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onsemi 1SMB60CAT3G
- Part No.:
- 1SMB60CAT3G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1SMB60CAT3G.pdf
- Description:
- TVS DIODE 60VWM 96.8VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:1,500
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Product details
Overview
1SMB60CAT3G from ON Semiconductor is a bidirectional 600 W peak power Zener transient voltage suppressor (TVS) designed for parallel overvoltage protection of sensitive electronics. It features a 60 V working peak reverse voltage (VRWM), 66.7–73.72 V breakdown voltage (VBR @ 1 mA), clamps to ≤96.8 V at 6.2 A peak pulse current, and responds in <1 ns. It is widely deployed in industrial power supplies and automotive ECUs to absorb lightning-induced surges and ESD events.
For engineers reviewing the 1SMB60CAT3G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, UL 497B-certified surge protection capability, SMB package mechanical data, and validated alternatives for robust circuit hardening against transients up to 600 W.
Technical Context
The 1SMB60CAT3G operates as a bidirectional Zener-based TVS diode, leveraging avalanche breakdown to clamp both positive and negative transients symmetrically. Its low zener impedance and fast sub-nanosecond response enable effective suppression of ESD (Class 3, >16 kV HBM) and lightning surges (10/1000 µs waveform).
It is rated for 600 W non-repetitive peak pulse power at 1 ms, with thermal derating to 0.55 W at TA = 25 °C and junction-to-ambient thermal resistance of 226 °C/W. The device meets UL 497B for isolated loop circuit protection and is Pb-free, packaged in ON Semiconductor's SURMETIC™ SMB (Case 403C) surface-mount housing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W @ 1 ms (10/1000 µs waveform); sustains single high-energy surges without failure |
| Working Peak Reverse Voltage (VRWM) | 60 V; maximum continuous DC or peak AC voltage the device blocks before clamping |
| Breakdown Voltage (VBR) | 66.7–73.72 V @ 1 mA; defines onset of avalanche conduction under transient stress |
| Clamping Voltage (VC) | ≤96.8 V @ 6.2 A IPP; maximum voltage seen by protected circuit during worst-case surge |
| Leakage Current (IR) | <5 µA @ 60 V; ensures minimal standby power loss and signal integrity in high-impedance circuits |
| Junction Capacitance (Ctyp) | 150 pF @ 0 V, 1 MHz; low enough for <100 Mbps data lines but requires layout care above 10 MHz |
| ESD Rating | Class 3 (>16 kV) per Human Body Model; qualifies for direct I/O port protection in unshielded environments |
Pinout & Package
1SMB60CAT3G is a two-terminal bidirectional TVS diode housed in an SMB (DO-214AA) surface-mount package (Case 403C), with no polarity marking. The package features void-free thermosetting plastic, corrosion-resistant finish, and modified L-bend leads for enhanced solder joint reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (non-polarized) | Transient conduction path (bidirectional) | Both terminals function identically; connects across protected line and return-no orientation required |
| Cathode Band (not present) | Polarity indicator | Absent per datasheet; device is symmetrical and unmarked-eliminates assembly errors |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Zener clamping | Protects AC-coupled or floating lines (e.g., RS-485, CAN bus, sensor bridges) without polarity constraints |
| UL 497B recognition (QVGQ2) | Validated for isolated loop protection in telecom and industrial control-exceeds basic flammability requirements |
| 600 W surge rating with <1 ns response | Clamps lightning-induced transients before downstream ICs experience overstress (e.g., MCU I/O, ADC inputs) |
| Pb-free SURMETIC™ SMB package | RoHS-compliant, reflow-solderable (260 °C/10 s), with optimized thermal path for PCB heat dissipation |
| AEC-Q101 qualified (SZ variant) | Qualified for automotive underhood applications-1SMB60CAT3G shares process and qualification baseline |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protecting 48 V DC input rails in programmable logic controllers (PLCs) against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor placed at board edge, clamping surges before they reach DC-DC converters and microcontrollers. Use Value: Limits rail voltage to ≤96.8 V during 6.2 A transients, preventing latch-up or gate oxide damage in downstream 65 V-rated MOSFETs and regulators. |
Use Scenario: Safeguarding LIN bus transceivers and door module sensors against battery reversal and jump-start surges. IC Role / Device Role / Timing Role: Bidirectional TVS mounted directly at connector pins to shunt ±100 V transients within nanoseconds. Use Value: Maintains signal integrity on 19.2 kbps LIN lines while surviving >16 kV ESD and 10/1000 µs load dump pulses per ISO 7637-2. |
| Medical Imaging Equipment Interface | Telecom DSL Line Card Protection |
Use Scenario: Shielding analog front-end amplifiers in ultrasound probe interfaces from ESD events during clinical handling. IC Role / Device Role / Timing Role: Low-capacitance (150 pF) TVS placed adjacent to op-amp inputs to prevent input stage saturation or damage. Use Value: Clamps 8 kV contact ESD to <97 V without distorting µV-level echo signals-verified per IEC 61000-4-2 Level 4. |
Use Scenario: Protecting ADSL2+ line drivers and splitters from induced surges on outdoor copper pairs. IC Role / Device Role / Timing Role: Primary protection device in UL 497B-compliant circuit, upstream of gas discharge tube (GDT) secondary protection. Use Value: Absorbs first 600 W surge energy, enabling GDT to handle follow-on current-meets GR-1089-CORE telecom immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SZ1SMB60CAT3G | AEC-Q101 qualified, PPAP-capable, identical electrical specs and SMB package | Required for automotive production programs needing certified change control and traceability | Select when automotive qualification (e.g., Tier 1 BOM) or extended temperature validation (−65 °C to +150 °C) is mandatory |
| SMBJ60A | Unidirectional, 60 V VRWM, same 600 W rating but asymmetric clamping (only protects positive transients) | Suitable only for DC-biased lines where reverse polarity is not expected (e.g., 12 V supply rails) | Choose only if circuit topology guarantees unidirectional surge exposure and polarity is fixed |
Compared with 1SMB60CAT3G, SZ1SMB60CAT3G adds automotive qualification without altering performance, while SMBJ60A trades bidirectionality for marginally lower capacitance (140 pF) but cannot protect AC or floating nodes-making 1SMB60CAT3G the sole choice for full-spectrum surge hardening.
