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STMicroelectronics SMLVT3V3
- Part No.:
- SMLVT3V3
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMLVT3V3.pdf
- Description:
- TVS DIODE 3.3VWM 10.3VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:18,892
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Product details
Overview
SMLVT3V3 from STMicroelectronics is a unidirectional low-voltage Transil™ TVS diode designed for transient overvoltage protection of 3.3 V logic circuits and I/O interfaces. It features a 3.3 V stand-off voltage, 7.3 V clamping voltage at 1 A (10/1000 µs), 600 W peak pulse power rating, 5200 pF junction capacitance at 0 V, and SMB (DO-214AA) package with cathode bar marking.
For engineers reviewing the SMLVT3V3 datasheet, SMLVT3V3 pinout, SMLVT3V3 application, or SMLVT3V3 equivalent, key selection criteria include clamping performance under 10/1000 µs surge, leakage current below 200 µA at 3.3 V, thermal resistance of 20 °C/W (junction-to-leads), and compatibility with FR4 PCB layouts using the JEDEC-standard SMB footprint.
Technical Context
This device operates as a voltage-clamping transient suppressor in parallel with protected circuitry. Its planar junction structure enables fast response time (<1 ns), while the unidirectional configuration provides forward conduction path during negative transients only when reverse-biased beyond VBR (min. 4.1 V).
The SMB package supports surface-mount assembly with defined thermal path to PCB copper; Rth(j-l) = 20 °C/W ensures effective heat dissipation during repetitive surges up to 6 W continuous power at 50 °C ambient, and Tj range spans –55 °C to +175 °C for industrial and automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage | 3.3 V - Maximum continuous reverse operating voltage before breakdown; matches 3.3 V supply rail tolerance. |
| Breakdown Voltage (min) | 4.1 V at 1 mA - Ensures reliable turn-on above normal operating voltage but below IC absolute maximum ratings. |
| Clamping Voltage | 7.3 V at 1 A (10/1000 µs) - Limits transient voltage seen by downstream 3.3 V ICs to safe level during ESD/EFT events. |
| Junction Capacitance | 5200 pF at 0 V, 1 MHz - Impacts high-speed signal integrity; suitable for low-frequency I/O (e.g., UART, SMBus), not USB 2.0 or HDMI. |
| Peak Pulse Power | 600 W (10/1000 µs) - Withstands IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge without failure. |
| Leakage Current | ≤200 µA at 3.3 V - Minimizes standby power loss and avoids false triggering in battery-powered systems. |
| Thermal Resistance (j-l) | 20 °C/W - Enables direct thermal coupling to PCB copper pour for sustained surge handling without heatsink. |
Pinout & Package
Package: SMB (JEDEC DO-214AA), surface-mount, molded plastic case with planar junction, RoHS-compliant, UL94 V0 epoxy, cathode indicated by bar marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to protected line (e.g., USB D+, CAN_H); conducts during negative transients when reverse-biased. |
| Cathode | Clamping reference / ground connection point | Connected to system ground or low-impedance return plane; defines clamping threshold relative to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Low clamping factor (VCL/VBR) | 1.78 - Tight ratio between clamping and breakdown voltages improves margin for 3.3 V ICs with 7 V absolute max ratings. |
| Fast response time | <1 ns - Prevents sub-nanosecond ESD pulses from propagating past the diode into sensitive inputs. |
| High surge robustness | 100 A non-repetitive forward surge (10 ms) - Survives lightning-induced surges on long cables or unshielded connectors. |
| Wide temperature operation | –55 °C to +175 °C junction range - Supports under-hood automotive and industrial control applications without derating. |
Applications
| Industrial Serial Interface Protection | Automotive Body Control Module I/O |
|---|---|
Use Scenario: Protecting RS-232/RS-485 transceivers and microcontroller UART lines against ESD and cable discharge events in factory automation equipment. IC Role / Device Role / Timing Role: Parallel-connected transient voltage suppressor placed directly at connector entry point to clamp surges before reaching interface IC. Use Value: Clamps 1 kV IEC 61000-4-2 contact discharge to ≤7.3 V, preserving data integrity and preventing latch-up in 3.3 V logic-level transceivers. | Use Scenario: Safeguarding LIN bus pins and sensor input lines in door modules and lighting controllers exposed to load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS mounted on each LIN signal line to absorb negative-going spikes while maintaining DC bias stability. Use Value: Withstands 100 A surge (10 ms) and maintains <200 µA leakage at 3.3 V, ensuring low-power sleep mode compliance and long-term reliability. |
| Consumer USB Port Protection | Medical Sensor Signal Conditioning |
