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Vishay General Semiconductor - Diodes Division SMBJ17A-M3/52
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- Part No.:
- SMBJ17A-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ17A-M3/52.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,565
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Product details
Overview
SMBJ17A-M3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection of sensitive electronics. It features a 17 V standoff voltage (VWM), 18.9–20.9 V breakdown range at 1 mA, clamps transients to ≤27.6 V at 21.7 A peak pulse current (10/1000 µs), and delivers 600 W peak pulse power - deployed on power rails and signal lines in industrial motor drives and automotive body control modules.
For engineers reviewing the SMBJ17A-M3/52 datasheet, SMBJ17A-M3/52 pinout, SMBJ17A-M3/52 application, or SMBJ17A-M3/52 equivalent, key selection criteria include its unidirectional polarity, SMB (DO-214AA) package thermal resistance (RθJA = 100 °C/W), 1.0 µA max reverse leakage at VWM, and AEC-Q101 qualification eligibility via HM3 suffix variants.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, entering avalanche conduction when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling fast response (<1 ns) to ESD and lightning-induced surges.
Designed for surface-mount assembly on standard PCB copper pads (0.2" × 0.2"), it supports repetitive surge duty cycles up to 0.01% and withstands peak forward surge current of 100 A (8.3 ms half-sine) - critical for protecting MOSFET gates and microcontroller I/O in harsh electrical environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse operating voltage before clamping begins |
| VBR @ IT=1 mA | 18.9–20.9 V - precise breakdown threshold defining turn-on sensitivity |
| VC @ IPPM | ≤27.6 V - clamped voltage during 21.7 A transient, limiting stress on downstream ICs |
| PPPM | 600 W - peak pulse power handling capability per 10/1000 µs waveform |
| IPPM | 21.7 A - maximum non-repetitive surge current the device safely diverts |
| RθJA | 100 °C/W - thermal resistance from junction to ambient, guiding heatsinking requirements |
| Package | SMB (DO-214AA) - low-profile, automated-placement compatible outline with matte tin leads |
Pinout & Package
Two-terminal unidirectional TVS diode in SMB (DO-214AA) package. Cathode identified by molded band; anode is unmarked end. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts avalanche current to ground during overvoltage |
| Anode | Reference return path | Typically tied to system ground or low-impedance return plane for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables reliable suppression of high-energy transients without failure in industrial power supplies |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes voltage overshoot across protected ICs, preserving margin for 3.3 V or 5 V logic |
| 1.0 µA max reverse leakage at VWM | Prevents standby power loss and false triggering in battery-powered sensor nodes |
| MSL Level 1 (260 °C peak reflow) | Supports lead-free SMT assembly without moisture-related popcorn cracking |
| Halogen-free, RoHS-compliant (M3 suffix) | Fulfills environmental compliance for global industrial and automotive OEM programs |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate drivers and feedback sensors against inductive kickback from brushed DC motors. IC Role / Device Role / Timing Role: Unidirectional TVS placed across MOSFET gate-source and supply rails to clamp switching spikes. Use Value: Limits transient voltage to ≤27.6 V, preventing gate oxide rupture in 30 V-rated logic-level MOSFETs. | Use Scenario: Shielding LIN bus transceivers and microcontroller I/O from load dump and jump-start surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V power input and bidirectional data lines. Use Value: Withstands 100 A surge (8.3 ms) and clamps 600 W transients without degradation in underhood temperature cycling. |
| Consumer Power Adapters | Telecom Base Station Power Supplies |
Use Scenario: Input-stage surge protection in universal-input AC-DC adapters subject to line transients. IC Role / Device Role / Timing Role: Primary-side TVS between bridge rectifier output and bulk capacitor. Use Value: Fast <1 ns response captures high-dV/dt events before upstream fuses open, maintaining system uptime. | Use Scenario: DC input rail protection in 48 V telecom rectifiers exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Parallel-connected TVS on -48 V return path and hot-swap controller inputs. Use Value: 21.7 A peak current rating ensures single-device coverage of IEC 61000-4-5 Level 4 (4 kV) test pulses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17CA-M3/52 | Bidirectional variant; symmetric breakdown (±18.9–20.9 V); no polarity marking | Required for AC-coupled or differential signal lines (e.g., RS-485, CAN) where polarity reversal occurs | Select SMBJ17CA-M3/52 only when bidirectional clamping is mandated by signal topology. |
| SMAJ17A-M3 | Lower 400 W PPPM; SMA package (smaller footprint, higher RθJA = 140 °C/W) | Suitable for space-constrained consumer PCBs with lower surge exposure (IEC 61000-4-2 Level 3) | Choose SMAJ17A-M3 only if board area is critical and peak surge energy remains below 400 W. |
Compared with SMBJ17A-M3/52, the SMBJ17CA-M3/52 adds bidirectional symmetry at identical clamping performance but removes polarity dependency, while the SMAJ17A-M3 reduces footprint and power rating - making SMBJ17A-M3/52 optimal for industrial-grade 600 W surge immunity in SMB-layout designs.
