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onsemi 1SMC5.0AT3
- Part No.:
- 1SMC5.0AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1SMC5.0AT3.pdf
- Description:
- TVS DIODE 5VWM 9.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,240
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Product details
Overview
1SMC5.0AT3 from ON Semiconductor is a unidirectional 1500 W peak power Zener transient voltage suppressor (TVS) designed for parallel clamping protection of sensitive electronics against ESD, lightning-induced surges, and inductive switching transients. It features a 5.0 V working peak reverse voltage (VRWM), 6.7 V minimum breakdown voltage (VBR) at 10 mA test current, 9.2 V maximum clamping voltage (VC) at 163 A peak pulse current, and sub-1 ns response time. It is widely deployed in DC power input stages of industrial power supplies and automotive ECUs.
For engineers reviewing the 1SMC5.0AT3 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM matching system operating voltage, VC margin relative to protected IC absolute maximum ratings, surge current capability under 1 ms 10/1000 µs waveform, UL 497B certification for isolated loop protection, and SMC package thermal performance on FR-4 PCBs.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal bias it presents <5 µA leakage above 10 V; when transient voltage exceeds VBR (~6.7–7.0 V), it avalanches into low-impedance conduction, limiting voltage across the load to ≤9.2 V at 163 A. Its unidirectional polarity requires cathode connection to the protected line and anode to ground.
The SMC (Case 403) surface-mount package delivers 54.6 °C/W junction-to-lead thermal resistance and supports 260 °C soldering for 10 seconds. It is Pb-free, AEC-Q101 qualified (SZ-prefix variant), and UL 497B recognized for isolated loop circuit protection - critical for telecom and automotive signal/power interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 5.0 V - Maximum continuous reverse operating voltage; must be ≥ system DC rail to avoid leakage-triggered conduction |
| VBR @ IT=10 mA | 6.4–7.0 V - Breakdown onset range; defines turn-on threshold under standardized DC test conditions |
| VC @ IPP=163 A | 9.2 V - Clamped voltage during 1 ms 10/1000 µs surge; determines maximum stress on downstream ICs |
| PPK | 1500 W - Peak pulse power handling per non-repetitive 1 ms surge; defines single-event robustness |
| Response Time | <1 ns - Avalanche turn-on delay; enables suppression before fast transients damage CMOS inputs |
| Leakage Current | <1000 µA @ VRWM - Low standby loss; critical for battery-powered or high-impedance sensor nodes |
| UL Recognition | UL 497B (QVGQ2 File #E210057) - Validated for isolated loop protection; meets telecom safety compliance |
Pinout & Package
Package: SMC (Case 403), surface-mount, Pb-free, void-free thermosetting plastic with modified L-bend leads and molded cathode notch polarity indicator. Dimensions: 5.59–6.10 mm (D) × 6.60–7.11 mm (E) × 1.90–2.41 mm (A), 0.76–1.27 mm lead length (L).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node / Ground return path | Connected to system ground plane; carries full surge current back to source; must minimize trace inductance |
| Cathode | Protected line interface | Connected to the line being safeguarded (e.g., +5 V rail); avalanche conduction occurs from cathode to anode |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV surge) without degradation when properly mounted on 1 in² copper pad |
| Clamping ratio (VC/VBR) | ≤1.38 - Tight voltage control ensures protected ICs remain within safe operating area during surge events |
| ESD rating | Class 3 (>16 kV HBM) - Eliminates need for upstream discrete ESD diodes in many USB/UART interfaces |
| Thermal robustness | RJL = 54.6 °C/W - Enables reliable operation at TL = 75 °C with 4.0 W DC dissipation on standard PCB layout |
| AEC-Q101 qualification | SZ1SMC5.0AT3G variant available - Required for automotive body control modules and infotainment power rails |
Applications
| Industrial Power Supply Input | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: 5 V microcontroller supply rail exposed to load dump and jump-start transients in 12 V vehicle systems. IC Role / Device Role: Unidirectional shunt TVS placed between 5 V rail and chassis ground. Use Value: Clamps surges to ≤9.2 V, protecting MCU GPIOs and regulators rated for 6.5 V absolute max, while surviving 163 A pulses per ISO 7637-2 Pulse 5a. |
Use Scenario: CAN transceiver VCC pin subjected to ESD and coupled noise from adjacent high-current solenoid drivers. IC Role / Device Role: Local rail clamp adjacent to transceiver, minimizing PCB trace inductance. Use Value: Sub-1 ns response prevents ESD-induced latch-up; UL 497B recognition validates use in isolated CAN bus protection circuits. |
| Medical Equipment AC/DC Adapter Interface | Point-of-Sale Terminal USB Port Protection |
Use Scenario: Secondary-side 5 V output of medical-grade AC/DC adapter vulnerable to conducted surges from mains input. IC Role / Device Role: Final-stage overvoltage clamp before patient-connected subsystems. Use Value: UL 497B certification confirms suitability for isolated loop protection per IEC 60601-1; low leakage avoids affecting precision analog front-ends. |
Use Scenario: USB VBUS line in retail kiosks exposed to frequent hot-plug ESD and cable discharge events. IC Role / Device Role: Primary-level TVS on VBUS, upstream of USB controller's internal protection. Use Value: 16 kV HBM rating exceeds IEC 61000-4-2 Level 4; 9.2 V clamping prevents VBUS overvoltage from resetting connected peripherals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SZ1SMC5.0AT3G | AEC-Q101 qualified, SZ prefix denotes automotive-grade process control and PPAP documentation support; identical electrical specs and SMC package | Required for automotive OEM designs needing PPAP submission and zero-defect reliability tracking | Select SZ1SMC5.0AT3G when automotive qualification, extended temperature validation (−65 °C to +150 °C), or change control traceability is mandatory |
| SMBJ5.0A | Lower peak power (600 W), smaller SMB package (Case 415), higher clamping voltage (10.8 V @ 54.5 A), same VRWM and VBR range | Suitable for space-constrained consumer electronics where 1500 W surge immunity is not required | Choose SMBJ5.0A only if board area is critical and surge threat level is limited to IEC 61000-4-5 Level 2 (2 kV); not drop-in due to lower IPP and higher VC |
Compared with 1SMC5.0AT3, SZ1SMC5.0AT3G adds automotive qualification overhead but guarantees process stability for mission-critical systems, while SMBJ5.0A trades surge capacity and clamping performance for compactness - making it unsuitable as a direct replacement in industrial or automotive 1500 W surge environments.
