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Semtech Corporation 1N6148
- Part No.:
- 1N6148
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- Axial
- Datasheet:
-
1N6148.pdf
- Description:
- TVS DIODE 13.7VWM 26.3VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:5,583
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Product details
Overview
1N6148 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, Type-C VBus, and load switch inputs in industrial and portable electronics.
For engineers reviewing the 1N6148 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low capacitance (175pF), DFN 1.6×1.6mm package footprint, and FET-based shunt architecture enabling constant-voltage clamping unlike conventional TVS diodes.
Technical Context
The 1N6148 uses a surge-rated MOSFET as its primary protection element, activated by a precision trigger circuit that senses overvoltage events and drives the FET into low-RDS(on) conduction. This architecture delivers near-constant clamping voltage (27.5–28V) from 24A to 40A peak pulse current and across −40°C to +125°C operating temperature.
Unlike standard TVS diodes whose clamping voltage rises linearly with current (VC = VBR + IPP × RDYN), the 1N6148 maintains stable clamping due to decreasing RDS(on) under surge, resulting in <0.1Ω effective on-resistance and minimal thermal derating at elevated ambient temperatures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC bus voltage the device safely blocks without leakage or degradation |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave) - ensures protected ICs (e.g., USB PD controllers) remain below damage thresholds during 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 immunity standards without external shielding |
| Dynamic Resistance | 20mΩ - enables low-voltage-drop shunting and minimizes power dissipation during multi-amp transients |
| Junction Capacitance | 175pF at 22V, 1MHz - compatible with 22V power rail protection without signal integrity impact on adjacent traces |
| Package | DFN 1.6mm × 1.6mm × 0.55mm, 6-lead - provides board space savings vs. SOT-23 or SOIC TVS while supporting high-current PCB layout |
Pinout & Package
1N6148 is housed in a Pb-free, RoHS-compliant DFN 1.6mm × 1.6mm × 0.55mm 6-lead package with exposed thermal pad not required (energy dissipated in silicon). All pins must be connected: Pins 1–3 are GND; Pins 4–6 are IN (parallel-connected input terminals).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | Ground | Low-inductance return path for surge current; all three must be vias-connected to internal ground plane for full 40A rating |
| Pins 4, 5, 6 | Input / Protected Line | Parallel-connected anode-side terminals tied directly to VBus or power line; equal current sharing enables robust 40A handling |
Key Features
| Feature | Design Value |
|---|---|
| FET-based shunt architecture | Enables flat clamping voltage (27.5–28V) across full 24–40A surge range and −40°C to +125°C, eliminating thermal derating concerns |
| Ultra-low dynamic resistance | 20mΩ ensures minimal IR drop during surge, reducing stress on downstream components and PCB trace heating |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 5kHz & 100kHz) - protects against repetitive fast transients in motor drives and industrial controls |
| Small-footprint DFN package | 1.6mm × 1.6mm saves >60% board area vs. comparable SOIC-8 TVS solutions while maintaining 6-terminal parallel routing |
| Lead-free & halogen-free | Meets RoHS/WEEE and UL 94V-0 flammability standards - suitable for consumer, medical, and industrial end-equipment compliance |
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 and lightning-induced surges. IC Role / Device Role / Timing Role: Primary shunt protector placed between connector and PD controller or e-fuse, clamping transients before they reach sensitive silicon. Use Value: Maintains 27.5–28V clamping across temperature-prevents false triggering or damage to PD controllers rated for ≤30V absolute max. |
Use Scenario: Safeguarding input terminals of high-side load switches (e.g., HS2950P) in remote meters, robotics, and IoT gateways. IC Role / Device Role / Timing Role: Front-end transient suppressor absorbing 40A surges before they stress the load switch's internal FET drain-source junction. Use Value: Prevents latch-up or breakdown of load switch MOSFETs by limiting transient voltage to 28V, well below typical 30–40V VDSS ratings. |
| 22V Industrial Power Rail Protection | Notebook/Tablet DC Input Protection |
Use Scenario: Securing 22V auxiliary rails in programmable logic controllers (PLCs), HMI panels, and factory automation equipment. IC Role / Device Role / Timing Role: Standalone EOS suppressor on main DC input, replacing bulkier MOV+TVS cascades with single-component reliability. Use Value: Delivers 1120W peak pulse power handling in 1.6mm² footprint-enabling compact, fanless designs meeting IEC 61000-4-5 Level 4. |
Use Scenario: Protecting 20V DC-in ports on ultrabooks and tablets against accidental adapter misconnection and ESD during hot-plug. IC Role / Device Role / Timing Role: Low-capacitance (175pF), low-leakage (≤600nA) protector placed immediately after barrel jack or USB-C receptacle. Use Value: Ensures no standby current penalty or voltage droop while providing ±30kV ESD robustness-critical for battery-powered longevity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A | Standard unidirectional TVS diode; 35.1V clamping at 12.5A (8/20μs); higher RDYN causes clamping rise with current/temp | Limited to lower-energy surges; requires derating above 85°C; unsuitable for 40A industrial surges | Select only if cost-sensitive and peak current ≤12.5A; verify clamping stays below protected IC's VABS_MAX at worst-case temp |
| TDS2211P | Same manufacturer, identical architecture and specs; 1N6148 is Semtech's alternate ordering code for TDS2211P | No functional difference; same pinout, marking, and performance-dual-sourced under different part numbering | Direct form-fit-function replacement; identical supply chain and qualification; use interchangeably in BOMs |
Compared with SMAJ22A, the 1N6148 delivers 3.2× higher peak current rating and stable 28V clamping versus rising 35–42V clamping, making it superior for industrial 40A surge compliance; versus TDS2211P, it is the exact same device-no design or layout changes needed.
