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onsemi P6SMB82AT3
- Part No.:
- P6SMB82AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB82AT3.pdf
- Description:
- TVS DIODE 70.1VWM 113VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:9,206
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Product details
Overview
P6SMB82AT3 from ON Semiconductor is a unidirectional 600 W transient voltage suppressor (TVS) diode designed for parallel overvoltage protection of sensitive electronics. It features a working peak reverse voltage (VRWM) of 70.1 V, breakdown voltage (VBR) of 82 V at 1 mA test current, clamping voltage (VC) of 113 V at 5.3 A peak pulse current, and sub-1 ns response time - making it suitable for protecting power supply rails and I/O lines in industrial power supplies and automotive ECUs.
For engineers reviewing the P6SMB82AT3 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM ≥ system DC bus voltage, VC margin relative to IC absolute maximum ratings, surge current handling (IPP = 5.3 A), UL 497B certification for isolated loop protection, and SMB package thermal performance under repetitive transients.
Technical Context
The P6SMB82AT3 operates as a silicon avalanche diode with sharp Zener-type breakdown characteristics, triggered when reverse voltage exceeds its specified VBR. Its low zener impedance and fast <1 ns response enable effective clamping of ESD and lightning-induced surges before downstream components experience overstress.
It is rated for 600 W non-repetitive peak pulse power (10/1000 µs waveform), supports 100 A forward surge current (8.3 ms half-sine), and exhibits only 5 µA max reverse leakage at VRWM - ensuring minimal standby power loss while maintaining high immunity to false triggering during normal operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W @ 1 ms (10/1000 µs waveform); defines maximum single-event surge energy the device can absorb without failure |
| Working Peak Reverse Voltage (VRWM) | 70.1 V; maximum continuous reverse voltage the device blocks without significant leakage - must exceed circuit's max operating voltage |
| Breakdown Voltage (VBR) | 82 V @ IT = 1 mA; voltage at which avalanche conduction begins - used to verify device grading and tolerance band (±5%) |
| Clamping Voltage (VC) | 113 V @ IPP = 5.3 A; maximum voltage seen by protected load during worst-case surge - determines whether downstream ICs remain within safe operating area |
| Reverse Leakage Current (IR) | <5 µA @ VRWM; ensures negligible standby power draw and avoids false triggering in high-impedance bias networks |
| Response Time | <1 ns; enables suppression before transient propagates into sensitive analog or digital circuitry |
| ESD Rating | Class 3 (>16 kV HBM); qualifies for direct interface protection in handheld and industrial field equipment |
Pinout & Package
Package: SMB (Case 403A), surface-mount, void-free thermosetting plastic with modified L-bend leads and cathode polarity band. Dimensions: 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 |
|---|---|---|
| Anode | Current return path during clamping | Connected to ground or low-impedance return node; must be routed with minimal inductance to preserve clamping speed |
| Cathode | Protected line connection point | Connected to the rail or signal being protected; polarity band identifies this terminal - reverse orientation causes catastrophic failure |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition (QVGQ2) | Validated for isolated loop circuit protection - required for telecom, industrial Ethernet, and medical data interfaces |
| Low Clamping Ratio (VC/VBR) | 1.38 (113 V / 82 V); tight ratio minimizes overvoltage margin needed between protected IC's max rating and clamp level |
| Pb-Free (G suffix) & RoHS Compliant | Meets global environmental compliance mandates without derating - compatible with standard SnPb and lead-free reflow profiles |
| High Surge Capability | Withstands 100 A forward surge (8.3 ms) - supports robust protection in motor drive and relay coil snubbing applications |
| Thermal Resistance (RJL) | 40 °C/W junction-to-lead - enables reliable power dissipation on standard FR-4 PCBs using ON Semi's recommended footprint |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) I/O Protection |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) power supply subjected to ISO 7637-2 pulse 1 and pulse 2a transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed across input capacitor to clamp negative-going transients and prevent MOSFET gate oxide damage. Use Value: Clamps to 113 V within <1 ns, limiting stress on 100 V-rated input FETs and maintaining system uptime during load dump events. |
Use Scenario: LIN bus transceiver pins exposed to battery disconnect spikes and alternator load dump coupling in BCM. IC Role / Device Role / Timing Role: Parallel-connected TVS on LIN data line to shunt ESD and coupled surges before reaching transceiver ESD structures. Use Value: 16 kV HBM rating and 113 V clamping protect 3.3 V transceiver I/O while maintaining signal integrity due to low 0.105 pF capacitance at 0 V bias. |
| Medical Equipment Isolated Sensor Interface | Telecom DSL Line Card Surge Protection |
Use Scenario: 5 V isolated analog front-end powering temperature sensors in patient monitoring devices certified to IEC 60601-1. IC Role / Device Role / Timing Role: Secondary-side TVS on isolated 5 V rail to meet UL 497B requirements for protected secondary circuits. Use Value: UL 497B recognition validates compliance for isolated loop protection - eliminates need for additional certification testing of the full subsystem. |
Use Scenario: Primary-side protection on ADSL line card feeding twisted-pair interface subject to lightning-induced surges per ITU-T K.20/21. IC Role / Device Role / Timing Role: First-stage TVS on transformer-coupled line side, coordinated with gas discharge tube (GDT) for staged clamping. Use Value: 600 W peak power rating allows coordination with upstream GDT to handle multi-kA surges while limiting let-through voltage to <113 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ82A | Same SMB package, identical VRWM (70.1 V), VBR (82 V), and VC (113 V); 600 W rating; manufactured by Vishay | No UL 497B recognition; lacks isolated loop certification required for medical/telecom safety compliance | Select when UL certification is not mandated and cost optimization is prioritized |
| 1.5SMC82A | Higher package thermal resistance (RJA = 226 °C/W vs. 226 °C/W same but larger SMC package); same electrical specs; 1500 W rating | Larger SMC footprint requires PCB redesign; higher surge rating unnecessary for most 600 W use cases | Select only if legacy SMC layout exists or >1 kW surge headroom is explicitly required |
Compared with SMBJ82A and 1.5SMC82A, the P6SMB82AT3 uniquely combines SMB form factor, 600 W capability, and UL 497B certification - enabling drop-in compliance in safety-critical isolated interfaces without layout change or external certification burden.
