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Semtech Corporation 1N6468
- Part No.:
- 1N6468
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- Axial
- Datasheet:
-
1N6468.pdf
- Description:
- TVS DIODE 51.6VWM 78.5VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:4,163
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Product details
Overview
1N6468 from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection of 22V voltage buses 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 ultra-low 20mΩ dynamic resistance. It protects USB PD, USB Type-C VBus, and load switch inputs in industrial and IoT equipment.
For engineers reviewing the 1N6468 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 1N6468 uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit when transient voltage exceeds breakdown threshold. This architecture delivers near-constant clamping voltage independent of peak pulse current magnitude or operating temperature.
Unlike standard TVS diodes whose clamping voltage rises linearly with IPP (VC = VBR + IPP × RDYN), the 1N6468 maintains clamping at ~27.5–28V from 24A to 40A and across −40°C to +125°C - verified by typical characteristics curves in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC or RMS operating voltage on protected line without leakage or conduction. |
| Clamping Voltage | 27.5–28V at 24–40A (1.2/50μs + 8/20μs combo wave, RS = 2Ω) - ensures downstream ICs (e.g., USB PD controllers) remain below damage thresholds during surges. |
| Peak Pulse Current | 40A (8/20μs) - supports compliance with IEC 61000-4-5 Level 4 (±1kV, RS = 42Ω) on unsymmetrical lines. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds industrial and consumer ESD immunity requirements without derating. |
| Dynamic Resistance | 20mΩ (measured 1–40A, 8/20μs) - enables low-voltage drop under surge, minimizing power dissipation and thermal stress. |
| Junction Capacitance | 175pF @ 22V, 1MHz - compatible with 22V bus protection where signal integrity is secondary to robustness (e.g., VBus, power rails). |
Pinout & Package
1N6468 is housed in a RoHS-compliant DFN 1.6mm × 1.6mm × 0.55mm 6-lead package with exposed pad not electrically connected. All pins must be soldered: pins 1–3 are tied to system ground; pins 4–6 connect directly to the protected line (e.g., USB PD VBus).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path for surge current; all three must be connected to minimize inductance and maximize 40A handling. |
| Pins 4, 5, 6 | IN | Parallel-connected input terminals for protected line; equal current sharing across terminals ensures rated 40A capability and thermal balance. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based shunt architecture | Enables flat clamping voltage vs. current and temperature - eliminates design margin inflation needed for conventional TVS devices. |
| Ultra-low dynamic resistance | 20mΩ sustains low power dissipation (P = I²R) during 40A transients, reducing thermal stress and PCB layout constraints. |
| High-energy surge rating | 1120W peak pulse power (8/20μs) supports industrial-grade lightning and EFT protection without external series impedance. |
| Low leakage & stable capacitance | 600nA max IR at 22V and 175pF @ 1MHz enable reliable long-term operation on 22V rails without signal loading or drift. |
Applications
| USB Type-C VBus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting USB PD 20–22V VBus lines against ESD, lightning-induced surges, and connector hot-plug transients. IC Role / Device Role / Timing Role: Primary shunt protector placed at connector entry point, clamping transients before they reach PD controller or power delivery ICs. Use Value: Maintains 27.5–28V clamping across full 40A/−40°C–+125°C range - prevents overvoltage damage to sensitive 24V-tolerant PD controllers without thermal derating. |
Use Scenario: Safeguarding input pins of industrial load switches (e.g., HS2950P) against EOS events in remote meters, robotics, and factory automation. IC Role / Device Role / Timing Role: Front-end transient suppressor that limits voltage seen by internal FET gate oxide and drain-source junction during surge events. Use Value: Clamps below 28V even at 40A and 125°C - avoids catastrophic failure of load switch FETs rated for ≤30V absolute maximum. |
| IoT Device Power Rail Protection | Storage Device 22V Bus Protection |
Use Scenario: Securing 22V auxiliary power rails in battery-backed IoT gateways and edge sensors exposed to field ESD and induced surges. IC Role / Device Role / Timing Role: Standalone EOS suppressor on main DC input rail, replacing bulkier multi-stage protection schemes. Use Value: 1.6×1.6mm DFN footprint saves >60% board area versus discrete TVS + MOV solutions while delivering superior clamping consistency. |
Use Scenario: Protecting 22V supply lines in NVMe SSD enclosures and enterprise storage backplanes subject to hot-swap and cable discharge events. IC Role / Device Role / Timing Role: High-reliability transient clamp on primary power input, coordinated with low-capacitance TVS on data lanes. Use Value: 175pF capacitance avoids resonance or signal distortion on power rails, while ±30kV ESD rating ensures robustness during handling and maintenance. |
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; clamping rises to ~42V at 40A (8/20μs); higher dynamic resistance (~0.5Ω); no temperature stability guarantee. | Requires larger voltage margin for downstream ICs; unsuitable for high-temp industrial environments where clamping must stay <30V. | Select only if cost sensitivity outweighs clamping precision and thermal stability requirements. |
| TDS2211P | Same FET-based TDS architecture, identical 22V working voltage, 40A rating, and DFN 1.6×1.6mm package - but marked as TDS2211P per Semtech ordering code. | Functionally identical to 1N6468; used interchangeably in Semtech documentation and reference designs (e.g., USB Type-C protection schematics). | Direct functional replacement with same electrical, thermal, and mechanical behavior - verify marking and reel labeling per procurement channel. |
Compared with SMAJ22A and TDS2211P, the 1N6468 delivers unique constant-clamp performance across current and temperature, enabling tighter voltage margins in 22V systems; TDS2211P is a pin-identical, functionally equivalent variant, while SMAJ22A requires significant derating for equivalent protection.
