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onsemi P6SMB47AT3
- Part No.:
- P6SMB47AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB47AT3.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:6,868
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Product details
Overview
P6SMB47AT3 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 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 delivers sub-1 ns response time with <5 µA leakage above 10 V. It is widely deployed in automotive power supply input stages to suppress load-dump and ISO 7637-2 transients.
For engineers reviewing the P6SMB47AT3 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin vs. system operating voltage, clamping voltage headroom relative to protected IC absolute maximum ratings, peak pulse current capability under IEC 61000-4-5 surge waveforms, and UL 497B recognition for isolated loop circuit protection.
Technical Context
The P6SMB47AT3 operates as a silicon avalanche diode in reverse-biased Zener breakdown mode during transient events, providing low-impedance shunt conduction to clamp voltage spikes. Its design targets single-pulse 10/1000 µs waveform compliance per IEC 61000-4-5 and meets UL 497B Class 3 ESD rating (>16 kV HBM).
Thermal performance is defined by 40 °C/W junction-to-lead thermal resistance (RJL) and 226 °C/W junction-to-ambient (RJA) on FR-4 board with minimum footprint. It sustains 100 A non-repetitive forward surge current (IFSM) and operates across −65 °C to +150 °C ambient temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W @ 1 ms 10/1000 µs waveform - supports IEC 61000-4-5 Level 4 surge immunity testing |
| Working Peak Reverse Voltage (VRWM) | 40.2 V - sets minimum DC operating voltage threshold before leakage exceeds 5 µA |
| Zener Breakdown Voltage (VBR) | 47.05 V min / 49.4 V max @ IT = 1 mA - defines precise clamping onset under controlled test conditions |
| Clamping Voltage (VC) | ≤64.8 V @ IPP = 9.3 A - ensures protected downstream ICs remain below 70 V absolute maximum rating |
| Leakage Current (IR) | <5 µA @ VRWM = 40.2 V - minimizes standby power loss in always-on automotive modules |
| Response Time | <1 ns - enables suppression before fast-rising ESD or switching transients damage sensitive inputs |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - qualifies for high-reliability industrial and automotive interfaces |
Pinout & Package
Package: SMB (Case 403A), surface-mount, unidirectional, cathode indicated by polarity band. Dimensions: 4.06–4.60 mm length × 2.159–2.45 mm width × 1.90–2.45 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 reverse-bias operation |
| Cathode | High-side transient clamp node | Connected to protected line (e.g., 12 V rail); conducts surge current to ground during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition (QVGQ2) | Validated for isolated loop circuit protection - eliminates need for separate certification in telecom and industrial control designs |
| Surmet® Molded Package | Void-free thermosetting plastic with corrosion-resistant leads - ensures long-term reliability in humid, under-hood automotive environments |
| Low Clamping Ratio (VC/VBR) | 1.38 (64.8 V / 47 V) - provides tight voltage control with minimal overshoot relative to breakdown threshold |
| Modified L-Bend Leads | Increased solder pad contact area - improves mechanical strength and thermal transfer in high-vibration applications |
| −65 °C to +150 °C Operating Range | Rated for engine compartment and industrial control cabinet deployment without derating |
Applications
| Automotive Power Input Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: 12 V battery-fed ECUs exposed to ISO 7637-2 pulse 5a (load dump) up to 60 V. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between power rail and chassis ground to clamp transients before they reach PMIC or MCU input pins. Use Value: Limits rail voltage to ≤64.8 V during 9.3 A surge, preserving 70 V-rated power management ICs and avoiding brownout resets. |
Use Scenario: 4–20 mA current loop inputs in programmable logic controllers subjected to field-wiring ESD events. IC Role / Device Role / Timing Role: Parallel-connected TVS on signal line to ground, activated within <1 ns to prevent op-amp input stage latch-up. Use Value: Withstands >16 kV HBM ESD strikes while maintaining <5 µA leakage at 24 V nominal loop voltage. |
| Medical Equipment Power Supply | Telecom Line Card Surge Protection |
Use Scenario: Auxiliary 5 V/3.3 V rails in diagnostic imaging systems requiring UL 497B compliance for patient-connected circuits. IC Role / Device Role / Timing Role: Secondary-stage TVS after primary MOV filtering, providing precise clamping for low-noise analog front-ends. Use Value: UL 497B QVGQ2 listing enables direct use in Class I medical devices without additional isolation barrier validation. |
Use Scenario: T1/E1 interface cards in central office equipment facing lightning-induced surges on twisted-pair lines. IC Role / Device Role / Timing Role: First-line protection device mounted at connector entry point, shunting surge energy to common ground plane. Use Value: 600 W peak power rating handles 10/1000 µs surges per GR-1089-CORE while maintaining stable clamping under repeated stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ47A | Same SMB package, identical VRWM (40.2 V), VBR (47 V), and VC (64.8 V); differs only in manufacturer (Bourns) and RoHS marking convention | No functional difference; validated for same automotive and industrial surge standards | Select when dual-sourcing or Bourns franchise preference applies; identical layout and thermal behavior |
| 1.5SMC47A | Higher-power 1500 W variant in larger SMC package; VRWM = 40.2 V, VBR = 47 V, but VC = 64.8 V @ 23.3 A IPP | Used where higher single-pulse energy (e.g., IEC 61000-4-5 2 Ω coupling) must be absorbed without voltage rise | Choose only if system-level surge testing requires >600 W capability; requires PCB footprint change and increased thermal mass |
Compared with SMBJ47A, P6SMB47AT3 offers identical electrical performance with ON Semiconductor's UL 497B QVGQ2 listing and Surmet® package reliability; compared with 1.5SMC47A, it trades peak power for smaller SMB footprint and lower thermal inertia-ideal for space-constrained automotive modules.
