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Vishay General Semiconductor - Diodes Division SMBJ3V3-M3/52
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- Part No.:
- SMBJ3V3-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ3V3-M3/52.pdf
- Description:
- TVS DIODE 3.3VWM DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,860
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Product details
Overview
SMBJ3V3-M3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection of 3.3 V DC supply rails and signal lines. It features a 3.3 V standoff 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 with matte tin-plated leads.
For engineers reviewing the SMBJ3V3-M3/52 datasheet, SMBJ3V3-M3/52 pinout, SMBJ3V3-M3/52 application, or SMBJ3V3-M3/52 equivalent, key selection criteria include clamping performance under 50 A transients, junction temperature limits up to 175 °C, compliance with JESD201 Class 2 whisker resistance, halogen-free RoHS status, and suitability for automotive-grade designs when ordered with HM3 suffix.
Technical Context
This TVS diode operates in avalanche breakdown mode to clamp transient overvoltages before they damage downstream ICs. Its unidirectional polarity enables protection of positive-rail circuits without reverse conduction path concerns, and its 200 A peak pulse current capability (8/20 μs) supports robust surge immunity per IEC 61000-4-5 Level 4 requirements.
The device exhibits -5.3 × 10⁻⁴ /°C temperature coefficient of VBR and 5200 pF junction capacitance at 0 V, making it suitable for low-speed data lines and power rail protection where capacitive loading is not critical. Thermal resistance is 20 °C/W junction-to-lead and 100 °C/W junction-to-ambient on recommended PCB pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 3.3 V - Maximum continuous reverse operating voltage; ensures no conduction during normal 3.3 V rail operation |
| VBR (min) | 4.1 V - Minimum breakdown voltage at 1 mA test current; defines onset of clamping behavior |
| VC @ IPP | 7.3 V at 50 A (10/1000 μs) - Clamped voltage during standard lightning surge; limits stress on protected 3.3 V ICs |
| PPPM | 600 W - Peak pulse power handling; determines survivability against short-duration high-energy transients |
| IFSM | 60 A - Non-repetitive forward surge rating; supports inrush or fault-current events without bond-wire failure |
| TJ max | 175 °C - Maximum junction temperature; enables operation in under-hood automotive or industrial environments |
| CJ | 5200 pF at 0 V, 1 MHz - Junction capacitance; acceptable for RS-232, CAN, or power-line protection but not high-speed USB |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, cathode indicated by color band. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H). Molding compound meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or return path; completes clamping loop during transient events |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 3.3 V rail or signal); conducts avalanche current to anode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free, RoHS-compliant construction | M3 suffix confirms full halogen-free material set and RoHS compliance per EU Directive 2011/65/EU |
| AEC-Q101 qualification readiness | HM3 variant available; meets stress-test requirements for automotive electronics including temperature cycling and HTRB |
| MSL Level 1 moisture sensitivity | Rated for unlimited floor life at ≤30 °C/85 % RH; no baking required prior to reflow |
| Matte tin-plated leads | Ensures solderability per J-STD-002 and JESD22-B102; compatible with lead-free reflow profiles up to 260 °C peak |
| JESD201 Class 2 whisker resistance | Validated resistance to tin whisker growth under thermal cycling and humidity bias conditions |
Applications
| Industrial Power Supply Protection | Automotive Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 3.3 V microcontroller supply inputs in programmable logic controllers exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Primary clamping element placed directly at MCU VDD pin to limit transient excursions below absolute maximum ratings. Use Value: 7.3 V clamping at 50 A prevents latch-up or gate oxide damage in 3.3 V logic devices during 10/1000 μs surges. | Use Scenario: Shielding LIN bus transceiver I/O pins in body control modules from load dump and ISO 7637-2 pulse 5a transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between LIN line and ground to shunt induced spikes while preserving signal integrity. Use Value: 5200 pF capacitance avoids signal distortion on 20 kbps LIN, and 175 °C TJ max supports under-dash mounting. |
| Consumer USB Port ESD Protection | Medical Diagnostic Equipment Power Rail Guard |
Use Scenario: Safeguarding VBUS and D+/D− lines in USB 2.0 host ports against human-body-model (HBM) and IEC 61000-4-2 contact discharge. IC Role / Device Role / Timing Role: Secondary-level TVS used alongside integrated ESD diodes to handle higher-energy surges beyond IC-level protection. Use Value: 600 W PPPM absorbs multi-kV ESD events without degradation, and M3 halogen-free compliance meets medical device material restrictions. | Use Scenario: Securing 3.3 V analog front-end supply in portable ultrasound units subjected to electrostatic discharge during clinical handling. IC Role / Device Role / Timing Role: Standoff-rated TVS mounted at LDO output to prevent transient coupling into sensitive ADC reference paths. Use Value: 3.3 V VWM ensures zero leakage during battery-powered operation, and 200 A 8/20 μs rating covers defibrillator-induced surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ3V3-E3/52 | Same electrical specs; RoHS-compliant but not halogen-free; E3 suffix denotes standard commercial grade | Lacks halogen-free certification; unsuitable for medical or automotive programs requiring halogen restriction | Select SMBJ3V3-M3/52 when halogen-free compliance is mandated by end-equipment standards |
| SAC3V3-01A-HF | Lower PPPM (300 W); smaller SOD-123FL package; 5.5 V VC @ 20 A; 1000 pF CJ | Better suited for space-constrained, high-speed signal lines due to lower capacitance and faster response | Choose SAC3V3-01A-HF for compact layouts or data lines needing <2000 pF; retain SMBJ3V3-M3/52 for high-energy power rail clamping |
Compared with SMBJ3V3-E3/52, SMBJ3V3-M3/52 adds halogen-free assurance without trade-offs in clamping or thermal performance; versus SAC3V3-01A-HF, it delivers double the pulse power and higher surge current tolerance at the cost of larger footprint and greater capacitance-making it optimal for robust 3.3 V rail protection where board area permits.
