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Vishay General Semiconductor - Diodes Division SMBJ170AHM3/I
- Part No.:
- SMBJ170AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170AHM3/I.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,144
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Product details
Overview
SMBJ170AHM3/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 170 V standoff voltage (VWM), 189–209 V breakdown voltage (VBR) at 1 mA, 2.2 A peak pulse current (IPPM) under 10/1000 µs waveform, and clamps transients to ≤275 V at rated surge. It is used to protect MOSFETs, ICs, and sensor signal lines in industrial power supplies and telecom interfaces.
For engineers reviewing the SMBJ170AHM3/I datasheet, SMBJ170AHM3/I pinout, SMBJ170AHM3/I application, or SMBJ170AHM3/I equivalent, key selection criteria include its 600 W peak pulse power rating, unidirectional polarity with cathode band marking, AEC-Q101 qualification status (HM3 suffix), and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This TVS diode operates as a clamping device that enters avalanche conduction when reverse voltage exceeds its VBR range (189–209 V), limiting transient energy to protected downstream circuitry. Its low incremental surge resistance and fast response time (<1 ns) ensure effective suppression of inductive switching spikes and lightning-induced surges.
The SMBJ170AHM3/I is halogen-free, RoHS-compliant, and qualified to AEC-Q101 for automotive-grade reliability. Its thermal resistance (RθJA = 100 °C/W) and junction temperature limit (TJ max = 150 °C) define safe operating margins under repetitive surge conditions with appropriate PCB copper area (0.2" × 0.2") per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 189 V / 209 V at 1 mA - Confirmed breakdown threshold range defining turn-on consistency |
| VC @ IPPM | ≤275 V at 2.2 A - Clamped voltage during full-rated 10/1000 µs surge, limiting stress on protected ICs |
| PPPM | 600 W - Peak pulse power handling capability under standardized transient waveform |
| ID @ VWM | ≤1.0 µA - Ultra-low leakage ensures minimal standby power loss and signal integrity |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm max length, optimized for automated assembly |
| Polarity | Unidirectional - Cathode marked by band; blocks forward current above ~3.5 V (VF max) |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, MSL Level 1 (260 °C reflow peak), UL 94 V-0 rated compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to lower-potential side of protected line; defines directionality of clamping |
| Cathode | Avalanche conduction node / Surge return path | Banded end; sinks transient current to ground or rail during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables reliable protection against high-energy transients without degradation across >10⁴ cycles |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control units and body electronics |
| Halogen-free & RoHS-compliant | Meets global environmental compliance requirements for industrial and consumer end equipment |
| Low-profile SMB package | Reduces board space vs. SMA/SMB alternatives while maintaining thermal performance via 20 °C/W RθJL |
| Fast response time (<1 ns) | Clamps before sensitive CMOS inputs or gate drivers experience destructive overvoltage |
Applications
| Industrial Motor Drives | Telecom Power Interfaces |
|---|---|
Use Scenario: Protection of IGBT gate drivers and DC bus sensing circuits against inductive kickback during PWM switching. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between gate and source, referenced to local ground. Use Value: Limits voltage overshoot to ≤275 V, preventing gate oxide rupture in 600 V-class IGBTs while supporting 2.2 A surge current. | Use Scenario: Surge suppression on -48 V telecom power feed lines exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary front-end TVS on input rail, coordinated with secondary MOV and filter stages. Use Value: Absorbs 600 W transients without failure, maintaining system uptime in central office and remote radio head deployments. |
| Automotive Body Control Modules | Industrial Sensor Signal Conditioning |
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS connected between LIN line and chassis ground, leveraging AEC-Q101 qualification. Use Value: Survives repeated 12 V/24 V load dump events up to 35 V, ensuring CAN/LIN communication integrity in harsh environments. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA loops) from ESD and field wiring transients in factory automation. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) TVS placed at DAC output stage before connector interface. Use Value: Prevents signal offset drift and ADC saturation during 8 kV contact ESD events while preserving loop accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170AHE3/I | RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification | Suitable for commercial-grade industrial controls where automotive reliability is not required | Select when cost sensitivity outweighs halogen-free or automotive qualification needs |
| SMBJ170CAHM3/I | Bidirectional variant with same VWM (170 V); symmetrical clamping in both polarities | Required for AC-coupled or differential signal lines (e.g., RS-485, CAN FD) where polarity reversal occurs | Choose only if bidirectional protection is mandated by signal architecture |
Compared with SMBJ170AHM3/I, the HE3/I alternative trades halogen-free content and AEC-Q101 validation for lower cost, while the CAHM3/I variant adds bidirectional symmetry at the expense of unidirectional optimization-neither offers pin-to-pin replacement without circuit review.
