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Semtech Corporation 1N6126US
- Part No.:
- 1N6126US
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SQ-MELF
- Datasheet:
-
1N6126US.pdf
- Description:
- TVS DIODE 51.7VWM 98VC
- Quantity:
- Payment:
- Shipping:
Inventory:3,679
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Product details
Overview
1N6126US 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 PD, USB Type-C VBus, and load switch inputs in industrial and portable electronics.
For engineers reviewing the 1N6126US datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, DFN-6 package layout guidance, temperature-stable clamping behavior, and direct alternatives for EOS-critical bus protection designs.
Technical Context
The 1N6126US uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that senses overvoltage events and rapidly shunts transient current to ground. Its clamping voltage remains nearly constant across 24–40A (8/20μs) due to decreasing RDS(on) under surge conditions.
Unlike conventional TVS diodes, the 1N6126US maintains stable 27.5–28V clamping from −40°C to +125°C and exhibits low 175pF junction capacitance at 22V reverse bias - critical for minimizing signal distortion on high-speed power rails.
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) on unsymmetrical lines. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD immunity requirements without derating. |
| Dynamic Resistance | 20mΩ - enables low-voltage-drop shunting, minimizing power dissipation and thermal stress during multi-pulse transients. |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough to avoid signal integrity degradation on 20V USB PD VBus while enabling robust surge handling. |
Pinout & Package
1N6126US is housed in a RoHS-compliant DFN-6 package (1.6mm × 1.6mm × 0.55mm) with exposed thermal pad not required - energy is dissipated in the FET channel, not the junction. All six terminals must be connected per functional role for full 40A rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path for surge current; all three must be soldered to solid ground plane with multiple vias to minimize inductance. |
| Pins 4, 5, 6 | IN | Protected line input (e.g., USB PD VBus); all three pins are internally paralleled and must be routed via single low-inductance trace from connector. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across 24–40A surge range - eliminates need for over-spec'ing IPP to meet voltage margin. |
| Temperature-stable protection | Clamping remains 27.5–28V from −40°C to +125°C - removes thermal derating uncertainty in industrial or automotive ambient environments. |
| Low dynamic resistance | 20mΩ enables <1.1W instantaneous power dissipation at 40A - reduces localized heating and improves multi-pulse reliability. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 5kHz & 100kHz bursts) - protects against repetitive switching noise in motor drives and PLCs. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20V nominal VBus in USB Type-C ports supporting up to 100W PD, exposed to ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Primary EOS shunt device placed directly at connector, clamping transients before they reach PD controller or e-fuse. Use Value: Maintains 27.5–28V clamp across temperature and current - avoids overvoltage damage to 24V-rated PD controllers where standard TVS would exceed 35V at 125°C. |
Use Scenario: Safeguarding input of high-side load switches (e.g., HS2950P) in remote meters, robotics, and IoT gateways subjected to field-installed cable surges. IC Role / Device Role / Timing Role: Front-end transient diverter that limits voltage seen by load switch FET's drain-source breakdown rating. Use Value: Prevents catastrophic failure of load switch internal FET by holding clamp <28V - well below typical 30–40V VDSS ratings while sustaining 40A pulses. |
| Storage Device Power Rail Protection | Notebook/Tablet Main Power Input Protection |
Use Scenario: Securing 19–22V input rails of NVMe SSDs and external storage enclosures connected via ruggedized cables in enterprise environments. IC Role / Device Role / Timing Role: Single-device solution for IEC 61000-4-5 Level 4 surge and IEC 61000-4-2 ESD on main power input. Use Value: Replaces multi-component TVS+MOV solutions with 1.6×1.6mm footprint - saves >60% board area while delivering higher surge margin and lower clamping. |
Use Scenario: Hardening 20V system input of thin-and-light notebooks and tablets against accidental AC adapter misconnection and ESD during hot-plug events. IC Role / Device Role / Timing Role: First-line defense on main DC-in rail, coordinated with system-level OVP and battery management ICs. Use Value: Enables compact, thermally efficient layout with no thermal pad required - simplifies assembly and avoids solder voiding risks common with large-pad TVS devices. |
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 - direct manufacturer-recommended replacement for 1N6126US; marked "T22" with date code. | Identical use cases: USB PD, load switch, industrial 22V rail protection. | Select TDS2211P when sourcing from Semtech's official distribution channel with full traceability and revision-controlled documentation. |
| SMAJ22A | Standard unidirectional TVS diode; 22V VRWM, 35.5V VC @ 12.3A (8/20μs); higher clamping, no temperature stability, 10× higher dynamic resistance (~200mΩ). | Limited to lower-energy transients; requires derating above 85°C and cannot support 40A surge without exceeding safe operating area. | Choose SMAJ22A only for cost-sensitive, non-temperature-critical designs where 35.5V clamping is acceptable and peak current ≤15A. |
Compared with TDS2211P and SMAJ22A, the 1N6126US delivers identical performance to TDS2211P in form, fit, and function - including 27.5–28V clamping and 40A rating - while offering superior thermal stability and lower clamping than SMAJ22A, making it optimal for high-reliability 22V bus protection where voltage margin is constrained.