Availability
SMBJ17A-M3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supplies requiring stable component supply with halogen-free compliance and MSL Level 1 reflow capability.
Supply support for SMBJ17A-M3/52 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 and application-specific performance.
The SMBJ series is engineered for high-energy transient suppression in demanding environments - targeting automotive, industrial, and telecom systems where robustness against load dump, ESD, and lightning surges is mandatory.
FAQ
What is the maximum clamping voltage of SMBJ17A-M3/52 under rated surge conditions?
The SMBJ17A-M3/52 clamps to a maximum of 27.6 V when subjected to its rated 21.7 A peak pulse current (10/1000 µs waveform). This value is measured at the device terminals under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during transient events. The SMBJ17A-M3/52 maintains this clamping performance across its qualified operating temperature range.
Is SMBJ17A-M3/52 suitable for automotive applications?
SMBJ17A-M3/52 itself is commercial-grade (M3 suffix), but Vishay offers AEC-Q101-qualified versions under HM3 suffix (e.g., SMBJ17A-HM3/52). For automotive use, specify the HM3 variant to ensure qualification for underhood temperature cycling, humidity resistance, and mechanical shock - the SMBJ17A-M3/52 meets all electrical specs required, but lacks formal automotive qualification unless ordered with HM3.
How does the SMBJ17A-M3/52 differ from the SMBJ17CA-M3/52?
The SMBJ17A-M3/52 is unidirectional with cathode marking and conducts only in reverse bias, while the SMBJ17CA-M3/52 is bidirectional with symmetric breakdown in both polarities and no polarity marking. Both share identical VWM, VBR, VC, and PPPM ratings, but the SMBJ17CA-M3/52 is required for AC signals or differential buses where voltage reversals occur - the SMBJ17A-M3/52 must be oriented correctly in DC circuits.
What is the thermal resistance and power derating behavior of SMBJ17A-M3/52?
The SMBJ17A-M3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads. Its 5.0 W steady-state power dissipation derates linearly above 25 °C ambient, reaching zero at 150 °C junction temperature. Derating follows Figure 2 in Vishay document 88392, ensuring safe operation under sustained power dissipation in enclosed industrial enclosures.
Does SMBJ17A-M3/52 require special PCB layout considerations?
Yes - the SMBJ17A-M3/52 requires minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 600 W pulse power and thermal performance. Trace inductance must be minimized between the device and protected node; short, wide traces and direct grounding reduce clamping voltage overshoot. Avoid thermal reliefs on pads, and ensure solder mask opening matches pad size to maximize copper thermal mass for the SMBJ17A-M3/52.
SMBJ17A-M3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- 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):
- 21.7A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
SMBJ17A-M3/52 FAQ
1.How can I place an order for SMBJ17A-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ17A-M3/52 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 SMBJ17A-M3/52 reliable?
The price and inventory of SMBJ17A-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ17A-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ17A-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ17A-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ17A-M3/52?
SMBJ17A-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ17A-M3/52 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 SMBJ17A-M3/52?
For technical support, including SMBJ17A-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ17A-M3/52 requirements.
6.How does Aetrix verify that SMBJ17A-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ17A-M3/52 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 SMBJ17A-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ17A-M3/52?
All SMBJ17A-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ17A-M3/52, 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 SMBJ17A-M3/52 part is unused and in its original packaging.
Return procedure for SMBJ17A-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ17A-M3/52 Tags
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