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Vishay General Semiconductor - Diodes Division SMAJ10AHM3/I
- Part No.:
- SMAJ10AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ10AHM3/I.pdf
- Description:
- TVS DIODE 10VWM 17VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,093
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Product details
Overview
SMAJ10AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 10 V stand-off voltage (VWM), 11.1–12.3 V breakdown voltage (VBR) at 1 mA, 17.0 V maximum clamping voltage (VC) at 23.5 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 μs waveform), used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMAJ10AHM3/I datasheet, SMAJ10AHM3/I pinout, SMAJ10AHM3/I application, or SMAJ10AHM3/I equivalent, key selection criteria include its unidirectional polarity, AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, 150 °C max junction temperature, and compatibility with automated SMT placement on PCBs requiring transient immunity per IEC 61000-4-2/4-4/4-5.
Technical Context
This TVS diode operates as a fast-acting shunt clamp during overvoltage events, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its unidirectional configuration enables integration into DC power rails and single-polarity signal paths where reverse conduction must be blocked.
The device is rated for 400 W peak pulse power (derated to 300 W above 78 V), supports 40 A non-repetitive forward surge current (8.3 ms half-sine), and maintains stable clamping performance across -55 °C to +150 °C operating junction temperature range - validated under J-STD-020 MSL Level 1 reflow conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for protected line. |
| VBR (min/max) | 11.1 V / 12.3 V at 1 mA - Confirmed breakdown threshold ensures predictable turn-on during transients without premature conduction. |
| VC @ IPPM | 17.0 V at 23.5 A - Clamped voltage level limits stress on downstream components during 10/1000 μs surge events. |
| PPPM | 400 W (10/1000 μs) - Peak energy-handling capability for lightning-induced or inductive-switching surges in automotive and industrial environments. |
| ID @ VWM | 1.0 μA - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| TJ max. | +150 °C - Enables reliable operation in under-hood automotive modules and enclosed industrial enclosures without derating. |
| Package | SMA (DO-214AC) - Standardized 2-pin surface-mount outline compatible with JEDEC MS-013AC footprint and automated pick-and-place. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; cathode indicated by band marking on unidirectional devices; terminals solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side of protected circuit (e.g., ground or return path); enables unidirectional clamping only when cathode is at higher potential. |
| Cathode | Current exit terminal during forward conduction; marked with band | Connected to higher-potential side (e.g., supply rail or signal line); conducts surge current to ground when transient exceeds VWM. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock - suitable for engine control units and ADAS sensors. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for global electronics manufacturing without compromising thermal or electrical performance. |
| 400 W peak pulse power (10/1000 μs) | Provides robust protection against IEC 61000-4-5 Level 4 (4 kV) surges on 12 V/24 V vehicle power buses and industrial PLC inputs. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during clamping, reducing risk of latch-up or gate oxide damage in protected MOSFETs and microcontrollers. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile usage (peak 260 °C) without baking - simplifies SMT production planning. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-supplied ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Shunt-clamp TVS placed between VBAT and GND to limit voltage excursions below 17 V during ISO 7637-2 Pulse 5a events. Use Value: Prevents permanent damage to MCU power supplies and CAN transceivers while maintaining system uptime in harsh vehicle environments. |
Use Scenario: Safeguarding analog output lines of pressure/temperature sensors in factory automation equipment. IC Role / Device Role / Timing Role: Unidirectional TVS connected across sensor output and ground to suppress ESD and switching noise from nearby solenoids or relays. Use Value: Ensures signal fidelity and measurement accuracy by limiting transient-induced offset errors and preventing ADC saturation. |
| Consumer USB Power Input Protection | Telecom Line Card Surge Suppression |
Use Scenario: Securing 5 V USB-C power input stages in portable medical monitors and smart home hubs. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to clamp contact discharge ESD (IEC 61000-4-2 ±15 kV air/±8 kV contact). Use Value: Eliminates need for secondary filtering components while meeting Class B EMC requirements and preserving USB 2.0 signal integrity. |
Use Scenario: Front-end protection of Ethernet PHY power pins in telecom base station line cards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS integrated into 3.3 V/5 V bias networks to absorb common-mode transients coupled onto PoE or auxiliary rails. Use Value: Extends mean time between failures (MTBF) by absorbing >95 % of 10/1000 μs surge energy before reaching sensitive PHY ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ10AHE3/I | Same electrical specs but RoHS-compliant (non-halogen-free) and commercial-grade (not AEC-Q101 qualified). | Lacks automotive qualification; suitable for consumer or industrial applications where AEC-Q101 is not mandated. | Select SMAJ10AHE3/I for cost-sensitive designs outside automotive OEM supply chains. |
| SMAJ10A-M3/5A | Identical electrical and thermal specs; differs only in packaging format (13" reel, 7500 pcs) and base P/N suffix. | No functional difference; same halogen-free, RoHS-compliant, commercial-grade specification as SMAJ10AHM3/I. | Choose SMAJ10A-M3/5A when procurement volume aligns with 13" reel logistics and no AEC-Q101 requirement exists. |
Compared with SMAJ10AHM3/I, SMAJ10AHE3/I offers identical clamping performance but lacks AEC-Q101 validation for automotive use, while SMAJ10A-M3/5A provides identical halogen-free compliance in a different tape-and-reel configuration - making SMAJ10AHM3/I the optimal choice when both automotive qualification and halogen-free compliance are mandatory.
