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Semtech Corporation 1N6112AUS
- Part No.:
- 1N6112AUS
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SQ-MELF
- Datasheet:
-
1N6112AUS.pdf
- Description:
- TVS DIODE 13.7VWM 25.1VC
- Quantity:
- Payment:
- Shipping:
Inventory:5,449
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Product details
Overview
1N6112AUS 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 ultra-low 20mΩ dynamic resistance. It protects USB PD, USB Type-C VBus, and load switch inputs in industrial and portable electronics.
For engineers reviewing the 1N6112AUS datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, real-world clamping stability across temperature and current, and validated alternatives for 22V bus protection design.
Technical Context
The 1N6112AUS 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-from 24A to 40A and across –40°C to +125°C due to decreasing RDS(on) under surge conditions.
It operates with reverse stand-off voltage (VRWM) of 22V, breakdown voltage (VBR) of 25–27.9V at 1mA, and exhibits only 130–600nA leakage at VRWM. Its 175pF junction capacitance at 22V/1MHz and 0.5V forward voltage support low-distortion protection without signal integrity compromise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - matches nominal USB PD VBus and industrial 24V rail systems without derating. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - stays below 30V damage threshold of common load switches and PD controllers. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and consumer ESD robustness requirements. |
| Dynamic Resistance | 20mΩ - enables stable clamping independent of current magnitude, unlike TVS diodes. |
| Junction Capacitance | 175pF at 22V/1MHz - low enough for DC power rails; not intended for high-speed data lines. |
Pinout & Package
1N6112AUS is housed in a RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no internal thermal pad required). All six terminals must be connected for full 40A surge rating: pins 1–3 are GND, pins 4–6 are IN.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path; all three must be soldered to PCB ground plane with multiple vias to minimize inductance during surge events. |
| 4, 5, 6 | IN | Protected line input (e.g., VBus); parallel connection ensures uniform current sharing and full 40A capability. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V from 24A to 40A - eliminates need for over-spec'ing IPP to meet voltage limits. |
| Temperature-stable protection | Clamps at 27.5–28V from –40°C to +125°C - removes thermal derating calculations required for TVS diodes. |
| Low dynamic resistance | 20mΩ - reduces I²R heating and enables higher surge energy absorption per unit area vs. silicon avalanche devices. |
| DFN-6 space efficiency | 1.6mm × 1.6mm footprint - saves >60% board area versus SO-8 or SOT-23 TVS solutions rated for same 40A surge. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20–22V VBus lines in USB-C ports supporting up to 100W PD negotiation against ESD, lightning-induced surges, and hot-plug transients. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed directly at connector entry point, operating in parallel with low-capacitance TVS on SuperSpeed lanes. Use Value: Maintains clamping at ≤28V across full temperature range and 40A surge, preventing latch-up or gate oxide damage in PD controllers like TUSB73x or STUSB4500. |
Use Scenario: Safeguarding input pins of high-side load switches (e.g., ON Semiconductor NIS5132, TI TPS25940) in remote meters, PLC I/O modules, and robotics power distribution units. IC Role / Device Role / Timing Role: Front-end transient clamp limiting voltage seen by the load switch's internal MOSFET drain, avoiding avalanche failure or overvoltage lockout. Use Value: Enables use of cost-optimized load switches without integrated surge protection, reducing BOM count while meeting IEC 61000-4-5 compliance. |
| IoT Edge Node Power Rail Protection | Tablet/Notebook Auxiliary 22V Supply Protection |
Use Scenario: Securing 22V auxiliary rails powering cellular modems, GPS receivers, or sensor fusion hubs in battery-backed IoT gateways deployed outdoors or in electrically noisy environments. IC Role / Device Role / Timing Role: Standalone transient suppressor on main DC input, coordinated with upstream e-fuse and downstream LDOs to form layered protection stack. Use Value: Delivers 40A surge handling in <2.6mm² area, enabling compact enclosure designs without sacrificing immunity to induced surges from nearby AC wiring or RF sources. |
Use Scenario: Protecting 22V camera or display backlight supplies in premium tablets and 2-in-1 notebooks where space constraints preclude larger TVS arrays. IC Role / Device Role / Timing Role: Point-of-load clamp adjacent to DC-DC converter input, minimizing trace inductance to preserve clamping response time (<1ns turn-on). Use Value: Achieves 28V clamping at 40A with 175pF capacitance - avoids resonance issues common with multi-diode TVS stacks on sensitive analog rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Identical functional specification, pinout, and package; 1N6112AUS is Semtech's alternate ordering code for TDS2211P. | No functional difference - both qualify for same USB PD, industrial, and IoT use cases. | Select based on distributor stock and reel size preference; identical performance and qualification status. |
| SMAJ22A | Standard unidirectional TVS diode; 22V VRWM, 35.5V VC @ 12.3A, 1000W PPPK; no constant-clamp behavior. | Higher clamping (≥35.5V) and strong temperature dependence - unsuitable where protected ICs have <30V absolute max ratings. | Only consider if system-level testing confirms 35.5V clamping is acceptable and thermal derating margins exist. |
Compared with TDS2211P and SMAJ22A, the 1N6112AUS delivers identical protection performance to TDS2211P but offers no advantage over SMAJ22A beyond lower clamping voltage and superior temperature stability-critical when protecting 22V-rated controllers with tight voltage margins.
