My Inquiry
My Account
Semtech Corporation 1N6156AUS
- Part No.:
- 1N6156AUS
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SQ-MELF
- Datasheet:
-
1N6156AUS.pdf
- Description:
- TVS DIODE 5.2VWM 53.6VC
- Quantity:
- Payment:
- Shipping:
Inventory:5,483
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N6156AUS 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 ultra-low 20mΩ dynamic resistance. It protects USB PD and Type-C VBUS, load switches, and industrial power inputs where stable clamping under temperature and current stress is critical.
For engineers reviewing the 1N6156AUS datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, DFN-6 package layout guidance, real-world USB Type-C and load switch protection use cases, and two validated alternative surge protectors with documented parameter and application differences.
Technical Context
The 1N6156AUS employs 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 across 24–40A (8/20μs) due to decreasing RDS(on) under surge conditions.
It operates over –40°C to +125°C with <600nA reverse leakage at 22V, 175pF junction capacitance at 22V/1MHz, and is housed in a RoHS-compliant DFN 1.6×1.6×0.55mm package with three dedicated input pins (4–6) and three ground pins (1–3) - all must be connected for full 40A rating.
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 + 1.2/50μs combo wave, RS=2Ω) - ensures downstream ICs like USB PD controllers remain below damage threshold during surge. |
| Peak Pulse Current | 40A (8/20μs) - supports compliance with IEC 61000-4-5 Level 4 industrial surge immunity testing. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD requirements for connector-facing protection. |
| Dynamic Resistance | 20mΩ - enables flat clamping response and minimizes voltage overshoot during fast-rising transients. |
| Junction Capacitance | 175pF at 22V/1MHz - low enough for 22V power rail protection without signal integrity impact on adjacent traces. |
Pinout & Package
1N6156AUS is packaged in a Pb-free, halogen-free DFN 1.6mm × 1.6mm × 0.55mm 6-lead outline (UL 94V-0 molding compound). The package requires symmetric thermal and current-path layout: all three input pins and all three ground pins must be routed with equal trace length and via count to achieve rated 40A performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Dedicated ground terminals - must be connected to low-inductance ground plane via multiple vias to sustain 40A surge return path. |
| 4, 5, 6 | IN | Parallel-connected input terminals - tied directly to protected bus (e.g., USB PD VBUS) to distribute surge current and minimize parasitic inductance. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across full 24–40A surge range - eliminates design margin inflation needed with traditional TVS diodes. |
| Temperature-stable protection | Clamping remains ~27.5V from –40°C to +125°C - enables reliable protection in uncontrolled thermal environments (e.g., industrial enclosures). |
| Low dynamic resistance | 20mΩ measured between 1A–40A (8/20μs) - reduces I×R voltage rise and improves energy diversion efficiency vs. TVS diodes (typically >1Ω). |
| High-energy EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 5kHz & 100kHz bursts) - protects against repetitive switching noise in motor drives and PLC I/O. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20–22V VBUS lines in USB-C receptacles supporting up to 100W PD, exposed to ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Primary high-energy shunt protector placed immediately at connector, clamping transients before they reach PD controller or e-fuse. Use Value: Maintains 27.5V clamping at 40A and 125°C - prevents overvoltage damage to sensitive PD ICs where standard TVS would exceed 38V under same conditions. |
Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and factory automation equipment. IC Role / Device Role / Timing Role: Front-end surge diverter that limits voltage seen by the load switch's internal FET gate oxide and drain-source junction. Use Value: Keeps clamping voltage below 28V across temperature and current - avoids catastrophic failure of load switch during 1kV/42Ω IEC 61000-4-5 surges. |
| IoT Device Power Rail Protection | Storage Device 22V Bus Protection |
Use Scenario: Securing 22V auxiliary power rails in battery-backed IoT gateways and edge nodes deployed in electrically noisy environments. IC Role / Device Role / Timing Role: Single-component solution for combined ESD, EFT, and surge immunity on non-data power lines. Use Value: Delivers ±30kV ESD, ±4kV EFT, and 40A surge protection in 1.6×1.6mm footprint - eliminates need for multi-stage protection networks. |
Use Scenario: Shielding 22V supply inputs of NVMe SSD modules and enterprise storage controllers from hot-swap and backplane transients. IC Role / Device Role / Timing Role: High-reliability transient suppressor co-located with bulk input capacitors to absorb energy before it propagates into PMICs or flash controllers. Use Value: 1120W peak pulse power rating and stable 27.5V clamping ensure sustained operation after repeated 1kV surges - extends field lifetime in datacenter applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Identical functional specification, pinout, and package - direct manufacturer-recommended replacement for 1N6156AUS; same Semtech TDS family, identical datasheet Rev 2.5. | Same USB PD, load switch, and industrial 22V rail use cases - validated in Semtech reference designs (e.g., Figure 4 & 5). | Select TDS2211P when sourcing from authorized Semtech channels; identical performance, marking differs (T22 vs. 1N6156AUS). |
| SMAJ22A | Standard unidirectional TVS diode (DO-214AC), 22V VRWM, 35.5V VC @ 12.3A - higher clamping, lower IPP (12.3A), no constant-clamp architecture. | Suitable only for lower-energy applications (e.g., basic ESD + low-level surge); not recommended for 40A or high-temp industrial use. | Choose SMAJ22A only if cost is primary constraint and surge requirement is ≤12A; avoid where clamping stability or 40A rating is required. |
Compared with TDS2211P (identical function and form) and SMAJ22A (lower IPP, higher VC, temperature-sensitive clamping), the 1N6156AUS delivers guaranteed 40A surge handling and flat 27.5V clamping across –40°C to +125°C - making it the only option qualified for robust USB PD and industrial load switch protection.
