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Vishay General Semiconductor - Diodes Division SMAJ9.0CA-E3/5A
- Part No.:
- SMAJ9.0CA-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ9.0CA-E3/5A.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,715
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Product details
Overview
SMAJ9.0CA-E3/5A from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection 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 (IPPM), and 400 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMAJ9.0CA-E3/5A datasheet, SMAJ9.0CA-E3/5A pinout, SMAJ9.0CA-E3/5A application, or SMAJ9.0CA-E3/5A equivalent, key selection criteria include bidirectional clamping symmetry, low 15.4 V VC under 26 A surge, RoHS-compliant SMA (DO-214AC) packaging, and AEC-Q101 qualification eligibility via HE3/HM3 variants.
Technical Context
This TVS operates as a voltage-clamped shunt protector: during transients exceeding VWM (9.0 V), it avalanches symmetrically in both directions to clamp line voltage at ≤15.4 V. Its glass-passivated junction ensures stable VBR tolerance (±5% typical) and fast response (<1 ns), while the low incremental surge resistance minimizes voltage overshoot under high di/dt events.
The device is rated for repetitive 0.01% duty cycle surges up to 400 W below 78 V (300 W above), with thermal resistance RθJA = 120 °C/W and operating junction temperature range of –55 °C to +150 °C - enabling reliable deployment in thermally constrained PCB layouts without heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - Maximum continuous reverse working voltage before clamping initiates |
| VBR min/max | 10.0 V / 11.1 V at 1 mA - Confirmed avalanche onset range ensuring predictable turn-on margin |
| VC @ IPPM | 15.4 V at 26.0 A - Clamped voltage under standardized 10/1000 μs surge, defining worst-case rail excursion |
| PPPM | 400 W - Peak pulse power handling capability with 10/1000 μs waveform, critical for IEC 61000-4-5 compliance |
| ID @ VWM | 5.0 μA - Reverse leakage at 9.0 V, low enough to avoid signal integrity degradation in high-impedance circuits |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.28 mm × 4.50 mm footprint, compatible with automated placement |
| TJ max | +150 °C - Enables operation in under-hood automotive and industrial environments without derating |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C reflow peak). Bidirectional construction has no polarity marking; terminals are symmetrical anode/cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Provides low-impedance shunt to ground or rail during positive or negative transients |
| Cathode | Transient return path (bidirectional) | Electrically identical to Anode in CA devices; forms symmetrical clamping pair across protected line |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating differential lines without polarity concerns |
| 400 W peak pulse power | Meets IEC 61000-4-5 Level 4 (4 kV surge) requirements when mounted per recommended 5.0 mm × 5.0 mm copper pads |
| 15.4 V clamping voltage @ 26 A | Limits downstream IC stress to safe levels for 3.3 V and 5 V logic interfaces during ESD/EFT events |
| AEC-Q101 qualification option | HE3/HM3 suffix variants support automotive-grade reliability validation for engine control and ADAS sensor modules |
| Low 120 °C/W RθJA | Permits sustained operation at full power in compact layouts without forced airflow or heatsinks |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt TVS placed directly at connector entry point to divert surge energy before reaching interface IC. Use Value: Clamps induced transients to ≤15.4 V, preserving integrity of 5 V tolerant transceivers and preventing latch-up in microcontroller ADC inputs. | Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring surge and inductive kickback. IC Role / Device Role / Timing Role: Parallel-connected TVS on each channel input to absorb 1 kV/40 Ω IEC 61000-4-4 bursts. Use Value: Limits voltage seen by optocoupler input stage to safe levels, eliminating false triggering and extending isolation barrier lifetime. |
| Consumer USB Port Protection | Telecom Line Interface Protection |
Use Scenario: Guarding USB 2.0 D+/D– lines in set-top boxes and routers against ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed adjacent to USB connector to minimize signal distortion. Use Value: Delivers <1 ns response and 15.4 V clamping without degrading 480 Mbps data eye, meeting IEC 61000-4-2 ±15 kV contact discharge. | Use Scenario: Protecting Ethernet PHY front-end and telephone line interface ICs from lightning-induced surges on RJ-11/RJ-45 ports. IC Role / Device Role / Timing Role: Primary shunt protector on tip/ring lines upstream of transformer and PHY. Use Value: Handles 400 W surges per line while maintaining <5 μA leakage at 9 V, avoiding DC bias shift in analog line drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0A-E3/5A | Unidirectional; 9.0 V VWM, 10.0–11.1 V VBR, same package and PPPM | Requires explicit polarity alignment; unsuitable for AC or floating lines | Select only when protecting DC rails with known polarity and no reverse-voltage risk |
| SMCJ9.0CA | Same VWM/VBR/VC specs but in larger SMC (DO-214AB) package; 1500 W PPPM rating | Higher surge capacity suits higher-energy threats (e.g., 10/1000 μs 6 kV), but requires 2.5× PCB area | Choose when system-level surge testing exceeds 400 W or layout allows larger footprint |
Compared with SMAJ9.0A-E3/5A, the unidirectional variant demands strict polarity awareness and cannot protect bidirectional signals; versus SMCJ9.0CA, the SMAJ9.0CA-E3/5A trades surge headroom for space-constrained designs where 400 W suffices and board real estate is premium.
