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Vishay General Semiconductor - Diodes Division SMAJ11CA-M3/61
- Part No.:
- SMAJ11CA-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ11CA-M3/61.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,120
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Product details
Overview
SMAJ11CA-M3/61 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal or power lines. It features a 11 V stand-off voltage (VWM), 12.2–13.5 V breakdown voltage (VBR) at 1 mA, and clamps to ≤18.2 V at 22 A peak pulse current (IPPM) under 10/1000 μs waveform. It delivers 400 W peak pulse power and is rated for automotive-grade reliability with halogen-free, RoHS-compliant construction.
For engineers reviewing the SMAJ11CA-M3/61 datasheet, SMAJ11CA-M3/61 pinout, SMAJ11CA-M3/61 application, or SMAJ11CA-M3/61 equivalent, this device is selected for robust ESD and surge protection in low-voltage sensor interfaces, automotive control modules, and industrial I/O circuits where bidirectional clamping, fast response (<1 ns), and MSL Level 1 reflow compatibility are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR, VWM, and clamping characteristics in forward and reverse directions. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and low incremental surge resistance, enabling precise voltage limiting during transient events.
The device is optimized for transient suppression per IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive load dump), delivering consistent clamping performance up to 150 °C junction temperature and meeting AEC-Q101 qualification when ordered with HE3/HM3 suffixes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 11 V - Maximum continuous reverse voltage before significant conduction begins; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 12.2–13.5 V at 1 mA - Voltage at which device enters avalanche conduction; ensures reliable triggering above normal operating voltage. |
| VC (Clamping Voltage) | ≤18.2 V at 22 A (10/1000 μs) - Peak voltage seen by protected circuit during surge; limits stress on downstream ICs like microcontrollers or transceivers. |
| PPPM (Peak Pulse Power) | 400 W - Sustains high-energy transients without failure; derates to 300 W above 78 V, but SMAJ11CA-M3/61 maintains full rating. |
| IPPM (Peak Pulse Current) | 22 A - Maximum non-repetitive surge current it can divert; enables protection against 10/1000 μs lightning-induced surges. |
| Junction Temperature Range | −55 °C to +150 °C - Supports operation in under-hood automotive, industrial control, and outdoor equipment environments. |
| Package | SMA (DO-214AC) - Surface-mount footprint with 5.0 mm × 5.0 mm copper pad thermal design; MSL Level 1, 260 °C reflow compatible. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads. Bidirectional configuration has no polarity marking; terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Both terminals serve as bidirectional surge conduction paths; no cathode band marking; PCB layout requires no orientation alignment. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions-enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| 400 W peak pulse power | Handles high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) without degradation-supports long-term reliability in automotive power line protection. |
| Low clamping ratio (VC/VWM ≈ 1.65) | Minimizes overvoltage stress on protected ICs-critical for safeguarding 3.3 V or 5 V logic interfaces with tight voltage margins. |
| Halogen-free & RoHS-compliant (M3 suffix) | Fulfills environmental compliance for global industrial and automotive supply chains while maintaining thermal and electrical performance equivalence to E3 variants. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profiles up to 260 °C-eliminates baking requirements and simplifies SMT manufacturing. |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and temperature/pressure sensor signal lines from load dump and ESD events in engine control units. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed at connector entry point, shunting transients before they reach signal conditioning amplifiers or microcontroller ADC inputs. Use Value: Limits induced surge voltage to ≤18.2 V, preventing latch-up or gate oxide damage in 5 V-tolerant analog front-end ICs while supporting AEC-Q101 system-level validation. |
Use Scenario: Shielding 4–20 mA current loop inputs in programmable logic controllers from field wiring surges and electrostatic discharge during maintenance. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input terminals, operating in parallel with precision shunt regulators and op-amp buffers. Use Value: Maintains <1.0 μA leakage at 11 V stand-off, avoiding measurement error in high-impedance current sensing paths while clamping 22 A transients within 1 ns response time. |
| Consumer USB Data Line | Telecom Ethernet PHY Port |
|
Use Scenario: ESD protection for USB 2.0 D+/D− lines in portable audio devices and smart home hubs exposed to human-body-model (HBM) discharges. IC Role / Device Role / Timing Role: Low-capacitance bidirectional suppressor placed adjacent to USB connector, minimizing signal integrity impact. Use Value: Delivers <100 pF typical junction capacitance at VWM, preserving signal rise/fall times while meeting IEC 61000-4-2 ±15 kV air/±8 kV contact discharge requirements. |
Use Scenario: Secondary surge protection on 10/100BASE-TX Ethernet PHY differential pairs in network switches and VoIP gateways. IC Role / Device Role / Timing Role: Coordinated clamping stage downstream of gas discharge tube (GDT) primary protectors, handling residual energy after GDT firing. Use Value: Clamps residual transients to ≤18.2 V within nanoseconds, protecting PHY transceivers rated for 2.5 V core and 3.3 V I/O rails without compromising data eye integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A-M3/61 | Unidirectional variant; same VWM, VBR, and VC, but conducts only in reverse direction; includes cathode band marking. | Required where DC-biased lines (e.g., 5 V power rail) need asymmetric clamping; unsuitable for AC or floating signals. | Select SMAJ11A-M3/61 only if circuit polarity is fixed and reverse-only conduction is acceptable. |
| SMBJ11CA-M3/61 | Same electrical specs but in larger SMB (DO-214AA) package; 600 W PPPM rating; higher thermal mass and lower RθJA (90 °C/W vs. 120 °C/W). | Better suited for high-duty-cycle or repeated surge environments; occupies more PCB area and incompatible with SMA footprints. | Choose SMBJ11CA-M3/61 when enhanced power handling or thermal margin is needed and board space allows SMB footprint. |
Compared with SMAJ11A-M3/61, SMAJ11CA-M3/61 provides polarity-agnostic protection essential for differential or AC-coupled signals; compared with SMBJ11CA-M3/61, it trades peak power headroom for compact size and cost efficiency in space-constrained consumer and automotive modules.
