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Semtech Corporation 1N6109AUS
- Part No.:
- 1N6109AUS
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SQ-MELF
- Datasheet:
-
1N6109AUS.pdf
- Description:
- TVS DIODE 9.9VWM 18.2VC
- Quantity:
- Payment:
- Shipping:
Inventory:4,659
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Product details
Overview
1N6109AUS 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, 20mΩ dynamic resistance, and 175pF junction capacitance - deployed in USB Type-C PD input protection and industrial load switch inputs.
For engineers reviewing the 1N6109AUS datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, temperature-stable clamping behavior, and direct alternatives for 22V bus protection in high-reliability embedded and USB PD systems.
Technical Context
The 1N6109AUS 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 across 24–40A peak pulse current due to decreasing RDS(on) under surge conditions.
It operates over –40°C to +125°C with stable 27.5–28V clamping at 40A (1.2/50μs + 8/20μs combination waveform, RS = 2Ω), reverse stand-off voltage of 22V, breakdown voltage of 25–27.9V, and leakage <600nA at 22V - enabling robust protection without thermal derating penalties.
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 ICs (e.g., USB PD controllers) remain below damage threshold during surge. |
| 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 immunity standards without degradation. |
| Dynamic Resistance | 20mΩ - enables low-voltage overshoot and minimal power dissipation during high-current transients. |
| Junction Capacitance | 175pF at 22V, 1MHz - compatible with moderate-speed data/power lines (e.g., USB PD VBUS, load switch inputs), not high-speed differential pairs. |
Pinout & Package
1N6109AUS is housed in a RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed pad-less construction and UL 94V-0 molding compound. All six terminals are surface-mount; no thermal pad required - energy is dissipated via silicon FET channel, not junction heating.
| 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 maximize 40A capability. |
| Pins 4, 5, 6 | IN | Protected line input (e.g., VBUS, load switch VIN); parallel connection ensures uniform current sharing and optimal clamping stability. |
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 margin, simplifying system-level surge design. |
| Temperature-stable protection | Clamping remains 27.5–28V from –40°C to +125°C - removes thermal derating uncertainty present in standard TVS diodes. |
| FET-based shunt topology | Surge energy diverted through low-RDS(on) channel instead of PN-junction - avoids thermal runaway and enables repeatable multi-pulse reliability. |
| Low dynamic resistance | 20mΩ measured between 1A–40A (8/20μs) - reduces voltage overshoot during fast-rising transients (<10ns rise time). |
Applications
| USB Type-C Power Delivery Input Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting VBUS line in USB Type-C receptacles supporting up to 20V/5A PD profiles against lightning-induced surges and connector hot-plug ESD. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at connector, clamping transients before they reach PD controller or e-fuse. Use Value: Maintains 27.5–28V clamping across full temperature range and 40A surge, preventing false OVP trips and ensuring compliance with IEC 61000-4-5 Level 4. |
Use Scenario: Safeguarding input of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and factory automation equipment exposed to 42Ω/0.5μF surge coupling. IC Role / Device Role / Timing Role: Primary front-end EOS protector, limiting voltage seen by internal FET gate oxide and current-sense circuitry during line faults. Use Value: Prevents permanent damage to load switch ICs by holding clamping voltage well below absolute maximum ratings (e.g., <30V for 24V-rated devices). |
| IoT Device Power Rail Protection | Storage Device 22V Bus Protection |
Use Scenario: Securing 22V auxiliary power rails in battery-backed IoT gateways and edge nodes subjected to field ESD and induced surges from nearby AC wiring. IC Role / Device Role / Timing Role: Single-device solution replacing multi-stage TVS+MOV networks, reducing BOM count and PCB area in space-constrained modules. Use Value: Delivers 40A surge handling in 2.56mm² footprint - 60% smaller than equivalent discrete TVS arrays - while maintaining sub-28V clamping. |
Use Scenario: Protecting 22V intermediate bus in NVMe SSD enclosures and enterprise storage backplanes against ESD from handling and conducted surges from shared PSUs. IC Role / Device Role / Timing Role: Standalone rail clamp on main power input, coordinated with low-capacitance TVS on high-speed lanes (e.g., RClamp3371ZC on PCIe lanes). Use Value: Enables single-point protection without signal integrity compromise - 175pF capacitance does not degrade 22V rail stability or cause startup oscillation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Same die, identical electrical specs and package - confirmed pin-to-pin replacement per Semtech documentation and marking code T22. | No functional difference; used interchangeably in USB PD and industrial designs per Semtech's official cross-reference. | Select TDS2211P when requiring Semtech's standard part number traceability and full production support. |
| uClamp2411ZA | 24V working voltage, lower 24A IPP rating, higher 33V clamping at 24A, 12pF capacitance - optimized for CC/SBU lines, not VBUS. | Not suitable for 22V power rail protection; intended for low-capacitance, low-voltage signaling lines only. | Choose uClamp2411ZA only for auxiliary control lines (CC, SBU); avoid for VBUS or load switch inputs due to insufficient IPP and excessive clamping. |
Compared with 1N6109AUS, TDS2211P offers identical performance and drop-in compatibility, while uClamp2411ZA serves a different voltage/capacitance niche and cannot substitute in power-line roles - making TDS2211P the only validated functional alternative for 22V bus protection.