Availability
SMAJ10AHM3/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, and telecom line cards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMAJ10AHM3/I 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 is engineered for high-energy transient suppression in demanding environments, targeting automotive, industrial, and communications systems where robustness against ESD, EFT, and surge events is critical.
FAQ
What is the maximum clamping voltage of the SMAJ10AHM3/I under a 10/1000 μs surge?
The SMAJ10AHM3/I has a maximum clamping voltage (VC) of 17.0 V at 23.5 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured per IEC 61000-4-5 test conditions and ensures downstream components remain within safe operating voltage limits during surge events. The SMAJ10AHM3/I achieves this clamping performance while maintaining low incremental surge resistance and fast response time.
Is the SMAJ10AHM3/I suitable for automotive applications?
Yes, the SMAJ10AHM3/I is AEC-Q101 qualified, as confirmed by the HM3 suffix in its part number and Vishay's official documentation. It meets automotive-grade reliability requirements including temperature cycling, mechanical shock, and humidity testing. The SMAJ10AHM3/I is explicitly recommended for engine control units, body electronics, and ADAS sensor modules where transient immunity and long-term stability are essential.
What does the "HM3" suffix indicate in SMAJ10AHM3/I?
The "HM3" suffix in SMAJ10AHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Per Vishay's ordering nomenclature, "H" indicates AEC-Q101 qualification, "M3" specifies halogen-free and RoHS-compliant materials, and "I" designates 13-inch tape-and-reel packaging (7500 pieces). This makes the SMAJ10AHM3/I distinct from commercial-grade variants like SMAJ10A-E3/I or non-halogen-free automotive versions like SMAJ10AHE3/I.
How does the SMAJ10AHM3/I compare to bidirectional TVS diodes like SMAJ10CA?
The SMAJ10AHM3/I is unidirectional and intended for DC-biased lines where reverse conduction must be blocked, whereas SMAJ10CA is bidirectional and suited for AC or symmetrical signal lines. The SMAJ10AHM3/I exhibits forward voltage drop (~3.5 V at 25 A) and cathode marking, while SMAJ10CA has no polarity marking and symmetric clamping in both directions. Their VWM, VBR, and VC values differ accordingly - SMAJ10AHM3/I is not interchangeable with SMAJ10CA without circuit redesign.
What is the thermal resistance of the SMAJ10AHM3/I, and how does it affect layout design?
The SMAJ10AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead resistance (RθJL) of 30 °C/W, measured on 0.2" × 0.2" copper pads. To maintain safe operation at full 400 W pulse rating, PCB layout must provide adequate copper area and thermal vias - especially critical in automotive applications where ambient temperatures exceed 85 °C. Derating curves in the Vishay datasheet (Fig. 2) guide thermal design for sustained surge duty cycles.
SMAJ10AHM3/I 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):
- 10V
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- Current - Peak Pulse (10/1000µs):
- 23.5A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ10AHM3/I FAQ
1.How can I place an order for SMAJ10AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ10AHM3/I 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 SMAJ10AHM3/I reliable?
The price and inventory of SMAJ10AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ10AHM3/I is usually 5 days.
3.What payment methods are accepted for SMAJ10AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ10AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ10AHM3/I?
SMAJ10AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ10AHM3/I 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 SMAJ10AHM3/I?
For technical support, including SMAJ10AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ10AHM3/I requirements.
6.How does Aetrix verify that SMAJ10AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMAJ10AHM3/I 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 SMAJ10AHM3/I meets industry standards.
7.What is the process for return or replacement of SMAJ10AHM3/I?
All SMAJ10AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ10AHM3/I, 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 SMAJ10AHM3/I part is unused and in its original packaging.
Return procedure for SMAJ10AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ10AHM3/I Tags
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