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Vishay General Semiconductor - Diodes Division SMBJ3V3-E3/52
- Part No.:
- SMBJ3V3-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ3V3-E3/52.pdf
- Description:
- TVS DIODE 3.3VWM 10.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:136,957
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Product details
Overview
SMBJ3V3-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for clamping transient overvoltages on 3.3 V supply rails. It features a 3.3 V stand-off voltage (VWM), 4.1 V minimum breakdown voltage (VBR), 7.3 V maximum clamping voltage at 50 A (10/1000 μs), 600 W peak pulse power rating, and SMB (DO-214AA) package with matte tin-plated leads. It is widely used to protect sensitive ICs, MOSFETs, and sensor signal lines in industrial and automotive electronics.
For engineers reviewing the SMBJ3V3-E3/52 datasheet, SMBJ3V3-E3/52 pinout, SMBJ3V3-E3/52 application, or SMBJ3V3-E3/52 equivalent, key selection criteria include clamping performance at 50 A IPP, thermal resistance (RθJA = 100 °C/W), junction temperature range (–65 °C to +175 °C), unidirectional polarity, and AEC-Q101 qualification availability via HE3 suffix variants.
Technical Context
The SMBJ3V3-E3/52 operates as a unidirectional avalanche diode that enters conduction when reverse voltage exceeds its 4.1 V breakdown threshold, limiting transient energy by clamping to ≤7.3 V at 50 A (10/1000 μs). Its low RθJA of 100 °C/W enables reliable operation under repetitive surge conditions when mounted on standard 5.0 mm × 5.0 mm copper pads.
It delivers 600 W peak pulse power handling with fast response time (<1 ns), supports 60 A non-repetitive forward surge current (IFSM), and exhibits –5.3 × 10⁻⁴ /°C temperature coefficient of VBR - ensuring stable clamping across –65 °C to +175 °C operating junction range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 3.3 V - Maximum continuous reverse working voltage before clamping begins; matches 3.3 V logic/supply rail systems. |
| VBR (min) | 4.1 V - Minimum breakdown voltage at 1 mA test current; ensures reliable turn-on above normal operating voltage. |
| VC @ IPP = 50 A | 7.3 V - Clamped voltage during 10/1000 μs transient; limits stress on downstream 3.3 V components. |
| PPPM | 600 W - Peak pulse power dissipation capability; withstands high-energy transients per IEC 61000-4-5. |
| IPP (10/1000 μs) | 50 A - Corresponding peak pulse current at rated clamping voltage; defines surge current handling capacity. |
| TJ max. | +175 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial environments. |
| CJ @ 0 V | 5200 pF - Junction capacitance at zero bias; impacts high-frequency signal integrity in data line protection. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic case meeting UL 94 V-0 flammability rating; cathode indicated by color band; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to system ground or lower-potential node | Completes clamping path during transient events; must be routed to low-impedance ground plane. |
| Cathode | Current exit terminal in forward bias; marked by color band; connected to protected line | Connected directly to 3.3 V rail or signal line; determines unidirectional clamping direction toward ground. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional polarity | Enables precise clamping from protected line to ground only - avoids interference with bidirectional signaling or DC bias conditions. |
| 600 W peak pulse power (10/1000 μs) | Provides robust immunity against lightning-induced surges and inductive switching spikes per IEC 61000-4-5 Level 3/4. |
| Clamping voltage ≤7.3 V at 50 A | Ensures protected 3.3 V ICs remain within absolute maximum ratings during worst-case transients. |
| AEC-Q101 qualified variant available | Supports automotive-grade reliability requirements including temperature cycling, HTRB, and ESD testing - base code HE3/HM3 required. |
| MSL Level 1 (260 °C reflow) | Enables single-pass lead-free reflow assembly without moisture-related popcorn failure risk. |
Applications
| Industrial Sensor Interface Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protecting analog and digital signal lines (e.g., I²C, CAN, LIN) from ESD and load dump in factory automation sensors. IC Role / Device Role: Unidirectional TVS placed between microcontroller GPIO and external connector. Use Value: Limits transient voltage to ≤7.3 V during 50 A surges, preserving signal integrity and preventing latch-up in 3.3 V interface ICs. | Use Scenario: Safeguarding 3.3 V power domains feeding MCU peripherals in BCM modules exposed to alternator load dump. IC Role / Device Role: Primary rail clamp on 3.3 V LDO output or microcontroller VDD line. Use Value: Absorbs up to 600 W surge energy while maintaining clamping below 7.3 V - critical for AEC-Q100-compliant subsystems. |
| USB Port ESD Protection | IoT Edge Node Power Rail Protection |
Use Scenario: Secondary-level ESD protection on VBUS or D+/D− lines in USB 2.0 host ports powered by 3.3 V supplies. IC Role / Device Role: Standoff-clamp TVS positioned after primary common-mode choke and before USB transceiver. Use Value: 5200 pF junction capacitance is acceptable for full-speed USB (≤12 Mbps); clamps ±8 kV contact ESD per IEC 61000-4-2. | Use Scenario: Securing 3.3 V supply input of battery-powered wireless sensor nodes subject to field wiring transients. IC Role / Device Role: Input-stage TVS on main power entry before buck converter or LDO regulator. Use Value: Withstands repeated 50 A surges without degradation; –65 °C to +175 °C TJ range ensures reliability in outdoor enclosures. |
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 | Bidirectional variant; symmetric clamping (±3.3 V VWM); higher VC (≈11.2 V at 50 A) | Suitable for AC-coupled or differential signal lines requiring symmetrical surge protection | Select only if bidirectional clamping is required; not interchangeable for unidirectional 3.3 V rail protection. |
| 1.5SMC3.3A | Same VWM/VBR but SMC package (DO-214AB); higher PPPM (1500 W); larger footprint (7.11 mm × 6.22 mm) | Used where higher surge margin is needed and PCB space allows larger package | Choose when 600 W is insufficient; requires layout change due to different pad dimensions and thermal mass. |
Compared with SMBJ3V3-E3/52, SMBJ3V3A-E3/52 adds bidirectional capability at the cost of higher clamping voltage and reduced suitability for DC rail protection, while 1.5SMC3.3A offers greater surge capacity in a physically larger package - both require explicit validation for pin compatibility, thermal design, and board layout impact.
