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Semtech Corporation 1N6159AUS
- Part No.:
- 1N6159AUS
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SQ-MELF
- Datasheet:
-
1N6159AUS.pdf
- Description:
- TVS DIODE 38.8VWM 70.1VC
- Quantity:
- Payment:
- Shipping:
Inventory:6,118
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Product details
Overview
1N6159AUS 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 1N6159AUS 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 validated alternatives for 22V bus protection design.
Technical Context
The 1N6159AUS 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 24–40A and −40°C to +125°C - due to decreasing RDS(on) under surge.
It operates with 22V reverse stand-off voltage (VRWM), 25–27.9V breakdown (VBR), and 175pF junction capacitance at 22V/1MHz. Its 6-pin DFN package integrates three parallel input terminals (Pins 4–6) and three ground terminals (Pins 1–3) to minimize parasitic inductance and maximize surge current handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V reverse stand-off (VRWM): ensures reliable operation up to nominal bus voltage without leakage or conduction. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave): maintains safe stress margin below 30V damage thresholds of USB PD controllers. |
| Peak Pulse Current | 40A (8/20μs): meets IEC 61000-4-5 Level 4 surge immunity for industrial and automotive-grade inputs. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2): eliminates need for secondary ESD stages in USB Type-C and IoT interface designs. |
| Dynamic Resistance | 20mΩ (measured 1–40A, 8/20μs): enables flat clamping response and minimizes voltage overshoot during fast-rising transients. |
| Junction Capacitance | 175pF at 22V/1MHz: low enough for DC power rail protection without affecting load switch or PMIC stability. |
Pinout & Package
1N6159AUS is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no solder mask defined). All six terminals must be connected - three GND pins for low-inductance return path, three IN pins for parallel surge current sharing - to achieve rated 40A performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | Ground | Low-inductance, parallel GND connection required to handle full 40A surge return current and stabilize clamping. |
| Pins 4, 5, 6 | Input / Protected Line | Parallel-connected anode-side terminals for direct placement at connector; all three must route to same protected node. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V from 24A to 40A - avoids overdesigning downstream ICs' voltage margins. |
| Temperature-stable protection | Clamping holds 27–28V from −40°C to +125°C - eliminates derating calculations for industrial ambient conditions. |
| Low dynamic resistance | 20mΩ RDYN reduces I×R drop during surge, enabling tighter voltage control than TVS diodes (typically >100mΩ). |
| High-energy EOS handling | 1120W peak pulse power rating supports repeated 1kV/42Ω surges per IEC 61000-4-5 without degradation. |
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 ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Primary EOS shunt device placed directly at connector, clamping transients before they reach PD controller or buck converter. Use Value: Maintains 27.5–28V clamping across full temperature range - prevents false OVP trips and ensures robust compliance with USB PD 3.1 voltage tolerance limits. |
Use Scenario: Safeguarding input of high-side load switches (e.g., HS2950P) in remote meters, robotics, and factory automation equipment. IC Role / Device Role / Timing Role: Front-end transient diverter that limits voltage stress on internal FET gate oxide and drain-source junction. Use Value: Clamps below 30V at 40A - keeps stress within safe operating area (SOA) of load switch FETs rated for 30V max VDS. |
| IoT Edge Node Power Rail Protection | Storage Device 22V Backup Supply Protection |
Use Scenario: Securing 22V auxiliary rails powering cellular modems, GNSS receivers, or sensor fusion units in battery-backed edge nodes. IC Role / Device Role / Timing Role: Single-component solution replacing multi-stage TVS+MOV networks, reducing BOM count and PCB area. Use Value: 1.6mm × 1.6mm footprint saves >60% board space vs. discrete TVS arrays while delivering superior clamping consistency. |
Use Scenario: Protecting 22V supercapacitor or LiFePO4 backup supplies in SSDs, NAS enclosures, and RAID controllers against hot-plug and EFT events. IC Role / Device Role / Timing Role: Fast-acting shunt that diverts energy away from sensitive charge management ICs during capacitor inrush or fault recovery. Use Value: 175pF capacitance introduces negligible impedance at DC/low-frequency backup paths - no impact on hold-up time or regulation. |
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 package; 1N6159AUS is Semtech's alternate ordering code for TDS2211P. | No functional difference; both qualified for USB PD, industrial, and IoT use cases per same datasheet Rev 2.5. | Select 1N6159AUS when sourcing through legacy distributor channels or legacy BOMs referencing this part number. |
| SMAJ22A | Standard unidirectional TVS diode; 35.1V min clamping at 12.3A (8/20μs); higher VC, higher RDYN, no temperature stability. | Limited to lower-energy surges; requires derating above 85°C; unsuitable for tight-margin 22V PD systems. | Use SMAJ22A only in cost-sensitive, non-USB-PD applications where clamping <30V is not mandatory and ambient stays <70°C. |
Compared with TDS2211P (identical function) and SMAJ22A (conventional TVS), the 1N6159AUS delivers consistent 27.5–28V clamping across 40A and −40°C to +125°C - enabling smaller voltage margins, eliminating thermal derating, and simplifying compliance testing for USB-C and industrial power rails.
