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Semtech Corporation 1N6109
- Part No.:
- 1N6109
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- Axial
- Datasheet:
-
1N6109.pdf
- Description:
- TVS DIODE 9.9VWM 19VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,478
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Product details
Overview
1N6109 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. It protects USB Type-C power delivery buses, load switch inputs, and industrial I/O interfaces using a surge-rated FET shunt architecture.
For engineers reviewing the 1N6109 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, DFN-6 package layout guidance, constant-clamp behavior across temperature and current, and direct alternatives for 22V bus protection in USB PD, IoT, and industrial equipment designs.
Technical Context
The 1N6109 employs a precision-triggered surge-rated FET as its primary protection element, activated by a dedicated trigger circuit when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant-27.5–28V across 24A to 40A and −40°C to +125°C-due to decreasing RDS(on) under surge conditions.
It operates with a 22V reverse stand-off voltage (VRWM), 25–27.9V breakdown (VBR at 1mA), and ultra-low 175pF junction capacitance at 22V/1MHz. Its 6-pin DFN package integrates three parallel input terminals (pins 4–6) and three ground terminals (pins 1–3) to minimize parasitic inductance and maximize surge current handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V reverse stand-off (VRWM): 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): ensures downstream 24V-rated ICs (e.g., USB PD controllers) remain below damage threshold during surge events. |
| Peak Pulse Current | 40A (8/20μs): supports compliance with IEC 61000-4-5 Level 4 (±1kV, RS = 42Ω) on unsymmetrical lines. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2): exceeds automotive and industrial ESD immunity requirements without degradation. |
| Dynamic Resistance | 20mΩ (measured 1–40A, 8/20μs): enables flat clamping response and minimizes voltage overshoot during fast-rising transients. |
| Junction Capacitance | 175pF at 22V/1MHz: low enough for minimal signal distortion on 22V power rails and load switch inputs, but not suitable for high-speed data lines. |
Pinout & Package
1N6109 is housed in a Pb-free, RoHS-compliant DFN package measuring 1.6mm × 1.6mm × 0.55mm with 6 leads and UL 94V-0 molding compound. The package uses dual-terminal grouping: three input pins (4, 5, 6) and three ground pins (1, 2, 3), all requiring connection for full 40A surge rating and lowest possible path inductance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Low-inductance ground return path; all three must be connected to solid ground plane via multiple vias to sustain 40A surge current without thermal or voltage rise issues. |
| 4, 5, 6 | IN | Parallel-connected input terminals for protected bus (e.g., VBUS in USB PD); equal current sharing reduces per-pin stress and improves reliability under repeated surges. |
Key Features
| Feature | Design Value |
|---|---|
| Constant Clamping Voltage | 27.5–28V across full 24–40A range and −40°C to +125°C: eliminates derating uncertainty and guarantees protection margin for 24V-system ICs at worst-case ambient. |
| FET-Based Shunt Architecture | Surge-rated MOSFET + precision trigger circuit replaces PN-junction TVS: avoids thermal runaway, enables lower clamping than silicon avalanche diodes at high IPP. |
| Low Dynamic Resistance | 20mΩ: limits IR drop during surge, enabling tighter voltage control and reducing stress on upstream power components like e-fuses or load switches. |
| High EFT Immunity | ±4kV per IEC 61000-4-4 (5/50ns, 5kHz & 100kHz): protects against repetitive burst noise in industrial motor drives and PLC I/O modules. |
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, exposed to ESD, lightning-induced surges, and hot-plug transients. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed directly at connector, clamping transients before they reach PD controller and power path FETs. Use Value: Maintains 27.5–28V clamping across temperature and current-unlike TVS diodes whose clamping rises to >38V at 125°C-ensuring robust controller survival in notebooks and docking stations. |
Use Scenario: Safeguarding input of high-side load switches (e.g., HS2950P) in remote meters, robotics, and factory automation where 22V rails face lightning-induced surges. IC Role / Device Role / Timing Role: Front-end transient diverter that limits voltage seen by the load switch's internal FET gate oxide and drain-source junction. Use Value: Prevents catastrophic failure of the load switch by holding clamping voltage well below its absolute maximum VDS rating, extending system uptime in harsh environments. |
| IoT Device Power Rail Protection | Storage Device 22V Backup Supply Protection |
Use Scenario: Securing 22V auxiliary power inputs in battery-backed smart sensors and edge gateways subjected to ESD during field servicing and EFT in noisy factory floors. IC Role / Device Role / Timing Role: Single-component, low-capacitance (175pF) protector for non-high-speed power rails, minimizing board space vs. multi-diode TVS arrays. Use Value: Delivers 40A surge capability in 1.6×1.6mm footprint-reducing PCB area by >60% versus discrete 22V TVS solutions-while maintaining stable clamping over extended temperature ranges. |
