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Semtech Corporation 1N6108A
- Part No.:
- 1N6108A
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- Axial
- Datasheet:
-
1N6108A.pdf
- Description:
- TVS DIODE 9.1VWM 16.9VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:8,568
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Product details
Overview
1N6108A 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, 20mΩ dynamic resistance, and 175pF junction capacitance at 22V - deployed in USB PD, USB Type-C, and industrial load switch input protection.
For engineers reviewing the 1N6108A 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 where conventional TVS diodes exhibit rising clamping voltage with current or temperature.
Technical Context
The 1N6108A uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that senses overvoltage events and rapidly turns on the shunt path to ground. Unlike standard TVS diodes, its clamping voltage remains nearly constant across 1A–40A (8/20μs) 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 (It = 1mA), and leakage current ≤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 leakage or conduction. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave, RS = 2Ω) - ensures downstream 24V-rated ICs (e.g., USB PD controllers) remain below damage threshold during surge. |
| Peak Pulse Current | 40A (8/20μs) - supports compliance with IEC 61000-4-5 Level 4 (±1kV, RS = 42Ω, CS = 0.5μF) on unsymmetrical lines. |
| Dynamic Resistance | 20mΩ - enables flat clamping response; voltage rise per amp is <0.02V/A, minimizing VC drift across surge range. |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough for 22V power rail protection without signal integrity impact on adjacent traces. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds industrial and consumer ESD immunity requirements for connector-facing protection. |
Pinout & Package
1N6108A is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with UL 94V-0 molding compound. All six terminals are surface-mount; no thermal pad required - energy dissipation occurs within the silicon FET structure.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path for surge current; all three must be connected to maximize current sharing and minimize parasitic inductance. |
| Pins 4, 5, 6 | IN | Protected line input (e.g., VBus, load switch VIN); all three pins are internally paralleled and must be tied together externally for full 40A rating. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based clamping architecture | Delivers near-constant VC across 1–40A and –40°C to +125°C - eliminates thermal derating and current-dependent voltage overshoot seen in TVS diodes. |
| Low dynamic resistance | 20mΩ enables sub-1V delta-V across full surge range - critical for protecting 24V-tolerant interfaces without margin erosion. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz & 5kHz bursts) - sustains operation during repetitive fast transients in industrial control environments. |
| Compact DFN footprint | 1.6mm × 1.6mm saves >60% board area vs. SO-8 or SOT-23 TVS solutions rated for equivalent 40A surge capability. |
Applications
| USB Type-C Power Delivery Bus 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 at connectors and lightning-induced surges on long cables. IC Role / Device Role / Timing Role: Primary EOS shunt device placed directly at Type-C receptacle, clamping transients before they reach PD controller or load switch. Use Value: Maintains 27.5–28V clamping at 40A and 125°C - avoids overvoltage damage to 24V-rated PD controllers where conventional TVS would exceed 35V at same conditions. |
Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and IoT gateways subjected to field-installed wiring surges. IC Role / Device Role / Timing Role: Front-end transient diverter that limits voltage across load switch FET's drain-source during 1kV/42Ω surges, preventing avalanche failure or gate oxide stress. Use Value: Clamps within 28V at full 40A, keeping VDS below 80% of typical 30V load switch breakdown - extends reliability and eliminates need for oversized FETs. |
| High-Voltage Industrial I/O Protection | Storage Device Power Rail Protection |
Use Scenario: Securing 22V auxiliary rails in programmable logic controllers (PLCs), motor drives, and factory automation equipment interfacing with external sensors or actuators. IC Role / Device Role / Timing Role: Single-device solution for 22V bus protection against ESD, EFT, and surge - replacing multi-component TVS+MOV stacks. Use Value: Delivers 40A surge handling and ±30kV ESD in one DFN-6 package, reducing BOM count and PCB space while ensuring consistent clamping across wide temperature range. |
Use Scenario: Shielding 22V power inputs of NVMe SSD enclosures, SAS backplanes, and enterprise storage controllers from hot-plug transients and backplane coupling. IC Role / Device Role / Timing Role: Fast-acting shunt protector located at board edge, diverting energy before it propagates into sensitive PMICs or flash controller power domains. Use Value: 175pF capacitance minimizes impedance mismatch on 22V supply lines; stable clamping prevents brownout or reset events during repeated 1kV surges. |
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; same manufacturer, same datasheet revision - confirmed drop-in replacement with identical marking (T22). | Same use cases: USB PD, load switch input, industrial 22V rails. | Select TDS2211P when requiring Semtech's official part number traceability and full documentation alignment. |
| SP1003-220K | TVS diode array (SOD-323); 22V VRWM, 35.5V VC @ 24A (8/20μs), 300pF, ±30kV ESD - higher clamping, higher capacitance, no FET-based flat response. | Suitable only where 22V working voltage and ±30kV ESD are primary needs; not recommended for high-temp or high-IPP scenarios requiring stable VC. | Choose SP1003-220K only if cost sensitivity outweighs clamping stability and board space constraints. |
Compared with 1N6108A, TDS2211P offers identical performance and fit, while SP1003-220K trades clamping flatness and low capacitance for lower unit cost - making 1N6108A optimal for thermally demanding, high-reliability 22V bus protection where VC margin is critical.
