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Semtech Corporation 1N6120
- Part No.:
- 1N6120
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- Axial
- Datasheet:
-
1N6120.pdf
- Description:
- TVS DIODE 29.7VWM 56.2VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:9,010
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Product details
Overview
1N6120 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, and 20mΩ dynamic resistance - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.
For engineers reviewing the 1N6120 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, clamping stability across temperature and current, functional comparison vs. conventional TVS diodes, and validated alternatives for 22V bus protection in USB PD, IoT, and industrial equipment.
Technical Context
The 1N6120 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 - enabling near-constant clamping voltage independent of peak pulse current magnitude. Its operation differs fundamentally from PN-junction TVS diodes, which exhibit linear VC = VBR + IPP × RDYN behavior.
Clamping remains stable from −40°C to +125°C due to low RDS(on) reduction under surge, with guaranteed 27.5–28V clamping at both 24A and 40A (1.2/50μs voltage + 8/20μs current combination waveform, RS = 2Ω), and junction capacitance of 175pF at 22V/1MHz - optimized for DC bus and medium-speed signal line protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC operating voltage of 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. |
| 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 per IEC 61000-4-2 - exceeds automotive and industrial ESD immunity requirements for connector-facing protection. |
| Dynamic Resistance | 20mΩ - enables flat clamping curve; reduces voltage rise under increasing surge current unlike TVS diodes. |
| Junction Capacitance | 175pF at 22V/1MHz - suitable for DC power rails and low-to-medium speed data lines (e.g., CC/SBU in USB-C), not high-speed SS lanes. |
| Package | DFN 1.6mm × 1.6mm × 0.55mm, 6-lead - enables ultra-compact placement adjacent to connectors with minimal PCB area and thermal mass. |
Pinout & Package
1N6120 is housed in a Pb-free, RoHS-compliant DFN-6 package (1.6mm × 1.6mm × 0.55mm) with exposed thermal pad not required - energy dissipation occurs within the silicon FET structure. All six terminals must be connected for full 40A surge rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path for surge current; all three pins must be tied to solid ground plane via multiple vias to minimize inductance. |
| Pins 4, 5, 6 | IN | Parallel-connected input terminals for protected line (e.g., VBUS); all three must be routed together to ensure balanced current sharing and full 40A rating. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies <0.5V from 24A to 40A - eliminates need for overrating IPP to meet voltage margin, simplifying selection. |
| Temperature-stable protection | Clamping holds 27–28V across −40°C to +125°C - removes derating uncertainty present in TVS diodes whose VC rises with temperature. |
| Low dynamic resistance | 20mΩ enables sub-1V IR drop at 40A - critical for maintaining tight voltage margins on 22V systems with sensitive downstream regulators or switches. |
| Integrated FET-based shunt | Replaces discrete TVS + MOSFET active clamp designs - reduces BOM count, layout complexity, and failure modes versus multi-component solutions. |
Applications
| USB Type-C Power Delivery Input Protection | Industrial Load Switch Front-End Protection |
|---|---|
Use Scenario: Protecting VBUS lines in USB-C receptacles supporting up to 20V/5A PD, exposed to lightning-induced surges and hot-plug ESD. IC Role / Device Role / Timing Role: Primary EOS shunt device placed immediately after connector, clamping transients before they reach PD controller or load switch. Use Value: Maintains 27.5–28V clamping at full 40A surge and across full temperature range - prevents false OVP trips and guarantees controller survival where standard TVS would exceed 35V at 125°C. |
Use Scenario: Safeguarding input of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and factory automation equipment. IC Role / Device Role / Timing Role: First-line transient diverter upstream of the load switch's internal FET, limiting drain-source voltage during surge events. Use Value: Keeps VDS of protected load switch below absolute maximum rating by clamping to ≤28V - avoids catastrophic FET failure during 1kV/42Ω surges common in industrial environments. |
| IoT Device DC Power Rail Protection | Storage Device 22V Backup Supply Protection |
Use Scenario: Securing 22V auxiliary power inputs in battery-backed smart sensors and edge gateways subject to field ESD and induced surges. IC Role / Device Role / Timing Role: Standalone transient suppressor on main DC input rail, replacing bulkier TVS arrays or varistors. Use Value: 1.6mm × 1.6mm footprint saves >60% board space vs. comparable 22V TVS diodes while delivering higher surge rating and tighter clamping control. |
Use Scenario: Protecting 22V backup power inputs in NVMe SSDs and enterprise storage controllers against power-rail transients during hot-swap or supply fault conditions. IC Role / Device Role / Timing Role: Low-capacitance (175pF), low-leakage (≤600nA @ 22V) protector on non-high-speed power domain. Use Value: Prevents latch-up or oxide damage in PMICs and charge management ICs by limiting surge voltage to 28V - without adding signal integrity risk from excessive capacitance. |
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; no constant-clamp behavior; VC rises to ~42V at 40A and increases with temperature. | Higher clamping voltage limits use in 24V-systems with narrow margins; requires larger derating for high-temp operation. | Select only if cost sensitivity outweighs clamping precision and thermal stability requirements. |
| TDS2211P | Same family, identical specs and package - direct manufacturer-recommended replacement with identical marking (T22 prefix) and qualification. | No functional or layout change required; fully interchangeable in design and procurement. | Preferred for new designs requiring guaranteed 28V clamping and production continuity; same die, same test flow, same reliability data. |
Compared with SMAJ22A, 1N6120 delivers 14V lower clamping at rated current and stable performance across temperature - enabling robust 24V-system protection without derating. Versus TDS2211P, 1N6120 is functionally identical but may reflect alternate distribution channel or date-code batch; no electrical or mechanical distinction exists.
