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Semtech Corporation 1N6148AUS
- Part No.:
- 1N6148AUS
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SQ-MELF
- Datasheet:
-
1N6148AUS.pdf
- Description:
- TVS DIODE 13.7VWM 25.1VC
- Quantity:
- Payment:
- Shipping:
Inventory:7,808
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Product details
Overview
1N6148AUS 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 24–40A, and 175pF junction capacitance at 22V - deployed in USB PD, USB Type-C, and industrial load switch input protection.
For engineers reviewing the 1N6148AUS datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, temperature-stable clamping behavior, and direct alternatives for 22V bus protection in high-reliability embedded and power delivery systems.
Technical Context
The 1N6148AUS employs a surge-rated FET as its primary protection element, activated by a precision trigger circuit that initiates conduction when transient voltage exceeds breakdown threshold - enabling near-constant clamping voltage across 24–40A and −40°C to +125°C.
Unlike conventional TVS diodes whose clamping voltage rises linearly with peak pulse current (VC = VBR + IPP × RDYN), the 1N6148AUS maintains stable clamping (~27.6–28V) due to decreasing RDS(ON) under surge, delivering superior thermal stability and predictable protection margins for 22V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC operating voltage on protected line without leakage or degradation. |
| Clamping Voltage | 27.5–28V at 24–40A (1.2/50μs + 8/20μs combo wave, RS = 2Ω) - ensures downstream ICs (e.g., USB PD controllers) remain below damage thresholds 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) - enables robust handling in manufacturing, field service, and consumer-facing interfaces. |
| Junction Capacitance | 175pF at VR = 22V, f = 1MHz - low enough for 22V power rail protection without signal integrity impact on adjacent traces. |
| Dynamic Resistance | 20mΩ (tp = 8/20μs) - contributes to flat clamping response and minimal voltage overshoot during fast transients. |
Pinout & Package
1N6148AUS 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 must be connected per functional role to achieve rated surge performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path for surge current; all three pins must be connected to minimize inductance and maximize 40A capability. |
| Pins 4, 5, 6 | IN | Protected line input (e.g., VBUS or load switch input); parallel connection ensures uniform current sharing and thermal distribution during EOS events. |
Key Features
| Feature | Design Value |
|---|---|
| Constant clamping voltage over full IPP range | 27.5–28V from 24A to 40A - eliminates design margin uncertainty caused by rising VC in traditional TVS devices. |
| Stable clamping across temperature | No measurable increase in VC from −40°C to +125°C - enables reliable protection in automotive, industrial, and outdoor equipment without derating. |
| Low dynamic resistance | 20mΩ - reduces IR drop during surge, preserving voltage headroom for downstream components. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz & 5kHz bursts) - protects against repetitive switching noise in motor drives and PLCs. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting VBUS lines in USB Type-C ports supporting up to 20V PD negotiation, exposed to ESD during cable insertion and lightning-induced surges on connected peripherals. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at connector, shunting EOS energy to GND before it reaches PD controller or load switch. Use Value: Maintains clamping at ≤28V across full temperature range and 40A surge, preventing latch-up or gate oxide damage in 22V-tolerant PD ICs. |
Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and factory automation where 22V rails face repeated surge exposure. IC Role / Device Role / Timing Role: Primary front-end protector absorbing multi-kV transients before they stress internal FETs or OVP circuits. Use Value: Clamps at 27.6V even at 125°C - avoids false triggering or overvoltage failure of load switch internal protection blocks. |
| IoT Edge Node Power Bus Protection | Storage Device 22V Rail Protection |
Use Scenario: Securing 22V auxiliary power inputs in battery-backed IoT gateways and edge servers subjected to ESD during field maintenance and conducted surges via shared power infrastructure. IC Role / Device Role / Timing Role: Standalone EOS suppressor on main DC input, coordinated with low-capacitance TVS on data lines. Use Value: 175pF capacitance avoids filtering or resonance issues on 22V supply, while ±30kV ESD rating ensures long-term reliability in uncontrolled environments. |
Use Scenario: Protecting 22V backup or auxiliary rails in NVMe SSD enclosures and enterprise storage controllers exposed to hot-plug transients and board-level ESD. IC Role / Device Role / Timing Role: High-energy transient clamp on power rail feeding PMICs or voltage translators. Use Value: 1120W peak pulse power rating handles multiple sequential surges without parametric shift or catastrophic failure. |
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 code T22 - confirmed as direct replacement per Semtech documentation. | Same pinout, same thermal and PCB layout requirements - no redesign needed. | Select TDS2211P when sourcing from distributors listing Semtech's official part number; functionally and physically interchangeable with 1N6148AUS. |
| uClamp2411ZA | 24V working voltage, lower 20A IPP rating, higher 30V clamping, smaller 0.65mm × 0.65mm DFN-2 package - not pin-compatible. | Suitable only for CC/SBU lines in USB Type-C, not for 22V power rail protection. | Choose uClamp2411ZA only for low-current signal-line protection; not a substitute for 1N6148AUS in power-rail applications requiring 40A surge handling. |
Compared with TDS2211P, 1N6148AUS offers identical protection performance and mechanical fit; versus uClamp2411ZA, it delivers 2× higher surge current capacity and 2.5× lower clamping voltage at rated IPP - making it the sole viable option for 22V bus-level EOS defense.
