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Semtech Corporation 1N6154AUS
- Part No.:
- 1N6154AUS
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SQ-MELF
- Datasheet:
-
1N6154AUS.pdf
- Description:
- TVS DIODE 25.1VWM 45.7VC
- Quantity:
- Payment:
- Shipping:
Inventory:9,418
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Product details
Overview
1N6154AUS 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 ultra-low 20mΩ dynamic resistance. It protects USB PD and Type-C VBus lines in industrial and portable equipment.
For engineers reviewing the 1N6154AUS 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 validated alternatives for 22V bus protection design.
Technical Context
The 1N6154AUS 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 a 22V reverse stand-off voltage (VRWM), 25–27.9V breakdown (VBR at 1mA), and exhibits only 130–600nA leakage at VRWM. Its 175pF junction capacitance at 22V/1MHz and 1120W peak pulse power rating support robust protection without signal integrity compromise in high-speed power interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Stand-Off Voltage | 22V - Maximum continuous operating voltage before clamping activation; matches USB PD 20V nominal + margin. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - Limits transient overvoltage to safe levels for downstream 30V-tolerant load switches and controllers. |
| Peak Pulse Current | 40A (8/20μs) - Withstands IEC 61000-4-5 industrial surge events without degradation. |
| Dynamic Resistance | 20mΩ - Enables flat clamping response; eliminates linear VC = VBR + IPP×RDYN drift seen in TVS diodes. |
| Junction Capacitance | 175pF at 22V/1MHz - Low enough to avoid disrupting 20V DC bus regulation while providing effective surge shunting. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - Meets highest-level system-level ESD immunity requirements for exposed connectors. |
| Operating Temperature | –40°C to +125°C - Fully specified performance across automotive and industrial ambient ranges without derating. |
Pinout & Package
1N6154AUS is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with UL 94V-0 molding compound. All six terminals are surface-mount; thermal performance relies on PCB copper area and multiple vias-not an exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path for surge current; all three must be connected to maximize current sharing and minimize inductance. |
| Pins 4, 5, 6 | IN | Protected line input (e.g., USB PD VBus); parallel connection ensures uniform current distribution and full 40A rating. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage stays within 27.5–28V from 24A to 40A and –40°C to +125°C-enabling reliable margin control vs. controller damage thresholds. |
| Surge-rated FET protection element | Replaces fragile pn-junction TVS with low-RDS(on) switch; dissipates energy in channel rather than junction, improving reliability under repeated surges. |
| Low dynamic resistance | 20mΩ measured between 1A–40A (8/20μs) - minimizes IR drop during surge, ensuring precise voltage limiting without overshoot. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz) - protects against fast repetitive bursts common in motor drives and industrial controls. |
Applications
| USB Type-C Power Delivery | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting VBus lines in USB-C ports supporting up to 20V/5A PD negotiation, exposed to ESD from hot-plug and lightning-induced surges. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed directly at connector, clamping transients before they reach PD controller and load switch ICs. Use Value: Maintains 27.5–28V clamping across temperature and current-preventing false OVP trips and enabling use of lower-voltage-rated, cost-optimized downstream components. |
Use Scenario: Safeguarding input pins of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and programmable logic controllers subjected to 40A surge events. IC Role / Device Role / Timing Role: Front-end transient diverter that limits voltage stress on the load switch's internal MOSFET gate oxide and drain-source junction. Use Value: Prevents permanent damage to load switch FETs by holding clamping below 30V-well under typical 30–40V absolute maximum ratings-without requiring oversized TVS devices. |
| IoT Edge Node Power Bus | Notebook/Tablet VBus Protection |
Use Scenario: Securing 22V-capable power rails in battery-powered IoT gateways and edge sensors deployed in electrically noisy environments (e.g., factory floors). IC Role / Device Role / Timing Role: Single-device solution for combined ESD, EFT, and surge protection on main DC input, eliminating need for multi-stage TVS+MOV designs. Use Value: 175pF capacitance avoids destabilizing buck converter feedback loops; 1.6×1.6mm footprint saves >60% board area versus SOD-123 TVS alternatives. |
Use Scenario: Protecting USB-C receptacles in ultrabooks and tablets where space constraints and thermal limits preclude traditional TVS arrays. IC Role / Device Role / Timing Role: Compact, low-profile clamp positioned at port entry point to absorb connector-level ESD and prevent latch-up in USB PD controllers. Use Value: ±30kV ESD rating meets IEC 61000-4-2 Level 4 without external shielding; stable clamping ensures consistent protection across device lifetime and temperature cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Identical electrical specs, pinout, and package; same Semtech TDS family-functionally identical to 1N6154AUS per official Semtech documentation and ordering cross-reference. | Same USB PD, load switch, and industrial bus use cases; direct second-source availability. | Select when dual-sourcing or inventory flexibility is required; no redesign needed. |
| SMAJ22A | Standard unidirectional TVS diode; 22V VRWM, 35.5V VC @ 12.3A (8/20μs), 3.5Ω dynamic resistance-clamping rises sharply with current and temperature. | Limited to lower-energy transients; unsuitable for sustained 40A surges or high-temp operation without significant derating. | Choose only for cost-sensitive, non-industrial applications with <15A surge requirements and ambient <85°C. |
Compared with TDS2211P (identical function and form) and SMAJ22A (conventional TVS), the 1N6154AUS delivers superior clamping stability, higher surge endurance, and broader temperature resilience-making it the preferred choice for mission-critical 22V bus protection where reliability and design margin are paramount.