Availability
SMBJ3V3-M3/52 is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor interfaces, consumer USB port protection, and medical diagnostic equipment requiring stable component supply with halogen-free compliance and AEC-Q101 upgrade path.
Supply support for SMBJ3V3-M3/52 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, power efficiency, and automotive qualification.
The SMBJ series is engineered specifically for high-energy transient suppression in 3.3 V to 170 V systems, targeting design-in across automotive, industrial automation, and medical electronics where robustness and long-term supply stability are critical.
FAQ
What is the clamping voltage of SMBJ3V3-M3/52 at 50 A?
The SMBJ3V3-M3/52 has a maximum clamping voltage (VC) of 7.3 V at 50 A using a 10/1000 μs waveform. This value is measured under standardized surge conditions and guarantees that protected 3.3 V ICs experience no more than 7.3 V during such transients, staying well within safe operating limits.
Is SMBJ3V3-M3/52 suitable for automotive applications?
SMBJ3V3-M3/52 is halogen-free and RoHS-compliant, but not AEC-Q101 qualified. For automotive use, specify SMBJ3V3HM3_B/H or SMBJ3V3HM3_B/I - the HM3 suffix denotes full AEC-Q101 qualification, including temperature cycling, HTRB, and ESD testing per automotive reliability standards.
What does the "M3" suffix mean in SMBJ3V3-M3/52?
The "M3" suffix in SMBJ3V3-M3/52 indicates halogen-free, RoHS-compliant construction with matte tin-plated leads meeting JESD201 Class 2 whisker resistance. It distinguishes this variant from E3 (RoHS only) and HM3 (AEC-Q101 + halogen-free) versions of the same SMBJ3V3-M3/52 base device.
Can SMBJ3V3-M3/52 be used for bidirectional transient protection?
No, SMBJ3V3-M3/52 is unidirectional only. Its electrical characteristics - including VBR, VWM, and clamping behavior - are specified for reverse-biased operation only. For bidirectional protection, consider the SMBJ3V3CA-M3/52 or equivalent dual-diode configuration.
What is the thermal resistance of SMBJ3V3-M3/52?
SMBJ3V3-M3/52 has a typical thermal resistance of 20 °C/W from junction to lead (RθJL) and 100 °C/W from junction to ambient (RθJA), measured on 0.2" × 0.2" copper pads per terminal. These values inform heatsinking decisions and derating curves for sustained power dissipation above 5 W.
SMBJ3V3-M3/52 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):
- -
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ3V3-M3/52 FAQ
1.How can I place an order for SMBJ3V3-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ3V3-M3/52 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 SMBJ3V3-M3/52 reliable?
The price and inventory of SMBJ3V3-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ3V3-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ3V3-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ3V3-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ3V3-M3/52?
SMBJ3V3-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ3V3-M3/52 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 SMBJ3V3-M3/52?
For technical support, including SMBJ3V3-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ3V3-M3/52 requirements.
6.How does Aetrix verify that SMBJ3V3-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ3V3-M3/52 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 SMBJ3V3-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ3V3-M3/52?
All SMBJ3V3-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ3V3-M3/52, 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 SMBJ3V3-M3/52 part is unused and in its original packaging.
Return procedure for SMBJ3V3-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ3V3-M3/52 Tags
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