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onsemi 1.5SMC16AT3
- Part No.:
- 1.5SMC16AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- -
- Datasheet:
-
1.5SMC16AT3.pdf
- Description:
- TVS 1500W 16V UNIDIRECT SMC
- Quantity:
- Payment:
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Inventory:5,491
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Product details
Overview
1.5SMC16AT3 from ON Semiconductor is a unidirectional 1500 W peak power transient voltage suppressor (TVS) diode designed for parallel clamping protection of sensitive electronics against ESD, lightning surges, and inductive switching transients. It features a 13.6 V working peak reverse voltage (VRWM), 16 V breakdown voltage (VBR) at 1 mA test current, 22.5 V maximum clamping voltage (VC) at 67 A peak pulse current (IPP), and <5 µA leakage above VRWM. It is commonly deployed in automotive power line protection and industrial DC power supply inputs.
For engineers reviewing the 1.5SMC16AT3 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, thermal derating above 75°C, and UL 497B recognition for isolated loop circuit protection.
Technical Context
The 1.5SMC16AT3 operates as a silicon avalanche diode with fast turn-on response (<1 ns) and low dynamic impedance, enabling effective suppression of sub-microsecond transients. Its unidirectional configuration provides reverse-biased clamping only - forward conduction is limited to standard diode behavior below 3.5 V.
It is rated for 1500 W non-repetitive peak pulse power (10/1000 µs waveform), with thermal resistance from junction to lead (RJL) of 54.6 °C/W and junction-to-ambient (RJA) of 165 °C/W on FR-4 board using minimum recommended footprint. Derating begins above 75°C for lead temperature and above 25°C for ambient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W @ 1 ms, 10/1000 µs waveform - supports IEC 61000-4-5 Level 4 surge immunity testing |
| Working Peak Reverse Voltage (VRWM) | 13.6 V - must exceed continuous DC operating voltage of protected line to avoid leakage-induced power loss |
| Breakdown Voltage (VBR) | 16 V @ 1 mA - defines onset of avalanche conduction; ±5% tolerance ensures predictable clamping threshold |
| Clamping Voltage (VC) | 22.5 V @ 67 A IPP - maximum voltage seen by downstream circuit during full-rated surge event |
| Leakage Current (IR) | <5 µA @ 13.6 V - negligible standby power draw in always-on systems like automotive ECUs |
| ESD Rating | Class 3 (>16 kV HBM) - exceeds IEC 61000-4-2 Level 4 for system-level ESD robustness |
| UL Recognition | UL 497B (QVGV2 File #116110) - certified for use in isolated loop telecom and industrial signal conditioning |
Pinout & Package
Package: SMC (Surface Mount Case 403), void-free thermosetting plastic with modified L-bend leads, cathode indicated by molded notch. Dimensions: 7.75 × 6.10 × 2.41 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward bias / surge clamp reference | Connected to ground or low-impedance return path; determines polarity of clamping action |
| Cathode | Current exit terminal during reverse avalanche conduction | Connected to protected line (e.g., 12 V rail); clamps voltage to VC when transient exceeds VRWM |
Key Features
| Feature | Design Value |
|---|---|
| Low Clamping Ratio | VC/VBR = 22.5/16 = 1.41 - tighter than typical 1.5–1.7 ratio, reducing stress on downstream ICs |
| Fast Response Time | <1 ns - enables suppression before transient energy couples into sensitive analog or digital circuitry |
| High Surge Robustness | 67 A IPP - withstands repeated 10/1000 µs surges up to 1500 W without parameter shift |
| Thermal Reliability | RJL = 54.6 °C/W - allows high-power dissipation with minimal junction temperature rise when soldered to copper pad |
| Industry Certification | UL 497B recognized - validated for safety-critical isolated loop protection in medical and telecom equipment |
Applications
| Automotive Power Line Protection | Industrial DC Power Input |
|---|---|
Use Scenario: 12 V battery-fed ECU input subjected to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between +12 V rail and chassis ground to clamp transients above 13.6 V. Use Value: Limits voltage to ≤22.5 V during 67 A surge, protecting downstream LDOs and microcontrollers rated for 28 V absolute max. | Use Scenario: 24 V industrial PLC power input exposed to inductive kickback from solenoid drivers. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing energy from 10/1000 µs surges induced by relay coil de-energization. Use Value: Dissipates 1500 W peak without failure, maintaining system uptime where replacement downtime incurs production loss. |
| Telecom Isolated Loop Interface | Medical Equipment Signal Conditioning |
Use Scenario: 4–20 mA current loop interface in base station remote units subject to lightning-induced surges. IC Role / Device Role / Timing Role: UL 497B-certified TVS across loop terminals to protect precision DACs and op-amps. Use Value: Meets isolation barrier requirements while limiting transient voltage to safe levels for Class I equipment. | Use Scenario: Patient-connected sensor front-end in diagnostic imaging device requiring low-leakage, certified overvoltage protection. IC Role / Device Role / Timing Role: Low-IR TVS (≤5 µA @ 13.6 V) guarding analog signal paths from ESD events during handling. Use Value: Prevents false triggering or damage to high-impedance amplifiers without introducing offset or noise via leakage current. |
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 | 600 W peak power, same VRWM (13.6 V), lower IPP (33.3 A), SMB package (smaller footprint) | Lower surge capacity; suitable for consumer-grade or space-constrained designs with reduced threat level | Select SMBJ16A only if system-level surge testing is limited to IEC 61000-4-2 ESD and minor inductive spikes. |
| 1.5KE16A | Through-hole DO-201 package, identical electrical specs (VRWM=13.6 V, VC=22.5 V, IPP=67 A), higher RJA | Requires PCB through-holes; better heat sinking in high-ambient environments but incompatible with SMT-only assembly | Choose 1.5KE16A when legacy board design mandates axial/DO-201 mounting or thermal mass outweighs assembly efficiency. |
Compared with SMBJ16A and 1.5KE16A, the 1.5SMC16AT3 delivers optimal balance of 1500 W surge capability, SMT compatibility, UL 497B certification, and low-profile SMC packaging - making it preferred for new automotive and industrial designs requiring high-reliability surface-mount TVS protection.
