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onsemi 1SMA6.0AT3
- Part No.:
- 1SMA6.0AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
1SMA6.0AT3.pdf
- Description:
- TVS DIODE 6VWM 10.3VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:9,742
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Product details
Overview
1SMA6.0AT3 from ON Semiconductor is a unidirectional 400 W peak power Zener transient voltage suppressor (TVS) in SMA package, with 6.0 V working peak reverse voltage (VRWM), 7.02 V nominal breakdown voltage (VBR) at 10 mA test current, and 10.3 V clamping voltage (VC) at 38.8 A peak pulse current. It protects sensitive electronics in power supply input stages against ESD and surge events.
For engineers reviewing the 1SMA6.0AT3 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM ≥ circuit operating voltage, VC margin relative to IC absolute maximum ratings, Ipp capability for expected surge waveforms, and thermal derating under board-level ambient conditions.
Technical Context
The 1SMA6.0AT3 operates as a unidirectional avalanche diode, conducting only during reverse overvoltage transients above its VBR threshold while remaining high-impedance under normal bias. Its low zener impedance and sub-1 ns response time enable effective clamping of fast-rising ESD pulses per IEC 61000-4-2 Level 4.
Designed for surface-mount use on FR-4 PCBs, it features a flat handling surface and top/bottom mounting flexibility. Thermal performance is defined by RJA = 250 °C/W (at TA = 25°C) and RJL = 20 °C/W (measured zero-lead-length), requiring careful pad design per Case 403D-02 footprint for reliable 400 W pulse handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 6.0 V - Maximum continuous reverse operating voltage before clamping begins; must exceed system DC rail or peak AC voltage. |
| VBR @ IT=10 mA | 7.02 V (nominal) - Avalanche breakdown onset; defines minimum overvoltage level at which protection activates. |
| VC @ IPP=38.8 A | 10.3 V - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream components. |
| PPK | 400 W @ 1 ms - Peak transient energy absorption capacity; validated for non-repetitive 10×1000 µs waveform. |
| IR @ VRWM | 400 µA max - Reverse leakage at rated working voltage; ensures minimal standby power loss and signal integrity. |
| ESD Rating | Class 3 (>16 kV HBM) - Confirmed human-body-model ESD robustness for handling and board-level immunity. |
Pinout & Package
SMA package (Case 403D-02), surface-mount plastic package with cathode indicated by molded band; dimensions: 4.06–4.57 mm × 2.29–2.92 mm × 1.91–2.41 mm (L×W×H); flat handling surface supports accurate pick-and-place.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path) in unidirectional TVS configuration. |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., VBUS, signal line); polarity band identifies this terminal for correct orientation. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Enables robust protection against IEC 61000-4-5 10/1000 µs surges up to 400 W without degradation. |
| Sub-1 ns response time | Clamps transients before sensitive ICs experience overstress, critical for USB, Ethernet, and automotive data lines. |
| Low zener impedance | Maintains tight VC tolerance across IPP range, ensuring predictable clamping behavior under varying surge magnitudes. |
| Pb-free (1SMA6.0AT3G) option | Meets RoHS Directive 2011/65/EU requirements without compromising electrical or thermal performance. |
Applications
| Power Supply Input Protection | Automotive ECUs |
|---|---|
Use Scenario: Installed across DC input rails (e.g., 5 V, 12 V) of switching power supplies to absorb load-dump or inductive-switching transients. IC Role / Device Role: Unidirectional TVS diode providing primary overvoltage clamping ahead of input filter capacitors and regulators. Use Value: Limits transient voltage to ≤10.3 V, preventing damage to upstream rectifiers and downstream DC/DC controllers rated for 12 V absolute max. | Use Scenario: Mounted on CAN bus lines or sensor supply inputs in engine control units exposed to ISO 7637-2 pulse 1/2/5a. IC Role / Device Role: Standoff voltage protector absorbing coupled spikes while maintaining signal integrity during normal operation. Use Value: Withstands 38.8 A peak pulse current and >16 kV HBM ESD, meeting OEM immunity requirements without adding series resistance. |
| Industrial PLC I/O Modules | Medical Equipment Power Inputs |
Use Scenario: Placed on 24 V digital input channels subject to field-wiring induced surges in factory automation systems. IC Role / Device Role: First-line transient suppressor shunting surge energy to ground before optocoupler or microcontroller input pins. Use Value: Clamps 10/1000 µs transients to 10.3 V within 1 ns, protecting 3.3 V logic interfaces via appropriate voltage divider or isolation design. | Use Scenario: Applied to AC/DC adapter outputs powering diagnostic imaging subsystems where reliability and low leakage are critical. IC Role / Device Role: Low-leakage (≤400 µA) Zener TVS ensuring no interference with precision analog front-ends during standby. Use Value: Maintains <0.5 W steady-state dissipation at 25°C ambient, supporting long-term operation in thermally constrained enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.0A | 600 W peak power, SMB package (larger footprint), 10.3 V VC @ 58.3 A IPP | Better surge handling but requires more PCB area; higher thermal mass improves repetitive surge endurance. | Select when system-level surge testing exceeds 400 W or when board layout allows larger SMB footprint. |
| 1N6105A | 400 W peak power, DO-204AC (DO-15) through-hole package, 10.5 V VC @ 38.1 A IPP | Through-hole mounting; less suitable for automated SMT assembly; higher RJA limits power density in compact designs. | Select for legacy through-hole designs or where manual rework accessibility outweighs SMT efficiency. |
Compared with SMBJ6.0A and 1N6105A, the 1SMA6.0AT3 offers optimal balance of 400 W surge capability, compact SMA footprint, and low-profile mounting-ideal for space-constrained SMT power rails where 6.0 V VRWM and 10.3 V clamping are system-matched.
