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Vishay General Semiconductor - Diodes Division SMAJ11CA-E3/61
- Part No.:
- SMAJ11CA-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ11CA-E3/61.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,363
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Product details
Overview
SMAJ11CA-E3/61 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, 18.2 V maximum clamping voltage (VC) at 22 A peak pulse current (IPPM), and 400 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial control systems.
For engineers reviewing the SMAJ11CA-E3/61 datasheet, SMAJ11CA-E3/61 pinout, SMAJ11CA-E3/61 application, or SMAJ11CA-E3/61 equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM ≈ 1.65), AEC-Q101 qualification eligibility (via HE3 suffix variants), and compatibility with automated SMT assembly on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR min/max (12.2 V / 13.5 V), ID ≤ 1.0 μA at VWM = 11 V, and clamps to ≤ 18.2 V under 22 A transient surge. Its glass-passivated junction ensures stable leakage and fast response (< 1 ns), while the SMA package supports JEDEC-compliant reflow profiles up to 260 °C peak.
Thermal resistance is RθJA = 120 °C/W (on 0.2" × 0.2" copper pads) and RθJL = 30 °C/W, enabling reliable operation up to TJ = +150 °C. The device meets MSL Level 1 per J-STD-020 and is rated for repetitive surges at 0.01% duty cycle - critical for protecting CAN bus interfaces and motor driver gate drives against inductive switching spikes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal line operating margin. |
| VBR (min/max) | 12.2 V / 13.5 V at IT = 1 mA - guaranteed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 18.2 V at 22 A - clamped voltage under standardized 10/1000 μs surge; determines protected circuit's maximum stress level. |
| PPPM | 400 W - peak pulse power handling with 10/1000 μs waveform; supports high-energy transients common in automotive load-dump scenarios. |
| ID @ VWM | ≤ 1.0 μA - ultra-low reverse leakage at stand-off voltage; preserves signal integrity and minimizes standby power loss. |
| TJ max. | +150 °C - maximum junction temperature; enables use in under-hood automotive and industrial environments. |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 5.28 mm × 4.50 mm footprint and 2.29 mm height; compatible with standard pick-and-place equipment. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated. Bidirectional configuration has no polarity marking; terminals are symmetrical anode/cathode pairs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically in either polarity; conducts surge current bidirectionally when voltage exceeds ±VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN, encoder outputs) without external polarity management. |
| 400 W peak pulse power | Withstands high-energy transients from inductive load switching (e.g., solenoid drivers, relay coils) without degradation under defined test conditions. |
| Low clamping ratio (VC/VWM = 1.65) | Minimizes overvoltage exposure to downstream ICs - critical for 12 V rail protection where logic thresholds are tight. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; simplifies manufacturing logistics for high-volume SMT lines. |
| AEC-Q101 qualification option | HE3/HM3 variants meet automotive reliability standards; supports functional safety requirements in ADAS and body electronics. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus or 12 V supply lines in door modules and seat controllers from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between power rail and ground, responding within < 1 ns to suppress > 100 V spikes. Use Value: Prevents latch-up or permanent damage to microcontrollers and transceivers by limiting rail voltage to ≤ 18.2 V during 400 W surge events. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) of pressure or temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-leakage (≤1 μA) TVS shunting transient energy away from precision amplifier inputs and ADC front-ends. Use Value: Maintains measurement accuracy by avoiding input-stage saturation and preserving signal integrity below 11 V operating range. |
| Consumer Device USB Port Protection | Telecom Signal Line Surge Suppression |
Use Scenario: Safeguarding USB 2.0 D+/D− lines in portable chargers and docking stations against IEC 61000-4-2 ESD (±8 kV contact). IC Role / Device Role / Timing Role: Fast-response bidirectional clamp integrated adjacent to connector, with minimal parasitic capacitance (typ. < 100 pF). Use Value: Prevents data corruption and port controller failure while maintaining signal rise/fall times compliant with USB 2.0 timing budgets. |
Use Scenario: Protecting Ethernet PHY interface pins (e.g., MDI-X) in VoIP phones and DSL modems from lightning-induced surges on twisted-pair cables. IC Role / Device Role / Timing Role: High-power (400 W) transient suppressor placed before magnetics, coordinated with common-mode chokes. Use Value: Absorbs differential-mode surges up to 22 A without thermal runaway, ensuring system-level compliance with IEC 61000-4-5 Level 3 (1 kV/2 Ω). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A-E3/61 | Unidirectional variant; cathode band marked; VF = 3.5 V at 25 A forward current. | Requires correct polarity placement; unsuitable for AC or floating lines without external biasing. | Select only when protecting DC rails with known polarity and need for lower forward voltage drop. |
| SMBJ11CA-E3/52 | Same VWM/VBR/VC specs but in larger SMB (DO-214AA) package; higher RθJA = 90 °C/W; 600 W PPPM rating. | Occupies more PCB area; better thermal performance under sustained surge duty; not drop-in compatible due to footprint mismatch. | Choose when higher surge endurance or improved thermal margin is required and board space allows SMB footprint. |
Compared with SMAJ11A-E3/61, the SMAJ11CA-E3/61 eliminates polarity dependency for simplified layout; versus SMBJ11CA-E3/52, it trades 200 W pulse power headroom for 30% smaller footprint - ideal for space-constrained automotive ECUs and IoT edge nodes.
