My Inquiry
My Account
onsemi 1SMB10AT3
- Part No.:
- 1SMB10AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1SMB10AT3.pdf
- Description:
- TVS DIODE 10VWM 17VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:2,908
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1SMB10AT3 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 10 V working peak reverse voltage (VRWM), 12.3 V minimum breakdown voltage (VBR) at 1.0 mA test current, and clamps to ≤17.0 V at 35.3 A peak pulse current (IPP), making it suitable for protecting DC power rails in industrial power supplies and automotive ECUs.
For engineers reviewing the 1SMB10AT3 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin relative to system operating voltage, surge current handling under 1 ms 10/1000 µs waveform, UL 497B recognition for isolated loop protection, and SMB package thermal performance in FR-4 PCB layouts.
Technical Context
The 1SMB10AT3 operates as a unidirectional Zener-based TVS diode, leveraging avalanche breakdown to clamp transients above its VRWM. Its low zener impedance and <1.0 ns response time enable fast suppression of ESD and lightning-induced surges without significant overshoot when mounted with minimal trace inductance.
It is rated for 600 W non-repetitive peak pulse power per 10/1000 µs waveform, with thermal derating starting at 75°C junction temperature. The device meets Class 3 (>16 kV) HBM ESD rating and is UL 497B recognized for isolated loop circuit protection - a requirement for telecom and industrial interface ports.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 10 V - Maximum continuous reverse operating voltage before clamping begins; must exceed system DC rail voltage. |
| VBR (min) | 12.3 V @ IT = 1.0 mA - Ensures reliable turn-on above normal operating conditions while avoiding false triggering. |
| VC @ IPP | ≤17.0 V @ 35.3 A - Clamping voltage during 1 ms surge; defines maximum stress on protected downstream ICs. |
| PPK | 600 W @ 1 ms - Peak transient energy absorption capability; validates robustness against IEC 61000-4-5 Level 4 surges. |
| IR @ VRWM | ≤5.0 µA - Low leakage preserves efficiency in high-impedance bias networks and battery-powered circuits. |
| Response Time | <1.0 ns - Enables suppression of fast-rising ESD events (IEC 61000-4-2) before damage occurs. |
| UL Recognition | UL 497B QVGQ2 - Certified for use in safety-critical isolated loop protection, including telecom and process control interfaces. |
Pinout & Package
Package: SMB (Case 403A), surface-mount, void-free thermosetting plastic with modified L-bend leads and cathode polarity band. Mounting position is unrestricted; max soldering temperature is 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during clamping | Connected to protected circuit ground or low-side return path; carries full surge current during transient event. |
| Cathode | High-voltage input node | Connected to line being protected (e.g., +12 V rail); polarity band identifies this terminal; reverse-biased under normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Validated for IEC 61000-4-5 surge immunity up to 4 kV (line-earth) in properly laid-out PCBs with short traces. |
| UL 497B recognition | Qualified for use in certified isolated loop protectors - required for industrial fieldbus and telecom interface designs. |
| ESD rating >16 kV HBM | Meets IEC 61000-4-2 Level 4 (±8 kV contact / ±15 kV air) without external series impedance in many applications. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes voltage overshoot margin needed between protected IC's absolute maximum rating and clamping level. |
| Pb-free (G suffix) option | 1SMB10AT3G variant available; compatible with RoHS-compliant reflow profiles and lead-free assembly processes. |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Protecting 12 V DC input rails in programmable logic controllers (PLCs) against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed directly across input terminals to clamp surges before they reach upstream regulators and microcontrollers. Use Value: Limits transient voltage to ≤17.0 V, ensuring safe operation of 20 V-rated input capacitors and 3.3 V/5 V LDOs downstream. |
Use Scenario: Safeguarding LIN bus transceivers and sensor inputs in BCMs exposed to ISO 7637-2 Pulse 1, 2a, and 5a transients. IC Role / Device Role / Timing Role: Parallel-connected TVS on LIN signal lines and 12 V supply pins to absorb coupled energy from alternator load dump. Use Value: Achieves <1.0 ns response and 600 W surge capacity, meeting OEM requirements for EMC robustness without adding RC filtering delay. |
| Telecom Interface Port Protection | Medical Equipment Power Input |
|
Use Scenario: Protecting RS-485 transceiver power pins and common-mode nodes in networked medical devices connected to hospital building wiring. IC Role / Device Role / Timing Role: UL 497B-recognized TVS on isolated 5 V/12 V supply rails feeding isolated data interfaces. Use Value: Provides certified isolation barrier protection against induced surges from nearby MRI or RF equipment without compromising creepage/clearance. |
Use Scenario: Shielding auxiliary 24 V DC power inputs in diagnostic imaging subsystems (e.g., ultrasound front-end modules) from mains coupling events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC input, coordinated with upstream fuse and MOV for staged protection. Use Value: Delivers 35.3 A IPP handling and ≤17.0 V clamping to prevent latch-up or gate oxide rupture in precision analog front-end ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ10A | Same SMB package, identical VRWM (10 V), but lower PPK (600 W same), higher VC (17.0 V vs 17.0 V - matched), tighter VBR tolerance (12.2–13.5 V vs 12.3–15.9 V). | Preferred where tighter VBR distribution is required for consistent clamping threshold across production lots. | Select SMBJ10A if statistical VBR consistency is critical; otherwise 1SMB10AT3 offers broader availability and legacy design support. |
| 1.5SMC10A | Different package (SMC, larger), higher PPK (1500 W), same VRWM (10 V), higher VC (17.0 V), significantly larger footprint and thermal mass. | Suitable only where board space allows SMC and higher surge margin is mandated (e.g., outdoor telecom cabinets). | Choose 1.5SMC10A only when 1500 W surge rating is explicitly required; 1SMB10AT3 is optimal for space-constrained 600 W applications. |
Compared with SMBJ10A, 1SMB10AT3 has wider VBR tolerance but identical clamping and surge ratings; compared with 1.5SMC10A, it delivers equivalent protection in 40% less PCB area but with half the peak power headroom - making it ideal for cost- and size-sensitive industrial and automotive modules.