Availability
SMBJ3V3-E3/52 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, USB port protection, and IoT edge node power rail protection requiring stable component supply and RoHS-compliant commercial-grade TVS diodes.
Supply support for SMBJ3V3-E3/52 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, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in compact surface-mount form factors, targeting automotive, industrial, and communications systems where space-constrained 3.3 V rail protection is critical.
FAQ
What is the clamping voltage of SMBJ3V3-E3/52 at 50 A?
The SMBJ3V3-E3/52 has a maximum clamping voltage (VC) of 7.3 V at 50 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized test conditions and ensures protected 3.3 V circuits remain within safe operating limits during surge events. The SMBJ3V3-E3/52 achieves this clamping performance while maintaining low leakage current and stable thermal behavior up to +175 °C junction temperature.
Is SMBJ3V3-E3/52 suitable for automotive applications?
The SMBJ3V3-E3/52 itself is commercial-grade (RoHS-compliant, MSL Level 1), but Vishay offers AEC-Q101 qualified versions under ordering codes SMBJ3V3HE3_B/H and SMBJ3V3HM3_B/H. For automotive use, specify the HE3 or HM3 suffix variants - the SMBJ3V3-E3/52 alone is not AEC-Q101 certified and should be used only in non-automotive or pre-qualification development contexts.
What does the "E3/52" suffix mean in SMBJ3V3-E3/52?
The "E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads; "/52" specifies packaging in 7″ diameter plastic tape and reel with 750 units per reel. This format aligns with Vishay's standard ordering nomenclature and ensures compatibility with automated SMT placement equipment. The SMBJ3V3-E3/52 is not halogen-free - for that specification, select the M3 suffix variant.
How does SMBJ3V3-E3/52 compare to SMAJ3V3 in terms of performance?
The SMBJ3V3-E3/52 offers higher peak pulse power (600 W vs. 400 W for SMAJ3V3) and superior thermal performance (RθJA = 100 °C/W vs. ~120 °C/W) due to its larger SMB package. Both share identical VWM (3.3 V) and VBR (4.1 V), but SMBJ3V3-E3/52 supports higher surge currents and better power dissipation - making it preferred for demanding industrial and automotive applications where reliability margins matter.
Can SMBJ3V3-E3/52 be used for bidirectional signal line protection?
No - SMBJ3V3-E3/52 is strictly unidirectional and clamps only from the protected line to ground. For bidirectional signal lines (e.g., RS-485, CAN, or USB D+/D−), use the bidirectional variant SMBJ3V3A-E3/52 instead. Using SMBJ3V3-E3/52 on bidirectional paths risks forward conduction during negative transients, potentially damaging upstream drivers or distorting signal waveforms.
SMBJ3V3-E3/52 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):
- 4.1V
- Voltage - Clamping (Max) @ Ipp:
- 10.3V
- Current - Peak Pulse (10/1000µs):
- 200A (8/20µs)
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 5200pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ3V3-E3/52 FAQ
1.How can I place an order for SMBJ3V3-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ3V3-E3/52 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-E3/52 reliable?
The price and inventory of SMBJ3V3-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ3V3-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ3V3-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ3V3-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ3V3-E3/52?
SMBJ3V3-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ3V3-E3/52 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-E3/52?
For technical support, including SMBJ3V3-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ3V3-E3/52 requirements.
6.How does Aetrix verify that SMBJ3V3-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ3V3-E3/52 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-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ3V3-E3/52?
All SMBJ3V3-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ3V3-E3/52, 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-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ3V3-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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