Availability
P6SMB82AT3 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and medical sensor interfaces requiring stable component supply, long-term lifecycle support, and certified surge protection.
Supply support for P6SMB82AT3 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, sensing, and connectivity solutions for automotive, industrial, cloud, and medical markets.
The P6SMB82AT3 belongs to the P6SMBxxAT3 series of unidirectional TVS diodes engineered for high-reliability overvoltage protection in harsh environments - targeting applications where UL recognition, low clamping ratio, and SMB space constraints are critical.
FAQ
What is the maximum clamping voltage of the P6SMB82AT3 under surge conditions?
The P6SMB82AT3 has a maximum clamping voltage (VC) of 113 V when subjected to its rated peak pulse current (IPP) of 5.3 A using the standard 10/1000 µs waveform. This value is measured at TJ = 25°C and represents the upper limit of voltage imposed on the protected circuit during worst-case transient events - critical for verifying compatibility with downstream IC absolute maximum ratings.
Does the P6SMB82AT3 meet UL 497B requirements for isolated loop protection?
Yes, the P6SMB82AT3 is UL Recognized under file E210057 for protector classification QVGQ2 per UL 497B. This certification covers dielectric withstand, strike voltage breakdown, endurance conditioning, and discharge testing - validating its suitability for protecting secondary-side circuits in medical, telecom, and industrial isolation barriers where regulatory compliance is mandatory.
What is the reverse leakage current specification for the P6SMB82AT3 at its working voltage?
The P6SMB82AT3 specifies a maximum reverse leakage current (IR) of 5 µA at its working peak reverse voltage (VRWM) of 70.1 V. This low leakage ensures minimal power loss in always-on protection configurations and prevents false triggering in high-impedance bias networks - essential for battery-powered and precision analog systems.
Can the P6SMB82AT3 be used in bidirectional transient suppression applications?
No, the P6SMB82AT3 is a unidirectional TVS diode and must not be used for bidirectional protection. For bidirectional applications, ON Semiconductor offers the P6SMB82CAT3 variant - which shares the same VRWM and VBR but provides symmetrical clamping for AC-coupled or differential signal lines. Using P6SMB82AT3 in bidirectional roles risks permanent failure during positive half-cycle surges.
What is the thermal resistance from junction-to-lead (RJL) for the P6SMB82AT3, and why does it matter?
The P6SMB82AT3 has a thermal resistance from junction-to-lead (RJL) of 40 °C/W. This parameter directly impacts how effectively heat generated during surge events transfers from the silicon die to the PCB copper pad. A lower RJL enables higher transient power handling without exceeding junction temperature limits - especially important in compact layouts with limited copper area.
P6SMB82AT3 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):
- 70.1V
- Voltage - Breakdown (Min):
- 77.9V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 5.3A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 260pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
P6SMB82AT3 FAQ
1.How can I place an order for P6SMB82AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB82AT3 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 P6SMB82AT3 reliable?
The price and inventory of P6SMB82AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB82AT3 is usually 5 days.
3.What payment methods are accepted for P6SMB82AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB82AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB82AT3?
P6SMB82AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB82AT3 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 P6SMB82AT3?
For technical support, including P6SMB82AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB82AT3 requirements.
6.How does Aetrix verify that P6SMB82AT3 is sourced from the original manufacturer or authorized distributors?
All P6SMB82AT3 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 P6SMB82AT3 meets industry standards.
7.What is the process for return or replacement of P6SMB82AT3?
All P6SMB82AT3 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB82AT3, 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 P6SMB82AT3 part is unused and in its original packaging.
Return procedure for P6SMB82AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB82AT3 Tags
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