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onsemi P6SMB6.8AT3
- Part No.:
- P6SMB6.8AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- -
- Datasheet:
-
P6SMB6.8AT3.pdf
- Description:
- TVS ZENER UNIDIR 600W 6.8V SMB
- Quantity:
- Payment:
- Shipping:
Inventory:6,575
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Product details
Overview
P6SMB6.8AT3 from ON Semiconductor is a unidirectional 600 W peak power TVS diode designed for transient overvoltage protection in DC power rails and signal lines. It features a 6.8 V nominal Zener breakdown voltage (VBR = 6.8 V @ IT = 10 mA), clamps to ≤10.5 V at 57 A peak pulse current (IPP), and delivers <1 ns response time with <5 µA leakage at 5.8 V working reverse voltage (VRWM). It is widely deployed in automotive power supply inputs and industrial sensor interface circuits.
For engineers reviewing the P6SMB6.8AT3 datasheet, pinout, applications, or equivalent options, key selection criteria include its 6.8 V VBR, 10.5 V clamping voltage at 57 A, UL 497B certification for isolated loop protection, AEC−Q101 qualification, and SMB (Case 403A) surface-mount package compatibility with high-surge industrial environments.
Technical Context
The P6SMB6.8AT3 operates as a unidirectional Zener-based transient voltage suppressor, leveraging avalanche breakdown to clamp fast-rising transients. Its design centers on low dynamic impedance (ZZT ≈ 1.2 Ω typical), tight VBR tolerance (±5%), and thermal stability via junction-to-lead resistance of 25 °C/W.
It is rated for 600 W non-repetitive peak pulse power (10/1000 µs waveform), supports 100 A forward surge current (8.3 ms half-sine), and maintains <5 µA reverse leakage at VRWM = 5.8 V - enabling reliable operation in 5–6 V rail protection without false triggering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 5.8 V - Maximum continuous reverse operating voltage; must be ≥ circuit's DC operating voltage to avoid conduction during normal operation. |
| VBR @ IT = 10 mA | 6.45–7.14 V - Breakdown voltage range ensures robust turn-on margin above 5.8 V while avoiding premature clamping. |
| VC @ IPP = 57 A | ≤10.5 V - Clamping voltage limits downstream component stress during 600 W transient events. |
| IPP | 57 A - Peak pulse current capacity defines maximum surge energy the device can absorb without failure. |
| Response Time | <1 ns - Enables suppression of sub-nanosecond ESD and lightning-induced spikes before system ICs are damaged. |
| ESD Rating | Class 3 (>16 kV HBM) - Meets IEC 61000-4-2 Level 4 for robust board-level electrostatic discharge immunity. |
| UL Recognition | UL 497B (File #E210057) - Certified for use in isolated loop telecom and industrial control protection circuits. |
Pinout & Package
Package: SMB (Surface Mount Body), Case 403A - Void-free thermosetting plastic, Pb-free, RoHS-compliant, with modified L-bend leads for enhanced solder joint reliability and 260°C/10 s reflow tolerance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to ground or lower-potential node in unidirectional TVS configuration; enables low-VF (≤1.3 V @ 3 A) path for fault currents. |
| Cathode | Current exit terminal during reverse breakdown | Connected to protected line; polarity band identifies cathode; carries full transient current into ground during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W Peak Pulse Power (10/1000 µs) | Supports high-energy surges common in automotive load-dump and industrial motor switching environments. |
| AEC−Q101 Qualified | Validated for automotive under-hood and powertrain applications requiring extended temperature (-65°C to +150°C) and reliability compliance. |
| UL 497B Recognition | Enables direct use in safety-critical isolated loop circuits (e.g., 4–20 mA sensor transmitters) without additional certification effort. |
| Low Clamping Ratio (VC/VBR ≈ 1.54) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio suppressors, improving system robustness. |
| ESD >16 kV (HBM) | Eliminates need for secondary ESD protection on PCBs where P6SMB6.8AT3 serves as primary front-end defense. |
Applications
| Automotive Power Input Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 5 V microcontroller power input against ISO 7637-2 pulse 1 (inductive load dump) and pulse 3a/b (switching noise) in vehicle ECUs. IC Role / Device Role: Unidirectional TVS placed between VIN and GND, clamping transients before they reach LDO or MCU VDD pins. Use Value: Limits voltage to ≤10.5 V during 57 A surges, preventing latch-up or permanent damage to 5.5 V absolute-maximum-rated MCUs. |
Use Scenario: Safeguarding analog outputs of 4–20 mA current-loop transmitters against field wiring faults and ESD events. IC Role / Device Role: TVS connected across output terminals (IOUT–GND) to shunt induced transients away from precision DAC and op-amp circuitry. Use Value: UL 497B recognition validates safe integration into certified loop-powered instrumentation without redesigning isolation barriers. |
| Medical Equipment Power Rails | Telecom Line Card Protection |
Use Scenario: Shielding low-voltage logic supplies (e.g., 3.3 V FPGA core rails) in portable diagnostic devices from ESD and coupling noise. IC Role / Device Role: Secondary protection stage after bulk filtering, placed adjacent to power entry connector to minimize trace inductance. Use Value: Sub-1 ns response ensures clamping occurs before 15 kV contact ESD pulses exceed IC damage thresholds. |
Use Scenario: Protecting Ethernet PHY power pins and auxiliary control lines on carrier-grade line cards exposed to lightning-induced surges. IC Role / Device Role: Unidirectional TVS on 3.3 V/5 V bias rails, coordinated with gas discharge tubes (GDTs) for staged surge handling. Use Value: 600 W rating allows absorption of residual energy after GDT crowbarring, preventing thermal runaway in downstream silicon. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.8A | Lower peak power (400 W), same SMB package, VRWM = 5.8 V, VC = 11.2 V @ 35.7 A | Not UL 497B recognized; lacks AEC−Q101 qualification | Acceptable for cost-sensitive consumer electronics where automotive or safety certification is not required. |
| 1.5SMC6.8A | Higher power (1500 W), larger SMC package (Case 403D), VRWM = 5.8 V, VC = 10.5 V @ 143 A | Requires PCB layout change due to larger footprint and higher thermal mass | Preferred when system-level surge testing exceeds 600 W requirements or when longer pulse durations (e.g., 10/1000 µs) dominate. |
Compared with SMAJ6.8A and 1.5SMC6.8A, the P6SMB6.8AT3 uniquely balances 600 W surge capability, AEC−Q101 qualification, UL 497B recognition, and SMB footprint - making it optimal for space-constrained automotive and industrial designs needing certified, drop-in-ready protection.