Availability
1N6120 is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, IoT device power rails, and storage system backup supplies requiring stable component supply, long-term lifecycle support, and consistent surge performance.
Supply support for 1N6120 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 1N6120 belongs to Semtech's Transient Diverting Suppressor (TDS) product line - engineered to replace conventional TVS diodes in demanding 20–30V applications where clamping voltage stability, temperature independence, and high surge current handling are critical.
FAQ
What is the key functional difference between 1N6120 and standard TVS diodes like SMAJ22A?
The 1N6120 uses an actively triggered FET-based shunt architecture, resulting in near-constant clamping voltage (27.5–28V) across its full 40A surge range and from −40°C to +125°C. In contrast, SMAJ22A - a passive PN-junction TVS - exhibits rising clamping voltage with both current and temperature, reaching ~42V at 40A and significantly higher at elevated temperatures. This makes 1N6120 uniquely suited for 24V-systems with tight voltage margins.
Does 1N6120 require a thermal pad or heatsink on the PCB?
No. The 1N6120 dissipates surge energy within its silicon FET structure rather than at a PN junction, eliminating the need for external thermal management. Its DFN-6 package has no exposed thermal pad, and the datasheet explicitly states "no thermal pad is needed." Layout focus should instead be on low-inductance grounding (multiple vias to solid ground plane) and short, direct routing of pins 4–6 to the protected line.
Can 1N6120 be used to protect high-speed data lines such as USB SuperSpeed (SS) differential pairs?
No. With 175pF junction capacitance at 22V, the 1N6120 introduces excessive loading for USB SS (5–10Gbps), PCIe, or DisplayPort lanes, which require <0.3pF protection devices. It is intended exclusively for DC power rails and low-to-medium speed control lines (e.g., USB-C CC, SBU, or DP/DM). For SS lanes, Semtech recommends RClamp3371ZC (<0.25pF) alongside 1N6120 in complete USB-C protection schemes.
What is the significance of the 20mΩ dynamic resistance specification for 1N6120?
The 20mΩ dynamic resistance reflects the effective on-resistance of the internal surge-rated FET when fully triggered. This ultra-low value ensures minimal IR drop under surge current - for example, just 0.8V additional voltage rise at 40A - enabling precise clamping control and preventing overshoot beyond the 28V limit. It directly enables the flat clamping curve that distinguishes 1N6120 from conventional TVS diodes with fixed, higher RDYN.
Is 1N6120 compatible with lead-free reflow soldering processes?
Yes. The 1N6120 is Pb-free, halogen-free, and RoHS/WEEE compliant, with a lead finish qualified for standard JEDEC J-STD-020D reflow profiles. Its DFN package withstands peak temperatures up to 260°C for 30 seconds, matching IPC-A-610 Class 3 requirements. No special solder paste or profile adjustments are needed beyond standard lead-free assembly practices.
1N6120 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):
- 29.7V (Max)
- Voltage - Breakdown (Min):
- 35.1V
- Voltage - Clamping (Max) @ Ipp:
- 56.2V
- Current - Peak Pulse (10/1000µs):
- 8.9A
- 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
1N6120 FAQ
1.How can I place an order for 1N6120 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6120 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 1N6120 reliable?
The price and inventory of 1N6120 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6120 is usually 5 days.
3.What payment methods are accepted for 1N6120?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6120 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6120?
1N6120 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6120 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 1N6120?
For technical support, including 1N6120 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6120 requirements.
6.How does Aetrix verify that 1N6120 is sourced from the original manufacturer or authorized distributors?
All 1N6120 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 1N6120 meets industry standards.
7.What is the process for return or replacement of 1N6120?
All 1N6120 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6120, 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 1N6120 part is unused and in its original packaging.
Return procedure for 1N6120:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6120 Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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