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onsemi P6SMB12AT3
- Part No.:
- P6SMB12AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB12AT3.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:9,820
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Product details
Overview
P6SMB12AT3 from ON Semiconductor is a unidirectional 600 W transient voltage suppressor (TVS) diode designed for parallel overvoltage protection of DC power rails and signal lines. It features a 10.2 V working peak reverse voltage (VRWM), 12 V nominal Zener breakdown voltage (VBR) at 1 mA test current, and clamps to ≤16.7 V at 36 A peak pulse current (IPP), making it suitable for automotive power supply surge suppression and industrial I/O port protection.
For engineers reviewing the P6SMB12AT3 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin above operating voltage, clamping voltage vs. protected device's absolute maximum rating, thermal derating at elevated ambient temperatures, and UL 497B recognition for isolated loop circuit compliance.
Technical Context
The P6SMB12AT3 operates as a silicon avalanche diode with fast <1 ns response time and low dynamic impedance, enabling effective suppression of ESD (≥16 kV HBM) and lightning-induced transients (10/1000 µs waveform). Its unidirectional configuration provides reverse-biased clamping only, requiring correct polarity placement across protected nodes.
Thermal performance is defined by junction-to-lead resistance of 40 °C/W and 3.0 W DC power dissipation at 75 °C lead temperature, with linear derating above that point. The device uses ON Semiconductor's SURMETIC® SMB package - void-free thermoset plastic with modified L-bend leads and cathode band polarity marking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 10.2 V - Maximum continuous reverse operating voltage before significant leakage; must exceed system DC rail voltage (e.g., 9–10 V nominal 12 V systems) |
| VBR @ IT = 1 mA | 11.4–12.6 V - Zener breakdown range defining turn-on threshold; ensures reliable conduction onset during overvoltage events |
| VC @ IPP = 36 A | ≤16.7 V - Clamped voltage under 10/1000 µs surge; must stay below protected IC's absolute maximum input rating |
| PPK | 600 W - Peak pulse power handling capability at 1 ms pulse width; supports high-energy transients per IEC 61000-4-5 Level 4 |
| IR @ VRWM | ≤5 µA - Reverse leakage current at rated working voltage; ensures minimal standby power loss in always-on circuits |
| Response Time | <1 ns - Time to enter avalanche conduction after transient onset; critical for protecting high-speed interfaces against ESD |
| UL Recognition | UL 497B QVGQ2 - Certified for isolated loop circuit protection; validates reliability in telecom and industrial safety-critical applications |
Pinout & Package
The P6SMB12AT3 is housed in an SMB (DO-214AA) surface-mount package (Case 403A), featuring a cathode-indicated polarity band and modified L-bend leads for enhanced solder joint reliability. Package dimensions: 4.32 mm × 3.56 mm × 2.13 mm (L × W × H), with 2.03 mm lead width and 0.23 mm lead thickness.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or lowest potential in clamping configuration; forms return path for surge current |
| Cathode | High-side transient sensing node | Connected to protected line (e.g., +12 V rail); avalanche conduction initiates when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Withstands 10/1000 µs surges up to 36 A without degradation - sufficient for IEC 61000-4-5 Level 4 (4 kV line-to-ground) |
| UL 497B certification | Validated for isolated loop protection including strike voltage breakdown, endurance conditioning, and dielectric withstand tests |
| ESD robustness | Class 3 (>16 kV) per Human Body Model - protects against common handling and system-level ESD events |
| Low clamping ratio | VC/VBR ≈ 1.39 (16.7 V / 12 V) - minimizes voltage overshoot during clamping, reducing stress on downstream components |
| Pb-free SURMETIC® package | RoHS-compliant SMB molding with corrosion-resistant finish and 260 °C solderability - compatible with standard reflow profiles |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Suppressing load dump and jump-start transients on 12 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and local regulator input to clamp spikes before they reach LDOs or microcontrollers. Use Value: Limits voltage to ≤16.7 V during 36 A surges, preventing damage to 16 V-rated regulators and ensuring system reset integrity. |
Use Scenario: Protecting 24 V digital input channels in programmable logic controllers against field-wiring induced surges. IC Role / Device Role / Timing Role: Parallel-connected TVS on each optocoupler input side to shunt transients before isolation barrier. Use Value: UL 497B recognition confirms suitability for isolated loop circuits, meeting industrial safety standards for field-side protection. |
| Medical Equipment Power Supply | Telecom Line Interface Protection |
Use Scenario: Safeguarding auxiliary 12 V supplies in diagnostic imaging devices from ESD and switching noise. IC Role / Device Role / Timing Role: TVS mounted directly at power entry connector to intercept fast transients before bulk capacitance. Use Value: Sub-1 ns response ensures clamping occurs before sensitive analog front-end ICs experience overvoltage stress. |
Use Scenario: Protecting RS-485 transceivers and modem line drivers connected to external wiring harnesses. IC Role / Device Role / Timing Role: Unidirectional TVS on VCC and signal lines to absorb induced surges from nearby AC mains or lightning coupling. Use Value: 600 W rating handles repetitive surges in outdoor telecom cabinets while maintaining low leakage (<5 µA) to avoid signal distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A | Same SMB package, identical VRWM (10.2 V) and VC (16.7 V), but rated for 600 W with 100 A IFSM vs. 100 A for P6SMB12AT3; tighter VBR tolerance (11.4–12.6 V vs. 11.4–12.6 V) | No functional difference in clamping behavior; both UL 497B recognized and HBM ESD rated | Select SMBJ12A if sourcing from manufacturers emphasizing JEDEC-standardized SMBJ series nomenclature and broader second-source availability |
| 1.5SMC12A | Larger SMC (DO-214AB) package (7.11 mm × 6.22 mm), same electrical specs (VRWM = 10.2 V, VC = 16.7 V), higher thermal mass (RJA = 19°C/W vs. 226°C/W) | Better sustained power handling due to lower thermal resistance; requires larger PCB footprint and different layout | Choose 1.5SMC12A when board space permits and long-duration surge immunity (e.g., >100 ms) is prioritized over compactness |
Compared with SMBJ12A and 1.5SMC12A, the P6SMB12AT3 offers identical electrical protection performance in the smallest SMB footprint, optimized for high-density automotive and industrial PCBs where UL 497B compliance and Pb-free assembly are mandatory.
