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onsemi 1SMC16AT3
- Part No.:
- 1SMC16AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1SMC16AT3.pdf
- Description:
- TVS DIODE 16VWM 26VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:9,226
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Product details
Overview
1SMC16AT3 from ON Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) diode designed for parallel clamping protection of sensitive electronics against ESD, lightning surges, and inductive switching transients. It features a 16 V working peak reverse voltage (VRWM), 19.7 V typical breakdown voltage (VBR) at 1 A test current, 26 V maximum clamping voltage (VC) at 57.7 A peak pulse current, and sub-1 ns response time. It is used in automotive power line protection and industrial power supply input stages.
For engineers reviewing the 1SMC16AT3 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin relative to protected IC VMAX, peak pulse current handling under IEC 61000-4-5 surge waveforms, UL 497B certification for isolated loop circuits, and SMC package thermal performance on FR-4 PCBs.
Technical Context
The 1SMC16AT3 operates as a Zener-based unidirectional TVS diode with avalanche breakdown behavior. Its clamping action begins at VRWM = 16 V and fully engages at VBR = 17.8–19.7 V (min–nom), limiting transient voltages to ≤26 V at IPP = 57.7 A under 10/1000 µs waveform conditions. Thermal design relies on junction-to-lead resistance (RJL = 54.6 °C/W) and 260°C soldering tolerance for reflow compatibility.
It delivers Class 3 ESD immunity (>16 kV HBM), meets UL 497B for isolated loop circuit protection, and exhibits low leakage (<5 µA @ VRWM). The device is not bidirectional and requires cathode-anode polarity alignment per molded notch marking - critical for correct placement in DC-biased protection paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W @ 1 ms - sustains single high-energy surges per IEC 61000-4-5 Level 4 without failure |
| Working Peak Reverse Voltage (VRWM) | 16 V - maximum continuous DC or peak AC voltage the device blocks before clamping initiates |
| Breakdown Voltage (VBR) | 17.8–19.7 V @ IT = 1 A - precise Zener avalanche threshold defining turn-on onset |
| Clamping Voltage (VC) | 26 V @ IPP = 57.7 A - maximum voltage seen by protected circuit during worst-case surge |
| Response Time | <1 ns - enables suppression before fast transients (e.g., ESD) damage downstream ICs |
| Leakage Current | <5 µA @ 16 V - negligible standby power loss and signal integrity impact in high-impedance lines |
| ESD Rating | Class 3 (>16 kV HBM) - exceeds IEC 61000-4-2 Level 4 for robust board-level ESD hardening |
Pinout & Package
1SMC16AT3 is housed in the SMC (DO-214AB) surface-mount package (Case 403), measuring 5.59–6.10 mm × 6.60–7.11 mm × 1.90–2.41 mm (L×W×H), with modified L-bend leads for enhanced pad adhesion and cathode polarity indicated by a molded notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to ground or low-side reference in unidirectional clamp configuration |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to protected line (e.g., 12 V rail); polarity notch identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition | Qualified for isolated loop circuit protection - supports safety-critical telecom and medical isolation barriers |
| Pb-Free Packaging | G-suffix denotes RoHS-compliant Surmetic™ molding compound - compatible with lead-free reflow profiles |
| Low Clamping Ratio | VC / VBR ≈ 1.31 - tight voltage margin ensures protected ICs remain within absolute maximum ratings |
| High Surge Robustness | Withstands 200 A non-repetitive forward surge (IFSM) - handles inrush and fault currents beyond TVS duty |
| Thermal Reliability | RJL = 54.6 °C/W with 260°C/10s soldering tolerance - supports high-volume automated assembly without delamination |
Applications
| Automotive Power Line Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: 12 V battery-fed ECUs exposed to load dump (ISO 7637-2 Pulse 5a) and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between power rail and chassis ground, activated within <1 ns to limit voltage to ≤26 V. Use Value: Prevents overvoltage damage to CAN transceivers and microcontrollers rated for 36 V absolute max, enabling compliance with ISO 16750-2. |
Use Scenario: 24 V DC digital input modules receiving signals from field sensors in factory automation. IC Role / Device Role / Timing Role: Parallel-connected TVS on each input channel, clamping induced surges from relay coil flyback or nearby motor switching. Use Value: Maintains signal integrity by limiting transient overshoot to <26 V while adding <5 µA leakage - no impact on 4–20 mA loop accuracy. |
| Medical Equipment Power Entry | Telecom Isolated Interface Protection |
Use Scenario: Front-end AC/DC adapter inputs in diagnostic imaging devices requiring reinforced insulation and surge immunity. IC Role / Device Role / Timing Role: Primary-stage TVS across bulk capacitor terminals, absorbing line-to-ground surges per IEC 61000-4-5 (2 kV) Use Value: UL 497B recognition validates use in patient-connected equipment isolation boundaries - eliminates need for secondary certification testing. |
Use Scenario: RS-485 data lines crossing isolation barriers in base station backhaul units. IC Role / Device Role / Timing Role: Unidirectional clamp on isolated side of digital isolator, referenced to local ground to suppress common-mode transients. Use Value: Sub-1 ns response prevents bit errors during ESD events; 16 kV HBM rating ensures reliability in uncontrolled deployment environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ16A | Same VRWM (16 V) and VC (26 V), but lower PPK = 600 W and smaller SMB package (lower thermal mass) | Suitable only for lower-energy transients (IEC 61000-4-2 ESD, not full IEC 61000-4-5 surge) | Select when board space is constrained and surge threat level is limited to ESD or low-energy switching noise |
| 1.5SMC16A | Identical electrical specs and SMC package, but obsolete ON Semiconductor part (replaced by 1SMC16AT3G series) | No functional difference; legacy marking format lacks Pb-free 'G' suffix | Prefer 1SMC16AT3 for new designs due to guaranteed Pb-free compliance and active lifecycle support |
Compared with SMBJ16A and 1.5SMC16A, the 1SMC16AT3 provides higher surge robustness (1500 W vs. 600 W) and active manufacturing status with UL 497B certification - making it the preferred choice for industrial and automotive applications requiring full IEC 61000-4-5 compliance and long-term supply assurance.
