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Semtech Corporation 1N6125AUS
- Part No.:
- 1N6125AUS
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SQ-MELF
- Datasheet:
-
1N6125AUS.pdf
- Description:
- TVS DIODE 47.1VWM 85.3VC
- Quantity:
- Payment:
- Shipping:
Inventory:6,957
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Product details
Overview
1N6125AUS 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 24–40A, and 20mΩ dynamic resistance - deployed in USB Type-C PD input protection and industrial load switch inputs.
For engineers reviewing the 1N6125AUS datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low dynamic resistance for minimal voltage overshoot, DFN-6 footprint compatibility, and compliance with IEC 61000-4-2/4-4/4-5 surge standards in space-constrained 22V bus protection designs.
Technical Context
The 1N6125AUS 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. Unlike conventional TVS diodes, its clamping voltage remains nearly constant (27.5–28V) from 24A to 40A due to decreasing RDS(on) under surge conditions.
It operates over –40°C to +125°C with stable clamping performance, 175pF junction capacitance at 22V/1MHz, and <600nA reverse leakage at VRWM - enabling reliable protection in thermally demanding USB PD, IoT, and industrial equipment without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - matches nominal USB PD bus and industrial 24V rail systems without false triggering. |
| Clamping Voltage | 27.5–28V at 24–40A (1.2/50μs + 8/20μs combo wave) - stays below 30V damage threshold of common PD controllers and load switches. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 (±1kV, RS=42Ω) for industrial surge immunity. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds Class 4 ESD requirements for external connectors. |
| Dynamic Resistance | 20mΩ - ensures minimal IR drop during surge conduction, preserving clamping accuracy under high di/dt. |
| Junction Capacitance | 175pF at 22V/1MHz - compatible with DC-coupled 22V power rails; not intended for high-speed data lines. |
Pinout & Package
1N6125AUS is housed in a RoHS-compliant DFN-6 package (1.6mm × 1.6mm × 0.55mm) with exposed thermal pad-less construction and UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return 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 or load switch VIN); parallel connection ensures uniform current distribution and full 40A rating. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based transient diversion | Enables flat clamping voltage vs. current curve - avoids voltage runaway seen in PN-junction TVS devices. |
| Stable clamping over temperature | 27.5–28V clamping maintained from –40°C to +125°C - eliminates thermal derating calculations in industrial environments. |
| Low dynamic resistance | 20mΩ ensures <1V additional overshoot at 40A - critical for protecting sensitive 22V-rated ICs like USB PD controllers. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz) - protects against repetitive fast transients in motor-driven or relay-switched systems. |
Applications
| USB Type-C Power Delivery Input Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting VBUS lines in USB-C ports supporting up to 20V/5A PD negotiation against lightning-induced surges and connector ESD. IC Role / Device Role / Timing Role: Transient diverting suppressor placed between connector and PD controller/load switch input. Use Value: Maintains 27.5–28V clamping at 40A and across temperature - prevents overvoltage damage to downstream PD controllers rated ≤30V. |
Use Scenario: Shielding enable-controlled load switches (e.g., HS2950P) in remote meters and robotics from EOS events on powered inputs. IC Role / Device Role / Timing Role: Primary front-end surge clamp on VIN pin, limiting voltage seen by internal FET gate oxide. Use Value: 20mΩ dynamic resistance and stable clamping prevent latch-up or gate rupture in integrated load switches during 8/20μs surges. |
| IoT Edge Node Power Rail Protection | Storage Device 22V Backup Supply Protection |
Use Scenario: Securing 22V auxiliary power inputs in battery-backed IoT gateways exposed to field ESD and induced surges. IC Role / Device Role / Timing Role: Single-point EOS protector on main DC input before DC-DC regulation and system management ICs. Use Value: ±30kV ESD rating and 40A surge capability ensure robustness in unshielded enclosures without requiring multi-stage protection. |
Use Scenario: Safeguarding 22V backup supply rails in NVMe SSDs and enterprise storage controllers against hot-plug transients and board-level coupling. IC Role / Device Role / Timing Role: Clamping device on 22V standby rail feeding real-time clocks and nonvolatile configuration memory. Use Value: 175pF capacitance avoids signal integrity issues on low-frequency power rails while delivering full IEC 61000-4-5 compliance. |
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 manufacturer, identical electrical specs and package; 1N6125AUS is Semtech's alternate ordering code for TDS2211P. | No functional difference - both qualify for USB PD, industrial load switch, and 22V rail protection. | Select 1N6125AUS when sourcing through distributors using this part number; verify reel packaging (3,000 pcs/reel) matches production needs. |
| SMAJ22A | Standard unidirectional TVS diode; 35.5V clamping at 12.3A (8/20μs), higher dynamic resistance (~0.5Ω), no flat-clamp behavior. | Limited to lower-energy surges; clamping rises to >40V at elevated temperature or current - unsuitable for tight 30V margin systems. | Only consider SMAJ22A if cost is primary constraint and design tolerates higher clamping voltage and thermal derating. |
Compared with TDS2211P, 1N6125AUS offers identical performance as a direct Semtech-marketed variant, while SMAJ22A provides lower-cost but thermally and electrically inferior clamping - making 1N6125AUS optimal where consistent sub-30V protection across temperature and current is mandatory.
