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Vishay General Semiconductor - Diodes Division SMBJ3V3HE3/5B
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- Part No.:
- SMBJ3V3HE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ3V3HE3/5B.pdf
- Description:
- TVS DIODE 3.3VWM 10.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,530
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Product details
Overview
SMBJ3V3HE3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection of 3.3 V supply rails. 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 - deployed to safeguard ICs, MOSFETs, and sensor signal lines against inductive switching transients and ESD.
For engineers reviewing the SMBJ3V3HE3/5B datasheet, SMBJ3V3HE3/5B pinout, SMBJ3V3HE3/5B application, or SMBJ3V3HE3/5B equivalent, key selection criteria include clamping performance at 50 A, thermal resistance (RθJL = 20 °C/W), AEC-Q101 qualification status, junction capacitance (5200 pF @ 0 V), and compatibility with automated SMT assembly per J-STD-002.
Technical Context
This TVS diode operates as a unidirectional shunt clamp, triggered when reverse voltage exceeds its 4.1 V breakdown threshold. Its low clamping ratio (VC/VWM ≈ 2.21) ensures rapid energy diversion during transients while maintaining safe margin below 3.3 V system tolerance limits.
Designed for automotive-grade reliability, SMBJ3V3HE3/5B meets AEC-Q101 stress testing requirements and supports lead-free reflow up to 260 °C (MSL Level 1). Its 5200 pF junction capacitance and 200 A peak pulse current capability (8/20 µs) make it suitable for protecting low-speed digital and analog interfaces without signal integrity compromise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 3.3 V - Maximum continuous reverse working voltage; defines upper limit of normal operation before clamping initiates |
| VBR (min) | 4.1 V - Minimum breakdown voltage at 1 mA test current; ensures reliable turn-on above nominal rail |
| VC @ IPP = 50 A | 7.3 V - Clamped voltage under 10/1000 µs transient; limits downstream voltage stress during surge events |
| PPPM | 600 W - Peak pulse power handling (10/1000 µs); determines survivability against common industrial surges |
| Junction Capacitance | 5200 pF @ 0 V, 1 MHz - Impacts high-frequency signal integrity; appropriate for DC/low-speed lines, not RF or USB |
| TJ max | 175 °C - Maximum junction temperature; enables operation in under-hood automotive environments |
| RθJL | 20 °C/W - Thermal resistance junction-to-lead; informs PCB copper pad design for thermal management |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), AEC-Q101 qualified. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return plane; completes clamping loop during overvoltage events |
| Cathode | Protected line connection | Connected directly to 3.3 V rail or signal line; absorbs transient energy when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics use including engine control units and ADAS sensor interfaces |
| 600 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 surge waveforms in industrial applications |
| Clamping voltage ≤ 7.3 V @ 50 A | Keeps protected 3.3 V logic devices within absolute maximum rating limits during 10/1000 µs transients |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; compatible with high-volume manufacturing |
| Low RθJL = 20 °C/W | Supports sustained power dissipation on minimal PCB copper; reduces need for oversized heatsinking |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., temperature, pressure) in vehicle ECUs exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between 3.3 V supply and ground, clamping transients before they reach sensitive analog front-ends. Use Value: Prevents latch-up and permanent damage in AEC-Q100 Grade 2 ICs by limiting voltage excursion to ≤7.3 V during 50 A surges. | Use Scenario: Safeguarding digital input modules in programmable logic controllers subjected to relay coil flyback and field wiring ESD. IC Role / Device Role / Timing Role: Standoff-connected TVS on 3.3 V logic-level inputs, absorbing inductive kickback from 24 V solenoid drivers via optocoupler isolation stages. Use Value: Maintains functional safety integrity by ensuring no transient exceeds 3.3 V rail tolerance, avoiding false triggering or firmware lockup. |
| Consumer IoT Power Rail Protection | Medical Diagnostic Interface Protection |
Use Scenario: Securing 3.3 V microcontroller supply rails in battery-powered smart home hubs connected to external wired sensors. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main VDD line, coordinated with upstream fuse and downstream LDO for layered protection. Use Value: Extends device lifetime by suppressing >200 V transients induced by nearby AC mains switching, validated per IEC 61000-4-2 Level 4. | Use Scenario: Shielding isolated SPI/I²C communication lines between patient monitoring SoCs and analog front-end ASICs in portable diagnostic tools. IC Role / Device Role / Timing Role: Low-capacitance TVS on bidirectional data lines, placed adjacent to connectors to intercept ESD before reaching isolation barriers. Use Value: Preserves signal fidelity (5200 pF < 10 ns rise time impact) while meeting IEC 60601-1-2 ESD immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ3V3AHE3/5B | Bidirectional variant; symmetric clamping for AC-coupled or dual-polarity signal lines | Required where reverse polarity transients or AC signals must be suppressed in both directions | Select SMBJ3V3AHE3/5B only if bidirectional protection is explicitly needed; otherwise SMBJ3V3HE3/5B offers lower leakage and tighter VWM margin |
| SMCJ3V3HE3/5B | Higher power rating (1500 W), larger SMC (DO-214AB) package, higher VC (11.2 V @ 100 A) | Suitable for systems requiring greater surge margin or longer transient duration handling | Choose SMCJ3V3HE3/5B when 600 W is insufficient; verify PCB space and thermal layout accommodate larger footprint and higher clamping voltage |
Compared with SMBJ3V3HE3/5B, SMBJ3V3AHE3/5B adds bidirectional clamping at the cost of higher reverse leakage, while SMCJ3V3HE3/5B trades compact SMB size for higher surge capacity and relaxed layout constraints - making SMBJ3V3HE3/5B optimal for space-constrained 3.3 V rail protection with verified 600 W compliance.
