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onsemi 1SMB6.0AT3
- Part No.:
- 1SMB6.0AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- -
- Datasheet:
-
1SMB6.0AT3.pdf
- Description:
- TVS DIODE 6V 10.3V SMB
- Quantity:
- Payment:
- Shipping:
Inventory:7,262
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Product details
Overview
1SMB6.0AT3 from ON Semiconductor is a unidirectional 600 W peak power Zener transient voltage suppressor (TVS) designed for parallel overvoltage protection of sensitive electronics. It features a 6.0 V working peak reverse voltage (VRWM), 10.3 V clamping voltage (VC) at 10 A peak pulse current (IPP), and sub-1 ns response time - deployed in power supplies, automotive ECUs, and industrial control I/O interfaces.
For engineers reviewing the 1SMB6.0AT3 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM matching system DC bus voltage, VC margin relative to IC absolute maximum ratings, UL 497B certification for isolated loop protection, and SMB package thermal performance under repetitive surge conditions.
Technical Context
The 1SMB6.0AT3 operates as a silicon avalanche diode with Zener breakdown behavior, triggered when reverse voltage exceeds its 6.7–7.0 V breakdown range (VBR @ IT = 10 mA). Its low zener impedance and fast junction response enable effective clamping of ESD (Class 3 >16 kV HBM) and lightning-induced transients per IEC 61000-4-2/5.
Thermal design relies on junction-to-lead resistance (RJL = 25 °C/W) and 75 °C derated DC power dissipation (PD = 3.0 W). Mounting on FR-4 with minimum recommended footprint ensures rated 600 W peak power handling for 1 ms 10/1000 µs waveform pulses without thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 6.0 V - Maximum continuous reverse operating voltage before clamping begins; must exceed circuit's nominal DC rail. |
| VBR @ IT=10 mA | 6.7–7.0 V - Verified avalanche onset range; defines minimum trigger threshold under standardized test current. |
| VC @ IPP=10 A | 10.3 V - Clamped voltage during 10 A transient; determines maximum stress imposed on protected downstream ICs. |
| PPK | 600 W - Peak pulse power rating for 1 ms 10/1000 µs waveform; defines single-event surge energy absorption capability. |
| IR @ VRWM | 800 µA - Reverse leakage at 6.0 V; low enough to avoid measurable loading on high-impedance bias networks. |
| Ctyp @ 0 V, 1 MHz | 2300 pF - Junction capacitance affecting high-frequency signal integrity; relevant for data line protection near USB or RS-485. |
| Response Time | < 1.0 ns - Time from transient onset to conduction; ensures suppression occurs before vulnerable logic thresholds are exceeded. |
Pinout & Package
Package: SMB (Case 403A), surface-mount, void-free thermosetting plastic with modified L-bend leads and cathode polarity band. Dimensions: 4.32 mm × 3.56 mm × 2.20 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during clamping | Connected to ground or low-impedance return path; carries full surge current during transient events. |
| Cathode | Protected line connection | Connected to the line being protected (e.g., +12 V rail); polarity band identifies this terminal visually. |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition (QVGQ2) | Validated for isolated loop circuit protection - enables use in telecom interface circuits requiring safety agency approval. |
| ESD Rating Class 3 (>16 kV HBM) | Withstands human-body-model discharges without degradation - suitable for front-panel connectors and exposed I/O ports. |
| Low Clamping Ratio (VC/VBR ≈ 1.5) | Minimizes overvoltage margin between breakdown and clamp - improves protection headroom for 5 V or 3.3 V logic rails. |
| SURMETIC™ Package | ON Semiconductor's proprietary molded plastic housing offering enhanced moisture resistance and solderability vs. standard SMB. |
| Lead Temperature Limit | 260 °C for 10 s - compatible with standard lead-free reflow profiles without delamination or bond damage. |
Applications
| Automotive Power Distribution | Industrial PLC Digital Inputs |
|---|---|
Use Scenario: Protecting 12 V supply lines in engine control units against load dump spikes up to 40 V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and local regulator input. Use Value: Limits transient voltage to ≤10.3 V, preventing damage to 16 V-rated LDOs and microcontroller power pins. |
Use Scenario: Shielding 24 V digital input channels from inductive kickback generated by solenoid drivers. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor across optocoupler input terminals. Use Value: Absorbs 600 W surges within 1 ns, maintaining signal integrity and avoiding false triggering of input latching logic. |
| Medical Equipment Power Rails | AC-DC Adapter Secondary Side |
Use Scenario: Safeguarding isolated 5 V logic rails in patient-monitoring devices from ESD events during connector mating. IC Role / Device Role / Timing Role: TVS mounted directly at board edge connector, referenced to isolated ground plane. Use Value: UL 497B recognition confirms compliance for medical-grade isolated loop protection, reducing certification effort. |
Use Scenario: Suppressing flyback transients on secondary-side 12 V outputs of offline SMPS used in consumer adapters. IC Role / Device Role / Timing Role: Clamp device placed across output capacitor, shunting energy away from rectifier and load. Use Value: 600 W peak rating handles worst-case transformer leakage energy without thermal failure during short-circuit recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.0A | Lower peak power (400 W), same VRWM and VC; SMA package (smaller footprint, higher thermal resistance). | Limited to lower-energy transients; unsuitable for automotive load dump per ISO 7637-2 Pulse 5a. | Select when space-constrained and surge energy is ≤400 W; verify thermal margin with RJL = 50 °C/W. |
| 1.5SMC6.0A | Same 600 W rating but SMC package (larger, 7.1 mm × 6.2 mm); slightly higher VC (10.5 V) and lower IR (5 µA). | Better thermal mass for repetitive surges; incompatible with SMB footprints due to size and lead pitch. | Choose for high-repetition-rate industrial environments where PCB area allows SMC layout. |
Compared with 1SMB6.0AT3, SMAJ6.0A trades peak power and thermal robustness for compactness, while 1.5SMC6.0A offers identical surge capacity in a larger, more thermally stable package - neither is pin-compatible, requiring layout revision for substitution.
