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Vishay General Semiconductor - Diodes Division SMAJ16AHM3/I
- Part No.:
- SMAJ16AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ16AHM3/I.pdf
- Description:
- TVS DIODE 16VWM 26VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,795
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Product details
Overview
SMAJ16AHM3/I 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 (IPPM), and 400 W peak pulse power dissipation (10/1000 μs waveform).
For engineers reviewing the SMAJ16AHM3/I datasheet, SMAJ16AHM3/I pinout, SMAJ16AHM3/I application, or SMAJ16AHM3/I equivalent, this device serves as a halogen-free, RoHS-compliant, AEC-Q101-qualified TVS for automotive-grade circuit protection where fast response time, low incremental surge resistance, and stable clamping under repetitive transients are critical.
Technical Context
The SMAJ16AHM3/I operates as a unidirectional avalanche diode with a cathode band marking its polarity. Its breakdown voltage (VBR) is specified at 17.8–19.7 V (IT = 1.0 mA), ensuring reliable turn-on before system damage occurs. The device exhibits a temperature coefficient of VBR of +0.089 %/°C, enabling predictable performance across its –55 °C to +150 °C operating junction range.
Thermally, it delivers RθJA = 120 °C/W (typ.) and RθJL = 30 °C/W (typ.), supporting robust thermal management on standard PCB copper pads (0.2" × 0.2"). Its 40 A peak forward surge current (IFSM, 8.3 ms half-sine) and 3.3 W steady-state power dissipation (PD) confirm suitability for high-energy transient suppression without thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 16 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (min/max) | 17.8 V / 19.7 V at IT = 1.0 mA - Ensures consistent avalanche initiation across production lots and temperature. |
| VC @ IPPM | 26.0 V at 15.4 A - Clamping voltage during 10/1000 μs transient; limits downstream IC stress to safe levels. |
| PPPM | 400 W - Peak pulse power handling capability; supports IEC 61000-4-5 Level 4 surge immunity testing. |
| IFSM | 40 A - Withstands single 8.3 ms half-sine surge; protects against motor commutation spikes and relay bounce. |
| TJ max | +150 °C - Enables use in under-hood automotive environments and industrial enclosures without derating. |
| Package | SMA (DO-214AC) - Surface-mount footprint compatible with automated assembly; meets UL 94 V-0 flammability rating. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by a band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (unidirectional) | Connected to ground or low-side reference; completes clamping path during positive transients. |
| Cathode | Avalanche breakdown terminal (marked with band) | Connected to protected line (e.g., 12 V rail); initiates clamping when voltage exceeds VWM. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables compliance with IEC 61000-4-5 surge immunity up to 4 kV (line-to-earth) in compact layout. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
| Halogen-free & RoHS-compliant | Meets global environmental regulations and enables use in green manufacturing programs without material waivers. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns), improving protection margin for CMOS ICs. |
| MSL level 1 (260 °C peak reflow) | Supports standard lead-free SMT reflow profiles without moisture-related popcorning or delamination. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply lines in engine control modules from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and local regulator input to clamp surges above 16 V. Use Value: Limits clamping voltage to 26.0 V, preventing overvoltage damage to downstream LDOs and microcontrollers rated for ≤30 V absolute maximum. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) of pressure sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS connected from signal line to ground, leveraging fast response time (<1 ns) to suppress sub-microsecond ESD pulses. Use Value: Maintains signal integrity by limiting transient-induced offset shift and avoiding latch-up in op-amps and ADC drivers. |
| Consumer USB Port Surge Suppression | Telecom Line Card Transient Protection |
Use Scenario: Adding secondary surge protection on USB VBUS lines in portable docking stations exposed to hot-plug and cable coupling events. IC Role / Device Role / Timing Role: Unidirectional TVS placed after primary fuse and upstream of USB switch IC to absorb residual energy. Use Value: Withstands 400 W pulses without degradation, extending product lifetime beyond IEC 61000-4-2 Level 4 (15 kV air, 8 kV contact) requirements. | Use Scenario: Protecting Ethernet PHY interface pins on telecom base station line cards from lightning-induced surges on twisted-pair cables. IC Role / Device Role / Timing Role: TVS array component used in conjunction with common-mode chokes to divert differential-mode surge energy to ground. Use Value: Provides 26.0 V clamping at 15.4 A, ensuring PHY ICs remain within safe operating area during 10/1000 μs lightning surges per ITU-T K.21. |
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/I | RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification; same electrical specs and package. | Approved for commercial/industrial use only; not certified for automotive under-hood deployment. | Select when halogen-free content or automotive qualification is not required, and cost optimization is prioritized. |
| SMAJ16A-M3/5A | Same halogen-free, RoHS-compliant construction; differs only in packaging format (13" reel, 7500 pcs) and part suffix encoding. | No functional or application difference; identical performance and qualification status as SMAJ16AHM3/I. | Choose based on volume procurement needs and preferred tape-and-reel configuration-no design or reliability trade-offs. |
Compared with SMAJ16AHE3/I, the SMAJ16AHM3/I adds halogen-free compliance and AEC-Q101 qualification for automotive use, while SMAJ16A-M3/5A offers identical specifications in a higher-volume reel format-making SMAJ16AHM3/I optimal for AEC-Q101–mandated designs requiring halogen-free materials.