Availability
1N6112AUS is available at Aetrix Electronics and suitable for USB Type-C power delivery interfaces, industrial load switch inputs, and IoT edge node power rails requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for 1N6112AUS 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 power management, protection, sensing, and connectivity.
The 1N6112AUS belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 20–24V power rail protection where stable clamping and temperature insensitivity are mandatory.
FAQ
What is the exact package type and dimensions of the 1N6112AUS?
The 1N6112AUS uses a 6-pin DFN package measuring 1.6mm × 1.6mm × 0.55mm with exposed copper pad. Pin 1 is marked by a laser dot; pins 1–3 are GND, pins 4–6 are IN. This compact footprint supports high-density PCB layouts in space-constrained USB-C and IoT applications.
Does the 1N6112AUS require a thermal pad or heatsink on the PCB?
No, the 1N6112AUS does not require an external thermal pad or heatsink. Its surge energy is dissipated through the low-RDS(on) FET structure, and the DFN package is designed for direct mounting to standard PCB copper planes. Multiple vias from pins 1–3 to internal ground layers are recommended to reduce parasitic inductance.
How does the clamping voltage of the 1N6112AUS compare to standard TVS diodes at elevated temperatures?
Unlike standard TVS diodes whose clamping voltage rises significantly with temperature, the 1N6112AUS maintains 27.5–28V clamping from –40°C to +125°C. At 125°C, a typical 22V TVS may clamp above 38V-exceeding safe limits for many PD controllers-while the 1N6112AUS remains stable and predictable.
Can the 1N6112AUS be used on high-speed data lines like USB SuperSpeed or PCIe?
No, the 1N6112AUS is not suitable for high-speed data lines. Its 175pF junction capacitance would severely degrade signal integrity on differential pairs operating above 100MHz. For USB SS, DP/DM, or PCIe lanes, Semtech recommends low-capacitance TVS devices such as RClamp3371ZC (<0.25pF).
Is the 1N6112AUS pin-compatible with other Semtech TDS devices like TDS2411P or TDS2011P?
No, the 1N6112AUS (TDS2211P) is not pin-compatible with TDS2411P or TDS2011P. While all share the same DFN-6 package outline, their pin functions differ: TDS2411P uses a different pin assignment for trigger control, and TDS2011P has distinct internal topology. Always verify pin configuration using the respective datasheet before substitution.
1N6112AUS 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):
- 13.7V (Max)
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.1V
- Current - Peak Pulse (10/1000µs):
- 19.9A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
1N6112AUS FAQ
1.How can I place an order for 1N6112AUS through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6112AUS 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 1N6112AUS reliable?
The price and inventory of 1N6112AUS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6112AUS is usually 5 days.
3.What payment methods are accepted for 1N6112AUS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6112AUS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6112AUS?
1N6112AUS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6112AUS 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 1N6112AUS?
For technical support, including 1N6112AUS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6112AUS requirements.
6.How does Aetrix verify that 1N6112AUS is sourced from the original manufacturer or authorized distributors?
All 1N6112AUS 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 1N6112AUS meets industry standards.
7.What is the process for return or replacement of 1N6112AUS?
All 1N6112AUS units undergo pre-shipment inspection (PSI). If there is an issue with 1N6112AUS, 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 1N6112AUS part is unused and in its original packaging.
Return procedure for 1N6112AUS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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