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Vishay General Semiconductor - Diodes Division SMAJ22CA-E3/61
- Part No.:
- SMAJ22CA-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ22CA-E3/61.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,289
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Product details
Overview
SMAJ22CA-E3/61 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection on signal and power lines. It features a 22 V standoff voltage (VWM), 24.4–26.9 V breakdown range at 1 mA, clamps transients to ≤35.5 V at 11.3 A peak pulse current, and delivers 400 W peak pulse power (10/1000 μs waveform). It is widely deployed in automotive sensor interfaces and industrial I/O protection circuits.
For engineers reviewing the SMAJ22CA-E3/61 datasheet, SMAJ22CA-E3/61 pinout, SMAJ22CA-E3/61 application, or SMAJ22CA-E3/61 equivalent, key selection criteria include bidirectional clamping capability, low clamping voltage under surge, AEC-Q101 qualification eligibility, and compatibility with automated SMT assembly on DO-214AC footprint.
Technical Context
This TVS diode operates symmetrically in both directions, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and fast response (<1 ns) to ESD and lightning-induced transients.
The device uses a planar silicon avalanche structure optimized for low dynamic impedance and minimal clamping overshoot. Thermal resistance is specified at RθJA = 120 °C/W (on 0.2" × 0.2" copper pads), supporting reliable operation up to TJ = 150 °C in compact layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR min/max | 24.4 V / 26.9 V at 1 mA - Confirmed breakdown window ensures predictable turn-on across production lots and temperature. |
| VC @ IPPM | ≤35.5 V at 11.3 A - Clamping voltage limits downstream IC stress during 400 W transient events (10/1000 μs). |
| IPPM | 11.3 A - Peak surge current handling capacity under standard test waveform; directly tied to PCB pad thermal design. |
| PPPM | 400 W - Peak pulse power rating per JEDEC-standard 10/1000 μs waveform; derates above 78 V to 300 W. |
| Package | SMA (DO-214AC) - Industry-standard surface-mount outline with 5.28 mm length, 4.50 mm width, and 2.29 mm height; supports high-volume pick-and-place. |
| TJ max | +150 °C - Maximum junction temperature enables use in under-hood automotive and industrial environments. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; meets UL 94 V-0 and J-STD-020 MSL Level 1 (peak reflow 260 °C). Bidirectional construction means no polarity marking - both terminals are electrically symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Both terminals serve as interchangeable surge current entry/exit points; no cathode band marking required for bidirectional types. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables protection against severe ISO 7637-2 Load Dump and IEC 61000-4-5 surge events in automotive and industrial systems. |
| Low clamping voltage (≤35.5 V) | Reduces voltage stress on downstream 24 V-rated interface ICs such as CAN transceivers and analog front-ends. |
| AEC-Q101 qualification option | Available in HE3/HM3 variants - supports automotive-grade reliability requirements including temperature cycling and HTRB testing. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; simplifies manufacturing logistics for high-mix SMT lines. |
| Glass passivated junction | Improves long-term stability of VBR and leakage performance across humidity and thermal cycling conditions. |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting LIN bus and pressure/temperature sensor outputs from load dump and ESD in engine control modules. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between sensor output line and ground, absorbing transients before they reach MCU ADC input or signal conditioner. Use Value: Maintains signal integrity by limiting induced voltage to ≤35.5 V, preventing latch-up or damage to 3.3 V/5 V analog front-end circuitry. |
Use Scenario: Shielding 4–20 mA current loop inputs in programmable logic controllers from field wiring surges and ground potential differences. IC Role / Device Role / Timing Role: Primary overvoltage protection element installed at terminal block entry point, shunting surge energy away from precision op-amp and DAC stages. Use Value: Withstands repetitive 400 W transients while maintaining <1 μA leakage at 22 V, ensuring minimal impact on loop accuracy and zero-point calibration. |
| Telecom Line Card Protection | Consumer Appliance Motor Control |
Use Scenario: Safeguarding Ethernet PHY interface lines (e.g., MDI-X pairs) against lightning-induced surges in outdoor network equipment. IC Role / Device Role / Timing Role: Secondary-level TVS mounted adjacent to RJ45 connector, working in coordination with common-mode chokes and primary GDTs. Use Value: Fast sub-nanosecond response and symmetrical clamping ensure balanced differential protection without skew or common-mode injection. |
Use Scenario: Suppressing inductive kickback from brushed DC motors in washing machine control boards during commutation switching. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals to clamp flyback voltage spikes generated by MOSFET H-bridge switching. Use Value: 40 A IFSM rating allows survival of repeated motor stall currents; 22 V VWM avoids false triggering during normal 24 V supply ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/61 | Unidirectional version; includes cathode band marking and forward voltage drop (~3.5 V @ 25 A). | Required only where polarity-aware protection is needed (e.g., DC power rail with defined ground reference). | Select SMAJ22A-E3/61 if protecting a unidirectional supply line; otherwise SMAJ22CA-E3/61 provides broader flexibility for AC or floating signals. |
| SMBJ22CA-E3/52 | Same VWM/VC specs but in SMB (DO-214AA) package - 30 % larger footprint and higher thermal mass (RθJA = 80 °C/W). | Better suited for higher average power dissipation or less dense board layouts where space permits. | Choose SMBJ22CA-E3/52 when thermal budget is constrained and PCB real estate allows larger package; SMAJ22CA-E3/61 prioritizes miniaturization. |
Compared with SMAJ22A-E3/61 and SMBJ22CA-E3/52, SMAJ22CA-E3/61 uniquely balances compact DO-214AC packaging, bidirectional symmetry, and automotive-grade process options - making it optimal for space-constrained, polarity-agnostic protection in sensor and interface circuits.