Availability
SMAJ16AHM3/I is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, consumer USB port surge suppression, and telecom line card transient protection requiring stable component supply and long-term lifecycle support.
Supply support for SMAJ16AHM3/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 validation.
The SMAJ series was engineered specifically for high-energy transient suppression in automotive, industrial, and communications systems-delivering robust 400 W surge handling in the industry-standard SMA package with AEC-Q101 qualification options.
FAQ
What is the clamping voltage of the SMAJ16AHM3/I under a 10/1000 μs surge?
The SMAJ16AHM3/I has a maximum clamping voltage (VC) of 26.0 V at 15.4 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured per JEDEC standards and ensures downstream components see no more than 26.0 V during standardized surge events. The SMAJ16AHM3/I maintains this clamping performance across its full operating temperature range and after repeated surges, provided thermal limits are respected.
Is the SMAJ16AHM3/I suitable for automotive applications?
Yes, the SMAJ16AHM3/I is AEC-Q101 qualified and explicitly designated for automotive use, as indicated by the "HM3" suffix (halogen-free, RoHS-compliant, AEC-Q101 qualified). It is validated for under-hood and chassis-mounted applications such as engine control units, body control modules, and ADAS sensor interfaces where temperature cycling, vibration, and high-energy transients are present. The SMAJ16AHM3/I meets all stress test requirements defined in AEC-Q101 Rev G.
How does the SMAJ16AHM3/I differ from the SMAJ16A-E3/61 variant?
The SMAJ16AHM3/I differs from SMAJ16A-E3/61 in three key ways: it is halogen-free (vs. standard RoHS), AEC-Q101 qualified (vs. commercial grade only), and supplied in 13" tape-and-reel (7500 pcs) with "I" packaging code (vs. 7" reel with "61" code). Electrically and thermally, both share identical VWM, VBR, VC, and PPPM specs. The SMAJ16AHM3/I is intended for automotive and green manufacturing programs where those qualifications and material attributes are mandatory.
What is the maximum operating junction temperature for the SMAJ16AHM3/I?
The SMAJ16AHM3/I has a maximum operating junction temperature (TJ) of +150 °C, as specified in its thermal characteristics table. This allows reliable operation in high-ambient environments such as automotive engine compartments or industrial control cabinets. Derating curves in the datasheet show that peak pulse power must be reduced linearly above 25 °C ambient, with full 400 W capability maintained only at TA ≤ 25 °C and proper PCB copper pad layout (0.2" × 0.2" per terminal).
Does the SMAJ16AHM3/I have polarity marking, and how is it oriented in circuit?
Yes, the SMAJ16AHM3/I features a cathode band marking on the body, indicating the cathode terminal. In circuit, the cathode connects to the line being protected (e.g., 12 V rail), and the anode connects to ground-enabling unidirectional clamping of positive-going transients. This orientation ensures the device remains non-conductive during normal operation (V < VWM = 16 V) and avalanches only when voltage exceeds VBR (17.8–19.7 V), making correct placement essential for SMAJ16AHM3/I functionality.
SMAJ16AHM3/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):
- 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/I FAQ
1.How can I place an order for SMAJ16AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ16AHM3/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/I reliable?
The price and inventory of SMAJ16AHM3/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/I is usually 5 days.
3.What payment methods are accepted for SMAJ16AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ16AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ16AHM3/I?
SMAJ16AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ16AHM3/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/I?
For technical support, including SMAJ16AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ16AHM3/I requirements.
6.How does Aetrix verify that SMAJ16AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMAJ16AHM3/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/I meets industry standards.
7.What is the process for return or replacement of SMAJ16AHM3/I?
All SMAJ16AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ16AHM3/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/I part is unused and in its original packaging.
Return procedure for SMAJ16AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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