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onsemi P6SMB15AT3
- Part No.:
- P6SMB15AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB15AT3.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:5,787
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Product details
Overview
P6SMB15AT3 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 12.8 V working peak reverse voltage (VRWM), 15 V breakdown voltage (VBR) at 1 mA test current, and clamps transients to 21.2 V at 28 A peak pulse current - enabling robust surge immunity in automotive power inputs and industrial I/O interfaces.
For engineers reviewing the P6SMB15AT3 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin above operating voltage, clamping voltage vs. protected device absolute maximum rating, thermal derating at elevated ambient temperatures, and UL 497B recognition for isolated loop circuit protection.
Technical Context
The P6SMB15AT3 operates as a Zener-based avalanche clamp, triggered when reverse voltage exceeds its specified breakdown threshold. Its sub-1 ns response time and low dynamic impedance ensure fast suppression of ESD and lightning-induced surges without relying on external triggering circuitry.
It is rated for 600 W non-repetitive peak pulse power (10/1000 µs waveform), with thermal performance defined by 226 °C/W junction-to-ambient resistance on FR-4 board and 40 °C/W junction-to-lead resistance under zero-lead-length conditions - requiring careful PCB copper area design for sustained surge handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Peak Reverse Voltage (VRWM) | 12.8 V - maximum continuous DC or peak AC voltage the device blocks without clamping; must exceed system operating voltage by ≥10% for reliable margin. |
| Breakdown Voltage (VBR) | 15.05 V min / 15.8 V max @ 1 mA - defines precise turn-on threshold; tight 5.3% tolerance enables predictable clamping onset across temperature. |
| Clamping Voltage (VC) | 21.2 V @ 28 A IPP - maximum voltage seen by protected circuit during worst-case 10/1000 µs surge; determines whether downstream ICs remain within absolute maximum ratings. |
| Peak Pulse Power (PPK) | 600 W @ 1 ms - energy-handling capability for transient suppression; derates linearly above 75°C ambient per published curve. |
| Leakage Current (IR) | <5 µA @ 12.8 V - ensures negligible standby power loss and no interference with high-impedance sensing circuits. |
| ESD Rating | Class 3 (>16 kV HBM) - meets IEC 61000-4-2 Level 4 for system-level ESD immunity without additional front-end filtering. |
| UL Recognition | UL 497B QVGQ2 - certified for use in isolated loop circuit protection, including telecom and process control safety-critical interfaces. |
Pinout & Package
Package: SMB (Case 403A), surface-mount, unidirectional configuration with cathode indicated by polarity band. Dimensions: 4.06–4.60 mm length × 3.30–3.95 mm width × 2.159–2.45 mm height. Pb-free (RoHS-compliant) version marked with "G" suffix.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; establishes reference for clamping action during positive transients on cathode side. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 12 V rail); conducts avalanche current to anode when voltage exceeds VRWM + margin. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power rating | Supports IEC 61000-4-5 Level 4 (4 kV line-to-ground) surge testing without failure on properly laid out PCBs. |
| Clamping voltage ≤21.2 V at 28 A | Protects 24 V industrial controllers and automotive body electronics where ICs have 28 V absolute maximum ratings. |
| UL 497B recognition | Validated for use in safety-isolated analog input/output modules compliant with IEC 61000-4-5 and IEC 61326-1. |
| Sub-1 ns response time | Minimizes voltage overshoot before clamping engages, critical for protecting fast-switching MOSFET gates and CAN transceivers. |
| Low leakage <5 µA @ VRWM | Enables direct placement across battery-backed real-time clock (RTC) rails without accelerating battery drain. |
Applications
| Automotive Power Input Protection | Industrial Analog I/O Protection |
|---|---|
Use Scenario: 12 V battery feed to engine control unit (ECU) subjected to load dump (ISO 7637-2 Pulse 5a, up to 60 V/100 ms). IC Role / Device Role / Timing Role: Unidirectional TVS placed directly at connector entry point to shunt surge energy before reaching LDO regulators and microcontroller power pins. Use Value: Clamps peak voltage to 21.2 V, keeping downstream 28 V-rated power management ICs within safe operating area while surviving 600 W transient energy. |
Use Scenario: 4–20 mA current loop transmitter exposed to field wiring surges in factory automation systems. IC Role / Device Role / Timing Role: Parallel-connected TVS across loop terminals to limit common-mode transients before they reach precision DAC and op-amp signal conditioning stages. Use Value: UL 497B certification ensures compliance with isolated loop safety requirements; 12.8 V VRWM allows operation with 24 V loop supply while blocking normal operating voltage. |
| Medical Equipment ESD Protection | Telecom Line Interface Protection |
Use Scenario: Front-panel USB and button interfaces on portable diagnostic devices subject to human-body-model (HBM) ESD events. IC Role / Device Role / Timing Role: Localized TVS on each signal line adjacent to connectors to prevent latch-up or gate oxide damage in interface ICs. Use Value: >16 kV HBM rating eliminates need for secondary ESD filters; low capacitance (~1175 pF) avoids signal integrity degradation on 12 Mbps USB 1.1 lines. |
Use Scenario: RJ45 Ethernet port on VoIP phone connected to unshielded twisted-pair cabling in office environments. IC Role / Device Role / Timing Role: Primary surge protector on PHY-side differential pairs and power rails, coordinated with gas discharge tube (GDT) on line side. Use Value: Fast <1 ns response captures initial ESD edge before GDT fires; 21.2 V clamping protects 3.3 V Ethernet PHY transceivers with margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15A | Same SMB package, identical VRWM (12.8 V) and VC (21.2 V), but rated for 600 W with tighter VBR tolerance (15.0–15.8 V vs. 15.05–15.8 V). | No functional difference in clamping behavior; validated for same automotive and industrial surge standards. | Select SMBJ15A if tighter VBR binning is required for production consistency across temperature. |
| 1.5SMC15A | Larger SMC package (7.1 × 6.2 mm), higher thermal mass, same electrical specs but 1000 W peak power rating and 130 °C/W RJA. | Better suited for high-temperature environments (>85 °C ambient) or repeated surge events due to superior heat dissipation. | Choose 1.5SMC15A when board space permits and thermal derating at 125 °C ambient is required. |
Compared with SMBJ15A, P6SMB15AT3 offers identical protection performance in a cost-optimized SMB footprint; versus 1.5SMC15A, it trades thermal headroom for compactness - making it optimal for space-constrained 12 V power entry designs where single-event surge immunity is primary.
