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Semtech Corporation 1N6173AUS
- Part No.:
- 1N6173AUS
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SQ-MELF
- Datasheet:
-
1N6173AUS.pdf
- Description:
- TVS DIODE 152VWM 273VC
- Quantity:
- Payment:
- Shipping:
Inventory:2,636
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Product details
Overview
1N6173AUS from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection of 22V-rated power or I/O 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 - deployed in USB PD, USB Type-C, and industrial load switch input protection.
For engineers reviewing the 1N6173AUS datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, clamping stability across temperature, and real-world implementation context for surge-prone 22V bus interfaces.
Technical Context
The 1N6173AUS employs 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 - enabling near-constant clamping independent of pulse amplitude. Unlike conventional TVS diodes, its clamping voltage remains stable from −40°C to +125°C due to low RDS(on) behavior under surge conditions.
It operates with reverse stand-off voltage of 22V, breakdown voltage of 25–27.9V at 1mA, and junction capacitance of 175pF at 22V/1MHz - optimized for low-impedance, high-current diversion without thermal runaway or voltage drift during repeated transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC operating voltage before triggering; matches USB PD 20V nominal + margin. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - ensures protected ICs (e.g., load switches, PD controllers) remain below damage thresholds during worst-case surges. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements for 22V systems. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD robustness standards without derating. |
| Dynamic Resistance | 20mΩ - enables low-voltage drop during conduction, minimizing power dissipation and thermal stress under surge. |
| Junction Capacitance | 175pF at 22V/1MHz - compatible with moderate-speed power/data lines (e.g., VBUS, CC, SBU); not suitable for >10Gbps differential pairs. |
Pinout & Package
1N6173AUS is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no internal thermal pad required). All six terminals are electrically active: three parallel input pins and three parallel ground pins - mandatory full connection required for rated 40A surge handling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Low-inductance ground return path; all three must be connected to PCB ground plane via multiple vias to sustain 40A surge current. |
| Pins 4, 5, 6 | IN | Parallel-connected input terminals for protected line (e.g., VBUS); shared surge current path reduces per-pin current density and parasitic inductance. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across 1–40A (8/20μs) and −40°C to +125°C - eliminates need for thermal derating or over-spec'ing IPP. |
| FET-based shunt topology | Replaces PN-junction TVS with low-RDS(on) MOSFET triggered by precision reference - avoids junction heating and voltage drift under repeated surges. |
| High-energy EOS protection | Rated for 1120W peak pulse power (8/20μs) - supports sustained surge events in industrial equipment and remote metering. |
| Low leakage & stable capacitance | 600nA max reverse leakage at 22V and 175pF capacitance stable over temperature - preserves signal integrity on 22V power rails. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting VBUS lines in USB-C ports supporting up to 20V/5A PD negotiation, exposed to ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Primary EOS shunt suppressor placed at connector entry point, clamping transients before reaching PD controller and load switch. Use Value: Maintains 27.5–28V clamping across temperature - prevents false OVP trips and ensures PD controller survival where standard TVS would exceed 38V at 125°C. |
Use Scenario: Safeguarding input terminals of high-side load switches (e.g., HS2950P) in robotics, remote meters, and IoT gateways subjected to field surges. IC Role / Device Role / Timing Role: Front-end transient diverter that limits voltage across load switch FET drain-source during 1.2/50μs combination wave surges. Use Value: Keeps clamping voltage below 30V - avoids gate oxide damage and latch-up in integrated load switches rated for ≤30V absolute max VDS. |
| IoT Device Power Rail Protection | Storage Device 22V Bus Protection |
|
Use Scenario: Securing 22V auxiliary power inputs in battery-backed edge sensors and wireless gateways operating in uncontrolled environments. IC Role / Device Role / Timing Role: Single-device solution for combined ESD, EFT, and surge protection on main supply rail - replaces multi-component TVS+filter networks. Use Value: Delivers ±4kV EFT immunity (IEC 61000-4-4) and 40A surge rating in 2.56mm² footprint - reduces BOM count and PCB area vs. discrete TVS + ferrite solutions. |
Use Scenario: Protecting 22V backup or auxiliary power inputs in NVMe SSD enclosures and enterprise storage controllers. IC Role / Device Role / Timing Role: High-reliability clamp for hot-swap and insertion transients on storage subsystem power rails. Use Value: Stable 27.5–28V clamping ensures no voltage overshoot triggers storage controller reset or NAND flash corruption during plug-in events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A | Standard unidirectional TVS diode; 22V VRWM, 35.5V VC @ 12.3A; higher clamping, no temperature stability. | Limited to lower-energy surges; requires derating above 85°C; unsuitable for 40A or wide-temp industrial use. | Select only if cost sensitivity outweighs clamping performance and thermal stability requirements. |
| TDS2211P | Same family, identical specs and package; Semtech's direct replacement part number for 1N6173AUS (confirmed cross-reference). | Identical application scope and layout compatibility - validated for USB-C, load switch, and industrial 22V bus protection. | Preferred for new designs; same footprint, same performance, updated marking and traceability. |
Compared with SMAJ22A, 1N6173AUS delivers 8–10V lower clamping at full surge current and maintains it across temperature - critical for protecting modern 22V-rated ICs. Compared with TDS2211P, 1N6173AUS is functionally identical but may differ in date-code marking and reel packaging; no design changes required.