Availability
1SMC16AT3 is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, medical power supplies, and telecom interface modules requiring stable component supply with full regulatory documentation and traceable lot history.
Supply support for 1SMC16AT3 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 consumer markets.
The 1SMC16AT3 belongs to the SMC-series Zener TVS family engineered for high-power transient suppression in harsh environments - targeting applications where reliability under repeated surge stress and regulatory certification (UL 497B) are mandatory.
FAQ
What is the clamping voltage of the 1SMC16AT3 under maximum surge conditions?
The 1SMC16AT3 has a maximum clamping voltage (VC) of 26 V when subjected to its rated peak pulse current of 57.7 A under a 10/1000 µs waveform. This value is measured per Figure 2 in the official ON Semiconductor datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case transient events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is the 1SMC16AT3 suitable for bidirectional signal line protection?
No, the 1SMC16AT3 is explicitly a unidirectional TVS diode and is not rated for bidirectional operation. Its electrical characteristics, including breakdown and clamping behavior, are specified only for reverse-biased conduction. For AC or dual-polarity signal lines, a dedicated bidirectional part such as 1SMC16AT3's counterpart in the 1SMCxxAT3-B series must be selected - using the 1SMC16AT3 in such configurations risks incomplete protection or device failure.
Does the 1SMC16AT3 meet UL 497B requirements for isolated loop protection?
Yes, the entire 1SMC5.0AT3 series - including the 1SMC16AT3 - carries Underwriters Laboratories recognition under UL 497B (File #E210057) for protectors in isolated loop circuits. This certification covers rigorous testing including strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge performance - confirming suitability for safety-critical telecom, medical, and industrial isolation barrier applications.
What is the thermal resistance and maximum soldering temperature for the 1SMC16AT3?
The 1SMC16AT3 has a junction-to-lead thermal resistance (RJL) of 54.6 °C/W and is rated for a maximum soldering temperature of 260°C for 10 seconds - fully compatible with standard lead-free reflow profiles. This specification ensures reliable attachment to FR-4 PCBs using ON Semiconductor's recommended minimum footprint, supporting high-yield automated assembly without thermal damage to the Surmetic™ package.
How does the 1SMC16AT3 differ from the older 1.5SMC16A part?
The 1SMC16AT3 replaces the obsolete 1.5SMC16A with identical electrical specifications (VRWM = 16 V, VC = 26 V, PPK = 1500 W) and SMC package, but adds Pb-free compliance (indicated by the 'G' suffix), updated Surmetic™ molding compound, and active manufacturing status. Unlike the legacy part, the 1SMC16AT3 is supported with current datasheets, UL 497B certification, and guaranteed long-term availability - making it the only recommended version for new designs.
1SMC16AT3 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):
- 16V
- Voltage - Breakdown (Min):
- 17.8V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- Current - Peak Pulse (10/1000µs):
- 57.7A
- 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
1SMC16AT3 FAQ
1.How can I place an order for 1SMC16AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMC16AT3 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 1SMC16AT3 reliable?
The price and inventory of 1SMC16AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMC16AT3 is usually 5 days.
3.What payment methods are accepted for 1SMC16AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMC16AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMC16AT3?
1SMC16AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMC16AT3 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 1SMC16AT3?
For technical support, including 1SMC16AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMC16AT3 requirements.
6.How does Aetrix verify that 1SMC16AT3 is sourced from the original manufacturer or authorized distributors?
All 1SMC16AT3 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 1SMC16AT3 meets industry standards.
7.What is the process for return or replacement of 1SMC16AT3?
All 1SMC16AT3 units undergo pre-shipment inspection (PSI). If there is an issue with 1SMC16AT3, 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 1SMC16AT3 part is unused and in its original packaging.
Return procedure for 1SMC16AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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