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onsemi 1SMC6.0AT3
- Part No.:
- 1SMC6.0AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1SMC6.0AT3.pdf
- Description:
- TVS DIODE 6VWM 10.3VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:9,013
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Product details
Overview
1SMC6.0AT3 from ON Semiconductor is a unidirectional 1500 W peak power Zener transient voltage suppressor (TVS) diode designed for parallel clamping protection of sensitive electronics against ESD, lightning-induced surges, and inductive switching transients. It features a 6.0 V working peak reverse voltage (VRWM), 7.0 V typical breakdown voltage (VBR) at 10 mA, 10.3 V maximum clamping voltage (VC) at 145.6 A peak pulse current, and sub-1 ns response time. It is used in automotive power line protection and industrial DC power supply input stages.
For engineers reviewing the 1SMC6.0AT3 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM ≥ system operating voltage, VC margin relative to protected IC absolute maximum ratings, surge current capability under IEC 61000-4-5 waveform, UL 497B recognition for isolated loop circuits, and SMC package thermal performance on FR-4 PCBs.
Technical Context
The 1SMC6.0AT3 operates as a unidirectional Zener-clamp TVS diode with avalanche breakdown behavior. Its junction structure delivers low dynamic impedance (< 0.5 Ω typical), enabling tight voltage clamping during 8.3 ms half-sine transients up to 145.6 A. It exhibits < 5 µA leakage above 10 V and a temperature coefficient of ±0.05 %/°C for VBR stability across −65 °C to +150 °C.
Designed for surface-mount placement in high-energy surge paths, it relies on low-inductance layout-short traces, direct ground plane connection, and proximity to protected ICs-to minimize overshoot. Its Surmetic SMC package provides void-free molding, Pb-free terminations, and 260 °C solderability for reflow compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 6.0 V - Maximum continuous reverse voltage before significant leakage; must be ≥ nominal DC bus voltage (e.g., 5 V rail or 6 V automotive battery). |
| VBR @ IT=10 mA | 6.67 V (nominal) - Avalanche onset voltage; defines threshold where clamping begins under controlled test conditions. |
| VC @ IPP=145.6 A | 10.3 V - Maximum clamped voltage during 1 ms 1500 W surge; determines worst-case overvoltage seen by downstream ICs. |
| IPP | 145.6 A - Peak pulse current supported at 1 ms pulse width; correlates directly to IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge capability. |
| Response Time | < 1 ns - Time from transient onset to clamping initiation; ensures suppression before logic-level devices experience overstress. |
| Leakage Current | < 1000 µA @ VRWM - Low standby power loss and minimal impact on high-impedance signal lines or battery-powered circuits. |
| UL Recognition | UL 497B (QVGQ2 File #E210057) - Certified for isolated loop circuit protection, including strike voltage, endurance, and dielectric withstand testing. |
Pinout & Package
Package: SMC (Case 403−03), surface-mount plastic package with modified L-bend leads, cathode indicated by molded notch. Dimensions: 5.59–6.10 mm (D) × 6.60–7.11 mm (E) × 1.90–2.41 mm (A), 2.79–4.34 mm (L1) lead length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to system ground or lowest potential node; forms return path for surge current during clamping. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., +12 V rail); avalanche conduction occurs from cathode to anode when VRWM exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables robust protection against IEC 61000-4-5 4 kV/2 Ω surges without derating on standard FR-4 PCBs with minimum footprint. |
| ESD rating >16 kV HBM | Meets or exceeds IEC 61000-4-2 Level 4 (15 kV air/8 kV contact) for board-level ESD immunity without additional front-end filtering. |
| Low clamping ratio (VC/VBR ≈ 1.54) | Minimizes overvoltage margin required between protected IC's absolute max rating and system operating voltage. |
| Pb-free Surmetic SMC package | RoHS-compliant, void-free thermoset molding ensures long-term reliability and 260 °C reflow compatibility per JEDEC J-STD-020. |
| UL 497B certified | Validated for telecom and industrial isolated loop applications requiring recognized surge protector classification-not just flammability compliance. |
Applications
| Automotive Power Line Protection | Industrial DC Power Input Stage |
|---|---|
|
Use Scenario: Protecting engine control unit (ECU) 12 V supply inputs from load dump (ISO 7637-2 Pulse 5a) and jump-start transients. IC Role / Device Role: Unidirectional shunt clamp placed between battery rail and local regulator input. Use Value: Clamps 12 V line to ≤10.3 V during 145.6 A surges, preventing damage to 16 V-rated LDOs and microcontrollers. |
Use Scenario: Safeguarding programmable logic controller (PLC) 24 V DC input terminals against field-wiring induced surges and inductive kickback. IC Role / Device Role: Primary surge suppression device mounted at connector entry point, upstream of filtering and regulation. Use Value: Absorbs 1500 W transients while maintaining <1000 µA leakage, preserving accuracy of 24 V analog sensor interfaces. |
| Medical Equipment Isolated Data Lines | Telecom Power Feeding Circuits |
|
Use Scenario: Protecting RS-485 transceivers on isolated patient-monitoring module power rails compliant with UL 497B Class 2 circuits. IC Role / Device Role: UL-recognized TVS on secondary-side 3.3 V/5 V bias rails feeding isolated communication ICs. Use Value: UL 497B certification validates suitability for safety-critical isolated loops where failure could compromise patient isolation barriers. |
Use Scenario: Surge protection on PSE (Power Sourcing Equipment) outputs in IEEE 802.3af/at PoE systems handling up to 57 V DC feed voltage. IC Role / Device Role: Clamp device on powered device (PD) input, rated for 6.0 V VRWM to match internal LDO dropout margins. Use Value: Enables use of lower-cost 12 V-rated PD controllers by limiting input overvoltage to 10.3 V during Ethernet cable surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.0A | Lower peak power (400 W), smaller SMA package (lower thermal mass), higher VC (10.5 V @ 64.3 A). | Suitable for lower-energy IEC 61000-4-2 ESD and low-duty-cycle transients; not rated for IEC 61000-4-5 Level 4. | Select SMAJ6.0A only if surge energy is limited and PCB space is constrained; verify thermal dissipation on 2-layer boards. |
| 1.5SMC6.0A | Same SMC package and 1500 W rating, but legacy non-Pb-free construction and older revision (Rev. 4 vs Rev. 6); identical electrical specs. | No functional difference; differs only in RoHS compliance status and UL file documentation scope. | Choose 1.5SMC6.0A only if Pb-free requirement is waived and legacy qualification suffices; otherwise prefer 1SMC6.0AT3 for full UL 497B coverage. |
Compared with SMAJ6.0A and 1.5SMC6.0A, the 1SMC6.0AT3 uniquely combines 1500 W surge capability, UL 497B certification, Pb-free compliance, and Rev. 6 specification rigor-making it the preferred choice for automotive, industrial, and medical designs requiring validated high-energy protection.