Use Scenario: Shielding USB 2.0 data lines (D+/D−) on portable diagnostic devices from user-handling ESD and hot-plug transients. IC Role / Device Role / Timing Role: Low-capacitance TVS placed adjacent to USB connector to minimize signal distortion while providing fast clamping. Use Value: 5200 pF capacitance limits use to full-speed (12 Mbps) USB only; clamps 8 kV contact ESD to <7.3 V within <1 ns, preventing PHY damage. | Use Scenario: Protecting analog front-end inputs of patient-monitoring EEG/ECG amplifiers from electrostatic discharge during clinical handling. IC Role / Device Role / Timing Role: Standoff-rated TVS on sensor input traces to prevent overvoltage-induced op-amp saturation or ADC input damage. Use Value: 3.3 V stand-off allows integration with low-voltage precision analog rails; 7.3 V clamping prevents excursion beyond amplifier's absolute maximum input rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ3V3A | Higher clamping voltage (11.2 V @ 1 A), lower capacitance (450 pF), same SMB package | Better for high-speed lines (e.g., Ethernet PHY), less suitable for strict 3.3 V rail protection | Select when signal integrity > clamping tightness; avoid if protected IC has <8 V abs max rating |
| P6SMB3V3A | Same 3.3 V stand-off, higher PPP (600 W), but slower response (>5 ns), larger leakage (≤500 µA) | Acceptable for power-line surge suppression, not recommended for fast digital I/O | Prefer for cost-sensitive industrial power inputs; not for ESD-critical data lines |
Compared with SMAJ3V3A and P6SMB3V3A, SMLVT3V3 offers the tightest clamping (7.3 V) and lowest leakage (≤200 µA) among SMB-packaged 3.3 V TVS diodes, making it optimal for protecting sensitive 3.3 V logic where voltage margin is constrained.
Availability
SMLVT3V3 is available at Aetrix Electronics and suitable for industrial serial interface protection, automotive body control module I/O, consumer USB port protection, and medical sensor signal conditioning requiring stable component supply across multi-year production cycles.
Supply support for SMLVT3V3 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, MCU, power, and protection devices for industrial, automotive, and consumer markets.
The Transil™ TVS product line targets board-level ESD and surge protection, with SMLVT3V3 optimized specifically for low-voltage (≤3.3 V) digital and mixed-signal interfaces demanding precise clamping and minimal leakage.
FAQ
What is the maximum allowable reverse working voltage for SMLVT3V3?
The maximum continuous reverse working voltage (stand-off voltage) is 3.3 V, meaning it can be reliably held at up to 3.3 V DC without significant leakage or premature breakdown. Operation above this voltage risks exceeding the specified 200 µA leakage limit and may trigger clamping during normal operation.
Can SMLVT3V3 be used for bidirectional transient protection?
No - SMLVT3V3 is a unidirectional TVS diode, designed only for clamping positive transients relative to ground. For bidirectional protection (e.g., AC-coupled lines or symmetric signals), a dedicated bidirectional part like SMLVT3V3C or SMAJ3V3CA must be selected instead.
How does the 5200 pF junction capacitance affect circuit performance?
The 5200 pF capacitance at 0 V introduces measurable loading on high-impedance or high-frequency nodes. It is acceptable for low-speed interfaces (UART, I²C, LIN) but degrades signal rise/fall times and causes attenuation on lines operating above ~1 MHz; USB 2.0 or CAN FD require lower-capacitance alternatives.
Is the SMB package of SMLVT3V3 compatible with standard reflow profiles?
Yes - the SMB package is rated for lead-free reflow with a maximum soldering temperature of 260 °C for 10 seconds. Its JEDEC DO-214AA outline and recommended pad layout (per Figure 11) ensure reliable wetting and mechanical strength under IPC-A-610 Class 2/3 conditions.
SMLVT3V3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AA, SMB
- Series:
- SMLV, TRANSIL™
- 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:
- -25°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
SMLVT3V3 FAQ
1.How can I place an order for SMLVT3V3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMLVT3V3 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 SMLVT3V3 reliable?
The price and inventory of SMLVT3V3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMLVT3V3 is usually 5 days.
3.What payment methods are accepted for SMLVT3V3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMLVT3V3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMLVT3V3?
SMLVT3V3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMLVT3V3 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 SMLVT3V3?
For technical support, including SMLVT3V3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMLVT3V3 requirements.
6.How does Aetrix verify that SMLVT3V3 is sourced from the original manufacturer or authorized distributors?
All SMLVT3V3 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 SMLVT3V3 meets industry standards.
7.What is the process for return or replacement of SMLVT3V3?
All SMLVT3V3 units undergo pre-shipment inspection (PSI). If there is an issue with SMLVT3V3, 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 SMLVT3V3 part is unused and in its original packaging.
Return procedure for SMLVT3V3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMLVT3V3 Tags
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