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onsemi P6SMB11AT3
- Part No.:
- P6SMB11AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB11AT3.pdf
- Description:
- TVS DIODE 9.4VWM 15.6VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:7,668
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Product details
Overview
P6SMB11AT3 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 9.4 V working peak reverse voltage (VRWM), 11.05 V breakdown voltage at 1 mA test current, clamps to ≤15.6 V at 38 A peak pulse current, and responds in <1 ns - deployed in automotive power supplies, industrial I/O modules, and telecom interface circuits.
For engineers reviewing the P6SMB11AT3 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, SMB package mechanical data, clamping behavior under 10/1000 µs surge, UL 497B certification status, and direct alternative part comparisons for ESD and lightning surge hardening.
Technical Context
The P6SMB11AT3 operates as a Zener-based avalanche clamp, conducting only when reverse voltage exceeds its specified breakdown threshold (VBR = 10.5–11.6 V). Its low dynamic impedance ensures stable clamping up to 38 A peak pulse current (IPP), with VC held ≤15.6 V under standardized 10/1000 µs waveform conditions.
It exhibits <5 µA leakage at VRWM = 9.4 V, a temperature coefficient of +0.075 %/°C for VBR, and junction capacitance of 1550 pF at 0 V bias (1 MHz). The device is rated for −65 °C to +150 °C operation and qualified per UL 497B for isolated loop circuit protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W @ 1 ms, 10/1000 µs waveform - sustains single high-energy surges without failure |
| Working Peak Reverse Voltage | 9.4 V - maximum continuous DC or peak AC voltage the device blocks before clamping |
| Breakdown Voltage (VBR) | 10.5–11.6 V @ IT = 1 mA - precise Zener conduction onset for predictable protection threshold |
| Clamping Voltage (VC) | ≤15.6 V @ IPP = 38 A - limits downstream voltage stress during surge events |
| Leakage Current (IR) | <1 µA @ VRWM = 9.4 V - negligible standby power loss and signal integrity impact |
| Response Time | <1 ns - enables suppression before transient energy couples into sensitive circuitry |
| ESD Rating | Class 3 (>16 kV HBM) - withstands human-body-model electrostatic discharge without degradation |
| UL Recognition | UL 497B QVGQ2 - certified for use in isolated loop protectors per safety standard |
Pinout & Package
Package: SMB (Case 403A), surface-mount, unidirectional, cathode-indicated by band. Dimensions: 4.32 mm × 3.56 mm × 2.13 mm (L × W × H); lead-free (Pb−Free) compliant; 260 °C soldering tolerance for 10 s.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during forward conduction; reference node for reverse-biased protection | Connected to system ground or low-impedance return path to enable clamping action |
| Cathode | High-side connection point; polarity indicator band marks this terminal | Connected to protected line (e.g., 12 V rail or RS-485 bus) - conducts surge current to ground |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse rating | Handles IEC 61000-4-5 Level 4 (4 kV line-to-earth) surges without degradation |
| Low clamping ratio (VC/VBR ≈ 1.41) | Minimizes overvoltage margin between trigger and clamp - critical for 12 V system compatibility |
| UL 497B recognition | Validated for use in safety-critical telecom and industrial isolator circuits per protector category |
| 1550 pF junction capacitance | Compatible with <1 Mbps RS-485 and 10/100BASE-TX Ethernet interfaces without signal distortion |
| −65 °C to +150 °C operating range | Supports under-hood automotive and industrial control cabinet deployments |
| Pb−Free (RoHS-compliant) packaging | Meets global environmental compliance requirements for commercial and medical equipment |
Applications
| Automotive Power Distribution | Industrial Digital I/O Protection |
|---|---|
Use Scenario: 12 V battery rail in engine control units exposed to load dump transients up to 35 V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between fused 12 V input and DC-DC converter input stage. Use Value: Clamps transients to ≤15.6 V within <1 ns, preventing damage to downstream LDOs and microcontrollers. |
Use Scenario: 24 V PLC digital input channels subject to field-wiring induced surges. IC Role / Device Role / Timing Role: Parallel-connected TVS on each channel's input node, referenced to common ground. Use Value: Limits voltage excursion to safe levels for optocoupler input stages while maintaining <1 µA leakage at 24 V nominal. |
| Telecom Interface Protection | Medical Equipment Power Entry |
Use Scenario: RS-485 data lines in base station backhaul equipment subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional protection not required; unidirectional P6SMB11AT3 used on VCC-supplied side of termination network. Use Value: Provides 600 W surge handling with 1550 pF capacitance - no data rate degradation at 10 Mbps. |
Use Scenario: AC/DC adapter output stage in patient-connected diagnostic devices requiring reinforced isolation. IC Role / Device Role / Timing Role: Secondary-side TVS on isolated 5 V/12 V rails feeding analog front-end and display controllers. Use Value: UL 497B certification confirms suitability for protected secondary circuits in Class II medical devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A | Same SMB package; lower peak power (400 W); higher clamping voltage (18.2 V @ 32.6 A) | Less robust for IEC 61000-4-5 Level 4; suitable for cost-sensitive consumer-grade designs | Select when 400 W rating suffices and board space prohibits larger packages |
| 1.5SMC11A | Different SMC package (larger footprint); same 11 V VBR; identical 600 W rating and 15.6 V VC | Higher thermal mass supports repeated surge events; requires PCB layout change | Choose for high-reliability industrial systems needing enhanced thermal cycling endurance |
Compared with P6SMB11AT3, SMAJ11A trades clamping performance and surge margin for lower cost, while 1.5SMC11A retains full electrical equivalence but demands larger board area and improved heat sinking capability.