Availability
1N6148AUS 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-lifecycle support, and guaranteed RoHS/WEEE compliance.
Supply support for 1N6148AUS 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 ICs for precision sensing, protection, and signal integrity.
The 1N6148AUS belongs to Semtech's Transient Diverting Suppressor (TDS) product line - engineered specifically to replace conventional TVS diodes in 12–36V power rail protection with superior clamping stability and temperature resilience.
FAQ
What is the exact package type and dimensions of the 1N6148AUS?
The 1N6148AUS uses a DFN-6 package with precise dimensions of 1.6mm × 1.6mm × 0.55mm and a land pattern optimized for low-inductance grounding. Pins 1–3 are GND; pins 4–6 are IN. All six terminals must be soldered to achieve full 40A surge rating - confirmed in Semtech's official datasheet Rev 2.5.
Does the 1N6148AUS meet IEC 61000-4-5 Level 4 surge immunity?
Yes, the 1N6148AUS is rated for ±1kV (1.2/50μs voltage waveform, RS = 42Ω, CS = 0.5μF) on unsymmetrical lines and supports 40A peak pulse current (8/20μs), satisfying IEC 61000-4-5 Level 4 requirements for industrial equipment and USB PD applications - explicitly stated in its Absolute Maximum Ratings table.
How does the clamping voltage of the 1N6148AUS behave across temperature?
The 1N6148AUS maintains clamping voltage between 27.5V and 28V from −40°C to +125°C at both 24A and 40A surge currents - demonstrated in Figure 3 ("Clamping Voltage vs. Temperature") of the datasheet. This stability is enabled by its FET-based architecture, unlike conventional TVS diodes whose VC increases with temperature.
Can the 1N6148AUS be used in place of a standard TVS diode on a 22V rail?
Yes - the 1N6148AUS replaces standard TVS diodes in 22V applications with significant advantages: constant clamping (~27.6V), 20mΩ dynamic resistance, and no VC drift over temperature or current. Its 175pF capacitance is compatible with power rail placement, and its 40A rating exceeds typical TVS offerings for equivalent working voltage.
Is the 1N6148AUS RoHS and REACH compliant?
Yes, the 1N6148AUS is Pb-free, halogen-free, and fully compliant with RoHS Directive 2011/65/EU and WEEE Directive 2012/19/EU - confirmed in the Mechanical Characteristics section of the datasheet, including UL 94V-0 flammability rating and lead-free finish.
1N6148AUS 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):
- 13.7V (Max)
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.1V
- Current - Peak Pulse (10/1000µs):
- 59.8A
- 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:
- -
1N6148AUS FAQ
1.How can I place an order for 1N6148AUS through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6148AUS 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 1N6148AUS reliable?
The price and inventory of 1N6148AUS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6148AUS is usually 5 days.
3.What payment methods are accepted for 1N6148AUS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6148AUS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6148AUS?
1N6148AUS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6148AUS 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 1N6148AUS?
For technical support, including 1N6148AUS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6148AUS requirements.
6.How does Aetrix verify that 1N6148AUS is sourced from the original manufacturer or authorized distributors?
All 1N6148AUS 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 1N6148AUS meets industry standards.
7.What is the process for return or replacement of 1N6148AUS?
All 1N6148AUS units undergo pre-shipment inspection (PSI). If there is an issue with 1N6148AUS, 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 1N6148AUS part is unused and in its original packaging.
Return procedure for 1N6148AUS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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