My Inquiry
My Account
Semtech Corporation 1N6122AUS
- Part No.:
- 1N6122AUS
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SQ-MELF
- Datasheet:
-
1N6122AUS.pdf
- Description:
- TVS DIODE 35.8VWM 64.6VC
- Quantity:
- Payment:
- Shipping:
Inventory:4,217
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N6122AUS 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, Type-C VBus, and load switch inputs in industrial and portable electronics.
For engineers reviewing the 1N6122AUS datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, DFN-6 pin mapping, real-world clamping stability across temperature and current, and validated alternatives for 22V bus protection design.
Technical Context
The 1N6122AUS 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 and across –40°C to +125°C due to decreasing RDS(on) under surge.
It operates with 22V reverse stand-off voltage (VRWM), 25–27.9V breakdown (VBR at 1mA), and ultra-low 175pF junction capacitance at 22V/1MHz-enabling use on high-speed power rails without signal integrity degradation. Its DFN-6 package integrates three parallel input terminals (Pins 4–6) and three ground terminals (Pins 1–3) for low-inductance, high-current surge conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V reverse stand-off (VRWM) - defines maximum continuous DC operating voltage before leakage rises significantly. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave, RS=2Ω) - ensures protected ICs (e.g., USB PD controllers) stay below damage threshold during worst-case surges. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements for 22V systems. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD robustness standards without derating. |
| Dynamic Resistance | 20mΩ (measured 1–40A, 8/20μs) - enables flat clamping response and minimizes voltage overshoot during fast transients. |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough to avoid loading 20V power rails in USB PD and industrial load-switch applications. |
Pinout & Package
1N6122AUS is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no solder paste required). All six pins are electrically active and must be connected per layout guidelines for full 40A surge rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 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. |
| Pins 4, 5, 6 | IN | Parallel-connected input terminals for protected line (e.g., VBus) - connection to connector must be short and direct to minimize parasitic inductance. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V from 24A to 40A and remains stable across –40°C to +125°C - eliminates thermal derating and simplifies margin analysis. |
| FET-based shunt protection | Surge energy diverted through low-RDS(on) MOSFET instead of PN-junction - avoids thermal runaway and enables higher single-pulse energy handling than TVS diodes. |
| Low dynamic resistance | 20mΩ measured over full 1–40A range - reduces voltage overshoot during sub-100ns ESD events and improves system-level immunity. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz & 5kHz bursts) - protects against repetitive switching noise in motor drives and industrial PLCs. |
Applications
| USB Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting 20V–22V VBus lines 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 protector placed directly at the connector, clamping transients before they reach the PD controller and load switch. Use Value: Maintains 27.5–28V clamping across temperature and current - prevents false overvoltage shutdown and ensures reliable PD negotiation under stress. |
Use Scenario: Safeguarding input pins of high-side load switches (e.g., HS2950P) in remote meters, robotics, and IoT gateways subjected to field 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: Clamps below 28V at 40A - keeps stress within safe operating area (SOA) of industrial-grade load switches rated for ≤30V operation. |
| Industrial Equipment Power Rails | Notebook/Tablet DC Input Protection |
|
Use Scenario: Securing 22V auxiliary power rails in programmable logic controllers (PLCs), human-machine interfaces (HMIs), and factory automation sensors. IC Role / Device Role / Timing Role: Single-device solution for combined IEC 61000-4-2, -4-4, and -4-5 compliance on unregulated 22V supply lines. Use Value: Eliminates need for multi-stage TVS+MOV designs - reduces BOM count and PCB area while improving surge repeatability and lifetime reliability. |
Use Scenario: Protecting 20V DC input ports in thin-and-light notebooks and tablets where space and thermal constraints limit traditional TVS options. IC Role / Device Role / Timing Role: Compact, low-capacitance surge suppressor mounted adjacent to barrel jack or USB-C port to intercept fast-rising transients. Use Value: 1.6mm × 1.6mm footprint saves >60% board area vs. SOD-123 TVS - critical for slim form factors without sacrificing 40A surge 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 | Same manufacturer, identical electrical specs and DFN-6 package - confirmed pin-to-pin and functional replacement per Semtech documentation. | No change in layout, routing, or thermal design - direct drop-in for 1N6122AUS in existing designs. | Select TDS2211P when sourcing from Semtech's official distribution channel; identical performance and qualification status. |
| uClamp2411ZA | 24V working voltage, lower 24A IPP rating, 30V clamping at 24A, and 12pF capacitance - optimized for CC/SBU lines, not VBus. | Not suitable for 22V power rail protection - clamping voltage exceeds safe margin for PD controllers and load switches. | Use uClamp2411ZA only for low-voltage, low-capacitance data-line protection; not a functional substitute for 1N6122AUS in power-rail roles. |
Compared with TDS2211P, 1N6122AUS offers identical protection performance and mechanical compatibility, making it a seamless source option; uClamp2411ZA serves different signal-integrity-critical roles and cannot replace 1N6122AUS in 22V bus applications due to lower surge rating and higher clamping.
