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Vishay General Semiconductor - Diodes Division SMBJ3V3HM3/I
- Part No.:
- SMBJ3V3HM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ3V3HM3/I.pdf
- Description:
- TVS DIODE 3.3VWM 7.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBJ3V3HM3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection of 3.3 V logic circuits. It features a 3.3 V stand-off voltage (VWM), 4.1 V minimum breakdown voltage (VBR), 7.3 V clamping voltage at 50 A (10/1000 μs), 600 W peak pulse power, and SMB (DO-214AA) package - deployed to safeguard ICs, MOSFETs, and sensor signal lines against inductive switching transients and ESD.
For engineers reviewing the SMBJ3V3HM3/I datasheet, SMBJ3V3HM3/I pinout, SMBJ3V3HM3/I application, or SMBJ3V3HM3/I equivalent, key selection criteria include clamping performance at 50 A, junction temperature rating up to 175 °C, halogen-free RoHS compliance, AEC-Q101 qualification status, and thermal resistance (RθJA = 100 °C/W) under standard PCB mounting conditions.
Technical Context
This TVS diode operates exclusively in unidirectional mode with cathode-band polarity marking and is optimized for fast transient suppression on low-voltage DC rails. Its 10/1000 μs waveform response delivers 50 A peak pulse current (IPP) and 7.3 V clamping, while the 8/20 μs rating supports 200 A surge (IPPM) with 10.3 V clamping - critical for automotive and industrial I/O line protection.
The device uses silicon avalanche junction technology with a typical junction capacitance of 5200 pF at 0 V and 1 MHz, and exhibits a negative temperature coefficient of VBR (−5.3 × 10⁻⁴ /°C), ensuring stable breakdown behavior across −65 °C to +175 °C operating range. Thermal design relies on 0.2" × 0.2" copper pads per terminal for specified RθJL = 20 °C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 3.3 V - maximum continuous reverse working voltage before conduction begins; matches 3.3 V supply rail systems. |
| VBR (min) | 4.1 V - guaranteed avalanche breakdown starts no lower than this; ensures reliable margin above VWM. |
| VC @ IPP | 7.3 V at 50 A (10/1000 μs) - clamped voltage seen by protected circuit during common surge events. |
| PPPM | 600 W - peak pulse power handling capability under standardized 10/1000 μs waveform. |
| TJ max | +175 °C - maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments. |
| CJ | 5200 pF at 0 V, 1 MHz - junction capacitance impacts high-speed signal integrity; relevant for data line protection. |
| RθJA | 100 °C/W - thermal resistance from junction to ambient on recommended PCB layout; informs derating at elevated ambient temps. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, MSL Level 1 compliant (reflow peak 260 °C), UL 94 V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when voltage exceeds VBR. |
| Anode | Reference/return path | Typically tied to system ground; completes current path during clamping event. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for modern electronics manufacturing and end-of-life disposal. |
| 600 W peak pulse power | Supports robust protection against ISO 7637-2 pulse 1/2a/5a and IEC 61000-4-5 surge events in industrial control systems. |
| Fast response time | Sub-nanosecond avalanche turn-on enables effective suppression of ESD (IEC 61000-4-2) and fast transients. |
| Low clamping ratio (VC/VBR ≈ 1.78) | Minimizes overvoltage stress on downstream 3.3 V components during surge events. |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting analog and digital signal lines (e.g., I²C, CAN stubs, ADC inputs) in factory automation sensors exposed to relay coil kickback and motor drive noise. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between signal line and ground to limit transient overvoltage before it reaches MCU or signal conditioner IC. Use Value: Prevents latch-up or permanent damage to 3.3 V interface ICs during repetitive 50–100 A inductive surges with <7.3 V clamping. | Use Scenario: Safeguarding LIN bus transceivers and microcontroller GPIOs in door modules, seat controllers, and lighting ECUs subjected to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 3.3 V auxiliary supply rail and low-speed communication lines. Use Value: Ensures functional safety compliance (ISO 26262 ASIL-B support via AEC-Q101 qualification) and withstands 200 A (8/20 μs) surges per ISO 16750-2. |
| Medical Diagnostic Equipment | Point-of-Sale Terminal Power Input |
Use Scenario: Shielding low-noise amplifier front-ends and precision ADC reference paths in portable ultrasound or patient monitoring devices from ESD and cable discharge events. IC Role / Device Role / Timing Role: Localized TVS on 3.3 V analog supply and sensor bias rails to maintain signal integrity and measurement accuracy. Use Value: 5200 pF junction capacitance is acceptable for sub-MHz analog paths; clamping below 7.3 V avoids ADC saturation or op-amp rail-to-rail excursion. | Use Scenario: Protecting 3.3 V USB-powered logic and display controller inputs in retail kiosks subject to accidental AC mains coupling and electrostatic discharge in public environments. IC Role / Device Role / Timing Role: First-line transient suppressor on VDD_IO and USB D+/D− lines prior to ESD diode arrays. Use Value: Halogen-free construction meets IEC 61249-2-21 requirements for flame-retardant PCB assemblies in commercial indoor installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ3V3HE3_B/I | RoHS-compliant, AEC-Q101 qualified, but not halogen-free; same electrical specs and SMB package. | Lacks halogen-free certification required for certain green electronics mandates (e.g., China RoHS II Annex). | Select when halogen content is not restricted and cost optimization is prioritized over material compliance tier. |
| SMAJ3V3A-M3/5B | Lower PPPM (400 W), higher VC (8.0 V at 30 A), SMA (DO-214AC) package - smaller footprint, lower thermal mass. | Reduced surge handling limits suitability to less severe environments (e.g., consumer IoT vs. automotive). | Choose only if board space is constrained and peak surge energy remains ≤400 W; verify RθJA derating on actual layout. |
Compared with SMBJ3V3HM3/I, SMBJ3V3HE3_B/I offers identical protection performance with relaxed material compliance, while SMAJ3V3A-M3/5B trades surge robustness and thermal capability for compact size - making SMBJ3V3HM3/I optimal where AEC-Q101 + halogen-free + 600 W clamping are jointly required.
