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Semtech Corporation 1N6118AUS
- Part No.:
- 1N6118AUS
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SQ-MELF
- Datasheet:
-
1N6118AUS.pdf
- Description:
- TVS DIODE 25.1VWM 45.7VC
- Quantity:
- Payment:
- Shipping:
Inventory:5,564
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Product details
Overview
1N6118AUS 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, Type-C VBus, and load switch inputs in industrial and portable electronics.
For engineers reviewing the 1N6118AUS datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, DFN-6 package layout guidance, real-world clamping stability across temperature and current, and validated alternatives for 22V bus protection design.
Technical Context
The 1N6118AUS 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. Unlike conventional TVS diodes, its clamping voltage remains nearly constant - 27.5–28V across 24–40A and −40°C to +125°C - due to decreasing RDS(on) under surge conditions.
It operates with 22V reverse stand-off voltage (VRWM), 25–27.9V breakdown (VBR at 1mA), and only 175pF junction capacitance at 22V/1MHz, enabling use on high-speed power rails without signal integrity degradation. Its DFN-6 (1.6×1.6×0.55mm) package integrates three parallel input terminals (Pins 4–6) and three ground terminals (Pins 1–3) to maximize surge current handling and minimize parasitic inductance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V reverse stand-off (VRWM) - defines maximum continuous DC bus voltage before leakage rises significantly. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave, RS=2Ω) - ensures protected 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 (measured 1–40A, 8/20μs) - enables flat clamping curve and low voltage overshoot during fast transients. |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough for 20V power rail protection without affecting load switch response or PD negotiation timing. |
| Operating Temp | −40°C to +125°C - supports operation in harsh environments including industrial motor drives and outdoor IoT gateways. |
Pinout & Package
1N6118AUS is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with UL 94V-0 molding compound. The package features three dedicated input terminals and three ground terminals to distribute surge current and reduce bond wire inductance.
| 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 for full 40A capability. |
| Pins 4, 5, 6 | IN | Parallel-connected surge input node; connects directly to protected line (e.g., VBus); all three required for rated performance. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across 24–40A and −40°C to +125°C - eliminates derating uncertainty in thermal design. |
| FET-based shunt topology | Replaces PN-junction TVS with <0.1Ω RDS(on) - dissipates energy in channel rather than junction, improving reliability under repeated surges. |
| Low dynamic resistance | 20mΩ measured over full surge range - minimizes voltage overshoot during sub-microsecond EFT events (IEC 61000-4-4). |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 5kHz & 100kHz bursts) - protects against switching noise in motor drives and SMPS-powered systems. |
| Space-optimized DFN | 1.6×1.6mm footprint - saves >60% board area vs. SO-8 or SOT-23 TVS solutions rated for equivalent 40A surge. |
Applications
| USB Type-C Power Delivery Bus 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, lightning-induced surges, and hot-plug transients. IC Role / Device Role / Timing Role: Primary high-energy shunt protector placed between connector and PD controller/load switch, clamping transients before they reach sensitive silicon. Use Value: Maintains 27.5–28V clamping across temperature and current - avoids overvoltage damage to PD controllers even at 125°C ambient. |
Use Scenario: Safeguarding input pins of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and factory automation equipment. IC Role / Device Role / Timing Role: Front-end EOS suppressor that limits voltage seen by internal FET gate oxide and drain-source junction during surge events. Use Value: Prevents latch-up or permanent failure of load switches by holding clamping voltage well below their absolute maximum ratings (e.g., <30V). |
| IoT Gateway Power Rail Protection | Storage Device 22V Backup Supply Protection |
|
Use Scenario: Securing 22V auxiliary power rails in cellular/Wi-Fi 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 fuse and downstream LDOs. Use Value: Delivers 40A surge handling in minimal area while maintaining stable clamping - critical where enclosure grounding is limited. |
Use Scenario: Protecting 22V backup battery or supercapacitor supply lines in enterprise SSDs and NAS enclosures subject to system-level ESD and surge. IC Role / Device Role / Timing Role: Low-capacitance (175pF), low-leakage (≤600nA) protector ensuring no impact on backup hold-up time or standby current. Use Value: Enables robust 22V rail protection without compromising storage device power budget or data retention window. |
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 manufacturer, identical electrical specs and package - direct replacement with identical marking (T22 prefix) and reel packaging. | No functional difference; used interchangeably in Semtech reference designs for USB-C and load switch protection. | Select TDS2211P when sourcing from authorized Semtech channels with full traceability and compliance documentation. |
| SMAJ22A | Standard unidirectional TVS diode; 22V VRWM, 35.5V VC @ 12.3A (8/20μs), higher clamping (+8V), no temperature stability guarantee. | Higher clamping voltage risks PD controller damage at elevated temperatures; unsuitable for 40A surge or precise 22V rail protection. | Choose SMAJ22A only for cost-sensitive, non-critical 22V lines where clamping margin >13V is acceptable and surge rating ≤12A suffices. |
Compared with TDS2211P and SMAJ22A, the 1N6118AUS delivers identical performance to TDS2211P but may differ in date-code marking or tape-and-reel logistics, whereas SMAJ22A requires significant derating for temperature and current - making 1N6118AUS the optimal choice for high-reliability 22V bus protection.
