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onsemi 1.5SMC13AT3
- Part No.:
- 1.5SMC13AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC13AT3.pdf
- Description:
- TVS DIODE 11.1VWM 18.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,172
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Product details
Overview
1.5SMC13AT3 from ON Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) diode designed for parallel clamping protection of sensitive electronics against ESD, lightning, and inductive switching surges. It features a 11.1 V working peak reverse voltage (VRWM), 13 V breakdown voltage (VBR) at 1 mA test current, 18.2 V clamping voltage (VC) at 82 A peak pulse current, and sub-1 ns response time. It is commonly deployed in automotive power line protection and industrial DC power supply inputs.
For engineers reviewing the 1.5SMC13AT3 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin over operating voltage, VC vs. protected IC absolute maximum rating, surge current handling (IPP = 82 A), UL 497B certification for isolated loop circuits, and SMC package thermal performance under repetitive transients.
Technical Context
The 1.5SMC13AT3 operates as a silicon avalanche diode with sharp Zener-type breakdown characteristics, enabling fast clamping during transient events. Its unidirectional polarity supports DC-biased protection paths where reverse conduction must be blocked until clamping threshold is exceeded.
It delivers 1500 W peak pulse power (10/1000 µs waveform) with low dynamic impedance (<0.22 Ω typical), ensuring minimal overshoot when placed close to protected circuitry. Thermal resistance from junction to lead is 18.3 °C/W, supporting high-energy dissipation without thermal runaway under single-pulse conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 11.1 V - Maximum continuous reverse voltage before leakage exceeds 5 µA; sets minimum system operating voltage margin. |
| VBR @ IT=1 mA | 12.4–13.7 V - Breakdown range defining turn-on threshold; ensures reliable activation above nominal rail. |
| VC @ IPP=82 A | 18.2 V - Clamped voltage during full-rated surge; must stay below protected device's absolute max rating. |
| IPP | 82 A - Peak pulse current capability (10/1000 µs); determines survivability against IEC 61000-4-5 Level 4 surges. |
| Response Time | <1 ns - Enables suppression before downstream ICs experience overstress; critical for high-speed interfaces. |
| ESD Rating | >16 kV HBM - Meets IEC 61000-4-2 Level 4; suitable for front-end ports exposed to human contact. |
| UL Recognition | UL 497B (QVGV2) - Certified for isolated loop circuit protection; validates reliability in telecom and industrial safety-critical systems. |
Pinout & Package
1.5SMC13AT3 is housed in the SMC (DO-214AB) surface-mount plastic package (Case 403), featuring a modified L-bend lead form for enhanced solder joint reliability and void-free transfer-molded construction rated for 260°C/10 s reflow. Polarity is marked by a molded cathode notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node in unidirectional clamp configuration. |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 12 V rail); conducts during overvoltage to shunt energy to ground. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Supports robust protection against IEC 61000-4-5 4th-level surges (2 Ω source, 12 A) on 12 V systems. |
| Clamping ratio VC/VBR ≈ 1.4 | Ensures tight voltage control during clamping-critical for protecting 16 V-tolerant automotive MCUs and CAN transceivers. |
| Low leakage <5 µA @ VRWM | Minimizes standby power loss in battery-backed or always-on industrial sensors and controllers. |
| Surmetic™ package reliability | Void-free molding and corrosion-resistant finish ensure long-term stability in humid, high-vibration environments (e.g., engine control units). |
| Temperature coefficient 0.081 %/°C | Predictable VBR drift across –65°C to +150°C; enables accurate derating in under-hood automotive applications. |
Applications
| Automotive Power Line Protection | Industrial DC Power Input |
|---|---|
|
Use Scenario: 12 V battery feed line in engine control module subjected to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role: Unidirectional TVS clamp placed between battery rail and primary DC/DC converter input. Use Value: Limits transient voltage to ≤18.2 V, preventing damage to 20 V-rated buck controller ICs while maintaining <5 µA leakage at 12 V nominal. |
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) exposed to inductive kickback from solenoid drivers. IC Role / Device Role: Primary surge suppression element upstream of EMI filter and input rectifier. Use Value: Absorbs 82 A pulses without degradation, verified per UL 497B for isolated loop integrity in safety-rated industrial networks. |
| Medical Equipment Power Supply | Telecom Interface Protection |
|
Use Scenario: Auxiliary 5 V/12 V rails in patient-monitoring devices requiring low-leakage, certified surge protection. IC Role / Device Role: Secondary-level clamping after primary MOV, ensuring precise voltage limiting near sensitive analog front-ends. Use Value: Delivers <1 ns response and >16 kV HBM ESD immunity-meeting IEC 60601-1-2 requirements for applied parts. |
Use Scenario: RS-485 data line power rail (VCC) in base station remote radio units exposed to lightning-induced surges. IC Role / Device Role: DC rail protector adjacent to isolated DC/DC converter powering interface ICs. Use Value: UL 497B recognition confirms suitability for telecom isolated loop circuits; 18.2 V clamping protects 20 V-tolerant transceivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ13A | Lower peak power (600 W), same VRWM (11.1 V), slightly higher VC (21.5 V @ 27.5 A) | Not rated for IEC 61000-4-5 Level 4; suitable only for lower-energy threats (e.g., board-level ESD) | Select when space-constrained SMB package is required and surge threat level is limited to IEC 61000-4-2 or low-duty-cycle transients. |
| 1.5KE13A | Through-hole TO-204AA (DO-201AE) package, identical electrical specs but higher thermal resistance (RJA = 190 °C/W) | Lacks UL 497B certification; not approved for isolated loop telecom or medical applications | Choose only for legacy through-hole designs where rework to SMD is impractical and safety certification is not mandated. |
Compared with SMBJ13A and 1.5KE13A, the 1.5SMC13AT3 uniquely combines 1500 W surge capacity, UL 497B listing, and SMC surface-mount reliability-making it the preferred choice for new automotive, industrial, and certified medical power designs requiring high-energy, standards-compliant protection.