Availability
1N6173AUS is available at Aetrix Electronics and suitable for USB Type-C PD systems, industrial load switch inputs, and IoT device 22V power rails requiring stable component supply, long-term lifecycle support, and guaranteed surge performance compliance.
Supply support for 1N6173AUS 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 ICs for precision sensing, protection, and signal integrity.
The 1N6173AUS belongs to Semtech's Transient Diverting Suppressor (TDS) product line - engineered specifically to replace conventional TVS diodes in high-reliability 22V power and interface protection applications where clamping stability and surge endurance are critical.
FAQ
What is the exact package type and dimensions of the 1N6173AUS?
The 1N6173AUS uses a DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with three GND pins (1–3) and three IN pins (4–6). It has no internal thermal pad; PCB ground vias under the exposed copper area are recommended for optimal surge current handling. The land pattern follows Semtech's documented DFN-6 outline with 0.5mm pitch.
Does the 1N6173AUS meet IEC 61000-4-5 surge immunity standards?
Yes, the 1N6173AUS is rated for 40A peak pulse current under the IEC 61000-4-5 8/20μs waveform and also supports ±1kV (1.2/50μs voltage, 8/20μs current, RS = 42Ω) for unsymmetrical line testing. Its 27.5–28V clamping at 40A ensures compliance with Level 4 industrial surge requirements for 22V systems.
How does the clamping voltage of the 1N6173AUS behave across temperature?
The 1N6173AUS maintains clamping voltage between 27.5V and 28V from −40°C to +125°C at 40A (8/20μs), confirmed in Semtech's datasheet Figure 3. This stability results from its FET-based shunt architecture - unlike standard TVS diodes whose clamping rises significantly with temperature.
Can the 1N6173AUS be used on high-speed data lines like USB SuperSpeed or PCIe?
No, the 1N6173AUS is not suitable for high-speed data lines. With 175pF junction capacitance at 22V, it introduces excessive loading on differential pairs operating above ~100MHz. It is intended exclusively for 22V power rails (VBUS, CC, SBU) and low-speed control lines - not for SSTX+/SSTX−, RX+/TX−, or DP/DM.
Is the 1N6173AUS pin-compatible with the TDS2211P?
Yes, the 1N6173AUS and TDS2211P share identical DFN-6 pinout, electrical specifications, thermal characteristics, and mechanical dimensions. Semtech documents them as functionally equivalent parts; layout, schematic, and BOM can be reused without modification between the two.
1N6173AUS 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):
- 152V (Max)
- Voltage - Breakdown (Min):
- 190V
- Voltage - Clamping (Max) @ Ipp:
- 273V
- Current - Peak Pulse (10/1000µs):
- 5.5A
- 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:
- -
1N6173AUS FAQ
1.How can I place an order for 1N6173AUS through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6173AUS 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 1N6173AUS reliable?
The price and inventory of 1N6173AUS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6173AUS is usually 5 days.
3.What payment methods are accepted for 1N6173AUS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6173AUS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6173AUS?
1N6173AUS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6173AUS 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 1N6173AUS?
For technical support, including 1N6173AUS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6173AUS requirements.
6.How does Aetrix verify that 1N6173AUS is sourced from the original manufacturer or authorized distributors?
All 1N6173AUS 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 1N6173AUS meets industry standards.
7.What is the process for return or replacement of 1N6173AUS?
All 1N6173AUS units undergo pre-shipment inspection (PSI). If there is an issue with 1N6173AUS, 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 1N6173AUS part is unused and in its original packaging.
Return procedure for 1N6173AUS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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