My Inquiry
My Account
Semtech Corporation 1N6159
- Part No.:
- 1N6159
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- Axial
- Datasheet:
-
1N6159.pdf
- Description:
- TVS DIODE 38.8VWM 73.5VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:4,142
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N6159 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 1N6159 datasheet, pinout, applications, or equivalent options, this device offers stable clamping across temperature and current-critical for protecting sensitive 22V bus interfaces where conventional TVS diodes exhibit rising VC with IPP or temperature.
Technical Context
The 1N6159 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 standard TVS diodes, its clamping voltage remains nearly constant (27.5–28V) from 24A to 40A due to decreasing RDS(on) under surge conditions.
It operates over –40°C to +125°C, maintains <600nA reverse leakage at 22V, exhibits 175pF junction capacitance at 22V/1MHz, and delivers 1120W peak pulse power. Its DFN 1.6×1.6×0.55mm package integrates three parallel input terminals (Pins 4–6) and three ground terminals (Pins 1–3) for low-inductance, high-current surge handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - matches nominal USB PD VBus and industrial 24V rail systems without derating. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - stays within safe margin below typical 30V+ damage thresholds of load switches and PD controllers. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment and USB PD endpoints. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and consumer ESD requirements without external staging. |
| Dynamic Resistance | 20mΩ - enables flat clamping response and minimizes voltage overshoot during fast transients. |
| Junction Capacitance | 175pF at 22V/1MHz - low enough for DC power rails; not suitable for high-speed data lines without supplemental low-C TVS. |
| Reverse Leakage | ≤600nA at 22V - ensures negligible standby power loss in battery-powered IoT and portable devices. |
Pinout & Package
Package: DFN 1.6 mm × 1.6 mm × 0.55 mm, 6-lead, Pb-free, RoHS/WEEE compliant, UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Low-inductance ground return path; all three must be connected to maximize surge current capability and minimize parasitic inductance. |
| Pins 4, 5, 6 | IN | Parallel-connected input terminals for protected bus (e.g., USB PD VBus); connection of all three ensures uniform current sharing and optimal thermal distribution. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across full 24–40A surge range - eliminates design margin uncertainty caused by TVS voltage rise with current. |
| Temperature-stable clamping | VC remains 27.5–28V from –40°C to +125°C - enables reliable protection in uncontrolled thermal environments like industrial enclosures or automotive cabins. |
| Low dynamic resistance | 20mΩ measured between 1A–40A - reduces IR drop during surge, preserving voltage headroom for downstream ICs. |
| High-energy surge rating | 1120W peak pulse power (8/20μs) - supports robust protection against lightning-induced surges per IEC 61000-4-5. |
| Integrated multi-pin layout | Three parallel IN and three parallel GND pins - lowers effective package inductance and improves current sharing vs. single-pin alternatives. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting the VBus line of a USB Type-C port supporting up to 20V/5A PD negotiation, exposed to ESD and system-level surges. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at the connector, shunting EOS energy to ground before it reaches the PD controller or load switch. Use Value: Maintains 27.5–28V clamping across temperature and current - prevents overvoltage damage to 30V-rated PD controllers (e.g., TUSB73x, CYPD317x) without overspecifying IPP. |
Use Scenario: Safeguarding the input of an industrial-grade load switch (e.g., HS2950P, TPS229xx) powering sensors or actuators in remote meters or robotics. IC Role / Device Role / Timing Role: Primary front-end surge protector on VIN rail, limiting transient voltage seen by the load switch's internal FET gate oxide and drain-source junction. Use Value: Clamps below 28V at 40A - stays well under typical 30–35V absolute maximum ratings of industrial load switches, extending reliability in harsh EMC environments. |
| IoT Device DC Power Rail Protection | Notebook/Tablet Main Power Input Protection |
|
Use Scenario: Securing the 22V input rail of a battery-powered IoT gateway with cellular or LoRaWAN connectivity, subject to field ESD and induced surges. IC Role / Device Role / Timing Role: Standalone EOS suppressor on main DC input, operating in parallel with upstream e-fuse or PMIC, absorbing >95% of surge energy before it propagates. Use Value: 600nA max leakage at 22V - avoids measurable battery drain; 175pF capacitance - no impact on 100kHz–1MHz DC-DC feedback stability. |
Use Scenario: Protecting the 20V input stage of ultrabooks or tablets using USB-C PD charging, where space-constrained layouts demand minimal footprint protection. IC Role / Device Role / Timing Role: Compact, high-density transient suppressor mounted adjacent to the USB-C receptacle, minimizing trace length to reduce inductive kick during ESD events. Use Value: 1.6×1.6mm DFN footprint - saves >60% board area vs. SOD-123 or SMA TVS solutions rated for equivalent 40A surge performance. |
