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onsemi 1.5SMC82AT3
- Part No.:
- 1.5SMC82AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC82AT3.pdf
- Description:
- TVS DIODE 70.1VWM 113VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,435
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Product details
Overview
1.5SMC82AT3 from ON Semiconductor is a unidirectional 1500 W peak power transient voltage suppressor (TVS) diode designed for overvoltage protection in DC power rails and signal lines. It features a 70.1 V minimum breakdown voltage (VBR), 82 V nominal Zener voltage, 113 V maximum clamping voltage (VC) at 13.3 A peak pulse current (IPP), <1 ns response time, and UL 497B recognition for isolated loop circuit protection.
For engineers reviewing the 1.5SMC82AT3 datasheet, pinout, applications, or equivalent options, key selection criteria include working peak reverse voltage (70.1–77.8 V), clamping performance under 1 ms transients, low leakage (<5 µA @ 77.8 V), thermal resistance (RJA = 165 °C/W), and SMC surface-mount package compatibility with automated assembly.
Technical Context
The 1.5SMC82AT3 operates as a unidirectional Zener-based TVS diode, conducting only in reverse bias above its breakdown threshold to shunt surge energy to ground. Its silicon junction exhibits low dynamic impedance and temperature coefficient (0.105 %/°C), enabling stable clamping across industrial temperature ranges (–65 to +150 °C).
It is rated for 1500 W non-repetitive peak pulse power (10/1000 µs waveform), supports forward surge current up to 200 A (8.3 ms half-sine), and meets ESD Class 3 (>16 kV HBM). The device uses ON Semiconductor's Surmetic™ SMC package with modified L-bend leads for robust solder joint reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W @ 1 ms, defines maximum single-event surge energy it can safely clamp without failure |
| Working Peak Reverse Voltage (VRWM) | 70.1 V, maximum continuous DC or peak AC voltage the device blocks before entering avalanche conduction |
| Breakdown Voltage (VBR) | 77.9 V max @ 1 mA test current, ensures reliable turn-on margin above operating rail |
| Clamping Voltage (VC) | 113 V @ 13.3 A IPP, actual voltage seen by protected circuit during worst-case transient |
| Leakage Current | <5 µA @ 77.8 V, minimizes standby power loss and avoids false triggering in high-impedance circuits |
| Response Time | <1 ns, enables suppression of fast-rising ESD and lightning-induced transients before downstream IC damage |
| ESD Rating | Class 3 (>16 kV) per Human Body Model, qualifies for direct interface with user-accessible ports |
Pinout & Package
Package: SMC (Case 403), surface-mount plastic package with void-free transfer-molded thermosetting resin, corrosion-resistant finish, and modified L-bend leads for enhanced pad adhesion. Cathode indicated by molded polarity notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current return path during clamping | Connected to system ground or low-impedance return plane to sink surge current |
| Cathode | Protected line connection point | Connected to the voltage rail or signal line requiring overvoltage protection |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition | Qualified for isolated loop circuit protection - meets strike voltage, endurance, dielectric withstand, and discharge testing per safety standard |
| Low Clamping Ratio | VC/VBR ≈ 1.45 (113 V / 77.9 V), minimizing overvoltage stress on downstream components during surge events |
| High Surge Robustness | Withstands 200 A forward surge (8.3 ms) and 13.3 A reverse pulse - suitable for automotive load-dump and industrial switching transients |
| Thermal Stability | Temperature coefficient of 0.105 %/°C ensures predictable VBR drift over –65 to +150 °C operating range |
Applications
| Industrial Power Supply Protection | Automotive ECUs |
|---|---|
Use Scenario: Protecting 72 V battery-fed DC/DC converter inputs against load dump and alternator surges. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed across input rail to clamp transients before they reach regulator ICs. Use Value: Limits voltage to ≤113 V during 13.3 A pulses, preventing damage to 80 V-rated MOSFETs and controllers. | Use Scenario: Safeguarding CAN transceiver power pins in engine control units exposed to ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Primary overvoltage clamp on VCC rail, activated within <1 ns to suppress sub-microsecond spikes. Use Value: Maintains rail integrity below 113 V while supporting >16 kV ESD immunity per HBM - critical for field-reliable CAN communication. |
| Medical Equipment Input Stages | Telecom Line Interface Cards |
Use Scenario: Guarding AC/DC adapter outputs feeding sensitive analog front-ends in patient monitors. IC Role / Device Role / Timing Role: Final-stage transient suppressor on low-noise 5 V or 12 V distribution bus. Use Value: Adds <5 µA leakage at 77.8 V - avoids loading precision references or ADC reference rails. | Use Scenario: Protecting Ethernet PHY power supplies and data-line surge paths in PoE-powered switches. IC Role / Device Role / Timing Role: Secondary protection element after gas discharge tube (GDT), handling residual fast transients. Use Value: Fast <1 ns response complements slower GDTs, ensuring full 10/1000 µs waveform clamping per IEC 61000-4-5 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ82A | 600 W peak power, SMB package (smaller footprint), 113 V clamping at 5.3 A IPP | Limited to lower-energy transients; unsuitable for automotive load dump or industrial 1500 W requirements | Select when board space is constrained and surge threat level is ≤600 W (e.g., consumer USB ports) |
| 1.5KE82A | Through-hole DO-201 package, identical 1500 W rating and 113 V clamping, but no UL 497B recognition | Requires manual insertion; lacks certification for isolated loop safety-critical telecom/medical use | Select for legacy through-hole designs where UL 497B is not mandated and reflow compatibility is unnecessary |
Compared with SMBJ82A and 1.5KE82A, the 1.5SMC82AT3 uniquely combines 1500 W surge capability, SMC surface-mount form factor, and UL 497B certification - making it optimal for space-constrained, safety-compliant industrial and automotive PCBs requiring automated assembly.
