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Vishay General Semiconductor - Diodes Division SMAJ11CA-M3/5A
- Part No.:
- SMAJ11CA-M3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ11CA-M3/5A.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,055
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Product details
Overview
SMAJ11CA-M3/5A 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 and power lines. It features a 11 V standoff voltage (VWM), 12.2–13.5 V breakdown voltage (VBR) at 1 mA, 18.2 V maximum clamping voltage (VC) at 22 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMAJ11CA-M3/5A datasheet, SMAJ11CA-M3/5A pinout, SMAJ11CA-M3/5A application, or SMAJ11CA-M3/5A equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM = 1.65), AEC-Q101 qualification eligibility (via HM3 suffix), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping performance in forward and reverse directions. Its glass-passivated junction enables fast response time (<1 ps), low incremental surge resistance, and stable breakdown characteristics over temperature (TC of VBR = 0.080 %/°C).
The device is rated for 40 A non-repetitive peak forward surge current (IFSM) and dissipates 3.3 W continuously at TA = 50 °C. Thermal resistance is 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), supporting reliable operation up to TJ = +150 °C in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse stand-off voltage before significant leakage; defines operating margin below clamping threshold. |
| VBR min/max | 12.2 V / 13.5 V at IT = 1 mA - Confirmed breakdown range ensures predictable turn-on during transients. |
| VC @ IPPM | 18.2 V at 22 A - Clamped voltage under 10/1000 μs surge; limits stress on downstream ICs and MOSFETs. |
| PPPM | 400 W - Peak pulse power handling capacity with standard lightning/surge waveform; derates to 300 W above 78 V. |
| IPPM | 22 A - Maximum non-repetitive surge current supported without degradation; validated per Fig. 3 waveform. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive and high-ambient industrial environments. |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.28 mm × 4.50 mm footprint; compatible with J-STD-020 MSL Level 1 reflow. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; polarity-unmarked for bidirectional configuration; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | One terminal of symmetrical junction; conducts during positive overvoltage events relative to cathode reference. |
| Cathode | Transient current entry (negative half-cycle) | Second terminal of symmetrical junction; conducts during negative overvoltage events; no band marking on bidirectional units. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - eliminates need for polarity-aware layout on differential or AC-coupled lines. |
| 400 W peak pulse power | Validated with 10/1000 μs waveform on 5.0 mm × 5.0 mm copper pads - meets IEC 61000-4-5 Level 3 surge immunity requirements. |
| Low clamping ratio | VC/VWM = 1.65 - minimizes voltage overshoot during transient suppression, protecting 12 V rail logic and analog front-ends. |
| AEC-Q101 readiness | HM3 suffix variant qualified per AEC-Q101 - supports automotive subsystems requiring reliability validation (e.g., body control modules). |
| MSL Level 1 | No floor life limitation; withstands peak reflow temperature of 260 °C - simplifies SMT manufacturing without dry-pack or baking. |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input Protection |
|---|---|
|
Use Scenario: Protecting microcontroller GPIOs and CAN transceiver bias lines from load dump and inductive switching spikes in door module ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across 12 V supply rail and signal return path to limit transient excursions to ≤18.2 V. Use Value: Prevents latch-up and gate oxide damage in 3.3 V/5 V logic ICs by clamping surges within 1 ns while maintaining <1 μA leakage at 11 V. |
Use Scenario: Shielding 24 V digital input optocoupler circuits from field-wiring induced transients in factory automation cabinets. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing energy from relay coil flyback and ESD events on DIN-rail mounted I/O cards. Use Value: Enables robust operation under IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) testing without derating or additional RC filtering. |
| Consumer Appliance Motor Drive Interface | Telecom Power Supply Inrush Filtering |
|
Use Scenario: Safeguarding H-bridge gate drivers and current-sense amplifiers in smart washing machine motor controllers. IC Role / Device Role / Timing Role: Low-inductance placement between half-bridge source nodes and ground to suppress shoot-through-induced voltage spikes. Use Value: Limits VDS overshoot on 60 V MOSFETs to safe levels using 18.2 V clamping, reducing need for oversized RDS(on) devices. |
Use Scenario: Suppressing line-side surges entering AC-DC adapter inputs in VoIP phones and DSL modems. IC Role / Device Role / Timing Role: First-stage protection ahead of bridge rectifier and bulk capacitor to absorb 1 kV/0.5 kA common-mode transients. Use Value: Maintains system uptime by preventing fuse blowing and rectifier failure during lightning-induced grid disturbances. |
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-M3/5A | Unidirectional; cathode band marked; same VWM, VBR, VC, PPPM; forward conduction only. | Requires polarity-aware PCB layout; unsuitable for AC or floating signal lines. | Select when protecting DC rails with known polarity and space-constrained unidirectional paths. |
| SMBJ11CA-M3/5A | Same electrical specs but SMB (DO-214AA) package; 30 % larger footprint (4.58 mm × 3.94 mm); 600 W PPPM. | Higher surge margin; better thermal dissipation; requires larger pad area and layout revision. | Choose for enhanced ruggedness in high-reliability industrial power supplies where board space permits. |
Compared with SMAJ11A-M3/5A, SMAJ11CA-M3/5A enables polarity-agnostic protection without layout redesign; versus SMBJ11CA-M3/5A, it trades 200 W pulse headroom for 30 % smaller footprint - ideal for dense automotive sensor modules where space and symmetry are critical.