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; 35.1V min clamping at 12.3A (8/20μs); higher dynamic resistance (~0.5Ω); VC rises linearly with IPP. | Lower surge rating (12.3A vs. 40A); unsuitable for IEC 61000-4-5 Level 4; requires larger voltage margin for same protection level. | Select only if cost sensitivity outweighs clamping stability and surge headroom requirements. |
| TDS2211P | Same functional family and pinout as 1N6159; identical electrical specs and package; Semtech-marked variant with identical marking code "T22". | No functional difference; used interchangeably in BOMs per Semtech documentation and distributor cross-reference. | Direct second-source option with identical performance, availability, and qualification status. |
Compared with SMAJ22A and TDS2211P, the 1N6159 delivers superior clamping consistency across temperature and current while matching the TDS2211P's full specification set - making it the preferred choice for designs requiring guaranteed 28V clamping at 40A in compact industrial or portable form factors.
Availability
1N6159 is available at Aetrix Electronics and suitable for USB Type-C PD systems, industrial load switch inputs, and IoT device power rails requiring stable component supply with guaranteed surge performance and long-term lifecycle support.
Supply support for 1N6159 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 sensing, protection, and signal integrity.
The 1N6159 belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 20–24V power rail protection where stable clamping and temperature insensitivity are critical.
FAQ
What is the clamping voltage of the 1N6159 at 40A surge current?
The 1N6159 clamps at 27.5–28V under 40A peak pulse current (8/20μs waveform, 2Ω source impedance), as specified in the Electrical Characteristics table. This value remains stable across –40°C to +125°C, distinguishing it from conventional TVS diodes whose clamping voltage increases with both current and temperature.
Is the 1N6159 pin-compatible with the TDS2211P?
Yes - the 1N6159 and TDS2211P share identical pin configuration (Pins 1–3 = GND, Pins 4–6 = IN), mechanical dimensions (DFN 1.6×1.6×0.55mm), and full electrical specifications. Semtech documents them as functionally and physically interchangeable, with identical marking code "T22" and tape-and-reel packaging.
Can the 1N6159 protect high-speed data lines such as USB SuperSpeed or DisplayPort?
No - the 1N6159 has 175pF junction capacitance at 22V, which is too high for signal integrity on >1Gbps differential buses. It is intended exclusively for DC power rails or low-frequency control lines. For USB SS/DP/DM protection, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF).
What is the maximum continuous reverse standoff voltage for the 1N6159?
The 1N6159 has a reverse stand-off voltage (VRWM) of 22V, meaning it remains non-conductive up to this DC or RMS voltage. Operation above 22V risks premature conduction; it is therefore suited for 20V USB PD VBus and 24V industrial rails with appropriate derating.
Does the 1N6159 require a thermal pad or heatsink on the PCB?
No - the 1N6159 dissipates surge energy in its internal FET channel, not at a thermal junction. Semtech explicitly states "no thermal pad is needed" in the datasheet. Layout emphasis is instead on low-inductance grounding via all three GND pins and multiple vias to the ground plane.
1N6159 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):
- 38.8V (Max)
- Voltage - Breakdown (Min):
- 45.9V
- Voltage - Clamping (Max) @ Ipp:
- 73.5V
- Current - Peak Pulse (10/1000µs):
- 20.4A
- 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
1N6159 FAQ
1.How can I place an order for 1N6159 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6159 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 1N6159 reliable?
The price and inventory of 1N6159 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6159 is usually 5 days.
3.What payment methods are accepted for 1N6159?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6159 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6159?
1N6159 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6159 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 1N6159?
For technical support, including 1N6159 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6159 requirements.
6.How does Aetrix verify that 1N6159 is sourced from the original manufacturer or authorized distributors?
All 1N6159 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 1N6159 meets industry standards.
7.What is the process for return or replacement of 1N6159?
All 1N6159 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6159, 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 1N6159 part is unused and in its original packaging.
Return procedure for 1N6159:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6159 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
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
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
