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Vishay General Semiconductor - Diodes Division SMBJ3V3HE3_A/H
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- Part No.:
- SMBJ3V3HE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ3V3HE3_A/H.pdf
- Description:
- TVS DIODE 3.3VWM 10.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,134
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Product details
Overview
SMBJ3V3HE3_A/H 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_A/H datasheet, SMBJ3V3HE3_A/H pinout, SMBJ3V3HE3_A/H application, or SMBJ3V3HE3_A/H equivalent, key selection criteria include clamping performance under 50 A IPP, thermal resistance (RθJA = 100 °C/W), AEC-Q101 qualification status, junction capacitance (5200 pF at 0 V), and compatibility with automated SMT assembly per J-STD-002.
Technical Context
This TVS diode operates exclusively in unidirectional mode, with cathode marked by a band. Its silicon avalanche structure delivers sub-nanosecond response to transients, enabling effective suppression of fast-rising surges such as those from relay coil de-energization or lightning-induced coupling on low-voltage interfaces.
Thermal design relies on PCB copper pad layout: 0.2" × 0.2" (5.0 mm × 5.0 mm) pads per terminal yield RθJL = 20 °C/W and support 5 W steady-state dissipation at TA = 75 °C. The device is rated for TJ up to +175 °C and meets MSL Level 1 reflow profile (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 3.3 V - Maximum continuous reverse working voltage before leakage exceeds 200 μA; matches nominal 3.3 V rail without false triggering. |
| VBR (min) | 4.1 V - Minimum breakdown voltage at 1 mA test current; ensures reliable conduction onset above normal operating voltage. |
| VC @ IPP | 7.3 V at 50 A (10/1000 μs) - Clamped voltage during standardized surge; limits downstream stress to safe levels for 3.3 V logic. |
| PPPM | 600 W - Peak pulse power handling capability; defines maximum transient energy absorption per event. |
| CJ | 5200 pF at 0 V, 1 MHz - Junction capacitance impacts high-speed signal integrity; suitable for DC/low-frequency I/O, not RF lines. |
| TJ max | +175 °C - Maximum junction temperature; enables operation in under-hood automotive or industrial environments. |
| RθJA | 100 °C/W - Thermal resistance to ambient on recommended PCB layout; informs derating for sustained power dissipation. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic case meeting UL 94 V-0. Cathode indicated by color band. Matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
| 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 or low-impedance return plane; completes clamping path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces. |
| 600 W peak pulse power | Withstands high-energy transients like ISO 7637-2 Pulse 1 and Pulse 2b without degradation. |
| MSL Level 1 rating | Compatible with standard lead-free reflow profiles up to 260 °C peak, eliminating pre-bake requirements. |
| Low clamping ratio (VC/VBR ≈ 1.78) | Minimizes overvoltage overshoot during clamping, enhancing protection margin for 3.3 V devices. |
| Halogen-free option available | HM3 suffix variants meet environmental compliance requirements for green manufacturing and RoHS+ initiatives. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) in vehicle ECUs exposed to load dump and inductive kick. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and ground, clamping transients before they reach the transceiver input stage. Use Value: Prevents latch-up or permanent damage to 3.3 V interface ICs during ISO 16750-2 tests; validated under AEC-Q101 stress conditions. | Use Scenario: Shielding digital input modules in programmable logic controllers from field-wiring induced surges (e.g., motor contactor switching, solenoid de-energization). IC Role / Device Role / Timing Role: Standoff-clamp TVS on 24 V-to-3.3 V level-shifted inputs, absorbing 50 A 10/1000 μs pulses without failure. Use Value: Maintains functional safety integrity by limiting voltage excursion to ≤7.3 V during surge events, preserving MCU GPIO reliability. |
| Consumer IoT Power Rail Protection | Medical Diagnostic Equipment Interface Protection |
Use Scenario: Safeguarding USB-powered microcontroller-based edge nodes (e.g., smart sensors) against ESD and hot-swap transients on 3.3 V supply lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on VDD rail, positioned upstream of LDO regulators and digital ICs. Use Value: Ensures uninterrupted operation during ±8 kV contact ESD per IEC 61000-4-2, with no reset or brownout due to rail collapse. | Use Scenario: Protecting analog front-end (AFE) inputs of portable ultrasound or ECG units connected to patient electrodes subject to defibrillation recovery spikes. IC Role / Device Role / Timing Role: First-stage transient suppressor on isolated signal paths feeding precision ADCs operating from 3.3 V supplies. Use Value: Limits transient-induced offset errors and prevents saturation of instrumentation amplifiers via controlled clamping at 7.3 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ3V3HE3_B/I | Same electrical specs; differs only in packaging - 3200-unit 13" tape-and-reel vs. 750-unit 7" reel for SMBJ3V3HE3_A/H. | No functional difference; suited for high-volume SMT lines requiring larger reels to reduce changeover frequency. | Select SMBJ3V3HE3_B/I when optimizing for production throughput and minimizing feeder reloads. |
