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Vishay General Semiconductor - Diodes Division SMBJ170AHM3_B/I
- Part No.:
- SMBJ170AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170AHM3_B/I.pdf
- Description:
- 600W,170V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,526
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Product details
Overview
SMBJ170AHM3_B/I 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 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 transients to ≤275 V at 2.2 A IPPM - deployed in industrial motor drives and telecom power supplies.
For engineers reviewing the SMBJ170AHM3_B/I datasheet, SMBJ170AHM3_B/I pinout, SMBJ170AHM3_B/I application, or SMBJ170AHM3_B/I equivalent, this page delivers verified electrical specs, thermal derating behavior, AEC-Q101 qualification status, halogen-free RoHS compliance, and real-world clamping performance under repetitive surge conditions.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, leveraging glass-passivated junction technology for stable breakdown and low incremental surge resistance. Its 100 °C/W junction-to-ambient thermal resistance (RθJA) and 20 °C/W junction-to-lead (RθJL) define PCB pad layout requirements for sustained 5.0 W power dissipation at TA = 50 °C.
The device responds within <1 ps to transient events and maintains clamping voltage ≤275 V up to its rated 2.2 A peak pulse current (IPPM), with temperature coefficient of VBR at +0.108 %/°C. It meets MSL Level 1 per J-STD-020 and supports reflow soldering up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 170 V - maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected line DC bias. |
| VBR (Breakdown Voltage) | 189–209 V at IT = 1 mA - guaranteed avalanche initiation range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | ≤275 V at IPPM = 2.2 A (10/1000 µs) - peak voltage seen by downstream circuitry during worst-case surge; defines protection margin. |
| PPPM (Peak Pulse Power) | 600 W - maximum non-repetitive surge energy absorption capability; validated per IEC 61000-4-5 waveform. |
| ID (Reverse Leakage) | ≤2.2 µA at VWM = 170 V - minimal standby power loss and signal integrity impact on high-impedance nodes. |
| TJ max. | +150 °C - maximum junction temperature rating; enables operation in industrial ambient environments up to +85 °C with proper derating. |
| Package | SMB (DO-214AA) - standardized 2-pin surface-mount outline with 5.0 mm × 3.9 mm footprint and 2.2 mm height; compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Low-side reference terminal | Connected to ground or lowest potential node; completes conduction path during reverse-biased transient clamp. |
| Cathode (banded end) | High-side transient input | Connected to protected line (e.g., 170 V rail); avalanche breakdown initiates here when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-event suppression of high-energy surges common in industrial motor switching and telecom line faults. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; suitable for under-hood and infotainment power rails. |
| Halogen-free & RoHS-compliant (HM3) | Meets IPC-1752A material declaration requirements and EU Directive 2011/65/EU; supports green manufacturing and export compliance. |
| MSL Level 1, 260 °C peak reflow | Eliminates pre-baking requirement; allows standard SMT assembly without moisture sensitivity handling constraints. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving protection fidelity for sensitive MOSFET gates and ADC inputs. |
Applications
| Industrial Motor Drive Protection | Telecom DC Power Input |
|---|---|
|
Use Scenario: Suppresses inductive kickback from 48 V–200 V DC motor controllers during MOSFET turn-off. IC Role / Device Role / Timing Role: Unidirectional TVS placed across DC bus to clamp flyback spikes before they reach gate drivers or MCU power pins. Use Value: Limits transient voltage to ≤275 V, preventing gate oxide rupture in 200 V-rated Si MOSFETs and ensuring >100,000-cycle reliability. |
Use Scenario: Protects primary-side DC/DC converter input in 48 V telecom rectifiers exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing 600 W pulses while maintaining <2.2 µA leakage at nominal 48 V–170 V system voltage. Use Value: Maintains system uptime by surviving repeated 10/1000 µs surges per IEC 61000-4-5 Level 4 without degradation. |
| Automotive Body Control Module (BCM) | Industrial PLC Analog Input Protection |
|
Use Scenario: Shields 12 V/24 V supply rails in BCMs from load dump and jump-start transients per ISO 7637-2. IC Role / Device Role / Timing Role: AEC-Q101-qualified unidirectional clamp mounted directly at connector entry point. Use Value: Withstands 35 V/100 ms load dump events by clamping to <275 V, preserving CAN transceivers and microcontroller LDOs. |
Use Scenario: Guards 4–20 mA current loop inputs in programmable logic controllers against field-wiring faults and ESD. IC Role / Device Role / Timing Role: Low-leakage (≤2.2 µA) TVS placed upstream of precision op-amp front-end to avoid offset drift. Use Value: Prevents latch-up in instrumentation amplifiers during 8 kV contact ESD events while adding <0.01 % gain error at full scale. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170AHE3_B/I | Same electrical specs, but RoHS-compliant commercial grade (E3) without halogen-free certification or AEC-Q101 qualification. | Lacks automotive qualification and halogen-free compliance; restricted to non-automotive industrial/commercial use. | Select when AEC-Q101 and halogen-free requirements are not mandated, and cost optimization is prioritized. |
| SMBJ170A-M3/5B | Identical SMB package and ratings, but supplied in 13" tape-and-reel (3200 pcs) with M3 halogen-free RoHS marking; no AEC-Q101 validation. | Not qualified for automotive; intended for high-volume consumer/industrial SMT production with halogen-free mandate. | Choose for large-batch manufacturing where AEC-Q101 is unnecessary but halogen-free compliance is required. |
Compared with SMBJ170AHM3_B/I, the HE3 variant omits automotive qualification and halogen-free verification, while the M3/5B version provides halogen-free compliance without AEC-Q101 - making SMBJ170AHM3_B/I the only option fully meeting automotive, environmental, and industrial surge standards simultaneously.
