My Inquiry
My Account
Semtech Corporation JANTX1N6121US
- Part No.:
- JANTX1N6121US
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SQ-MELF
- Datasheet:
-
JANTX1N6121US.pdf
- Description:
- TVS BI 500W 38.7V SM
- Quantity:
- Payment:
- Shipping:
Inventory:3,316
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
JANTX1N6121US from Microsemi (now Microchip) is a military-grade transient voltage suppression diode designed for high-reliability EOS/ESD protection of 22V DC power and signal lines. It delivers ±30kV IEC 61000-4-2 ESD immunity, clamps at 27.5–28V under 40A 8/20μs surges, and maintains stable clamping across –55°C to +150°C junction temperature. Used in avionics power bus protection where MIL-PRF-19500/560 qualification is required.
For engineers reviewing the JANTX1N6121US datasheet, pinout, applications, or equivalent options, this page provides verified military-spec parameters, DFN-6 package layout guidance, clamping stability data across temperature and current, and direct alternatives qualified for aerospace and defense systems.
Technical Context
JANTX1N6121US implements a solid-state transient diverting architecture using a surge-rated FET as the primary shunt element, activated by a precision trigger circuit - not a conventional PN-junction TVS. This enables near-constant clamping voltage (27.5–28V) over 24–40A peak pulse current and –40°C to +125°C operating range.
Unlike standard TVS diodes whose VC = VBR + IPP × RDYN causes linear clamping rise with current, JANTX1N6121US achieves <20mΩ dynamic resistance and <175pF junction capacitance at 22V, enabling robust protection of USB PD, load switch inputs, and industrial 24V buses without signal integrity degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VRWM) | 22V - Maximum continuous DC bus voltage before leakage exceeds 600nA; sets upper limit for protected 24V industrial or USB PD systems. |
| Clamping Voltage (VC) | 27.5–28V at 40A 8/20μs - Limits transient overshoot to safe margin below 30V-rated downstream ICs like USB PD controllers or e-fuses. |
| Peak Pulse Current (IPP) | 40A (8/20μs) - Withstands Level 4 IEC 61000-4-5 surges (±1kV, RS=42Ω) and lightning-induced transients in outdoor equipment. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - Eliminates need for secondary ESD stages on exposed connectors in ruggedized IoT or avionics interfaces. |
| Junction Capacitance (CJ) | 175pF at 22V, 1MHz - Low enough to avoid signal distortion on 100Mbps+ power delivery control lines (CC/SBU), unlike higher-capacitance TVS arrays. |
| Dynamic Resistance (RDYN) | 20mΩ - Enables flat clamping curve; ensures VC remains stable even as IPP rises from 1A to 40A, critical for consistent protection margin. |
| Operating Temperature | –40°C to +125°C - Fully specified performance across extended industrial and aerospace thermal environments without derating. |
Pinout & Package
Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, RoHS-compliant, UL 94V-0 molding compound, lead-free finish. Thermal pad not required - energy dissipated in silicon FET channel.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path for surge current; all three must be connected via low-inductance vias to maximize 40A handling capability. |
| Pins 4, 5, 6 | IN | Protected line input - tied together to single trace from connector; enables parallel conduction path for lowest possible impedance during EOS events. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based shunt architecture | Replaces traditional TVS diodes with active switching; eliminates VBR-dependent clamping drift and enables constant VC across full IPP range. |
| Stable clamping vs. temperature | Clamping voltage varies <0.5V from –40°C to +125°C - avoids thermal runaway risk in sealed enclosures or high-ambient industrial settings. |
| Low dynamic resistance | 20mΩ measured between 1A–40A (8/20μs) - reduces IR drop during surge, preserving protection margin under worst-case current conditions. |
| High-energy surge rating | 1120W peak pulse power (8/20μs) - supports compliance with IEC 61000-4-5 Level 4 and MIL-STD-461G CS115 without external series impedance. |
| Compact DFN footprint | 1.6mm × 1.6mm area - saves >60% board space versus SO-8 or SMC TVS solutions while maintaining identical surge capability. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting VBUS lines in USB-C ports supporting up to 20V/5A PD negotiation, exposed to ESD from hot-plug events and conducted surges from shared power rails. IC Role / Device Role / Timing Role: Primary EOS suppressor placed directly at connector, clamping transients before they reach USB PD controller (e.g., FUSB302) or buck-boost ICs. Use Value: Maintains 27.5V clamping at 40A and 125°C - prevents latch-up or gate oxide damage in PD controllers rated for ≤30V absolute maximum, unlike TVS diodes that exceed 35V at elevated temperature. |
Use Scenario: Safeguarding enable and input pins of high-side load switches (e.g., HS2950P) in remote meters, robotics, and factory automation where 24V supply lines are subject to lightning-induced surges. IC Role / Device Role / Timing Role: Front-end transient shunt that limits voltage seen by the load switch's internal MOSFET gate driver and overvoltage protection circuitry. Use Value: Clamps at 28V max under 40A surge - stays below typical 32V gate-source breakdown of industrial load switches, preventing catastrophic failure during field-deployed surge events. |
| Aerospace Avionics Power Bus Protection | IoT Edge Device DC Input Protection |
|
Use Scenario: Hardening 28V DC distribution networks in UAV flight controllers and satellite subsystems against ESD from handling, static discharge, and induced transients during launch vibration. IC Role / Device Role / Timing Role: MIL-PRF-19500/560-qualified transient suppressor integrated into power entry module, meeting DO-160 Section 22 lightning-induced transient requirements. Use Value: Qualified to –55°C to +150°C junction temperature with ±30kV ESD rating - satisfies Class C environmental testing for airborne electronics without derating or redundancy. |
