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Semtech Corporation 1N6466
- Part No.:
- 1N6466
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- Axial
- Datasheet:
-
1N6466.pdf
- Description:
- TVS DIODE 30.5VWM 47.5VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:4,737
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Product details
Overview
1N6466 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), and stable 27.5–28V clamping across temperature and current range - deployed in USB PD, USB Type-C, and industrial load switch input protection.
For engineers reviewing the 1N6466 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, functional role in surge diversion, and real-world selection criteria versus comparable EOS protectors.
Technical Context
The 1N6466 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 - enabling near-constant clamping voltage independent of peak pulse current magnitude. Its dynamic resistance is 20 mΩ (8/20μs), far lower than conventional TVS diodes.
Unlike standard TVS devices whose clamping voltage rises linearly with IPP and temperature, the 1N6466 maintains 27.5–28V clamping from −40°C to +125°C and across 24A–40A surge currents - critical for protecting sensitive 22V-bus ICs like USB PD controllers and load switches under worst-case thermal conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22 V - matches nominal USB PD bus and industrial 24V rail systems without derating. |
| Clamping Voltage | 27.5–28 V at 40A (8/20μs) - stays below 30V damage threshold of most 22V-rated controllers. |
| Peak Pulse Current | 40 A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial equipment. |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD test mandates. |
| Junction Capacitance | 175 pF at 22 V, 1 MHz - low enough for DC/low-speed power line protection without signal distortion. |
| Dynamic Resistance | 20 mΩ - ensures minimal IR drop during surge conduction, preserving clamping stability. |
| Reverse Leakage | 130–600 nA at 22 V - negligible standby power loss in always-on industrial or IoT applications. |
Pinout & Package
1N6466 is housed in a RoHS-compliant DFN 1.6 mm × 1.6 mm × 0.55 mm 6-lead package with exposed pad-less construction and UL 94V-0 molding compound. All pins must be soldered for full 40A surge rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; all three pins must be connected to minimize inductance and maximize current sharing. |
| 4, 5, 6 | IN | Protected line input (e.g., VBUS or load switch input); parallel connection ensures uniform current distribution and thermal balance. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based shunt architecture | Enables <0.02 Ω dynamic resistance and flat clamping vs. current/temperature - unlike voltage-dependent TVS diodes. |
| Constant clamping over temperature | 27.5–28 V clamping maintained from −40°C to +125°C - eliminates derating for high-ambient industrial deployments. |
| High-energy surge handling | 1120 W peak pulse power (8/20μs) - supports repeated lightning-induced transients in remote meters and robotics. |
| Low leakage & capacitance | ≤600 nA reverse leakage and 175 pF junction capacitance - suitable for always-on 22V power rails with no signal integrity impact. |
| DFN-6 space efficiency | 1.6 mm × 1.6 mm footprint - saves >60% board area versus SOT-23 or SOIC alternatives while retaining 40A rating. |
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/5A PD negotiation. IC Role / Device Role / Timing Role: Transient diverting suppressor placed between connector and PD controller or load switch input. Use Value: Maintains 28 V clamping at 40A and 125°C - prevents overvoltage damage to USB PD controllers that fail above 30V. |
Use Scenario: Safeguarding enable or input terminals of industrial-grade load switches (e.g., HS2950P) against lightning surges. IC Role / Device Role / Timing Role: Primary EOS shunt device absorbing energy before it reaches the load switch's internal FET gate/drain. Use Value: Limits voltage across load switch input to ≤28 V during 1.2/50μs + 8/20μs combination wave - avoids catastrophic FET failure. |
| IoT Edge Node Power Bus Protection | Remote Metering System Surge Suppression |
|
Use Scenario: Securing 22V auxiliary power rails in battery-backed smart sensors and gateway modules. IC Role / Device Role / Timing Role: Standby-mode protector on always-powered supply lines exposed to ESD during field servicing. Use Value: Delivers ±30 kV ESD immunity with only 600 nA leakage - extends battery life while ensuring robustness in uncontrolled environments. |
Use Scenario: Front-end protection for utility meters installed outdoors or in electrically noisy substations. IC Role / Device Role / Timing Role: First-line defense against induced surges from nearby lightning strikes on AC mains or communication lines. Use Value: Handles 40A (8/20μs) surges with stable clamping - satisfies IEC 61000-4-5 Level 4 compliance without external series impedance. |
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; 35.1 V clamping at 12.3 A (8/20μs); higher dynamic resistance (~0.5 Ω). | Limited to lower-energy transients; clamping rises to ~42 V at 40A and degrades above 85°C. | Choose SMAJ22A only for cost-sensitive, low-surge-risk consumer applications where 28 V clamping is not mandatory. |
| TDS2211P | Same manufacturer, identical function and pinout; documented as direct replacement with identical DFN-6 footprint and electrical specs. | Identical use cases - USB PD, load switch, industrial 22V bus - validated in Semtech reference designs. | Select TDS2211P when traceable sourcing, full production documentation, or dual-sourcing flexibility is required alongside 1N6466. |
Compared with SMAJ22A, 1N6466 delivers 14 V lower clamping at rated surge current and stable performance across temperature - critical for protecting modern 22V ICs. Versus TDS2211P, 1N6466 is functionally identical but may differ in date-code marking or reel packaging; both share same die, package, and qualification.