Availability
1N6108A is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and 22V storage device power rails requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/WEEE compliance.
Supply support for 1N6108A 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, sensing, and connectivity.
The 1N6108A belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-energy, temperature-critical 22V bus protection applications with superior clamping stability and surge robustness.
FAQ
What is the maximum continuous operating voltage for the 1N6108A?
The 1N6108A has a reverse stand-off voltage (VRWM) of 22V, meaning it can continuously block up to 22V DC or RMS without significant leakage or conduction. This makes it suitable for nominal 20V USB PD buses and 22V industrial power rails where sustained voltage exposure occurs.
How does the 1N6108A achieve stable clamping voltage across temperature and current?
The 1N6108A uses a surge-rated FET activated by a precision trigger circuit. As peak pulse current increases, the FET's RDS(on) decreases, counteracting voltage rise - resulting in 27.5–28V clamping from 1A to 40A and –40°C to +125°C. This contrasts with TVS diodes whose VC rises linearly with both current and temperature.
Is the 1N6108A pin-compatible with other Semtech TDS devices?
The 1N6108A shares the same DFN-6 package, pin configuration (Pins 1–3 = GND, Pins 4–6 = IN), and layout guidelines as TDS2211P. It is functionally and physically interchangeable with TDS2211P, including identical marking code (T22) and tape-and-reel packaging (3,000 units per 7″ reel).
What is the junction capacitance of the 1N6108A, and why does it matter?
The 1N6108A exhibits 175pF junction capacitance at 22V and 1MHz. This low value prevents signal distortion or power rail instability on 22V supply lines, especially important in high-speed storage interfaces and compact USB-C designs where parasitic loading must be minimized.
Can the 1N6108A protect against both ESD and surge events?
Yes - the 1N6108A is rated for ±30kV contact and air discharge (IEC 61000-4-2), ±4kV EFT bursts (IEC 61000-4-4), and 40A 8/20μs surges (IEC 61000-4-5). Its FET-based architecture handles fast ESD edges and high-energy surges in a single device, eliminating the need for cascaded protection stages.
1N6108A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- Axial
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 9.1V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.9V
- Current - Peak Pulse (10/1000µs):
- 29.6A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
1N6108A FAQ
1.How can I place an order for 1N6108A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6108A 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 1N6108A reliable?
The price and inventory of 1N6108A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6108A is usually 5 days.
3.What payment methods are accepted for 1N6108A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6108A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6108A?
1N6108A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6108A 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 1N6108A?
For technical support, including 1N6108A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6108A requirements.
6.How does Aetrix verify that 1N6108A is sourced from the original manufacturer or authorized distributors?
All 1N6108A 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 1N6108A meets industry standards.
7.What is the process for return or replacement of 1N6108A?
All 1N6108A units undergo pre-shipment inspection (PSI). If there is an issue with 1N6108A, 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 1N6108A part is unused and in its original packaging.
Return procedure for 1N6108A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6108A Tags
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