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onsemi P6SMB11CAT3
- Part No.:
- P6SMB11CAT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- -
- Datasheet:
-
P6SMB11CAT3.pdf
- Description:
- TVS ZENER BIDIRECT 600W 11V SMB
- Quantity:
- Payment:
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Inventory:3,306
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Product details
Overview
P6SMB11CAT3 from ON Semiconductor is a bidirectional 600 W transient voltage suppressor (TVS) diode designed for parallel overvoltage protection of sensitive electronics. It features a 9.4 V working peak reverse voltage (VRWM), 11 V nominal Zener breakdown voltage (VBR), and clamps transients to 15.6 V at 38 A peak pulse current (IPP), making it suitable for automotive power line surge suppression and industrial I/O port protection.
For engineers reviewing the P6SMB11CAT3 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin relative to system operating voltage, peak pulse current capability under 1 ms 10/1000 µs waveform, UL 497B certification for isolated loop protection, and SMB (DO-214AA) package compatibility with high-density PCB layouts.
Technical Context
The P6SMB11CAT3 operates as a bidirectional avalanche diode, symmetrically clamping both positive and negative transients above its VRWM threshold. Its low zener impedance and sub-1 ns response time enable fast suppression of ESD and lightning-induced surges without significant overshoot when properly laid out.
It is rated for 600 W non-repetitive peak power at TL = 25°C with 1 ms pulse width, and derates linearly above 75°C junction-to-lead (RJL = 40 °C/W). Thermal performance is validated using ON Semiconductor's recommended FR-4 footprint per Case 403A outline.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Power | 600 W @ 1 ms 10/1000 µs waveform - supports robust surge immunity in automotive and industrial environments |
| Working Peak Reverse Voltage (VRWM) | 9.4 V - must be ≥ continuous DC operating voltage to avoid leakage conduction during normal operation |
| Zener Breakdown Voltage (VBR) | 10.5–11.6 V @ 1 mA - defines precise turn-on threshold for bidirectional clamping |
| Clamping Voltage (VC) | 15.6 V @ 38 A IPP - maximum voltage seen by protected circuit during worst-case surge |
| Leakage Current | <5 µA @ 9.4 V - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| Junction Capacitance | 865 pF @ 0 V - impacts high-frequency signal integrity; relevant for data lines below ~10 MHz |
| ESD Rating | Class 3 (>16 kV HBM) - exceeds IEC 61000-4-2 Level 4 for system-level ESD robustness |
| UL Recognition | UL 497B (QVGQ2, File #E210057) - certified for isolated loop circuit protection in safety-critical telecom and medical systems |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, void-free thermosetting plastic case (Case 403A). Dimensions: 4.32 mm × 2.13 mm × 1.02 mm (L × W × H); polarity band not indicated; leads are modified L-bend for enhanced pad contact.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Marked End) | Anode/Cathode terminal (bidirectional) | No polarity marking; either end serves as cathode depending on transient polarity - symmetrical clamping behavior |
| Anode (Unmarked End) | Anode/Cathode terminal (bidirectional) | Identical electrical role to marked end; device functions identically regardless of orientation on PCB |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping architecture | Enables single-device protection of AC signals, differential buses, or ungrounded systems without polarity concerns |
| Sub-1 ns response time | Minimizes voltage overshoot before clamping engages - critical for protecting fast-switching logic and analog front-ends |
| UL 497B recognition | Validated for use in safety-isolated telecom loops and medical equipment interfaces requiring certified surge protection |
| Pb-free Surmetic package | RoHS-compliant, solderable at 260°C for 10 s - compatible with standard lead-free reflow profiles and high-reliability manufacturing |
| 600 W surge rating | Withstands ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 2 Ω/12 Ω generator tests in typical board layouts |
Applications
| Automotive Power Line Protection | Industrial PLC I/O Port Protection |
|---|---|
Use Scenario: Suppressing load dump and alternator ripple transients on 12 V battery-fed ECUs and sensors. IC Role / Device Role / Timing Role: Parallel-connected TVS diode providing instantaneous clamping to protect downstream regulators and CAN transceivers. Use Value: Limits voltage to ≤15.6 V during 38 A surges, preventing latch-up or burnout of 16 V-rated components. | Use Scenario: Guarding 24 V digital input modules against field-wiring induced surges and ground bounce. IC Role / Device Role / Timing Role: Bidirectional overvoltage clamp placed between input terminal and common rail. Use Value: Maintains signal integrity during 1 kV/500 A surge events while adding <1 ns delay - no impact on 10 kHz polling rates. |
| Medical Equipment Isolated Interfaces | Telecom Loop-Powered Sensors |
Use Scenario: Protecting isolated RS-485 ports and analog sensor inputs in patient-monitoring devices. IC Role / Device Role / Timing Role: UL 497B-certified transient suppressor bridging primary and secondary sides of isolation barriers. Use Value: Meets stringent safety requirements for isolated loop protection without compromising creepage/clearance distances. | Use Scenario: Safeguarding 4–20 mA current-loop transmitters connected to long outdoor cables susceptible to lightning induction. IC Role / Device Role / Timing Role: Bidirectional clamping element across loop terminals to shunt induced common-mode energy. Use Value: Clamps induced surges to safe levels while maintaining loop accuracy - leakage <5 µA avoids current-source error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11CA | Same SMB package, identical VRWM/VBR/VC specs, but rated for 600 W with different thermal test conditions (TA-based vs TL-based derating) | Designed for ambient-temperature-limited applications; less suitable for high-power-density heatsinked layouts | Select SMBJ11CA when board-level thermal management relies on ambient airflow rather than lead conduction |
| 1.5SMC11CA | Larger SMC (DO-214AB) package; same electrical specs but higher thermal mass and 1.5 kW peak power rating | Used where mechanical robustness or higher single-pulse energy absorption is required, e.g., outdoor enclosures | Choose 1.5SMC11CA when layout allows larger footprint and system-level testing demands >600 W margin |
Compared with SMBJ11CA and 1.5SMC11CA, the P6SMB11CAT3 offers optimized lead-to-board thermal conduction (RJL = 40 °C/W) for compact, high-density designs where junction temperature rise must be minimized under repeated surge stress.
