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Vishay General Semiconductor - Diodes Division SMAJ9.0CAHE3/61
- Part No.:
- SMAJ9.0CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ9.0CAHE3/61.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,118
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Product details
Overview
SMAJ9.0CAHE3/61 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 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 - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMAJ9.0CAHE3/61 datasheet, SMAJ9.0CAHE3/61 pinout, SMAJ9.0CAHE3/61 application, or SMAJ9.0CAHE3/61 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VWM ≈ 1.71), MSL Level 1 moisture sensitivity, and compatibility with automated SMT assembly on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamping protector with symmetrical avalanche behavior in both directions, enabling suppression of positive and negative transients without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the low incremental surge resistance supports effective energy diversion during ESD or load-switching events.
The SMAJ9.0CAHE3/61 is rated for repetitive 10/1000 μs surges at 0.01% duty cycle (400 W up to 78 V; derated to 300 W above), with thermal resistance RθJA = 120 °C/W and RθJL = 30 °C/W - confirming suitability for board-level thermal management without heatsinking under typical PCB pad layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal line operating margin. |
| VBR (min/max) | 10.0 V / 11.1 V at IT = 1 mA - Ensures predictable avalanche initiation across manufacturing lot and temperature range. |
| VC @ IPPM | 15.4 V at 26.0 A - Clamped voltage seen by protected circuit during worst-case 10/1000 μs surge; determines downstream component stress. |
| PPPM | 400 W (10/1000 μs) - Peak transient energy handling capacity; validates compliance with IEC 61000-4-5 Level 3/4 surge immunity. |
| ID @ VWM | 5.0 μA - Low leakage preserves signal integrity and battery life in always-on sensor or communication lines. |
| TJ max. | +150 °C - Enables operation in under-hood automotive or high-temperature industrial environments. |
| Package | SMA (DO-214AC) - Standardized SMT footprint compatible with JEDEC MS-013; supports automated placement and reflow. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, meeting JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Conducts during negative voltage excursions; forms symmetrical clamping path with cathode. |
| Cathode | Transient current entry (positive half-cycle) | Conducts during positive voltage excursions; enables bidirectional protection without external polarity routing. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control, ADAS, and body electronics. |
| 400 W peak pulse power | Meets IEC 61000-4-5 surge immunity requirements for industrial and telecom equipment with minimal PCB area. |
| Low clamping ratio (VC/VWM = 1.71) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio TVS devices, improving system robustness. |
| MSL Level 1 (260 °C peak) | Enables standard lead-free reflow without baking or special handling - reduces manufacturing cost and risk of moisture-induced popcorning. |
| Glass passivated junction | Provides stable VBR tolerance and long-term parameter stability under thermal and electrical stress in harsh environments. |
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 inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector or IC input pins to limit transient amplitude before it reaches sensitive analog front-ends or communication PHYs. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V microcontrollers and precision ADCs during ISO 7637-2 Pulse 1/2a/5a events. |
Use Scenario: Safeguarding digital input/output channels on programmable logic controllers against field-wiring induced surges and ground bounce in factory automation systems. IC Role / Device Role / Timing Role: Fast-acting shunt protector on 24 V DC I/O lines, absorbing energy from relay coil flyback or electrostatic discharge before reaching FPGA or isolation barrier. Use Value: Eliminates need for external series impedance or RC filtering, preserving signal edge integrity and reducing BOM count. |
| Consumer Device USB Port Protection | Telecom Power Supply Rail Clamping |
Use Scenario: Shielding USB 2.0 data lines and VBUS from ESD (IEC 61000-4-2 ±15 kV contact) and hot-plug voltage overshoot in smart home hubs and portable accessories. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed between D+/D− and GND, leveraging symmetrical clamping to avoid signal distortion during differential signaling. Use Value: Maintains USB signal integrity (≤0.5 pF typical junction capacitance at VWM) while passing full-speed data without jitter or packet loss. |
Use Scenario: Clamping secondary-side 12 V or 48 V DC power rails in telecom base station power modules exposed to lightning-induced surges on AC mains or PoE lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on regulated output rail, working in coordination with upstream MOVs and fuses to provide staged surge protection. Use Value: Limits rail excursion to ≤15.4 V during 400 W transients, preventing brownout or reset of DSPs, FPGAs, and RF amplifiers downstream. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0CA-M3/61 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification; same SMA package and pinout. | No functional difference; selected when halogen-free material compliance is mandated by OEM environmental policy. | Choose SMAJ9.0CA-M3/61 if halogen-free bill-of-materials is required; otherwise SMAJ9.0CAHE3/61 satisfies automotive AEC-Q101 and RoHS. |
| SMBJ9.0CAHE3/61 | Higher 600 W peak pulse power rating; larger SMB (DO-214AA) package; same VWM, VBR, and VC values; RθJA = 90 °C/W. | Better thermal performance and surge margin; requires larger PCB footprint and may not fit space-constrained automotive modules. | Select SMBJ9.0CAHE3/61 only when 400 W is insufficient and layout allows SMB footprint; SMAJ9.0CAHE3/61 remains optimal for size-constrained designs. |
Compared with SMAJ9.0CA-M3/61, the SMAJ9.0CAHE3/61 offers identical protection performance with standard RoHS compliance, while SMBJ9.0CAHE3/61 trades compactness for higher surge capacity - making SMAJ9.0CAHE3/61 the balanced choice for AEC-Q101-compliant, space-sensitive automotive and industrial applications.