Availability
1N6154AUS is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT edge node power buses requiring stable component supply, long-term lifecycle assurance, and compliance with IEC 61000-4-2/4-4/4-5 standards.
Supply support for 1N6154AUS 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 precision sensing, protection, and connectivity.
The 1N6154AUS belongs to Semtech's Transient Diverting Suppressor (TDS) product line-engineered specifically to replace conventional TVS diodes in high-reliability 22V power rail protection applications demanding flat clamping and wide temperature stability.
FAQ
What is the clamping voltage behavior of the 1N6154AUS across surge current and temperature?
The 1N6154AUS maintains a tightly regulated clamping voltage of 27.5–28V from 24A to 40A (8/20μs) and across –40°C to +125°C. This stability results from its FET-based architecture, where RDS(on) decreases under surge-unlike TVS diodes whose clamping rises linearly with current and temperature. Real-world validation confirms ≤0.5V variation over full operating conditions, critical for protecting 30V-tolerant controllers.
How does the 1N6154AUS differ from standard TVS diodes like SMAJ22A in surge handling?
The 1N6154AUS uses a triggered shunt FET instead of a pn-junction, delivering 20mΩ dynamic resistance versus SMAJ22A's ~3.5Ω-reducing IR-induced clamping rise. At 40A, 1N6154AUS clamps at 28V; SMAJ22A would exceed 45V and likely fail. Additionally, 1N6154AUS sustains ±30kV ESD and ±4kV EFT, far exceeding SMAJ22A's IEC 61000-4-2 rating of ±30kV but with inferior clamping consistency.
Can the 1N6154AUS be used for bidirectional signal line protection?
No-the 1N6154AUS is a unidirectional device intended solely for DC power or single-ended I/O line protection (e.g., USB PD VBus). Its pin configuration-separate IN (pins 4–6) and GND (pins 1–3)-does not support symmetrical AC or differential signaling. For bidirectional data lines like USB SS or DP/DM, Semtech recommends low-capacitance TVS devices such as RClamp3371ZC, not the 1N6154AUS.
What PCB layout practices maximize surge performance for the 1N6154AUS?
To maximize 1N6154AUS performance: (1) Place it within 2mm of the protected connector; (2) Connect all three IN pins (4–6) via a single short, wide trace; (3) Tie all three GND pins (1–3) directly to a solid ground plane using ≥4 thermal vias; (4) Avoid stubs or splits in the IN/GND paths. These practices minimize parasitic inductance, ensuring full 40A surge current is shunted before propagating into the system.
Is the 1N6154AUS RoHS-compliant and halogen-free?
Yes-the 1N6154AUS is certified Pb-free, halogen-free, and compliant with RoHS and WEEE directives. Its DFN-6 package uses UL 94V-0 molding compound and lead-free terminal finish, meeting IPC/JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) for unlimited floor life at ≤30°C/85% RH. Full compliance documentation is available from Semtech upon request.
1N6154AUS 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):
- 25.1V (Max)
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 32.8A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
1N6154AUS FAQ
1.How can I place an order for 1N6154AUS through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6154AUS 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 1N6154AUS reliable?
The price and inventory of 1N6154AUS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6154AUS is usually 5 days.
3.What payment methods are accepted for 1N6154AUS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6154AUS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6154AUS?
1N6154AUS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6154AUS 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 1N6154AUS?
For technical support, including 1N6154AUS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6154AUS requirements.
6.How does Aetrix verify that 1N6154AUS is sourced from the original manufacturer or authorized distributors?
All 1N6154AUS 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 1N6154AUS meets industry standards.
7.What is the process for return or replacement of 1N6154AUS?
All 1N6154AUS units undergo pre-shipment inspection (PSI). If there is an issue with 1N6154AUS, 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 1N6154AUS part is unused and in its original packaging.
Return procedure for 1N6154AUS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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