Availability
P6SMB11CAT3 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC I/O hardening, and medical isolated interface design requiring stable component supply and full traceability.
Supply support for P6SMB11CAT3 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 power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The P6SMB11CAT3 belongs to the P6SMBxxCAT3 series of bidirectional TVS diodes engineered specifically for cost-sensitive, high-reliability surge protection in space-constrained surface-mount applications.
FAQ
What is the clamping voltage of the P6SMB11CAT3 under maximum surge current?
The P6SMB11CAT3 clamps to 15.6 V at its rated peak pulse current of 38 A, measured using the standard 10/1000 µs waveform. This value is guaranteed across temperature and represents the maximum voltage imposed on protected circuitry during worst-case transient events. The P6SMB11CAT3 maintains this clamping performance with low dynamic impedance, ensuring consistent protection across production lots.
Is the P6SMB11CAT3 unidirectional or bidirectional?
The P6SMB11CAT3 is a bidirectional transient voltage suppressor, meaning it provides symmetrical clamping for both positive- and negative-going transients. Its datasheet explicitly states "Bidirectional*" and confirms no polarity band marking - either terminal functions as anode or cathode depending on transient polarity. This makes the P6SMB11CAT3 ideal for AC-coupled lines, differential interfaces, and floating systems where polarity cannot be assumed.
Does the P6SMB11CAT3 meet UL 497B certification?
Yes, the P6SMB11CAT3 carries UL 497B recognition under File #E210057 for protector classification (QVGQ2). It has passed all required tests including strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge validation - not just flammability. This certification applies directly to the P6SMB11CAT3 device, enabling its use in safety-critical telecom and medical isolated loop applications without additional system-level qualification.
What is the thermal resistance specification for the P6SMB11CAT3?
The P6SMB11CAT3 has a junction-to-lead thermal resistance (RJL) of 40 °C/W, measured with zero lead length on a 1″ square copper pad (FR-4 board). This parameter governs temperature rise under sustained power dissipation and is critical for reliability in high-duty-cycle surge environments. The P6SMB11CAT3 also specifies junction-to-ambient resistance (RJA) of 226 °C/W, but RJL is the dominant path for short-duration pulses.
Can the P6SMB11CAT3 replace older P6SMB11A variants?
Yes, the P6SMB11CAT3 is a direct replacement for legacy P6SMB11A parts, retaining identical electrical specifications, SMB package dimensions, and pinout. The "T3" suffix denotes 13-inch tape-and-reel packaging, and the "G" indicates Pb-free compliance - both are backward-compatible enhancements. No PCB layout or schematic changes are needed when upgrading to the P6SMB11CAT3, and its UL 497B certification adds assurance not present in earlier versions.
P6SMB11CAT3 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:
- -
P6SMB11CAT3 FAQ
1.How can I place an order for P6SMB11CAT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB11CAT3 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 P6SMB11CAT3 reliable?
The price and inventory of P6SMB11CAT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB11CAT3 is usually 5 days.
3.What payment methods are accepted for P6SMB11CAT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB11CAT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB11CAT3?
P6SMB11CAT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB11CAT3 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 P6SMB11CAT3?
For technical support, including P6SMB11CAT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB11CAT3 requirements.
6.How does Aetrix verify that P6SMB11CAT3 is sourced from the original manufacturer or authorized distributors?
All P6SMB11CAT3 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 P6SMB11CAT3 meets industry standards.
7.What is the process for return or replacement of P6SMB11CAT3?
All P6SMB11CAT3 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB11CAT3, 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 P6SMB11CAT3 part is unused and in its original packaging.
Return procedure for P6SMB11CAT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB11CAT3 Tags
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Diodes Incorporated
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