Availability
SMBJ3V3HE3/5B is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and consumer IoT power management circuits requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for SMBJ3V3HE3/5B 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 automotive qualification.
The SMBJ series was developed specifically for high-reliability transient suppression in space-constrained 3.3 V to 170 V systems, balancing low clamping voltage, fast response, and AEC-Q101 compliance for harsh-environment electronics.
FAQ
What is the clamping voltage of SMBJ3V3HE3/5B at 50 A?
The SMBJ3V3HE3/5B has a maximum clamping voltage of 7.3 V when subjected to a 10/1000 µs transient pulse at 50 A. This value is measured under standardized test conditions and ensures that downstream 3.3 V components remain within their absolute maximum ratings during surge events. The SMBJ3V3HE3/5B achieves this with a tight VC/VWM ratio of approximately 2.21, critical for protecting modern low-voltage ICs.
Is SMBJ3V3HE3/5B AEC-Q101 qualified?
Yes, SMBJ3V3HE3/5B is AEC-Q101 qualified. The "HE3" suffix explicitly denotes RoHS-compliant and AEC-Q101 qualified construction, validated across temperature cycling, humidity bias, mechanical shock, and high-temperature operating life tests. This makes SMBJ3V3HE3/5B suitable for automotive applications such as body control modules and ADAS sensor interfaces where long-term reliability under thermal and vibration stress is mandatory.
What does the "5B" in SMBJ3V3HE3/5B indicate?
The "5B" in SMBJ3V3HE3/5B specifies the packaging configuration: 13-inch diameter plastic tape and reel, with a base quantity of 3200 units per reel. This format supports high-volume automated SMT placement and is compatible with industry-standard pick-and-place equipment. The "5B" designation is distinct from "52", which indicates a 7-inch reel with 750 units - both share identical electrical and mechanical specifications for SMBJ3V3HE3/5B.
Can SMBJ3V3HE3/5B be used for bidirectional signal line protection?
No, SMBJ3V3HE3/5B is unidirectional only and must not be used on AC-coupled or bidirectional signal lines without additional circuitry. Its cathode-anode polarity is fixed, with clamping active only for reverse-biased transients. For bidirectional protection, the SMBJ3V3AHE3/5B variant - which provides symmetrical clamping - is required. Using SMBJ3V3HE3/5B in bidirectional roles risks failure during positive-going transients on the anode side.
What is the junction capacitance of SMBJ3V3HE3/5B and how does it affect circuit design?
The SMBJ3V3HE3/5B exhibits a typical junction capacitance of 5200 pF at 0 V and 1 MHz. This relatively high capacitance limits its use to DC or low-frequency signal paths - such as power rails, reset lines, or slow digital interfaces - and makes it unsuitable for high-speed buses like USB, HDMI, or PCIe. Designers must verify that 5200 pF does not degrade rise/fall times or cause timing violations in the target application.
SMBJ3V3HE3/5B 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:
- 10.3V
- Current - Peak Pulse (10/1000µs):
- 200A (8/20µs)
- 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 (SMBJ)
SMBJ3V3HE3/5B FAQ
1.How can I place an order for SMBJ3V3HE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ3V3HE3/5B 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 SMBJ3V3HE3/5B reliable?
The price and inventory of SMBJ3V3HE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ3V3HE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ3V3HE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ3V3HE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ3V3HE3/5B?
SMBJ3V3HE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ3V3HE3/5B 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 SMBJ3V3HE3/5B?
For technical support, including SMBJ3V3HE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ3V3HE3/5B requirements.
6.How does Aetrix verify that SMBJ3V3HE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ3V3HE3/5B 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 SMBJ3V3HE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ3V3HE3/5B?
All SMBJ3V3HE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ3V3HE3/5B, 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 SMBJ3V3HE3/5B part is unused and in its original packaging.
Return procedure for SMBJ3V3HE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ3V3HE3/5B Tags
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