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onsemi 1SMC60AT3
- Part No.:
- 1SMC60AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1SMC60AT3.pdf
- Description:
- TVS DIODE 60VWM 96.8VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,727
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Product details
Overview
1SMC60AT3 from ON Semiconductor is a unidirectional 1500 W peak power Zener transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, with 60 V working peak reverse voltage (VRWM), 73.7 V maximum clamping voltage at 15.5 A peak pulse current, and <1 ns response time. It protects sensitive DC power rails and signal lines in industrial power supplies and automotive ECUs against ESD and lightning-induced surges.
For engineers reviewing the 1SMC60AT3 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM ≥ system operating voltage, VC margin relative to IC absolute maximum ratings, UL 497B certification for isolated loop protection, and thermal derating above 75°C ambient.
Technical Context
The 1SMC60AT3 operates as a unidirectional avalanche diode, conducting only during negative transients on the cathode side. Its clamping behavior is defined by a 1 ms 10/1000 µs waveform, with guaranteed breakdown voltage of 66.7–73.7 V at 1 A test current and low zener impedance enabling fast energy diversion.
It features Pb-free Surmetic™ packaging with modified L-bend leads for robust solder joint reliability, rated for 260°C reflow (10 s), and meets Class 3 ESD immunity (>16 kV HBM). No bidirectional variants exist in this series.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Power | 1500 W @ 1 ms pulse - handles high-energy lightning surges per IEC 61000-4-5 Level 4 |
| VRWM | 60 V - selected to protect 48 V nominal DC systems without false triggering |
| VBR (min/max) | 66.7 V / 73.7 V @ 1 A - ensures reliable turn-on above steady-state voltage with margin |
| VC @ IPP | 96.8 V @ 15.5 A - defines worst-case clamped voltage seen by downstream ICs |
| Leakage Current | <5 µA @ 60 V - negligible standby power loss in always-on circuits |
| Response Time | <1 ns - limits voltage overshoot before clamping engages |
| UL Recognition | UL 497B QVGQ2 - certified for isolated loop circuit protection in telecom and industrial interfaces |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, void-free thermosetting plastic case (Case 403), cathode indicated by molded notch. Dimensions: 5.59–6.10 mm × 6.60–7.11 mm × 1.90–2.41 mm (L×W×H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current return path | Connected to ground or low-impedance return plane; must minimize trace inductance to reduce overshoot |
| Cathode | Protected line connection | Connected to the line being protected (e.g., 48 V rail); polarity notch identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W surge rating | Enables single-device protection against IEC 61000-4-5 4 kV/2 Ω combination wave without cascaded stages |
| UL 497B certification | Validates performance in safety-critical isolated loop applications such as RS-485 fieldbus interfaces |
| Low clamping ratio (VC/VBR ≈ 1.46) | Reduces voltage stress on protected ICs compared to higher-ratio TVS devices |
| Pb-free Surmetic™ package | Meets RoHS and J-STD-020 reflow requirements with 260°C/10 s soldering tolerance |
| ESD Class 3 (>16 kV HBM) | Provides board-level ESD immunity without requiring additional discrete ESD protection |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) CAN Bus Line Protection |
|---|---|
Use Scenario: 48 V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between +48 V rail and chassis ground to clamp transients before they reach DC-DC converter ICs. Use Value: 96.8 V clamping voltage ensures protected buck controller (e.g., LM5116) remains below its 100 V abs max rating during 15.5 A surge events. | Use Scenario: CAN_H line in BCM subjected to ESD events and battery transients during vehicle jump-start. IC Role / Device Role / Timing Role: Cathode tied to CAN_H, anode to ground; clamps positive-going spikes while preserving CAN differential signaling integrity. Use Value: <1 ns response prevents >10 V overshoot that could disrupt CAN transceiver (e.g., TJA1042) common-mode range during fast ESD events. |
| Medical Equipment Isolated Sensor Interface | Telecom Remote Terminal Unit (RTU) Ethernet Port Protection |
Use Scenario: 24 V isolated analog sensor supply in patient-monitoring device requiring UL 497B compliance. IC Role / Device Role / Timing Role: TVS on secondary-side 24 V output of isolated DC-DC converter, referenced to isolated ground. Use Value: UL 497B recognition validates safe operation in medically isolated circuits where creepage/clearance and failure mode are safety-critical. | Use Scenario: PoE-powered RTU with RJ45 interface exposed to lightning-induced surges on data pairs. IC Role / Device Role / Timing Role: Paired unidirectional TVS diodes (e.g., 1SMC60AT3 on each data line) referenced to local ground, upstream of Ethernet magnetics. Use Value: 1500 W rating supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-to-ground) without thermal runaway under repeated stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ60A | 600 W peak power, same VRWM and VC, SMB package (smaller footprint) | Lower surge capacity; suitable for consumer-grade equipment with lower threat levels | Select when board space is constrained and IEC 61000-4-5 Level 3 (2 kV) suffices |
| 1.5SMC60A | Same 1500 W rating but legacy non-Pb-free SMC package; identical electrical specs | No UL 497B recognition; lacks Class 3 ESD rating | Acceptable only for non-certified internal industrial modules where RoHS and UL are not mandated |
Compared with SMBJ60A and 1.5SMC60A, the 1SMC60AT3 provides certified UL 497B isolation protection and Class 3 ESD immunity in a Pb-free package-critical for medical, telecom, and automotive designs requiring regulatory compliance and long-term supply stability.