Availability
1.5SMC82AT3 is available at Aetrix Electronics and suitable for industrial power supply protection, automotive ECU design, medical equipment input stages, and telecom line interface cards requiring stable component supply and certified transient suppression.
Supply support for 1.5SMC82AT3 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 discrete devices for automotive, industrial, and communications markets.
The 1.5SMC82AT3 belongs to the SMC-series transient voltage suppressors - engineered for high-energy surge clamping in surface-mount power rail protection applications where reliability, fast response, and safety certification are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC82AT3 under maximum rated surge current?
The 1.5SMC82AT3 has a maximum clamping voltage (VC) of 113 V when subjected to its peak pulse current (IPP) of 13.3 A, measured using a 10/1000 µs waveform. This value is specified in the ON Semiconductor datasheet and defines the upper voltage limit imposed on the protected circuit during worst-case transient events. Designers must ensure downstream components tolerate this clamping level.
Does the 1.5SMC82AT3 meet UL 497B certification, and what does that mean for my design?
Yes, the 1.5SMC82AT3 carries UL 497B recognition (File #116110) for protectors in isolated loop circuits. This certification confirms it passed rigorous tests including strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge performance - validating its suitability for safety-critical telecom, medical, and industrial isolation barriers where regulatory compliance is mandatory.
Can the 1.5SMC82AT3 be used in bidirectional protection configurations?
No, the 1.5SMC82AT3 is a unidirectional TVS diode and is not rated for bidirectional operation. Its electrical characteristics - including breakdown voltage, clamping, and leakage - are specified only for reverse-bias conduction. For bidirectional protection, ON Semiconductor offers separate part numbers (e.g., 1.5SMC82AT3-G for bidirectional variants), but the 1.5SMC82AT3 itself conducts only from cathode to anode during overvoltage events.
What is the thermal resistance and derating behavior of the 1.5SMC82AT3 at elevated ambient temperatures?
The 1.5SMC82AT3 has a junction-to-ambient thermal resistance (RJA) of 165 °C/W under standard FR-4 PCB conditions. Its DC power dissipation derates linearly above 25 °C at 6.1 mW/°C, and peak pulse power must be reduced per Figure 3 in the datasheet - e.g., to ~75% of 1500 W at 75 °C ambient. Proper copper pour and layout are essential to maintain safe junction temperatures.
How does the 1.5SMC82AT3 compare to the 1.5SMC75AT3 in terms of voltage ratings and application fit?
The 1.5SMC82AT3 has a higher working peak reverse voltage (70.1 V vs. 64.1 V) and nominal Zener voltage (82 V vs. 75 V) than the 1.5SMC75AT3, making it better suited for 72 V battery systems or higher-voltage industrial rails. Both share identical 1500 W rating and SMC package, but the 1.5SMC82AT3's 113 V clamping provides greater margin above 80 V-rated components compared to the 1.5SMC75AT3's 103 V clamping.
1.5SMC82AT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AB, SMC
- 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):
- 13.3A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMC
1.5SMC82AT3 FAQ
1.How can I place an order for 1.5SMC82AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC82AT3 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 1.5SMC82AT3 reliable?
The price and inventory of 1.5SMC82AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC82AT3 is usually 5 days.
3.What payment methods are accepted for 1.5SMC82AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC82AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC82AT3?
1.5SMC82AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC82AT3 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 1.5SMC82AT3?
For technical support, including 1.5SMC82AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC82AT3 requirements.
6.How does Aetrix verify that 1.5SMC82AT3 is sourced from the original manufacturer or authorized distributors?
All 1.5SMC82AT3 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 1.5SMC82AT3 meets industry standards.
7.What is the process for return or replacement of 1.5SMC82AT3?
All 1.5SMC82AT3 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC82AT3, 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 1.5SMC82AT3 part is unused and in its original packaging.
Return procedure for 1.5SMC82AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC82AT3 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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Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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