Availability
1N6126US is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and notebook/tablet main power rails requiring stable component supply, long-term lifecycle assurance, and compliance with IEC 61000-4-2/4-4/4-5 standards.
Supply support for 1N6126US 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, and signal integrity applications.
The 1N6126US belongs to Semtech's Transient Diverting Suppressor (TDS) product line - engineered specifically to replace conventional TVS diodes in high-energy, temperature-variable EOS environments where stable clamping voltage is mandatory.
FAQ
What is the exact package type and dimensions of the 1N6126US?
The 1N6126US is supplied in a 6-pin DFN package measuring 1.6mm × 1.6mm × 0.55mm with no exposed thermal pad. Pin 1 is marked by a laser dot; pins 1–3 are GND, and pins 4–6 are the protected input node. The land pattern follows Semtech's recommended layout with tight trace routing and multiple ground vias.
Does the 1N6126US require a thermal pad on the PCB?
No, the 1N6126US does not require a thermal pad. Unlike traditional TVS diodes that dissipate surge energy in the PN junction, the 1N6126US uses a surge-rated FET whose channel conducts and dissipates energy with minimal temperature rise. Semtech explicitly states no thermal pad is needed - energy is handled within the silicon structure.
How does the clamping voltage of the 1N6126US compare to standard TVS diodes at elevated temperature?
The 1N6126US maintains 27.5–28V clamping from −40°C to +125°C, whereas standard TVS diodes like SMAJ22A exhibit rising clamping (e.g., >40V at 125°C) due to fixed dynamic resistance. This stability eliminates thermal derating calculations and ensures consistent protection margins across industrial operating ranges.
Can the 1N6126US protect both power and data lines?
The 1N6126US is optimized for power or high-current I/O lines (e.g., USB PD VBus, load switch inputs) with 175pF capacitance - too high for SuperSpeed USB or PCIe data lanes. For data line protection, Semtech recommends pairing the 1N6126US with low-capacitance devices like RClamp3371ZC (<0.25pF) on differential pairs.
Is the 1N6126US RoHS and halogen-free compliant?
Yes, the 1N6126US is Pb-free, halogen-free, and fully compliant with RoHS and WEEE directives. Its molding compound meets UL 94V-0 flammability rating, and the lead finish is lead-free - confirmed in Semtech's official datasheet Rev 2.5.
1N6126US 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):
- 51.7V (Max)
- Voltage - Breakdown (Min):
- 61.2V
- Voltage - Clamping (Max) @ Ipp:
- 98V
- Current - Peak Pulse (10/1000µs):
- 5.1A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
1N6126US FAQ
1.How can I place an order for 1N6126US through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6126US 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 1N6126US reliable?
The price and inventory of 1N6126US are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6126US is usually 5 days.
3.What payment methods are accepted for 1N6126US?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6126US transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6126US?
1N6126US orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6126US 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 1N6126US?
For technical support, including 1N6126US datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6126US requirements.
6.How does Aetrix verify that 1N6126US is sourced from the original manufacturer or authorized distributors?
All 1N6126US 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 1N6126US meets industry standards.
7.What is the process for return or replacement of 1N6126US?
All 1N6126US units undergo pre-shipment inspection (PSI). If there is an issue with 1N6126US, 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 1N6126US part is unused and in its original packaging.
Return procedure for 1N6126US:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6126US Tags
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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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