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onsemi 1SMB10AT3G
- Part No.:
- 1SMB10AT3G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1SMB10AT3G.pdf
- Description:
- TVS DIODE 10VWM 17VC 425-TEPBGA
- Quantity:
- Payment:
- Shipping:
Inventory:11,169
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Product details
Overview
1SMB10AT3G 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 surges, and inductive switching transients. It features a 10 V working peak reverse voltage (VRWM), 17.0 V maximum clamping voltage at 35.3 A peak pulse current (VC @ IPP), and <1.0 ns response time - deployed in automotive powertrain control units, industrial PLC I/O modules, and AC/DC power supply input stages.
For engineers reviewing the 1SMB10AT3G datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM ≥ 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 1SMB10AT3G operates as a Zener-based avalanche diode with sharp breakdown knee and low dynamic impedance (<1 Ω typical), enabling fast energy diversion during sub-microsecond transients. Its unidirectional architecture blocks reverse voltage up to 10 V while clamping positive surges above VBR = 11.1–12.3 V.
Thermal design relies on junction-to-lead resistance (RJL = 25 °C/W) and FR-4 board mounting with minimum recommended footprint (Case 403A). It sustains 100 A non-repetitive forward surge (IFSM) and meets AEC-Q101 stress test requirements for automotive underhood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 10 V - Maximum continuous reverse operating voltage before clamping begins; must exceed circuit's DC or peak AC rail voltage. |
| VBR @ IT=1.0 A | 11.1–12.3 V - Breakdown voltage range defining reliable avalanche onset; ensures predictable turn-on across temperature and unit variation. |
| VC @ IPP=35.3 A | 17.0 V - Maximum clamped voltage seen by protected circuit during 600 W, 1 ms transient; determines safe margin below downstream IC VMAX. |
| PPK | 600 W - Peak pulse power handling per 10/1000 µs waveform; defines single-event surge survivability without degradation. |
| IR @ VRWM | 5.0 µA max - Reverse leakage at rated working voltage; negligible loading on high-impedance signal or bias rails. |
| Response Time | <1.0 ns - Time from transient onset to clamping conduction; critical for protecting high-speed interfaces and microcontrollers. |
| Ctyp @ 0 V, 1 MHz | 1460 pF - Junction capacitance affecting high-frequency signal integrity; relevant for data line protection (e.g., RS-485, CAN). |
Pinout & Package
1SMB10AT3G uses the SMB (DO-214AA) surface-mount package (Case 403A), featuring a void-free thermosetting plastic body, corrosion-resistant finish, and modified L-bend leads for enhanced solder joint reliability. Polarity is marked by a cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to circuit ground or lowest potential node; completes clamping path during positive transients. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 12 V rail, signal input); conducts avalanche current into anode when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition (QVGQ2) | Validated for isolated loop circuit protection - enables use in telecom, industrial Ethernet, and medical isolation barriers without additional certification effort. |
| AEC-Q101 Qualified | Qualified for automotive applications including engine control, body electronics, and ADAS power domains - supports PPAP documentation and long-term reliability validation. |
| ESD Rating >16 kV HBM | Withstands human-body-model ESD events without parameter shift - eliminates need for secondary ESD protection on board-level inputs. |
| Pb-Free (RoHS Compliant) | Meets global environmental regulations and lead-free reflow profiles (260 °C / 10 s); compatible with standard SMT assembly lines. |
| Low Clamping Ratio (VC/VBR ≈ 1.5) | Efficient voltage limiting with minimal overvoltage overshoot - preserves margin for 15 V-rated components on 12 V systems. |
Applications
| Automotive Power Distribution | Industrial PLC Digital Input |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and local regulator input to clamp transients up to 60 V. Use Value: Limits voltage to ≤17.0 V during 35.3 A surges, preventing damage to 24 V-rated LDOs and microcontroller power pins. |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring induced surges. IC Role / Device Role / Timing Role: Parallel-connected TVS on each optocoupler input leg to shunt inductive kickback from solenoid coils. Use Value: Responds in <1 ns to suppress spikes before they reach isolation barrier, maintaining signal integrity and reducing false triggering. |
| AC/DC Power Supply Input | Telecom Isolated Data Line |
|
Use Scenario: Safeguarding primary-side rectifier and controller ICs in offline SMPS against lightning-induced surges on AC mains. IC Role / Device Role / Timing Role: Mounted across bridge rectifier output to clamp differential-mode transients before bulk capacitor. Use Value: Handles 600 W peak pulses without failure, enabling compliance with IEC 61000-4-5 Level 3 (2 kV/12 Ω) immunity testing. |
Use Scenario: Protecting RS-485 transceivers in building automation networks connected to long outdoor runs. IC Role / Device Role / Timing Role: Bidirectional protection not required; unidirectional 1SMB10AT3G used on VCC-supplied side of isolated bus interface. Use Value: UL 497B recognition validates use in safety-isolated circuits; 1460 pF capacitance avoids signal edge degradation at 10 Mbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ10A | Same VRWM (10 V) and VC (17.0 V), but lower PPK = 400 W; SMA package (smaller footprint, higher RJA). | Limited to lower-energy transients; unsuitable for ISO 7637-2 load dump or IEC 61000-4-5 Level 3. | Select 1SMB10AT3G when 600 W surge rating and SMB thermal robustness are required for automotive or industrial mains protection. |
| 1.5SMC10A | Identical electrical specs (VRWM=10 V, VC=17.0 V, PPK=600 W), but larger SMC (DO-214AB) package with higher thermal mass. | Better sustained power handling under repetitive surges; requires more PCB area and different footprint. | Choose 1SMB10AT3G for space-constrained designs where SMB's 2.28 × 3.56 mm footprint and proven board-level reliability are prioritized. |
Compared with SMAJ10A and 1.5SMC10A, the 1SMB10AT3G delivers identical clamping performance in a thermally optimized, UL-recognized SMB package - balancing surge robustness, PCB area efficiency, and automotive qualification without layout redesign.
