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Semtech Corporation 1N6154
- Part No.:
- 1N6154
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- Axial
- Datasheet:
-
1N6154.pdf
- Description:
- TVS DIODE 25.1VWM 47.9VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:6,329
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Product details
Overview
1N6154 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 Type-C power delivery buses, load switch inputs, and industrial interfaces where stable clamping under temperature and current stress is critical.
For engineers reviewing the 1N6154 datasheet, pinout, applications, or equivalent options, this device offers constant-voltage clamping across its full 40A surge range and −40°C to +125°C operating temperature - a key differentiator versus conventional TVS diodes - making it especially relevant for USB PD, IoT, and industrial equipment designers evaluating robust, low-RDSON overvoltage protection.
Technical Context
The 1N6154 uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that turns on the shunt FET when transient voltage exceeds breakdown. Its clamping behavior is governed by the FET's ultra-low RDS(ON) (<0.1Ω), not junction-based voltage drop, resulting in near-constant VC across 1–40A and −40°C to +125°C.
Unlike standard TVS diodes whose VC rises linearly with IPP and temperature (VC = VBR + IPP × RDYN), the 1N6154 maintains ≤28V clamping at both 24A and 40A (1.2/50μs + 8/20μs combo wave, RS = 2Ω), with <±0.5V variation over temperature - enabling predictable protection margin design for 22V systems.
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 degradation. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave) - ensures downstream 22V-rated ICs (e.g., USB PD controllers) remain below damage threshold during surge events. |
| 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 industrial and consumer ESD immunity requirements without derating. |
| Dynamic Resistance | 20mΩ - enables minimal VC rise under high-current transients, directly enabling flat clamping performance. |
| Junction Capacitance | 175pF at 22V, 1MHz - suitable for DC/power-line protection; not intended for high-speed data lines (requires separate low-C TVS). |
| Operating Temperature | −40°C to +125°C - full-rated electrical performance maintained across automotive and industrial ambient ranges. |
Pinout & Package
1N6154 is housed in a Pb-free, RoHS-compliant DFN package measuring 1.6mm × 1.6mm × 0.55mm with six terminals. The package includes three GND pins (1–3) and three IN pins (4–6), all requiring connection to maximize surge current handling and minimize parasitic inductance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; all three must be connected to low-inductance ground plane via multiple vias. |
| 4, 5, 6 | IN | Protected line input (e.g., VBus, load switch input); all three pins are internally paralleled and must be shorted externally for rated 40A capability. |
Key Features
| Feature | Design Value |
|---|---|
| Constant clamping voltage | VC remains ≤28V from 1A to 40A and −40°C to +125°C - eliminates need for worst-case margin stacking in protection design. |
| FET-based shunt architecture | Replaces junction-limited TVS with low-RDS(ON) MOSFET - shifts energy dissipation from thermally sensitive PN junction to robust channel, improving reliability. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 5kHz & 100kHz) - withstands repetitive burst noise common in motor drives and industrial controls. |
| Small-footprint DFN | 1.6mm × 1.6mm area - saves >50% board space vs. comparable SO-8 or SOT-23 TVS solutions while maintaining 1120W peak power rating. |
| Lead-free & halogen-free | UL 94V-0 molding compound and lead-free terminal finish - meets global environmental compliance mandates without performance trade-offs. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting 20–22V VBus lines in USB-C ports supporting up to 100W PD, exposed to ESD, lightning-induced surges, and hot-plug transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed between connector and PD controller or load switch, absorbing surge energy before it reaches sensitive silicon. Use Value: Maintains ≤28V clamping at 40A and 125°C - prevents damage to 22V-rated PD controllers where conventional TVS would exceed 35V at same conditions. |
Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and factory automation equipment. IC Role / Device Role / Timing Role: Front-end transient suppressor that limits voltage seen by the load switch's internal FET gate oxide and drain-source junction. Use Value: Clamps to 28V at 40A, staying well below typical 30–35V FET breakdown thresholds - avoids catastrophic failure during 1kV/42Ω surge events. |
| IoT Edge Node Power Rail Protection | Storage Device 22V Backup Supply Protection |
|
Use Scenario: Securing 22V auxiliary rails in battery-backed IoT gateways and edge sensors subjected to field ESD and induced surges in unshielded enclosures. IC Role / Device Role / Timing Role: Standalone EOS protector on main DC input, placed immediately after connector to minimize trace inductance and coupling. Use Value: Delivers ±30kV ESD immunity and 40A surge handling in 1.6mm² footprint - enables compact, ruggedized designs without external thermal management. |
Use Scenario: Protecting 22V backup power supplies in enterprise SSDs and NAS units against power-rail transients during hot-swap or grid instability. IC Role / Device Role / Timing Role: Overvoltage guard on storage controller power input, ensuring stable operation during transient overvoltage on backup rail. Use Value: Stable 27.5–28V clamping across temperature ensures consistent protection margin for 22V-rated PMICs and flash memory power domains. |
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 specifications, and pinout - direct manufacturer-recommended replacement part number for 1N6154. | No functional difference; used interchangeably in Semtech documentation and reference designs. | Select TDS2211P when sourcing from authorized distributors with full traceability and latest revision (Rev 2.5, 2021). |
| SMAJ22A | Standard unidirectional TVS diode; 22V VRWM, 35.5V VC @ 12.3A (8/20μs), higher RDYN, VC increases with temperature and current. | Limited to lower-energy surges; requires larger margin for same 22V system due to rising clamping voltage. | Choose SMAJ22A only for cost-sensitive, non-critical 22V lines where flat clamping and 40A rating are not required. |
Compared with TDS2211P (identical function and form) and SMAJ22A (conventional TVS), the 1N6154 delivers superior protection predictability: its 28V clamping stays fixed across 40A and temperature, whereas SMAJ22A's clamping exceeds 40V at high current/temperature - making 1N6154 essential for robust 22V system design.
