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Semtech Corporation 1N6468US
- Part No.:
- 1N6468US
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SQ-MELF
- Datasheet:
-
1N6468US.pdf
- Description:
- TVS DIODE 51.6VWM 78.5VC
- Quantity:
- Payment:
- Shipping:
Inventory:8,641
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Product details
Overview
1N6468US 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 1N6468US 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 designs requiring low-voltage overshoot control.
Technical Context
The 1N6468US 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 across 24–40A (8/20μs) due to decreasing RDS(on) under surge conditions.
It operates over –40°C to +125°C with stable 27.5–28V clamping at rated current, 175pF junction capacitance at 22V/1MHz, and <600nA reverse leakage at VRWM = 22V - enabling robust protection without signal integrity compromise in high-speed power interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - matches nominal USB PD VBus and industrial 24V rail derating requirements. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - stays below 30V damage threshold of common load switches and PD controllers. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds USB IF and IEC 61000-6-2 system-level ESD requirements. |
| Dynamic Resistance | 20mΩ - ensures minimal voltage rise during high-current transients, critical for low-overshoot protection. |
| Junction Capacitance | 175pF at 22V/1MHz - compatible with DC-coupled 22V power rails; no signal distortion impact. |
| Operating Temp | –40°C to +125°C - supports extended-temperature industrial and automotive under-hood applications. |
Pinout & Package
1N6468US is housed in a RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no solder mask defined). All six terminals are required for full 40A surge rating: three parallel input pins and three parallel ground pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Parallel ground connection - mandatory for low-inductance return path and full 40A capability. |
| Pins 4, 5, 6 | IN | Parallel protected line input - must be routed as single straight trace from connector to maximize surge handling. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across 24–40A (8/20μs), eliminating design margin inflation needed with TVS diodes. |
| FET-based shunt topology | Dissipates surge energy in low-RDS(on) channel instead of PN junction - enables stable performance up to +125°C. |
| Low dynamic resistance | 20mΩ measured between 1A–40A - reduces voltage overshoot during fast-rising transients like EFT bursts. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 5kHz & 100kHz) - protects against repetitive switching noise in motor drives and PLCs. |
| Small-footprint DFN | 1.6mm × 1.6mm area - saves >60% board space vs. SO-8 or SOT-23 TVS solutions rated for equivalent surge energy. |
Applications
| USB Type-C Power Delivery | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20V–22V VBus lines in USB-C receptacles against lightning-induced surges and hot-plug ESD events. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed directly at connector, clamping transients before reaching PD controller ICs. Use Value: Maintains 27.5–28V clamping across temperature and current range - avoids false overvoltage shutdowns in PD negotiation logic. |
Use Scenario: Safeguarding enable and input pins of high-side load switches (e.g., HS2950P) in remote meters and robotics. IC Role / Device Role / Timing Role: Front-end transient diverter that limits voltage stress on internal FET gate oxide and drain-source junction. Use Value: Prevents latch-up or permanent damage to load switch during 1kV/42Ω IEC 61000-4-5 surges - extends field reliability in ungrounded installations. |
| IoT Edge Node Power Rails | Notebook/Tablet DC Power Inputs |
Use Scenario: Securing 12–24V DC input rails in battery-powered IoT gateways exposed to ESD during field servicing. IC Role / Device Role / Timing Role: Single-component solution replacing multi-stage TVS+MOV networks for compact, cost-optimized designs. Use Value: Delivers ±30kV ESD and 40A surge protection in 2.56mm² footprint - eliminates BOM count and layout complexity. |
Use Scenario: Protecting adapter-input circuits in ultrabooks where space constraints prohibit large TVS arrays. IC Role / Device Role / Timing Role: Low-capacitance (175pF), low-leakage (≤600nA) protector compatible with 22V-rated OVP comparators. Use Value: Enables direct integration into DC-in filter stage without degrading inrush or standby current specs. |
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 pin-to-pin and functionally equivalent replacement. | No change in PCB layout, thermal management, or protection performance; fully interchangeable in production. | Select TDS2211P when sourcing from Semtech's standard distribution channels or requiring documented compliance with Rev 2.5 datasheet. |
| SMAJ22A | Standard unidirectional TVS diode; 22V VRWM, 35.5V VC @ 12.3A - higher clamping, lower IPP (12.3A), larger SMA package. | Requires higher design margin due to 35.5V clamping; unsuitable for 30V-tolerant ICs; needs larger board area. | Choose SMAJ22A only if legacy design uses SMA footprint and surge requirements are limited to ≤12A. |
Compared with 1N6468US, TDS2211P offers identical protection performance with guaranteed supply continuity, while SMAJ22A trades clamping performance and size for broader distributor availability - making 1N6468US optimal for new designs prioritizing low-overshoot, high-reliability 22V rail protection.
