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Vishay General Semiconductor - Diodes Division SMAJ9.0CA-E3/61
- Part No.:
- SMAJ9.0CA-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ9.0CA-E3/61.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,370
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Product details
Overview
SMAJ9.0CA-E3/61 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features a 9.0 V stand-off voltage (VWM), 10.0–11.1 V breakdown voltage (VBR) at 1 mA, 15.4 V maximum clamping voltage (VC) at 26.0 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform.
For engineers reviewing the SMAJ9.0CA-E3/61 datasheet, SMAJ9.0CA-E3/61 pinout, SMAJ9.0CA-E3/61 application, or SMAJ9.0CA-E3/61 equivalent, this device is selected for robust ESD and surge protection in automotive sensor interfaces, industrial I/O ports, and telecom line receivers where bidirectional clamping, low leakage (<5.0 μA at VWM), and AEC-Q101 qualification are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its glass-passivated junction ensures stable VBR tolerance (±5% typical), low incremental surge resistance, and fast response time (<1.0 ns), critical for suppressing EFT bursts and lightning-induced surges per IEC 61000-4-2/4-4/4-5.
The device is rated for 400 W peak pulse power up to 78 V and derates to 300 W above that threshold, with thermal resistance RθJA = 120 °C/W on standard 0.2" × 0.2" copper pads. Junction temperature range is –55 °C to +150 °C, supporting under-hood automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - Maximum continuous reverse operating voltage before significant leakage begins; sets upper limit for normal signal swing. |
| VBR (min/max) | 10.0 V / 11.1 V at 1 mA - Confirmed breakdown threshold range; defines reliable turn-on margin for transient suppression. |
| VC @ IPPM | 15.4 V at 26.0 A - Clamped voltage during 10/1000 μs surge; determines maximum stress imposed on downstream ICs. |
| IPPM | 26.0 A - Peak surge current capability under standardized waveform; validates protection level against IEC 61000-4-5 Level 3 (1 kV/2 Ω). |
| PPPM | 400 W - Peak pulse power handling; enables robust protection against repetitive transients in industrial control systems. |
| ID @ VWM | <5.0 μA - Reverse leakage current at stand-off voltage; ensures minimal signal loading on high-impedance sensor lines. |
| TJ Range | –55 °C to +150 °C - Full operational junction temperature range; supports AEC-Q101-compliant automotive deployment. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Case meets UL 94 V-0; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Accepts negative-going surges; forms symmetrical clamping path with cathode terminal. |
| Cathode | Transient current entry (positive polarity) | Accepts positive-going surges; completes bidirectional conduction path with anode terminal. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC-coupled or floating differential lines (e.g., RS-485, CAN, sensor bridges) without external polarity management. |
| 400 W peak pulse power | Withstands repeated 10/1000 μs surges up to 26 A, meeting IEC 61000-4-5 requirements for industrial and automotive port protection. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage stress on protected ICs-critical for 3.3 V and 5 V logic interfacing with microcontrollers and transceivers. |
| AEC-Q101 qualified option | E3 suffix denotes RoHS-compliant commercial grade; HE3 variant available for automotive-grade reliability with full qualification testing. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow compatibility at 260 °C peak, simplifying SMT assembly without baking requirements. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector entry point to shunt transients before reaching signal conditioning circuitry. Use Value: Limits induced voltage to ≤15.4 V during 26 A surges, preserving integrity of 5 V ADC inputs and preventing latch-up in downstream op-amps. | Use Scenario: Shielding PLC digital input channels from inductive kickback when switching solenoids or relays in factory automation. IC Role / Device Role / Timing Role: Standoff-clamp protector on 24 V DC input lines, operating in parallel with optocoupler input stage. Use Value: Suppresses >1 kV transients per IEC 61000-4-4 while maintaining <5 μA leakage at 24 V nominal, ensuring stable logic state recognition. |
| Telecom Line Receiver | Consumer USB Port ESD Protection |
Use Scenario: Safeguarding RS-232/RS-485 receiver pins in base station equipment subjected to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on differential bus lines, paired with common-mode chokes. Use Value: Clamps common-mode surges to ≤15.4 V within <1 ns, preventing damage to ±12 V tolerant transceivers and maintaining data integrity. | Use Scenario: Adding secondary-level ESD immunity to USB 2.0 D+/D– lines in smart home hubs, supplementing internal SoC protection. IC Role / Device Role / Timing Role: External bidirectional TVS placed adjacent to USB connector to absorb ±15 kV contact discharge per IEC 61000-4-2. Use Value: Achieves sub-15.4 V clamping at 26 A, reducing ESD-induced reset events and extending field lifetime of USB PHY circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0A-E3/61 | Unidirectional version; cathode band marked; VF = 3.5 V at 25 A forward conduction. | Requires polarity-aware layout; unsuitable for AC or floating signals. | Select only when protecting DC-biased unidirectional lines (e.g., 5 V supply rails) and polarity alignment is guaranteed. |
| SMBJ9.0CA-E3/52 | Larger SMB (DO-214AA) package; 600 W PPPM; same VWM/VBR/VC specs; RθJA = 85 °C/W. | Higher power handling but occupies ~30% more PCB area; better thermal performance on minimal copper. | Choose when surge energy exceeds 400 W limits or board layout allows larger footprint for enhanced reliability margin. |
Compared with SMAJ9.0A-E3/61, the bidirectional SMAJ9.0CA-E3/61 eliminates polarity dependency for floating interfaces, while SMBJ9.0CA-E3/52 offers higher surge capacity at the cost of board space-making SMAJ9.0CA-E3/61 optimal for compact, polarity-agnostic protection in automotive and industrial edge nodes.
