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onsemi 1.5SMC6.8AT3
- Part No.:
- 1.5SMC6.8AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC6.8AT3.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,985
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Product details
Overview
1.5SMC6.8AT3 from ON Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) diode designed for parallel overvoltage protection of DC power rails and signal lines. It features a 6.8 V nominal Zener breakdown voltage, 10.5 V maximum clamping voltage at 143 A peak pulse current, and <1.0 ns response time-optimized for safeguarding automotive ECUs, industrial power supplies, and communication interface circuits against ESD and lightning-induced surges.
For engineers reviewing the 1.5SMC6.8AT3 datasheet, pinout, applications, or equivalent options, key selection criteria include working peak reverse voltage (5.8 V), clamping performance under 1 ms 10/1000 μs transients, UL 497B certification for isolated loop protection, and AEC-Q101 qualification for automotive deployment.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: it remains high-impedance below VRWM (5.8 V), then avalanches sharply at VBR (6.45–7.14 V @ 10 mA) to divert surge current away from downstream circuitry. Its low dynamic impedance (<0.057 Ω typical) and fast turn-on ensure minimal overshoot during sub-nanosecond transients.
The device uses a planar Zener junction in an SMC (DO-214AB) surface-mount package with modified L-bend leads, enabling robust 200 A forward surge capability and 165 °C/W junction-to-ambient thermal resistance on standard FR-4 PCBs. It is Pb-free, RoHS-compliant, and rated for −65 °C to +150 °C operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W @ 1.0 ms 10/1000 μs waveform - sustains single high-energy surges without failure |
| Working Peak Reverse Voltage | 5.8 V - sets minimum operating rail voltage threshold before clamping activates |
| Clamping Voltage | 10.5 V @ 143 A IPP - limits protected node voltage during worst-case surge |
| Zener Breakdown Voltage | 6.45–7.14 V @ 10 mA IT - defines precise avalanche onset range for design margining |
| Response Time | <1.0 ns - ensures suppression initiates before transient energy damages IC inputs |
| ESD Rating | Class 3 (>16 kV HBM) - meets IEC 61000-4-2 Level 4 for system-level ESD immunity |
| UL Recognition | UL 497B (QVGQ2 File #E210057) - certified for isolated loop circuit protection in telecom and industrial systems |
Pinout & Package
Package: SMC (DO-214AB), case 403, surface-mount, Pb-free, void-free thermosetting plastic body with cathode-indicating 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 lead length (L1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes shunt path during avalanche conduction |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 5 V rail); polarity notch identifies this terminal for correct PCB placement |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood and ECU applications per stress test requirements |
| UL 497B recognition | Approved for use in isolated loop protectors-exceeds basic flammability-only certifications |
| Low clamping ratio | VC/VBR ≈ 1.54 (10.5 V / 6.8 V) - minimizes voltage stress on protected ICs during surge events |
| High surge current rating | 143 A peak pulse current - handles IEC 61000-4-5 Level 4 (4 kV, 2 Ω coupling) surges |
| Thermal robustness | 150 °C max junction temperature with 75 °C derating - supports continuous operation in enclosed enclosures |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input |
|---|---|
|
Use Scenario: Protects 5 V CAN transceiver power pins against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed directly at transceiver VCC pin. Use Value: Clamps transients to ≤10.5 V within 1 ns, preventing latch-up or permanent damage to transceiver silicon. |
Use Scenario: Shields 24 V digital input optocoupler front-end from field-wiring induced surges. IC Role / Device Role / Timing Role: Parallel-connected TVS across input terminals, upstream of series current-limiting resistor. Use Value: Limits voltage excursion to safe levels during 1 kV/500 A surge tests per IEC 61000-4-5, preserving isolation barrier integrity. |
| Medical Patient Monitor Power Rail | Telecom DSL Line Interface |
|
Use Scenario: Guards isolated 3.3 V logic supply in battery-backed patient monitoring units. IC Role / Device Role / Timing Role: Secondary protection stage after primary fuse and common-mode choke. Use Value: UL 497B certification validates compliance with medical equipment surge safety standards for isolated subsystems. |
Use Scenario: Suppresses longitudinal surges on POTS line pairs entering DSLAM line cards. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices per line pair, referenced to isolated ground plane. Use Value: 1500 W peak power rating enables survival of repeated lightning-induced surges up to 10/1000 μs waveform. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8A | Lower peak power (600 W), same VRWM (5.8 V), identical SMC footprint but SMB package (smaller size) | Not suitable for 1500 W surge environments; limited to lower-energy IEC 61000-4-2/4-5 test levels | Select only when board space is constrained and surge threat level is ≤600 W |
| 1.5KE6.8A | Same electrical specs but axial-leaded DO-201AD package; no surface-mount compatibility | Requires through-hole assembly; incompatible with automated SMT lines and high-density layouts | Choose only for prototyping or legacy through-hole designs where rework is acceptable |
Compared with SMBJ6.8A and 1.5KE6.8A, the 1.5SMC6.8AT3 delivers full 1500 W surge handling in an SMT-optimized package with AEC-Q101 and UL 497B validation-making it the only choice for production automotive and certified industrial systems requiring both high power and regulatory compliance.