Availability
P6SMB6.8AT3 is available at Aetrix Electronics and suitable for automotive ECU power inputs, industrial 4–20 mA transmitter interfaces, medical device logic rails, and telecom line card bias supplies requiring stable component supply and long-term lifecycle support.
Supply support for P6SMB6.8AT3 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 (now onsemi) is a global semiconductor supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and IoT applications.
The P6SMB6.8AT3 belongs to the P6SMBxxAT3G/SZP6SMBxxAT3G series - a family of AEC−Q101-qualified, UL 497B-recognized unidirectional TVS diodes engineered specifically for robust transient suppression in harsh-environment power and signal lines.
FAQ
What is the maximum clamping voltage of the P6SMB6.8AT3 under surge conditions?
The P6SMB6.8AT3 clamps to a maximum of 10.5 V when subjected to its rated peak pulse current of 57 A (10/1000 µs waveform). This value is guaranteed per the datasheet's Electrical Characteristics table and reflects worst-case device behavior at TA = 25°C. The P6SMB6.8AT3 achieves this low clamping voltage through optimized Zener junction design and low dynamic impedance, ensuring downstream components see minimal overvoltage stress.
Is the P6SMB6.8AT3 suitable for automotive applications?
Yes, the P6SMB6.8AT3 is AEC−Q101 qualified and PPAP capable, confirming its suitability for automotive applications including engine control units, body electronics, and infotainment power supplies. Its operating temperature range of −65°C to +150°C, robust surge rating (600 W), and UL 497B recognition make the P6SMB6.8AT3 appropriate for under-hood and chassis-mounted systems subject to load dump and ESD stress.
Does the P6SMB6.8AT3 have UL certification for safety-critical circuits?
Yes, the P6SMB6.8AT3 is UL 497B recognized (File #E210057) for use in isolated loop circuit protection - a requirement for certified industrial and telecom equipment. This certification covers performance in strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge testing, distinguishing the P6SMB6.8AT3 from generic TVS diodes lacking formal safety agency validation.
What is the leakage current specification for the P6SMB6.8AT3 at its working voltage?
The P6SMB6.8AT3 exhibits a maximum reverse leakage current (IR) of 1000 µA at its working peak reverse voltage (VRWM) of 5.8 V, measured at TA = 25°C. This low leakage ensures minimal standby power loss in battery-operated systems and prevents false triggering in precision analog circuits powered from 5–6 V rails - a key design advantage of the P6SMB6.8AT3 over higher-leakage alternatives.
What package type does the P6SMB6.8AT3 use, and what are its mounting characteristics?
The P6SMB6.8AT3 uses the SMB (Case 403A) surface-mount package - a compact, void-free thermosetting plastic body with modified L-bend leads for enhanced solder wetting and mechanical reliability. It supports reflow soldering up to 260°C for 10 seconds and may be mounted in any orientation. The P6SMB6.8AT3's SMB footprint enables high-density PCB layouts while maintaining thermal performance via 25 °C/W junction-to-lead resistance.
P6SMB6.8AT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- -
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- -
- Unidirectional Channels:
- -
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- -
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- -
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
P6SMB6.8AT3 FAQ
1.How can I place an order for P6SMB6.8AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB6.8AT3 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 P6SMB6.8AT3 reliable?
The price and inventory of P6SMB6.8AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB6.8AT3 is usually 5 days.
3.What payment methods are accepted for P6SMB6.8AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB6.8AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB6.8AT3?
P6SMB6.8AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB6.8AT3 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 P6SMB6.8AT3?
For technical support, including P6SMB6.8AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB6.8AT3 requirements.
6.How does Aetrix verify that P6SMB6.8AT3 is sourced from the original manufacturer or authorized distributors?
All P6SMB6.8AT3 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 P6SMB6.8AT3 meets industry standards.
7.What is the process for return or replacement of P6SMB6.8AT3?
All P6SMB6.8AT3 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB6.8AT3, 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 P6SMB6.8AT3 part is unused and in its original packaging.
Return procedure for P6SMB6.8AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB6.8AT3 Tags
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