Availability
1SMB10AT3 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and telecom interface protection requiring stable component supply and long-term lifecycle continuity.
Supply support for 1SMB10AT3 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 manufacturer specializing in power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The 1SMB10AT3 belongs to the SMB-series transient voltage suppressor family, engineered specifically for high-energy surge protection in space-constrained surface-mount applications where reliability, UL certification, and fast response are mandatory.
FAQ
What is the clamping voltage of the 1SMB10AT3 at its rated peak pulse current?
The 1SMB10AT3 clamps to a maximum of 17.0 V at its rated peak pulse current of 35.3 A (10/1000 µs waveform). This value is measured under standardized surge conditions and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is the 1SMB10AT3 suitable for bidirectional signal line protection?
No, the 1SMB10AT3 is a unidirectional TVS diode and must not be used on AC or bidirectional signal lines such as USB D+/D− or RS-485 differential pairs. For those applications, ON Semiconductor offers the 1SMB10CAT3 (bidirectional variant); using 1SMB10AT3 in such roles risks forward conduction during negative half-cycles and failure to suppress negative transients.
Does the 1SMB10AT3 meet UL 497B requirements for isolated loop protection?
Yes, the entire 1SMB5.0AT3 series - including the 1SMB10AT3 - holds UL 497B recognition under file #E210057 for protector classification (QVGQ2). This certification covers dielectric withstand, strike voltage breakdown, endurance conditioning, and discharge testing - validating its use in safety-critical isolated interfaces like industrial fieldbuses and telecom line cards.
What is the maximum leakage current of the 1SMB10AT3 at its working voltage?
The 1SMB10AT3 exhibits a maximum reverse leakage current (IR) of 5.0 µA when biased at its working peak reverse voltage of 10 V. This low leakage ensures minimal power loss in always-on systems and avoids unintended loading of high-impedance sensor bias networks or battery-backed circuits.
Can the 1SMB10AT3 be used in automotive applications subject to ISO 7637-2 transients?
Yes, the 1SMB10AT3 is widely deployed in automotive body control modules and infotainment power supplies to suppress ISO 7637-2 Pulse 1 (inductive load dump), Pulse 2a (sudden load interruption), and Pulse 5a (alternator load dump). Its 600 W peak power rating and 35.3 A IPP capability align with Level III/IV surge requirements when combined with proper PCB layout and upstream fusing.
1SMB10AT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- General Purpose
- Capacitance @ Frequency:
- 1460pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
1SMB10AT3 FAQ
1.How can I place an order for 1SMB10AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMB10AT3 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 1SMB10AT3 reliable?
The price and inventory of 1SMB10AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMB10AT3 is usually 5 days.
3.What payment methods are accepted for 1SMB10AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMB10AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMB10AT3?
1SMB10AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMB10AT3 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 1SMB10AT3?
For technical support, including 1SMB10AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMB10AT3 requirements.
6.How does Aetrix verify that 1SMB10AT3 is sourced from the original manufacturer or authorized distributors?
All 1SMB10AT3 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 1SMB10AT3 meets industry standards.
7.What is the process for return or replacement of 1SMB10AT3?
All 1SMB10AT3 units undergo pre-shipment inspection (PSI). If there is an issue with 1SMB10AT3, 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 1SMB10AT3 part is unused and in its original packaging.
Return procedure for 1SMB10AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMB10AT3 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
