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Semtech Corporation 1N6145AUS
- Part No.:
- 1N6145AUS
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SQ-MELF
- Datasheet:
-
1N6145AUS.pdf
- Description:
- TVS DIODE 9.9VWM 18.2VC
- Quantity:
- Payment:
- Shipping:
Inventory:7,754
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Product details
Overview
1N6145AUS from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection of 22V-rated I/O or power lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 40A, and 20mΩ dynamic resistance. It protects USB Type-C power delivery buses, load switch inputs, and industrial interfaces where stable clamping under temperature and current stress is critical.
For engineers reviewing the 1N6145AUS datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, real-world clamping behavior across temperature, functional role in shunt-based EOS protection, and validated alternative parts for 22V bus protection designs.
Technical Context
The 1N6145AUS uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that turns on the shunt path when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant-27.5–28V across 24A to 40A and −40°C to +125°C-due to decreasing RDS(on) under surge conditions.
It operates with three input terminals (pins 4–6) tied together to the protected line and three ground terminals (pins 1–3), requiring all six pins to be connected for full 40A rating. Its 175pF junction capacitance at 22V/1MHz and 130–600nA reverse leakage support low-noise, high-speed interface protection without signal integrity compromise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC or RMS operating voltage on protected line without triggering |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave) - ensures downstream 24V-rated ICs (e.g., USB PD controllers) remain below damage threshold |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment and USB PD systems |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD requirements without external shielding |
| Dynamic Resistance | 20mΩ - enables flat clamping curve; reduces voltage rise per amp vs. TVS diodes with fixed RDYN |
| Junction Capacitance | 175pF at 22V/1MHz - compatible with USB Type-C VBUS protection where <200pF avoids signal distortion |
| Operating Temperature | −40°C to +125°C - supports operation in harsh environments including industrial motor drives and outdoor IoT gateways |
Pinout & Package
1N6145AUS is housed in a Pb-free, RoHS-compliant DFN package measuring 1.6mm × 1.6mm × 0.55mm with 6 leads and UL 94V-0 molding compound. The compact footprint saves >50% board area versus SO-8 or SOT-23 TVS alternatives while enabling high-current shunt paths via parallel pin connections.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return for surge current; all three must be connected to minimize inductance and achieve full 40A rating |
| Pins 4, 5, 6 | IN | Protected line input (e.g., VBUS); parallel connection ensures uniform current sharing and thermal distribution during transients |
Key Features
| Feature | Design Value |
|---|---|
| FET-based shunt architecture | Enables constant clamping voltage across 24–40A and −40°C to +125°C, unlike voltage-dependent TVS diodes |
| Low dynamic resistance | 20mΩ ensures minimal IR drop during surge, maintaining clamping stability even at max rated current |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz) - protects against repetitive fast transients in motor control and PLC environments |
| Small DFN-6 footprint | 1.6mm × 1.6mm area allows placement directly at USB Type-C connector or load switch input with minimal trace length |
| Lead-free & halogen-free | Complies with RoHS/WEEE and IPC/JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) for standard reflow |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20V–22V VBUS lines in USB-C ports supporting up to 100W PD, exposed to ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Shunt-based transient diverter that activates within nanoseconds to clamp overvoltage before reaching the PD controller or e-fuse. Use Value: Maintains 27.5–28V clamping across temperature-prevents false trips or damage where conventional TVS would exceed 35V at 125°C. |
Use Scenario: Safeguarding input pins of high-side load switches (e.g., HS2950P) in remote meters, robotics, and factory automation systems. IC Role / Device Role / Timing Role: Primary front-end protector that diverts surge energy away from the load switch's internal FET gate oxide and drain-source junction. Use Value: Keeps clamping voltage below 30V, ensuring the load switch's absolute maximum rating (typically 30–36V) is never breached during 40A transients. |
| IoT Edge Gateway Power Bus Protection | Storage Device 22V Rail Protection |
Use Scenario: Securing 22V auxiliary rails powering cellular modems, GNSS receivers, and sensor hubs in outdoor-connected devices. IC Role / Device Role / Timing Role: Single-device solution for combined ESD, EFT, and surge protection on shared power inputs subject to field-repair handling and lightning coupling. Use Value: Eliminates need for multi-stage protection (TVS + MOV + filter) by delivering ±30kV ESD, ±4kV EFT, and 40A surge in one 1.6mm² component. |
Use Scenario: Protecting 22V backup or auxiliary power inputs in NVMe SSD enclosures, NAS units, and enterprise storage controllers. IC Role / Device Role / Timing Role: Low-capacitance (175pF), low-leakage (≤600nA) protector placed upstream of PMICs and LDOs to prevent latch-up or brownout during transients. Use Value: Prevents data corruption or unexpected reset by holding rail voltage within safe window during 1.2/50μs surges common in data center power distribution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Identical electrical specs, same DFN-6 package, identical marking code T22; confirmed as direct replacement per Semtech documentation | No functional difference; used interchangeably in USB-C and load switch designs per Semtech app notes | Select TDS2211P when sourcing from authorized Semtech channels with full traceability and MSL1 compliance |
| SMAJ22A | Standard unidirectional TVS diode; 22V VRWM, 35.5V VC @ 12.3A; higher clamping, no temperature stability, 5.0mm × 4.5mm SMA package | Limited to lower-energy surges; clamping rises to >40V at 125°C, risking PD controller damage | Choose SMAJ22A only for cost-sensitive, non-temperature-critical 22V protection where board space is not constrained |
Compared with TDS2211P (identical function and form) and SMAJ22A (higher-clamp TVS), the 1N6145AUS delivers superior thermal stability and compactness-enabling reliable 22V bus protection in space-constrained, thermally aggressive applications where clamping voltage drift must be avoided.
