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Vishay General Semiconductor - Diodes Division SMAJ16AHM3/H
- Part No.:
- SMAJ16AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ16AHM3/H.pdf
- Description:
- TVS DIODE 16VWM 26VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,496
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Product details
Overview
SMAJ16AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 16 V stand-off voltage (VWM), 26.0 V maximum clamping voltage (VC) at 15.4 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform.
For engineers reviewing the SMAJ16AHM3/H datasheet, SMAJ16AHM3/H pinout, SMAJ16AHM3/H application, or SMAJ16AHM3/H equivalent, this part is selected for robust overvoltage protection on DC power rails and signal lines in automotive, industrial, and telecom systems where AEC-Q101 qualification, low-profile mounting, and fast response (<1 ns) are critical.
Technical Context
The SMAJ16AHM3/H operates as a unidirectional avalanche diode, conducting only in reverse bias above its breakdown voltage (VBR = 17.8–19.7 V at 1 mA), with cathode polarity marked by a band. Its clamping action limits transient-induced voltage excursions to ≤26.0 V under 15.4 A surge, enabling reliable protection of downstream MOSFETs, ICs, and sensor interfaces.
Thermally, it exhibits RθJA = 120 °C/W and RθJL = 30 °C/W, supporting operation from –55 °C to +150 °C junction temperature. The halogen-free, RoHS-compliant HM3 suffix confirms compliance with JESD201 Class 2 whisker resistance and MSL Level 1 reflow profile (peak 260 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 16 V - Maximum continuous reverse operating voltage before clamping begins; sets safe DC rail margin for 12 V systems. |
| VBR (min/max) | 17.8 V / 19.7 V at 1 mA - Confirmed breakdown range ensures predictable turn-on without premature conduction. |
| VC @ IPPM | 26.0 V at 15.4 A - Clamping voltage under full 400 W surge defines worst-case stress on protected circuitry. |
| PPPM | 400 W (10/1000 μs) - Peak pulse power rating validated per ANSI/IEEE C62.35; derates to 300 W above 78 V. |
| IFSM | 40 A (8.3 ms half-sine) - Surge current capability supports repetitive inrush or fault events without bond-wire failure. |
| TJ max | +150 °C - Maximum junction temperature enables use in under-hood automotive environments and sealed industrial enclosures. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Cathode identified by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current path terminal | Connected to system ground or lower-potential node; conducts during forward-biased ESD events (e.g., IEC 61000-4-2 contact discharge). |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V rail); avalanches into conduction when transient exceeds VWM, shunting surge current to ground. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensors requiring zero-failure reliability under thermal cycling and vibration. |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental regulations and JESD201 Class 2 whisker resistance, ensuring long-term solder joint integrity in high-reliability assemblies. |
| 400 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-to-line, 2 kV line-to-ground) without degradation when mounted per recommended 5.0 mm × 5.0 mm copper pads. |
| Fast response time (<1 ns) | Clamps transients before they propagate through PCB traces, protecting high-speed logic and analog front-ends from voltage overshoot. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp positive-going spikes above 16 V. Use Value: Limits voltage seen by downstream LDOs and microcontrollers to ≤26.0 V, preventing latch-up and gate oxide damage. | Use Scenario: Shielding 4–20 mA current loop inputs in PLC analog modules from field wiring surges. IC Role / Device Role / Timing Role: TVS connected across input terminals to absorb common-mode transients induced by nearby motor drives. Use Value: Maintains signal integrity by clamping surges within 1 ns, avoiding ADC saturation and false trip conditions. |
| Telecom DC Power Input Protection | Consumer Device USB Port Protection |
Use Scenario: Safeguarding PoE-powered network switches against Ethernet cable-induced surges. IC Role / Device Role / Timing Role: Mounted on primary-side DC input to suppress transients coupled from Ethernet magnetics or AC/DC converter faults. Use Value: Withstands repeated 400 W surges without parameter shift, ensuring multi-year field reliability in outdoor deployments. | Use Scenario: Adding secondary-level surge immunity to USB VBUS lines in smart home hubs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and ground to block positive transients while allowing normal 5 V operation. Use Value: Prevents USB controller IC damage during hot-plug events and ESD discharges, meeting IEC 61000-4-2 ±8 kV contact standard. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ16A-M3/61 | Same electrical specs and SMA package; halogen-free RoHS but not AEC-Q101 qualified. | Lacks automotive qualification; suitable for commercial/industrial use only. | Select when AEC-Q101 is not required and cost optimization is prioritized. |
| SMAJ16AHE3_A/H | Same electrical specs and SMA package; RoHS-compliant with AEC-Q101 qualification but contains halogens. | Meets automotive requirements but may conflict with halogen-free BOM mandates. | Select when automotive qualification is mandatory and halogen content is acceptable. |
Compared with SMAJ16AHM3/H, SMAJ16A-M3/61 offers identical clamping performance without automotive validation, while SMAJ16AHE3_A/H provides AEC-Q101 compliance at the expense of halogen content-making SMAJ16AHM3/H the sole option satisfying both automotive and halogen-free requirements.
