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onsemi 1SMC16AT3G
- Part No.:
- 1SMC16AT3G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1SMC16AT3G.pdf
- Description:
- TVS DIODE 16VWM 26VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:11,698
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Product details
Overview
1SMC16AT3G from ON Semiconductor is a unidirectional 1500 W peak power Zener transient voltage suppressor (TVS) designed for parallel clamping protection of DC power rails and signal lines. It features a 16 V working peak reverse voltage (VRWM), 19.7 V minimum breakdown voltage (VBR) at 1 mA, 26 V maximum clamping voltage (VC) at 57.7 A peak pulse current (IPP), and sub-1 ns response time - deployed in automotive power supplies, industrial PLC I/O modules, and medical equipment surge interfaces.
For engineers reviewing the 1SMC16AT3G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, UL 497B-certified loop protection capability, thermal derating curves, SMC package mechanical data, and real-world clamping performance under 10/1000 µs transients - critical for ESD-hardened 24 V system design and IEC 61000-4-5 compliance planning.
Technical Context
The 1SMC16AT3G operates as a silicon avalanche diode with sharp Zener breakdown characteristics, optimized for single-pulse transient suppression per IEC 61000-4-5 Level 4 (4 kV/2 Ω). Its low dynamic impedance (< 0.5 Ω typical) ensures stable clamping across temperature (–65 °C to +150 °C) and maintains < 5 µA leakage above VRWM.
It uses ON Semiconductor's Surmetic™ SMC package (Case 403), featuring void-free thermoset molding, modified L-bend leads for enhanced pad adhesion, and 260 °C solderability tolerance. The device is rated for 200 A non-repetitive forward surge current (IFSM) and supports isolated loop circuit protection per UL 497B QVGV2 recognition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 16 V - Maximum continuous reverse operating voltage before clamping begins; sets minimum system bus voltage compatibility. |
| VBR (min @ IT=1 mA) | 19.7 V - Guaranteed avalanche onset threshold; ensures reliable triggering above nominal rail voltage. |
| VC (max @ IPP=57.7 A) | 26 V - Peak clamped voltage during 10/1000 µs surge; defines worst-case overvoltage seen by protected ICs. |
| PPK | 1500 W @ 1 ms - Single-pulse energy handling capacity; supports 4 kV/2 Ω IEC 61000-4-5 surges. |
| IR (max @ VRWM) | 5 µA - Reverse leakage at rated working voltage; negligible power loss in standby 24 V systems. |
| Response Time | < 1 ns - Time from transient onset to conduction; enables protection of high-speed logic and ADC inputs. |
| ESD Rating | Class 3 (>16 kV HBM) - Withstands human-body-model ESD events without degradation. |
Pinout & Package
1SMC16AT3G is housed in the SMC (DO-214AB) surface-mount package (Case 403), measuring 7.75 mm × 6.10 mm × 2.41 mm, with cathode indicated by molded notch and modified L-bend leads for robust PCB bonding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction or clamping | Connected to lower-potential side (e.g., GND or return path); forms low-impedance shunt to ground during transients. |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to protected line (e.g., 24 V rail); conducts when transient exceeds VRWM, diverting surge current away from load. |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition (QVGV2) | Validated for isolated loop circuit protection - meets safety requirements for telecom and medical isolation barriers. |
| Surmetic™ Package Reliability | Void-free thermoset molding and corrosion-resistant finish ensure >10-year field life in humid industrial environments. |
| Thermal Derating Support | RJA = 165 °C/W enables accurate ambient-temperature-based power derating up to 150 °C junction limit. |
| Low Clamping Ratio | VC/VBR ≈ 1.32 - Tight ratio minimizes overvoltage stress on downstream MOSFETs, op-amps, and microcontrollers. |
| High Surge Robustness | Withstands 200 A IFSM (8.3 ms half-sine) - suitable for motor drive back-EMF and relay coil snubbing. |
Applications
| Automotive Power Distribution | Industrial PLC Digital I/O |
|---|---|
|
Use Scenario: Protecting 24 V supply inputs in body control modules against load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC input, clamping transients within 1 ns to hold voltage below 26 V. Use Value: Prevents latch-up or permanent damage to buck controller ICs (e.g., LM5017) during 120 V/50 ms load dump events. |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring induced surges (IEC 61000-4-4/5). IC Role / Device Role / Timing Role: Parallel-connected TVS on each optocoupler input line, referenced to common ground, triggered only above 16 V. Use Value: Maintains signal integrity by limiting transient overshoot to ≤26 V, ensuring reliable opto-isolator turn-on without false triggering. |
| Medical Equipment Power Entry | Telecom Isolated Data Interfaces |
|
Use Scenario: Safeguarding AC/DC front-end rectifiers and PFC stages in Class II medical power supplies against lightning-induced surges. IC Role / Device Role / Timing Role: Primary-side TVS across bulk capacitor terminals, absorbing 1500 W pulses while maintaining < 5 µA leakage at 16 V. Use Value: Enables UL 60601-1 compliance by limiting secondary-side coupling energy and eliminating need for additional Y-capacitor filtering. |
Use Scenario: Protecting RS-485 transceiver VCC pins in isolated repeater nodes connected to long outdoor cable runs. IC Role / Device Role / Timing Role: Unidirectional clamp between VCC and ground on isolated DC-DC output, certified to UL 497B for loop protection. Use Value: Guarantees no failure propagation across isolation barrier during 4 kV common-mode surges, preserving functional safety integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ16A (ON Semiconductor) | 600 W PPK, same VRWM/VBR/VC but lower surge rating; SMB package (smaller footprint, higher RJA). | Lower energy handling limits use in IEC 61000-4-5 Level 3+ systems; suitable for space-constrained 12 V logic rails. | Select 1SMC16AT3G when 1500 W clamping and UL 497B certification are required; choose SMBJ16A only for cost-sensitive, lower-energy 24 V sensor interfaces. |
| 1.5SMC16A (Littelfuse) | Identical 1500 W rating, 16 V VRWM, and SMC package; minor VBR tolerance variance (19.7–21.5 V vs. 19.7–20.9 V). | Same mechanical fit and electrical function; UL 497B recognized but with different file number (E127673). | 1.5SMC16A is a direct form-fit-function alternative with identical board-level integration and qualification scope. |
Compared with SMBJ16A, 1SMC16AT3G delivers 2.5× higher surge energy margin for automotive load dump; versus 1.5SMC16A, it offers identical clamping performance with ON Semiconductor's validated Surmetic™ package reliability and traceable lot control for medical OEMs.
