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Vishay General Semiconductor - Diodes Division SMAJ17A-M3/61
- Part No.:
- SMAJ17A-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ17A-M3/61.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,315
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Product details
Overview
SMAJ17A-M3/61 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping fast-rising voltage transients on power and signal lines. It features a 17 V stand-off voltage (VWM), 18.9–20.9 V breakdown voltage (VBR) at 1 mA, 27.6 V maximum clamping voltage (VC) at 14.5 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - ideal for protecting MOSFETs and ICs in automotive and industrial power rails.
For engineers reviewing the SMAJ17A-M3/61 datasheet, SMAJ17A-M3/61 pinout, SMAJ17A-M3/61 application, or SMAJ17A-M3/61 equivalent, this device delivers verified clamping performance, AEC-Q101 qualification eligibility (via HM3 suffix variants), halogen-free RoHS compliance, and MSL Level 1 moisture sensitivity - critical for high-reliability board-level surge protection design.
Technical Context
This unidirectional TVS diode operates as a voltage-clamping overvoltage protection device, triggered when reverse voltage exceeds its VBR threshold. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and low incremental surge resistance, enabling precise clamping within 1 ns response time.
The SMAJ17A-M3/61 is rated for 40 A non-repetitive forward surge current (IFSM), supports continuous power dissipation of 3.3 W at 50 °C ambient, and maintains operation across –55 °C to +150 °C junction temperature range - making it suitable for under-hood automotive modules and industrial motor drive control circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 18.9–20.9 V at 1 mA - Confirmed breakdown range where device enters avalanche conduction; ensures predictable turn-on behavior. |
| VC (Clamping Voltage) | 27.6 V at 14.5 A (10/1000 μs) - Peak voltage seen by protected circuit during surge; determines maximum stress on downstream components. |
| PPPM (Peak Pulse Power) | 400 W - Sustained transient energy absorption capability under standard 10/1000 μs waveform; validates robustness against IEC 61000-4-5 surges. |
| IPPM (Peak Pulse Current) | 14.5 A - Maximum surge current the device safely diverts without degradation; directly tied to PCB trace and layout current-handling needs. |
| TJmax | +150 °C - Maximum allowable junction temperature; enables use in high-ambient environments like engine control units. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 5.28 mm × 4.50 mm footprint and 2.29 mm height; compatible with automated pick-and-place and reflow. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, MSL Level 1 per J-STD-020, LF peak soldering temperature up to 260 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when VREV > VBR; polarity marking essential for correct orientation in unidirectional layout. |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane; completes clamping loop and defines reference for VC measurement. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Validated energy handling for IEC 61000-4-5 Level 4 (4 kV) surge immunity in 50 Ω source impedance systems. |
| 1 ns typical response time | Enables protection of high-speed logic and microcontroller I/O pins before damaging voltage overshoot occurs. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets IPC-1752A material declaration requirements and EU Directive 2015/863 for restricted substances. |
| Low incremental surge resistance | Minimizes VC rise under high di/dt conditions, reducing voltage overshoot beyond clamping level. |
| AEC-Q101 qualification path | Base P/NHM3_X variants are fully qualified; enables drop-in use in automotive powertrain and body electronics. |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive Control |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and inductive switching spikes in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between power rail and chassis ground to shunt transients exceeding 17 V. Use Value: Limits voltage to ≤27.6 V during 14.5 A surges, preventing damage to 36 V-rated CAN transceivers and MCU power supplies. |
Use Scenario: Safeguarding gate drivers and current-sense amplifiers in variable-frequency drives exposed to back-EMF spikes. IC Role / Device Role / Timing Role: Fast-response TVS on isolated DC bus sensing lines to clamp coupling-induced transients before they reach analog front-ends. Use Value: Sub-1 ns turn-on preserves signal integrity on ±10 V differential sense paths, avoiding false overcurrent trips. |
| Consumer Power Adapter Input Stage | Telecom Line Card Surge Protection |
|
Use Scenario: Secondary-side overvoltage suppression in USB-C PD adapters after primary-side isolation. IC Role / Device Role / Timing Role: Standoff-rated TVS on 20 V output rail to absorb residual transients escaping primary-side MOVs and Y-capacitors. Use Value: Maintains 17 V nominal operation while clamping to 27.6 V, ensuring compatibility with 30 V-rated synchronous rectifier FETs. |
Use Scenario: Front-end protection for Ethernet PHY interfaces in outdoor base station line cards subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS on DC bias lines feeding PoE injectors to prevent latch-up in IEEE 802.3af/at compliant silicon. Use Value: 400 W rating sustains multiple 10/1000 μs events without parameter shift, supporting Telcordia GR-1089-CORE compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17A-E3/61 | Same electrical specs; RoHS-compliant but contains brominated flame retardants (non-halogen-free). | Approved for commercial-grade industrial equipment where halogen-free requirement is not mandated. | Select when cost sensitivity outweighs halogen-free compliance; identical footprint and assembly process. |
| SMAJ17CA-M3/61 | Bidirectional variant with symmetric VBR (18.9–20.9 V), same VC and PPPM, but no polarity marking. | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN FD) where reverse polarity surges occur. | Choose only if bidirectional clamping is needed; not a drop-in replacement due to polarity and grounding implications. |
Compared with SMAJ17A-M3/61, the E3 variant offers identical protection performance without halogen-free assurance, while the SMAJ17CA-M3/61 provides symmetrical clamping for AC signals - neither is pin-compatible without circuit review, but both share the same SMA package and thermal profile.