Availability
1N6154 is available at Aetrix Electronics and suitable for USB Type-C power delivery, industrial load switch protection, and IoT edge node power rail applications requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for 1N6154 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 1N6154 belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-reliability 22V power and interface protection applications where flat clamping and temperature stability are mandatory.
FAQ
What is the primary protection function of the 1N6154?
The 1N6154 functions as a transient diverting suppressor that protects 22V-rated power or I/O lines from electrical overstress events including ESD (±30kV), EFT (±4kV), and lightning surges (40A, 8/20μs). It uses a triggered FET architecture to clamp voltage to ≤28V regardless of surge magnitude or temperature - unlike standard TVS diodes whose clamping rises with current and heat. This makes the 1N6154 ideal for protecting sensitive 22V components like USB PD controllers and load switches.
How does the 1N6154 differ from a standard TVS diode like SMAJ22A?
The 1N6154 differs fundamentally from SMAJ22A by using a surge-rated FET and precision trigger circuit instead of a PN junction. This yields constant 27.5–28V clamping from 1A to 40A and −40°C to +125°C, whereas SMAJ22A's clamping rises from ~35V at low current to >40V at high current/temperature. The 1N6154 also achieves 20mΩ dynamic resistance versus SMAJ22A's much higher RDYN, enabling tighter voltage margins in 22V systems. Its DFN package is also significantly smaller than SMAJ22A's DO-214AC.
What is the correct PCB layout practice for the 1N6154?
For optimal 1N6154 performance, place it as close as possible to the protected connector or entry point. Connect all three IN pins (4–6) together with a short, wide trace to the protected line, and tie all three GND pins (1–3) directly to a solid ground plane using ≥3 vias per GND pin. Avoid stubs or narrow traces - parasitic inductance degrades surge response. Do not use thermal pads; energy is dissipated in the FET channel, not the junction. Follow Semtech's land pattern (1.6×1.6mm DFN) and avoid solder mask dams between pins.
Can the 1N6154 be used on high-speed data lines such as USB SuperSpeed or PCIe?
No, the 1N6154 is not suitable for high-speed data lines. Its 175pF junction capacitance at 22V is too high for signal integrity on differential pairs operating above ~10Mbps. It is designed exclusively for DC power rails and low-frequency I/O lines (e.g., USB-C VBus, CC, SBU, or load switch enable inputs). For SuperSpeed lanes, Semtech recommends low-capacitance TVS devices like RClamp3371ZC (<0.25pF), which must be used alongside the 1N6154 in complete USB-C protection schemes.
Is the 1N6154 RoHS and REACH compliant?
Yes, the 1N6154 is fully RoHS-compliant (lead-free, halogen-free) and meets WEEE requirements. Its molding compound carries UL 94V-0 flammability rating, and terminal finish is lead-free. Semtech confirms compliance in the official datasheet (Rev 2.5, 2021), and Aetrix Electronics sources only traceable, certified lots meeting these specifications. No exemptions or exceptions apply - it is compliant out-of-the-box for global industrial and consumer deployments.
1N6154 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- Axial
- 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):
- 29.7V
- Voltage - Clamping (Max) @ Ipp:
- 47.9V
- Current - Peak Pulse (10/1000µs):
- 31.3A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
1N6154 FAQ
1.How can I place an order for 1N6154 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6154 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 1N6154 reliable?
The price and inventory of 1N6154 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6154 is usually 5 days.
3.What payment methods are accepted for 1N6154?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6154 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6154?
1N6154 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6154 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 1N6154?
For technical support, including 1N6154 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6154 requirements.
6.How does Aetrix verify that 1N6154 is sourced from the original manufacturer or authorized distributors?
All 1N6154 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 1N6154 meets industry standards.
7.What is the process for return or replacement of 1N6154?
All 1N6154 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6154, 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 1N6154 part is unused and in its original packaging.
Return procedure for 1N6154:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6154 Tags
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