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Vishay General Semiconductor - Diodes Division SMBJ170CAHM3_A/H
- Part No.:
- SMBJ170CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170CAHM3_A/H.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBJ170CAHM3_A/H from Vishay General Semiconductor is a bidirectional surface-mount 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, 600 W peak pulse power (10/1000 µs), clamping voltage of 275 V at 2.2 A IPPM, and operates from –55 °C to +150 °C junction temperature - deployed in industrial motor drives, telecom line interfaces, and automotive sensor signal lines.
For engineers reviewing the SMBJ170CAHM3_A/H datasheet, SMBJ170CAHM3_A/H pinout, SMBJ170CAHM3_A/H application, or SMBJ170CAHM3_A/H equivalent, this page delivers verified electrical specs, thermal derating behavior, clamping performance under surge, AEC-Q101 qualification status, and real-world design implications for ESD and lightning-induced transients.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to achieve fast response (<1 ns), low clamping ratio (VC/VBR ≈ 1.45), and stable surge handling across repetitive 10/1000 µs waveforms at 0.01% duty cycle. Its symmetrical I-V characteristics enable identical protection in both polarities without polarity-sensitive layout constraints.
Thermal design relies on RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), with derating above 25 °C per Fig. 2; maximum junction temperature is 150 °C. The device meets MSL Level 1 (JEDEC J-STD-020) and is halogen-free, RoHS-compliant, and AEC-Q101 qualified per ordering suffix HM3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 170 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 189–209 V at 1 mA - Confirmed minimum/maximum breakdown range ensuring reliable turn-on during transients. |
| VC (Clamping Voltage) | 275 V at IPPM = 2.2 A - Peak voltage seen by protected circuit during 10/1000 µs surge; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy absorption capability for standardized lightning/surge immunity testing (IEC 61000-4-5). |
| ID (Reverse Leakage) | 1.0 µA max. at VWM - Low leakage preserves signal integrity and minimizes standby power loss in high-impedance nodes. |
| TJ max. | +150 °C - Enables operation in under-hood automotive or industrial environments without thermal shutdown. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD (HBM ≥ 8 kV). |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward conduction (unidirectional mode) | Not functional in bidirectional operation; symmetric terminal for AC-coupled or floating-line protection. |
| Cathode | Current exit point in forward conduction (unidirectional mode) | Not functional in bidirectional operation; symmetric terminal - both ends behave identically under reverse or forward surge. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 Level 3 (1 kV line-to-ground) without external series impedance. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot during fast transients, reducing risk of latch-up or gate oxide damage in protected ICs. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control units, ADAS camera links, and infotainment data buses. |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
| Halogen-free & RoHS-compliant | Fulfills environmental compliance mandates for EU, China RoHS, and automotive ELV directives without performance trade-offs. |
Applications
| Industrial Motor Drives | Telecom Line Interfaces |
|---|---|
Use Scenario: Protection of encoder feedback lines and gate driver inputs against inductive kickback from 24 V DC motors. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly across differential RS-485 or incremental encoder inputs. Use Value: Limits transient excursions to ≤275 V, preventing damage to isolated digital isolators and microcontroller GPIOs rated for 3.3 V or 5 V logic. |
Use Scenario: Surge suppression on POTS or xDSL line interface circuits exposed to lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Primary-level TVS mounted at connector entry point, shunting energy before hybrid transformer or line driver IC. Use Value: Absorbs 600 W pulses without degradation, maintaining signal integrity up to 2 MHz while meeting GR-1089-CORE telecom surge requirements. |
| Automotive Sensor Networks | Consumer Appliance Control Boards |
Use Scenario: ESD and load-dump protection for LIN bus nodes in body control modules (e.g., door lock actuators, ambient light sensors). IC Role / Device Role / Timing Role: Bidirectional clamp on LIN physical layer, placed between transceiver and connector. Use Value: Withstands ±30 kV contact ESD (IEC 61000-4-2) and 12 V load-dump spikes (ISO 7637-2 Pulse 5a), preserving communication uptime. |
Use Scenario: Overvoltage protection on microcontroller reset lines and button debounce inputs in washing machine main control boards. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) TVS placed across 3.3 V reset rail to prevent false resets during relay switching noise. Use Value: Prevents system lockup during 100 V/1 µs fast transients induced by solenoid valve actuation, with no impact on static reset timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170CAHE3_A/H | Same electrical specs; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification. | Suitable for commercial/industrial use only; not approved for automotive production. | Select when halogen-free content or automotive qualification is not required; lower cost alternative. |
| SMAJ170CAHM3_A/H | Same VWM/VBR/VC ratings but lower PPPM (400 W vs. 600 W); SMA package (smaller footprint, higher RθJA). | Acceptable for lower-energy surges (e.g., IEC 61000-4-2 ESD only); unsuitable for IEC 61000-4-5 line surges. | Choose only if board space is constrained and surge threat level is limited to ESD or low-energy switching noise. |
Compared with SMBJ170CAHM3_A/H, the HE3 variant trades halogen-free construction and AEC-Q101 validation for cost savings in non-automotive systems, while the SMAJ170CAHM3_A/H reduces surge capacity and thermal performance due to smaller package size - neither is a drop-in replacement without verifying layout and test compliance.
