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Vishay General Semiconductor - Diodes Division SMBJ170CAHM3_B/I
- Part No.:
- SMBJ170CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170CAHM3_B/I.pdf
- Description:
- 600W,170V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,122
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Product details
Overview
SMBJ170CAHM3_B/I 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 stand-off 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 across –55 °C to +150 °C junction temperature range - deployed in industrial motor drives, telecom line interfaces, and automotive sensor signal lines.
For engineers reviewing the SMBJ170CAHM3_B/I datasheet, SMBJ170CAHM3_B/I pinout, SMBJ170CAHM3_B/I application, or SMBJ170CAHM3_B/I equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal derating curves, AEC-Q101 qualification status, and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker testing - all critical for ESD/surge protection design validation and automotive-grade BOM selection.
Technical Context
This TVS diode employs a glass-passivated silicon junction optimized for fast response (<1 ps) to transient events such as inductive switching spikes and lightning-induced surges. Its bidirectional architecture enables symmetrical clamping in both polarities without external polarity management, eliminating need for series diodes or bridge configurations in AC-coupled or differential signal paths.
The device sustains repetitive 600 W pulses (10/1000 µs waveform, 0.01% duty cycle) with low incremental surge resistance and meets UL 497B recognition (QVGQ2) for telecom protectors. Thermal resistance is 100 °C/W (junction-to-ambient, on 5.0 mm × 5.0 mm copper pads) and 20 °C/W (junction-to-lead), supporting reliable operation under sustained surge stress in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 170 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 189–209 V at 1 mA - Guaranteed conduction onset range; ensures predictable turn-on during transients above system rail. |
| 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 under standardized surge waveform; validates compliance with IEC 61000-4-5 Level 4. |
| ID (Max Reverse Leakage) | 1.0 µA at VWM - Ultra-low standby current minimizes power loss and avoids false triggering in high-impedance circuits. |
| TJ max. | +150 °C - Enables deployment in under-hood automotive, industrial power supplies, and enclosed enclosures without thermal derating penalties. |
| Package | SMB (DO-214AA) - Low-profile (2.20 mm height), surface-mount package compatible with automated pick-and-place and reflow soldering (MSL Level 1, 260 °C peak). |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, polarity-unmarked for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal 1 (cathode band side not applicable) | One side of symmetrical PN junction; functions identically as cathode under reverse bias due to bidirectional structure. |
| Cathode | Terminal 2 (cathode band side not applicable) | Other side of symmetrical PN junction; no polarity marking required; both terminals behave identically during transient clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), and ungrounded systems without polarity constraints. |
| 600 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 surge immunity requirements for industrial and telecom infrastructure equipment. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including body control modules, ADAS sensor interfaces, and infotainment power rails. |
| Halogen-free & RoHS-compliant | Fulfills environmental compliance mandates (JEDEC J-STD-609A Class 2a) and supports lead-free reflow profiles up to 260 °C. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., EFT bursts), improving protection margin for downstream ICs. |
Applications
| Industrial Motor Drives | Telecom Line Interfaces |
|---|---|
|
Use Scenario: Protection of gate drivers and feedback sensing circuits against inductive kickback from IGBT/MOSFET switching in variable-frequency drives. IC Role / Device Role / Timing Role: Bidirectional TVS placed across DC bus or signal inputs to clamp voltage spikes exceeding 170 V. Use Value: Prevents latch-up or permanent damage to isolated amplifiers and PWM controllers by limiting transient voltage to ≤275 V. |
Use Scenario: Surge suppression on T1/E1, xDSL, or POTS line cards exposed to lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Primary protection element bridging tip/ring lines to ground, leveraging symmetrical clamping for AC-coupled signals. Use Value: Maintains signal integrity during 6 kV/0.5 J surges while adding <1 pF junction capacitance - negligible impact on 2.048 MHz data rates. |
| Automotive Sensor Signal Lines | Power Supply Input Rails |
|
Use Scenario: Shielding analog outputs of pressure, temperature, or position sensors connected to ECUs in engine compartments. IC Role / Device Role / Timing Role: Bidirectional clamp between sensor output and ground, rated for 150 °C ambient and AEC-Q101 stress conditions. Use Value: Survives repeated load-dump and ISO 7637-2 Pulse 5a transients while maintaining <1 µA leakage at 170 V - preserving sensor accuracy. |
Use Scenario: Secondary overvoltage protection on 24 V or 48 V DC input rails feeding industrial PLCs or PoE-powered devices. IC Role / Device Role / Timing Role: Fast-acting shunt device triggered only during abnormal overvoltage events, complementing upstream fuses and MOVs. Use Value: Limits fault voltage to 275 V within nanoseconds, preventing catastrophic failure of downstream DC-DC converters and microcontrollers. |
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_B/I | Same electrical specs, but RoHS-compliant commercial grade (non-AEC-Q101); uses standard tin plating without halogen-free compound. | Approved for industrial/commercial use only; not validated for automotive temperature cycling or humidity testing. | Select when AEC-Q101 qualification is unnecessary and cost sensitivity favors non-halogen-free variant. |
| SMAJ170CAHM3 | Lower 400 W PPPM rating; SMA package (smaller footprint, higher RθJA = 140 °C/W); identical VWM/VBR/VC specs. | Limited to lower-energy surge environments (IEC 61000-4-5 Level 2); unsuitable for high-reliability automotive or telecom deployments. | Choose only for space-constrained consumer designs where 600 W surge margin is not required. |
Compared with SMBJ170CAHM3_B/I, the HE3 variant lacks automotive qualification and halogen-free certification, while the SMAJ170CAHM3 sacrifices 33% pulse power headroom and thermal performance - making SMBJ170CAHM3_B/I the sole choice for AEC-Q101-compliant, high-energy industrial surge protection.
