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onsemi 1SMB60AT3G
- Part No.:
- 1SMB60AT3G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1SMB60AT3G.pdf
- Description:
- TVS DIODE 60VWM 96.8VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:19,588
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Product details
Overview
1SMB60AT3G from ON Semiconductor is a unidirectional 600 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 60 V working peak reverse voltage (VRWM), 96.8 V maximum clamping voltage at 6.2 A peak pulse current (VC @ IPP), and <1.0 ns response time. It is widely deployed in industrial power supplies and automotive ECUs where robust overvoltage immunity is required.
For engineers reviewing the 1SMB60AT3G datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin relative to protected IC rail voltage, peak pulse current handling under IEC 61000-4-5 surge waveforms, thermal derating at elevated ambient temperatures, and UL 497B recognition for isolated loop circuit protection.
Technical Context
The 1SMB60AT3G operates as a voltage-clamped shunt protector: when transient voltage exceeds its breakdown threshold (66.7–73.7 V at 1 mA), it rapidly avalanches into low-impedance conduction to divert surge current away from downstream circuitry. Its design relies on controlled Zener avalanche characteristics rather than snapback or thyristor-based triggering.
It delivers 600 W peak pulse power (10/1000 µs waveform), supports 100 A non-repetitive forward surge current (8.3 ms half-sine), and maintains <5 µA leakage at VRWM. Thermal performance is defined by 226 °C/W junction-to-ambient resistance on FR-4 board with minimum footprint, requiring careful PCB copper area planning for sustained surge duty cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 60 V - Maximum continuous reverse operating voltage before clamping begins; must exceed system DC bus or signal rail voltage. |
| VBR (min/typ/max) | 66.7 / 70.2 / 73.7 V @ 1 mA - Confirmed Zener breakdown range ensures predictable turn-on across temperature and unit variation. |
| VC @ IPP | 96.8 V @ 6.2 A - Clamping voltage during full-rated 600 W transient; defines worst-case overvoltage seen by protected load. |
| PPK | 600 W - Peak pulse power rating per 10/1000 µs waveform; determines survivability against IEC 61000-4-5 Level 4 surges. |
| Response Time | <1.0 ns - Enables suppression before fast-rising transients (e.g., ESD) damage CMOS inputs or communication interfaces. |
| Leakage Current | <5.0 µA @ 60 V - Negligible standby power loss and minimal impact on high-impedance sensor or reference circuits. |
| UL Recognition | UL 497B QVGQ2 - Certified for use in isolated loop protectors; validates dielectric withstand, endurance, and strike voltage performance. |
Pinout & Package
1SMB60AT3G uses the SMB (DO-214AA) surface-mount package (Case 403A), featuring a modified L-bend leadform for enhanced solder joint reliability and cathode polarity indicated by a band. The package is void-free, thermosetting plastic with corrosion-resistant finishes and Pb-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during reverse-biased clamping | Connected to ground or low-impedance return path; carries full surge current during transient events. |
| Cathode | High-side connection to protected line | Connected directly to the voltage rail or signal line being protected; establishes VRWM and VBR reference. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables single-device protection against IEC 61000-4-5 4 kV surge tests without external current sharing. |
| ESD rating >16 kV HBM | Meets or exceeds IEC 61000-4-2 Level 4 (15 kV contact) for system-level ESD robustness without additional shielding. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage stress on protected ICs-critical for 3.3 V or 5 V logic rails with tight absolute maximum ratings. |
| UL 497B recognition | Validates suitability for telecom and industrial isolated loop applications where safety certification is mandatory. |
| Pb-free SURMETIC™ package | Complies with RoHS and JEDEC J-STD-020 reflow profiles up to 260 °C for 10 s, supporting automated assembly. |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Protecting 24 V DC input stage of programmable logic controller (PLC) power supply against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt TVS diode placed directly across input terminals to clamp transients before they reach upstream rectifier and bulk capacitor. Use Value: Limits voltage to ≤96.8 V during 6.2 A surge, preventing MOSFET gate oxide rupture and electrolytic capacitor overvoltage failure. |
Use Scenario: Safeguarding LIN bus transceiver pins in BCM against battery disconnect spikes and ESD events in vehicle cabin environments. IC Role / Device Role / Timing Role: Unidirectional TVS connected between LIN line and ground, leveraging fast <1 ns response to suppress sub-100 ns ESD pulses. Use Value: Maintains signal integrity below LIN physical layer's 40 V absolute max rating while adding <5 µA leakage at 24 V nominal operation. |
| Medical Equipment Input Stage | Telecom Isolated Data Interface |
|
Use Scenario: Shielding AC/DC adapter input of patient monitor from mains-borne surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary-stage TVS mounted at AC inlet PCB edge, coordinated with MOV and fuse for staged protection. Use Value: UL 497B recognition confirms compliance for medical-grade isolated loop protection, reducing certification effort. |
Use Scenario: Protecting RS-485 transceiver I/O pins in base station backhaul equipment exposed to lightning-induced ground potential differences. IC Role / Device Role / Timing Role: Bidirectional protection not required-unidirectional 1SMB60AT3G used on powered side (VCC-referenced) of isolated interface. Use Value: 600 W rating handles multi-kA induced surges across isolation barrier; low capacitance (300 pF) avoids signal edge degradation at 10 Mbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ60A | Same VRWM (60 V) and VC (96.8 V), but lower PPK (400 W); SMA package (smaller footprint, higher thermal resistance). | Limited to lower-energy transients (IEC 61000-4-5 Level 3); unsuitable for automotive load dump where 600 W is mandated. | Select 1SMB60AT3G when 600 W surge handling or UL 497B certification is required; SMAJ60A only where space constraints dominate and energy levels are lower. |
| SMCJ60A | Higher PPK (1500 W), same VRWM/VC, larger SMC package (Case 403D); 3× the PCB area and 2.5× thermal mass. | Over-engineered for most 24 V industrial systems; justified only in high-reliability aerospace or railway applications with extreme surge exposure. | Choose 1SMB60AT3G for optimal balance of surge capability, size, and cost in standard industrial and automotive designs; reserve SMCJ60A for mission-critical surge zones. |
Compared with SMAJ60A, the 1SMB60AT3G provides 50% higher peak power and UL 497B recognition in an SMB footprint; versus SMCJ60A, it delivers certified 600 W protection in 40% less board area-making it the preferred choice for space-constrained, standards-compliant 24 V system protection.
