My Inquiry
My Account
Semtech Corporation 1N6125
- Part No.:
- 1N6125
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- Axial
- Datasheet:
-
1N6125.pdf
- Description:
- TVS DIODE 47.1VWM 89.3VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:6,373
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N6125 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, Type-C VBus, and load switch inputs in industrial and portable electronics.
For engineers reviewing the 1N6125 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low dynamic resistance, DFN-6 package layout constraints, and compatibility with 22V working voltage systems requiring robust surge immunity per IEC 61000-4-5.
Technical Context
The 1N6125 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 conditions.
It operates with three input terminals (Pins 4–6) tied together to the protected line and three ground terminals (Pins 1–3) connected to system ground, requiring all six pins to be soldered for full 40A rating. Its 175pF junction capacitance at 22V and 1MHz suits moderate-speed power-line protection but excludes high-frequency data-line use.
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) - ensures downstream 24V-rated ICs (e.g., USB PD controllers) remain below damage threshold during surge. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 (±1kV, RS = 42Ω) for industrial equipment and USB PD input stages. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds standard requirements for handheld and connector-exposed devices. |
| Dynamic Resistance | 20mΩ - enables flat clamping response and minimizes voltage rise under increasing surge current. |
| Junction Capacitance | 175pF at 22V, 1MHz - suitable for power/bus protection; too high for USB SS, DP/DM, or high-speed signal lines. |
| Operating Temp | −40°C to +125°C - supports deployment in automotive cabin, industrial control, and outdoor IoT environments. |
Pinout & Package
1N6125 is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad not required (energy dissipated in silicon). All six terminals must be connected: Pins 1–3 are dedicated ground terminals; Pins 4–6 are parallel-connected input terminals for the protected line.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | Ground (GND) | Low-inductance return path for surge current; all three must be connected to solid ground plane via multiple vias for rated 40A performance. |
| Pins 4, 5, 6 | Input (IN) | Parallel-connected surge input node; ties directly to protected bus (e.g., USB PD VBus); all three required for full current handling and thermal sharing. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across 24–40A and −40°C to +125°C - eliminates derating uncertainty in thermal or high-current designs. |
| FET-based shunt topology | Replaces PN-junction TVS with active switching; avoids junction heating limitations and enables higher energy absorption per unit area. |
| Low dynamic resistance | 20mΩ measured between 1A–40A - reduces IR drop during surge, maintaining tighter voltage control than TVS diodes (RDYN > 0.5Ω typical). |
| DFN-6 footprint | 1.6mm × 1.6mm area - saves >50% board space vs. SOD-123 or SMA packages while supporting automated assembly and reflow. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz bursts) - protects against repetitive fast transients in motor drives and PLC I/O modules. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting the 20–22V VBus line in USB Type-C ports supporting up to 100W PD, exposed to ESD at connectors and lightning-induced surges on long cables. IC Role / Device Role / Timing Role: Transient diverting suppressor placed immediately after the Type-C receptacle, clamping overvoltage before it reaches the PD controller and load switch. Use Value: Maintains 27.5–28V clamping across temperature and current-prevents false OVP trips and ensures reliable operation where traditional TVS would exceed 35V at 125°C. |
Use Scenario: Safeguarding the input of high-side load switches (e.g., HS2950P) in remote meters, robotics, and factory automation systems subject to 40A surge events. IC Role / Device Role / Timing Role: Primary front-end surge clamp on VIN rail, limiting voltage seen by the load switch's internal MOSFET gate oxide and drain-source junction. Use Value: Clamps below 28V at 40A-keeps stress within safe operating area (SOA) of integrated FETs, avoiding catastrophic failure during 8/20μs surges. |
| IoT Device Power Input Protection | Storage Device 22V Rail Protection |
Use Scenario: Securing the main 22V input of battery-backed smart sensors or edge gateways deployed in uncontrolled environments with frequent ESD and conducted surges. IC Role / Device Role / Timing Role: Single-component, low-profile solution replacing multi-device TVS+MOV stacks on compact PCBs with limited real estate. Use Value: Delivers 40A surge rating in 2.56mm² footprint-enables robust protection without sacrificing size or requiring thermal relief pads. |
Use Scenario: Protecting 22V auxiliary rails in NVMe SSD enclosures or enterprise storage backplanes exposed to hot-plug transients and system-level ESD. IC Role / Device Role / Timing Role: Standalone EOS protector on auxiliary power distribution network, coordinated with low-capacitance TVS on data lanes. Use Value: Stable 27.5–28V clamping ensures no voltage overshoot breaches 24V-rated PMICs or buffer ICs downstream of the rail. |
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 VRWM, 35.5V VC @ 12.3A; RDYN ≈ 0.8Ω; 100pF capacitance. | Higher clamping (≥35.5V) and strong temperature dependence-unsuitable for 24V systems near thermal limits. | Select only if cost sensitivity outweighs clamping precision and thermal stability requirements. |
| TDS2211P | Same manufacturer, identical function and specs-but different marking and reel packaging; electrically and mechanically identical to 1N6125. | No functional difference; used interchangeably in Semtech documentation and design guides. | Valid second-source part with identical performance-no redesign or validation needed. |
Compared with SMAJ22A, 1N6125 delivers 7–8V lower clamping at rated current and stable performance across temperature, enabling safer margin for 24V ICs; versus TDS2211P, it is a direct form-fit-function match with no electrical or mechanical distinction.