Availability
1.5SMC16AT3 is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC power inputs, telecom loop interfaces, and medical sensor front-ends requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC16AT3 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, sensors, and discrete devices for automotive, industrial, and cloud power applications.
The 1.5SMC16AT3 belongs to the SMC-series transient voltage suppressors - engineered for high-energy surge clamping in harsh environments where reliability, UL certification, and consistent avalanche performance are critical.
FAQ
What is the clamping voltage of the 1.5SMC16AT3 under maximum rated surge current?
The 1.5SMC16AT3 has a maximum clamping voltage (VC) of 22.5 V when subjected to its rated peak pulse current (IPP) of 67 A, measured using the standard 10/1000 µs double-exponential waveform. This value is guaranteed per ON Semiconductor's datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case transient events. The 1.5SMC16AT3 maintains this clamping performance across its specified operating temperature range.
Is the 1.5SMC16AT3 suitable for bidirectional transient protection?
No, the 1.5SMC16AT3 is a unidirectional TVS diode and provides clamping only in reverse bias - it does not suppress positive transients on grounded lines. For bidirectional protection, a separate device such as the 1.5SMC16CA (center-tapped, bidirectional variant) is required. The 1.5SMC16AT3 datasheet explicitly states that bidirectional devices are not available in this series, and its marking (16A) and pinout confirm unidirectional polarity.
What is the thermal resistance and derating behavior of the 1.5SMC16AT3?
The 1.5SMC16AT3 has a junction-to-lead thermal resistance (RJL) of 54.6 °C/W and junction-to-ambient (RJA) of 165 °C/W on FR-4 with ON Semiconductor's recommended footprint. DC power dissipation derates linearly above 75°C lead temperature (4.0 W at 75°C → 0 W at 150°C), and ambient-derated power drops from 0.75 W at 25°C to zero at 150°C. These values are critical for ensuring long-term reliability in enclosed or high-ambient environments.
Does the 1.5SMC16AT3 meet UL 497B certification, and what does that mean for system design?
Yes, the 1.5SMC16AT3 carries UL 497B recognition (File #116110, QVGV2 category) for isolated loop circuit protection. This certification validates its performance in dielectric withstand, endurance conditioning, and strike voltage breakdown tests - allowing direct use in safety-critical telecom, medical, and industrial isolation barriers without additional system-level validation. The 1.5SMC16AT3 is one of few TVS diodes with full UL 497B listing across its entire voltage range.
How does the leakage current of the 1.5SMC16AT3 impact low-power applications?
The 1.5SMC16AT3 exhibits ≤5 µA reverse leakage current at its 13.6 V working peak reverse voltage (VRWM), measured at 25°C. This ultra-low leakage ensures minimal standby power drain in battery-operated or energy-harvesting systems - for example, adding less than 0.1 mW to a 20 V rail. Leakage remains within specification up to +150°C, supporting reliable operation in automotive under-hood environments where the 1.5SMC16AT3 is frequently deployed.
1.5SMC16AT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- -
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- -
- Unidirectional Channels:
- -
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- -
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- -
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
1.5SMC16AT3 FAQ
1.How can I place an order for 1.5SMC16AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC16AT3 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 1.5SMC16AT3 reliable?
The price and inventory of 1.5SMC16AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC16AT3 is usually 5 days.
3.What payment methods are accepted for 1.5SMC16AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC16AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC16AT3?
1.5SMC16AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC16AT3 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 1.5SMC16AT3?
For technical support, including 1.5SMC16AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC16AT3 requirements.
6.How does Aetrix verify that 1.5SMC16AT3 is sourced from the original manufacturer or authorized distributors?
All 1.5SMC16AT3 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 1.5SMC16AT3 meets industry standards.
7.What is the process for return or replacement of 1.5SMC16AT3?
All 1.5SMC16AT3 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC16AT3, 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 1.5SMC16AT3 part is unused and in its original packaging.
Return procedure for 1.5SMC16AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC16AT3 Tags
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