My Inquiry
My Account
onsemi 1SMB60AT3
- Part No.:
- 1SMB60AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1SMB60AT3.pdf
- Description:
- TVS DIODE 60VWM 96.8VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:3,976
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1SMB60AT3 from onsemi is a unidirectional 600 W peak power Zener transient voltage suppressor (TVS) diode 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 electronic control units.
For engineers reviewing the 1SMB60AT3 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping performance under 1 ms 600 W surge, UL 497B certification for isolated loop protection, low leakage (<5 µA @ VRWM), and SMB package compatibility with high-density SMT layouts.
Technical Context
The 1SMB60AT3 operates as a unidirectional avalanche diode, conducting only during reverse overvoltage events above its breakdown threshold (VBR = 66.7–73.7 V @ IT = 1.0 mA). Its clamping action limits transient energy by diverting surge current to ground while maintaining a predictable VC ≤ 96.8 V at IPP = 6.2 A.
Thermal design relies on junction-to-lead thermal resistance (RJL = 40 °C/W) and 3.0 W DC power dissipation at TL = 75°C, with derating above that temperature. It meets Class 3 ESD immunity (>16 kV HBM) and is rated for operation from −65°C to +150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Power Rating | 600 W @ 1.0 ms pulse - withstands high-energy transients without failure |
| Working Peak Reverse Voltage (VRWM) | 60 V - selected to exceed normal operating voltage while avoiding false triggering |
| Clamping Voltage (VC) | 96.8 V @ IPP = 6.2 A - defines maximum voltage seen by protected circuit during surge |
| Breakdown Voltage (VBR) | 66.7–73.7 V @ IT = 1.0 mA - ensures reliable avalanche conduction onset within spec |
| Leakage Current (IR) | <5.0 µA @ VRWM = 60 V - minimizes standby power loss and signal interference |
| Response Time | <1.0 ns - enables suppression before transient energy damages downstream ICs |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - qualifies for harsh handling environments |
| UL Recognition | UL 497B (QVGQ2, File #E210057) - certified for isolated loop circuit protection |
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; solderable at 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to system ground or low-side reference in unidirectional TVS configuration |
| Cathode | Current exit terminal during reverse avalanche clamping | Connected to protected line (e.g., 60 V rail); polarity band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without degradation |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage stress on downstream components during clamping event |
| UL 497B recognition | Validates suitability for telecom and industrial isolated loop protection per safety standard |
| Pb−Free (G suffix) packaging | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profiles |
| 270 pF typical junction capacitance | Preserves signal integrity in DC/low-frequency power rails without bandwidth limitation |
Applications
| Industrial Power Supply Input Protection | Automotive Engine Control Unit (ECU) CAN Bus Line Protection |
|---|---|
|
Use Scenario: Protects 48 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: Unidirectional TVS diode placed between input rail and chassis ground, clamping transients within 1 ns. Use Value: Limits voltage to ≤96.8 V during 600 W surge, preventing damage to upstream rectifier and downstream DC-DC controller. |
Use Scenario: Shields CAN_H and CAN_L lines in engine control module from battery voltage transients and ESD events. IC Role / Device Role / Timing Role: Standoff TVS on each line referenced to ground; leverages low leakage (<5 µA) to avoid bus bias shift. Use Value: Maintains CAN signal integrity with 270 pF capacitance while meeting ISO 16750-2 pulse test requirements. |
| Medical Equipment AC/DC Adapter Interface | Telecom DSL Line Card Surge Protection |
|
Use Scenario: Guards secondary-side 24 V output of medical-grade AC/DC adapter against fast-rising ESD and capacitive coupling transients. IC Role / Device Role / Timing Role: Unidirectional clamping device on output rail, coordinated with upstream fuse and common-mode choke. Use Value: UL 497B certification ensures compliance with IEC 60601-1 patient-connected equipment isolation requirements. |
Use Scenario: Installed on POTS line interface of DSLAM line card to absorb lightning-induced surges per GR-1089-CORE. IC Role / Device Role / Timing Role: Primary protection element in hybrid protection circuit, preceding gas discharge tube (GDT) and PTC. Use Value: 600 W rating and 96.8 V clamping enable coordination with GDT follow-on conduction without overstressing silicon. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ60A | Same VRWM (60 V), but lower peak power (600 W same), higher clamping (103 V @ 5.8 A), larger SMB package footprint | Higher VC reduces margin for 5 V-tolerant downstream ICs; identical mounting but slightly higher thermal mass | Prefer 1SMB60AT3 where tighter clamping (96.8 V vs. 103 V) is critical for 3.3 V/5 V logic protection |
| SMCJ60A | Same VRWM (60 V), higher peak power (1500 W), larger SMC package (7.11 × 6.22 mm vs. 4.32 × 3.56 mm), higher clamping (107 V @ 14 A) | Used where higher surge endurance is required (e.g., outdoor telecom), but requires PCB area increase and layout revision | Select 1SMB60AT3 when space-constrained designs demand SMB footprint and 600 W is sufficient per IEC 61000-4-5 |
Compared with SMBJ60A and SMCJ60A, the 1SMB60AT3 delivers the tightest clamping voltage (96.8 V) in the smallest SMB package, making it optimal for compact, cost-sensitive industrial and automotive modules where 600 W surge capability meets system-level test requirements.