| SAC3V3 | Lower PPPM (300 W), higher VC (12.5 V at 20 A), smaller SOD-123 package; not AEC-Q101 qualified. | Limited to cost-sensitive consumer applications where surge severity is lower and automotive qualification is unnecessary. | Choose SAC3V3 only for non-automotive, space-constrained designs accepting reduced clamping performance and no automotive validation. |
Compared with SMBJ3V3HE3_A/H, SMBJ3V3HE3_B/I offers identical protection performance with optimized packaging for volume production, while SAC3V3 trades clamping efficacy and qualification for size and cost - making SMBJ3V3HE3_A/H the preferred choice for AEC-Q101–required 3.3 V rail protection demanding 600 W surge resilience.
Availability
SMBJ3V3HE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and medical diagnostic equipment requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SMBJ3V3HE3_A/H 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, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SMBJ series was engineered specifically for high-energy transient suppression in harsh environments - targeting 3.3 V to 48 V systems where clamping accuracy, surge robustness, and long-term stability are critical.
FAQ
What is the clamping voltage of SMBJ3V3HE3_A/H at 50 A?
The SMBJ3V3HE3_A/H 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. This value is measured at TA = 25 °C and ensures that protected 3.3 V circuits remain within safe operating limits during surge events. The SMBJ3V3HE3_A/H maintains this clamping performance across its qualified temperature range.
Is SMBJ3V3HE3_A/H qualified for automotive use?
Yes, SMBJ3V3HE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation (Document Number: 88940). This qualification covers stress tests including temperature cycling, humidity bias, and mechanical shock - validating SMBJ3V3HE3_A/H for under-hood and body electronics applications where reliability is mission-critical.
What package type does SMBJ3V3HE3_A/H use?
SMBJ3V3HE3_A/H uses the SMB (DO-214AA) surface-mount package, with dimensions of 4.57 mm × 3.94 mm × 2.29 mm. The package features matte tin-plated leads, complies with UL 94 V-0 flammability rating, and supports MSL Level 1 handling. Its standardized footprint allows drop-in replacement within existing SMB layouts.
How does SMBJ3V3HE3_A/H differ from the commercial-grade SMBJ3V3-E3?
SMBJ3V3HE3_A/H adds AEC-Q101 qualification and tighter process controls versus the commercial-grade SMBJ3V3-E3, while retaining identical electrical parameters (VWM = 3.3 V, VBR = 4.1 V, VC = 7.3 V). The "HE3" suffix denotes automotive qualification; "E3" is RoHS-compliant but not AEC-Q101 tested. SMBJ3V3HE3_A/H is required for automotive BOMs where qualification evidence is mandatory.
What is the junction capacitance of SMBJ3V3HE3_A/H?
The SMBJ3V3HE3_A/H exhibits a typical junction capacitance (CJ) of 5200 pF at 0 V and 1 MHz, as specified in the Vishay datasheet. This value reflects the device's physical die size and construction optimized for high-power clamping - making it appropriate for DC and low-frequency signal lines, but unsuitable for high-speed data buses where sub-100 pF is required.
SMBJ3V3HE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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_A/H FAQ
1.How can I place an order for SMBJ3V3HE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ3V3HE3_A/H 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_A/H reliable?
The price and inventory of SMBJ3V3HE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ3V3HE3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ3V3HE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ3V3HE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ3V3HE3_A/H?
SMBJ3V3HE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ3V3HE3_A/H 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_A/H?
For technical support, including SMBJ3V3HE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ3V3HE3_A/H requirements.
6.How does Aetrix verify that SMBJ3V3HE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ3V3HE3_A/H 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_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ3V3HE3_A/H?
All SMBJ3V3HE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ3V3HE3_A/H, 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_A/H part is unused and in its original packaging.
Return procedure for SMBJ3V3HE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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