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onsemi P6SMB12AT3G
- Part No.:
- P6SMB12AT3G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB12AT3G.pdf
- Description:
- TVS DIODE 10.2V 16.7V 425TEPBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,286
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Product details
Overview
P6SMB12AT3G from ON Semiconductor is a unidirectional 600 W transient voltage suppressor (TVS) diode designed for overvoltage protection in DC power rails and signal lines. It features a 10.2 V working peak reverse voltage (VRWM), 12 V nominal Zener breakdown voltage (VBR), clamps transients to ≤16.7 V at 36 A peak pulse current (IPP), and responds in <1 ns. It is widely used in automotive power supply inputs and industrial I/O interface protection.
For engineers reviewing the P6SMB12AT3G datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin above operating voltage, clamping voltage vs. protected device's absolute maximum rating, surge current capability under 10/1000 µs waveform, and UL 497B recognition for isolated loop circuit compliance.
Technical Context
The P6SMB12AT3G operates as a unidirectional Zener-based TVS, leveraging avalanche breakdown to clamp fast transients. Its low zener impedance (<1 Ω typical) and sub-nanosecond response ensure minimal overshoot during ESD or lightning-induced surges. The device is rated for 600 W peak power (10/1000 µs waveform) and supports 100 A non-repetitive forward surge current (8.3 ms half-sine).
Thermal design relies on junction-to-lead resistance of 40 °C/W and junction-to-ambient resistance of 226 °C/W (FR-4 board, minimum footprint). It is Pb-free, RoHS-compliant, AEC-Q101 qualified, and UL 497B recognized for isolated loop protection - critical for automotive and industrial safety-critical interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 10.2 V - Maximum continuous reverse voltage before clamping begins; must exceed system's max DC operating voltage. |
| VBR @ IT = 1 A | 11.4–12.6 V - Breakdown occurs within this range at 1 A test current; defines turn-on threshold tolerance. |
| VC @ IPP = 36 A | ≤16.7 V - Clamped voltage during 10/1000 µs surge; must stay below protected IC's absolute max rating. |
| IPP | 36 A - Peak pulse current it safely handles per standard 10/1000 µs waveform. |
| IR @ VRWM | ≤5 µA - Reverse leakage at 10.2 V; ensures negligible standby power loss in high-impedance circuits. |
| Response Time | <1 ns - Enables suppression of fast ESD events (IEC 61000-4-2) before downstream damage occurs. |
| ESD Rating | Class 3 (>16 kV HBM) - Validated for robust handling of human-body-model electrostatic discharge. |
| UL Recognition | UL 497B (QVGQ2 File #E210057) - Certified for use in isolated loop telecom and industrial protection circuits. |
Pinout & Package
Package: SMB (Case 403A), surface-mount, void-free thermosetting plastic with modified L-bend leads and cathode polarity band. Dimensions: 3.56 mm × 4.32 mm × 2.30 mm (L × W × H); weight ≈ 0.09 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction or surge clamping | Connected to ground or low-side reference; forms return path for transient current. |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to protected line (e.g., 12 V rail); conducts avalanche current when voltage exceeds VRWM. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W Peak Pulse Power | Handles high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a in automotive) without failure. |
| Low Clamping Ratio (VC/VBR ≈ 1.47) | Minimizes overvoltage stress on downstream components compared to higher-ratio TVS devices. |
| AEC-Q101 Qualified | Validated for automotive underhood and chassis applications with temperature cycling, humidity, and mechanical shock testing. |
| UL 497B Recognition | Approved for use in safety-critical isolated loop circuits (e.g., 4–20 mA sensor loops, PoE interfaces). |
| Pb-Free & RoHS Compliant | Meets global environmental regulations and supports lead-free reflow soldering up to 260°C for 10 s. |
Applications
| Automotive Power Input Protection | Industrial 4–20 mA Loop Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges >35 V. Use Value: Limits voltage to ≤16.7 V at 36 A, preventing damage to voltage regulators and microcontrollers rated for 16 V absolute max. | Use Scenario: Safeguarding analog input stages of PLC analog I/O modules connected to field transmitters. IC Role / Device Role / Timing Role: Bidirectional protection not required; unidirectional P6SMB12AT3G guards against positive-going transients on the loop supply side. Use Value: UL 497B certification ensures compliance with isolated loop safety standards, eliminating need for additional barrier validation. |
| DC Power Supply Output Clamping | RS-485 Transceiver Line Protection |
Use Scenario: Secondary-side overvoltage suppression on 12 V SMPS outputs feeding sensitive logic circuits. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing output capacitor discharge energy during short-circuit recovery. Use Value: 600 W peak power rating sustains multiple 10/1000 µs surges without degradation, ensuring long-term reliability in 24/7 operation. | Use Scenario: Protecting RS-485 transceiver bus pins (A/B) from ESD and cable discharge events in factory automation networks. IC Role / Device Role / Timing Role: Placed between each bus line and ground; leverages <1 ns response to suppress fast ESD pulses before transceiver latch-up. Use Value: 16 kV HBM ESD rating exceeds IEC 61000-4-2 Level 4 (8 kV contact), reducing field failure rates in harsh EMI environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | 400 W peak power; 12 V VBR; 27.7 V VC @ 22.5 A; SMA package (smaller footprint, lower thermal mass) | Limited to lower-energy transients; less suitable for automotive load dump where 600 W is mandated. | Select P6SMB12AT3G when 600 W surge handling and UL 497B certification are required. |
| 1.5SMC12A | 1500 W peak power; same 12 V VBR; 19.9 V VC @ 75.4 A; larger SMC package (7.11 mm × 6.22 mm) | Over-spec'd for many 12 V systems; requires more PCB area and higher cost; better for extreme surge environments. | Choose P6SMB12AT3G for optimal balance of surge rating, size, and cost in space-constrained 12 V designs. |
Compared with SMAJ12A and 1.5SMC12A, P6SMB12AT3G delivers certified 600 W clamping performance in a compact SMB package with UL 497B recognition - making it the preferred choice for automotive and industrial 12 V protection where regulatory compliance and board space are both critical.
