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Vishay General Semiconductor - Diodes Division SMBJ170CAHE3_B/I
- Part No.:
- SMBJ170CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170CAHE3_B/I.pdf
- Description:
- 600W,170V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,202
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Product details
Overview
SMBJ170CAHE3_B/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. 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), 2.2 A maximum reverse leakage at VWM, and clamps to ≤275 V at 2.2 A peak pulse current - used for protecting MOSFETs, sensor interfaces, and industrial I/O circuits.
For engineers reviewing the SMBJ170CAHE3_B/I datasheet, SMBJ170CAHE3_B/I pinout, SMBJ170CAHE3_B/I application, or SMBJ170CAHE3_B/I equivalent, this device is selected for robust ESD and surge protection in automotive-grade, industrial, and telecom systems where bidirectional clamping, AEC-Q101 qualification, and low-profile SMB packaging are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR min/max (189–209 V), VC ≤275 V at IPPM = 2.2 A, and thermal resistance RθJA = 100 °C/W. Its glass-passivated junction ensures stable clamping under repetitive surge conditions, and it meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
The device is AEC-Q101 qualified (denoted by HE3 suffix), RoHS-compliant, halogen-free optional, and rated for TJ = –55 to +150 °C operation. It delivers 600 W peak pulse power with 10/1000 µs waveform at 0.01% duty cycle, and exhibits <0.108 %/°C temperature coefficient of VBR.
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 IT = 1 mA - guaranteed breakdown range defining turn-on threshold |
| VC @ IPPM | ≤275 V at 2.2 A - clamped voltage during 10/1000 µs surge, limiting stress on downstream ICs |
| PPPM | 600 W - peak transient energy absorption capability under standardized surge waveform |
| ID @ VWM | ≤2.2 µA - ultra-low leakage ensuring minimal standby power loss and signal integrity |
| TJ max. | +150 °C - extended junction temperature rating enabling use in under-hood or high-ambient industrial environments |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical terminals with cathode/anode function interchangeable depending on applied voltage polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals serve as bidirectional clamping nodes; no fixed anode/cathode designation - conducts during overvoltage in either direction |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal/power lines without polarity concerns |
| AEC-Q101 qualification | Validated reliability for automotive electronics including engine control, body modules, and ADAS sensor interfaces |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) when properly mounted |
| Low-profile SMB package | Enables automated placement and high-density PCB layouts while maintaining thermal performance via 5.0 mm × 5.0 mm copper pads |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking - simplifies manufacturing logistics |
Applications
| Industrial Motor Drives | Automotive Sensor Interfaces |
|---|---|
|
Use Scenario: Protection of gate drivers and feedback sensing lines against switching-induced transients in variable-frequency drives. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed across DC bus or isolated signal paths to limit voltage excursions. Use Value: Prevents latch-up or destruction of SiC/GaN gate drivers and precision op-amps by clamping spikes to ≤275 V at 2.2 A. |
Use Scenario: Surge suppression on LIN/CAN physical layer inputs and analog sensor outputs (e.g., pressure, temperature) in engine compartments. IC Role / Device Role / Timing Role: Primary front-end transient suppressor for bidirectional communication and analog signal conditioning circuits. Use Value: Maintains signal fidelity under ISO 7637-2 Pulse 1/2/5a while meeting AEC-Q101 requirements for automotive deployment. |
| Telecom Power Feeds | Consumer Appliance Control Boards |
|
Use Scenario: Input-stage protection of PoE-powered equipment and DSL line cards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: First-line defense against common-mode transients entering via Ethernet or AC/DC adapter inputs. Use Value: Absorbs up to 600 W of transient energy without degradation, preserving downstream DC-DC converters and PHY ICs. |
Use Scenario: Overvoltage safeguarding of microcontroller I/O pins and relay coil flyback paths in washing machines, HVAC controllers, and smart home hubs. IC Role / Device Role / Timing Role: Low-leakage (≤2.2 µA) clamping device placed directly at connector or switch node. Use Value: Eliminates need for external series resistors or RC filters while ensuring long-term reliability under repeated surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170CAHM3_B/I | Halogen-free variant with identical electrical specs and AEC-Q101 qualification | No functional difference; selected where halogen-free compliance is mandated by OEM or regional regulations | Choose when RoHS + halogen-free certification is required without compromising surge performance |
| SMAJ170CAHE3_A/H | Lower PPPM (400 W), larger VBR tolerance (±10%), SMA package (smaller thermal mass) | Reduced surge handling margin; less suitable for IEC 61000-4-5 Level 4 or high-repetition industrial environments | Select only for cost-sensitive, lower-energy applications where board space is constrained and 400 W suffices |
Compared with SMBJ170CAHE3_B/I, the HM3 variant offers identical protection performance with halogen-free materials, while the SMAJ170CAHE3_A/H trades 33% lower peak power and reduced thermal robustness for smaller footprint - making SMBJ170CAHE3_B/I optimal for demanding automotive and industrial surge immunity.