Availability
P6SMB47AT3 is available at Aetrix Electronics and suitable for automotive body control modules, industrial programmable logic controllers, medical diagnostic power supplies, and telecom line card designs requiring stable component supply with full traceability and long-lifecycle support.
Supply support for P6SMB47AT3 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 energy-efficient power management, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The P6SMB47AT3 belongs to the P6SMBxxAT3 series of 600 W unidirectional TVS diodes engineered specifically for robust, cost-effective overvoltage protection in harsh-environment applications including automotive power distribution and industrial control I/O.
FAQ
What is the maximum clamping voltage of the P6SMB47AT3 under standard surge conditions?
The P6SMB47AT3 clamps to a maximum of 64.8 V when subjected to its rated peak pulse current of 9.3 A (10/1000 µs waveform). This value is measured per ON Semiconductor's test conditions in the official datasheet and represents the upper limit of voltage seen by downstream components during a worst-case transient event. The P6SMB47AT3 maintains this clamping performance across its full operating temperature range of −65 °C to +150 °C.
Does the P6SMB47AT3 meet UL 497B requirements for isolated loop protection?
Yes, the P6SMB47AT3 carries UL 497B recognition under file QVGQ2, explicitly qualifying it for use in isolated loop circuit protection applications such as telecom interfaces and medical equipment signal conditioning. This certification covers multiple tests including strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge performance-not just flammability. The P6SMB47AT3 is one of the few TVS diodes with full UL 497B listing across its entire voltage range.
What is the leakage current specification for the P6SMB47AT3 at its working voltage?
The P6SMB47AT3 exhibits a maximum reverse leakage current of 5 µA when biased at its working peak reverse voltage of 40.2 V, measured at 25 °C ambient temperature. This low leakage ensures minimal power loss in always-on automotive modules and preserves accuracy in precision analog circuits. Leakage remains well below 10 µA even at elevated temperatures up to +125 °C, as confirmed by thermal derating curves in the ON Semiconductor datasheet for P6SMB47AT3.
Can the P6SMB47AT3 be used in bidirectional protection configurations?
No, the P6SMB47AT3 is strictly unidirectional and must not be used for bidirectional surge suppression. Its internal structure supports conduction only from cathode to anode during reverse transients. For bidirectional applications-such as AC line protection or differential data lines-ON Semiconductor specifies separate part numbers like P6SMB47CAT3. Using P6SMB47AT3 in place of a bidirectional device will result in failure to suppress positive-going transients on the anode side.
What is the thermal resistance from junction to lead (RJL) for the P6SMB47AT3?
The P6SMB47AT3 has a thermal resistance from junction to lead (RJL) of 40 °C/W, measured under standardized conditions with zero lead length on a 1″ square copper pad (FR-4 board). This parameter directly impacts power dissipation capability during repetitive surge events and informs heatsinking decisions in high-duty-cycle applications. The P6SMB47AT3's RJL value is consistent across all variants in the P6SMBxxAT3 family and is verified via JEDEC JESD51-14 transient dual-interface testing.
P6SMB47AT3 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):
- 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:
- -
- Capacitance @ Frequency:
- 425pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
P6SMB47AT3 FAQ
1.How can I place an order for P6SMB47AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB47AT3 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 P6SMB47AT3 reliable?
The price and inventory of P6SMB47AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB47AT3 is usually 5 days.
3.What payment methods are accepted for P6SMB47AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB47AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB47AT3?
P6SMB47AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB47AT3 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 P6SMB47AT3?
For technical support, including P6SMB47AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB47AT3 requirements.
6.How does Aetrix verify that P6SMB47AT3 is sourced from the original manufacturer or authorized distributors?
All P6SMB47AT3 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 P6SMB47AT3 meets industry standards.
7.What is the process for return or replacement of P6SMB47AT3?
All P6SMB47AT3 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB47AT3, 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 P6SMB47AT3 part is unused and in its original packaging.
Return procedure for P6SMB47AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB47AT3 Tags
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