Availability
1.5SMC6.8AT3 is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, and medical power supply designs requiring stable component supply, long-term lifecycle support, and certified surge protection performance.
Supply support for 1.5SMC6.8AT3 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 components for automotive, industrial, and communications markets.
The 1.5SMC6.8AT3 belongs to ON Semiconductor's SMC-series transient voltage suppressors-engineered specifically for high-reliability, high-power surge protection in harsh environments where AEC-Q101 qualification and UL 497B certification are mandatory.
FAQ
What is the working peak reverse voltage (VRWM) of the 1.5SMC6.8AT3?
The 1.5SMC6.8AT3 has a working peak reverse voltage (VRWM) of 5.8 V. This value defines the maximum continuous DC or peak AC voltage the device can withstand without entering avalanche conduction. It ensures reliable blocking during normal operation while allowing fast clamping when transients exceed this threshold. Designers must select VRWM ≥ system operating voltage to prevent false triggering.
Does the 1.5SMC6.8AT3 meet automotive qualification standards?
Yes, the 1.5SMC6.8AT3 is AEC-Q101 qualified and PPAP capable. It undergoes rigorous stress testing-including temperature cycling, humidity bias, and surge endurance-to validate reliability in automotive under-hood and ECU applications. The "SZ" prefix variant (SZ1.5SMC6.8AT3G) explicitly denotes automotive-grade traceability and control change requirements.
What is the maximum clamping voltage of the 1.5SMC6.8AT3 at its rated peak pulse current?
The 1.5SMC6.8AT3 exhibits a maximum clamping voltage (VC) of 10.5 V at its rated peak pulse current (IPP) of 143 A, measured under the standard 10/1000 μs waveform. This clamping performance ensures protected circuit nodes remain below critical voltage thresholds during high-energy transients, preserving functionality of downstream ICs such as microcontrollers and interface transceivers.
Is the 1.5SMC6.8AT3 certified for UL 497B isolated loop protection?
Yes, the entire 1.5SMC6.8AT3G/SZ1.5SMC6.8AT3G series carries UL 497B recognition (File #E210057, category QVGQ2). This certification confirms successful completion of strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge testing-validating its suitability for protecting isolated data loops in telecom, industrial automation, and medical systems.
What package type does the 1.5SMC6.8AT3 use, and what are its key mechanical features?
The 1.5SMC6.8AT3 uses the SMC (DO-214AB) surface-mount package, case 403, with dimensions 5.59–6.10 mm (D) × 6.60–7.11 mm (E) × 1.90–2.41 mm (A). Key features include a cathode-indicating molded notch, modified L-bend leads for enhanced solder joint area, void-free thermosetting plastic body, and Pb-free/RoHS compliance. It supports 260°C reflow for 10 seconds.
1.5SMC6.8AT3 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):
- 5.8V
- Voltage - Breakdown (Min):
- 6.45V
- Voltage - Clamping (Max) @ Ipp:
- 10.5V
- Current - Peak Pulse (10/1000µs):
- 143A
- 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
1.5SMC6.8AT3 FAQ
1.How can I place an order for 1.5SMC6.8AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC6.8AT3 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 1.5SMC6.8AT3 reliable?
The price and inventory of 1.5SMC6.8AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC6.8AT3 is usually 5 days.
3.What payment methods are accepted for 1.5SMC6.8AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC6.8AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC6.8AT3?
1.5SMC6.8AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC6.8AT3 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 1.5SMC6.8AT3?
For technical support, including 1.5SMC6.8AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC6.8AT3 requirements.
6.How does Aetrix verify that 1.5SMC6.8AT3 is sourced from the original manufacturer or authorized distributors?
All 1.5SMC6.8AT3 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 1.5SMC6.8AT3 meets industry standards.
7.What is the process for return or replacement of 1.5SMC6.8AT3?
All 1.5SMC6.8AT3 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC6.8AT3, 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 1.5SMC6.8AT3 part is unused and in its original packaging.
Return procedure for 1.5SMC6.8AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC6.8AT3 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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