secondary-level TVS on differential pairs, working with common-mode chokes to divert common-mode transients. Use Value: Clamps common-mode surges to <36 V while adding <1.5 pF capacitance at 0 V bias, preserving signal bandwidth up to 100 MHz. | Use Scenario: Protecting USB-C and barrel jack inputs in AC/DC adapters against user-handling ESD and mains-coupled noise. IC Role / Device Role / Timing Role: Input-stage surge limiter on primary-side DC bus, placed before rectifier output or post-regulator node. Use Value: Handles 30 kV HBM ESD per ANSI/IEEE C62.35, with <1 μA leakage at 22 V to avoid battery drain in always-on designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J22A-E3/5A | Unidirectional; same VWM/VBR/PPPM but asymmetric conduction - conducts only in reverse direction | Requires correct polarity placement; unsuitable for AC or bidirectional signal lines | Select only if protecting DC rails where polarity is fixed and forward conduction must be blocked |
| SMCJ22CA | Same VWM/VBR/VC specs but in larger SMC (DO-214AB) package; 1500 W PPPM rating | Higher surge capacity but 2× PCB area; requires larger pad layout and thermal mass | Choose when system-level surge testing exceeds 500 W or when legacy SMC footprint is locked |
Compared with SMA5J22CA-E3/5A, the unidirectional SMA5J22A-E3/5A offers identical clamping performance but mandates polarity-aware layout, while the SMCJ22CA trades compactness for higher surge robustness - making SMA5J22CA-E3/5A optimal for space-constrained bidirectional protection at 500 W duty.
Availability
SMA5J22CA-E3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line interfaces, and consumer power adapter designs requiring stable component supply and RoHS-compliant SMT TVS solutions.
Supply support for SMA5J22CA-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, power density, and automotive qualification.
The SMA5J series is engineered for high-power-density transient suppression in compact SMT formats, targeting cost-sensitive yet robust protection needs in automotive, industrial, and communications infrastructure.
FAQ
What is the clamping voltage of the SMA5J22CA-E3/5A and how is it measured?
The SMA5J22CA-E3/5A has a maximum clamping voltage (VC) of 35.5 V, measured at its peak pulse current (IPPM) of 14.1 A under standardized 10/1000 μs waveform conditions. This value reflects the actual voltage seen by downstream circuitry during a surge event and is guaranteed across temperature and production lot. The SMA5J22CA-E3/5A achieves this with low incremental surge resistance, ensuring predictable protection margins in real-world applications.
Is the SMA5J22CA-E3/5A suitable for automotive applications?
The SMA5J22CA-E3/5A is RoHS-compliant and qualified to MSL Level 1, but it is not AEC-Q101 certified in this E3/5A configuration. For automotive use, Vishay offers the SMA5J22CAHE3_A variant (suffix HE3), which adds AEC-Q101 qualification. The SMA5J22CA-E3/5A remains appropriate for non-safety-critical automotive subsystems where commercial-grade reliability suffices, such as infotainment power rails or body control module peripherals.
How does the bidirectional design of SMA5J22CA-E3/5A affect circuit layout?
The SMA5J22CA-E3/5A has no polarity marking and functions identically in both directions, eliminating orientation concerns during placement. Unlike unidirectional variants (e.g., SMA5J22A-E3/5A), it requires no attention to cathode band alignment, simplifying pick-and-place programming and reducing assembly errors. This symmetry makes SMA5J22CA-E3/5A ideal for AC-coupled lines, differential buses, and any application where voltage polarity may reverse during transients.
What is the thermal resistance of the SMA5J22CA-E3/5A and how does it impact PCB design?
The SMA5J22CA-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W and junction-to-lead (RθJL) of 25 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain TJ ≤ 150 °C under repetitive surges, designers must ensure adequate copper area and minimize trace length to ground planes. The SMA5J22CA-E3/5A's low RθJL supports efficient heat transfer through solder joints into internal layers.
Can the SMA5J22CA-E3/5A replace older SMAJ or SMBJ series TVS diodes?
The SMA5J22CA-E3/5A is not a direct drop-in replacement for SMAJ or SMBJ series due to differences in surge rating (500 W vs. 400 W for SMAJ22CA, 600 W for SMBJ22CA) and package dimensions (SMA vs. SMA/DO-214AC vs. SMB/DO-214AA). While electrically compatible in many cases, layout verification is required. The SMA5J22CA-E3/5A offers improved power density and tighter VBR tolerance than SMAJ, but SMBJ provides higher surge capacity - confirm system-level test compliance before substitution.
SMA5J22CA-E3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 14.1A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J22CA-E3/5A FAQ
1.How can I place an order for SMA5J22CA-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J22CA-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 SMA5J22CA-E3/5A reliable?
The price and inventory of SMA5J22CA-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 SMA5J22CA-E3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J22CA-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J22CA-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J22CA-E3/5A?
SMA5J22CA-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J22CA-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 SMA5J22CA-E3/5A?
For technical support, including SMA5J22CA-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J22CA-E3/5A requirements.
6.How does Aetrix verify that SMA5J22CA-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J22CA-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 SMA5J22CA-E3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J22CA-E3/5A?
All SMA5J22CA-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J22CA-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 SMA5J22CA-E3/5A part is unused and in its original packaging.
Return procedure for SMA5J22CA-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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