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Semtech Corporation 1N6472US
- Part No.:
- 1N6472US
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SQ-MELF, G
- Datasheet:
-
1N6472US.pdf
- Description:
- TVS DIODE 15VWM 26.5VC G-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:5,791
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Product details
Overview
1N6472US 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 20mΩ dynamic resistance. It protects USB PD, Type-C VBus, and load switch inputs in industrial and portable electronics.
For engineers reviewing the 1N6472US datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, DFN-6 package layout guidance, temperature-stable clamping behavior, and real-world use cases in USB Type-C and industrial power rail protection.
Technical Context
The 1N6472US employs 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 and −40°C to +125°C due to decreasing RDS(on) under surge conditions.
It operates with a 22V reverse stand-off voltage (VRWM), 25–27.9V breakdown (VBR), and 175pF junction capacitance at 22V/1MHz - optimized for low-voltage overshoot suppression without signal integrity degradation on power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V reverse stand-off - matches USB PD 20V nominal + margin, enabling direct placement on VBus lines without derating. |
| Clamping Voltage | 27.5–28V at 24–40A (1.2/50μs + 8/20μs combo wave) - stays below 30V damage threshold of common 30V-rated load switches and PD controllers. |
| Peak Pulse Current | 40A (8/20μs) - satisfies IEC 61000-4-5 Level 4 (±1kV, RS = 42Ω) for industrial equipment and USB PD host ports. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds Class 4 requirements, eliminating need for upstream ESD staging in compact IoT designs. |
| Dynamic Resistance | 20mΩ (8/20μs) - ensures minimal voltage rise under surge, critical for maintaining safe overvoltage margins during fast transients. |
| Junction Capacitance | 175pF at 22V/1MHz - low enough to avoid power rail instability while providing robust energy absorption unlike sub-10pF data-line TVS devices. |
Pinout & Package
1N6472US 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; no thermal pad required - energy dissipation occurs within the silicon FET structure.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return for surge current - all three pins must be connected to maximize current sharing and minimize parasitic inductance. |
| 4, 5, 6 | IN | Protected line input - tied together to the VBus or power rail; parallel connection ensures full 40A rating and uniform current distribution. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across 24–40A and −40°C to +125°C - eliminates thermal derating calculations required for standard TVS diodes. |
| FET-based shunt topology | Surge energy diverted through low-RDS(on) channel instead of PN-junction - enables higher IPP and lower VC than silicon avalanche diodes. |
| DFN-6 footprint | 1.6mm × 1.6mm area - saves >60% board space vs. SO-8 or SOD-123 alternatives while supporting automated reflow assembly. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz) - protects against repetitive burst noise in motor drives and PLC I/O modules. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting 20V USB PD VBus lines from lightning surges, hot-plug transients, and ESD events during cable insertion. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at Type-C connector, clamping overvoltage before it reaches PD controller or buck converter. Use Value: Maintains 27.5–28V clamping across temperature and current range - prevents false OVP trips and ensures reliable 20V operation even at 125°C ambient. |
Use Scenario: Safeguarding enable and input pins of high-side load switches (e.g., HS2950P) in remote meters and robotics against 1kV surge events. IC Role / Device Role / Timing Role: Primary front-end protector absorbing >1120W peak pulse energy to prevent gate oxide rupture or drain-source breakdown in the load switch FET. Use Value: 20mΩ dynamic resistance limits voltage overshoot to <28V - keeps stress below 30V absolute maximum rating of typical 30V load switches. |
| IoT Device Power Rail Protection | Notebook/Tablet DC Input Protection |
|
Use Scenario: Securing 12–24V DC input rails in battery-powered sensors and edge nodes exposed to ESD during field servicing or docking. IC Role / Device Role / Timing Role: Single-component solution replacing multi-stage TVS+MOV networks - responds in <1ns to divert transients before downstream LDOs or PMICs are stressed. Use Value: ±30kV ESD rating and 40A surge capacity eliminate need for secondary protection, reducing BOM count and PCB area in space-constrained modules. |
Use Scenario: Hardening 19.5V adapter input on ultrabooks and tablets against accidental AC line coupling and ESD from user interface ports. IC Role / Device Role / Timing Role: First-line defense on main DC-in net, placed adjacent to barrel jack or USB-C port to minimize trace inductance and coupling to sensitive analog circuits. Use Value: 175pF capacitance avoids resonance with input bulk capacitors - prevents ringing-induced overvoltage spikes that could trigger system reset or brownout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A | Standard unidirectional TVS diode; 35.1V clamping at 12.4A (8/20μs); 1.5× larger SMC package; no temperature-stable clamping. | Limited to lower-energy transients; requires derating above 85°C; unsuitable for 40A surge compliance. | Choose SMAJ22A only for cost-sensitive, low-surge environments where 28V clamping margin is not critical. |
| TDS2211P | Same die, identical electrical specs and DFN-6 package; differs only in marking code and reel packaging - fully interchangeable with 1N6472US. | No functional difference; used interchangeably in USB Type-C reference designs by Semtech. | Select TDS2211P when sourcing from distributors listing that part number; electrically and mechanically identical to 1N6472US. |
Compared with SMAJ22A, 1N6472US delivers 40A surge handling and flat clamping across temperature - critical for USB PD and industrial reliability. Against TDS2211P, it is a marking variant with identical performance, enabling dual-sourcing without design change.