Availability
SMAJ9.0CA-E3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial digital I/O protection, and telecom line receiver circuits requiring stable component supply, RoHS compliance, and traceable sourcing.
Supply support for SMAJ9.0CA-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, precision, and application-specific optimization.
The SMAJ series is engineered for high-reliability transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where consistent clamping, low leakage, and AEC-Q101 qualification are mandatory.
FAQ
What is the clamping voltage of SMAJ9.0CA-E3/61 under a 10/1000 μs surge?
The SMAJ9.0CA-E3/61 has a maximum clamping voltage (VC) of 15.4 V at 26.0 A peak pulse current with a 10/1000 μs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document Number: 88390, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuitry during surge events. The SMAJ9.0CA-E3/61 maintains this clamping performance across its full operating temperature range.
Is SMAJ9.0CA-E3/61 suitable for automotive applications?
Yes, SMAJ9.0CA-E3/61 is RoHS-compliant and compatible with AEC-Q101-qualified variants (e.g., SMAJ9.0CAHE3). While the E3 suffix denotes commercial-grade qualification, its –55 °C to +150 °C junction temperature range, low leakage (<5.0 μA), and robust 400 W surge rating align with automotive sensor and body-control module requirements. For certified automotive use, specify the HE3 suffix variant of SMAJ9.0CA-E3/61.
How does SMAJ9.0CA-E3/61 differ from unidirectional SMAJ9.0A-E3/61?
SMAJ9.0CA-E3/61 is bidirectional with symmetrical clamping in both polarities and no polarity marking, whereas SMAJ9.0A-E3/61 is unidirectional with a cathode band and forward voltage drop (VF = 3.5 V at 25 A). The SMAJ9.0CA-E3/61 supports AC-coupled or floating signal lines like RS-485 or bridge sensors, while SMAJ9.0A-E3/61 suits DC-biased rails such as 5 V supply lines. Both share identical VWM, VBR, and VC ratings.
What is the thermal resistance of SMAJ9.0CA-E3/61?
The SMAJ9.0CA-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet. Its junction-to-lead resistance (RθJL) is 30 °C/W. These values inform thermal design for sustained power dissipation and ensure safe operation within the –55 °C to +150 °C junction temperature range of SMAJ9.0CA-E3/61.
Does SMAJ9.0CA-E3/61 meet industry surge immunity standards?
Yes, SMAJ9.0CA-E3/61 supports compliance with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (surge) when applied per recommended layout guidelines. Its 400 W peak pulse power rating with 10/1000 μs waveform, 15.4 V clamping voltage, and <1 ns response time enable protection against Level 3 (1 kV/2 Ω) surge events. System-level validation is required, but SMAJ9.0CA-E3/61 provides the foundational clamping performance needed for these standards.
SMAJ9.0CA-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):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 26A
- 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)
SMAJ9.0CA-E3/61 FAQ
1.How can I place an order for SMAJ9.0CA-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ9.0CA-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 SMAJ9.0CA-E3/61 reliable?
The price and inventory of SMAJ9.0CA-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 SMAJ9.0CA-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ9.0CA-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ9.0CA-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ9.0CA-E3/61?
SMAJ9.0CA-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ9.0CA-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 SMAJ9.0CA-E3/61?
For technical support, including SMAJ9.0CA-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ9.0CA-E3/61 requirements.
6.How does Aetrix verify that SMAJ9.0CA-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ9.0CA-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 SMAJ9.0CA-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ9.0CA-E3/61?
All SMAJ9.0CA-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ9.0CA-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 SMAJ9.0CA-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ9.0CA-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ9.0CA-E3/61 Tags
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