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Vishay General Semiconductor - Diodes Division SMBJ170AHE3_B/H
- Part No.:
- SMBJ170AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170AHE3_B/H.pdf
- Description:
- 600W,170V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,333
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Product details
Overview
SMBJ170AHE3_B/H 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 voltage (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, telecom power supplies, and automotive ECUs.
For engineers reviewing the SMBJ170AHE3_B/H datasheet, SMBJ170AHE3_B/H pinout, SMBJ170AHE3_B/H application, or SMBJ170AHE3_B/H equivalent, this device serves as a high-voltage, AEC-Q101 qualified transient suppressor for DC bus protection where fast response (<1 ps), low clamping ratio (VC/VBR ≈ 1.45), and stable thermal performance up to +150 °C junction temperature are required.
Technical Context
This unidirectional TVS operates by avalanche breakdown under transient overvoltage conditions, diverting surge current away from protected circuitry while maintaining low dynamic impedance. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and repeatable clamping behavior across temperature (-55 °C to +150 °C).
The device complies with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive transients), and its 100 °C/W junction-to-ambient thermal resistance enables reliable operation on standard PCB copper pads without heatsinking in moderate-duty cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 170 V - Maximum continuous reverse operating voltage before conduction begins; defines upper limit of normal DC rail operation. |
| VBR (Breakdown Voltage) | 189–209 V at 1 mA - Confirmed avalanche onset range; ensures predictable triggering above nominal system voltage. |
| VC (Clamping Voltage) | 275 V at 2.2 A (10/1000 µs) - Peak voltage seen by protected load during worst-case surge; limits stress on downstream MOSFETs or ICs. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy-handling capability for standardized 10/1000 µs surge; supports IEC 61000-4-5 Level 3 compliance. |
| IPPM (Peak Pulse Current) | 2.2 A - Maximum non-repetitive surge current the device safely clamps; derived directly from VC and PPPM. |
| TJmax | +150 °C - Maximum junction temperature; enables use in under-hood automotive and high-ambient industrial environments. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic case with matte tin-plated leads; meets UL 94 V-0 flammability rating and J-STD-002 solderability requirements. Polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction (e.g., ESD discharge path) | Connected to protected line; forms low-impedance shunt path to ground when VBR exceeded. |
| Cathode | Current exit terminal; marked with band | Typically tied to system ground or lower-potential reference; defines unidirectional conduction direction. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against severe transients like load dump (ISO 7637-2 Pulse 5a) without derating in compact SMB footprint. |
| AEC-Q101 qualification (HE3 suffix) | Validates long-term reliability for automotive applications including engine control modules and body electronics. |
| Glass passivated junction | Ensures stable VBR tolerance (±5%), low leakage (<1 µA), and immunity to humidity-induced parameter drift. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot during clamping, reducing stress on 200 V-rated MOSFETs and gate drivers. |
| MSL Level 1 (260 °C reflow) | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
Applications
| Industrial Motor Drives | Automotive Engine Control Units |
|---|---|
|
Use Scenario: Protection of 24 V DC bus against inductive kickback from solenoid valves and relay coils. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp transients up to ±100 V. Use Value: Limits bus voltage excursion to ≤275 V during 2.2 A surges, preventing latch-up or destruction of 32 V-rated gate drivers. |
Use Scenario: Safeguarding CAN transceiver supply pins against battery line transients during cold-crank or jump-start events. IC Role / Device Role / Timing Role: Standoff-rated TVS on VCC input of isolated CAN interface ICs. Use Value: Maintains <1 µA leakage at 170 V standby, ensuring minimal quiescent current drain while clamping ISO 7637-2 Pulse 1 to safe levels. |
| Telecom Power Supplies | Renewable Energy Inverters |
|
Use Scenario: Input-stage surge suppression for 48 V PoE-powered equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on DC input before DC-DC converter stage. Use Value: Withstands 600 W pulses without degradation, enabling compliance with IEC 61000-4-5 (1 kV/2 Ω) test requirements. |
Use Scenario: DC-link overvoltage protection in solar string inverters with 600–1000 V nominal bus voltage. IC Role / Device Role / Timing Role: Cascaded TVS in series with higher-voltage devices to manage localized transients near IGBT gate drivers. Use Value: Provides precise 170 V threshold for staged clamping architecture, improving system-level energy absorption efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170AHM3_B/H | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU automotive Tier 1 programs). | Direct substitution if halogen-free content is required; same thermal and electrical performance. |
| SMCJ170AHE3_A/H | Same VWM/VBR/VC, but in larger SMC (DO-214AB) package with 1500 W PPPM rating and 3.3 A IPPM. | Higher energy handling for systems requiring extended surge duration or repeated transient exposure. | Choose when board space allows and >600 W pulse power margin is needed; not pin-compatible due to larger footprint. |
Compared with SMBJ170AHE3_B/H, the HM3 variant offers identical protection performance with halogen-free construction, while the SMCJ170AHE3_A/H delivers 2.5× higher pulse power in a physically incompatible package - making the former a drop-in material alternative and the latter a higher-capacity upgrade requiring layout change.