Availability
1N6125AUS is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and IoT edge node power rails requiring stable component supply with guaranteed IEC 61000-4-2/4-4/4-5 compliance.
Supply support for 1N6125AUS 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 1N6125AUS belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in 22V+ power and interface protection with superior clamping stability and surge handling.
FAQ
What is the exact package type and dimensions of the 1N6125AUS?
The 1N6125AUS is packaged in a 6-pin DFN (Dual Flat No-lead) case measuring 1.6mm × 1.6mm × 0.55mm with exposed pad-less construction. Pin 1 is marked by a laser dot; pins 1–3 are GND, pins 4–6 are IN. This compact footprint supports high-density PCB layouts in USB-C and industrial modules.
Does the 1N6125AUS meet IEC 61000-4-5 surge immunity requirements?
Yes, the 1N6125AUS is rated for 40A peak pulse current (8/20μs waveform) and complies with IEC 61000-4-5 Level 4 (±1kV, RS = 42Ω, CS = 0.5μF) for unsymmetrical lines. Its 27.5–28V clamping voltage at full 40A ensures protected circuits remain within safe operating limits during standardized surge events.
How does the 1N6125AUS differ from standard TVS diodes like SMAJ22A?
The 1N6125AUS uses an active FET-based architecture that delivers flat clamping voltage (27.5–28V) across 24–40A and –40°C to +125°C, unlike SMAJ22A's passive PN-junction design, which exhibits rising clamping (>35V) with current and temperature. This makes 1N6125AUS more reliable for 22V systems with tight voltage margins.
Can the 1N6125AUS be used on high-speed data lines such as USB SuperSpeed differential pairs?
No, the 1N6125AUS is not suitable for high-speed data lines. With 175pF junction capacitance at 22V, it would severely degrade signal integrity on USB 3.x, PCIe, or DisplayPort lanes. It is intended exclusively for DC-coupled power or low-frequency control lines - use low-capacitance devices like RClamp3371ZC for data-line protection.
Is the 1N6125AUS pin-compatible with other Semtech TDS devices?
The 1N6125AUS shares the same DFN-6 footprint and pinout (GND on pins 1–3, IN on pins 4–6) as TDS2211P and is functionally identical. However, it is not pin-compatible with other TDS variants like TDS1211P (12V) or TDS3311P (33V), which differ in working voltage, clamping, and internal trigger thresholds - direct substitution requires validation.
1N6125AUS 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):
- 47.1V (Max)
- Voltage - Breakdown (Min):
- 58.9V
- Voltage - Clamping (Max) @ Ipp:
- 85.3V
- Current - Peak Pulse (10/1000µs):
- 5.9A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
1N6125AUS FAQ
1.How can I place an order for 1N6125AUS through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6125AUS 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 1N6125AUS reliable?
The price and inventory of 1N6125AUS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6125AUS is usually 5 days.
3.What payment methods are accepted for 1N6125AUS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6125AUS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6125AUS?
1N6125AUS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6125AUS 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 1N6125AUS?
For technical support, including 1N6125AUS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6125AUS requirements.
6.How does Aetrix verify that 1N6125AUS is sourced from the original manufacturer or authorized distributors?
All 1N6125AUS 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 1N6125AUS meets industry standards.
7.What is the process for return or replacement of 1N6125AUS?
All 1N6125AUS units undergo pre-shipment inspection (PSI). If there is an issue with 1N6125AUS, 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 1N6125AUS part is unused and in its original packaging.
Return procedure for 1N6125AUS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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