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Semtech Corporation 1N6124US
- Part No.:
- 1N6124US
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SQ-MELF
- Datasheet:
-
1N6124US.pdf
- Description:
- TVS DIODE 42.6VWM 80.7VC
- Quantity:
- Payment:
- Shipping:
Inventory:6,062
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Product details
Overview
1N6124US 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 - deployed in USB PD, USB Type-C, and industrial load switch input protection.
For engineers reviewing the 1N6124US datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, real-world clamping stability across temperature and current, and direct alternatives for 22V bus protection design.
Technical Context
The 1N6124US employs a surge-rated FET as its primary protection element, activated by a precision trigger circuit that initiates shunting when transient voltage exceeds breakdown threshold. Unlike conventional TVS diodes, its clamping voltage remains nearly constant due to decreasing RDS(on) under surge conditions.
It operates over –40°C to +125°C with stable 27.5–28V clamping across 24–40A (1.2/50μs + 8/20μs combination waveform, RS = 2Ω), and maintains <600nA reverse leakage at 22V, enabling reliable protection in thermally demanding industrial and portable applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - matches nominal USB PD bus and industrial 24V rail derating requirements. |
| Clamping Voltage | 27.5–28V at 40A - stays below typical 30V damage thresholds of USB PD controllers and load switches. |
| Peak Pulse Current | 40A (8/20μs) - satisfies IEC 61000-4-5 Level 4 surge immunity for industrial equipment. |
| ESD Withstand | ±30kV contact/air per IEC 61000-4-2 - exceeds automotive and consumer ESD robustness standards. |
| Dynamic Resistance | 20mΩ - enables low-voltage overshoot during fast transients, critical for sensitive downstream ICs. |
| Junction Capacitance | 175pF at 22V - compatible with DC/low-frequency power line protection; not suited for high-speed data lines. |
| Operating Temp | –40°C to +125°C - supports extended-range operation in industrial enclosures and automotive under-hood proximity. |
Pinout & Package
1N6124US is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no solder mask defined). All six terminals must be connected - three GND pins for low-inductance return path and three IN pins for parallel surge current handling - to achieve rated 40A performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground connection; all three must be tied to solid ground plane via multiple vias to minimize parasitic inductance during surge events. |
| Pins 4, 5, 6 | IN | Protected line input; parallel connection ensures uniform current sharing and full 40A rating - single-pin use de-rates performance. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V from 24A to 40A - eliminates need for over-specifying IPP to meet voltage margin. |
| Temperature-stable clamping | Clamps at ~27.6V across –40°C to +125°C - removes thermal derating calculations required for standard TVS diodes. |
| FET-based shunt topology | Dissipates energy in low-RDS(on) channel rather than PN junction - improves reliability and cycle life under repeated surges. |
| Low dynamic resistance | 20mΩ measured between 1A–40A - reduces voltage overshoot during sub-microsecond rise-time transients (e.g., ESD). |
| DFN-6 footprint | 1.6mm × 1.6mm area - saves >60% board space vs. SO-8 or SOT-23 TVS solutions with comparable ratings. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting VCONN/VBUS lines in USB Type-C receptacles supporting up to 20V/5A PD negotiation. IC Role / Device Role / Timing Role: Transient diverting suppressor placed at connector entry point to clamp lightning-induced surges and contact ESD before reaching PD controller. Use Value: Maintains 27.6V clamping at 40A and 125°C - prevents latch-up or gate oxide damage in USB PD controllers rated for ≤30V absolute max. |
Use Scenario: Safeguarding input of high-side load switches (e.g., HS2950P) in remote meters, robotics, and IoT edge nodes exposed to 1kV/42Ω surges. IC Role / Device Role / Timing Role: Primary front-end EOS protector that limits voltage stress on internal FETs and OVP comparators during AC line coupling events. Use Value: Clamping stability over temperature avoids false OVP trips and preserves load switch functionality without thermal shutdown. |
| Industrial 24V DC Power Rail Protection | Notebook/Tablet DC-In Port Protection |
Use Scenario: Securing 24V auxiliary rails in PLC I/O modules and factory automation controllers subject to IEC 61000-4-5 surge testing. IC Role / Device Role / Timing Role: Standalone transient suppressor replacing multi-stage TVS+MOV designs to reduce BOM count and PCB area. Use Value: Single-device 40A capability eliminates need for paralleled TVS arrays - simplifies layout and improves surge consistency across production units. |
Use Scenario: Hardening DC-in jacks on ultrabooks and tablets against accidental 24V adapter misconnection and ESD during hot-plug events. IC Role / Device Role / Timing Role: Low-leakage (≤600nA), high-clamp-margin protector placed between barrel jack and PMIC input. Use Value: 22V working voltage tolerates 10% input tolerance while 27.6V clamping leaves ≥2.4V headroom to 30V PMIC ABS MAX rating. |
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 electrical specs, same DFN-6 package, identical marking (T22XX), and documented pinout - confirmed drop-in replacement per Semtech documentation. | Same USB PD, load switch, and 22V rail use cases; validated in Semtech reference designs (e.g., Figure 4 & 5). | Select TDS2211P when requiring manufacturer-validated design support, application notes, or direct Semtech technical engagement. |
| SMAJ22A | Standard unidirectional TVS diode; 22V VRWM, 35.5V VC @ 12.3A (8/20μs); higher clamping, lower IPP, larger SMA package. | Limited to lower-energy threats; unsuitable for 40A IEC 61000-4-5 compliance or high-temp stability-critical designs. | Choose SMAJ22A only for cost-sensitive, non-industrial applications where 35.5V clamping and 12.3A rating are acceptable. |
Compared with TDS2211P and SMAJ22A, 1N6124US delivers identical protection performance in the same compact DFN-6 footprint but may differ in traceability, date-code format, or tape-and-reel packaging - verify reel quantity and marking compliance for volume production handoffs.