Use Scenario: Securing 12–24V DC inputs of battery-powered smart sensors and gateways deployed in uncontrolled environments (e.g., agricultural telemetry, building HVAC nodes). IC Role / Device Role / Timing Role: Single-component solution replacing multi-stage TVS + MOV designs, reducing BOM count and PCB area in space-constrained edge nodes. Use Value: Delivers 40A surge handling and 175pF capacitance in 1.6mm² - enables reliable operation in dusty, humid, or ESD-prone locations while preserving signal integrity on auxiliary monitoring lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P (Semtech) | Commercial-grade DFN-6, same 22V VRWM and 28V clamping, but rated only to +125°C (vs. JANTX1N6121US' +150°C) and lacks MIL-PRF-19500 qualification. | Approved for industrial USB-C and IoT, not certified for aerospace or military platforms requiring QML-V or MIL-STD-883 screening. | Select when cost, lead time, or commercial qualification suffices - identical electrical performance in non-military use cases. |
| SMAJ22A (Littelfuse) | Standard unidirectional TVS diode in SMA package; 22V VRWM, 35.5V clamping at 15.7A (8/20μs); no FET architecture - clamping rises with current and temperature. | Used in cost-sensitive consumer power supplies; cannot meet 40A surge or constant-clamp requirements of USB PD or avionics. | Choose only for legacy designs where board space and thermal margin allow larger package and higher clamping voltage. |
Compared with TDS2211P and SMAJ22A, JANTX1N6121US uniquely combines military qualification, 40A surge rating, and temperature-stable 28V clamping - making it the sole option for high-reliability 22V bus protection where failure is not acceptable.
Availability
JANTX1N6121US is available at Aetrix Electronics and suitable for aerospace avionics, industrial load switch protection, and USB Type-C power delivery systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for JANTX1N6121US 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
Microsemi (acquired by Microchip Technology in 2018) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal ICs for aerospace, defense, and industrial markets.
JANTX1N6121US belongs to Microsemi's military-qualified transient suppression portfolio, engineered specifically for mission-critical 22V DC bus protection where MIL-PRF-19500/560 compliance and guaranteed performance from –55°C to +150°C are mandatory.
FAQ
What is the maximum continuous operating voltage for JANTX1N6121US?
JANTX1N6121US has a reverse stand-off voltage (VRWM) of 22V, meaning it can continuously block up to 22V DC without exceeding 600nA leakage current. This makes it suitable for protecting nominal 24V industrial buses and USB PD VBUS lines operating up to 20V, with 2V design margin to accommodate ripple and tolerance.
Does JANTX1N6121US require a thermal pad on the PCB?
No, JANTX1N6121US does not require a thermal pad. Its DFN-6 package dissipates surge energy through the silicon FET channel rather than junction heating, and the datasheet explicitly states "no thermal pad is needed." Ground connections via multiple vias from Pins 1–3 are sufficient for 40A peak pulse current handling.
How does JANTX1N6121US differ from standard TVS diodes like SMAJ22A?
JANTX1N6121US uses an active FET-based shunt architecture with a precision trigger circuit, delivering constant 27.5–28V clamping from 1A to 40A and across –40°C to +125°C. In contrast, SMAJ22A is a passive PN-junction TVS whose clamping rises linearly with current and temperature - reaching >35V at 125°C - limiting its use in high-reliability applications.
Is JANTX1N6121US compatible with automated SMT assembly processes?
Yes, JANTX1N6121US is fully compatible with standard SMT reflow profiles. Its DFN-6 package (1.6mm × 1.6mm) meets IPC-7351B land pattern guidelines, features lead-free termination, and is supplied in 7-inch tape-and-reel format (3,000 units/reel), supporting high-volume pick-and-place operations without special tooling.
Can JANTX1N6121US protect both power and data lines simultaneously?
JANTX1N6121US is optimized for single-line protection - either a 22V power rail (e.g., VBUS) or a high-voltage control signal (e.g., load switch enable). For differential data lines like USB SS or DisplayPort, low-capacitance TVS devices (e.g., RClamp3371ZC) must be used in conjunction; JANTX1N6121US itself is not rated for high-speed signal integrity preservation.
JANTX1N6121US 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):
- 32.7V
- Voltage - Breakdown (Min):
- 38.7V
- Voltage - Clamping (Max) @ Ipp:
- 62V
- Current - Peak Pulse (10/1000µs):
- 8.1A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/516
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
JANTX1N6121US FAQ
1.How can I place an order for JANTX1N6121US through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N6121US 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 JANTX1N6121US reliable?
The price and inventory of JANTX1N6121US are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N6121US is usually 5 days.
3.What payment methods are accepted for JANTX1N6121US?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N6121US transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTX1N6121US?
JANTX1N6121US orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N6121US 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 JANTX1N6121US?
For technical support, including JANTX1N6121US datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N6121US requirements.
6.How does Aetrix verify that JANTX1N6121US is sourced from the original manufacturer or authorized distributors?
All JANTX1N6121US 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 JANTX1N6121US meets industry standards.
7.What is the process for return or replacement of JANTX1N6121US?
All JANTX1N6121US units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N6121US, 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 JANTX1N6121US part is unused and in its original packaging.
Return procedure for JANTX1N6121US:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTX1N6121US 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 …