Availability
1SMC5.0AT3 is available at Aetrix Electronics and suitable for industrial power supplies, automotive electronic control units, and medical AC/DC adapters requiring stable component supply with consistent surge performance and UL-certified protection.
Supply support for 1SMC5.0AT3 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 logic solutions for automotive, industrial, and communications markets.
The 1SMC5.0AT3 belongs to the SMC-series Zener TVS family, engineered for high-energy transient suppression in harsh environments - emphasizing robust clamping, fast response, and regulatory compliance for safety-critical power and interface protection.
FAQ
What is the maximum clamping voltage of the 1SMC5.0AT3 under a 163 A surge?
The 1SMC5.0AT3 has a maximum clamping voltage (VC) of 9.2 V when subjected to its rated peak pulse current of 163 A under the standard 1 ms 10/1000 µs waveform. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on the protected circuit during worst-case surge events. Designers must ensure all downstream components tolerate at least 9.2 V transient exposure.
Is the 1SMC5.0AT3 suitable for bidirectional signal line protection?
No, the 1SMC5.0AT3 is strictly unidirectional and intended for DC rail protection only. Its cathode-anode polarity means it conducts only when the cathode is positive relative to the anode. For bidirectional lines such as RS-485 or USB D+/D−, a dedicated bidirectional TVS like SMBJ5.0CA must be used - the 1SMC5.0AT3 will not suppress negative-going transients.
Does the 1SMC5.0AT3 meet automotive qualification standards?
The base 1SMC5.0AT3 is not AEC-Q101 qualified; however, its automotive-grade variant SZ1SMC5.0AT3G is fully AEC-Q101 qualified and PPAP capable. Both share identical electrical specifications and SMC package, but only SZ1SMC5.0AT3G undergoes extended temperature cycling, humidity testing, and process control validation required for automotive ECUs.
What is the thermal resistance from junction to ambient for the 1SMC5.0AT3 on a standard PCB?
The 1SMC5.0AT3 has a junction-to-ambient thermal resistance (RJA) of 165 °C/W when mounted on an FR-4 board using ON Semiconductor's minimum recommended footprint. This value assumes no added copper pour; adding a 1 in² copper pad reduces RJA significantly and is required to sustain its 4.0 W DC power dissipation rating at TL = 75 °C.
How does UL 497B recognition benefit designs using the 1SMC5.0AT3?
UL 497B recognition confirms the 1SMC5.0AT3 meets rigorous safety requirements for protectors in isolated loop circuits - including strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge testing. This certification eliminates the need for additional external isolation validation in telecom, industrial fieldbus, and medical isolated power applications.
1SMC5.0AT3 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):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9.2V
- Current - Peak Pulse (10/1000µs):
- 163A
- 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
1SMC5.0AT3 FAQ
1.How can I place an order for 1SMC5.0AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMC5.0AT3 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 1SMC5.0AT3 reliable?
The price and inventory of 1SMC5.0AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMC5.0AT3 is usually 5 days.
3.What payment methods are accepted for 1SMC5.0AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMC5.0AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMC5.0AT3?
1SMC5.0AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMC5.0AT3 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 1SMC5.0AT3?
For technical support, including 1SMC5.0AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMC5.0AT3 requirements.
6.How does Aetrix verify that 1SMC5.0AT3 is sourced from the original manufacturer or authorized distributors?
All 1SMC5.0AT3 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 1SMC5.0AT3 meets industry standards.
7.What is the process for return or replacement of 1SMC5.0AT3?
All 1SMC5.0AT3 units undergo pre-shipment inspection (PSI). If there is an issue with 1SMC5.0AT3, 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 1SMC5.0AT3 part is unused and in its original packaging.
Return procedure for 1SMC5.0AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMC5.0AT3 Tags
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DESD3V3E1BL-7B
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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