Availability
1N6122AUS is available at Aetrix Electronics and suitable for USB Power Delivery, industrial load switch inputs, and 22V power rail protection requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 1N6122AUS 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.
The 1N6122AUS belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 20–24V power-rail protection with superior clamping stability and surge endurance.
FAQ
What is the maximum continuous operating voltage for the 1N6122AUS?
The 1N6122AUS has a reverse stand-off voltage (VRWM) of 22V, meaning it can safely block up to 22V DC or RMS AC continuously without significant leakage. This makes it suitable for nominal 20V USB PD VBus and industrial 22V auxiliary rails. Operation above 22V risks premature conduction and accelerated wear.
Does the 1N6122AUS require a thermal pad or heatsink on the PCB?
No, the 1N6122AUS does not require a thermal pad or external heatsink. Its FET-based architecture dissipates surge energy primarily through conduction rather than junction heating, and the DFN-6 package is qualified for 40A single-pulse surges without thermal derating. Layout focuses on low-inductance grounding-not thermal mass.
How does the 1N6122AUS clamping voltage compare to standard TVS diodes at elevated temperatures?
Unlike standard TVS diodes whose clamping voltage increases with temperature, the 1N6122AUS maintains 27.5–28V clamping from –40°C to +125°C due to its FET-based constant-clamp design. At 125°C, a typical 22V TVS may clamp above 35V, risking damage to downstream ICs-whereas 1N6122AUS stays within safe margins.
Can the 1N6122AUS be used to protect high-speed data lines like USB SuperSpeed or DisplayPort?
No, the 1N6122AUS is not intended for high-speed data line protection. Its 175pF junction capacitance would severely degrade signal integrity on differential pairs. It is specifically designed for power-rail and low-frequency I/O protection. For USB SS or DP lines, Semtech recommends low-capacitance devices like RClamp3371ZC (0.25pF).
What is the recommended PCB layout practice for optimal 1N6122AUS performance?
Place the 1N6122AUS as close as possible to the protected connector. Connect all three IN pins (4–6) via a single short, wide trace to the line, and tie all three GND pins (1–3) directly to a solid ground plane using ≥3 vias each. Avoid stubs or splits in the ground path to minimize inductance and preserve 40A surge capability.
1N6122AUS 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):
- 35.8V (Max)
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.6V
- Current - Peak Pulse (10/1000µs):
- 7.7A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
1N6122AUS FAQ
1.How can I place an order for 1N6122AUS through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6122AUS 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 1N6122AUS reliable?
The price and inventory of 1N6122AUS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6122AUS is usually 5 days.
3.What payment methods are accepted for 1N6122AUS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6122AUS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6122AUS?
1N6122AUS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6122AUS 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 1N6122AUS?
For technical support, including 1N6122AUS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6122AUS requirements.
6.How does Aetrix verify that 1N6122AUS is sourced from the original manufacturer or authorized distributors?
All 1N6122AUS 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 1N6122AUS meets industry standards.
7.What is the process for return or replacement of 1N6122AUS?
All 1N6122AUS units undergo pre-shipment inspection (PSI). If there is an issue with 1N6122AUS, 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 1N6122AUS part is unused and in its original packaging.
Return procedure for 1N6122AUS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6122AUS Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
