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Semtech Corporation 1N6151
- Part No.:
- 1N6151
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- Axial
- Datasheet:
-
1N6151.pdf
- Description:
- TVS DIODE 18.2VWM 34.8VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:4,746
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Product details
Overview
1N6151 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, USB Type-C VBus, and load switch inputs in industrial and portable electronics.
For engineers reviewing the 1N6151 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, DFN-6 package layout guidance, real-world clamping stability across temperature and current, and direct alternatives for 22V bus protection with constant-voltage surge suppression.
Technical Context
The 1N6151 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-from 24A to 40A and across –40°C to +125°C due to decreasing RDS(on) under surge.
It operates as a three-terminal bidirectional device: pins 4–6 serve as the protected input (IN), pins 1–3 as ground (GND), and achieves <175pF junction capacitance at 22V bias. Its solid-state architecture avoids junction heating limitations, enabling stable energy dissipation without thermal pad requirements.
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 40A (8/20μs) - ensures downstream ICs (e.g., USB PD controllers) remain below damage threshold during worst-case surges. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity with 2Ω source impedance. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD requirements without degradation. |
| Dynamic Resistance | 20mΩ - enables flat clamping response; voltage rise per amp is negligible (<0.02V/A), unlike TVS diodes with fixed RDYN. |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough for 22V power rail protection without signal integrity impact on adjacent traces. |
| Operating Temperature | –40°C to +125°C - supports deployment in industrial enclosures, automotive under-hood modules, and ruggedized IoT edge nodes. |
Pinout & Package
1N6151 is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad not required. All six terminals are functional: three GND pins (1–3) and three IN pins (4–6) must be connected in parallel for full 40A rating and optimal surge path inductance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return for surge current; all three must be connected to minimize inductance and maximize current sharing. |
| 4, 5, 6 | IN | Protected line input (bidirectional); connects directly to VBus or power rail; all three pins carry equal surge current share. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V from 24A to 40A and remains stable across –40°C to +125°C-enabling predictable protection without derating. |
| Low dynamic resistance | 20mΩ measured between 1A–40A (8/20μs) ensures minimal IR drop during surge, eliminating voltage overshoot seen in TVS diodes. |
| High-energy ESD robustness | ±30kV contact/air per IEC 61000-4-2 - survives repeated human-body-model discharges without parameter shift or failure. |
| DFN-6 space efficiency | 1.6mm × 1.6mm footprint saves >60% board area vs. SOT-23 or SOIC TVS solutions rated for comparable 40A surge. |
| No thermal pad requirement | Surge energy is dissipated via FET channel conduction-not junction heating-eliminating need for thermal vias or copper pour. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting 20V–22V VBus lines in USB-C ports supporting up to 100W PD, exposed to lightning-induced surges and hot-plug ESD. IC Role / Device Role / Timing Role: Transient diverting suppressor placed at connector entry point; activates within nanoseconds to shunt surge current to ground before reaching PD controller. Use Value: Maintains 27.5–28V clamping across full temperature range-prevents overvoltage damage to sensitive PD controllers where conventional TVS would exceed 35V at 125°C. |
Use Scenario: Safeguarding enable and input rails of high-side load switches (e.g., HS2950P) in remote meters, robotics, and factory automation systems. IC Role / Device Role / Timing Role: Primary front-end surge clamp; absorbs 40A transients while limiting voltage across load switch FET drain-source to safe levels. Use Value: Prevents gate oxide rupture and latch-up in load switches by holding clamping voltage well below their absolute maximum ratings (typically 30–36V). |
| IoT Edge Node Power Rail Protection | Notebook/Tablet DC-DC Input Protection |
|
Use Scenario: Securing 22V input rails of battery-powered IoT gateways and cellular modems deployed outdoors or in electrically noisy environments. IC Role / Device Role / Timing Role: Solid-state EOS protector on main power entry; handles repetitive EFT bursts (±4kV, 5/50ns) and infrequent lightning surges. Use Value: Delivers 175pF capacitance and <600nA leakage at 22V-minimizing standby power loss and avoiding interference with low-power sleep modes. |
Use Scenario: Protecting buck converter inputs in ultrabooks and tablets where compact size, low profile, and reliability under thermal cycling are critical. IC Role / Device Role / Timing Role: Compact DFN-6 transient suppressor mounted adjacent to DC jack or USB-C port; provides first-line defense against user-handling ESD. Use Value: 1.6mm × 1.6mm footprint fits tight layout constraints near connectors; RoHS/UL 94V-0 compliance meets global safety certifications. |
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; 22V standoff, 35.5V clamping at 12.3A (8/20μs); 10× higher dynamic resistance (~200mΩ). | Higher clamping voltage increases risk of downstream IC damage at elevated temperatures or full surge current. | Choose only if cost sensitivity outweighs clamping performance and thermal stability requirements. |
| TDS2211P | Same die, identical electrical specs and package; 1N6151 is Semtech's alternate orderable part number for TDS2211P per official ordering documentation. | No functional difference; used interchangeably in BOMs and layout designs. | Select 1N6151 when sourcing through distribution channels listing this part number; identical design-in and qualification. |
Compared with SMAJ22A, 1N6151 delivers 8.5V lower clamping at 40A and stable performance across temperature-critical for protecting modern 22V PD controllers. Compared with TDS2211P, 1N6151 is a manufacturer-confirmed alternate marking with zero design or qualification impact.
