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STMicroelectronics SM2T3V3A
- Part No.:
- SM2T3V3A
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-216AA
- Datasheet:
-
SM2T3V3A.pdf
- Description:
- TVS DIODE 3.3VWM 6.8VC DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,279
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Product details
Overview
SM2T3V3A from STMicroelectronics is a unidirectional Transil™ TVS diode in DO-216AA (STmite) package, designed for ESD and EOS protection in low-voltage portable electronics. It features 3.3 V stand-off voltage, 6.5 A peak pulse current (10/1000 µs), 6.8 V max clamping voltage at 6.5 A, and 200 W peak pulse power dissipation.
For engineers reviewing the SM2T3V3A datasheet, SM2T3V3A pinout, SM2T3V3A application, or SM2T3V3A equivalent, key selection criteria include clamping ratio (VCL/VBR ≈ 1.89), low leakage (<500 µA @ 3.3 V), fast response time, thermal resistance (Rth(j-l) = 20 °C/W), and compatibility with miniaturized PCB footprints per Figure 3.
Technical Context
The SM2T3V3A operates as a voltage-clamping transient suppressor using avalanche breakdown. Its 3.3 V stand-off voltage enables protection of 3.3 V logic rails, while its 6.8 V clamping voltage at 6.5 A ensures safe overvoltage limiting during IEC 61000-4-2 ESD events.
It exhibits a negative voltage temperature coefficient (αT = −5.3 × 10⁻⁴ /°C), meaning breakdown voltage decreases slightly with rising junction temperature. Junction-to-lead thermal resistance is 20 °C/W, supporting reliable power dissipation in compact layouts without heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 3.3 V - Maximum continuous reverse working voltage before conduction begins; matches 3.3 V I/O rail systems. |
| Breakdown Voltage (VBR min) | 3.6 V @ 1 mA - Avalanche onset threshold; ensures reliable triggering before system damage. |
| Clamping Voltage (VCL max) | 6.8 V @ 6.5 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge. |
| Peak Pulse Power (PPP) | 200 W (10/1000 µs) - Sustains high-energy transients typical of IEC 61000-4-2 Level 4 ESD. |
| Leakage Current (IRM max) | 500 µA @ 3.3 V - Low standby loss critical for battery-powered devices. |
| Junction-to-Lead Rth | 20 °C/W - Enables effective heat transfer to PCB copper, supporting 2.5 W steady-state dissipation. |
| Capacitance (C max) | 2500 pF @ 0 V, 1 MHz - Measured junction capacitance; impacts high-speed signal integrity on data lines. |
Pinout & Package
DO-216AA (STmite) surface-mount package with cathode band marking; epoxy meets UL94 V0; RoHS-compliant ECOPACK® grade available.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink path during clamping | Connected to protected line (e.g., USB D+, HDMI TX); conducts surge current to ground when V > VBR. |
| Cathode | Reference terminal / clamping reference node | Connected to system ground; defines clamping voltage relative to GND; marked by band on package. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping architecture | Protects only against negative transients on grounded-cathode configuration; avoids forward conduction during normal operation. |
| Low clamping factor (VCL/VBR) | ≈1.89 - Minimizes overvoltage stress on downstream ICs compared to higher-ratio TVS devices. |
| Fast response time | <1 ns - Activates before ESD pulse edge propagates into sensitive circuitry. |
| Miniaturized STmite footprint | 1.9 mm × 1.9 mm × 3.75 mm - Enables placement adjacent to connectors on space-constrained mobile PCBs. |
| ECOPACK® environmental compliance | Meets RoHS, halogen-free, and UL94 V0 flammability requirements for consumer and industrial end equipment. |
Applications
| USB 2.0 Data Lines | HDMI Interface Protection |
|---|---|
Use Scenario: ESD discharge events at USB Type-A/B connectors during hot-plug insertion. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between D+ and GND, clamping transients before they reach USB transceiver. Use Value: Limits voltage to ≤6.8 V during 8 kV contact discharge, preserving signal integrity and preventing PHY latch-up. | Use Scenario: Electrostatic discharge on HDMI source port (e.g., laptop output) during cable mating. IC Role / Device Role / Timing Role: Standoff-rated protection on TMDS clock/data pairs referenced to chassis ground. Use Value: Maintains 3.3 V DC bias while suppressing ±15 kV air discharge per IEC 61000-4-2, avoiding pixel corruption or link drop. |
| Smartphone Button Inputs | Industrial Sensor I/O |
Use Scenario: Human-body-model ESD on mechanical power/volume buttons connected to baseband processor GPIOs. IC Role / Device Role / Timing Role: Low-leakage (500 µA) clamping device on 3.3 V input pins with internal pull-up. Use Value: Prevents false button presses and GPIO latch-up without loading the weak pull-up resistor network. | Use Scenario: Inductive switching transients on 4–20 mA loop sensor outputs in factory automation cabinets. IC Role / Device Role / Timing Role: Reverse-biased protection on analog output line referenced to local ground plane. Use Value: Clamps 200 W surges without degrading 12-bit DAC accuracy or introducing offset drift due to leakage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ3.3A | DO-214AC package; higher Rth(j-a) = 40 °C/W; VBR = 3.68 V min; VCL = 7.5 V @ 6.5 A | Larger footprint (4.5 mm × 2.7 mm); less suitable for ultra-compact designs | Preferred where board space allows and higher clamping margin is acceptable. |
| P6SMB3.3A | DO-214AA package; 600 W PPP rating; VCL = 9.2 V @ 15 A; C = 1500 pF | Higher power handling but looser clamping; lower capacitance benefits high-speed lines | Chosen when surge energy exceeds 200 W but signal bandwidth demands lower capacitance. |
Compared with SMAJ3.3A and P6SMB3.3A, the SM2T3V3A delivers superior space efficiency and tighter clamping (6.8 V vs. ≥7.5 V) for 3.3 V rail protection, though with lower single-pulse energy headroom than P6SMB3.3A.