Availability
SMAJ9.0CAHE3/61 is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O protection, and consumer USB interface hardening requiring stable component supply, AEC-Q101 traceability, and consistent TVS clamping performance across production lots.
Supply support for SMAJ9.0CAHE3/61 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series was developed specifically for robust, surface-mount transient suppression in automotive, industrial, and communications systems where AEC-Q101 qualification, low clamping voltage, and automated assembly compatibility are mandatory.
FAQ
What does the "HE3" suffix indicate in SMAJ9.0CAHE3/61?
The "HE3" suffix denotes that the SMAJ9.0CAHE3/61 is RoHS-compliant and AEC-Q101 qualified for automotive applications. It uses matte tin-plated leads, meets JESD 201 Class 2 whisker resistance, and is rated for operation from –55 °C to +150 °C - distinguishing it from commercial-grade E3 or M3 variants.
Is SMAJ9.0CAHE3/61 unidirectional or bidirectional?
SMAJ9.0CAHE3/61 is a bidirectional transient voltage suppressor, as confirmed by the "CA" designation in its part number. It provides symmetrical clamping for both positive and negative transients without polarity marking on the SMA package - ideal for AC-coupled or differential signal lines.
What is the maximum clamping voltage of SMAJ9.0CAHE3/61 under surge conditions?
The SMAJ9.0CAHE3/61 has a maximum clamping voltage (VC) of 15.4 V at 26.0 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per IEC 61000-4-5 and defines the upper voltage limit imposed on protected circuits during standardized surge events.
Does SMAJ9.0CAHE3/61 require a heatsink for standard operation?
No, SMAJ9.0CAHE3/61 does not require an external heatsink under typical conditions. Its thermal resistance RθJA is 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - sufficient for intermittent 400 W surges at 0.01% duty cycle without exceeding TJ max. of +150 °C.
How does SMAJ9.0CAHE3/61 compare to SMAJ9.0AHE3/61 in terms of functionality?
SMAJ9.0CAHE3/61 is bidirectional with symmetrical clamping, while SMAJ9.0AHE3/61 is unidirectional and features a cathode band marking. The "CA" version protects both polarities - essential for AC signals or floating references - whereas the "A" version only clamps positive transients relative to cathode, requiring correct orientation during placement.
SMAJ9.0CAHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ9.0CAHE3/61 FAQ
1.How can I place an order for SMAJ9.0CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ9.0CAHE3/61 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 SMAJ9.0CAHE3/61 reliable?
The price and inventory of SMAJ9.0CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ9.0CAHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ9.0CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ9.0CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ9.0CAHE3/61?
SMAJ9.0CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ9.0CAHE3/61 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 SMAJ9.0CAHE3/61?
For technical support, including SMAJ9.0CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ9.0CAHE3/61 requirements.
6.How does Aetrix verify that SMAJ9.0CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ9.0CAHE3/61 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 SMAJ9.0CAHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ9.0CAHE3/61?
All SMAJ9.0CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ9.0CAHE3/61, 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 SMAJ9.0CAHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ9.0CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ9.0CAHE3/61 Tags
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