Availability
1N6151 is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch interfaces, and IoT edge node power rails requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/REACH compliance.
Supply support for 1N6151 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, sensing, and connectivity.
The 1N6151 belongs to Semtech's Transient Diverting Suppressor (TDS) product line-engineered specifically to replace conventional TVS diodes in high-reliability 20–30V power rail protection with superior clamping stability and surge handling.
FAQ
What is the exact package type and dimensions of the 1N6151?
The 1N6151 is supplied in a 6-pin DFN package measuring 1.6mm × 1.6mm × 0.55mm with no exposed thermal pad. Pin 1 is marked by a laser dot; pins 1–3 are GND, pins 4–6 are IN. The land pattern follows Semtech's recommended layout with multiple vias to ground plane for lowest inductance. This package enables high-density placement near connectors without thermal management overhead.
How does the 1N6151 achieve constant clamping voltage across varying surge currents?
The 1N6151 uses a precision-triggered surge-rated FET instead of a PN-junction diode. When an EOS event occurs, the trigger circuit activates the FET, whose RDS(on) decreases as current rises-resulting in near-constant voltage drop (27.5–28V) from 24A to 40A. This contrasts with TVS diodes, where VC = VBR + IPP × RDYN causes linear voltage rise with current.
Can the 1N6151 be used for bidirectional signal line protection such as USB DP/DM?
No-the 1N6151 is optimized for unidirectional 22V power rail or high-current I/O protection (e.g., VBus, load switch inputs), not low-capacitance data lines. Its 175pF junction capacitance would severely degrade USB 2.0 or SuperSpeed signal integrity. For DP/DM lines, Semtech recommends RClamp3371ZC (<0.25pF); the 1N6151 should be reserved for power-domain protection only.
What is the maximum operating temperature and how does clamping voltage change with temperature?
The 1N6151 is rated for operation from –40°C to +125°C. Clamping voltage remains tightly controlled between 27.5V and 28V across this full range at 40A (8/20μs), as confirmed in Figure 3 of the datasheet. This stability eliminates thermal derating-unlike standard TVS diodes whose clamping rises significantly with temperature.
Is the 1N6151 pin-compatible with other Semtech TDS devices like TDS2411P or TDS3311P?
No-1N6151 (TDS2211P) has a unique 6-pin DFN layout optimized for 22V operation and is not pin-compatible with TDS2411P (24V) or TDS3311P (33V), which use different internal FET sizing and trigger thresholds. Each requires dedicated PCB layout; substitution mandates redesign. Always verify pin configuration and electrical specs per device datasheet before replacement.
1N6151 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- Axial
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 18.2V (Max)
- Voltage - Breakdown (Min):
- 21.6V
- Voltage - Clamping (Max) @ Ipp:
- 34.8V
- Current - Peak Pulse (10/1000µs):
- 43.1A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
1N6151 FAQ
1.How can I place an order for 1N6151 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6151 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 1N6151 reliable?
The price and inventory of 1N6151 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6151 is usually 5 days.
3.What payment methods are accepted for 1N6151?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6151 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6151?
1N6151 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6151 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 1N6151?
For technical support, including 1N6151 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6151 requirements.
6.How does Aetrix verify that 1N6151 is sourced from the original manufacturer or authorized distributors?
All 1N6151 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 1N6151 meets industry standards.
7.What is the process for return or replacement of 1N6151?
All 1N6151 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6151, 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 1N6151 part is unused and in its original packaging.
Return procedure for 1N6151:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6151 Tags
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