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Vishay General Semiconductor - Diodes Division SMAJ9.0AHE3/61
- Part No.:
- SMAJ9.0AHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ9.0AHE3/61.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ9.0AHE3/61 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection of sensitive ICs, MOSFETs, and signal 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 - deployed in consumer, industrial, and automotive electronics.
For engineers reviewing the SMAJ9.0AHE3/61 datasheet, SMAJ9.0AHE3/61 pinout, SMAJ9.0AHE3/61 application, or SMAJ9.0AHE3/61 equivalent, key selection criteria include unidirectional polarity, SMA (DO-214AC) package compatibility, AEC-Q101 qualification status, clamping performance under 26 A surge, and thermal resistance (RθJA = 120 °C/W) for PCB layout validation.
Technical Context
This TVS diode operates as a fast-acting shunt protector that clamps transient overvoltages above its breakdown threshold while maintaining low leakage (<5.0 μA at 9.0 V) in normal operation. Its glass-passivated junction ensures stable VBR tolerance (±5%) and robust surge handling up to 40 A IFSM (8.3 ms half-sine).
The device is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (260 °C reflow peak), and delivers repeatable clamping response with <1 ns typical turn-on time - critical for protecting high-speed interfaces and power rails against ESD, inductive switching spikes, and lightning-induced surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin below breakdown. |
| VBR @ IT = 1 mA | 10.0–11.1 V - Verified breakdown range ensuring reliable triggering during transients without premature conduction. |
| VC @ IPPM = 26.0 A | 15.4 V - Clamped voltage seen by protected circuit during full-rated 10/1000 μs surge; limits stress on downstream components. |
| PPPM | 400 W - Peak pulse power dissipation capability with standard 10/1000 μs waveform; supports repetitive surge events at 0.01% duty cycle. |
| IFSM | 40 A - Non-repetitive forward surge current rating (8.3 ms half-sine); validates robustness against power rail faults. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating requirements above 25 °C ambient. |
| Operating TJ | -55 °C to +150 °C - Full industrial and automotive junction temperature range; enables deployment in under-hood and embedded control units. |
Pinout & Package
Package: SMA (DO-214AC) - surface-mount, low-profile plastic case with matte tin-plated leads; compliant with J-STD-002 and JESD 22-B102 solderability standards. Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return plane; completes clamping loop during reverse-biased surge events. |
| Cathode | Protected line connection / surge input | Connected to signal/power line requiring protection; conducts avalanche current when VLINE exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - suitable for ADAS, body control, and infotainment systems. |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to moisture-induced parameter drift in humid environments. |
| 400 W peak pulse power | Supports high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) without degradation when mounted per recommended pad layout. |
| MSL Level 1 rating | Enables single-reflow assembly without baking; compatible with standard SMT processes using 260 °C peak profile. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns response), improving protection margin for CMOS inputs. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients per ISO 7637-2. IC Role / Device Role / Timing Role: Shunt-clamp TVS placed between power rail and chassis ground to divert >100 V spikes within nanoseconds. Use Value: Limits rail voltage to ≤15.4 V during 26 A surge, preventing latch-up or gate oxide damage in MCU and CAN transceivers. |
Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA loops) and digital I/O (I²C, SPI) in factory automation sensors. IC Role / Device Role / Timing Role: Unidirectional clamp on signal line referenced to local ground, absorbing ESD and inductive kickback. Use Value: Maintains signal integrity with <5.0 μA leakage at 9.0 V and clamps 8 kV contact ESD to <15.4 V, preserving ADC accuracy. |
| Consumer Device USB Port Protection | Telecom Equipment DC Power Input |
Use Scenario: Secondary-level surge suppression on VBUS line of USB 2.0 ports in set-top boxes and smart displays. IC Role / Device Role / Timing Role: Standoff-rated TVS in series with inline fuse, triggered only during overvoltage events exceeding 9.0 V. Use Value: Withstands repeated 10/1000 μs surges up to 400 W without parametric shift, extending field life beyond IEC 61000-4-5 Level 3. |
Use Scenario: Front-end protection of -48 V telecom power supplies against lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-ground on DC input, clamping positive transients on the supply rail. Use Value: Delivers 15.4 V clamping at 26 A with 0.074 %/°C VBR tempco - enabling stable coordination with upstream MOVs and crowbar 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 | Commercial-grade variant; lacks AEC-Q101 qualification and uses RoHS-compliant (non-halogen-free) molding compound. | Approved for non-automotive industrial and consumer use only; not validated for automotive temperature cycling or humidity testing. | Select when cost sensitivity outweighs automotive qualification requirements and full lifecycle traceability is not mandated. |
| SMAJ9.0AHM3/61 | Halogen-free, RoHS-compliant, and AEC-Q101 qualified - identical electrical specs but different material composition and packaging tape. | Meets stricter environmental compliance (e.g., JEDEC J-STD-204) and automotive OEM substance restrictions beyond AEC-Q101. | Choose for Tier 1 automotive programs requiring halogen-free bill-of-materials and extended chemical compliance documentation. |
Compared with SMAJ9.0AHE3/61, the E3/61 variant trades automotive qualification for lower cost in commercial designs, while HM3/61 adds halogen-free compliance for eco-sensitive automotive platforms - all share identical VWM, VC, and PPPM performance in the SMA package.