Availability
SM2T3V3A is available at Aetrix Electronics and suitable for USB interface protection, HDMI port hardening, smartphone button ESD suppression, and industrial 4–20 mA sensor I/O requiring stable component supply across production lifecycles.
Supply support for SM2T3V3A 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, specializing in automotive, industrial, and power discrete solutions with strong IP in protection devices and analog ICs.
The Transil™ TVS diode product line targets robust, low-footprint overvoltage protection for portable, consumer, and industrial electronics subject to IEC 61000-4-2 and ISO 10605 threats.
FAQ
What is the maximum operating junction temperature for SM2T3V3A?
The SM2T3V3A has a maximum operating junction temperature (Tj) of 150 °C, validated under steady-state conditions with 2.5 W dissipation on an infinite heatsink at Tamb = 100 °C. This rating supports reliable operation in thermally constrained handheld enclosures.
Does SM2T3V3A meet IEC 61000-4-2 Level 4 ESD requirements?
Yes - with a 6.8 V clamping voltage at 6.5 A (10/1000 µs), the SM2T3V3A limits transient voltage well below the 8–12 V failure thresholds of most 3.3 V logic interfaces during 8 kV contact / 15 kV air discharge testing per IEC 61000-4-2.
Can SM2T3V3A be used in bidirectional configurations?
No - the SM2T3V3A is strictly unidirectional. Its cathode-band-marked DO-216AA package and electrical specs (e.g., VBR defined only in reverse) confirm it is intended for grounded-cathode, single-polarity clamping. For bidirectional protection, ST recommends SMBJ3.3CA or similar dual-diode arrays.
What is the recommended PCB pad layout for optimal thermal performance?
ST specifies a footprint per Figure 3 in DocID11738 Rev 3: 1.82 mm × 1.82 mm solder pads with 0.75 mm spacing, using minimum 1 oz copper and thermal vias to inner ground planes. This achieves Rth(j-a) = 250 °C/W and supports full 2.5 W steady-state dissipation.
SM2T3V3A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-216AA
- Series:
- SM2T, TRANSIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 3.3V
- Voltage - Breakdown (Min):
- 3.6V
- Voltage - Clamping (Max) @ Ipp:
- 6.8V
- Current - Peak Pulse (10/1000µs):
- 30A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 2500pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-216AA
SM2T3V3A FAQ
1.How can I place an order for SM2T3V3A through Aetrix?
Please submit a Request for Quotation (RFQ) for SM2T3V3A 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 SM2T3V3A reliable?
The price and inventory of SM2T3V3A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM2T3V3A is usually 5 days.
3.What payment methods are accepted for SM2T3V3A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM2T3V3A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM2T3V3A?
SM2T3V3A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM2T3V3A 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 SM2T3V3A?
For technical support, including SM2T3V3A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM2T3V3A requirements.
6.How does Aetrix verify that SM2T3V3A is sourced from the original manufacturer or authorized distributors?
All SM2T3V3A 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 SM2T3V3A meets industry standards.
7.What is the process for return or replacement of SM2T3V3A?
All SM2T3V3A units undergo pre-shipment inspection (PSI). If there is an issue with SM2T3V3A, 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 SM2T3V3A part is unused and in its original packaging.
Return procedure for SM2T3V3A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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