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Vishay General Semiconductor - Diodes Division SMAJ16AHM3_A/I
- Part No.:
- SMAJ16AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ16AHM3_A/I.pdf
- Description:
- TVS DIODE 16VWM 26VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,199
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Product details
Overview
SMAJ16AHM3_A/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 16 V stand-off voltage (VWM), 26.0 V maximum clamping voltage (VC) at 15.4 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 μs waveform), targeting protection of MOSFETs, ICs, and sensor interfaces in automotive and industrial systems.
For engineers reviewing the SMAJ16AHM3_A/I datasheet, SMAJ16AHM3_A/I pinout, SMAJ16AHM3_A/I application, or SMAJ16AHM3_A/I equivalent, this device delivers verified AEC-Q101 qualification, halogen-free RoHS compliance, and MSL Level 1 moisture sensitivity - critical for automotive-grade board-level ESD and surge immunity design.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging a glass-passivated silicon junction for stable breakdown behavior. Its 17.8–19.7 V breakdown voltage (VBR) at 1.0 mA test current ensures precise triggering above the 16 V operating rail while maintaining low leakage (<1.0 μA at VWM).
Thermally, it exhibits RθJA = 120 °C/W and RθJL = 30 °C/W, enabling reliable operation up to +150 °C junction temperature. The 40 A IFSM rating supports robust handling of 8.3 ms half-sine surges - essential for load-dump and inductive switching event suppression.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 16 V - Maximum continuous reverse working voltage before clamping begins; sets upper limit for protected circuit's normal operating voltage. |
| VC @ IPPM | 26.0 V - Clamped voltage during 15.4 A 10/1000 μs transient; defines worst-case overvoltage seen by downstream ICs or MOSFETs. |
| IPPM | 15.4 A - Peak surge current capability under standard 10/1000 μs waveform; determines minimum transient energy (≈400 W × 1 ms) the device can absorb. |
| VBR min/max | 17.8 V / 19.7 V - Breakdown voltage range at 1.0 mA; ensures consistent turn-on threshold across production lots and temperature. |
| PPPM | 400 W - Peak pulse power rating (10/1000 μs); defines transient energy handling capacity without degradation. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments and high-ambient industrial enclosures. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 5.0 mm × 5.0 mm copper pad thermal requirement; compatible with automated reflow assembly. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, MSL Level 1 per J-STD-020, LF peak 260 °C. Cathode identified by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration; conducts during forward surge events. |
| Cathode | Clamping terminal | Connected to protected line (e.g., 16 V supply rail); initiates avalanche breakdown when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensors, meeting stress-test requirements for temperature cycling, HTRB, and ESD. |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-20D and EU RoHS Directive 2011/65/EU; eliminates brominated flame retardants for safer end-of-life processing. |
| 400 W peak pulse power | Handles ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 2a (load dump) transients without failure in properly laid-out PCBs. |
| Low clamping ratio (VC/VWM = 1.625) | Minimizes overvoltage stress on protected components compared to higher-ratio TVS devices, improving system reliability margin. |
| Fast response time (<1 ps) | Activates within picoseconds of overvoltage onset - faster than typical IC internal protection - ensuring primary defense against ESD and fast transients. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load-dump transients (up to 35 V, 100 ms) on 12 V battery-fed ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Primary clamping element placed between battery input and DC-DC converter input stage. Use Value: Limits voltage excursion to ≤26.0 V during 15.4 A surge, preventing damage to upstream regulators and microcontrollers. | Use Scenario: Protecting analog front-end inputs of 4–20 mA current-loop sensors exposed to field wiring surges. IC Role / Device Role / Timing Role: Unidirectional shunt clamp on sensor supply line, positioned before precision op-amp input stage. Use Value: Maintains signal integrity by clamping transients below 26.0 V while adding <1.0 μA leakage at 16 V nominal operation. |
| Consumer Device USB Port Protection | MOSFET Gate Driver Line Protection |
Use Scenario: Safeguarding USB VBUS line in portable docking stations against ESD and hot-plug overshoot. IC Role / Device Role / Timing Role: Standoff-clamp TVS placed directly at USB connector, parallel to VBUS trace. Use Value: Responds in <1 ps to ±8 kV contact ESD (IEC 61000-4-2), limiting voltage to 26.0 V and preserving USB PHY functionality. | Use Scenario: Shielding high-side N-channel MOSFET gate drivers from Miller-induced voltage spikes during switching. IC Role / Device Role / Timing Role: Clamp connected between gate and source, referenced to driver IC output node. Use Value: Prevents gate oxide breakdown by capping transient peaks at 26.0 V, supporting 100% duty-cycle robustness in motor drives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ16AHE3_A/I | Same electrical specs and package, but RoHS-compliant without halogen-free certification; no AEC-Q101 qualification. | Approved for commercial/industrial use only; not validated for automotive temperature cycling or humidity testing. | Select when halogen content is unrestricted and automotive qualification is unnecessary. |
| SMAJ16A-M3/5A | Identical VWM, VC, and PPPM; same halogen-free formulation, but packaged in 13" reel (7500 pcs) vs. I-tape (7500 pcs); no AEC-Q101 marking. | Intended for high-volume industrial manufacturing; lacks automotive traceability documentation and qualification evidence. | Choose for cost-sensitive, non-automotive volume production where full AEC-Q101 audit trail is not required. |
Compared with SMAJ16AHM3_A/I, SMAJ16AHE3_A/I offers identical performance without halogen-free assurance or automotive qualification, while SMAJ16A-M3/5A provides equivalent surge handling in a different packaging format but omits AEC-Q101 validation - making SMAJ16AHM3_A/I the sole option fully aligned with Tier-1 automotive supply chain requirements.