Availability
1SMC6.0AT3 is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, medical monitoring equipment, and telecom power feeding circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1SMC6.0AT3 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, sensor, and discrete solutions for automotive, industrial, and communications markets.
The 1SMC6.0AT3 belongs to ON Semiconductor's SMC-series Zener TVS family, engineered specifically for high-reliability, high-energy transient suppression in harsh environments-including automotive load dump, industrial motor drive feedback, and medical isolated power rails.
FAQ
What is the maximum clamping voltage of the 1SMC6.0AT3 under surge conditions?
The 1SMC6.0AT3 has a maximum clamping voltage (VC) of 10.3 V when subjected to its rated peak pulse current of 145.6 A (1 ms, 10/1000 µs waveform). This value is guaranteed across temperature and represents the highest voltage that will appear across the protected line during a full-power transient event. The 1SMC6.0AT3 maintains this clamping performance due to its low dynamic impedance and optimized Zener junction design.
Is the 1SMC6.0AT3 suitable for bidirectional signal line protection?
No, the 1SMC6.0AT3 is a unidirectional TVS diode and is not suitable for bidirectional signal line protection such as USB or RS-232. Its cathode-anode polarity is fixed, and it conducts only during positive transients on the cathode side. For bidirectional applications, a dedicated bidirectional part like 1SMC6.0AT3G (not offered in this series) or a symmetric dual-diode array would be required. The 1SMC6.0AT3 datasheet explicitly states "Bidirectional devices will not be available in this series."
Does the 1SMC6.0AT3 meet UL 497B requirements for isolated loop protection?
Yes, the 1SMC6.0AT3 is UL 497B recognized under File #E210057 (QVGQ2 category) for isolated loop circuit protection. It passed all required tests including strike voltage breakdown, endurance conditioning, temperature cycling, dielectric withstand, and discharge verification-going beyond basic flammability compliance. This makes the 1SMC6.0AT3 appropriate for telecom interface circuits, medical isolated data links, and other safety-critical applications requiring certified surge protection.
What is the thermal resistance from junction-to-lead (RJL) for the 1SMC6.0AT3?
The 1SMC6.0AT3 has a thermal resistance from junction-to-lead (RJL) of 18.3 °C/W when mounted on a 1 in² copper pad on FR-4 board. This value enables effective heat transfer from the silicon junction to the PCB copper during repetitive surge events. At TL = 75 °C, the device supports 4.0 W DC power dissipation, derating linearly above that temperature. Proper PCB copper area and via stitching are essential to realize this thermal performance in actual layouts.
How does the 1SMC6.0AT3 compare to the 1SMC5.0AT3 in terms of working voltage and clamping performance?
The 1SMC6.0AT3 has a higher working peak reverse voltage (VRWM = 6.0 V) than the 1SMC5.0AT3 (VRWM = 5.0 V), making it better suited for 5.5–6.0 V systems where margin above nominal rail is needed. Its clamping voltage (10.3 V) is slightly higher than the 1SMC5.0AT3's 9.2 V, but it supports greater peak current (145.6 A vs 163 A) and maintains tighter VBR tolerance (6.4–7.0 V vs 5.8–6.4 V). Both share identical SMC packaging, UL 497B certification, and 1500 W rating.
1SMC6.0AT3 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):
- 6V
- Voltage - Breakdown (Min):
- 6.67V
- Voltage - Clamping (Max) @ Ipp:
- 10.3V
- Current - Peak Pulse (10/1000µs):
- 145.6A
- 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
1SMC6.0AT3 FAQ
1.How can I place an order for 1SMC6.0AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMC6.0AT3 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 1SMC6.0AT3 reliable?
The price and inventory of 1SMC6.0AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMC6.0AT3 is usually 5 days.
3.What payment methods are accepted for 1SMC6.0AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMC6.0AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMC6.0AT3?
1SMC6.0AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMC6.0AT3 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 1SMC6.0AT3?
For technical support, including 1SMC6.0AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMC6.0AT3 requirements.
6.How does Aetrix verify that 1SMC6.0AT3 is sourced from the original manufacturer or authorized distributors?
All 1SMC6.0AT3 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 1SMC6.0AT3 meets industry standards.
7.What is the process for return or replacement of 1SMC6.0AT3?
All 1SMC6.0AT3 units undergo pre-shipment inspection (PSI). If there is an issue with 1SMC6.0AT3, 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 1SMC6.0AT3 part is unused and in its original packaging.
Return procedure for 1SMC6.0AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMC6.0AT3 Tags
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