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Vishay General Semiconductor - Diodes Division SMAJ16A-M3/61
- Part No.:
- SMAJ16A-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ16A-M3/61.pdf
- Description:
- TVS DIODE 16VWM 26VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,307
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Product details
Overview
SMAJ16A-M3/61 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), 17.8–19.7 V breakdown voltage (VBR) at 1 mA, 26.0 V maximum clamping voltage (VC) at 15.4 A peak pulse current, and 400 W peak pulse power (10/1000 μs waveform), commonly deployed to protect MOSFETs and ICs in industrial power supplies.
For engineers reviewing the SMAJ16A-M3/61 datasheet, SMAJ16A-M3/61 pinout, SMAJ16A-M3/61 application, or SMAJ16A-M3/61 equivalent, key selection criteria include its unidirectional polarity, 120 °C/W junction-to-ambient thermal resistance, halogen-free RoHS-compliant construction (M3 suffix), and suitability for automated SMT placement on PCBs with 0.2" × 0.2" copper pads per terminal.
Technical Context
This TVS diode operates as a fast-acting shunt protector: under normal bias it presents high impedance (<1 μA leakage at 16 V), then avalanches within <1 ns to clamp transient overvoltages. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance across repetitive 10/1000 μs pulses at 0.01% duty cycle.
The device is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and supports surge currents up to 40 A (8.3 ms half-sine, unidirectional only). Its SMA package enables compact board layout while maintaining 3.3 W steady-state power dissipation on infinite heatsink at 50 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 16 V - Maximum continuous reverse working voltage before significant leakage begins; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 17.8 V / 19.7 V at 1 mA - Confirmed breakdown range ensuring reliable avalanche initiation without premature conduction. |
| VC @ IPPM | 26.0 V at 15.4 A - Clamped voltage during 10/1000 μs transient; determines maximum stress imposed on protected downstream circuitry. |
| PPPM | 400 W - Peak pulse power handling capability; defines energy absorption capacity for standard lightning/surge waveforms. |
| IFSM | 40 A - Single half-sine surge current rating (8.3 ms); validates robustness against inductive switching events. |
| TJ max. | +150 °C - Maximum junction temperature; sets thermal design boundary for PCB copper pad sizing and airflow requirements. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance; used to calculate temperature rise under DC power dissipation (e.g., 3.3 W → +396 °C rise without heatsinking). |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic case with matte tin-plated leads. Cathode indicated by band; anode is unmarked end. Meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when VLINE exceeds VBR. |
| Anode (unbanded end) | Reference/ground return path | Typically tied to system ground or low-impedance return plane; completes clamping current loop during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12–24 V DC rails without derating above 78 V. |
| Glass passivated chip junction | Ensures stable VBR tolerance (±5%), low leakage drift over temperature, and long-term reliability in humid or thermally cycled environments. |
| MSL Level 1 moisture sensitivity | Allows direct placement onto reflow soldering lines without baking; compatible with standard SMT assembly processes up to 260 °C peak. |
| Halogen-free, RoHS-compliant (M3 suffix) | Fulfills environmental compliance for automotive and industrial end equipment; eliminates brominated flame retardants without sacrificing UL 94 V-0 rating. |
| Low profile SMA package | Reduces PCB footprint vs. SMB/SMBT; maintains mechanical robustness for vibration-prone applications such as motor drives and transportation electronics. |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Suppresses load-dump spikes (up to 35 V, 100 ms) and inductive kickback from relay coils in 12 V DC power distribution networks. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between input rail and chassis ground, clamping transients before they reach DC-DC converters and microcontrollers. Use Value: Limits voltage seen by downstream 3.3 V/5 V logic to ≤26.0 V, preventing latch-up or gate oxide damage in protected ICs. |
Use Scenario: Shields LIN bus transceivers and sensor interface circuits from ESD (IEC 61000-4-2 ±8 kV contact) and ISO 7637-2 pulse 1/2a transients. IC Role / Device Role / Timing Role: Fast-response TVS mounted directly at connector entry point, providing sub-1 ns response to divert ESD current away from sensitive analog front-ends. Use Value: Maintains signal integrity on 19.2 kbps LIN lines by limiting transient overshoot to <26 V, avoiding false triggering or communication dropout. |
| Consumer Appliance Motor Drive | Telecom PoE Interface Protection |
|
Use Scenario: Absorbs back-EMF from brushed DC motors in washing machines and HVAC blowers during commutation and sudden stop events. IC Role / Device Role / Timing Role: Placed across motor terminals or H-bridge supply rails to clamp bidirectional inductive spikes up to 400 W peak. Use Value: Prevents destructive voltage doubling on MOSFET drains, extending FET lifetime and eliminating need for snubber RC networks. |
Use Scenario: Protects IEEE 802.3af/at Power over Ethernet (PoE) data lines (pairs 1–2, 3–6) from lightning-induced surges entering via outdoor cabling. IC Role / Device Role / Timing Role: Unidirectional TVS array configured per pair, referenced to common-mode ground, clamping differential-mode surges without disrupting 100BASE-TX signaling. Use Value: Ensures <10 ns response preserves 100 MHz Ethernet eye diagram integrity while limiting common-mode surge voltage to <26 V at PHY inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ16A-E3/61 | Same electrical specs and SMA package; RoHS-compliant but contains brominated flame retardants (non-halogen-free). | Approved for commercial-grade industrial use; not qualified for halogen-free mandates in EU automotive or green-energy programs. | Select when cost sensitivity outweighs halogen-free requirement and AEC-Q101 qualification is unnecessary. |
| SMAJ16CA-M3/61 | Bidirectional variant; symmetric VBR (17.8–19.7 V) in both directions; same VC, PPPM, and package. | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN FD) where polarity reversal or differential transients occur. | Choose only if bidirectional clamping is needed; unidirectional SMAJ16A-M3/61 offers lower leakage and avoids unnecessary complexity on DC rails. |
Compared with SMAJ16A-E3/61, SMAJ16A-M3/61 adds halogen-free compliance without performance trade-offs; compared with SMAJ16CA-M3/61, it provides optimized leakage and simpler grounding for DC power rail protection, avoiding redundant bidirectional capability where not required.