Availability
SMAJ11CA-M3/5A is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O protection, consumer appliance motor drives, and telecom power input stages requiring stable component supply and halogen-free RoHS compliance.
Supply support for SMAJ11CA-M3/5A 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade qualification.
The SMAJ series is engineered for robust transient suppression in harsh environments, targeting design-in across automotive, industrial, and telecom infrastructure where fast-response, bidirectional clamping is mandatory.
FAQ
What is the clamping voltage of SMAJ11CA-M3/5A at its rated peak pulse current?
The SMAJ11CA-M3/5A exhibits a maximum clamping voltage (VC) of 18.2 V at 22 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured with the device mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per Vishay Document 88390. The clamping performance directly protects downstream 12 V logic and analog circuitry from overvoltage stress during surge events.
Is SMAJ11CA-M3/5A suitable for automotive applications?
Yes - SMAJ11CA-M3/5A is halogen-free and RoHS-compliant (M3 suffix), and its base family is AEC-Q101 qualified when ordered with HM3 suffix (e.g., SMAJ11CA-HM3/5A). While the M3 version itself is commercial-grade, its construction, thermal rating (TJ = 150 °C), and robust surge capability make it widely deployed in non-safety-critical automotive subsystems such as body control modules and infotainment power rails.
How does SMAJ11CA-M3/5A differ from SMAJ11A-M3/5A?
SMAJ11CA-M3/5A is bidirectional with identical electrical behavior in both polarities and no polarity marking, whereas SMAJ11A-M3/5A is unidirectional with a cathode band and conducts only in reverse bias. Both share identical VWM (11 V), VBR (12.2–13.5 V), VC (18.2 V), and PPPM (400 W), but SMAJ11CA-M3/5A eliminates polarity dependency in AC-coupled or floating signal paths.
What is the thermal resistance of SMAJ11CA-M3/5A?
The SMAJ11CA-M3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead resistance (RθJL) of 30 °C/W, measured under standard conditions (TA = 25 °C, minimum recommended pad layout). These values enable continuous power dissipation of 3.3 W at TA = 50 °C and support reliable operation in enclosed industrial enclosures without forced airflow.
Does SMAJ11CA-M3/5A require special handling during reflow soldering?
No - SMAJ11CA-M3/5A meets MSL Level 1 per J-STD-020 and withstands peak reflow temperatures up to 260 °C without floor life restrictions or baking requirements. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102, ensuring consistent wetting and joint integrity in standard lead-free reflow profiles used for commercial and automotive PCB assembly.
SMAJ11CA-M3/5A 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):
- 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-M3/5A FAQ
1.How can I place an order for SMAJ11CA-M3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ11CA-M3/5A 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 SMAJ11CA-M3/5A reliable?
The price and inventory of SMAJ11CA-M3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ11CA-M3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ11CA-M3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ11CA-M3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ11CA-M3/5A?
SMAJ11CA-M3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ11CA-M3/5A 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 SMAJ11CA-M3/5A?
For technical support, including SMAJ11CA-M3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ11CA-M3/5A requirements.
6.How does Aetrix verify that SMAJ11CA-M3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ11CA-M3/5A 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 SMAJ11CA-M3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ11CA-M3/5A?
All SMAJ11CA-M3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ11CA-M3/5A, 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 SMAJ11CA-M3/5A part is unused and in its original packaging.
Return procedure for SMAJ11CA-M3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ11CA-M3/5A Tags
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