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Vishay General Semiconductor - Diodes Division SMBJ3V3HM3_A/H
- Part No.:
- SMBJ3V3HM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ3V3HM3_A/H.pdf
- Description:
- TVS DIODE 3.3VWM 7.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,608
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Product details
Overview
SMBJ3V3HM3_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 and signal lines. 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 in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMBJ3V3HM3_A/H datasheet, SMBJ3V3HM3_A/H pinout, SMBJ3V3HM3_A/H application, or SMBJ3V3HM3_A/H equivalent, key selection criteria include clamping performance under 50 A transients, AEC-Q101 qualification status, junction capacitance (5200 pF at 0 V), thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT assembly per J-STD-002.
Technical Context
This TVS diode operates as a unidirectional clamping device, triggered when reverse voltage exceeds 4.1 V (VBR), limiting transient energy by shunting surge current to ground. Its 7.3 V clamping voltage at 50 A ensures downstream 3.3 V ICs remain within absolute maximum ratings during ESD or load-switching events.
Thermal design relies on low RθJL (20 °C/W) when mounted on 5.0 mm × 5.0 mm copper pads, enabling reliable operation up to TJ = 175 °C. The device meets MSL Level 1 (260 °C peak reflow) and supports halogen-free, RoHS-compliant manufacturing via HM3 suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 3.3 V - Maximum continuous reverse operating voltage before conduction begins; matches nominal 3.3 V rail systems. |
| VBR (min) | 4.1 V - Minimum breakdown voltage at 1 mA test current; defines turn-on threshold for transient suppression. |
| VC @ IPP | 7.3 V at 50 A (10/1000 μs) - Clamped voltage seen by protected circuit during standardized surge; critical for IC survivability. |
| PPPM | 600 W - Peak pulse power handling capability; determines energy absorption capacity for short-duration transients. |
| CJ @ 0 V | 5200 pF - Junction capacitance at zero bias; impacts high-speed signal integrity on data lines like CAN or UART. |
| TJ max | 175 °C - Maximum junction temperature; enables use in under-hood automotive environments and industrial enclosures. |
| IFSM | 60 A - Non-repetitive forward surge current rating; supports handling of inductive kickback without failure. |
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). Mounting requires 5.0 mm × 5.0 mm copper pads per terminal per datasheet recommendation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VREV > VBR. |
| Anode | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor modules per stress test requirements. |
| Halogen-free & RoHS-compliant | Meets environmental compliance mandates for Tier 1 automotive suppliers and industrial OEMs with strict material declarations. |
| MSL Level 1 | Rated for lead-free reflow up to 260 °C peak, supporting standard SMT assembly without moisture sensitivity concerns. |
| Low clamping ratio | VC/VWM = 2.2 - Efficient suppression margin ensures minimal overvoltage stress on 3.3 V logic while maintaining noise immunity. |
| High IPPM | 200 A @ 8/20 μs - Supports protection against severe lightning-induced surges in industrial fieldbus installations. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting 3.3 V analog sensor outputs (e.g., pressure, temperature) in engine bay ECUs from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between sensor output and microcontroller ADC input. Use Value: Limits transient voltage to ≤7.3 V during 50 A surges, preventing ADC saturation and latch-up in automotive-grade MCUs. | Use Scenario: Shielding RS-485 transceiver pins in programmable logic controllers exposed to motor drive noise and EFT bursts. IC Role / Device Role / Timing Role: Line-side TVS on differential bus lines to absorb common-mode transients before signal conditioning stage. Use Value: Maintains signal integrity with 5200 pF capacitance compatible with ≤500 kbps data rates while surviving 200 A (8/20 μs) surges. |
| Power Supply Rail Protection | USB Port ESD Protection |
Use Scenario: Safeguarding 3.3 V LDO outputs feeding FPGA configuration memory and clock buffers in telecom base stations. IC Role / Device Role / Timing Role: Secondary overvoltage clamp downstream of primary DC/DC converter, absorbing switching node coupling. Use Value: Withstands 600 W peak pulses without degradation, ensuring long-term reliability across thermal cycles from -40 °C to +125 °C ambient. | Use Scenario: ESD protection for USB 2.0 D+ and D- lines in embedded host controllers where cost and board space constrain multi-device solutions. IC Role / Device Role / Timing Role: Bidirectional-capable layout not applicable; SMBJ3V3HM3_A/H used in unidirectional rail-to-rail clamp configuration with series impedance. Use Value: Provides 30 kV HBM ESD immunity per IEC 61000-4-2, validated by AEC-Q101 stress testing for production deployment. |
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_A/H | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification. | Preferred for commercial-industrial designs where halogen content is unrestricted. | Select SMBJ3V3HE3_A/H when halogen-free requirement is absent and cost optimization is prioritized. |
| SMAJ3V3-QH | Lower PPPM (400 W), higher VC (8.5 V @ 25 A), SMA package (smaller footprint, higher RθJA). | Suitable for space-constrained consumer electronics with lower surge exposure. | Choose SMAJ3V3-QH only if 600 W rating and automotive qualification are not required. |
Compared with SMBJ3V3HE3_A/H, SMBJ3V3HM3_A/H adds halogen-free compliance without sacrificing clamping performance or qualification; versus SMAJ3V3-QH, it delivers 50 % higher surge power handling and tighter voltage control - essential for mission-critical automotive and industrial deployments.