Availability
1N6148 is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and 22V power rail protection requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N6148 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, power management, and transient protection.
The 1N6148 belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-reliability 20–24V power and interface protection applications where clamping stability and surge robustness are critical.
FAQ
What is the primary protection function of the 1N6148?
The 1N6148 functions as a transient diverting suppressor that shunts high-energy electrical overstress (EOS) events-including ESD, lightning surges, and EFT-to ground using a precision-triggered MOSFET. Unlike TVS diodes, it maintains a nearly constant 27.5–28V clamping voltage across its full 40A surge rating and operating temperature range, ensuring reliable protection for 22V systems such as USB PD and industrial power rails. The 1N6148 achieves this via low-RDS(on) FET conduction rather than avalanche breakdown.
How does the 1N6148 differ from standard TVS diodes like SMAJ22A?
The 1N6148 differs fundamentally from standard TVS diodes: it uses a triggered MOSFET shunt instead of a pn-junction avalanche structure. This yields constant clamping voltage (27.5–28V) across 24–40A and −40°C to +125°C, whereas SMAJ22A's clamping rises from ~35V to >42V under same conditions due to fixed dynamic resistance. The 1N6148 also handles 40A vs. SMAJ22A's 12.5A, supports higher energy (1120W vs. ~350W), and offers lower leakage (<600nA vs. ~1µA). The 1N6148 is not a drop-in replacement but a higher-performance architectural upgrade.
What is the correct PCB layout for optimal 1N6148 performance?
For optimal 1N6148 performance, connect all three GND pins (1–3) and all three IN pins (4–6) in parallel using short, wide copper traces. Place the device within 5mm of the protected connector. Route GND pins to a solid internal ground plane using ≥3 vias per pin to minimize inductance. Avoid thermal pads-the 1N6148 dissipates energy internally and requires no external heatsinking. Do not isolate any of the six pins; incomplete connection reduces peak current rating and clamping consistency. Follow Semtech's land pattern (1.6×1.6mm DFN) precisely to ensure solder joint reliability under surge stress.
Is the 1N6148 suitable for protecting USB Type-C CC and SBU lines?
No, the 1N6148 is not suitable for USB Type-C CC or SBU line protection. Its 175pF junction capacitance and 22V working voltage are optimized for VBus or power rail protection-not low-speed data lines requiring sub-0.5pF capacitance. For CC/SBU, Semtech recommends uClamp2411ZA (24V, 0.5pF), which avoids signal distortion and timing skew. The 1N6148 is intended exclusively for high-voltage, high-current paths like VBus, load switch inputs, or 22V auxiliary rails where its 40A surge capability and stable clamping deliver decisive advantage.
Does the 1N6148 require external bias or control signals to operate?
No, the 1N6148 operates autonomously with no external bias, enable signals, or control pins. It is a passive, two-terminal device: IN (pins 4–6) connects to the protected line, and GND (pins 1–3) connects to system ground. Internal precision trigger circuitry detects overvoltage events exceeding the 25–27.9V breakdown threshold and instantly activates the shunt FET. No configuration, firmware, or external components are needed-making the 1N6148 ideal for space-constrained, high-reliability applications where simplicity and zero-latency response are essential.
1N6148 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):
- 13.7V (Max)
- Voltage - Breakdown (Min):
- 16.2V
- Voltage - Clamping (Max) @ Ipp:
- 26.3V
- Current - Peak Pulse (10/1000µs):
- 57A
- 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
1N6148 FAQ
1.How can I place an order for 1N6148 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6148 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 1N6148 reliable?
The price and inventory of 1N6148 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6148 is usually 5 days.
3.What payment methods are accepted for 1N6148?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6148 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6148?
1N6148 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6148 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 1N6148?
For technical support, including 1N6148 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6148 requirements.
6.How does Aetrix verify that 1N6148 is sourced from the original manufacturer or authorized distributors?
All 1N6148 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 1N6148 meets industry standards.
7.What is the process for return or replacement of 1N6148?
All 1N6148 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6148, 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 1N6148 part is unused and in its original packaging.
Return procedure for 1N6148:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6148 Tags
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Diodes Incorporated
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