Availability
SMBJ170AHE3_B/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive engine control units, and telecom power supplies requiring stable component supply, AEC-Q101 validation, and consistent 170 V standoff performance.
Supply support for SMBJ170AHE3_B/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, TVS, MOSFETs, and optoelectronics with emphasis on reliability, precision, and automotive-grade qualification.
The SMBJ series is engineered for high-voltage transient suppression in space-constrained applications, balancing 600 W surge capability with SMB footprint - targeting automotive, industrial, and telecom systems needing certified, repeatable clamping behavior.
FAQ
What is the maximum clamping voltage of SMBJ170AHE3_B/H under standard test conditions?
The SMBJ170AHE3_B/H has a maximum clamping voltage (VC) of 275 V when subjected to a 10/1000 µs waveform at 2.2 A peak pulse current. This value is measured per IEC 61000-4-5 and defines the upper voltage limit imposed on protected circuitry during surge events. The clamping performance remains stable across -55 °C to +150 °C operating temperature range, and SMBJ170AHE3_B/H maintains this spec without derating up to TA = 25 °C.
Is SMBJ170AHE3_B/H suitable for automotive applications?
Yes, SMBJ170AHE3_B/H is AEC-Q101 qualified, confirming its suitability for automotive applications including engine control units, body control modules, and infotainment power supplies. The HE3 suffix explicitly denotes AEC-Q101 qualification, and the device passes temperature cycling, highly accelerated life testing (HALT), and ESD robustness tests per the standard. SMBJ170AHE3_B/H is rated for operation from -55 °C to +150 °C, supporting under-hood and cabin environments.
What does the "HE3" suffix indicate in SMBJ170AHE3_B/H?
The "HE3" suffix in SMBJ170AHE3_B/H indicates RoHS-compliant construction with AEC-Q101 qualification. "H" denotes AEC-Q101 qualification, "E3" specifies RoHS-compliant (lead-free) matte tin plating and packaging. The "_B/H" portion refers to tape-and-reel packaging: "B" is the revision code, and "H" denotes 7-inch reel with 750-unit quantity. SMBJ170AHE3_B/H is not halogen-free; that variant uses the HM3 suffix.
How does SMBJ170AHE3_B/H compare to bidirectional TVS diodes like SMBJ170CA?
SMBJ170AHE3_B/H is unidirectional and intended for DC line protection where polarity is fixed, offering lower leakage (<1.0 µA at VWM) and higher surge current capability in one direction. In contrast, SMBJ170CA is bidirectional, symmetrically rated for AC or floating-line applications but exhibits doubled leakage (≤2.0 µA) for VWM ≤10 V - irrelevant here, as SMBJ170CA's VWM is 170 V. SMBJ170AHE3_B/H cannot replace SMBJ170CA in AC-coupled circuits without redesigning biasing and grounding.
What is the thermal resistance of SMBJ170AHE3_B/H, and how does it affect PCB layout?
SMBJ170AHE3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout per Vishay spec; increasing copper area reduces RθJA and improves surge duty cycle capability. For continuous 5.0 W power dissipation, ambient temperature must stay below 100 °C - but SMBJ170AHE3_B/H is rated for transient, not steady-state, power, so thermal design focuses on short-pulse energy absorption rather than DC thermal management.
SMBJ170AHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- 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:
- 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)
SMBJ170AHE3_B/H FAQ
1.How can I place an order for SMBJ170AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170AHE3_B/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 SMBJ170AHE3_B/H reliable?
The price and inventory of SMBJ170AHE3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ170AHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ170AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170AHE3_B/H?
SMBJ170AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170AHE3_B/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 SMBJ170AHE3_B/H?
For technical support, including SMBJ170AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170AHE3_B/H requirements.
6.How does Aetrix verify that SMBJ170AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ170AHE3_B/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 SMBJ170AHE3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ170AHE3_B/H?
All SMBJ170AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170AHE3_B/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 SMBJ170AHE3_B/H part is unused and in its original packaging.
Return procedure for SMBJ170AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170AHE3_B/H Tags
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