Availability
SMBJ3V3HM3/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and medical diagnostic equipment requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMBJ3V3HM3/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 optimization.
The SMBJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and medical systems where consistent clamping performance and long-term stability under thermal stress are mandatory.
FAQ
What is the maximum clamping voltage of SMBJ3V3HM3/I at 50 A?
The SMBJ3V3HM3/I has a maximum clamping voltage (VC) of 7.3 V when subjected to a 50 A peak pulse current with a 10/1000 μs waveform, as specified in the Vishay datasheet (Document Number: 88940). This value defines the upper voltage limit imposed on protected circuitry during standardized surge events and is measured under controlled test conditions with 0.2" × 0.2" copper pads. The SMBJ3V3HM3/I maintains this clamping performance across its rated temperature range.
Is SMBJ3V3HM3/I AEC-Q101 qualified and halogen-free?
Yes, SMBJ3V3HM3/I is both AEC-Q101 qualified and halogen-free. The "HM3" suffix explicitly denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified construction per Vishay's ordering nomenclature. This dual qualification makes SMBJ3V3HM3/I suitable for automotive applications requiring rigorous reliability validation and environmentally compliant materials, such as body control modules and ADAS sensor interfaces.
What is the junction-to-ambient thermal resistance (RθJA) for SMBJ3V3HM3/I?
The typical junction-to-ambient thermal resistance (RθJA) for SMBJ3V3HM3/I is 100 °C/W, measured under standard mounting conditions using the recommended PCB pad layout (0.2" × 0.2" copper pads per terminal). This value is critical for thermal derating calculations in high-temperature environments and must be used alongside the 5 W steady-state power dissipation rating (PD) and 175 °C maximum junction temperature to ensure safe long-term operation of SMBJ3V3HM3/I.
How does the junction capacitance of SMBJ3V3HM3/I affect high-speed signal lines?
The SMBJ3V3HM3/I exhibits a typical junction capacitance (CJ) of 5200 pF at 0 V and 1 MHz, which may load high-speed digital or RF signal paths. While appropriate for protecting low-frequency sensor outputs, power rails, and LIN/CAN stubs, this capacitance limits use on USB 2.0, Ethernet, or high-speed serial interfaces. For such applications, lower-capacitance TVS devices (e.g., <100 pF) should be selected instead of SMBJ3V3HM3/I.
What is the difference between SMBJ3V3HM3/I and SMBJ3V3-E3/52?
SMBJ3V3HM3/I and SMBJ3V3-E3/52 share identical electrical characteristics and SMB (DO-214AA) package, but differ in compliance and qualification: SMBJ3V3HM3/I is halogen-free and AEC-Q101 qualified, whereas SMBJ3V3-E3/52 is RoHS-compliant (non-halogen-free) and commercial-grade only. The "I" suffix in SMBJ3V3HM3/I indicates 13-inch tape-and-reel packaging (3200 units), while "/52" denotes 7-inch reels (750 units); both are valid for SMBJ3V3HM3/I sourcing.
SMBJ3V3HM3/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:
- Discontinued at Digi-Key
- 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/I FAQ
1.How can I place an order for SMBJ3V3HM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ3V3HM3/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/I reliable?
The price and inventory of SMBJ3V3HM3/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/I is usually 5 days.
3.What payment methods are accepted for SMBJ3V3HM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ3V3HM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ3V3HM3/I?
SMBJ3V3HM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ3V3HM3/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/I?
For technical support, including SMBJ3V3HM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ3V3HM3/I requirements.
6.How does Aetrix verify that SMBJ3V3HM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ3V3HM3/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/I meets industry standards.
7.What is the process for return or replacement of SMBJ3V3HM3/I?
All SMBJ3V3HM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ3V3HM3/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/I part is unused and in its original packaging.
Return procedure for SMBJ3V3HM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ3V3HM3/I Tags
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