Availability
1N6124US is available at Aetrix Electronics and suitable for USB Type-C PD systems, industrial load switch inputs, and 22V DC power rail protection requiring stable component supply, long-term lifecycle assurance, and consistent surge performance across temperature extremes.
Supply support for 1N6124US 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.
The 1N6124US belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-reliability 22V bus protection where stable clamping, temperature independence, and high peak current are mandatory.
FAQ
What is the maximum clamping voltage of the 1N6124US at 40A surge current?
The 1N6124US clamps at 27.5–28V under IEC 61000-4-5 combination waveform conditions (1.2/50μs voltage + 8/20μs current, RS = 2Ω) at 40A peak pulse current. This value is guaranteed across –40°C to +125°C and reflects the device's FET-based constant-clamp architecture - not a fixed VBR + IPP×RDYN relationship.
Does the 1N6124US require a thermal pad or heatsink on the PCB?
No, the 1N6124US does not require an external thermal pad or heatsink. Its DFN-6 package dissipates surge energy primarily through the low-RDS(on) FET channel, and the datasheet explicitly states "no thermal pad is needed." Instead, ensure all three GND pins (1, 2, 3) connect to a solid ground plane using multiple vias to minimize inductance and maximize current-handling capability.
Can the 1N6124US be used on high-speed data lines like USB SuperSpeed or PCIe?
No, the 1N6124US is not suitable for high-speed data lines. With 175pF junction capacitance at 22V, it would severely degrade signal integrity on differential pairs operating above ~100MHz. It is intended exclusively for DC or low-frequency power and control lines - use low-capacitance devices like RClamp3371ZC (<0.25pF) for USB SS, DP/DM, or PCIe lanes.
How does the 1N6124US differ from standard TVS diodes in surge response?
The 1N6124US uses a triggered FET shunt instead of a PN junction. When a transient exceeds the trigger threshold, the FET turns on with RDS(on) collapsing to ~20mΩ, yielding near-constant clamping voltage. Standard TVS diodes exhibit linear VC = VBR + IPP×RDYN, causing clamping to rise with current and temperature - a key limitation the 1N6124US eliminates.
Is the 1N6124US RoHS and halogen-free compliant?
Yes, the 1N6124US is Pb-free, halogen-free, and fully compliant with RoHS and WEEE directives. Its molding compound meets UL 94V-0 flammability rating, and lead finish is lead-free - confirmed in the mechanical characteristics section of the official Semtech datasheet Rev 2.5.
1N6124US 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):
- 42.6V (Max)
- Voltage - Breakdown (Min):
- 50.4V
- Voltage - Clamping (Max) @ Ipp:
- 80.7V
- Current - Peak Pulse (10/1000µs):
- 6.2A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
1N6124US FAQ
1.How can I place an order for 1N6124US through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6124US 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 1N6124US reliable?
The price and inventory of 1N6124US are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6124US is usually 5 days.
3.What payment methods are accepted for 1N6124US?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6124US transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6124US?
1N6124US orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6124US 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 1N6124US?
For technical support, including 1N6124US datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6124US requirements.
6.How does Aetrix verify that 1N6124US is sourced from the original manufacturer or authorized distributors?
All 1N6124US 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 1N6124US meets industry standards.
7.What is the process for return or replacement of 1N6124US?
All 1N6124US units undergo pre-shipment inspection (PSI). If there is an issue with 1N6124US, 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 1N6124US part is unused and in its original packaging.
Return procedure for 1N6124US:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6124US Tags
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