Availability
1N6118AUS is available at Aetrix Electronics and suitable for USB Type-C PD systems, industrial load switch inputs, and IoT gateway power rails requiring stable component supply, full RoHS/REACH compliance, and guaranteed surge performance across temperature extremes.
Supply support for 1N6118AUS 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, power management, and transient protection.
The 1N6118AUS belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-reliability 20–24V power rail protection where stable clamping and thermal resilience are mandatory.
FAQ
What is the exact package type and dimensions of the 1N6118AUS?
The 1N6118AUS uses a DFN-6 package with nominal dimensions of 1.6mm × 1.6mm × 0.55mm. It features three input terminals (Pins 4–6) and three ground terminals (Pins 1–3) arranged in a 2×3 grid. Land pattern recommendations and outline drawings are provided in Semtech's official datasheet Rev 2.5.
Does the 1N6118AUS meet IEC 61000-4-5 surge immunity standards?
Yes, the 1N6118AUS is rated for 40A peak pulse current under the IEC 61000-4-5 8/20μs waveform and also supports ±1kV combination wave (1.2/50μs voltage + 8/20μs current, RS=42Ω) for unsymmetrical lines - satisfying Level 4 industrial surge immunity requirements.
How does the clamping voltage of the 1N6118AUS behave across temperature and current?
The 1N6118AUS maintains a clamping voltage of 27.5–28V across its full rated range: 24–40A peak pulse current and −40°C to +125°C operating temperature. This stability results from its FET-based shunt architecture and is confirmed in Figure 3 and Table 2 of the datasheet.
Can the 1N6118AUS be used to protect USB Type-C CC or SBU lines?
No - the 1N6118AUS is optimized for 22V power rail protection (e.g., VBus) and is not suitable for low-voltage, high-speed data lines like CC or SBU. For those, Semtech recommends uClamp2411ZA (24V, low capacitance) or RClamp3371ZC (<0.25pF) to avoid signal distortion.
Is the 1N6118AUS pin-compatible with standard TVS diodes like SMAJ22A?
No - the 1N6118AUS uses a 6-pin DFN package with three parallel input and three ground terminals, while SMAJ22A is a 2-pin DO-214AC package. They differ fundamentally in pin count, layout, and connection methodology; PCB redesign is required for substitution.
1N6118AUS 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):
- 25.1V (Max)
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 10.9A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
1N6118AUS FAQ
1.How can I place an order for 1N6118AUS through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6118AUS 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 1N6118AUS reliable?
The price and inventory of 1N6118AUS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6118AUS is usually 5 days.
3.What payment methods are accepted for 1N6118AUS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6118AUS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6118AUS?
1N6118AUS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6118AUS 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 1N6118AUS?
For technical support, including 1N6118AUS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6118AUS requirements.
6.How does Aetrix verify that 1N6118AUS is sourced from the original manufacturer or authorized distributors?
All 1N6118AUS 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 1N6118AUS meets industry standards.
7.What is the process for return or replacement of 1N6118AUS?
All 1N6118AUS units undergo pre-shipment inspection (PSI). If there is an issue with 1N6118AUS, 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 1N6118AUS part is unused and in its original packaging.
Return procedure for 1N6118AUS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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