Availability
1N6468US is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT edge node power rails requiring stable component supply across long-life production cycles.
Supply support for 1N6468US 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 protection, sensing, and signal integrity.
The 1N6468US 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 1N6468US?
The 1N6468US uses a 6-pin DFN package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad. Pins 1–3 are GND; pins 4–6 are IN. All six pins must be soldered to achieve full 40A surge rating and low-inductance grounding per Semtech's layout guidelines.
Does the 1N6468US meet IEC 61000-4-5 surge immunity standards?
Yes, the 1N6468US is rated for 40A peak pulse current (8/20μs waveform) and ±1kV combination wave (1.2/50μs voltage, 8/20μs current, RS = 42Ω), satisfying IEC 61000-4-5 Level 4 requirements for industrial environments. Its 27.5–28V clamping ensures downstream ICs remain within safe operating voltage limits.
How does the clamping voltage of the 1N6468US behave across temperature and current?
The 1N6468US maintains 27.5–28V clamping from –40°C to +125°C and across 24–40A (8/20μs), unlike TVS diodes whose clamping rises linearly with current and temperature. This stability is achieved via FET-based shunt activation and sub-0.1Ω RDS(on) conduction.
Can the 1N6468US replace standard TVS diodes like SMAJ22A in existing designs?
The 1N6468US is not a drop-in replacement for SMAJ22A due to different package (DFN-6 vs. SMA), pinout, and clamping behavior. While both have 22V working voltage, 1N6468US offers 28V clamping at 40A versus SMAJ22A's 35.5V at 12.3A - requiring PCB redesign but delivering superior protection.
Is the 1N6468US suitable for protecting USB Type-C VBus lines with Power Delivery?
Yes, the 1N6468US is explicitly validated for USB Type-C VBus protection in Semtech's application documentation. Its 22V working voltage aligns with USB PD's 20V nominal/22V max specification, and its ±30kV ESD rating and stable 28V clamping prevent damage to PD controllers during hot-plug and lightning events.
1N6468US 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 51.6V
- Voltage - Breakdown (Min):
- 54V
- Voltage - Clamping (Max) @ Ipp:
- 78.5V
- Current - Peak Pulse (10/1000µs):
- 6A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
1N6468US FAQ
1.How can I place an order for 1N6468US through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6468US 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 1N6468US reliable?
The price and inventory of 1N6468US are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6468US is usually 5 days.
3.What payment methods are accepted for 1N6468US?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6468US transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6468US?
1N6468US orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6468US 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 1N6468US?
For technical support, including 1N6468US datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6468US requirements.
6.How does Aetrix verify that 1N6468US is sourced from the original manufacturer or authorized distributors?
All 1N6468US 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 1N6468US meets industry standards.
7.What is the process for return or replacement of 1N6468US?
All 1N6468US units undergo pre-shipment inspection (PSI). If there is an issue with 1N6468US, 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 1N6468US part is unused and in its original packaging.
Return procedure for 1N6468US:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6468US Tags
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