Availability
SMAJ16AHM3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and consumer power interface designs requiring stable component supply with guaranteed AEC-Q101 compliance and halogen-free material content.
Supply support for SMAJ16AHM3_A/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, and protection devices with emphasis on reliability, thermal performance, and automotive-grade validation.
The SMAJ series was developed specifically for board-level transient suppression in harsh environments - delivering high-power clamping in compact surface-mount packages for automotive, industrial, and telecom infrastructure applications.
FAQ
What is the maximum clamping voltage of the SMAJ16AHM3_A/I under a 10/1000 μs surge?
The SMAJ16AHM3_A/I has a maximum clamping voltage (VC) of 26.0 V when subjected to its rated peak pulse current of 15.4 A using the standardized 10/1000 μs waveform. This value is measured per JEDEC standards and guarantees that downstream components experience no more than 26.0 V during such transients - a critical parameter for protecting 16 V-rated ICs and MOSFETs. The SMAJ16AHM3_A/I maintains this clamping performance across its full operating temperature range.
Is SMAJ16AHM3_A/I qualified for automotive applications?
Yes, SMAJ16AHM3_A/I is AEC-Q101 qualified, meaning it has passed rigorous stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD robustness required for automotive electronic modules. The "HM3" suffix explicitly denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. This makes SMAJ16AHM3_A/I suitable for use in engine control units, body electronics, and ADAS sensor subsystems where automotive-grade reliability is mandatory.
What is the standoff voltage rating of SMAJ16AHM3_A/I, and how does it relate to system design?
The SMAJ16AHM3_A/I has a standoff voltage (VWM) of 16 V - the maximum continuous reverse voltage it can block without entering avalanche conduction. In system design, this means the device is intended for circuits operating up to 16 V nominal, such as 12 V automotive rails or industrial 15 V supplies. Exceeding VWM risks premature leakage or thermal runaway; therefore, SMAJ16AHM3_A/I must be selected only where the system's steady-state voltage remains ≤16 V, with sufficient margin below VBR (17.8–19.7 V) to avoid false triggering.
Does SMAJ16AHM3_A/I have a bidirectional variant, and how does it differ?
No, SMAJ16AHM3_A/I is strictly unidirectional, indicated by the "A" suffix and cathode band marking. Its bidirectional counterpart is SMAJ16CA (not HM3/AEC-Q101 qualified), which clamps symmetrically in both directions and lacks polarity marking. The unidirectional SMAJ16AHM3_A/I offers lower leakage (<1.0 μA at VWM) and tighter VBR tolerance versus bidirectional versions, making it preferred for DC power rail protection where polarity is fixed and leakage sensitivity is high - unlike SMAJ16CA, which suits AC-coupled signal lines or floating buses.
What thermal derating applies to SMAJ16AHM3_A/I above 25 °C ambient?
SMAJ16AHM3_A/I follows standard thermal derating per Figure 2 in its datasheet: peak pulse power (PPPM) decreases linearly above TA = 25 °C, reaching ~300 W at +78 °C and further reducing beyond that point. Its RθJA of 120 °C/W assumes minimum recommended 0.2" × 0.2" copper pads per terminal; inadequate copper area increases junction temperature and accelerates derating. For sustained operation, ensure TJ stays ≤+150 °C - achievable with proper layout and airflow, especially in sealed automotive enclosures.
SMAJ16AHM3_A/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 16V
- Voltage - Breakdown (Min):
- 17.8V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- Current - Peak Pulse (10/1000µs):
- 15.4A
- 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)
SMAJ16AHM3_A/I FAQ
1.How can I place an order for SMAJ16AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ16AHM3_A/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 SMAJ16AHM3_A/I reliable?
The price and inventory of SMAJ16AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ16AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ16AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ16AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ16AHM3_A/I?
SMAJ16AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ16AHM3_A/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 SMAJ16AHM3_A/I?
For technical support, including SMAJ16AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ16AHM3_A/I requirements.
6.How does Aetrix verify that SMAJ16AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ16AHM3_A/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 SMAJ16AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ16AHM3_A/I?
All SMAJ16AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ16AHM3_A/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 SMAJ16AHM3_A/I part is unused and in its original packaging.
Return procedure for SMAJ16AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ16AHM3_A/I Tags
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