Availability
P6SMB12AT3G is available at Aetrix Electronics and suitable for automotive electronics, industrial process controllers, and medical power supply designs requiring stable component supply and long-term lifecycle assurance.
Supply support for P6SMB12AT3G 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, sensors, and discrete devices for automotive, industrial, and cloud power applications.
The P6SMB12AT3G belongs to the P6SMBxxAT3G series of unidirectional TVS diodes engineered for high-reliability overvoltage protection in harsh environments - particularly targeting automotive power nets and industrial control interfaces where UL recognition and AEC-Q101 qualification are mandatory.
FAQ
What is the clamping voltage of P6SMB12AT3G at its rated peak pulse current?
The P6SMB12AT3G has a maximum clamping voltage (VC) of 16.7 V when subjected to its rated peak pulse current (IPP) of 36 A under the standard 10/1000 µs waveform. This value is measured per ON Semiconductor's test conditions and ensures predictable overvoltage limiting for downstream 12 V-rated components. The P6SMB12AT3G datasheet specifies this parameter in Table 3 under "VC @ IPP".
Is P6SMB12AT3G suitable for bidirectional transient suppression?
No, P6SMB12AT3G is a unidirectional TVS diode and only clamps positive transients relative to ground. For bidirectional protection (e.g., AC lines or differential buses), ON Semiconductor offers the P6SMB12CAT3G variant. Using P6SMB12AT3G in bidirectional applications risks forward conduction during negative excursions, potentially damaging the device or failing to protect. Always verify polarity requirements before selecting P6SMB12AT3G.
Does P6SMB12AT3G meet automotive qualification standards?
Yes, P6SMB12AT3G is AEC-Q101 qualified and PPAP capable, confirming its suitability for automotive applications including engine control units, body electronics, and infotainment power supplies. This qualification covers stress tests for temperature cycling, humidity, mechanical shock, and high-temperature operating life. The P6SMB12AT3G also carries UL 497B recognition, further supporting its use in automotive isolated subsystems.
What is the maximum reverse leakage current for P6SMB12AT3G at its working voltage?
The maximum reverse leakage current (IR) for P6SMB12AT3G is 5 µA when biased at its working peak reverse voltage (VRWM) of 10.2 V. This low leakage ensures minimal power loss in always-on circuits and avoids false triggering in high-impedance sensing nodes. The value is specified in the Electrical Characteristics table of the P6SMB12AT3G datasheet and tested at TA = 25°C.
Can P6SMB12AT3G be used in place of P6SMB12CAT3G?
No, P6SMB12AT3G cannot replace P6SMB12CAT3G because they differ fundamentally in polarity: P6SMB12AT3G is unidirectional, while P6SMB12CAT3G is bidirectional. Substituting P6SMB12AT3G in a bidirectional application will result in improper clamping during negative transients and possible device failure. Always match the P6SMB12AT3G to unidirectional protection needs and consult the full P6SMBxxAT3G series datasheet before substitution.
P6SMB12AT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- General Purpose
- Capacitance @ Frequency:
- 1435pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
P6SMB12AT3G FAQ
1.How can I place an order for P6SMB12AT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB12AT3G 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 P6SMB12AT3G reliable?
The price and inventory of P6SMB12AT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB12AT3G is usually 5 days.
3.What payment methods are accepted for P6SMB12AT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB12AT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB12AT3G?
P6SMB12AT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB12AT3G 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 P6SMB12AT3G?
For technical support, including P6SMB12AT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB12AT3G requirements.
6.How does Aetrix verify that P6SMB12AT3G is sourced from the original manufacturer or authorized distributors?
All P6SMB12AT3G 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 P6SMB12AT3G meets industry standards.
7.What is the process for return or replacement of P6SMB12AT3G?
All P6SMB12AT3G units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB12AT3G, 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 P6SMB12AT3G part is unused and in its original packaging.
Return procedure for P6SMB12AT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB12AT3G Tags
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