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Vishay General Semiconductor - Diodes Division SMBJ170A-M3/52
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- Part No.:
- SMBJ170A-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170A-M3/52.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,250
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Product details
Overview
SMBJ170A-M3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 170 V standoff voltage (VWM), 189–209 V breakdown range (VBR at 1 mA), 275 V maximum clamping voltage (VC) at 2.2 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial motor drives to safeguard IGBT gate drivers against inductive switching transients.
For engineers reviewing the SMBJ170A-M3/52 datasheet, SMBJ170A-M3/52 pinout, SMBJ170A-M3/52 application, or SMBJ170A-M3/52 equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, RoHS/halogen-free compliance status, and direct alternative part comparisons for high-reliability power rail protection design.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches into low-impedance conduction to divert surge energy away from downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the 20 °C/W junction-to-lead thermal resistance supports reliable power dissipation during repetitive transients.
The device complies with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive load dump) immunity requirements when applied with appropriate PCB layout - including minimum 5.0 mm × 5.0 mm copper pads per terminal to meet specified 600 W pulse rating and thermal derating curves up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before clamping begins; defines upper limit of protected line's normal operating range. |
| VBR (min/max) | 189 V / 209 V at 1.0 mA - Confirmed breakdown threshold range; ensures predictable turn-on margin above VWM for noise immunity. |
| VC @ IPPM | 275 V at 2.2 A - Clamped voltage during full 600 W surge; determines maximum stress imposed on protected IC or MOSFET. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; validates capability to absorb common lightning-induced and inductive-switching surges. |
| IPPM | 2.2 A - Peak pulse current corresponding to VC; used with PCB trace impedance to estimate actual clamping level in system-level testing. |
| TJ max. | 150 °C - Maximum junction temperature; sets thermal design boundary for sustained surge repetition or ambient temperature derating. |
| RθJL | 20 °C/W - Junction-to-lead thermal resistance; enables accurate estimation of temperature rise under pulsed power dissipation without heatsink. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (260 °C reflow peak). Cathode indicated by band marking on case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or lowest-potential rail; establishes reference for clamping action during overvoltage events. |
| Cathode | Protected line input | Connected to line being protected (e.g., 170 V DC bus); conducts avalanche current to anode when VWM exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validated surge energy absorption capacity for industrial-grade transient immunity without degradation across 0.01% duty cycle. |
| 275 V clamping voltage at 2.2 A | Defines worst-case overvoltage seen by downstream components during full-rated surge, enabling precise margin analysis for 300 V-rated MOSFETs. |
| Glass-passivated junction | Ensures stable VBR tolerance (±5.5%) and <1.0 µA leakage at 170 V, critical for low-power standby circuits. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets IPC-1752A material declaration requirements and JEDEC J-STD-020 MSL Level 1 reflow compatibility. |
| 150 °C maximum junction temperature | Supports operation in enclosed industrial enclosures with ambient temperatures up to 85 °C when mounted on recommended 5.0 mm × 5.0 mm copper pads. |
Applications
| Industrial Motor Drive DC Bus Protection | Telecom Power Supply Input Stage |
|---|---|
|
Use Scenario: Protects 170 V DC link in servo drive inverters from voltage spikes caused by IGBT turn-off and regenerative braking. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between DC+ and ground, clamping transients within 1 ns response time. Use Value: Limits transient overshoot to ≤275 V, preventing gate oxide damage to 300 V-rated SiC MOSFETs and maintaining functional safety integrity. |
Use Scenario: Shields primary-side DC-DC converter input against induced surges from AC line transients and lightning coupling in outdoor base stations. IC Role / Device Role / Timing Role: Standoff-rated TVS on 170 V telecom rectified bus, activated only during >189 V excursions to avoid false triggering. Use Value: Sustains 600 W surge without parameter shift, ensuring long-term reliability in -40 °C to +85 °C outdoor operating environments. |
| Automotive HVAC Blower Module | Renewable Energy Solar Inverter DC Link |
|
Use Scenario: Guards 12 V–24 V boosted DC bus in vehicle cabin HVAC controllers against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS referenced to chassis ground, absorbing 8.3 ms half-sine surges per ISO 7637-2 Pulse 5a. Use Value: Withstands 100 A non-repetitive forward surge (IFSM) and maintains <1 µA leakage at 170 V, preserving battery drain budgets. |
Use Scenario: Clamps voltage spikes on 170 V PV string output during rapid cloud-edge transitions and arc-fault events in residential solar systems. IC Role / Device Role / Timing Role: High-VWM TVS placed across MPPT input stage, triggered only during rare >189 V overvoltage events. Use Value: Enables compliance with UL 1741 SA rapid shutdown requirements via predictable 275 V clamping ceiling under 600 W test conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170A-E3/52 | Same electrical specs, but RoHS-compliant with lead finish meeting JESD 22-B102; not halogen-free. | Preferred for commercial-grade designs where halogen content is unrestricted and cost sensitivity is higher. | Select when halogen-free certification is not required and standard RoHS compliance suffices. |
| SMBJ170AHM3_B/I | AEC-Q101 qualified, halogen-free, supplied in 13" tape-and-reel (3200 pcs); identical VWM, VBR, VC, PPPM. | Required for automotive OEM production where component qualification and traceability per AEC standard are mandatory. | Choose for automotive applications needing formal qualification evidence and extended reel packaging. |
Compared with SMBJ170A-M3/52, the E3 variant offers identical protection performance at lower material cost but lacks halogen-free compliance, while the HM3_B/I version adds AEC-Q101 validation and larger reel quantity - making it suitable for automotive production but over-specified for industrial power supplies.