Availability
1N6145AUS is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT edge gateway power buses requiring stable component supply, consistent surge performance, and long-term lifecycle support.
Supply support for 1N6145AUS 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
Semtech Corporation is a U.S.-based fabless semiconductor company specializing in high-performance analog and mixed-signal semiconductors for power management, protection, and signal integrity.
The 1N6145AUS belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-reliability 20–30V power and interface protection applications demanding flat clamping and wide-temperature robustness.
FAQ
What is the clamping voltage behavior of the 1N6145AUS across temperature and current?
The 1N6145AUS maintains a tightly regulated clamping voltage of 27.5–28V from −40°C to +125°C and across its full 24A–40A peak pulse current range. This stability results from its FET-based shunt architecture, where RDS(on) decreases under surge, counteracting voltage rise-unlike TVS diodes whose clamping increases linearly with both current and temperature. Verified per IEC 61000-4-5 combo-wave testing.
Can the 1N6145AUS be used to protect USB Type-C VBUS lines with Power Delivery?
Yes-the 1N6145AUS is explicitly validated for USB Type-C VBUS protection in systems supporting up to 100W PD. Its 22V working voltage matches the USB PD specification's 20V nominal + 10% tolerance, and its 27.5–28V clamping ensures the PD controller (e.g., STUSB4500, CYPD3177) remains below its 30V absolute maximum rating even at 125°C ambient. Semtech's reference design TDS2211P.C confirms this use case.
How does the 1N6145AUS differ from standard TVS diodes like SMAJ22A?
The 1N6145AUS uses an active FET-triggered shunt mechanism, delivering constant clamping (27.5–28V) across current and temperature, whereas SMAJ22A-a passive pn-junction TVS-clamps at 35.5V @ 12.3A and degrades to >40V at high temperature. The 1N6145AUS also offers 40A surge rating vs. SMAJ22A's 12.3A and fits in a 1.6mm² DFN vs. SMAJ22A's 22.5mm² SMA package.
What PCB layout practices maximize surge performance for the 1N6145AUS?
To maximize surge capability, connect all three IN pins (4–6) with a single short, wide trace to the protected line, and tie all three GND pins (1–3) directly to a solid ground plane using multiple vias. Place the 1N6145AUS within 3mm of the connector. Avoid thermal relief on GND pads and ensure no sensitive traces run beneath the device-per Semtech's layout guidelines in Rev 2.5 datasheet Figure 7.
Is the 1N6145AUS RoHS-compliant and suitable for lead-free reflow?
Yes-the 1N6145AUS is Pb-free, halogen-free, and RoHS/WEEE compliant. Its DFN package meets IPC/JEDEC J-STD-020 MSL1 classification, allowing standard lead-free reflow profiles (peak 260°C) without baking or special handling. The UL 94V-0 molding compound ensures flame resistance in end-equipment certifications.
1N6145AUS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- SQ-MELF
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 9.9V (Max)
- Voltage - Breakdown (Min):
- 12.35V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 82.4A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
1N6145AUS FAQ
1.How can I place an order for 1N6145AUS through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6145AUS 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 1N6145AUS reliable?
The price and inventory of 1N6145AUS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6145AUS is usually 5 days.
3.What payment methods are accepted for 1N6145AUS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6145AUS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6145AUS?
1N6145AUS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6145AUS 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 1N6145AUS?
For technical support, including 1N6145AUS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6145AUS requirements.
6.How does Aetrix verify that 1N6145AUS is sourced from the original manufacturer or authorized distributors?
All 1N6145AUS 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 1N6145AUS meets industry standards.
7.What is the process for return or replacement of 1N6145AUS?
All 1N6145AUS units undergo pre-shipment inspection (PSI). If there is an issue with 1N6145AUS, 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 1N6145AUS part is unused and in its original packaging.
Return procedure for 1N6145AUS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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