Availability
1SMB60AT3 is available at Aetrix Electronics and suitable for industrial power supplies, automotive ECUs, medical AC/DC adapters, and telecom line cards requiring stable component supply across multi-year production cycles.
Supply support for 1SMB60AT3 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The 1SMB60AT3 belongs to the SMB series of unidirectional TVS diodes, engineered for high-surge, low-clamping protection in space-constrained SMT applications across industrial automation, transportation, and communications infrastructure.
FAQ
What is the clamping voltage of the 1SMB60AT3 at its rated peak pulse current?
The 1SMB60AT3 has a maximum clamping voltage (VC) of 96.8 V at a peak pulse current (IPP) of 6.2 A, measured under the standard 10/1000 µs waveform. This value is guaranteed per the datasheet's Electrical Characteristics table and defines the upper voltage limit imposed on protected circuits during surge events. The 1SMB60AT3 achieves this with a clamping ratio of approximately 1.46 relative to its nominal breakdown voltage.
Is the 1SMB60AT3 suitable for bidirectional transient protection?
No, the 1SMB60AT3 is a unidirectional TVS diode and conducts only during reverse-biased overvoltage conditions. It must be used with correct polarity-cathode toward the protected line-and cannot suppress positive-going transients on grounded lines. For bidirectional protection, onsemi offers the 1SMB60CAT3 variant; the 1SMB60AT3 itself is not rated or characterized for symmetrical surge suppression.
Does the 1SMB60AT3 meet UL 497B certification, and what does that cover?
Yes, the 1SMB60AT3 carries UL 497B recognition (File #E210057, category QVGQ2) for protector applications. This certification validates performance in strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge testing-specifically for isolated loop circuits such as telecom interfaces and industrial fieldbus networks. The 1SMB60AT3's UL listing is documented in the official onsemi datasheet and applies directly to this part number.
What is the maximum operating temperature range for the 1SMB60AT3?
The 1SMB60AT3 is rated for an operating and storage temperature range of −65°C to +150°C. Its junction-to-lead thermal resistance (RJL = 40 °C/W) and DC power derating curve allow continuous operation up to 75°C lead temperature (3.0 W), with linear derating beyond that point. This wide range supports deployment in under-hood automotive, industrial motor drives, and outdoor telecom equipment where ambient extremes occur.
How does the 1SMB60AT3 compare to the 1SMB60AT3G variant?
The 1SMB60AT3 and 1SMB60AT3G share identical electrical specifications, thermal ratings, and mechanical dimensions. The "G" suffix denotes a Pb−Free (RoHS-compliant) version with matte tin lead finish, qualified per JEDEC J-STD-020 moisture sensitivity level (MSL) 1. Both variants use the same Surmetic SMB (Case 403A) package and are interchangeable in designs requiring lead-free assembly-no change to layout, thermal design, or protection performance is needed when selecting the 1SMB60AT3G over the 1SMB60AT3.
1SMB60AT3 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):
- 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
1SMB60AT3 FAQ
1.How can I place an order for 1SMB60AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMB60AT3 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 1SMB60AT3 reliable?
The price and inventory of 1SMB60AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMB60AT3 is usually 5 days.
3.What payment methods are accepted for 1SMB60AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMB60AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMB60AT3?
1SMB60AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMB60AT3 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 1SMB60AT3?
For technical support, including 1SMB60AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMB60AT3 requirements.
6.How does Aetrix verify that 1SMB60AT3 is sourced from the original manufacturer or authorized distributors?
All 1SMB60AT3 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 1SMB60AT3 meets industry standards.
7.What is the process for return or replacement of 1SMB60AT3?
All 1SMB60AT3 units undergo pre-shipment inspection (PSI). If there is an issue with 1SMB60AT3, 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 1SMB60AT3 part is unused and in its original packaging.
Return procedure for 1SMB60AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMB60AT3 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…