Availability
1N6159AUS is available at Aetrix Electronics and suitable for USB Type-C power delivery interfaces, 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 1N6159AUS 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, signal integrity, and wireless infrastructure.
The 1N6159AUS belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 22V power rail protection where stable clamping, temperature independence, and high surge endurance are critical.
FAQ
What is the exact package type and dimensions of the 1N6159AUS?
The 1N6159AUS uses a 6-pin DFN package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad. Pin 1 is marked by a laser dot; Pins 1–3 are GND, Pins 4–6 are IN. All six terminals must be soldered to achieve full 40A surge rating per Semtech datasheet Rev 2.5.
How does the 1N6159AUS differ from standard TVS diodes like SMAJ22A in clamping behavior?
The 1N6159AUS uses a triggered FET architecture that maintains 27.5–28V clamping from 24A to 40A and −40°C to +125°C, whereas SMAJ22A exhibits rising clamping (≥35V at 12A) and significant thermal drift. This makes the 1N6159AUS suitable for tight-margin 22V systems like USB PD where consistent voltage limiting is essential.
Is the 1N6159AUS pin-compatible with TDS2211P?
Yes - the 1N6159AUS is Semtech's alternate orderable part number for the TDS2211P. Both share identical die, pinout, package, electrical specifications, and qualification data per Final Datasheet Rev 2.5. No PCB or schematic changes are needed when substituting between them.
What is the maximum continuous reverse working voltage for the 1N6159AUS?
The 1N6159AUS has a reverse stand-off voltage (VRWM) of 22V, meaning it reliably blocks up to 22V DC without conduction. This matches common USB PD VBus levels and ensures compatibility with 22V-rated load switches, PMICs, and protection ICs without leakage or premature triggering.
Can the 1N6159AUS protect high-speed data lines such as USB SuperSpeed or DisplayPort?
No - the 1N6159AUS has 175pF junction capacitance, making it unsuitable for data lines. It is designed exclusively for DC power rails and low-speed control lines. For USB SS/DP/DM lines, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF); the 1N6159AUS should only be used on VBus, CC, or SBU power paths.
1N6159AUS 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 38.8V (Max)
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 21.4A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
1N6159AUS FAQ
1.How can I place an order for 1N6159AUS through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6159AUS 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 1N6159AUS reliable?
The price and inventory of 1N6159AUS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6159AUS is usually 5 days.
3.What payment methods are accepted for 1N6159AUS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6159AUS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6159AUS?
1N6159AUS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6159AUS 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 1N6159AUS?
For technical support, including 1N6159AUS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6159AUS requirements.
6.How does Aetrix verify that 1N6159AUS is sourced from the original manufacturer or authorized distributors?
All 1N6159AUS 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 1N6159AUS meets industry standards.
7.What is the process for return or replacement of 1N6159AUS?
All 1N6159AUS units undergo pre-shipment inspection (PSI). If there is an issue with 1N6159AUS, 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 1N6159AUS part is unused and in its original packaging.
Return procedure for 1N6159AUS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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