Availability
1N6468 is available at Aetrix Electronics and suitable for USB Type-C power delivery, industrial load switch inputs, and IoT 22V rail protection requiring stable component supply, long-lifecycle assurance, and traceable sourcing.
Supply support for 1N6468 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, protection, and connectivity.
The 1N6468 belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 22V bus protection where clamping voltage stability across temperature and current is critical.
FAQ
What is the primary protection function of the 1N6468?
The 1N6468 functions as a transient diverting suppressor that shunts high-energy EOS events-such as ESD, lightning surges, and EFT-to ground using an integrated surge-rated FET. Unlike TVS diodes, it maintains a stable ~27.5–28V clamping voltage from 24A to 40A and across −40°C to +125°C, making it ideal for protecting 22V power rails in USB PD and industrial systems. The 1N6468 achieves this via a precision trigger circuit that activates the FET when voltage exceeds threshold.
Does the 1N6468 require external bias or control signals?
No, the 1N6468 operates autonomously with no external bias, enable pins, or configuration interfaces. It is a passive protection device: pins 1–3 connect directly to system ground, and pins 4–6 connect to the protected line (e.g., VBus). Its internal trigger circuit self-activates during overvoltage events, turning on the shunt FET without user intervention. This makes the 1N6468 simple to integrate-no firmware, timing constraints, or supporting components are needed beyond proper PCB layout per Semtech's guidelines.
How does the 1N6468 differ from standard TVS diodes like SMAJ22A?
The 1N6468 uses a FET-based shunt architecture instead of a pn-junction diode, resulting in near-constant clamping voltage (~27.5–28V) across its full 40A rating and operating temperature range. In contrast, SMAJ22A exhibits rising clamping (to ~42V at 40A) due to fixed dynamic resistance. The 1N6468 also offers lower dynamic resistance (20mΩ vs. ~0.5Ω), higher ESD rating (±30kV vs. ±30kV contact only), and better thermal stability - critical for industrial and automotive-adjacent applications where ambient temperature varies widely.
What is the recommended PCB layout for optimal performance of the 1N6468?
Semtech specifies that all three GND pins (1–3) and all three IN pins (4–6) must be connected with short, wide traces and multiple vias to inner ground planes to minimize parasitic inductance. The 1N6468 must be placed within 2 mm of the protected connector (e.g., USB Type-C receptacle), with no other components between it and the entry point. A solid ground plane beneath the DFN package is required; no thermal pad is needed since energy is dissipated in the FET channel, not the junction. These rules ensure the 1N6468 delivers its rated 40A surge capability and fast response to sub-nanosecond ESD events.
Is the 1N6468 RoHS compliant and halogen free?
Yes, the 1N6468 is fully RoHS/WEEE compliant and halogen free, with lead-free termination and UL 94V-0 molding compound. Its DFN 1.6mm × 1.6mm × 0.55mm package meets IPC/JEDEC standards for reflow soldering, including peak temperatures up to 260°C. Semtech confirms compliance in the official datasheet (Rev 2.5, Nov 2021), and Aetrix Electronics sources only certified production lots with full material declarations and test reports traceable to Semtech's manufacturing site.
1N6468 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):
- 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:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
1N6468 FAQ
1.How can I place an order for 1N6468 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6468 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 1N6468 reliable?
The price and inventory of 1N6468 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6468 is usually 5 days.
3.What payment methods are accepted for 1N6468?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6468 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6468?
1N6468 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6468 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 1N6468?
For technical support, including 1N6468 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6468 requirements.
6.How does Aetrix verify that 1N6468 is sourced from the original manufacturer or authorized distributors?
All 1N6468 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 1N6468 meets industry standards.
7.What is the process for return or replacement of 1N6468?
All 1N6468 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6468, 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 1N6468 part is unused and in its original packaging.
Return procedure for 1N6468:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6468 Tags
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ESD9B5.0ST5G
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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