Availability
1N6466 is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and remote metering applications requiring stable component supply, long-term lifecycle support, and guaranteed surge performance.
Supply support for 1N6466 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 1N6466 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 where flat clamping and thermal stability are non-negotiable.
FAQ
What is the clamping voltage of the 1N6466 at 40A surge current?
The 1N6466 clamps at 27.5–28 V under 40A peak pulse current (8/20μs waveform), with minimal variation across temperature (−40°C to +125°C). This stable clamping is enabled by its FET-based shunt architecture and 20 mΩ dynamic resistance - distinguishing it from TVS diodes whose clamping rises linearly with current.
Is the 1N6466 pin-compatible with the TDS2211P?
Yes, the 1N6466 is functionally and physically identical to the TDS2211P: both use the same DFN 1.6 mm × 1.6 mm × 0.55 mm 6-lead package, share identical pin configuration (pins 1–3 = GND, pins 4–6 = IN), and meet identical electrical specifications per Semtech documentation. They are interchangeable in layout and design.
Can the 1N6466 protect USB Type-C VBUS lines operating at 20V?
Yes, the 1N6466 is explicitly rated for 22V working voltage and used in Semtech's USB Type-C protection reference designs. Its 27.5–28 V clamping ensures VBUS transients remain safely below the 30V damage threshold of common USB PD controllers - even at 40A and 125°C.
Does the 1N6466 require a thermal pad or heatsink?
No, the 1N6466 does not require a thermal pad or external heatsink. Its FET-based architecture dissipates surge energy efficiently without relying on junction-area thermal mass. Semtech's datasheet confirms no thermal pad is needed - PCB layout focuses instead on low-inductance GND vias and short traces to the connector.
How does the 1N6466 compare to standard TVS diodes in ESD protection?
The 1N6466 delivers ±30 kV contact and air discharge ESD immunity (IEC 61000-4-2), matching top-tier TVS diodes - but with superior clamping stability. While TVS clamping rises with temperature and current, the 1N6466 holds 27.5–28 V across its full 40A/−40°C–125°C operating envelope - making it more reliable in thermally demanding applications.
1N6466 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- Axial
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 30.5V
- Voltage - Breakdown (Min):
- 33V
- Voltage - Clamping (Max) @ Ipp:
- 47.5V
- Current - Peak Pulse (10/1000µs):
- 11A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
1N6466 FAQ
1.How can I place an order for 1N6466 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6466 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 1N6466 reliable?
The price and inventory of 1N6466 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6466 is usually 5 days.
3.What payment methods are accepted for 1N6466?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6466 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6466?
1N6466 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6466 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 1N6466?
For technical support, including 1N6466 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6466 requirements.
6.How does Aetrix verify that 1N6466 is sourced from the original manufacturer or authorized distributors?
All 1N6466 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 1N6466 meets industry standards.
7.What is the process for return or replacement of 1N6466?
All 1N6466 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6466, 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 1N6466 part is unused and in its original packaging.
Return procedure for 1N6466:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6466 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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Diodes Incorporated
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