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onsemi P6SMB15CAT3
- Part No.:
- P6SMB15CAT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB15CAT3.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:4,436
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Product details
Overview
P6SMB15CAT3 from ON Semiconductor is a bidirectional 600 W transient voltage suppressor (TVS) diode designed for parallel overvoltage protection in DC power rails and signal lines. It features a 12.8 V working peak reverse voltage (VRWM), 15 V nominal 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 supplies and industrial I/O interfaces.
For engineers reviewing the P6SMB15CAT3 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin vs. system operating voltage, 1 ns typical response time, UL 497B recognition for isolated loop protection, and SMB (DO-214AA) surface-mount compatibility with standard PCB footprints.
Technical Context
The P6SMB15CAT3 operates as a bidirectional Zener-based TVS, leveraging avalanche breakdown to clamp both positive and negative transients. Its low zener impedance and fast <1 ns response ensure minimal overshoot during ESD or lightning-induced surges.
It is rated for 600 W non-repetitive peak pulse power (10/1000 µs waveform), with thermal derating above 75°C junction temperature and validated performance across −65°C to +150°C operating range. The device meets Class 3 (>16 kV) HBM ESD rating and UL 497B certification for isolated loop circuit protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W @ 10/1000 µs waveform - sustains single high-energy surges without failure |
| Working Peak Reverse Voltage (VRWM) | 12.8 V - maximum continuous DC or peak AC voltage before clamping initiates |
| Breakdown Voltage (VBR) | 15.05 V (nominal) @ 1 mA - precise Zener threshold for predictable turn-on |
| Clamping Voltage (VC) | 21.2 V @ 28 A IPP - limits transient voltage seen by downstream components |
| Junction Capacitance (Cj) | 645 pF @ 0 V, 1 MHz - low enough for <100 Mbps data lines but not RF applications |
| Leakage Current (IR) | <5 µA @ 12.8 V - negligible standby power loss in battery-powered systems |
| Response Time | <1 ns - ensures clamping activation before most ICs experience latch-up or damage |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, void-free thermosetting plastic case with modified L-bend leads for enhanced pad contact. Dimensions per Case 403A-03: 4.06–4.60 mm width (E), 3.30–3.95 mm length (D), 1.90–2.45 mm height (A).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked band side) | High-side terminal in unidirectional mode; symmetric terminal in bidirectional operation | Provides reference point for clamping polarity; bidirectional symmetry eliminates orientation dependency in AC-coupled paths |
| Anode | Low-side terminal in unidirectional mode; symmetric terminal in bidirectional operation | Completes transient current path to ground or return rail; identical electrical behavior to cathode under reverse bias due to bidirectional design |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Protects AC-coupled signals and dual-polarity rails without external polarity management |
| UL 497B recognition (QVGQ2) | Validated for isolated loop protection in telecom and industrial safety-critical circuits |
| ESD rating >16 kV HBM | Meets IEC 61000-4-2 Level 4 for system-level ESD immunity without additional shielding |
| Low clamping ratio (VC/VBR = 1.41) | Minimizes voltage margin required between protected IC's absolute max rating and VRWM |
| Pb-free Surmetic package | RoHS-compliant construction with corrosion-resistant finish and 260°C solderability |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: 12 V battery rail in engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed directly across microcontroller power pins and CAN transceiver VCC. Use Value: Limits transients to 21.2 V, staying safely below 24 V absolute maximum ratings of automotive-grade MCUs and transceivers. |
Use Scenario: 24 V digital input module receiving signals from field sensors in factory automation. IC Role / Device Role / Timing Role: Front-end transient suppressor on each channel before optocoupler or level-shifter input. Use Value: Absorbs 600 W surges from inductive load switching while maintaining <5 µA leakage to preserve input logic thresholds. |
| Medical Equipment Power Rails | Telecom Line Interface Protection |
Use Scenario: Auxiliary 5 V/3.3 V supply in patient monitoring devices requiring low-noise, low-leakage protection. IC Role / Device Role / Timing Role: Secondary clamping device downstream of primary filtering, guarding ADC references and analog front-ends. Use Value: 645 pF capacitance avoids signal distortion in sub-MHz analog paths; <1 ns response prevents transient coupling into sensitive measurement circuits. |
Use Scenario: Isolated RS-485 or Ethernet PHY interface in networked medical or building control systems. IC Role / Device Role / Timing Role: Bidirectional TVS on differential pair (A/B) and common-mode line (GND or shield) per UL 497B requirements. Use Value: UL-recognized protection enables compliance with IEC 60950-1 and IEC 62368-1 without redesigning isolation barriers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15CA | Same SMB package, 600 W rating, but higher clamping voltage (23.2 V @ 25.9 A) and lower VRWM (12.8 V same) | Less margin for 15 V-rated ICs; requires tighter layout to compensate for 2 V higher VC | Select when legacy SMAJ footprint reuse is required and clamping margin allows 23.2 V peak |
| 1.5SMC15CA | Higher power (1500 W), larger SMC package (DO-214AB), same 15 V VBR and 12.8 V VRWM | Requires PCB rework for larger 7.1 × 6.2 mm footprint; suited for higher-energy surge environments | Choose for industrial motor drives or outdoor equipment where 1500 W surge capability justifies board space cost |
Compared with SMAJ15CA and 1.5SMC15CA, the P6SMB15CAT3 delivers optimal balance of low clamping voltage (21.2 V), compact SMB footprint, and UL 497B certification - making it preferred for space-constrained, safety-certified 12–15 V rail protection where 600 W surge handling suffices.