Availability
1SMC60AT3 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, medical sensor interfaces, and telecom remote terminal units requiring stable component supply across extended product lifecycles.
Supply support for 1SMC60AT3 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 supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The 1SMC60AT3 belongs to the SMC-series Zener TVS family, engineered specifically for high-reliability transient suppression in harsh environments where UL certification, surge robustness, and thermal stability are mandatory.
FAQ
What is the maximum clamping voltage of the 1SMC60AT3 at its rated peak pulse current?
The 1SMC60AT3 has a maximum clamping voltage (VC) of 96.8 V at its rated peak pulse current (IPP) of 15.5 A, measured using the standard 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during a full-power transient event and must be verified against the absolute maximum ratings of downstream components like DC-DC controllers or interface ICs.
Is the 1SMC60AT3 suitable for bidirectional transient protection?
No, the 1SMC60AT3 is strictly unidirectional and conducts only when the cathode is driven positive relative to the anode. Bidirectional protection requires separate devices or a dedicated bidirectional TVS. The datasheet explicitly states "Bidirectional devices will not be available in this series," confirming no symmetrical clamping capability exists for the 1SMC60AT3.
Does the 1SMC60AT3 meet UL 497B requirements for isolated loop protection?
Yes, the entire 1SMC5.0AT3 series-including the 1SMC60AT3-is UL Recognized under file #E210057 for protector classification per UL 497B. This certification covers performance in isolated loop circuits, including passing strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge tests-making it appropriate for RS-485, CAN, and other isolated communication interfaces.
What is the thermal resistance from junction-to-lead (RJL) for the 1SMC60AT3?
The 1SMC60AT3 has a thermal resistance from junction-to-lead (RJL) of 18.3 °C/W, measured with zero lead length on a 1 in² copper pad (FR-4 board). This parameter governs heat dissipation during repetitive surge events and informs PCB layout decisions-such as copper pour area and via count-to maintain junction temperature below 150°C under sustained duty cycles.
How does the 1SMC60AT3 differ from the older 1.5SMC60A in terms of compliance and packaging?
The 1SMC60AT3 uses a Pb-free Surmetic™ package compliant with RoHS and JEDEC J-STD-020 reflow standards (260°C/10 s), whereas the 1.5SMC60A is a legacy non-Pb-free variant. Additionally, the 1SMC60AT3 carries UL 497B recognition and Class 3 ESD rating (>16 kV HBM), which are not documented for the 1.5SMC60A-making the 1SMC60AT3 the compliant choice for new designs requiring regulatory approval.
1SMC60AT3 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):
- 60V
- Voltage - Breakdown (Min):
- 66.7V
- Voltage - Clamping (Max) @ Ipp:
- 96.8V
- Current - Peak Pulse (10/1000µs):
- 15.5A
- 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
1SMC60AT3 FAQ
1.How can I place an order for 1SMC60AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMC60AT3 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 1SMC60AT3 reliable?
The price and inventory of 1SMC60AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMC60AT3 is usually 5 days.
3.What payment methods are accepted for 1SMC60AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMC60AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMC60AT3?
1SMC60AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMC60AT3 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 1SMC60AT3?
For technical support, including 1SMC60AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMC60AT3 requirements.
6.How does Aetrix verify that 1SMC60AT3 is sourced from the original manufacturer or authorized distributors?
All 1SMC60AT3 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 1SMC60AT3 meets industry standards.
7.What is the process for return or replacement of 1SMC60AT3?
All 1SMC60AT3 units undergo pre-shipment inspection (PSI). If there is an issue with 1SMC60AT3, 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 1SMC60AT3 part is unused and in its original packaging.
Return procedure for 1SMC60AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMC60AT3 Tags
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