Availability
1SMB6.0AT3 is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC digital inputs, medical equipment power rails, and AC-DC adapter secondary-side protection requiring stable component supply across multi-year production cycles.
Supply support for 1SMB6.0AT3 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 (now part of onsemi) is a global semiconductor supplier specializing in power management, analog, sensor, and connectivity solutions for automotive, industrial, and cloud power applications.
The SMB-series TVS diodes, including 1SMB6.0AT3, were engineered for high-reliability overvoltage protection in harsh environments - emphasizing UL 497B compliance, AEC-Q101 qualification, and robust surge handling in compact surface-mount packages.
FAQ
What is the maximum working voltage the 1SMB6.0AT3 can protect?
The 1SMB6.0AT3 has a working peak reverse voltage (VRWM) of 6.0 V, meaning it is rated to continuously block up to 6.0 V in reverse bias without clamping. It should be selected only for circuits where the normal operating voltage does not exceed this value - for example, protecting a 5 V rail with margin. Exceeding VRWM risks premature conduction and power loss.
Does the 1SMB6.0AT3 meet automotive reliability standards?
Yes, the 1SMB6.0AT3 is AEC-Q101 qualified and PPAP capable, confirming its suitability for automotive applications such as body control modules and infotainment power supplies. Its construction, SURMETIC™ packaging, and 150 °C maximum junction temperature support operation in under-hood environments with validated long-term reliability.
How does the clamping voltage of the 1SMB6.0AT3 compare to its breakdown voltage?
The 1SMB6.0AT3 has a breakdown voltage (VBR) range of 6.7–7.0 V at 10 mA test current, while its clamping voltage (VC) is 10.3 V at 10 A peak pulse current. This ~1.5× ratio reflects the device's dynamic impedance under surge conditions and defines the actual overvoltage stress imposed on protected components during transient events.
Can the 1SMB6.0AT3 be used for bidirectional transient suppression?
No, the 1SMB6.0AT3 is strictly unidirectional. It conducts only during negative transients on its cathode (i.e., positive voltage spikes on the protected line relative to ground). For bidirectional protection - such as AC signal lines or data buses exposed to ± transients - a dedicated bidirectional variant like 1SMB6.0AT3G-B or SMAJ6.0CA must be used instead.
What is the thermal resistance specification critical for PCB layout of the 1SMB6.0AT3?
The 1SMB6.0AT3 specifies a junction-to-lead thermal resistance (RJL) of 25 °C/W, measured with zero lead length on FR-4. To achieve rated 600 W peak power, the PCB must provide adequate copper area under the leads - ON Semiconductor's recommended minimum footprint for Case 403A ensures proper heat spreading and avoids localized overheating during surge events.
1SMB6.0AT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- -
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- -
- Unidirectional Channels:
- -
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- -
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- -
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
1SMB6.0AT3 FAQ
1.How can I place an order for 1SMB6.0AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMB6.0AT3 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 1SMB6.0AT3 reliable?
The price and inventory of 1SMB6.0AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMB6.0AT3 is usually 5 days.
3.What payment methods are accepted for 1SMB6.0AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMB6.0AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMB6.0AT3?
1SMB6.0AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMB6.0AT3 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 1SMB6.0AT3?
For technical support, including 1SMB6.0AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMB6.0AT3 requirements.
6.How does Aetrix verify that 1SMB6.0AT3 is sourced from the original manufacturer or authorized distributors?
All 1SMB6.0AT3 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 1SMB6.0AT3 meets industry standards.
7.What is the process for return or replacement of 1SMB6.0AT3?
All 1SMB6.0AT3 units undergo pre-shipment inspection (PSI). If there is an issue with 1SMB6.0AT3, 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 1SMB6.0AT3 part is unused and in its original packaging.
Return procedure for 1SMB6.0AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMB6.0AT3 Tags
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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