Availability
SMAJ11CA-E3/61 is available at Aetrix Electronics and suitable for automotive infotainment power conditioning, industrial PLC I/O protection, and telecom base station signal line hardening requiring stable component supply and full traceability.
Supply support for SMAJ11CA-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 automotive-grade qualification.
The SMAJ series delivers robust transient suppression for harsh-environment applications - engineered specifically for AEC-Q101 readiness, high-surge resilience, and seamless integration into automated SMT production lines.
FAQ
What is the clamping voltage of SMAJ11CA-E3/61 at its rated peak pulse current?
The SMAJ11CA-E3/61 clamps to a maximum of 18.2 V at its specified peak pulse current of 22 A, measured using the standardized 10/1000 μs double-exponential waveform. This VC value defines the upper voltage limit imposed on protected circuits during surge events and is confirmed in the Vishay datasheet Document Number 88390, page 2.
Is SMAJ11CA-E3/61 RoHS-compliant and halogen-free?
Yes, SMAJ11CA-E3/61 carries the "E3" suffix, indicating RoHS-compliance per EU Directive 2011/65/EU and adherence to Vishay's material categorization standard (www.vishay.com/doc?99912). It is not halogen-free; for halogen-free compliance, the "M3" suffix variant (e.g., SMAJ11CA-M3/61) must be selected.
Does SMAJ11CA-E3/61 have polarity markings on the package?
No, SMAJ11CA-E3/61 is a bidirectional TVS diode and carries no polarity marking - the SMA package is unmarked, reflecting its symmetrical terminal behavior. This distinguishes it from unidirectional variants like SMAJ11A-E3/61, which feature a visible cathode band.
What is the maximum operating junction temperature for SMAJ11CA-E3/61?
The maximum operating junction temperature (TJ max.) for SMAJ11CA-E3/61 is +150 °C, as specified in the Absolute Maximum Ratings table of the Vishay datasheet. This rating enables deployment in under-hood automotive modules and industrial motor drives where ambient temperatures exceed 105 °C.
Can SMAJ11CA-E3/61 be used in place of SMAJ11A-E3/61 without circuit modification?
No - SMAJ11CA-E3/61 is bidirectional while SMAJ11A-E3/61 is unidirectional; substituting them requires verifying that the protected node is either floating or AC-coupled. In DC-biased applications, SMAJ11A-E3/61's polarity-sensitive clamping may be essential, and direct replacement could compromise protection integrity.
SMAJ11CA-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):
- 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-E3/61 FAQ
1.How can I place an order for SMAJ11CA-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ11CA-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 SMAJ11CA-E3/61 reliable?
The price and inventory of SMAJ11CA-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 SMAJ11CA-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ11CA-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ11CA-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ11CA-E3/61?
SMAJ11CA-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ11CA-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 SMAJ11CA-E3/61?
For technical support, including SMAJ11CA-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ11CA-E3/61 requirements.
6.How does Aetrix verify that SMAJ11CA-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ11CA-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 SMAJ11CA-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ11CA-E3/61?
All SMAJ11CA-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ11CA-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 SMAJ11CA-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ11CA-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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