Availability
1SMA6.0AT3 is available at Aetrix Electronics and suitable for power supply input protection, automotive ECU surge suppression, and industrial PLC I/O modules requiring stable component supply and consistent parametric performance across production lots.
Supply support for 1SMA6.0AT3 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 onsemi) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and medical markets.
The 1SMAxxAT3 series was developed specifically for cost-sensitive, high-reliability transient suppression in consumer and industrial power electronics, emphasizing robust surge handling in compact surface-mount form factors.
FAQ
What is the working peak reverse voltage (VRWM) of the 1SMA6.0AT3?
The 1SMA6.0AT3 has a working peak reverse voltage (VRWM) of 6.0 V, meaning it remains non-conductive under normal reverse bias up to this voltage. This value is selected to match or slightly exceed the DC or peak AC operating voltage of the protected circuit-such as a 5 V rail-ensuring reliable standoff while enabling fast clamping above threshold. The 1SMA6.0AT3 datasheet confirms VRWM = 6.0 V at TA = 25°C.
What clamping voltage does the 1SMA6.0AT3 achieve during a surge event?
The 1SMA6.0AT3 achieves a maximum clamping voltage (VC) of 10.3 V when subjected to its rated peak pulse current (IPP) of 38.8 A, measured using the standard 10/1000 µs waveform. This VC value defines the upper voltage limit imposed on protected circuitry during transient events. The 1SMA6.0AT3 maintains this clamping performance with sub-1 ns response, making it suitable for safeguarding low-voltage ICs.
Is the 1SMA6.0AT3 RoHS compliant and lead-free?
Yes, the 1SMA6.0AT3 is available in a Pb-free version designated as 1SMA6.0AT3G, fully compliant with the EU RoHS Directive 2011/65/EU. Both variants share identical electrical specifications and thermal characteristics; the "G" suffix indicates lead-free terminations and compatible soldering profiles (up to 260°C for 10 seconds). The 1SMA6.0AT3G is the recommended choice for new designs targeting environmental compliance.
How does the 1SMA6.0AT3 handle thermal dissipation in continuous operation?
The 1SMA6.0AT3 is rated for 0.5 W DC power dissipation at TA = 25°C, derating linearly above that temperature at 4.0 mW/°C. Its thermal resistance from junction to ambient (RJA) is 250 °C/W under standard FR-4 board conditions. For sustained operation, designers must ensure adequate copper pour and avoid enclosure hotspots-especially since the 1SMA6.0AT3 is intended for transient, not continuous, power dissipation.
What is the polarity marking convention for the 1SMA6.0AT3?
The 1SMA6.0AT3 uses a molded cathode band to indicate polarity: the banded end is the cathode, which connects to the line being protected (e.g., VBUS), while the unbanded end is the anode, connected to ground or return. This unidirectional configuration ensures conduction only during reverse overvoltage events. The 1SMA6.0AT3 marking code "QG" appears adjacent to the cathode band per the datasheet's marking diagram.
1SMA6.0AT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 6V
- Voltage - Breakdown (Min):
- 6.67V
- Voltage - Clamping (Max) @ Ipp:
- 10.3V
- Current - Peak Pulse (10/1000µs):
- 38.8A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 1730pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
1SMA6.0AT3 FAQ
1.How can I place an order for 1SMA6.0AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMA6.0AT3 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 1SMA6.0AT3 reliable?
The price and inventory of 1SMA6.0AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMA6.0AT3 is usually 5 days.
3.What payment methods are accepted for 1SMA6.0AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMA6.0AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMA6.0AT3?
1SMA6.0AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMA6.0AT3 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 1SMA6.0AT3?
For technical support, including 1SMA6.0AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMA6.0AT3 requirements.
6.How does Aetrix verify that 1SMA6.0AT3 is sourced from the original manufacturer or authorized distributors?
All 1SMA6.0AT3 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 1SMA6.0AT3 meets industry standards.
7.What is the process for return or replacement of 1SMA6.0AT3?
All 1SMA6.0AT3 units undergo pre-shipment inspection (PSI). If there is an issue with 1SMA6.0AT3, 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 1SMA6.0AT3 part is unused and in its original packaging.
Return procedure for 1SMA6.0AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMA6.0AT3 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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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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onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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