Availability
1SMB10AT3G is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and AC/DC power supplies requiring stable component supply, long lifecycle support, and certified surge protection.
Supply support for 1SMB10AT3G 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 onsemi) is a global semiconductor supplier specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The 1SMB10AT3G belongs to the SMB-series transient voltage suppressors - engineered for high-reliability clamping in harsh environments, with emphasis on automotive AEC-Q101 compliance, UL 497B recognition, and robust surge endurance.
FAQ
What is the clamping voltage of the 1SMB10AT3G under maximum surge conditions?
The 1SMB10AT3G clamps to a maximum of 17.0 V when subjected to its rated peak pulse current of 35.3 A (10/1000 µs waveform). This value is guaranteed across temperature and unit variation per the datasheet's Electrical Characteristics table and defines the upper voltage limit imposed on protected circuitry during transient events.
Is the 1SMB10AT3G suitable for bidirectional signal line protection?
No - the 1SMB10AT3G is a unidirectional TVS diode, intended only for DC-biased or positive-polarity surge suppression. For bidirectional protection (e.g., AC lines or data buses with no DC bias), ON Semiconductor offers the complementary 1SMB10CAT3G variant. Using 1SMB10AT3G on bidirectional lines risks reverse conduction and failure.
Does the 1SMB10AT3G meet automotive qualification standards?
Yes - the 1SMB10AT3G is AEC-Q101 qualified and PPAP capable. It undergoes stress testing for temperature cycling, humidity, mechanical shock, and surge endurance per automotive reliability requirements, making it suitable for under-hood and chassis-mounted applications in passenger vehicles and commercial fleets.
What is the maximum operating temperature range for the 1SMB10AT3G?
The 1SMB10AT3G is rated for operation and storage from −65 °C to +150 °C. Its junction-to-lead thermal resistance (RJL = 25 °C/W) and SMB package construction enable stable performance across this full range when mounted on appropriate copper land patterns per the Case 403A footprint guidelines.
How does the UL 497B recognition benefit system-level certification?
UL 497B recognition (File #E210057, Category QVGQ2) certifies the 1SMB10AT3G for use in isolated loop protectors - allowing designers to leverage its qualification in end-equipment submissions for telecom, industrial control, and medical devices without retesting the TVS itself, accelerating time-to-certification.
1SMB10AT3G 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):
- 10V
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- Current - Peak Pulse (10/1000µs):
- 35.3A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- 1460pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
1SMB10AT3G FAQ
1.How can I place an order for 1SMB10AT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMB10AT3G 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 1SMB10AT3G reliable?
The price and inventory of 1SMB10AT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMB10AT3G is usually 5 days.
3.What payment methods are accepted for 1SMB10AT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMB10AT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMB10AT3G?
1SMB10AT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMB10AT3G 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 1SMB10AT3G?
For technical support, including 1SMB10AT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMB10AT3G requirements.
6.How does Aetrix verify that 1SMB10AT3G is sourced from the original manufacturer or authorized distributors?
All 1SMB10AT3G 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 1SMB10AT3G meets industry standards.
7.What is the process for return or replacement of 1SMB10AT3G?
All 1SMB10AT3G units undergo pre-shipment inspection (PSI). If there is an issue with 1SMB10AT3G, 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 1SMB10AT3G part is unused and in its original packaging.
Return procedure for 1SMB10AT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMB10AT3G Tags
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