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Semtech Corporation 1N6464US
- Part No.:
- 1N6464US
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SQ-MELF
- Datasheet:
-
1N6464US.pdf
- Description:
- TVS DIODE 15VWM 26.5VC
- Quantity:
- Payment:
- Shipping:
Inventory:7,212
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Product details
Overview
1N6464US 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 and Type-C VBUS lines in industrial and portable electronics.
For engineers reviewing the 1N6464US datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, real-world clamping stability across temperature and current, and validated alternatives for 22V bus protection design.
Technical Context
The 1N6464US 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-27.5–28V across 24A to 40A and −40°C to +125°C-due to decreasing RDS(on) under surge.
It operates with reverse stand-off voltage (VRWM) of 22V, breakdown voltage (VBR) of 25–27.9V at 1mA, and low junction capacitance (175pF @ 22V, 1MHz), enabling use on high-speed power rails without signal integrity compromise.
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 + 1.2/50μs combo wave) - stays below 30V damage threshold of common load switches and PD controllers |
| Peak Pulse Current | 40A (8/20μs) - satisfies 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 61000-4-2 Class 4 requirements |
| Dynamic Resistance | 20mΩ - enables stable clamping independent of current magnitude and temperature drift |
| Junction Capacitance | 175pF @ 22V, 1MHz - low enough to avoid degrading rise/fall times on 20V power rails |
Pinout & Package
1N6464US is housed in a RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad not required; all six terminals are surface-mount, lead-free, and UL 94V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path for surge current; all three must be connected to maximize current handling and minimize parasitic inductance |
| Pins 4, 5, 6 | IN | Protected line input (e.g., VBUS); parallel connection ensures uniform current sharing and full 40A rating |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies <0.5V from 24A to 40A and −40°C to +125°C - eliminates thermal derating uncertainty in industrial deployments |
| FET-based shunt protection | Surge energy dissipated in low-RDS(on) channel instead of PN junction - avoids thermal runaway and enables repeatable surge endurance |
| Low dynamic resistance | 20mΩ measured between 1A–40A - ensures minimal IR drop during surge, preserving downstream overvoltage margin |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 5kHz & 100kHz) - protects against repetitive fast transients in motor drives and PLC I/O |
Applications
| USB Type-C Power Delivery | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting VBUS line in USB-C receptacles supporting up to 20V/5A PD negotiation. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at connector to clamp lightning-induced surges and ESD before reaching PD controller IC. Use Value: Maintains 27.5–28V clamping across temperature and current - prevents false overvoltage shutdown and ensures PD controller survival under worst-case 40A surge. |
Use Scenario: Shielding 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 EOS protector absorbing 8/20μs surges before they stress internal FET gate oxide or drain-source junction. Use Value: Clamping stays ≤28V at 125°C - keeps below typical 30V absolute maximum rating of load switch inputs, avoiding latch-up or permanent damage. |
| IoT Edge Node Power Rails | Storage Device DC Input Protection |
Use Scenario: Securing 12–24V DC input of battery-powered IoT gateways exposed to field ESD and induced surges. IC Role / Device Role / Timing Role: Single-component solution replacing multi-stage TVS+MOV networks to reduce BOM count and PCB area. Use Value: 1.6mm × 1.6mm footprint saves >60% board space vs. SOD-123 TVS while delivering higher surge rating and tighter clamping control. |
Use Scenario: Hardening SATA or M.2 power inputs in enterprise SSDs and NAS enclosures against hot-plug transients and backplane coupling. IC Role / Device Role / Timing Role: Low-capacitance (175pF) shunt device placed at connector to limit overshoot without affecting power rail stability. Use Value: Reverse leakage <600nA at 22V ensures negligible standby current drain - critical for always-on storage subsystems with tight power budgets. |
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 electrical specs and DFN-6 package - direct functional and mechanical match for 1N6464US | Identical use case: 22V bus protection with constant-clamp behavior | Select when sourcing from Semtech's official distribution channel with traceable lot data |
| SMAJ22A | Standard unidirectional TVS diode; VBR = 24.4–26.9V, VC = 35.5V @ 12.3A; no constant-clamp behavior; higher clamping drift with temperature/current | Acceptable only where 35.5V clamping is within downstream IC tolerance and thermal derating is managed externally | Choose only if cost sensitivity outweighs clamping precision and temperature stability requirements |
Compared with TDS2211P and SMAJ22A, the 1N6464US delivers identical performance to TDS2211P in form, fit, and function, while offering superior clamping stability and lower dynamic resistance than SMAJ22A-making it optimal for compact, thermally demanding, or high-reliability 22V rail protection.