Availability
SMBJ170CAHM3_A/H is available at Aetrix Electronics and suitable for industrial motor drives, telecom line interfaces, automotive sensor networks, and consumer appliance control boards requiring stable component supply, long-term lifecycle support, and AEC-Q101 assurance.
Supply support for SMBJ170CAHM3_A/H 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, efficiency, and application-specific optimization.
The SMBJ series targets high-energy transient suppression in harsh environments - engineered for automotive, industrial, and telecom applications where robustness, repeatable clamping, and qualification rigor are mandatory.
FAQ
What is the clamping voltage of SMBJ170CAHM3_A/H at its rated peak pulse current?
The SMBJ170CAHM3_A/H has a maximum clamping voltage (VC) of 275 V at its peak pulse current (IPPM) of 2.2 A, measured under the standardized 10/1000 µs waveform. This value ensures protected downstream components - such as RS-485 transceivers or microcontroller I/O pins - experience no more than 275 V during surge events, aligning with IEC 61000-4-5 immunity requirements. The SMBJ170CAHM3_A/H maintains this clamping performance across its full operating temperature range.
Is SMBJ170CAHM3_A/H suitable for automotive applications?
Yes, SMBJ170CAHM3_A/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and Vishay's documentation. It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and human-body-model ESD (≥8 kV). This makes SMBJ170CAHM3_A/H appropriate for automotive subsystems like LIN bus nodes, body control modules, and ADAS sensor interfaces where reliability under thermal and electrical stress is critical.
How does the bidirectional configuration of SMBJ170CAHM3_A/H affect PCB layout?
The SMBJ170CAHM3_A/H has no polarity marking and exhibits symmetrical I-V characteristics, allowing placement across AC-coupled or floating signal paths without orientation constraints. Unlike unidirectional TVS diodes, it eliminates the need for cathode alignment checks during automated assembly and avoids misplacement errors in differential or transformer-isolated interfaces. This symmetry simplifies layout for telecom line drivers and industrial encoder inputs where voltage polarity reversal is possible.
What is the thermal resistance and derating behavior of SMBJ170CAHM3_A/H?
SMBJ170CAHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W. Its peak pulse power must be derated linearly above 25 °C ambient, per Figure 2 in the Vishay datasheet - for example, at 85 °C TA, usable PPPM drops to ~420 W. Proper copper pad sizing (0.2" × 0.2" per terminal) is essential to maintain these thermal values, and SMBJ170CAHM3_A/H supports reflow up to 260 °C (MSL Level 1).
Does SMBJ170CAHM3_A/H meet RoHS and halogen-free requirements?
Yes, SMBJ170CAHM3_A/H carries the HM3 suffix, indicating it is both RoHS-compliant and halogen-free per Vishay's material categorization standard (document 99912). This satisfies strict environmental regulations including EU RoHS Directive 2011/65/EU, China RoHS, and automotive ELV requirements. No brominated flame retardants or chlorine-based compounds are used in the molding compound or plating, and the device is rated UL 94 V-0 for flammability.
SMBJ170CAHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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)
SMBJ170CAHM3_A/H FAQ
1.How can I place an order for SMBJ170CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170CAHM3_A/H 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 SMBJ170CAHM3_A/H reliable?
The price and inventory of SMBJ170CAHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ170CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ170CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170CAHM3_A/H?
SMBJ170CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170CAHM3_A/H 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 SMBJ170CAHM3_A/H?
For technical support, including SMBJ170CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170CAHM3_A/H requirements.
6.How does Aetrix verify that SMBJ170CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ170CAHM3_A/H 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 SMBJ170CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ170CAHM3_A/H?
All SMBJ170CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170CAHM3_A/H, 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 SMBJ170CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMBJ170CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170CAHM3_A/H Tags
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