Availability
SMAJ9.0AHE3/61 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, consumer USB power delivery systems, and telecom DC input protection requiring stable component supply across multi-year production cycles.
Supply support for SMAJ9.0AHE3/61 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, precision, and application-specific optimization.
The SMAJ series was developed to deliver high-power, low-clamping TVS protection in compact surface-mount packages for automotive, industrial, and communications infrastructure - balancing surge robustness, thermal performance, and manufacturability.
FAQ
What is the clamping voltage of SMAJ9.0AHE3/61 at its rated peak pulse current?
The SMAJ9.0AHE3/61 has a maximum clamping voltage (VC) of 15.4 V when subjected to its rated peak pulse current of 26.0 A with a 10/1000 μs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMAJ9.0AHE3/61 maintains this clamping performance across its qualified operating temperature range.
Is SMAJ9.0AHE3/61 suitable for automotive applications?
Yes, SMAJ9.0AHE3/61 is AEC-Q101 qualified and specifically designed for automotive use, including engine control modules, body electronics, and infotainment systems. Its qualification covers temperature cycling, high-temperature reverse bias, and surge endurance testing. The SMAJ9.0AHE3/61 also meets MSL Level 1 for lead-free reflow and operates reliably from -55 °C to +150 °C junction temperature.
What does the "HE3" suffix indicate in SMAJ9.0AHE3/61?
The "HE3" suffix in SMAJ9.0AHE3/61 denotes a RoHS-compliant, AEC-Q101 qualified version with standard (non-halogen-free) molding compound. It distinguishes the part from commercial-grade E3 variants and halogen-free HM3 variants. The "61" indicates packaging in 7-inch diameter tape-and-reel format with 1800 units per reel - a configuration optimized for high-volume SMT placement.
How does SMAJ9.0AHE3/61 compare to bidirectional TVS diodes like SMAJ9.0CA?
SMAJ9.0AHE3/61 is unidirectional and intended for DC line protection where polarity is fixed (e.g., VCC-to-ground), offering lower leakage and sharper knee characteristics. In contrast, SMAJ9.0CA is bidirectional and suited for AC or floating signal lines. The SMAJ9.0AHE3/61 cannot replace SMAJ9.0CA in symmetrical surge environments without circuit redesign due to its inherent polarity dependence and lack of reverse conduction capability.
What is the thermal resistance of SMAJ9.0AHE3/61, and how does it affect PCB layout?
The SMAJ9.0AHE3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. This value assumes minimal copper area; increasing pad size or adding thermal vias reduces RθJA and improves power handling. For sustained surge duty, designers must ensure the SMAJ9.0AHE3/61's junction temperature stays below 150 °C using this thermal model and ambient temperature derating curves from the datasheet.
SMAJ9.0AHE3/61 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMAJ9.0AHE3/61 FAQ
1.How can I place an order for SMAJ9.0AHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ9.0AHE3/61 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 SMAJ9.0AHE3/61 reliable?
The price and inventory of SMAJ9.0AHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ9.0AHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ9.0AHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ9.0AHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ9.0AHE3/61?
SMAJ9.0AHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ9.0AHE3/61 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 SMAJ9.0AHE3/61?
For technical support, including SMAJ9.0AHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ9.0AHE3/61 requirements.
6.How does Aetrix verify that SMAJ9.0AHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ9.0AHE3/61 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 SMAJ9.0AHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ9.0AHE3/61?
All SMAJ9.0AHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ9.0AHE3/61, 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 SMAJ9.0AHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ9.0AHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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