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STMicroelectronics SM2T6V8A
- Part No.:
- SM2T6V8A
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-216AA
- Datasheet:
-
SM2T6V8A.pdf
- Description:
- TVS DIODE 5VWM 9.2VC DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:29,133
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Product details
Overview
SM2T6V8A from STMicroelectronics is a unidirectional Transil™ TVS diode designed for ESD and transient overvoltage protection in portable electronics. It features a 6.4 V breakdown voltage (VBR), 9.2 V clamping voltage (VCL) at 19.6 A peak pulse current, 200 W peak pulse power (10/1000 µs), and 1.0 mm height in JEDEC DO-216AA (STmite) package - used in USB data lines and battery charging circuits.
For engineers reviewing the SM2T6V8A datasheet, SM2T6V8A pinout, SM2T6V8A application, or SM2T6V8A equivalent, key selection criteria include clamping ratio (VCL/VBR = 1.44), low leakage (50 µA @ 5 V), junction capacitance (1600 pF @ 0 V), thermal resistance (250 °C/W on PCB), and compatibility with automated SMT assembly.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: it remains high-impedance below 6.4 V (VBR min), then rapidly avalanches to clamp transients up to 9.2 V at 19.6 A. Its 1600 pF junction capacitance limits use to sub-MHz signal paths like DC power rails and low-speed I/O.
The DO-216AA (STmite) package enables 1.0 mm profile and pick-and-place compatibility, while thermal resistance of 250 °C/W (junction-to-ambient, PCB layout dependent) defines safe power derating above 25°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 5 V - Maximum continuous reverse voltage before leakage exceeds 50 µA; sets operating margin below breakdown. |
| Breakdown Voltage (VBR) | 6.4 V min @ 1 mA - Confirmed avalanche initiation threshold; ensures reliable triggering during ESD events. |
| Clamping Voltage (VCL) | 9.2 V max @ 19.6 A - Peak voltage seen by protected circuit during 10/1000 µs surge; determines IC survival margin. |
| Peak Pulse Power (PPP) | 200 W @ 10/1000 µs - Sustained transient energy handling capability under standard lightning surge waveform. |
| Junction Capacitance (Cj) | 1600 pF @ 0 V - Limits high-frequency signal integrity; suitable for DC/low-speed lines, not USB 2.0+ or HDMI. |
| Leakage Current (IRM) | 50 µA @ 5 V - Low standby power loss; avoids battery drain in always-on portable systems. |
| Package | DO-216AA (STmite) - 1.0 mm height, 2.67 × 1.27 mm footprint; optimized for space-constrained mobile PCBs. |
Pinout & Package
DO-216AA (STmite) surface-mount package: cathode-marked single-terminal device with anode and cathode leads formed into gull-wing configuration; 1.0 mm maximum overall height; compatible with IPC-7351B SO-23 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during clamping | Connected to protected line (e.g., VBUS); conducts surge current to ground when V > VBR. |
| Cathode | Current exit / reference node | Connected to system ground; establishes reference for clamping action and defines polarity (unidirectional). |
Key Features
| Feature | Design Value |
|---|---|
| Clamping ratio (VCL/VBR) | 1.44 - Low ratio minimizes overvoltage stress on downstream ICs during ESD events. |
| Response time | < 1 ns - Enables effective suppression of fast-rising ESD pulses (IEC 61000-4-2 Level 4). |
| Solder joint inspectability | Visible gull-wing leads - Supports AOI and X-ray inspection without requiring special lighting or angle adjustment. |
| ESD robustness | ±15 kV air, ±8 kV contact (IEC 61000-4-2) - Validated performance for handheld device interfaces. |
| Thermal resistance (Rth j-a) | 250 °C/W - Enables predictable derating on standard FR4 PCBs with recommended copper pad layout. |
Applications
| USB Power Input Protection | Smartphone Battery Charging Circuit |
|---|---|
Use Scenario: Protecting 5 V VBUS line from hot-plug surges and ESD during USB cable insertion. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VBUS and GND, triggered within 1 ns to clamp transients below 9.2 V. Use Value: Prevents damage to USB controller and PMIC by limiting surge voltage to safe level while maintaining 5 V nominal operation. | Use Scenario: Safeguarding lithium-ion battery charge path against load-dump and adapter transient spikes. IC Role / Device Role / Timing Role: Standoff-rated TVS (5 V VRM) placed at charger IC input, absorbing 200 W surges without degradation. Use Value: Ensures battery management IC survives repeated 10/1000 µs surges up to 19.6 A, extending field reliability. |
| Portable Medical Sensor Interface | Wireless Headset Audio Line |