Availability
SMAJ9.0CA-E3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, consumer USB port protection, and telecom line interface circuits requiring stable component supply and consistent surge performance.
Supply support for SMAJ9.0CA-E3/5A 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series targets cost-sensitive, space-constrained transient protection across automotive, industrial, and consumer systems - engineered for rapid response, repeatable clamping, and compatibility with high-volume SMT assembly.
FAQ
What does the "CA" suffix indicate in SMAJ9.0CA-E3/5A?
The "CA" suffix denotes a bidirectional configuration: SMAJ9.0CA-E3/5A provides symmetrical clamping for both positive and negative transients, making it suitable for AC-coupled lines, differential buses, or any application where voltage polarity reversal may occur. Unlike unidirectional "A" variants, it has no cathode marking and identical electrical behavior in either direction - confirmed by VBR min/max values applying equally to both polarities in the Vishay datasheet.
Is SMAJ9.0CA-E3/5A qualified for automotive use?
SMAJ9.0CA-E3/5A itself is commercial-grade (E3 suffix), but Vishay offers AEC-Q101-qualified versions under HE3 (RoHS-compliant) or HM3 (halogen-free) suffixes - e.g., SMAJ9.0CAHE3_A/I. These variants undergo stress testing per AEC-Q101 including HTGB, TCT, and ESD, and are designated for automotive applications such as body control modules and sensor nodes. The base SMAJ9.0CA-E3/5A is not AEC-Q101 certified.
What is the maximum clamping voltage of SMAJ9.0CA-E3/5A under surge conditions?
The maximum clamping voltage (VC) of SMAJ9.0CA-E3/5A is 15.4 V, measured at its rated peak pulse current (IPPM) of 26.0 A using the standard 10/1000 μs waveform. This value represents the worst-case voltage imposed on the protected circuit during a full-rated surge event and is guaranteed across the operating temperature range per Vishay's datasheet Figure 1 and Table on page 2.
How does the SMAJ9.0CA-E3/5A compare to SMAJ9.0A-E3/5A in circuit design?
SMAJ9.0CA-E3/5A and SMAJ9.0A-E3/5A share identical VWM (9.0 V), VBR (10.0–11.1 V), VC (15.4 V), and PPPM (400 W), but differ fundamentally in polarity: SMAJ9.0CA-E3/5A is bidirectional with no polarity marking, while SMAJ9.0A-E3/5A is unidirectional with a cathode band. Using SMAJ9.0A-E3/5A on a bidirectional line risks failure during negative transients - SMAJ9.0CA-E3/5A eliminates this risk through symmetrical conduction.
What PCB layout guidance applies to SMAJ9.0CA-E3/5A for optimal surge performance?
For optimal surge performance, Vishay specifies mounting SMAJ9.0CA-E3/5A on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - this pad area is required to achieve the rated 400 W peak pulse power. Traces to the device must be short and wide to minimize inductance; ground paths should connect directly to solid ground planes. Thermal relief is discouraged, as it increases RθJA and reduces surge endurance. The device's MSL Level 1 rating permits standard reflow profiles up to 260 °C peak.
SMAJ9.0CA-E3/5A 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):
- 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-E3/5A FAQ
1.How can I place an order for SMAJ9.0CA-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ9.0CA-E3/5A 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 SMAJ9.0CA-E3/5A reliable?
The price and inventory of SMAJ9.0CA-E3/5A 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-E3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ9.0CA-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ9.0CA-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ9.0CA-E3/5A?
SMAJ9.0CA-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ9.0CA-E3/5A 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 SMAJ9.0CA-E3/5A?
For technical support, including SMAJ9.0CA-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ9.0CA-E3/5A requirements.
6.How does Aetrix verify that SMAJ9.0CA-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ9.0CA-E3/5A 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 SMAJ9.0CA-E3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ9.0CA-E3/5A?
All SMAJ9.0CA-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ9.0CA-E3/5A, 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 SMAJ9.0CA-E3/5A part is unused and in its original packaging.
Return procedure for SMAJ9.0CA-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ9.0CA-E3/5A Tags
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