Availability
SMAJ16A-M3/61 is available at Aetrix Electronics and suitable for industrial power supply protection, automotive body control modules, consumer appliance motor drives, and telecom PoE interface protection requiring stable component supply and halogen-free compliance.
Supply support for SMAJ16A-M3/61 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series is engineered for robust transient suppression in harsh environments-designed to meet AEC-Q101, UL 497B, and IEC 61000-4-x standards across automotive, industrial, and telecom infrastructure applications.
FAQ
What is the maximum clamping voltage of SMAJ16A-M3/61 under a 10/1000 μs surge?
The SMAJ16A-M3/61 exhibits 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 Figure 1 in Vishay document 88390 and defines the upper voltage limit imposed on protected circuitry during transient events. The SMAJ16A-M3/61 maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Does SMAJ16A-M3/61 meet automotive qualification standards?
The SMAJ16A-M3/61 itself is not AEC-Q101 qualified; that qualification applies only to variants with HE3 or HM3 suffixes (e.g., SMAJ16AHE3_A). However, the SMAJ16A-M3/61 shares identical electrical and thermal specifications, package, and construction with its AEC-Q101 counterparts-differing only in traceability and test reporting. For non-automotive industrial or telecom use, SMAJ16A-M3/61 delivers equivalent protection performance with halogen-free compliance.
How does the M3 suffix affect the environmental compliance of SMAJ16A-M3/61?
The M3 suffix on SMAJ16A-M3/61 denotes halogen-free, RoHS-compliant construction-specifically, absence of chlorine and bromine-based flame retardants in the molding compound while retaining UL 94 V-0 flammability rating. This satisfies strict environmental mandates in EU automotive programs (e.g., ELV Directive) and green-energy certifications. Unlike E3-suffix parts, SMAJ16A-M3/61 contains no brominated compounds, verified per Vishay's material declaration doc 99912.
What is the thermal resistance of SMAJ16A-M3/61, and how does it impact PCB layout?
The SMAJ16A-M3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value guides thermal design: for example, dissipating 1 W continuously would raise junction temperature by 120 °C above ambient. To avoid exceeding the +150 °C TJ max, designers must ensure adequate copper area, minimize trace length, and consider airflow-especially in enclosed industrial enclosures.
Can SMAJ16A-M3/61 be used in bidirectional signal line protection?
No-SMAJ16A-M3/61 is a unidirectional TVS diode, meaning it clamps only when the cathode is positive relative to the anode. For bidirectional signal lines (e.g., RS-485, CAN, USB D+/D−), the bidirectional variant SMAJ16CA-M3/61 must be used instead. Using SMAJ16A-M3/61 on AC-coupled or floating lines risks failure to clamp negative transients, potentially damaging connected ICs. Always match device polarity to circuit topology.
SMAJ16A-M3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ16A-M3/61 FAQ
1.How can I place an order for SMAJ16A-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ16A-M3/61 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 SMAJ16A-M3/61 reliable?
The price and inventory of SMAJ16A-M3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ16A-M3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ16A-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ16A-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ16A-M3/61?
SMAJ16A-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ16A-M3/61 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 SMAJ16A-M3/61?
For technical support, including SMAJ16A-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ16A-M3/61 requirements.
6.How does Aetrix verify that SMAJ16A-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ16A-M3/61 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 SMAJ16A-M3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ16A-M3/61?
All SMAJ16A-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ16A-M3/61, 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 SMAJ16A-M3/61 part is unused and in its original packaging.
Return procedure for SMAJ16A-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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