Availability
1N6464US 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, long-term lifecycle support, and guaranteed RoHS/REACH compliance.
Supply support for 1N6464US 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 analog and mixed-signal ICs for precision protection, sensing, and connectivity.
The 1N6464US belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-reliability 22V power rail protection with constant-voltage clamping and superior thermal stability.
FAQ
What is the exact package type and dimensions of the 1N6464US?
The 1N6464US uses a DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with three ground pins (1–3) and three input pins (4–6). It is Pb-free, halogen-free, RoHS/WEEE compliant, and carries UL 94V-0 flammability rating. No thermal pad is required, and all six pins must be soldered for full 40A surge rating.
How does the 1N6464US achieve constant clamping voltage across varying surge currents?
The 1N6464US achieves constant clamping via a surge-rated FET whose RDS(on) decreases under high-current conditions, counteracting the linear VC = VBR + IPP × RDYN behavior of standard TVS diodes. This results in clamping voltage tightly bounded between 27.5V and 28V from 24A to 40A - a key advantage confirmed in Semtech's TDS2211P datasheet.
Is the 1N6464US suitable for protecting USB Type-C VBUS lines operating up to 20V?
Yes - the 1N6464US has a 22V working voltage (VRWM) and 25–27.9V breakdown (VBR), making it ideal for USB Type-C VBUS protection where nominal voltage reaches 20V and transient margins must stay below 30V. Its ±30kV ESD rating and 40A surge capability align with USB IF and IEC 61000-4-5 requirements.
What is the junction capacitance of the 1N6464US, and how does it affect power rail performance?
The 1N6464US exhibits 175pF junction capacitance at 22V and 1MHz. This low value minimizes impact on rise/fall times and ripple stability on 20–24V power rails, unlike higher-capacitance TVS devices that can cause ringing or slow response. It supports clean, fast clamping without compromising power integrity.
Does the 1N6464US require external biasing or control signals to operate?
No - the 1N6464US is a fully passive, self-triggering device. Its internal precision trigger circuit activates the shunt FET automatically when transient voltage exceeds breakdown, requiring no external power, enable signals, or configuration. It functions identically to a TVS diode in placement and operation but with superior clamping behavior.
1N6464US 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):
- 15V
- Voltage - Breakdown (Min):
- 16.4V
- Voltage - Clamping (Max) @ Ipp:
- 26.5V
- Current - Peak Pulse (10/1000µs):
- 19A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
1N6464US FAQ
1.How can I place an order for 1N6464US through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6464US 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 1N6464US reliable?
The price and inventory of 1N6464US are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6464US is usually 5 days.
3.What payment methods are accepted for 1N6464US?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6464US transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6464US?
1N6464US orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6464US 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 1N6464US?
For technical support, including 1N6464US datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6464US requirements.
6.How does Aetrix verify that 1N6464US is sourced from the original manufacturer or authorized distributors?
All 1N6464US 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 1N6464US meets industry standards.
7.What is the process for return or replacement of 1N6464US?
All 1N6464US units undergo pre-shipment inspection (PSI). If there is an issue with 1N6464US, 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 1N6464US part is unused and in its original packaging.
Return procedure for 1N6464US:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6464US Tags
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onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
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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