Availability
SMBJ170A-M3/52 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, renewable energy inverters, and automotive HVAC modules requiring stable component supply with halogen-free compliance and MSL Level 1 reflow capability.
Supply support for SMBJ170A-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, MOSFETs, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting industrial automation, telecom infrastructure, and automotive subsystems where consistent clamping performance and long-term parametric stability are critical.
FAQ
What is the maximum clamping voltage of SMBJ170A-M3/52 under rated surge conditions?
The SMBJ170A-M3/52 has a maximum clamping voltage (VC) of 275 V at 2.2 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per IEC 61000-4-5 test conditions and defines the upper voltage limit imposed on protected circuitry during full-rated transient events. The SMBJ170A-M3/52 maintains this clamping performance across its full operating temperature range of -55 °C to +150 °C.
Does SMBJ170A-M3/52 meet automotive qualification standards?
No, SMBJ170A-M3/52 is a commercial-grade, halogen-free, RoHS-compliant part but is not AEC-Q101 qualified. For automotive applications requiring formal qualification, the functionally identical SMBJ170AHM3_B/I variant is available with full AEC-Q101 documentation and traceability. The SMBJ170A-M3/52 remains suitable for non-automotive industrial and telecom uses where AEC-Q101 is not mandated.
What is the thermal resistance from junction to lead for SMBJ170A-M3/52?
The SMBJ170A-M3/52 has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W, as specified in the Vishay datasheet. This parameter enables accurate estimation of junction temperature rise during pulsed power dissipation without requiring external heatsinking. The SMBJ170A-M3/52 achieves this performance using its SMB (DO-214AA) package with matte tin-plated leads solderable per J-STD-002.
How does the M3 suffix affect the environmental compliance of SMBJ170A-M3/52?
The M3 suffix on SMBJ170A-M3/52 indicates halogen-free, RoHS-compliant construction per IPC-1752A and JEDEC J-STD-020 MSL Level 1 standards. Unlike the E3 variant, M3 uses bromine- and chlorine-free molding compounds and lead finishes, satisfying strict environmental mandates for green electronics manufacturing. The SMBJ170A-M3/52 retains identical electrical performance to E3 versions while meeting tighter material restrictions.
Can SMBJ170A-M3/52 be used in bidirectional protection configurations?
No, SMBJ170A-M3/52 is a unidirectional TVS diode, identifiable by its cathode band marking. Bidirectional operation requires the CA-suffixed variant (e.g., SMBJ170CA). Using SMBJ170A-M3/52 in reverse-biased configurations risks permanent failure due to forward conduction during negative transients. The SMBJ170A-M3/52 must be oriented with cathode toward the protected line and anode to ground for correct unidirectional clamping.
SMBJ170A-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):
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ170A-M3/52 FAQ
1.How can I place an order for SMBJ170A-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170A-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 SMBJ170A-M3/52 reliable?
The price and inventory of SMBJ170A-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 SMBJ170A-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ170A-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170A-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170A-M3/52?
SMBJ170A-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170A-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 SMBJ170A-M3/52?
For technical support, including SMBJ170A-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170A-M3/52 requirements.
6.How does Aetrix verify that SMBJ170A-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ170A-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 SMBJ170A-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ170A-M3/52?
All SMBJ170A-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170A-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 SMBJ170A-M3/52 part is unused and in its original packaging.
Return procedure for SMBJ170A-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170A-M3/52 Tags
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