Availability
P6SMB11AT3 is available at Aetrix Electronics and suitable for automotive power distribution, industrial digital I/O protection, and telecom interface circuits requiring stable component supply, RoHS compliance, and UL 497B-certified surge immunity.
Supply support for P6SMB11AT3 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 supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, and medical markets.
The P6SMB11AT3 belongs to the P6SMBxxAT3 series of unidirectional TVS diodes engineered specifically for high-reliability DC rail and interface line protection in harsh electromagnetic environments.
FAQ
What is the maximum clamping voltage of the P6SMB11AT3 under surge conditions?
The P6SMB11AT3 clamps to a maximum of 15.6 V when subjected to its rated peak pulse current of 38 A under the standard 10/1000 µs waveform. This value is guaranteed across temperature and process variation per ON Semiconductor's datasheet specification, ensuring consistent overvoltage limiting for downstream 12 V logic and power components.
Is the P6SMB11AT3 suitable for bidirectional signal line protection?
No - the P6SMB11AT3 is a unidirectional TVS diode, optimized for DC power rail protection where polarity is fixed. For bidirectional signal lines like USB or RS-485, ON Semiconductor offers the P6SMB11CAT3 variant. Using P6SMB11AT3 on AC-coupled or reversible signals risks forward conduction and unintended clamping behavior.
Does the P6SMB11AT3 meet UL 497B requirements for isolated loop protection?
Yes - the P6SMB11AT3 carries UL 497B recognition under file #E210057, specifically qualified in the "Protector" category (QVGQ2). This certification covers dielectric withstand, endurance conditioning, and strike voltage breakdown testing - confirming its suitability for use in isolated telecom and industrial loop-powered systems.
What is the thermal resistance from junction-to-lead (RJL) for the P6SMB11AT3?
The P6SMB11AT3 has a thermal resistance from junction-to-lead (RJL) of 40 °C/W, measured with zero lead length on a 1″ square copper pad (FR-4 board). This parameter governs short-duration surge energy dissipation and informs heatsinking decisions when multiple surges occur in rapid succession.
Can the P6SMB11AT3 be used in automotive under-hood applications?
Yes - the P6SMB11AT3 is rated for −65 °C to +150 °C operating temperature and qualified for automotive-grade reliability. Its 600 W surge rating, low leakage (<1 µA at 9.4 V), and UL 497B certification make it appropriate for engine control unit power inputs, body control module I/O protection, and ADAS sensor supply rails.
P6SMB11AT3 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):
- 9.4V
- Voltage - Breakdown (Min):
- 10.5V
- Voltage - Clamping (Max) @ Ipp:
- 15.6V
- Current - Peak Pulse (10/1000µs):
- 38A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 1550pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
P6SMB11AT3 FAQ
1.How can I place an order for P6SMB11AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB11AT3 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 P6SMB11AT3 reliable?
The price and inventory of P6SMB11AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB11AT3 is usually 5 days.
3.What payment methods are accepted for P6SMB11AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB11AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB11AT3?
P6SMB11AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB11AT3 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 P6SMB11AT3?
For technical support, including P6SMB11AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB11AT3 requirements.
6.How does Aetrix verify that P6SMB11AT3 is sourced from the original manufacturer or authorized distributors?
All P6SMB11AT3 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 P6SMB11AT3 meets industry standards.
7.What is the process for return or replacement of P6SMB11AT3?
All P6SMB11AT3 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB11AT3, 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 P6SMB11AT3 part is unused and in its original packaging.
Return procedure for P6SMB11AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB11AT3 Tags
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