Availability
SMAJ16AHM3/H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, and telecom DC power input protection requiring stable component supply and guaranteed long-term availability.
Supply support for SMAJ16AHM3/H 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, efficiency, and application-specific validation.
The SMAJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where robustness, AEC-Q101 compliance, and consistent clamping performance are non-negotiable.
FAQ
What is the clamping voltage of SMAJ16AHM3/H at its rated peak pulse current?
The SMAJ16AHM3/H has a maximum clamping voltage (VC) of 26.0 V at 15.4 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is measured with the device mounted on 5.0 mm × 5.0 mm copper pads per Vishay's test conditions. The SMAJ16AHM3/H maintains this clamping performance across its full operating temperature range.
Is SMAJ16AHM3/H qualified for automotive applications?
Yes, SMAJ16AHM3/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in the 88390 datasheet. This qualification covers stress tests including temperature cycling, humidity bias, mechanical shock, and high-temperature operating life-ensuring suitability for under-hood and chassis-mounted automotive electronics. The SMAJ16AHM3/H meets the reliability requirements for ECUs, body control modules, and ADAS sensor interfaces.
What does the "HM3" suffix indicate in SMAJ16AHM3/H?
The "HM3" suffix in SMAJ16AHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It specifies that the device uses environmentally compliant molding compounds and lead finishes, passes JESD201 Class 2 whisker resistance testing, and conforms to MSL Level 1 reflow profiles (peak 260 °C). This distinguishes SMAJ16AHM3/H from non-automotive "M3" variants and halogen-containing "HE3" versions.
How does SMAJ16AHM3/H differ from bidirectional TVS diodes like SMAJ16CA?
SMAJ16AHM3/H is unidirectional and functions only during reverse-bias overvoltage events, with polarity marked by a cathode band; SMAJ16CA is bidirectional and clamps transients of either polarity. The SMAJ16AHM3/H has lower leakage current (1.0 μA at 16 V) versus SMAJ16CA (up to 2.0 μA), and is preferred for DC power rail protection where forward conduction must be avoided. Its design avoids unintended conduction during normal forward-biased operation.
What is the thermal resistance of SMAJ16AHM3/H from junction to ambient?
The typical thermal resistance from junction to ambient (RθJA) for SMAJ16AHM3/H is 120 °C/W, measured under standard JEDEC conditions with the device mounted on minimum recommended pad layout. This value assumes no additional heatsinking and guides thermal design for sustained power dissipation up to 3.3 W. For higher-power or elevated ambient scenarios, designers should verify junction temperature using RθJL = 30 °C/W and actual board copper area, ensuring the SMAJ16AHM3/H remains below its +150 °C maximum junction temperature.
SMAJ16AHM3/H 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):
- 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/H FAQ
1.How can I place an order for SMAJ16AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ16AHM3/H 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/H reliable?
The price and inventory of SMAJ16AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ16AHM3/H is usually 5 days.
3.What payment methods are accepted for SMAJ16AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ16AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ16AHM3/H?
SMAJ16AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ16AHM3/H 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/H?
For technical support, including SMAJ16AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ16AHM3/H requirements.
6.How does Aetrix verify that SMAJ16AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMAJ16AHM3/H 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/H meets industry standards.
7.What is the process for return or replacement of SMAJ16AHM3/H?
All SMAJ16AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ16AHM3/H, 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/H part is unused and in its original packaging.
Return procedure for SMAJ16AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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