Availability
1N6109AUS is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and IoT 22V power rail protection requiring stable component supply, long-term lifecycle assurance, and full compliance with IEC 61000-4-2/4-4/4-5 standards.
Supply support for 1N6109AUS 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 1N6109AUS belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 22V power and interface protection where stable clamping and temperature independence are critical.
FAQ
What is the exact package type and dimensions of the 1N6109AUS?
The 1N6109AUS uses a DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with no exposed thermal pad. Pins 1–3 are GND; pins 4–6 are IN. All six terminals must be soldered - unconnected pins degrade surge performance. Land pattern follows Semtech's recommended 0.30mm pad width and 0.50mm pitch.
Does the 1N6109AUS meet IEC 61000-4-5 Level 4 surge immunity?
Yes - the 1N6109AUS is rated for 40A peak pulse current (8/20μs) and ±1kV (1.2/50μs, RS = 42Ω) per IEC 61000-4-5, satisfying Level 4 requirements for industrial environments. Its 27.5–28V clamping at 40A ensures protected circuits remain within safe operating limits during full-scope testing.
How does the clamping voltage of the 1N6109AUS behave across temperature?
The 1N6109AUS maintains 27.5–28V clamping from –40°C to +125°C at 40A, with negligible drift. This contrasts sharply with standard TVS diodes, whose clamping rises significantly with temperature. The stability stems from its FET-based shunt architecture, not PN-junction conduction.
Can the 1N6109AUS be used on high-speed data lines like USB SuperSpeed or PCIe?
No - the 1N6109AUS has 175pF junction capacitance, which would severely degrade signal integrity on >1Gbps differential lanes. It is intended solely for power lines (VBUS, load switch inputs) and low-speed control signals. For SuperSpeed lanes, Semtech recommends RClamp3371ZC (0.25pF) instead.
Is the 1N6109AUS pin-compatible with other Semtech TDS devices like TDS2411P?
No - the 1N6109AUS (22V) shares the same DFN-6 package and pinout as TDS2211P but differs from TDS2411P (24V), which uses a distinct 6-pin configuration with separate enable/control pins. Only TDS2211P is a verified pin-to-pin replacement for 1N6109AUS per Semtech's official documentation.
1N6109AUS 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):
- 27.5A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
1N6109AUS FAQ
1.How can I place an order for 1N6109AUS through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6109AUS 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 1N6109AUS reliable?
The price and inventory of 1N6109AUS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6109AUS is usually 5 days.
3.What payment methods are accepted for 1N6109AUS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6109AUS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6109AUS?
1N6109AUS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6109AUS 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 1N6109AUS?
For technical support, including 1N6109AUS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6109AUS requirements.
6.How does Aetrix verify that 1N6109AUS is sourced from the original manufacturer or authorized distributors?
All 1N6109AUS 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 1N6109AUS meets industry standards.
7.What is the process for return or replacement of 1N6109AUS?
All 1N6109AUS units undergo pre-shipment inspection (PSI). If there is an issue with 1N6109AUS, 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 1N6109AUS part is unused and in its original packaging.
Return procedure for 1N6109AUS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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