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onsemi P6SMB47AT3G
- Part No.:
- P6SMB47AT3G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB47AT3G.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:10,649
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Product details
Overview
P6SMB47AT3G 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 40.2 V working peak reverse voltage (VRWM), 47 V nominal Zener breakdown voltage (VBR) at 1 mA test current, clamps to 64.8 V at 9.3 A peak pulse current (IPP), and exhibits <5 µA leakage above 10 V. It is widely deployed in industrial power supplies and automotive ECUs to suppress ESD and lightning-induced surges.
For engineers reviewing the P6SMB47AT3G datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin over operating voltage, clamping voltage vs. protected IC absolute maximum ratings, surge current capability under 1 ms 10/1000 µs waveform, and UL 497B certification for isolated loop protection.
Technical Context
This device operates as a silicon avalanche diode with sharp Zener breakdown characteristics, optimized for fast transient suppression (<1 ns response time) in parallel-clamp configuration. Its low dynamic impedance ensures stable clamping across varying surge currents, while its thermally robust SURMETIC® SMB package enables reliable operation up to +150°C junction temperature.
The P6SMB47AT3G complies with AEC-Q101 for automotive use and meets Class 3 HBM ESD rating (>16 kV). Its 600 W peak power rating is specified at TL = 25°C with 1 ms pulse width, and derates linearly above 75°C junction-to-lead thermal resistance of 40°C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 40.2 V - Maximum continuous reverse voltage before significant leakage; must exceed circuit's DC operating voltage by ≥10%. |
| VBR @ IT=1 mA | 47.05 V (min) to 49.4 V (max) - Zener breakdown threshold defining turn-on precision; tight 5% tolerance enables predictable clamping onset. |
| VC @ IPP=9.3 A | 64.8 V - Clamped voltage during 10/1000 µs surge; determines maximum stress on downstream components. |
| IPP | 9.3 A - Peak pulse current it safely shunts without degradation; correlates directly to 600 W surge energy handling. |
| IR @ VRWM | <5 µA - Reverse leakage at rated working voltage; ensures minimal standby power loss in high-impedance circuits. |
| Response Time | <1 ns - Time from transient onset to clamping conduction; critical for protecting fast logic and analog interfaces. |
| UL Recognition | UL 497B QVGQ2 - Certified for isolated loop circuit protection; validates reliability under sustained overvoltage and endurance testing. |
Pinout & Package
Package: SMB (Case 403A), surface-mount, void-free thermosetting plastic with cathode polarity band. Dimensions: 4.06–4.60 mm (E), 3.30–3.95 mm (D), 1.95–2.47 mm (A), 0.76–1.60 mm (L).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during reverse-biased clamping | Connected to ground or low-impedance return path; carries full surge current during transient events. |
| Cathode | High-side connection to protected line | Connected to the rail or signal being protected; polarity band identifies this terminal for correct PCB orientation. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Handles 10/1000 µs transients up to 9.3 A without failure-sufficient for IEC 61000-4-5 Level 4 surges in industrial environments. |
| AEC-Q101 qualified | Validated for automotive underhood applications including engine control modules and body electronics with extended temperature cycling. |
| UL 497B recognition | Approved for telecom and process control isolated loops where safety-critical overvoltage protection is mandated. |
| <1 ns response time | Minimizes voltage overshoot before clamping engages-critical for safeguarding 3.3 V and 5 V microcontrollers and interface ICs. |
| Pb-free & RoHS compliant | Meets global environmental regulations; compatible with lead-free reflow profiles up to 260°C for 10 seconds. |
Applications
| Industrial Power Supply Protection | Automotive Engine Control Unit (ECU) |
|---|---|
|
Use Scenario: Protecting 48 V DC input stage of programmable logic controller (PLC) power module against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional parallel clamp suppressing transients >60 V while maintaining <5 µA leakage at 48 V nominal rail. Use Value: Limits voltage seen by downstream DC-DC controllers to ≤64.8 V, preventing latch-up or permanent damage during 100 V/100 ms load dump events. |
Use Scenario: Safeguarding CAN transceiver supply pins in engine management systems exposed to battery reversal and jump-start surges. IC Role / Device Role / Timing Role: Fast-response TVS placed between VCC and GND to clamp spikes before they reach 5 V regulator input. Use Value: Enables compliance with ISO 16750-2 electrical stress tests by clamping 100 V/50 ms pulses to <65 V within <1 ns, preserving transceiver functionality. |
| Medical Equipment Input Stage | Telecom Line Interface Protection |
|
Use Scenario: Guarding AC/DC adapter output feeding patient-monitoring analog front-end against ESD and conducted surges per IEC 61000-4-2/4-4. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V auxiliary rail, coordinated with secondary LC filtering. Use Value: Maintains system uptime by absorbing 8 kV contact ESD events without degradation-validated by >16 kV HBM rating and UL 497B isolation compliance. |
Use Scenario: Protecting Ethernet PHY power pins in PoE-powered network switches against induced lightning surges on upstream cabling. IC Role / Device Role / Timing Role: Secondary-level TVS on 3.3 V/5 V bias rails, placed after primary gas discharge tube (GDT) in cascaded protection scheme. Use Value: Provides precise low-clamping backup protection (64.8 V) after GDT crowbars high-energy surges, ensuring PHY ICs remain below 70 V absolute max rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ47A | Same SMB package, but lower 400 W peak power and higher 69.4 V clamping voltage at 7.2 A IPP. | Less suitable for high-energy 10/1000 µs surges requiring >600 W headroom; acceptable only in cost-sensitive consumer designs. | Select P6SMB47AT3G when UL 497B certification, AEC-Q101 qualification, or 600 W surge margin is mandatory. |
| 1.5SMC47A | Higher 1500 W rating but larger SMC package (7.11 × 6.22 mm); 64.8 V clamping identical, but 10.3 A IPP. | Requires PCB layout change due to footprint incompatibility; preferred only when system-level surge requirements exceed 600 W. | Choose P6SMB47AT3G for space-constrained SMB layouts where 600 W suffices and UL/AEC validation is required. |
Compared with SMAJ47A and 1.5SMC47A, the P6SMB47AT3G delivers certified 600 W surge immunity in the smallest standard surface-mount footprint with automotive-grade reliability and isolated-loop safety approval-making it optimal for industrial and automotive PCBs where size, certification, and consistent clamping performance are jointly critical.