Availability
SMAJ11CA-M3/61 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC analog input conditioning, consumer USB interface hardening, and telecom Ethernet PHY port safeguarding requiring stable component supply across production lifecycles.
Supply support for SMAJ11CA-M3/61 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series is engineered for high-reliability transient suppression in harsh environments-targeting automotive, industrial, and communications systems where robustness against ESD, EFT, and surge events is mission-critical.
FAQ
What is the clamping voltage of SMAJ11CA-M3/61 at its rated peak pulse current?
The SMAJ11CA-M3/61 clamps to a maximum of 18.2 V at 22 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees predictable overvoltage limiting for protected circuits, making SMAJ11CA-M3/61 suitable for safeguarding 3.3 V and 5 V logic interfaces without exceeding safe voltage thresholds.
Is SMAJ11CA-M3/61 suitable for automotive applications?
Yes-SMAJ11CA-M3/61 meets commercial-grade specifications and is part of the AEC-Q101-qualified SMAJ family. While the M3/61 suffix denotes halogen-free RoHS compliance (not AEC-Q101), the identical die and construction are used in AEC-Q101 variants (e.g., SMAJ11CAHM3_X). Engineers may use SMAJ11CA-M3/61 in non-safety-critical automotive subsystems such as body control modules or infotainment I/O, with validation per ISO 7637-2.
How does the bidirectional design of SMAJ11CA-M3/61 affect PCB layout?
The bidirectional design of SMAJ11CA-M3/61 eliminates polarity constraints: no cathode band marking exists, and both terminals are functionally identical. This allows placement in either orientation on PCBs-ideal for differential signal lines (e.g., RS-485, CAN) or floating sensors-reducing assembly errors and eliminating orientation verification steps during automated placement of SMAJ11CA-M3/61.
What is the maximum leakage current of SMAJ11CA-M3/61 at its stand-off voltage?
At its 11 V stand-off voltage (VWM) and 25 °C ambient temperature, SMAJ11CA-M3/61 exhibits a maximum reverse leakage current (ID) of 1.0 μA. This ultra-low leakage preserves signal integrity in high-impedance analog paths and avoids loading effects in precision sensor interfaces, confirming SMAJ11CA-M3/61's suitability for battery-powered and low-power IoT endpoints.
Does SMAJ11CA-M3/61 require special handling during reflow soldering?
No-SMAJ11CA-M3/61 is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and withstands standard lead-free reflow profiles with peak temperatures up to 260 °C. No baking or dry-pack handling is required prior to assembly, streamlining manufacturing and ensuring consistent solder joint quality for SMAJ11CA-M3/61 in high-volume SMT lines.
SMAJ11CA-M3/61 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):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 22A
- 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)
SMAJ11CA-M3/61 FAQ
1.How can I place an order for SMAJ11CA-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ11CA-M3/61 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 SMAJ11CA-M3/61 reliable?
The price and inventory of SMAJ11CA-M3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ11CA-M3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ11CA-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ11CA-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ11CA-M3/61?
SMAJ11CA-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ11CA-M3/61 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 SMAJ11CA-M3/61?
For technical support, including SMAJ11CA-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ11CA-M3/61 requirements.
6.How does Aetrix verify that SMAJ11CA-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ11CA-M3/61 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 SMAJ11CA-M3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ11CA-M3/61?
All SMAJ11CA-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ11CA-M3/61, 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 SMAJ11CA-M3/61 part is unused and in its original packaging.
Return procedure for SMAJ11CA-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ11CA-M3/61 Tags
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