Use Scenario: Shielding analog sensor supply rail (3.3–5 V) from ESD during clinical handling. IC Role / Device Role / Timing Role: Low-leakage (50 µA) TVS connected to sensor VDD, preserving microamp-level bias currents. Use Value: Maintains sensor accuracy and low-power sleep mode integrity while passing IEC 61000-4-2 testing. | Use Scenario: Suppressing ESD on mono audio output line exposed to user touch in compact earbud housing. IC Role / Device Role / Timing Role: Compact DO-216AA device mounted directly at jack connector, leveraging 1.0 mm height for thin form factor. Use Value: Eliminates pop/click artifacts and prevents amplifier latch-up during human-body-model discharges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.8A | DO-214AC package (2.7 mm height); 6.8 V VBR; 11.2 V VCL @ 17.3 A; 400 W PPP (10/1000 µs) | Higher clamping voltage (+2.0 V) and taller profile - less suitable for ultra-thin devices | Choose when higher surge rating is required and board height allows ≥2.7 mm |
| P6SMB6.8A | DO-214AA package (2.2 mm height); 6.8 V VBR; 10.5 V VCL @ 21.4 A; 600 W PPP (10/1000 µs) | Higher power rating but larger footprint (4.5 × 3.3 mm) - incompatible with dense portable layouts | Prefer for industrial power rails where space and height are less constrained |
Compared with SMAJ6.8A and P6SMB6.8A, SM2T6V8A offers the lowest profile (1.0 mm) and tightest clamping ratio (1.44), making it optimal for space-limited consumer electronics - though with lower absolute surge power handling than its DO-214 alternatives.
Availability
SM2T6V8A is available at Aetrix Electronics and suitable for USB power input protection, smartphone battery charging circuits, portable medical sensor interfaces, and wireless headset audio lines requiring stable component supply across high-volume production cycles.
Supply support for SM2T6V8A 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, designing and manufacturing analog, MCU, power, and protection devices for automotive, industrial, and consumer markets.
The SM2T series belongs to ST's Transil™ TVS portfolio, engineered specifically for miniaturized portable electronics requiring ultra-low-profile, high-reliability ESD and surge protection.
FAQ
What is the maximum clamping voltage of SM2T6V8A under IEC 61000-4-5 8/20 µs surge?
Per STMicroelectronics datasheet Rev. 3, SM2T6V8A delivers 1000 W peak pulse power under 8/20 µs waveform, with clamping voltage specified at 10.5 V max at 30 A. This value is measured per IEC 61000-4-5 test conditions and reflects worst-case transient suppression performance.
Can SM2T6V8A be used in bidirectional signal lines such as RS-485?
No - SM2T6V8A is a unidirectional TVS diode, rated only for positive transients relative to ground. Bidirectional protection requires symmetrical devices like SM2T6V8C or dedicated dual-rail arrays; using this part on AC-coupled or differential lines risks forward conduction and failure.
How does the 1600 pF junction capacitance affect USB 2.0 data line protection?
At 1600 pF, SM2T6V8A introduces excessive signal distortion on USB 2.0 D+/D− lines (480 Mbps), violating eye diagram and jitter specifications. It is unsuitable for high-speed data lines; low-capacitance alternatives (<5 pF) such as ESDALC6V1-1U2 are required instead.
Is the DO-216AA (STmite) package lead-free and RoHS-compliant?
Yes - STMicroelectronics confirms SM2T6V8A meets RoHS Directive 2011/65/EU and is manufactured with lead-free terminations. The device carries the "E3" marking per JEDEC J-STD-609, indicating SnAgCu (SAC305) solder finish and full compliance with exemption 7a.
SM2T6V8A 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):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9.2V
- Current - Peak Pulse (10/1000µs):
- 19.6A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-216AA
SM2T6V8A FAQ
1.How can I place an order for SM2T6V8A through Aetrix?
Please submit a Request for Quotation (RFQ) for SM2T6V8A 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 SM2T6V8A reliable?
The price and inventory of SM2T6V8A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM2T6V8A is usually 5 days.
3.What payment methods are accepted for SM2T6V8A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM2T6V8A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM2T6V8A?
SM2T6V8A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM2T6V8A 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 SM2T6V8A?
For technical support, including SM2T6V8A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM2T6V8A requirements.
6.How does Aetrix verify that SM2T6V8A is sourced from the original manufacturer or authorized distributors?
All SM2T6V8A 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 SM2T6V8A meets industry standards.
7.What is the process for return or replacement of SM2T6V8A?
All SM2T6V8A units undergo pre-shipment inspection (PSI). If there is an issue with SM2T6V8A, 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 SM2T6V8A part is unused and in its original packaging.
Return procedure for SM2T6V8A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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