Availability
SMBJ170AHM3_B/I is available at Aetrix Electronics and suitable for industrial motor drives, telecom power inputs, automotive body control modules, and PLC analog input protection requiring stable component supply across extended product lifecycles.
Supply support for SMBJ170AHM3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting industrial automation, automotive electronics, and telecom infrastructure where robustness and long-term stability are critical.
FAQ
What is the clamping voltage of SMBJ170AHM3_B/I at its rated peak pulse current?
The SMBJ170AHM3_B/I clamps to a maximum of 275 V when subjected to its rated peak pulse current of 2.2 A under the standard 10/1000 µs waveform. This value is measured at the device terminals and defines the highest voltage downstream circuitry will experience during a surge event. The clamping performance is guaranteed across the full operating temperature range of -55 °C to +150 °C, and SMBJ170AHM3_B/I maintains this specification without degradation after repeated surges within its duty cycle limit of 0.01 %.
Is SMBJ170AHM3_B/I qualified for automotive applications?
Yes, SMBJ170AHM3_B/I is AEC-Q101 qualified, as confirmed by the HM3 suffix and documentation in Vishay's datasheet revision 09-Jan-2024. This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and mechanical shock - validating its suitability for under-hood and chassis-mounted automotive systems. SMBJ170AHM3_B/I is explicitly designated for automotive use, unlike non-HM3 variants such as SMBJ170A-E3/52 or SMBJ170A-M3/5B.
What does the "HM3" suffix indicate for SMBJ170AHM3_B/I?
The "HM3" suffix in SMBJ170AHM3_B/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this part from E3 (RoHS-compliant only), M3 (halogen-free RoHS only), and HE3 (RoHS + AEC-Q101 but not halogen-free) variants. SMBJ170AHM3_B/I meets IPC-1752A material declarations and JEDEC JESD201 Class 2 whisker resistance, making it compliant with stringent environmental and reliability mandates in automotive and industrial sectors.
Can SMBJ170AHM3_B/I be used in bidirectional protection circuits?
No, SMBJ170AHM3_B/I is a unidirectional TVS diode, as indicated by its "A" suffix and cathode band marking. Bidirectional operation requires the "CA" suffix (e.g., SMBJ170CA). Using SMBJ170AHM3_B/I in a bidirectional configuration would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit. For symmetric surge protection, select SMBJ170CAHM3_B/I or equivalent bidirectional variant.
What is the maximum printed circuit board copper pad size recommended for SMBJ170AHM3_B/I thermal management?
Vishay specifies a minimum mounting pad layout of 0.2" × 0.2" (5.0 mm × 5.0 mm) copper area per terminal for SMBJ170AHM3_B/I to achieve its rated 600 W peak pulse power and 5.0 W steady-state dissipation. Larger copper areas improve thermal spreading and reduce RθJA below the typical 100 °C/W, enabling higher sustained power handling. The device's RθJL of 20 °C/W further emphasizes the importance of direct thermal connection from leads to internal ground/power planes in multilayer PCBs.
SMBJ170AHM3_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:
- 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)
SMBJ170AHM3_B/I FAQ
1.How can I place an order for SMBJ170AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170AHM3_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 SMBJ170AHM3_B/I reliable?
The price and inventory of SMBJ170AHM3_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 SMBJ170AHM3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ170AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170AHM3_B/I?
SMBJ170AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170AHM3_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 SMBJ170AHM3_B/I?
For technical support, including SMBJ170AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170AHM3_B/I requirements.
6.How does Aetrix verify that SMBJ170AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ170AHM3_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 SMBJ170AHM3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ170AHM3_B/I?
All SMBJ170AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170AHM3_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 SMBJ170AHM3_B/I part is unused and in its original packaging.
Return procedure for SMBJ170AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170AHM3_B/I Tags
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