Availability
1SMB60CAT3G is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, medical imaging interfaces, and telecom line cards requiring stable component supply and UL-recognized transient protection.
Supply support for 1SMB60CAT3G 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 infrastructure markets.
1SMB60CAT3G belongs to the SMB-series transient voltage suppressors-a family engineered for high-surge robustness in harsh environments, with emphasis on UL 497B compliance, fast response, and surface-mount reliability.
FAQ
What is the clamping voltage of the 1SMB60CAT3G at its rated peak pulse current?
The 1SMB60CAT3G clamps to a maximum of 96.8 V at its specified peak pulse current of 6.2 A (10/1000 µs waveform). This value is guaranteed per the datasheet's Electrical Characteristics table and represents the upper limit of voltage imposed on protected circuitry during a worst-case surge event. Designers use this parameter to verify that downstream components remain within their absolute maximum voltage ratings when the 1SMB60CAT3G is active.
Is the 1SMB60CAT3G bidirectional or unidirectional?
The 1SMB60CAT3G is explicitly a bidirectional TVS diode, as confirmed by its "CA" suffix (denoting bidirectional Zener construction) and symmetric electrical specifications (e.g., identical VRWM, VBR, and VC for both polarities). Unlike unidirectional variants such as SMBJ60A, the 1SMB60CAT3G provides equal surge suppression for positive and negative transients-essential for AC-coupled, floating, or differential signal lines.
Does the 1SMB60CAT3G meet UL 497B certification?
Yes, the entire 1SMBxxCAT3G series-including the 1SMB60CAT3G-is UL Recognized under standard UL 497B (File #E210057, category QVGQ2) for protectors in isolated loop circuits. This certification covers rigorous testing including strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge performance-going beyond basic package flammability to validate functional surge protection capability.
What is the thermal resistance and power derating behavior of the 1SMB60CAT3G?
The 1SMB60CAT3G has a junction-to-ambient thermal resistance (RJA) of 226 °C/W and a DC power dissipation rating of 0.55 W at TA = 25 °C, derating linearly by 4.4 mW/°C above that temperature. Its 600 W peak pulse rating applies only to non-repetitive 1 ms events at TL = 25 °C; sustained or repetitive surges require strict adherence to the derating curves in Figure 3 of the datasheet to avoid thermal runaway.
Can the 1SMB60CAT3G be used as a direct replacement for the SMBJ60A?
No-the 1SMB60CAT3G is not a direct replacement for the SMBJ60A due to fundamental functional differences: SMBJ60A is unidirectional, while 1SMB60CAT3G is bidirectional. Swapping them without circuit review risks inadequate protection on reverse-polarity transients. If bidirectional operation is required, 1SMB60CAT3G is appropriate; if only positive surges occur and lower capacitance is critical, SMBJ60A may be preferred-but the 1SMB60CAT3G must not be assumed drop-in compatible.
1SMB60CAT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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:
- 150pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
1SMB60CAT3G FAQ
1.How can I place an order for 1SMB60CAT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMB60CAT3G 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 1SMB60CAT3G reliable?
The price and inventory of 1SMB60CAT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMB60CAT3G is usually 5 days.
3.What payment methods are accepted for 1SMB60CAT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMB60CAT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMB60CAT3G?
1SMB60CAT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMB60CAT3G 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 1SMB60CAT3G?
For technical support, including 1SMB60CAT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMB60CAT3G requirements.
6.How does Aetrix verify that 1SMB60CAT3G is sourced from the original manufacturer or authorized distributors?
All 1SMB60CAT3G 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 1SMB60CAT3G meets industry standards.
7.What is the process for return or replacement of 1SMB60CAT3G?
All 1SMB60CAT3G units undergo pre-shipment inspection (PSI). If there is an issue with 1SMB60CAT3G, 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 1SMB60CAT3G part is unused and in its original packaging.
Return procedure for 1SMB60CAT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMB60CAT3G Tags
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onsemi
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