Availability
SMAJ17A-M3/61 is available at Aetrix Electronics and suitable for automotive power management, industrial motor control, consumer adapter safety, and telecom line card surge protection requiring stable component supply and halogen-free compliance.
Supply support for SMAJ17A-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade qualification.
The SMAJ series is engineered for board-level transient suppression in harsh environments, targeting applications demanding high surge robustness, fast response, and AEC-Q101 readiness - especially in power distribution and interface protection.
FAQ
What is the clamping voltage of SMAJ17A-M3/61 at its rated peak pulse current?
The SMAJ17A-M3/61 has a maximum clamping voltage (VC) of 27.6 V when subjected to its rated 14.5 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMAJ17A-M3/61 maintains this clamping performance across its specified operating temperature range and is validated per IEC 61000-4-5 surge immunity test methodology.
Is SMAJ17A-M3/61 suitable for automotive applications?
SMAJ17A-M3/61 itself is not AEC-Q101 qualified, but it belongs to the SMAJ family for which Vishay offers AEC-Q101-qualified variants under the HM3 suffix (e.g., SMAJ17A-HM3_X). The SMAJ17A-M3/61 shares identical electrical characteristics, package, and thermal behavior with those qualified versions, making it suitable for prototyping and non-safety-critical automotive subsystems. For production deployment in powertrain or ADAS modules, the HM3_X variant must be specified. The SMAJ17A-M3/61 remains fully compatible with automotive PCB assembly processes including lead-free reflow.
How does the M3 suffix differ from E3 in SMAJ17A-M3/61?
The M3 suffix in SMAJ17A-M3/61 denotes halogen-free, RoHS-compliant construction using bromine- and chlorine-free flame retardants in the molding compound, whereas the E3 suffix indicates RoHS compliance without halogen-free assurance. Both meet JESD201 Class 2 whisker resistance and J-STD-020 MSL Level 1 handling requirements. Electrically and mechanically, SMAJ17A-M3/61 and SMAJ17A-E3/61 are identical - the distinction lies solely in material composition for environmental compliance. The SMAJ17A-M3/61 is preferred for products targeting EU EcoDesign or specific green procurement policies.
What is the thermal resistance of SMAJ17A-M3/61 from junction to ambient?
The typical thermal resistance from junction to ambient (RθJA) for SMAJ17A-M3/61 is 120 °C/W when mounted on the minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes still air conditions and defines the temperature rise above ambient per watt of steady-state power dissipation. For reliable long-term operation at its full 3.3 W power rating, forced airflow or additional copper area is recommended. The SMAJ17A-M3/61 also exhibits RθJL = 30 °C/W to lead, supporting thermal relief in high-current surge scenarios.
Can SMAJ17A-M3/61 be used in bidirectional signal protection?
No - SMAJ17A-M3/61 is a unidirectional TVS diode, marked with a cathode band and intended for DC-biased lines where surge polarity is known and consistent (e.g., positive power rails referenced to ground). For bidirectional signal lines such as RS-485, CAN, or AC-coupled audio, the bidirectional variant SMAJ17CA-M3/61 must be used instead. Attempting to use SMAJ17A-M3/61 on floating or AC signals risks forward conduction during negative half-cycles, potentially causing malfunction or damage. The SMAJ17A-M3/61's unidirectional architecture is fundamental to its specified VBR and VC parameters.
SMAJ17A-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):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 14.5A
- 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)
SMAJ17A-M3/61 FAQ
1.How can I place an order for SMAJ17A-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ17A-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 SMAJ17A-M3/61 reliable?
The price and inventory of SMAJ17A-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 SMAJ17A-M3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ17A-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ17A-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ17A-M3/61?
SMAJ17A-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ17A-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 SMAJ17A-M3/61?
For technical support, including SMAJ17A-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ17A-M3/61 requirements.
6.How does Aetrix verify that SMAJ17A-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ17A-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 SMAJ17A-M3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ17A-M3/61?
All SMAJ17A-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ17A-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 SMAJ17A-M3/61 part is unused and in its original packaging.
Return procedure for SMAJ17A-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ17A-M3/61 Tags
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