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Vishay General Semiconductor - Diodes Division SMBJ17D-M3/I
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- Part No.:
- SMBJ17D-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ17D-M3/I.pdf
- Description:
- TVS DIODE 17VWM 27.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,168
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Product details
Overview
SMBJ17D-M3/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping inductive switching transients and ESD events on power and signal lines. It features a 17 V stand-off voltage (VWM), 19.2–20.6 V breakdown voltage (VBR) at 1 mA, 27.2 V maximum clamping voltage (VC) at 22.1 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform.
For engineers reviewing the SMBJ17D-M3/I datasheet, SMBJ17D-M3/I pinout, SMBJ17D-M3/I application, or SMBJ17D-M3/I equivalent, key selection criteria include unidirectional polarity, ±3.5 % VBR tolerance, low leakage (<0.5 μA at VWM), M3 halogen-free RoHS-compliant construction, and compatibility with automated SMT placement on industrial-grade PCBs.
Technical Context
This TVS diode operates as a voltage-clamping protection device placed in parallel with sensitive circuit nodes. Its silicon avalanche structure enables sub-nanosecond response to transients, with clamping action triggered when reverse voltage exceeds VBR, limiting downstream voltage to ≤27.2 V at rated IPPM.
Thermal performance is defined by RθJA = 125 °C/W (on minimum pad) and RθJM = 20 °C/W, supporting operation from –55 °C to +150 °C junction temperature. Power derating begins above 25 °C ambient, with 5.0 W dissipation allowed at TM = 50 °C and 1.0 W at TA = 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 19.2 V / 20.6 V at 1 mA - Tight ±3.5 % tolerance ensures predictable turn-on across production lots |
| VC @ IPPM | 27.2 V at 22.1 A - Clamped voltage during 10/1000 μs surge, defining worst-case stress on protected ICs |
| PPPM | 600 W - Peak transient energy absorption capability under standardized 10/1000 μs waveform |
| ID @ VWM | <0.5 μA - Ultra-low leakage preserves signal integrity and minimizes standby power loss |
| Package | SMB (DO-214AA) - Surface-mount outline with 2.20 mm max height, optimized for automated pick-and-place |
| MSL Level | Level 1 per J-STD-020 - No floor life limitation; supports reflow up to 260 °C peak |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, cathode indicated by band on one end. Complies with UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or lower-potential rail in unidirectional configuration |
| Cathode (banded end) | High-side connection point | Connected to protected line (e.g., 12 V supply or data line); reverse-biased during normal operation |
Key Features
| Feature | Design Value |
|---|---|
| ±3.5 % VBR tolerance | Enables precise overvoltage threshold control without margin stacking in safety-critical designs |
| 600 W PPPM (10/1000 μs) | Handles automotive load-dump surges and industrial relay-switching transients without degradation |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD >15 kV contact discharge) |
| M3 suffix compliance | Guarantees halogen-free, RoHS-compliant, industrial-grade reliability with JESD 201 Class 2 whisker resistance |
| MSL Level 1 | Eliminates bake requirements and moisture sensitivity handling-direct placement after dry pack opening |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V power rails in body control modules against ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 2a (load dump). IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery feed and LDO input to clamp transients before regulation. Use Value: Limits voltage to ≤27.2 V during 22.1 A surge, preventing LDO overvoltage failure and ensuring system reset integrity. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) of pressure sensors exposed to field wiring faults. IC Role / Device Role / Timing Role: Bidirectional-capable layout used unidirectionally across sensor supply and return paths to suppress common-mode surges. Use Value: Sub-ns response and <0.5 μA leakage preserve mA-level accuracy while surviving 1 kV ring wave transients. |
| Telecom DC Power Input | Consumer USB Port ESD Protection |
|
Use Scenario: Front-end protection on –48 V telecom rectifier outputs subject to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary clamping device mounted directly at connector entry point, upstream of DC/DC converter. Use Value: 600 W rating and 27.2 V VC enable robust pass/fail compliance at 2 kV line-earth test level without derating. |
Use Scenario: Secondary-level ESD protection on VBUS line of USB 2.0 host ports in set-top boxes and smart displays. IC Role / Device Role / Timing Role: Unidirectional TVS placed between USB connector and port controller to shunt HBM ±8 kV discharges. Use Value: Low capacitance (typ. 150 pF at 0 V) avoids signal integrity degradation while clamping to safe levels below USB PHY limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17A-M3/I | Bidirectional variant; symmetric VBR (19.2–20.6 V) in both polarities; same VC and PPPM | Required where AC-coupled or floating lines need protection against both positive and negative transients | Select SMBJ17A-M3/I only if bidirectional clamping is mandated; SMBJ17D-M3/I is optimal for DC rails with defined polarity |
| SMAJ17A-M3/A | Lower PPPM (400 W), larger VBR tolerance (±5 %), SMA package (smaller footprint, higher RθJA = 150 °C/W) | Suitable for space-constrained consumer designs with lower surge exposure (e.g., IEC 61000-4-2 Level 3) | Choose SMAJ17A-M3/A only when board area is critical and 400 W surge rating suffices; SMBJ17D-M3/I delivers 50 % higher energy handling |
Compared with SMBJ17A-M3/I and SMAJ17A-M3/A, the SMBJ17D-M3/I provides superior unidirectional surge immunity (600 W), tighter VBR control (±3.5 %), and lower thermal resistance-making it preferred for industrial and automotive power-line protection where reliability under repeated transients is essential.