Availability
SMAJ22CA-E3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC analog inputs, telecom line card protection, and consumer appliance motor control requiring stable component supply and consistent surge performance.
Supply support for SMAJ22CA-E3/61 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 application-specific optimization.
The SMAJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, consistency, and AEC-Q101 compliance are critical.
FAQ
What does the "CA" suffix indicate in SMAJ22CA-E3/61?
The "CA" suffix denotes that SMAJ22CA-E3/61 is a bidirectional Transient Voltage Suppressor. Unlike unidirectional variants (e.g., SMAJ22A), it conducts identically in both directions - eliminating polarity concerns during placement and enabling protection of AC-coupled or differential signal paths without orientation constraints.
Is SMAJ22CA-E3/61 qualified for automotive applications?
SMAJ22CA-E3/61 itself is commercial-grade (E3 suffix), but Vishay offers AEC-Q101-qualified versions under ordering codes like SMAJ22CAHE3_A/H. These variants undergo extended reliability testing including temperature cycling, HTRB, and ESD - confirming suitability for automotive under-hood and body electronics when explicitly ordered with HE3 or HM3 suffixes.
What is the maximum clamping voltage of SMAJ22CA-E3/61 under surge conditions?
The maximum clamping voltage (VC) of SMAJ22CA-E3/61 is 35.5 V at its rated peak pulse current of 11.3 A (10/1000 μs waveform). This value is guaranteed across temperature and production lot variations, ensuring predictable protection margins for downstream 24 V-rated components.
How does the SMA (DO-214AC) package of SMAJ22CA-E3/61 compare to SMB (DO-214AA)?
The SMA package used by SMAJ22CA-E3/61 measures 4.50 mm × 2.29 mm - significantly smaller than the SMB (DO-214AA) footprint. While SMA offers superior board-space efficiency, its thermal resistance (RθJA = 120 °C/W) is higher than SMB's (80 °C/W), meaning SMBJ22CA-E3/52 may be preferred in thermally demanding, high-duty-cycle applications.
Can SMAJ22CA-E3/61 replace SMAJ22A-E3/61 in an existing design?
SMAJ22CA-E3/61 can replace SMAJ22A-E3/61 only if the circuit does not rely on unidirectional conduction - for example, if the protected node is referenced to a fixed ground and requires forward voltage blocking. Since SMAJ22CA-E3/61 lacks polarity marking and conducts in both directions, verify signal path symmetry before substitution to avoid unintended conduction paths.
SMAJ22CA-E3/61 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):
- 11.3A
- Power - Peak Pulse:
- 400W
- 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)
SMAJ22CA-E3/61 FAQ
1.How can I place an order for SMAJ22CA-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ22CA-E3/61 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 SMAJ22CA-E3/61 reliable?
The price and inventory of SMAJ22CA-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ22CA-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ22CA-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ22CA-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ22CA-E3/61?
SMAJ22CA-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ22CA-E3/61 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 SMAJ22CA-E3/61?
For technical support, including SMAJ22CA-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ22CA-E3/61 requirements.
6.How does Aetrix verify that SMAJ22CA-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ22CA-E3/61 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 SMAJ22CA-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ22CA-E3/61?
All SMAJ22CA-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ22CA-E3/61, 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 SMAJ22CA-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ22CA-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ22CA-E3/61 Tags
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