Availability
SMBJ3V3HM3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and 3.3 V power rail safeguarding requiring stable component supply across extended product lifecycles.
Supply support for SMBJ3V3HM3_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, MOSFETs, and protection devices with emphasis on reliability and automotive-grade validation.
The SMBJ series is engineered specifically for high-energy transient suppression in harsh environments, targeting AEC-Q101-compliant automotive subsystems and ruggedized industrial controls where consistent clamping behavior and thermal resilience are mandatory.
FAQ
What is the clamping voltage of SMBJ3V3HM3_A/H at 50 A?
The SMBJ3V3HM3_A/H has a maximum clamping voltage (VC) of 7.3 V when subjected to a 10/1000 μs waveform with a peak current of 50 A. This value is measured per JEDEC standards and ensures protected circuits remain within safe operating limits during surge events. The SMBJ3V3HM3_A/H maintains this clamping performance across its qualified temperature range and after repeated stress cycles.
Is SMBJ3V3HM3_A/H qualified for automotive applications?
Yes, SMBJ3V3HM3_A/H is AEC-Q101 qualified, confirming its suitability for automotive electronic systems including engine control, body electronics, and ADAS sensors. The HM3 suffix denotes halogen-free, RoHS-compliant construction, and the device meets MSL Level 1 reflow requirements. This qualification is documented in Vishay's official specification document 88940.
What does the "HM3" suffix mean in SMBJ3V3HM3_A/H?
The "HM3" suffix in SMBJ3V3HM3_A/H indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes the part from commercial-grade variants (e.g., "E3" or "M3") and confirms compliance with automotive material restrictions. The "A/H" revision code specifies the manufacturing lot and packaging format per Vishay's ordering nomenclature in document 88940.
Can SMBJ3V3HM3_A/H be used for bidirectional transient protection?
No, SMBJ3V3HM3_A/H is a unidirectional TVS diode and is not rated for bidirectional operation. Its electrical characteristics - including VBR, VC, and IPP - are specified only for reverse-biased conditions. For bidirectional protection, a dedicated bidirectional TVS such as SMBJ3V3CA must be selected; using SMBJ3V3HM3_A/H in reverse polarity configurations may result in device failure or inadequate clamping.
What is the junction capacitance of SMBJ3V3HM3_A/H and how does it affect signal lines?
The SMBJ3V3HM3_A/H exhibits a typical junction capacitance (CJ) of 5200 pF at 0 V bias and 1 MHz. This value impacts high-speed digital lines by introducing loading and potential signal rise-time degradation. It is appropriate for low-to-medium speed interfaces (e.g., RS-485 ≤500 kbps, CAN ≤1 Mbps) but generally unsuitable for USB 2.0 or HDMI without additional filtering. The SMBJ3V3HM3_A/H datasheet provides capacitance vs. voltage curves for precise system modeling.
SMBJ3V3HM3_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:
- 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_A/H FAQ
1.How can I place an order for SMBJ3V3HM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ3V3HM3_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 SMBJ3V3HM3_A/H reliable?
The price and inventory of SMBJ3V3HM3_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 SMBJ3V3HM3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ3V3HM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ3V3HM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ3V3HM3_A/H?
SMBJ3V3HM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ3V3HM3_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 SMBJ3V3HM3_A/H?
For technical support, including SMBJ3V3HM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ3V3HM3_A/H requirements.
6.How does Aetrix verify that SMBJ3V3HM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ3V3HM3_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 SMBJ3V3HM3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ3V3HM3_A/H?
All SMBJ3V3HM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ3V3HM3_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 SMBJ3V3HM3_A/H part is unused and in its original packaging.
Return procedure for SMBJ3V3HM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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