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Vishay General Semiconductor - Diodes Division SMBJ3V3HM3_B/I
- Part No.:
- SMBJ3V3HM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ3V3HM3_B/I.pdf
- Description:
- 600W,3.3V UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,910
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Product details
Overview
SMBJ3V3HM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 3.3 V stand-off voltage (VWM), 600 W peak pulse power rating (10/1000 µs), clamping voltage of 7.5 V at 38.7 A peak pulse current, and operates across –55 °C to +150 °C junction temperature range - deployed on power rails and signal lines in industrial sensor interfaces.
For engineers reviewing the SMBJ3V3HM3_B/I datasheet, SMBJ3V3HM3_B/I pinout, SMBJ3V3HM3_B/I application, or SMBJ3V3HM3_B/I equivalent, this page delivers verified electrical specs, thermal derating behavior, AEC-Q101 qualification status, MSL Level 1 reflow compatibility, and halogen-free RoHS-compliant sourcing details - all specific to the HM3_B/I variant with 13" tape-and-reel packaging.
Technical Context
This TVS diode uses a glass-passivated silicon junction optimized for fast response (<1 ps) to ESD and lightning-induced transients. Its unidirectional polarity enables integration into DC-biased circuits where reverse conduction must be blocked until clamping threshold is exceeded.
The device meets JESD201 Class 2 whisker resistance and is rated for 100 A non-repetitive forward surge (8.3 ms half-sine), with thermal resistance RθJA = 100 °C/W on standard 0.2" × 0.2" copper pads - enabling reliable operation under repetitive surge conditions when properly heatsinked.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 3.3 V - maximum continuous reverse operating voltage before clamping begins; sets minimum system supply margin for safe operation |
| VBR (min) | 3.67 V at 1 mA - guaranteed breakdown initiation point; ensures predictable turn-on during overvoltage events |
| VC @ IPPM | 7.5 V at 38.7 A - clamped voltage during 600 W transient; defines worst-case stress on downstream ICs |
| PPPM | 600 W (10/1000 µs waveform) - peak surge energy handling capacity; supports IEC 61000-4-5 Level 4 compliance |
| IFSM | 100 A (8.3 ms half-sine) - single-event surge current limit; validates robustness against inductive switch-off spikes |
| TJ max | +150 °C - maximum junction temperature; enables use in high-ambient environments like motor drives and automotive ECUs |
| MSL Level | Level 1 (J-STD-020) - no floor life limitation; supports standard SMT reflow without dry-pack requirements |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Cathode indicated by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to lower-potential side (e.g., GND or return path); blocks reverse current until VBR exceeded |
| Cathode | Current exit terminal in forward bias; marked end | Connected to protected line (e.g., 3.3 V rail or signal input); conducts surge current to ground during clamping |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Handles IEC 61000-4-5 surge waveforms up to Level 4 without degradation - critical for industrial fieldbus and PoE-powered devices |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for body control modules and ADAS sensors |
| Halogen-free & RoHS-compliant (HM3) | Meets IPC-1752A material declaration requirements and EU Directive 2011/65/EU - supports green manufacturing and export compliance |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns rise time), reducing risk of latch-up in CMOS ICs |
| Fast response time | Sub-nanosecond junction response ensures clamping activation before transient energy couples into protected circuitry |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting 3.3 V analog front-end inputs of pressure/temperature sensors exposed to relay coil flyback and ESD in factory automation systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output and MCU ADC input to clamp transients while preserving signal integrity. Use Value: Clamps 600 W surges to ≤7.5 V, preventing ADC saturation and protecting internal ESD structures of precision op-amps. |
Use Scenario: Safeguarding LIN bus transceiver power pins against load dump and jump-start transients in door module ECUs. IC Role / Device Role / Timing Role: Standoff-rated TVS on 3.3 V regulator output supplying LIN PHY, blocking reverse leakage below 3.3 V. Use Value: Withstands 100 A 8.3 ms surges and operates up to +150 °C - meets ISO 7637-2 Pulse 5a requirements without derating. |
| USB-C Power Delivery Port | Smart Meter Communication Interface |
Use Scenario: Overvoltage protection on VCONN and CC lines in USB-C receptacles subject to hot-plug ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS with 3.3 V VWM placed directly at connector to minimize trace inductance. Use Value: Sub-1 ns response and 7.5 V clamping prevent false toggling of CC logic and damage to USB PD controllers. |
Use Scenario: Protecting RS-485 transceiver VCC pins in utility smart meters installed in outdoor substations with high lightning exposure. IC Role / Device Role / Timing Role: Primary TVS on 3.3 V supply rail feeding isolated RS-485 PHY, coordinated with secondary GDT-based protection. Use Value: 600 W rating and 150 °C TJ max ensure sustained operation in sealed enclosures with minimal airflow and ambient up to +85 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ3V3A-E3/52 | Commercial-grade (non-AEC-Q101), RoHS-compliant but not halogen-free; same VWM, VBR, and PPPM | Lacks automotive qualification and whisker resistance certification; suitable for consumer or industrial non-automotive designs | Select when AEC-Q101 and halogen-free compliance are not required; lower cost and broader distributor availability |
| SAC3V3 | Same VWM and VC, but lower PPPM (300 W), smaller SOD-323 package, higher RθJA (250 °C/W) | Not suitable for high-energy surges or high-ambient thermal environments; limited to low-power portable electronics | Choose only for space-constrained PCBs where 300 W surge immunity suffices and thermal management is tightly controlled |
Compared with SMBJ3V3A-E3/52, SMBJ3V3HM3_B/I adds AEC-Q101 qualification and halogen-free construction for automotive use; compared with SAC3V3, it delivers double the surge power handling and superior thermal performance in SMB package - making it the only option meeting both industrial surge and automotive reliability requirements.