Availability
SMBJ170CAHE3_B/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive sensor interfaces, and telecom power feeds requiring stable component supply, AEC-Q101 qualification, and consistent 600 W surge capability.
Supply support for SMBJ170CAHE3_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, efficiency, and application-specific validation.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems needing certified, repeatable clamping performance in compact surface-mount packages.
FAQ
What is the clamping voltage of SMBJ170CAHE3_B/I at its rated peak pulse current?
The SMBJ170CAHE3_B/I clamps to a maximum of 275 V when subjected to its specified peak pulse current of 2.2 A under the 10/1000 µs waveform. This value is measured per JEDEC standards and guarantees protection margin for downstream components rated up to 300 V, such as industrial gate drivers and telecom interface ICs. The SMBJ170CAHE3_B/I maintains this clamping performance across its full operating temperature range.
Is SMBJ170CAHE3_B/I suitable for automotive applications?
Yes, SMBJ170CAHE3_B/I is AEC-Q101 qualified, explicitly validated for automotive use in engine control units, body electronics, and ADAS sensor modules. Its construction includes glass-passivated junctions, MSL Level 1 moisture resistance, and operation from –55 °C to +150 °C - all confirmed per AEC-Q101 test protocols. The HE3 suffix denotes this qualification, making SMBJ170CAHE3_B/I appropriate for under-hood and chassis-mounted deployments.
How does the bidirectional design of SMBJ170CAHE3_B/I affect circuit layout?
The SMBJ170CAHE3_B/I has no polarity marking and functions identically in both directions, allowing direct placement across AC-coupled lines, differential buses (e.g., RS-485), or floating power rails without orientation constraints. Unlike unidirectional TVS diodes, it eliminates risk of incorrect installation and simplifies layout - especially in space-constrained designs where trace routing symmetry matters. Its symmetrical terminals mean either end connects to the protected node or ground/reference plane.
What is the maximum reverse leakage current for SMBJ170CAHE3_B/I at 170 V?
At its 170 V stand-off voltage (VWM), the SMBJ170CAHE3_B/I exhibits a maximum reverse leakage current (ID) of 2.2 µA at 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor paths and minimizes power loss in always-on systems. Leakage remains below 10 µA even at +125 °C, ensuring stable performance across industrial temperature ranges without degrading adjacent analog or digital circuitry.
Does SMBJ170CAHE3_B/I require heatsinking for 600 W surge handling?
No additional heatsink is required for single-event 600 W surge handling, as the SMBJ170CAHE3_B/I is rated for that power level under the standardized 10/1000 µs waveform with 0.01% duty cycle. However, proper PCB layout - specifically 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - is mandatory to achieve the specified thermal resistance (RθJA = 100 °C/W) and prevent localized overheating. Repeated surges demand derating per Fig. 2 in the datasheet.
SMBJ170CAHE3_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)
SMBJ170CAHE3_B/I FAQ
1.How can I place an order for SMBJ170CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170CAHE3_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 SMBJ170CAHE3_B/I reliable?
The price and inventory of SMBJ170CAHE3_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 SMBJ170CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ170CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170CAHE3_B/I?
SMBJ170CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170CAHE3_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 SMBJ170CAHE3_B/I?
For technical support, including SMBJ170CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170CAHE3_B/I requirements.
6.How does Aetrix verify that SMBJ170CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ170CAHE3_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 SMBJ170CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ170CAHE3_B/I?
All SMBJ170CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170CAHE3_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 SMBJ170CAHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ170CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170CAHE3_B/I Tags
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