Availability
P6SMB12AT3 is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, and medical power supplies requiring stable component supply with full traceability and lifecycle management.
Supply support for P6SMB12AT3 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
ON Semiconductor is a global semiconductor manufacturer specializing in power management, analog, sensor, and discrete solutions for automotive, industrial, and communications markets.
The P6SMB12AT3 belongs to ON Semiconductor's P6SMBxxAT3 series of 600 W unidirectional TVS diodes, engineered specifically for robust, standards-compliant overvoltage protection in harsh electromagnetic environments.
FAQ
What is the working peak reverse voltage (VRWM) of the P6SMB12AT3?
The P6SMB12AT3 has a VRWM of 10.2 V, meaning it can continuously block up to this voltage in reverse bias without significant leakage. This value is selected to provide margin above typical 9–10 V nominal 12 V systems while ensuring reliable clamping onset before protected components exceed their absolute maximum ratings. The P6SMB12AT3 maintains <5 µA leakage at this voltage.
How does the P6SMB12AT3 compare to bidirectional TVS diodes like P6SMB12CAT3?
The P6SMB12AT3 is unidirectional and clamps only in reverse bias, whereas P6SMB12CAT3 is bidirectional and clamps symmetrically for AC or dual-polarity signals. The P6SMB12AT3 offers lower capacitance and tighter VBR control for DC rail protection, while P6SMB12CAT3 suits RS-485 or audio line applications. Pinout and package are identical, but polarity orientation differs.
Is the P6SMB12AT3 RoHS compliant and lead-free?
Yes, the "G" suffix in P6SMB12AT3G explicitly denotes ON Semiconductor's Pb-free SURMETIC® package. The P6SMB12AT3 meets RoHS Directive 2011/65/EU requirements and is qualified for reflow soldering at 260 °C for 10 seconds, with corrosion-resistant finishes and readily solderable leads.
What is the maximum clamping voltage (VC) of the P6SMB12AT3 under surge conditions?
The P6SMB12AT3 clamps to a maximum of 16.7 V at its rated peak pulse current of 36 A (10/1000 µs waveform). This VC value is guaranteed across temperature and lot variations, and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring compatibility with 16 V-rated downstream ICs.
Does the P6SMB12AT3 require any external components for basic operation?
No, the P6SMB12AT3 functions as a standalone two-terminal device and requires no external biasing, resistors, or capacitors for transient suppression. It is connected in parallel across the node to be protected, with cathode to the higher-potential line and anode to ground or reference. Layout best practices - short traces and proximity to protected IC - maximize effectiveness of the P6SMB12AT3.
P6SMB12AT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 36A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 1435pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
P6SMB12AT3 FAQ
1.How can I place an order for P6SMB12AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB12AT3 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 P6SMB12AT3 reliable?
The price and inventory of P6SMB12AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB12AT3 is usually 5 days.
3.What payment methods are accepted for P6SMB12AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB12AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB12AT3?
P6SMB12AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB12AT3 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 P6SMB12AT3?
For technical support, including P6SMB12AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB12AT3 requirements.
6.How does Aetrix verify that P6SMB12AT3 is sourced from the original manufacturer or authorized distributors?
All P6SMB12AT3 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 P6SMB12AT3 meets industry standards.
7.What is the process for return or replacement of P6SMB12AT3?
All P6SMB12AT3 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB12AT3, 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 P6SMB12AT3 part is unused and in its original packaging.
Return procedure for P6SMB12AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB12AT3 Tags
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