Availability
SMBJ17D-M3/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, telecom DC inputs, and consumer USB protection requiring stable component supply across high-volume production cycles.
Supply support for SMBJ17D-M3/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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for industrial, automotive, and computing markets.
The SMBJ series is engineered for robust transient suppression in harsh environments, targeting applications demanding high surge immunity, tight parametric tolerances, and long-term stability under thermal cycling.
FAQ
What is the maximum clamping voltage of SMBJ17D-M3/I at its rated peak pulse current?
The SMBJ17D-M3/I has a maximum clamping voltage (VC) of 27.2 V when subjected to its rated peak pulse current (IPPM) of 22.1 A under the standard 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is measured per ANSI/IEEE C62.35. The SMBJ17D-M3/I maintains this clamping performance across its full operating temperature range.
Is SMBJ17D-M3/I suitable for protecting 12 V automotive systems against load dump?
Yes, SMBJ17D-M3/I is commonly deployed for 12 V automotive load dump protection. With a 17 V stand-off voltage (VWM) and 27.2 V clamping voltage, it safely limits transients exceeding 24 V-well within ISO 7637-2 Pulse 5a requirements. Its 600 W peak pulse power rating and M3 industrial-grade construction make SMBJ17D-M3/I appropriate for under-hood ECUs and body control modules where thermal and surge robustness are critical.
Does SMBJ17D-M3/I have a bidirectional version, and how does it differ?
Yes, the bidirectional counterpart is SMBJ17A-M3/I. While both share identical breakdown (19.2–20.6 V), clamping (27.2 V), and peak power (600 W) specifications, SMBJ17A-M3/I conducts in both directions and lacks a cathode band. SMBJ17D-M3/I is unidirectional and must be oriented with the banded end toward the higher-potential line. Use SMBJ17D-M3/I for DC rails with fixed polarity; choose SMBJ17A-M3/I only when AC or floating signals require symmetrical protection.
What is the thermal resistance of SMBJ17D-M3/I, and how does it affect PCB layout?
SMBJ17D-M3/I has a typical junction-to-ambient thermal resistance (RθJA) of 125 °C/W when mounted on the minimum recommended pad layout, and 100 °C/W on a 5.0 mm × 5.0 mm copper pad. This means PCB layout directly impacts power handling: using larger copper areas reduces thermal impedance, allowing higher sustained power dissipation. For reliable operation at elevated ambient temperatures, designers should follow Vishay's recommended pad dimensions in the SMB (DO-214AA) outline drawing to avoid exceeding TJ(max) = 150 °C.
How does the M3 suffix impact the reliability and compliance of SMBJ17D-M3/I?
The M3 suffix on SMBJ17D-M3/I indicates halogen-free, RoHS-compliant construction meeting industrial-grade reliability standards-including JESD 201 Class 2 whisker resistance and MSL Level 1 moisture sensitivity. This ensures compatibility with lead-free reflow profiles (peak 260 °C), eliminates toxic halogen emissions during soldering or end-of-life processing, and guarantees long-term interconnect stability in vibration-prone or thermally cycled environments-key for SMBJ17D-M3/I deployment in automotive and industrial control systems.
SMBJ17D-M3/I 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):
- 19.2V
- Voltage - Clamping (Max) @ Ipp:
- 27.2V
- Current - Peak Pulse (10/1000µs):
- 22.1A
- 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)
SMBJ17D-M3/I FAQ
1.How can I place an order for SMBJ17D-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ17D-M3/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 SMBJ17D-M3/I reliable?
The price and inventory of SMBJ17D-M3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ17D-M3/I is usually 5 days.
3.What payment methods are accepted for SMBJ17D-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ17D-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ17D-M3/I?
SMBJ17D-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ17D-M3/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 SMBJ17D-M3/I?
For technical support, including SMBJ17D-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ17D-M3/I requirements.
6.How does Aetrix verify that SMBJ17D-M3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ17D-M3/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 SMBJ17D-M3/I meets industry standards.
7.What is the process for return or replacement of SMBJ17D-M3/I?
All SMBJ17D-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ17D-M3/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 SMBJ17D-M3/I part is unused and in its original packaging.
Return procedure for SMBJ17D-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ17D-M3/I Tags
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