Availability
SMBJ170CAHM3_B/I is available at Aetrix Electronics and suitable for industrial motor drives, telecom line interfaces, automotive sensor signal lines, and power supply input rails requiring stable component supply, long-term lifecycle support, and traceable halogen-free sourcing.
Supply support for SMBJ170CAHM3_B/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, power efficiency, and automotive-grade qualification.
The SMBJ series targets high-energy transient suppression in harsh environments, engineered specifically for industrial automation, telecom infrastructure, and automotive electronics where robustness and regulatory compliance are mandatory.
FAQ
What is the clamping voltage of SMBJ170CAHM3_B/I at its rated peak pulse current?
The SMBJ170CAHM3_B/I has a maximum clamping voltage (VC) of 275 V at its peak pulse current (IPPM) of 2.2 A under the 10/1000 µs waveform condition. This value is measured per ANSI/IEEE C62.35 standards and defines the upper voltage limit imposed on protected circuitry during a standardized surge event. The SMBJ170CAHM3_B/I maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C), ensuring consistent protection in demanding thermal environments.
Is SMBJ170CAHM3_B/I qualified for automotive applications?
Yes, SMBJ170CAHM3_B/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" (halogen-free, RoHS-compliant, and AEC-Q101 qualified). It undergoes rigorous stress testing including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing - validating its suitability for under-hood and chassis-mounted automotive systems such as ADAS sensor interfaces and body control modules.
How does the bidirectional design of SMBJ170CAHM3_B/I affect its placement on the PCB?
The SMBJ170CAHM3_B/I has no polarity marking and is symmetrically constructed, so orientation on the PCB is irrelevant - either terminal may connect to the line or ground. This eliminates assembly errors and simplifies layout for AC-coupled or floating signal paths like RS-485, CAN FD, or Ethernet PHY interfaces. Unlike unidirectional TVS diodes, the SMBJ170CAHM3_B/I requires no cathode-band alignment during automated placement.
What is the thermal resistance of SMBJ170CAHM3_B/I, and how does it impact board layout?
SMBJ170CAHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal, and 20 °C/W junction-to-lead (RθJL). To maintain reliability under repetitive surges, designers must provide minimum pad area per datasheet recommendations; reducing pad size increases RθJA and risks thermal runaway during sustained transient activity. The SMBJ170CAHM3_B/I's low RθJL supports effective heat transfer to adjacent copper pours or thermal vias.
Does SMBJ170CAHM3_B/I meet UL recognition requirements for telecom protectors?
Yes, SMBJ170CAHM3_B/I carries Underwriters Laboratories recognition under UL 497B (QVGQ2 file E136766) for both unidirectional and bidirectional transient protectors. This certification confirms compliance with safety standards for telecom network interface devices, including insulation coordination, flammability (UL 94 V-0), and surge withstand capability - enabling direct use in certified telecommunications equipment without additional system-level validation.
SMBJ170CAHM3_B/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:
- -
- 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_B/I FAQ
1.How can I place an order for SMBJ170CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170CAHM3_B/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 SMBJ170CAHM3_B/I reliable?
The price and inventory of SMBJ170CAHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ170CAHM3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ170CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170CAHM3_B/I?
SMBJ170CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170CAHM3_B/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 SMBJ170CAHM3_B/I?
For technical support, including SMBJ170CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170CAHM3_B/I requirements.
6.How does Aetrix verify that SMBJ170CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ170CAHM3_B/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 SMBJ170CAHM3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ170CAHM3_B/I?
All SMBJ170CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170CAHM3_B/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 SMBJ170CAHM3_B/I part is unused and in its original packaging.
Return procedure for SMBJ170CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170CAHM3_B/I Tags
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