Availability
P6SMB47AT3G is available at Aetrix Electronics and suitable for industrial power supplies, automotive ECUs, medical equipment input stages, and telecom line interfaces requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P6SMB47AT3G 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 manufacturer specializing in power management, analog, sensor, and connectivity solutions for automotive, industrial, and cloud power applications.
The P6SMB47AT3G belongs to the P6SMBxxAT3G series of unidirectional TVS diodes engineered specifically for robust, standards-compliant transient suppression in harsh environments-including AEC-Q101 automotive and UL 497B isolated loop systems.
FAQ
What is the clamping voltage of the P6SMB47AT3G at its rated peak pulse current?
The P6SMB47AT3G clamps to 64.8 V at its rated peak pulse current of 9.3 A under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and defines the maximum voltage imposed on protected circuitry during a full-rated surge event. The P6SMB47AT3G maintains this clamping performance across its qualified operating temperature range of −65°C to +150°C.
Is the P6SMB47AT3G suitable for automotive applications?
Yes, the P6SMB47AT3G is AEC-Q101 qualified and PPAP capable, making it suitable for automotive applications including engine control units, body control modules, and infotainment power rails. Its SURMETIC® SMB package withstands thermal cycling and mechanical vibration, and its 600 W surge rating meets ISO 7637-2 Pulse 5a/b requirements when properly mounted near the protected node.
Does the P6SMB47AT3G have UL recognition?
Yes, the P6SMB47AT3G carries UL 497B recognition (File #E210057, Category QVGQ2) for isolated loop circuit protection. This certification confirms successful completion of strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge testing-validating its use in telecom, industrial control, and medical isolation barriers where regulatory compliance is mandatory.
What is the maximum reverse leakage current for the P6SMB47AT3G at its working voltage?
The P6SMB47AT3G exhibits a maximum reverse leakage current of 5 µA at its working peak reverse voltage of 40.2 V. This ultra-low leakage ensures minimal power loss in high-impedance monitoring circuits and preserves battery life in always-on automotive subsystems. Leakage remains stable across the full −65°C to +150°C operating temperature range.
How does the P6SMB47AT3G compare to bidirectional TVS diodes?
The P6SMB47AT3G is unidirectional and intended for DC rail protection where polarity is fixed; it offers lower clamping voltage than equivalent bidirectional devices like P6SMB47CAT3G (which clamps at 70.1 V). For AC or floating signal lines requiring symmetrical protection, a bidirectional variant is necessary-but for 48 V power inputs or CAN VCC rails, the P6SMB47AT3G provides superior clamping efficiency and tighter parameter control.
P6SMB47AT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 40.2V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.8V
- Current - Peak Pulse (10/1000µs):
- 9.3A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 425pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
P6SMB47AT3G FAQ
1.How can I place an order for P6SMB47AT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB47AT3G 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 P6SMB47AT3G reliable?
The price and inventory of P6SMB47AT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB47AT3G is usually 5 days.
3.What payment methods are accepted for P6SMB47AT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB47AT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB47AT3G?
P6SMB47AT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB47AT3G 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 P6SMB47AT3G?
For technical support, including P6SMB47AT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB47AT3G requirements.
6.How does Aetrix verify that P6SMB47AT3G is sourced from the original manufacturer or authorized distributors?
All P6SMB47AT3G 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 P6SMB47AT3G meets industry standards.
7.What is the process for return or replacement of P6SMB47AT3G?
All P6SMB47AT3G units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB47AT3G, 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 P6SMB47AT3G part is unused and in its original packaging.
Return procedure for P6SMB47AT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB47AT3G Tags
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