Availability
1.5SMC13AT3 is available at Aetrix Electronics and suitable for automotive power line protection, industrial DC power input stages, and medical equipment power supplies requiring stable component supply, traceable sourcing, and lifecycle continuity.
Supply support for 1.5SMC13AT3 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, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The 1.5SMC13AT3 belongs to the SMC-series transient voltage suppressors-a family engineered for high-reliability, high-power surge protection in harsh environments, with emphasis on automotive-grade robustness and safety-standard compliance.
FAQ
What is the clamping voltage of the 1.5SMC13AT3 at its rated peak pulse current?
The 1.5SMC13AT3 has a maximum clamping voltage (VC) of 18.2 V at its rated peak pulse current (IPP) of 82 A, measured using the standard 10/1000 µs double-exponential waveform. This value is guaranteed across temperature and ensures predictable voltage limiting during surge events. The 1.5SMC13AT3 maintains this clamping performance with low dynamic impedance, making it suitable for protecting 20 V-tolerant components in automotive and industrial systems.
Is the 1.5SMC13AT3 suitable for bidirectional signal line protection?
No, the 1.5SMC13AT3 is a unidirectional TVS diode and is not suitable for bidirectional signal line protection such as USB or RS-485 data lines. Its design allows conduction only from cathode to anode during overvoltage events, blocking reverse current flow. For bidirectional protection, a dedicated bidirectional TVS like the 1.5SMC13CA must be used. The 1.5SMC13AT3 is intended for DC power rail clamping where polarity is fixed.
Does the 1.5SMC13AT3 meet UL 497B requirements for isolated loop circuit protection?
Yes, the 1.5SMC13AT3 carries UL 497B recognition (File #116110, Category QVGV2) for isolated loop circuit protection. This certification covers testing for strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge performance-validating its use in telecom, industrial automation, and medical isolation barriers. The 1.5SMC13AT3 is explicitly listed in ON Semiconductor's UL-certified SMC series documentation.
What is the thermal resistance from junction to ambient for the 1.5SMC13AT3 in standard PCB mounting?
The 1.5SMC13AT3 has a thermal resistance from junction to ambient (RJA) of 165 °C/W when mounted on a FR-4 board using ON Semiconductor's recommended minimum footprint (per Case 403 outline). This value assumes no additional copper pour or thermal vias. For sustained or repetitive surge conditions, derating per Figure 3 in the datasheet is required-especially above 25°C ambient-to avoid exceeding the 0.75 W DC power dissipation limit.
How does the 1.5SMC13AT3 compare to the 1.5SMC13A variant?
The 1.5SMC13AT3 and 1.5SMC13A share identical electrical specifications-including VRWM (11.1 V), VBR (12.4–13.7 V), and VC (18.2 V)-but differ in packaging and reel format. The "T3" suffix indicates tape-and-reel packaging on a 13-inch reel (2500 units/reel), optimized for automated SMT assembly. The base 1.5SMC13A may denote bulk or alternate reel sizes. Functionally and electrically, the 1.5SMC13AT3 performs identically to 1.5SMC13A in circuit operation.
1.5SMC13AT3 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):
- 11.1V
- Voltage - Breakdown (Min):
- 12.4V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 82A
- 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
1.5SMC13AT3 FAQ
1.How can I place an order for 1.5SMC13AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC13AT3 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 1.5SMC13AT3 reliable?
The price and inventory of 1.5SMC13AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC13AT3 is usually 5 days.
3.What payment methods are accepted for 1.5SMC13AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC13AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC13AT3?
1.5SMC13AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC13AT3 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 1.5SMC13AT3?
For technical support, including 1.5SMC13AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC13AT3 requirements.
6.How does Aetrix verify that 1.5SMC13AT3 is sourced from the original manufacturer or authorized distributors?
All 1.5SMC13AT3 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 1.5SMC13AT3 meets industry standards.
7.What is the process for return or replacement of 1.5SMC13AT3?
All 1.5SMC13AT3 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC13AT3, 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 1.5SMC13AT3 part is unused and in its original packaging.
Return procedure for 1.5SMC13AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC13AT3 Tags
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DESD3V3E1BL-7B
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Diodes Incorporated
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