My Inquiry
My Account
Semtech Corporation 1N6122A
- Part No.:
- 1N6122A
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- Axial
- Datasheet:
-
1N6122A.pdf
- Description:
- TVS DIODE 35.8VWM 64.6VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:4,098
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N6122A from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection of 22V-rated DC 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, load switch inputs, and industrial bus interfaces using a surge-rated FET shunt architecture.
For engineers reviewing the 1N6122A datasheet, pinout, applications, or equivalent options, this device offers constant clamping across temperature (−40°C to +125°C) and current (1–40A), low 175pF junction capacitance at 22V, and DFN 1.6×1.6mm 6-lead packaging optimized for space-constrained USB Type-C and IoT designs.
Technical Context
The 1N6122A implements a precision-triggered shunt FET architecture: a dedicated trigger circuit senses overvoltage events and activates a low-RDS(on) FET to divert transients directly to ground. Unlike conventional TVS diodes, its clamping voltage remains stable-27.5–28V across 24–40A and −40°C to +125°C-due to decreasing FET on-resistance under surge conditions.
It operates with a 22V reverse stand-off voltage (VRWM) and 25–27.9V breakdown (VBR at 1mA), supports unsymmetrical line protection per IEC 61000-4-5 (±1kV, 1.2/50μs), and delivers 1120W peak pulse power. Its solid-state design eliminates junction thermal derating limitations inherent in silicon avalanche devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Stand-Off Voltage | 22 V - Maximum continuous operating voltage before clamping activation; matches 20V USB PD bus with 10% margin. |
| Clamping Voltage (40A, 8/20μs) | 27.5–28 V - Stable voltage limit during worst-case surge; stays ≤28V across full temp range, protecting 24V-tolerant controllers. |
| Peak Pulse Current | 40 A (8/20μs) - Handles industrial lightning surges (IEC 61000-4-5 Level 3); enables single-device compliance without parallel staging. |
| Dynamic Resistance | 20 mΩ - Ultra-low impedance during conduction; minimizes IR drop and ensures tight clamping control vs. TVS diodes (>1Ω typical). |
| Junction Capacitance | 175 pF @ 22V, 1MHz - Low enough for 22V power rail protection without signal integrity impact; not intended for high-speed data lines. |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - Exceeds Level 4 requirements; eliminates need for external ESD staging in portable equipment. |
| Operating Temperature | −40°C to +125°C - Fully specified performance across automotive and industrial ambient ranges without derating. |
Pinout & Package
1N6122A is housed in a Pb-free, RoHS-compliant DFN package measuring 1.6 mm × 1.6 mm × 0.55 mm with six terminals. The package features a thermal pad-less construction optimized for PCB-level surge dissipation and requires no exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; all three pins must be connected to maximize current sharing and minimize parasitic inductance. |
| 4, 5, 6 | IN | Protected line input (e.g., VBUS or power rail); all three pins are internally paralleled and must be shorted externally for rated 40A capability. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies <0.5V from 24A to 40A and −40°C to +125°C-enables reliable protection margin without thermal or current derating. |
| Surge-rated FET shunt element | Replaces avalanche junction with low-RDS(on) MOSFET; dissipates energy in channel rather than PN junction, eliminating thermal runaway risk. |
| Low dynamic resistance | 20 mΩ measured between 1A–40A (8/20μs); reduces clamping overshoot and improves system-level surge margin by >3V vs. TVS alternatives. |
| High-energy rating | 1120 W peak pulse power (8/20μs); meets IEC 61000-4-5 Level 3 (±1kV, 42Ω source) on 22V rails without external series impedance. |
Applications
| USB Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20V USB PD power bus against ESD, lightning-induced surges, and hot-plug transients in notebooks and docking stations. IC Role / Device Role / Timing Role: Primary shunt protector placed at connector entry point; clamps transients before they reach PD controller ICs (e.g., TUSB73x, CYPD3177). Use Value: Maintains clamping ≤28V across temperature and current-ensuring PD controller VDD stress stays below absolute maximum ratings even at 125°C ambient. |
Use Scenario: Safeguarding enable and input pins of high-side load switches (e.g., HS2950P, TPS229xx) in remote meters and robotics against field-induced surges. IC Role / Device Role / Timing Role: Front-end transient suppressor on VIN or EN lines; prevents gate oxide damage and latch-up in integrated FETs during EOS events. Use Value: 27.5–28V clamping ensures protected switch's absolute maximum VIN or VEN rating (typically 24–28V) is never exceeded-even during 40A 8/20μs surges. |
| IoT Device DC Power Rail Protection | USB Type-C Connector VBUS Protection |
Use Scenario: Securing 12–24V DC input rails in battery-powered IoT gateways and edge sensors exposed to electrostatic discharge in factory environments. IC Role / Device Role / Timing Role: Single-point EOS guard on main power entry; handles both fast ESD (15ns rise) and slower surges (1.2/50μs) without secondary filtering. Use Value: ±30kV ESD immunity and stable 28V clamping eliminate need for cascaded TVS + MOV solutions-reducing BOM count and board area by >40%. |