Availability
SMBJ170AHM3/I is available at Aetrix Electronics and suitable for industrial motor drives, telecom power interfaces, automotive body control modules, and industrial sensor signal conditioning requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ170AHM3/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 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 ESD, lightning, and inductive switching is critical.
FAQ
What is the maximum clamping voltage of SMBJ170AHM3/I under rated surge conditions?
The SMBJ170AHM3/I has a maximum clamping voltage (VC) of 275 V when subjected to its rated peak pulse current (IPPM) of 2.2 A using the standard 10/1000 µs waveform. This value is measured at the device terminals and defines the upper voltage limit imposed on protected circuitry during transient events, ensuring downstream components remain within safe operating limits.
Is SMBJ170AHM3/I suitable for automotive applications?
Yes, SMBJ170AHM3/I is AEC-Q101 qualified, making it suitable for automotive applications such as body control modules, infotainment power rails, and LIN/CAN interface protection. The HM3 suffix confirms halogen-free, RoHS-compliant construction and qualification to the stress test requirements defined in AEC-Q101, including temperature cycling, humidity bias, and surge endurance.
What does the "HM3" suffix indicate in SMBJ170AHM3/I?
The "HM3" suffix in SMBJ170AHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade versions (e.g., E3 or M3) and confirms compliance with automotive reliability standards, material restrictions, and extended temperature operation up to +150 °C junction temperature.
How does SMBJ170AHM3/I differ from SMBJ170AHE3/I?
SMBJ170AHM3/I is halogen-free and AEC-Q101 qualified, whereas SMBJ170AHE3/I is RoHS-compliant but not halogen-free and lacks AEC-Q101 validation. Both share identical electrical parameters and SMB package, but SMBJ170AHM3/I meets stricter automotive and environmental requirements, making it appropriate for safety-critical or export-regulated designs.
What PCB layout guidance applies to SMBJ170AHM3/I for optimal thermal performance?
For optimal thermal performance, SMBJ170AHM3/I should be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet. This layout reduces thermal resistance (RθJA = 100 °C/W) and supports sustained power dissipation up to 5.0 W at TA = 50 °C, preventing premature thermal runaway during repetitive surge events.
SMBJ170AHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 275V
- Current - Peak Pulse (10/1000µs):
- 2.2A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMB)
SMBJ170AHM3/I FAQ
1.How can I place an order for SMBJ170AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170AHM3/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 SMBJ170AHM3/I reliable?
The price and inventory of SMBJ170AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ170AHM3/I is usually 5 days.
3.What payment methods are accepted for SMBJ170AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170AHM3/I?
SMBJ170AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170AHM3/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 SMBJ170AHM3/I?
For technical support, including SMBJ170AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170AHM3/I requirements.
6.How does Aetrix verify that SMBJ170AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ170AHM3/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 SMBJ170AHM3/I meets industry standards.
7.What is the process for return or replacement of SMBJ170AHM3/I?
All SMBJ170AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170AHM3/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 SMBJ170AHM3/I part is unused and in its original packaging.
Return procedure for SMBJ170AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170AHM3/I Tags
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Toshiba Semiconductor and Storage
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