Availability
1SMB60AT3G is available at Aetrix Electronics and suitable for industrial power supplies, automotive electronic control units, and medical device input stages requiring stable component supply, long-term lifecycle support, and certified surge immunity.
Supply support for 1SMB60AT3G 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 management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud power markets.
The 1SMB60AT3G belongs to the SMB-series transient voltage suppressor family, engineered specifically for high-reliability clamping in harsh electromagnetic environments-including automotive, industrial automation, and medical equipment where UL-certified surge protection is mandatory.
FAQ
What is the maximum clamping voltage of the 1SMB60AT3G under rated surge conditions?
The 1SMB60AT3G has a maximum clamping voltage (VC) of 96.8 V when subjected to its rated peak pulse current of 6.2 A (10/1000 µs waveform). This value is measured per the test conditions specified in the ON Semiconductor datasheet and represents the worst-case voltage imposed on protected circuitry during a full 600 W transient event. Designers must ensure this clamping level remains below the absolute maximum voltage rating of downstream components.
Is the 1SMB60AT3G suitable for bidirectional signal line protection?
No, the 1SMB60AT3G is a unidirectional TVS diode and is not suitable for bidirectional signal lines such as USB, RS-232, or CAN without additional circuitry. It conducts only during reverse-bias overvoltage events and blocks forward current above ~3.5 V. For bidirectional protection, a dedicated bidirectional TVS like 1SMB60AT3 or SMDA60 must be used instead of the 1SMB60AT3G.
Does the 1SMB60AT3G meet AEC-Q101 requirements for automotive use?
The 1SMB60AT3G itself is not AEC-Q101 qualified; however, the SZ1SMB60AT3G variant-identical in electrical specs but with automotive-specific traceability and process controls-is AEC-Q101 qualified and PPAP capable. Engineers designing for automotive applications must specify SZ1SMB60AT3G, not 1SMB60AT3G, to meet qualification requirements.
What is the junction-to-ambient thermal resistance (RJA) of the 1SMB60AT3G on a standard FR-4 board?
The 1SMB60AT3G has a junction-to-ambient thermal resistance (RJA) of 226 °C/W when mounted on an FR-4 board using ON Semiconductor's minimum recommended footprint. This value assumes no added copper pour; designers must increase copper area or add thermal vias to reduce RJA if operating near maximum power dissipation limits at elevated ambient temperatures.
How does the UL 497B recognition benefit system-level certification of equipment using the 1SMB60AT3G?
The UL 497B recognition for the 1SMB60AT3G validates its performance as a protector in isolated loop circuits-including dielectric withstand, endurance under repeated surges, and strike voltage stability. This pre-certification reduces the burden of system-level testing, accelerates end-product safety approvals (e.g., UL 61010), and eliminates need for redundant component-level validation in industrial and telecom applications.
1SMB60AT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- 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):
- 6.2A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 300pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
1SMB60AT3G FAQ
1.How can I place an order for 1SMB60AT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMB60AT3G 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 1SMB60AT3G reliable?
The price and inventory of 1SMB60AT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMB60AT3G is usually 5 days.
3.What payment methods are accepted for 1SMB60AT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMB60AT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMB60AT3G?
1SMB60AT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMB60AT3G 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 1SMB60AT3G?
For technical support, including 1SMB60AT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMB60AT3G requirements.
6.How does Aetrix verify that 1SMB60AT3G is sourced from the original manufacturer or authorized distributors?
All 1SMB60AT3G 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 1SMB60AT3G meets industry standards.
7.What is the process for return or replacement of 1SMB60AT3G?
All 1SMB60AT3G units undergo pre-shipment inspection (PSI). If there is an issue with 1SMB60AT3G, 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 1SMB60AT3G part is unused and in its original packaging.
Return procedure for 1SMB60AT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMB60AT3G Tags
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onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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