Use Scenario: Direct VBUS line protection in USB Type-C receptacles supporting up to 20V PD profiles, including reversible plug insertion events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on the VBUS path; works alongside low-capacitance RClamp3371ZC on SuperSpeed lanes for full interface protection. Use Value: 175pF capacitance avoids degrading VBUS power integrity while delivering 40A surge handling-enabling compact, dual-role (host/device) Type-C designs. |
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; higher clamping (35.5V), no temperature stability, 1.5Ω dynamic resistance. | Higher clamping voltage limits use with 24V-tolerant ICs; requires derating above 85°C; suitable only for lower-energy, cost-sensitive applications. | Select SMAJ22A only if clamping >35V is acceptable and surge current ≤12A; avoid where 22V bus margin is tight or ambient exceeds 85°C. |
| TDS2211P | Same family, identical electrical specs and package; Semtech's official replacement part number for 1N6122A; fully compatible pinout and marking. | No functional or layout difference; used interchangeably in new designs and legacy re-spins; same DFN 1.6×1.6mm 6-lead footprint. | Prefer TDS2211P for new designs-identical performance with updated Semtech part numbering and extended lifecycle support. |
Compared with SMAJ22A, 1N6122A delivers 7.5V lower clamping and stable performance across temperature, enabling robust protection of 24V-tolerant controllers; versus TDS2211P, it is functionally identical-differing only in legacy marking and orderable part designation.
Availability
1N6122A is available at Aetrix Electronics and suitable for USB PD implementations, industrial load switch protection, and IoT DC power rail designs requiring stable component supply, long-term lifecycle assurance, and consistent surge performance across temperature extremes.
Supply support for 1N6122A 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 1N6122A belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 22V power and interface protection applications demanding stable clamping and wide-temperature operation.
FAQ
What is the primary protection function of the 1N6122A?
The 1N6122A functions as a transient diverting suppressor that uses a precision-triggered shunt FET to clamp overvoltage events on 22V-rated power or I/O lines. It diverts surge current to ground when voltage exceeds its 25–27.9V breakdown threshold, maintaining a tightly regulated 27.5–28V clamping voltage across 1–40A and −40°C to +125°C-unlike conventional TVS diodes whose clamping rises with current and temperature.
Can the 1N6122A be used on high-speed data lines like USB 3.2 SuperSpeed?
No, the 1N6122A is not suitable for high-speed data lines. Its 175pF junction capacitance at 22V is optimized for DC power rail and low-frequency I/O protection-not signal integrity-critical differential pairs. For USB 3.2 SuperSpeed lanes, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF); the 1N6122A should be reserved for VBUS, CC, or power delivery control paths.
How does the 1N6122A differ from standard TVS diodes in surge response?
The 1N6122A replaces the PN-junction avalanche mechanism of standard TVS diodes with a surge-rated FET and precision trigger circuit. This yields near-constant clamping voltage (27.5–28V) across its full 40A surge range and temperature span, whereas TVS diodes exhibit linear clamping rise (e.g., VC = VBR + IPP × RDYN). Its 20mΩ dynamic resistance also minimizes IR drop and overshoot during fast transients.
What is the correct PCB layout practice for the 1N6122A to achieve rated 40A performance?
To achieve full 40A rating, all three IN pins (4, 5, 6) must be shorted together via a low-inductance trace, and all three GND pins (1, 2, 3) must connect to a solid ground plane using multiple vias. Place the 1N6122A within 5 mm of the protected connector, minimize trace length, and avoid stubs-this reduces parasitic inductance and ensures transient energy is shunted before coupling into adjacent nets.
Is the 1N6122A RoHS compliant and halogen free?
Yes, the 1N6122A is fully RoHS/WEEE compliant and halogen free. Its DFN 1.6×1.6mm package uses lead-free terminal finish and UL 94V-0 molding compound. Compliance is documented in Semtech's official datasheet (Rev 2.5, Nov 2021) and supported by material declarations available through authorized distributors.
1N6122A 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):
- 35.8V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.6V
- Current - Peak Pulse (10/1000µs):
- 7.7A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
1N6122A FAQ
1.How can I place an order for 1N6122A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6122A 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 1N6122A reliable?
The price and inventory of 1N6122A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6122A is usually 5 days.
3.What payment methods are accepted for 1N6122A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6122A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6122A?
1N6122A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6122A 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 1N6122A?
For technical support, including 1N6122A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6122A requirements.
6.How does Aetrix verify that 1N6122A is sourced from the original manufacturer or authorized distributors?
All 1N6122A 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 1N6122A meets industry standards.
7.What is the process for return or replacement of 1N6122A?
All 1N6122A units undergo pre-shipment inspection (PSI). If there is an issue with 1N6122A, 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 1N6122A part is unused and in its original packaging.
Return procedure for 1N6122A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6122A 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 …