Availability
P6SMB15CAT3 is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O protection, and medical equipment power rails requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P6SMB15CAT3 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 manufacturer specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and IoT applications.
The P6SMB15CAT3 belongs to the P6SMBxxCAT3 series of bidirectional TVS diodes engineered for high-reliability overvoltage protection in harsh environments - targeting applications demanding UL recognition, low clamping, and robust surge immunity without design complexity.
FAQ
What is the clamping voltage of the P6SMB15CAT3 at its rated peak pulse current?
The P6SMB15CAT3 clamps to 21.2 V at its specified peak pulse current of 28 A (10/1000 µs waveform). This value is measured under standardized test conditions and defines the maximum voltage imposed on protected circuitry during a surge event. Designers must verify that this clamping voltage remains below the absolute maximum ratings of downstream components when used in the P6SMB15CAT3 application.
Is the P6SMB15CAT3 unidirectional or bidirectional, and how does that affect PCB layout?
The P6SMB15CAT3 is a bidirectional TVS diode, meaning it provides symmetrical clamping for both positive and negative transients without polarity sensitivity. This eliminates orientation constraints during placement - unlike unidirectional variants, the P6SMB15CAT3 can be mounted in either direction across a differential line or AC-coupled node. Its bidirectional nature simplifies layout and reduces BOM complexity in balanced signal paths.
Does the P6SMB15CAT3 meet UL 497B certification, and what does that enable?
Yes, the P6SMB15CAT3 carries UL 497B recognition (File #E210057, category QVGQ2) for isolated loop circuit protection. This certification validates performance in strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge testing - enabling direct use in telecom, industrial control, and medical systems requiring certified surge protection without additional third-party validation.
What is the thermal derating behavior of the P6SMB15CAT3 above 75°C lead temperature?
The P6SMB15CAT3 has a thermal resistance of 40°C/W (junction-to-lead) and derates linearly above 75°C: its DC power dissipation drops by 25 mW per °C rise. At 100°C lead temperature, maximum continuous power falls to 2.375 W. Engineers using the P6SMB15CAT3 in high-temperature enclosures must apply this derating to ensure reliability and avoid thermal runaway during sustained overvoltage events.
How does the junction capacitance of the P6SMB15CAT3 impact high-speed signal lines?
The P6SMB15CAT3 exhibits 645 pF junction capacitance at 0 V bias and 1 MHz, which makes it unsuitable for USB 2.0, HDMI, or PCIe signal integrity paths but appropriate for lower-speed interfaces like RS-232, RS-485, or 10/100BASE-TX Ethernet PHY lines. When applied in the P6SMB15CAT3 application, designers should place it close to connectors and avoid routing high-frequency traces through its pads to prevent signal degradation.
P6SMB15CAT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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:
- 645pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
P6SMB15CAT3 FAQ
1.How can I place an order for P6SMB15CAT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB15CAT3 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 P6SMB15CAT3 reliable?
The price and inventory of P6SMB15CAT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB15CAT3 is usually 5 days.
3.What payment methods are accepted for P6SMB15CAT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB15CAT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB15CAT3?
P6SMB15CAT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB15CAT3 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 P6SMB15CAT3?
For technical support, including P6SMB15CAT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB15CAT3 requirements.
6.How does Aetrix verify that P6SMB15CAT3 is sourced from the original manufacturer or authorized distributors?
All P6SMB15CAT3 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 P6SMB15CAT3 meets industry standards.
7.What is the process for return or replacement of P6SMB15CAT3?
All P6SMB15CAT3 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB15CAT3, 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 P6SMB15CAT3 part is unused and in its original packaging.
Return procedure for P6SMB15CAT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB15CAT3 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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