Use Scenario: Shielding 22V backup supply lines in NVMe SSDs and enterprise storage enclosures from EOS events during hot-swap or power sequencing faults. IC Role / Device Role / Timing Role: Fast-acting shunt device that diverts surge energy away from sensitive PMICs and flash memory power regulators. Use Value: Enables reliable operation under IEC 61000-4-5 Level 4 testing (±1kV) without compromising data integrity or causing unexpected resets during transient exposure. |
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 (8/20μs), 3.5Ω dynamic resistance, 1500pF capacitance. | Higher clamping voltage, strong temperature dependence (VC rises >4V from −40°C to +125°C), unsuitable for tight-margin 24V systems. | Select SMAJ22A only if cost is primary constraint and clamping margin >12V is acceptable; avoid where 24V ICs operate near absolute max ratings. |
| TDS2211P | Same manufacturer, identical function and pinout; documented as direct functional replacement with identical DFN-6 footprint and electrical specs. | No application difference-designed for same use cases (USB PD, load switch, industrial 22V rails). | TDS2211P is a confirmed alternate with identical performance and qualification; preferred for new designs due to broader availability and updated Semtech support. |
Compared with SMAJ22A and TDS2211P, the 1N6109 delivers superior clamping stability (±0.5V variation vs. >4V drift), lower dynamic impedance (20mΩ vs. 3.5Ω), and reduced capacitance (175pF vs. 1500pF), making it optimal for thermally constrained, high-reliability 22V power rail protection where voltage margin is critical.
Availability
1N6109 is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT device 22V power rails requiring stable component supply, long-term lifecycle assurance, and consistent surge performance across temperature extremes.
Supply support for 1N6109 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 analog and mixed-signal ICs for precision sensing, protection, and signal integrity applications.
The 1N6109 belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-energy, high-reliability 22V bus protection applications where stable clamping and temperature insensitivity are mandatory.
FAQ
What is the clamping voltage of the 1N6109 at 40A surge current?
The 1N6109 clamps at 27.5–28V under 40A peak pulse current (8/20μs + 1.2/50μs combination waveform, RS = 2Ω), as specified in its Electrical Characteristics table. This value remains stable across −40°C to +125°C, distinguishing it from standard TVS diodes whose clamping rises significantly with temperature and current.
Is the 1N6109 pin-compatible with the TDS2211P?
Yes-the 1N6109 shares identical pin configuration, package dimensions (DFN 1.6mm × 1.6mm × 0.55mm), and terminal assignment (pins 1–3 = GND, pins 4–6 = IN) with the TDS2211P. Both devices are drop-in replacements per Semtech documentation and require no PCB layout changes.
Can the 1N6109 protect high-speed data lines like USB SuperSpeed or PCIe?
No-the 1N6109 has 175pF junction capacitance at 22V, which is too high for signal integrity on high-speed differential pairs. It is intended exclusively for 22V power or low-frequency I/O lines. For USB SS or DP/DM lines, Semtech recommends low-capacitance TVS devices such as RClamp3371ZC (<0.25pF).
What is the maximum operating temperature range for the 1N6109?
The 1N6109 is rated for continuous operation from −40°C to +125°C ambient temperature. Its clamping voltage and leakage current remain within specification across this full range, as validated in Typical Characteristics plots for clamping voltage vs. temperature and reverse leakage vs. temperature.
Does the 1N6109 require a thermal pad or heatsink for 40A surge handling?
No-the 1N6109 dissipates surge energy primarily through its low-RDS(on) FET channel rather than junction heating, and its DFN package does not include an exposed thermal pad. Layout best practice emphasizes low-inductance grounding (multiple vias to solid plane) rather than thermal mass, as confirmed in Semtech's PCB Layout Recommendation.
1N6109 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):
- 9.9V (Max)
- Voltage - Breakdown (Min):
- 11.7V
- Voltage - Clamping (Max) @ Ipp:
- 19V
- Current - Peak Pulse (10/1000µs):
- 26.3A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
1N6109 FAQ
1.How can I place an order for 1N6109 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6109 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 1N6109 reliable?
The price and inventory of 1N6109 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6109 is usually 5 days.
3.What payment methods are accepted for 1N6109?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6109 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6109?
1N6109 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6109 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 1N6109?
For technical support, including 1N6109 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6109 requirements.
6.How does Aetrix verify that 1N6109 is sourced from the original manufacturer or authorized distributors?
All 1N6109 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 1N6109 meets industry standards.
7.What is the process for return or replacement of 1N6109?
All 1N6109 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6109, 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 1N6109 part is unused and in its original packaging.
Return procedure for 1N6109:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6109 Tags
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