Availability
1SMC16AT3G is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O protection, and medical equipment power entry requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1SMC16AT3G 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 part of onsemi) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The 1SMC16AT3G belongs to the SMC-series transient voltage suppressors - engineered for high-reliability, high-energy clamping in harsh environments where UL 497B certification, low leakage, and sub-1 ns response are mandatory.
FAQ
What is the clamping voltage of the 1SMC16AT3G at its rated peak pulse current?
The 1SMC16AT3G has a maximum clamping voltage (VC) of 26 V when subjected to its rated peak pulse current (IPP) of 57.7 A under a 10/1000 µs waveform. This value is guaranteed across temperature and represents the highest voltage the protected circuit will experience during a full-rated surge event. The 1SMC16AT3G achieves this with low dynamic impedance, ensuring consistent clamping performance in automotive and industrial applications.
Is the 1SMC16AT3G certified for UL 497B isolated loop protection?
Yes, the 1SMC16AT3G is UL Recognized under standard UL 497B (File #116110, category QVGV2) for isolated loop circuit protection. This certification validates its suitability in telecom, medical, and industrial isolation barriers where transient immunity must be maintained across galvanic separation. The 1SMC16AT3G passed strike voltage breakdown, endurance conditioning, and dielectric withstand tests - not just flammability screening.
What is the thermal resistance from junction to ambient (RJA) for the 1SMC16AT3G?
The 1SMC16AT3G has a thermal resistance from junction to ambient (RJA) of 165 °C/W when mounted on an FR-4 board using ON Semiconductor's minimum recommended footprint. This value enables precise ambient-temperature-based derating - for example, at 75 °C ambient, the device's DC power dissipation must be reduced to 0.375 W. The 1SMC16AT3G's RJA directly informs heatsinking decisions in enclosed power supply designs.
Does the 1SMC16AT3G have bidirectional capability?
No, the 1SMC16AT3G is strictly unidirectional. Its datasheet explicitly states that bidirectional devices are not available in the SMC series. The 1SMC16AT3G conducts only when the cathode is biased positively relative to the anode beyond VRWM - making it ideal for protecting positive rails referenced to ground. For AC or dual-rail protection, a separate bidirectional TVS (e.g., 1SMC16CA) would be required, but that is a distinct part number not covered by the 1SMC16AT3G specification.
What is the maximum reverse leakage current for the 1SMC16AT3G at its working voltage?
The 1SMC16AT3G specifies a maximum reverse leakage current (IR) of 5 µA at its working peak reverse voltage (VRWM) of 16 V and TA = 25 °C. This ultra-low leakage ensures minimal standby power loss in always-on 24 V systems such as automotive ECUs or industrial sensors. Leakage remains well below 50 µA even at +125 °C, confirming stable operation across extended temperature ranges without compromising system efficiency.
1SMC16AT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AB, SMC
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- 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
1SMC16AT3G FAQ
1.How can I place an order for 1SMC16AT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMC16AT3G 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 1SMC16AT3G reliable?
The price and inventory of 1SMC16AT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMC16AT3G is usually 5 days.
3.What payment methods are accepted for 1SMC16AT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMC16AT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMC16AT3G?
1SMC16AT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMC16AT3G 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 1SMC16AT3G?
For technical support, including 1SMC16AT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMC16AT3G requirements.
6.How does Aetrix verify that 1SMC16AT3G is sourced from the original manufacturer or authorized distributors?
All 1SMC16AT3G 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 1SMC16AT3G meets industry standards.
7.What is the process for return or replacement of 1SMC16AT3G?
All 1SMC16AT3G units undergo pre-shipment inspection (PSI). If there is an issue with 1SMC16AT3G, 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 1SMC16AT3G part is unused and in its original packaging.
Return procedure for 1SMC16AT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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