Availability
SMBJ3V3HM3_B/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, USB-C power delivery ports, and smart meter communication interfaces requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ3V3HM3_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, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting industrial automation, automotive electronics, and telecom infrastructure where robustness against ESD, lightning, and inductive switching is mission-critical.
FAQ
What is the clamping voltage of SMBJ3V3HM3_B/I at its rated peak pulse current?
The SMBJ3V3HM3_B/I has a maximum clamping voltage (VC) of 7.5 V at 38.7 A peak pulse current (IPPM), measured under the standardized 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during a 600 W transient event and is confirmed in Vishay's Document Number 88392, Table on page 2. The SMBJ3V3HM3_B/I maintains this clamping performance across its full operating temperature range.
Is SMBJ3V3HM3_B/I qualified for automotive applications?
Yes, SMBJ3V3HM3_B/I is AEC-Q101 qualified, as indicated by the "HM3" suffix (halogen-free, RoHS-compliant, and AEC-Q101 qualified). It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 Rev D. This makes SMBJ3V3HM3_B/I suitable for automotive body electronics, infotainment power rails, and ADAS sensor protection - unlike commercial variants such as SMBJ3V3A-E3/52.
What does the "_B/I" suffix mean in SMBJ3V3HM3_B/I?
The "_B/I" suffix in SMBJ3V3HM3_B/I denotes packaging configuration: "B" indicates the base ordering code revision (e.g., revision B of the HM3 specification), and "I" specifies 13-inch diameter plastic tape-and-reel packaging with 3200 units per reel. This matches Vishay's Ordering Information table on page 3 of Document 88392 and ensures compatibility with high-volume SMT assembly lines using standard 13" feeders.
Can SMBJ3V3HM3_B/I be used in bidirectional signal line protection?
No, SMBJ3V3HM3_B/I is a unidirectional TVS diode - its cathode band marking and electrical characteristics (e.g., forward voltage drop, no symmetrical VBR) confirm it is intended only for DC-biased or polarity-defined applications. For bidirectional protection (e.g., AC lines or differential buses), Vishay specifies CA-suffix parts like SMBJ3V3CA; using SMBJ3V3HM3_B/I on bidirectional signals would result in unintended forward conduction and failure.
What is the thermal resistance and recommended pad layout for SMBJ3V3HM3_B/I?
SMBJ3V3HM3_B/I 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, as defined in Vishay's thermal characteristics table (page 3, Document 88392). Deviation from this pad size increases RθJA, reducing surge current capability - especially critical for repetitive surge scenarios or high-ambient-temperature deployments.
SMBJ3V3HM3_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):
- 3.3V
- Voltage - Breakdown (Min):
- 4.1V
- Voltage - Clamping (Max) @ Ipp:
- 7.3V
- Current - Peak Pulse (10/1000µs):
- 50A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 5200pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ3V3HM3_B/I FAQ
1.How can I place an order for SMBJ3V3HM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ3V3HM3_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 SMBJ3V3HM3_B/I reliable?
The price and inventory of SMBJ3V3HM3_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 SMBJ3V3HM3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ3V3HM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ3V3HM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ3V3HM3_B/I?
SMBJ3V3HM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ3V3HM3_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 SMBJ3V3HM3_B/I?
For technical support, including SMBJ3V3HM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ3V3HM3_B/I requirements.
6.How does Aetrix verify that SMBJ3V3HM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ3V3HM3_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 SMBJ3V3HM3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ3V3HM3_B/I?
All SMBJ3V3HM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ3V3HM3_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 SMBJ3V3HM3_B/I part is unused and in its original packaging.
Return procedure for SMBJ3V3HM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ3V3HM3_B/I Tags
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