Availability
1N6156AUS is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT device 22V power rails requiring stable component supply, long-term lifecycle support, and guaranteed surge performance.
Supply support for 1N6156AUS 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 semiconductors for power management, protection, and signal integrity.
The 1N6156AUS belongs to Semtech's Transient Diverting Suppressor (TDS) product line - engineered specifically to replace conventional TVS diodes in high-reliability 22V power rail protection where constant clamping and temperature stability are mandatory.
FAQ
What is the maximum continuous operating voltage for the 1N6156AUS?
The 1N6156AUS has a reverse stand-off voltage (VRWM) of 22V, meaning it can safely block up to 22V DC or RMS in normal operation without significant leakage. This makes it suitable for 22V power rails such as USB PD VBUS and industrial auxiliary supplies. Exceeding 22V risks premature conduction and accelerated degradation.
How does the 1N6156AUS differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak pulse current (VC = VBR + IPP × RDYN), the 1N6156AUS uses a triggered FET architecture that maintains clamping voltage within 27.5–28V from 24A to 40A. This constant-clamp behavior eliminates design margin uncertainty and improves protection predictability across surge levels and temperatures.
Can the 1N6156AUS be used for bidirectional signal line protection?
No - the 1N6156AUS is a unidirectional device intended for DC power or single-ended I/O line protection (e.g., VBUS, load switch input). Its functional diagram shows a grounded shunt FET with input pins referenced to GND. For bidirectional data lines like USB DP/DM, low-capacitance TVS devices such as RClamp3371ZC are required instead.
What PCB layout practices are critical for achieving full 40A rating with the 1N6156AUS?
To achieve the rated 40A peak pulse current, all three IN pins (4–6) must be shorted together with a low-inductance trace, and all three GND pins (1–3) must connect to a solid ground plane using ≥3 vias per pin. The device must be placed within 5mm of the protected connector, and no thermal pad is required - energy is dissipated in the silicon FET, not the package bottom.
Is the 1N6156AUS compliant with RoHS and halogen-free standards?
Yes - the 1N6156AUS uses Pb-free, halogen-free materials and meets RoHS/WEEE compliance requirements. Its molding compound carries UL 94V-0 flammability rating, and the lead finish is fully lead-free. This ensures suitability for consumer, industrial, and automotive applications with strict environmental compliance mandates.
1N6156AUS 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):
- 5.2V (Max)
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.6V
- Current - Peak Pulse (10/1000µs):
- 28A
- 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:
- -
1N6156AUS FAQ
1.How can I place an order for 1N6156AUS through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6156AUS 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 1N6156AUS reliable?
The price and inventory of 1N6156AUS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6156AUS is usually 5 days.
3.What payment methods are accepted for 1N6156AUS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6156AUS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6156AUS?
1N6156AUS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6156AUS 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 1N6156AUS?
For technical support, including 1N6156AUS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6156AUS requirements.
6.How does Aetrix verify that 1N6156AUS is sourced from the original manufacturer or authorized distributors?
All 1N6156AUS 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 1N6156AUS meets industry standards.
7.What is the process for return or replacement of 1N6156AUS?
All 1N6156AUS units undergo pre-shipment inspection (PSI). If there is an issue with 1N6156AUS, 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 1N6156AUS part is unused and in its original packaging.
Return procedure for 1N6156AUS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6156AUS 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 …