Availability
P6SMB15AT3 is available at Aetrix Electronics and suitable for automotive power inputs, industrial analog I/O modules, medical device front panels, and telecom line interfaces requiring stable component supply and full traceability.
Supply support for P6SMB15AT3 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, sensor, and connectivity solutions for automotive, industrial, cloud, and medical markets.
The P6SMB15AT3 belongs to the P6SMBxxAT3 series of unidirectional TVS diodes engineered for high-energy transient suppression in harsh environments - targeting applications demanding UL 497B certification and robust 600 W surge handling in compact SMB packages.
FAQ
What is the working peak reverse voltage (VRWM) of the P6SMB15AT3?
The P6SMB15AT3 has a working peak reverse voltage (VRWM) of 12.8 V, meaning it reliably blocks voltages up to this level in normal operation while remaining non-conductive. This value is selected to provide ≥10% margin above standard 12 V automotive and industrial supply rails, ensuring no false triggering during nominal conditions while maintaining fast response to overvoltage events. The P6SMB15AT3 maintains this specification across its full operating temperature range of −65 °C to +150 °C.
How does the clamping voltage of the P6SMB15AT3 compare to its breakdown voltage?
The P6SMB15AT3 has a breakdown voltage (VBR) of 15.05–15.8 V at 1 mA test current, while its maximum clamping voltage (VC) is 21.2 V at 28 A peak pulse current. This 6.4 V differential reflects the device's dynamic impedance under surge conditions - a lower value indicates better clamping efficiency. The P6SMB15AT3's VC is specifically validated for the 10/1000 µs waveform per IEC 61000-4-5, ensuring predictable protection of downstream components rated for ≤28 V absolute maximum voltage.
Is the P6SMB15AT3 RoHS-compliant and lead-free?
Yes, the P6SMB15AT3 is RoHS-compliant and lead-free, as confirmed by the "G" suffix in its full ordering designation (P6SMB15AT3G). ON Semiconductor's SURMETIC® SMB package uses Pb-free terminations and complies with JEDEC J-STD-020 moisture sensitivity level (MSL) 1 specifications. The device supports standard reflow profiles up to 260 °C for 10 seconds, and all external surfaces are corrosion-resistant with readily solderable leads - meeting IPC-J-STD-006 and IPC-A-610 Class 2 requirements.
Does the P6SMB15AT3 meet UL 497B certification requirements?
Yes, the P6SMB15AT3 is UL Recognized under standard UL 497B (File #E210057, Category QVGQ2) for isolated loop circuit protection. This certification covers validation of strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge performance - confirming suitability for safety-critical applications such as process control transmitters and medical isolation barriers. Unlike basic flammability-only certifications, UL 497B validates the P6SMB15AT3's functional reliability as a protector in faulted conditions.
What is the thermal resistance and derating behavior of the P6SMB15AT3?
The P6SMB15AT3 has a junction-to-ambient thermal resistance (RJA) of 226 °C/W on standard FR-4 board with ON Semiconductor's recommended footprint, and junction-to-lead resistance (RJL) of 40 °C/W under zero-lead-length conditions. Its DC power dissipation derates linearly above 75 °C ambient (25 mW/°C), and peak pulse power must be reduced per Figure 3 in the datasheet when ambient exceeds 25 °C - for example, to ~480 W at 50 °C ambient. These values are measured per JEDEC JESD51-2 and JESD51-14 standards and apply directly to the P6SMB15AT3 in SMB package.
P6SMB15AT3 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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 28A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 1175pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
P6SMB15AT3 FAQ
1.How can I place an order for P6SMB15AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB15AT3 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 P6SMB15AT3 reliable?
The price and inventory of P6SMB15AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB15AT3 is usually 5 days.
3.What payment methods are accepted for P6SMB15AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB15AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB15AT3?
P6SMB15AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB15AT3 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 P6SMB15AT3?
For technical support, including P6SMB15AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB15AT3 requirements.
6.How does Aetrix verify that P6SMB15AT3 is sourced from the original manufacturer or authorized distributors?
All P6SMB15AT3 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 P6SMB15AT3 meets industry standards.
7.What is the process for return or replacement of P6SMB15AT3?
All P6SMB15AT3 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB15AT3, 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 P6SMB15AT3 part is unused and in its original packaging.
Return procedure for P6SMB15AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB15AT3 Tags
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