Availability
1N6472US is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT device DC rails requiring stable component supply, long-term lifecycle support, and RoHS-compliant surge protection.
Supply support for 1N6472US 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 power management, protection, and signal integrity.
The 1N6472US belongs to Semtech's Transient Diverting Suppressor (TDS) product line - engineered specifically to replace conventional TVS diodes in high-reliability 20–24V power rail protection with superior clamping stability and surge endurance.
FAQ
What is the clamping voltage of the 1N6472US at 40A surge current?
The 1N6472US clamps at 27.6–28V under 40A peak pulse current (tp = 1.2/50μs voltage + 8/20μs current combination waveform, RS = 2Ω). This value is guaranteed across −40°C to +125°C and reflects its FET-based architecture - unlike TVS diodes, clamping does not increase with current or temperature. The 1N6472US maintains this tight window to protect 30V-rated downstream components reliably.
Is the 1N6472US pin-compatible with TDS2211P?
Yes - the 1N6472US and TDS2211P share identical DFN-6 package dimensions, pin configuration (pins 1–3 = GND, pins 4–6 = IN), and electrical specifications. They differ only in marking code and tape-and-reel packaging; Semtech qualifies them as functionally and mechanically interchangeable. The 1N6472US is a valid drop-in replacement for TDS2211P in existing designs.
Can the 1N6472US be used on data lines like USB SuperSpeed differential pairs?
No - the 1N6472US is not suitable for high-speed data lines. Its 175pF junction capacitance would severely degrade signal integrity on USB 3.x or PCIe lanes. It is designed exclusively for power rails and low-bandwidth I/O such as USB PD VBus, CC lines (with appropriate voltage rating), or load switch inputs. For SuperSpeed lines, Semtech recommends RClamp3371ZC (<0.25pF).
What is the maximum operating temperature for continuous use of the 1N6472US?
The 1N6472US supports continuous operation from −40°C to +125°C ambient temperature. Its clamping voltage and leakage current remain within specification across this full range, as confirmed by characterization data in the datasheet. Junction temperature may reach +150°C during transient events, but steady-state thermal design should ensure TA ≤ +125°C for long-term reliability.
Does the 1N6472US require a thermal pad or heatsink on the PCB?
No - the 1N6472US does not require a thermal pad or external heatsink. Its DFN-6 package dissipates surge energy internally via the silicon FET structure, not through junction-to-case conduction. Layout guidelines emphasize low-inductance grounding (multiple vias to solid ground plane) and placement near the protected connector - not thermal mass. The 0.55mm profile and UL 94V-0 compound support standard reflow profiles without thermal derating.
1N6472US Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- SQ-MELF, G
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.4V
- Voltage - Clamping (Max) @ Ipp:
- 26.5V
- Current - Peak Pulse (10/1000µs):
- 57A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- G-MELF (D-5C)
1N6472US FAQ
1.How can I place an order for 1N6472US through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6472US 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 1N6472US reliable?
The price and inventory of 1N6472US are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6472US is usually 5 days.
3.What payment methods are accepted for 1N6472US?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6472US transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6472US?
1N6472US orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6472US 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 1N6472US?
For technical support, including 1N6472US datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6472US requirements.
6.How does Aetrix verify that 1N6472US is sourced from the original manufacturer or authorized distributors?
All 1N6472US 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 1N6472US meets industry standards.
7.What is the process for return or replacement of 1N6472US?
All 1N6472US units undergo pre-shipment inspection (PSI). If there is an issue with 1N6472US, 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 1N6472US part is unused and in its original packaging.
Return procedure for 1N6472US:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6472US Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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