Availability
1N6125 is available at Aetrix Electronics and suitable for USB Type-C power delivery interfaces, industrial load switch inputs, and IoT device power rails requiring stable component supply, high-reliability surge immunity, and compact DFN packaging.
Supply support for 1N6125 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 signal integrity.
The 1N6125 belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-energy EOS applications where clamping stability, low dynamic resistance, and thermal resilience are critical.
FAQ
What is the maximum continuous operating voltage for the 1N6125?
The 1N6125 has a reverse stand-off voltage (VRWM) of 22V, meaning it can continuously block up to 22V DC or RMS without significant leakage. Operation above this voltage risks premature conduction and accelerated degradation. The 1N6125 is therefore suited for 22V nominal power rails such as USB PD VBus and industrial 24V auxiliary supplies.
Does the 1N6125 require a thermal pad on the PCB?
No, the 1N6125 does not require an exposed thermal pad. Its DFN-6 package dissipates surge energy internally via the silicon FET structure-not through junction-to-board conduction. Layout guidelines emphasize low-inductance grounding (multiple vias to solid ground plane) rather than thermal copper, as confirmed in Semtech's datasheet Figure 7 and Application Information section.
Can the 1N6125 be used on high-speed data lines like USB SuperSpeed or PCIe?
No, the 1N6125 is not suitable for high-speed data lines. With 175pF junction capacitance at 22V, it introduces excessive signal loading and insertion loss on differential pairs operating above ~100MHz. For USB SS, DP/DM, or PCIe lanes, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF), as specified in the TDS2211P application note.
How does the clamping behavior of the 1N6125 differ from a standard TVS diode?
Unlike standard TVS diodes-whose clamping voltage rises linearly with peak current (VC = VBR + IPP × RDYN)-the 1N6125 maintains nearly constant clamping (27.5–28V) from 24A to 40A due to its FET-based shunt architecture and decreasing RDS(on). This eliminates current-dependent voltage overshoot and improves predictability in surge-critical designs.
Is the 1N6125 pin-compatible with other Semtech TDS devices like TDS2211P?
Yes-the 1N6125 is electrically and mechanically identical to TDS2211P, sharing the same DFN-6 package, pin configuration (Pins 1–3 = GND, Pins 4–6 = IN), absolute maximum ratings, and electrical characteristics. Semtech lists them as interchangeable in ordering information and application schematics, with no PCB or firmware changes required.
1N6125 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):
- 47.1V (Max)
- Voltage - Breakdown (Min):
- 55.8V
- Voltage - Clamping (Max) @ Ipp:
- 89.3V
- Current - Peak Pulse (10/1000µs):
- 5.6A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
1N6125 FAQ
1.How can I place an order for 1N6125 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6125 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 1N6125 reliable?
The price and inventory of 1N6125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6125 is usually 5 days.
3.What payment methods are accepted for 1N6125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6125?
1N6125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6125 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 1N6125?
For technical support, including 1N6125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6125 requirements.
6.How does Aetrix verify that 1N6125 is sourced from the original manufacturer or authorized distributors?
All 1N6125 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 1N6125 meets industry standards.
7.What is the process for return or replacement of 1N6125?
All 1N6125 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6125, 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 1N6125 part is unused and in its original packaging.
Return procedure for 1N6125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6125 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 …
