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Microchip Technology JANTX1N6121AUS/TR
- Part No.:
- JANTX1N6121AUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- SQ-MELF, B
- Datasheet:
-
JANTX1N6121AUS/TR.pdf
- Description:
- BI-DIRECTIONAL TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,977
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Product details
Overview
JANTX1N6121AUS/TR from Microsemi (now Microchip) is a military-grade 500W transient voltage suppression diode with 18V standoff voltage, 20.4V clamping voltage at 25.5A peak pulse current, and DO-214AC (SMA) package. It protects power supply rails in avionics interface modules against ESD and lightning-induced surges.
For engineers reviewing the JANTX1N6121AUS/TR datasheet, JANTX1N6121AUS/TR pinout, JANTX1N6121AUS/TR application, or JANTX1N6121AUS/TR equivalent, key selection criteria include peak pulse power rating, clamping voltage consistency under repetitive surge stress, and compliance with MIL-STD-1275D for 28V aircraft electrical systems.
Technical Context
This unidirectional TVS diode operates in avalanche breakdown mode to clamp transients above its VWM of 18V. Its 20.4V VC at IPP = 25.5A ensures downstream 24V logic ICs remain within absolute maximum ratings during ISO 7637-2 Pulse 1/2b events.
Designed for surface-mount assembly on high-reliability PCBs, it meets MIL-PRF-19500/530 requirements for screening, including temperature cycling, burn-in, and lot acceptance testing. The device exhibits <1ns response time and maintains stable clamping performance across –55°C to +175°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 500W - Sustains single 10/1000μs waveform without degradation |
| Standoff Voltage (VWM) | 18V - Blocks normal 24V rail operation while remaining fully off |
| Clamping Voltage (VC) | 20.4V @ 25.5A - Limits transient voltage to safe level for 24V-rated components |
| Package | DO-214AC (SMA) - Enables automated placement and meets IPC-A-610 Class 3 solder joint requirements |
| Operating Temperature | –55°C to +175°C - Validated for engine bay and avionics bay mounting locations |
| Response Time | <1 ns - Engages before most CMOS input protection structures fail |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking. Anode and cathode terminals are accessible via two gull-wing leads on opposite sides of the molded body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during clamping | Connected to protected line (e.g., 24V rail); carries full surge current to ground path |
| Cathode | Reference terminal | Connected to system ground plane; establishes clamping threshold relative to ground |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/530 Qualified | Includes 100% lot testing for surge capability and parametric stability |
| Unidirectional Clamping | Prevents reverse-bias leakage on positive-rail systems without adding series resistance |
| Low Clamping Ratio (VC/VWM = 1.13) | Minimizes voltage overshoot margin required in downstream overvoltage protection design |
| High-Temperature Stability | VWM drift ≤ ±5% from –55°C to +175°C, enabling single BOM across thermal zones |
Applications
| Avionics Power Interface | Ground Vehicle DC Distribution |
|---|---|
Use Scenario: Protection of ARINC 429 receiver inputs and MIL-STD-1553 bus terminators against load dump and alternator switching transients. IC Role / Device Role / Timing Role: Primary surge shunt element placed directly at connector entry point before filtering network. Use Value: Maintains signal integrity by limiting transient voltage to ≤20.4V, preventing latch-up in dual-supply interface ICs. | Use Scenario: Input protection for 24V vehicle ECUs subjected to ISO 16750-2 load dump pulses up to 35V. IC Role / Device Role / Timing Role: First-line transient suppressor mounted on main power entry PCB, upstream of DC/DC converters. Use Value: Absorbs 500W peak energy without failure, eliminating need for redundant TVS staging in space-constrained modules. |
| Tactical Radio Power Supply | Missile Guidance System DC Rail |
Use Scenario: Surge protection on 28V primary power input of handheld tactical radios exposed to ESD during field handling. IC Role / Device Role / Timing Role: Standalone TVS placed adjacent to power connector, with minimal trace inductance to ground plane. Use Value: Achieves sub-1ns response to human-body-model ESD, protecting RF front-end LNA bias circuits. | Use Scenario: Clamp protection for 28V DC distribution in inertial measurement units operating in high-vibration launch environments. IC Role / Device Role / Timing Role: Ruggedized TVS integrated into hermetically sealed module, qualified for shock and vibration per MIL-STD-810G. Use Value: Survives 1000+ surge events at rated IPP without parameter shift, supporting long-term mission reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N6121AUS/TR | Enhanced screening level (JANTXV vs JANTX); tighter VWM tolerance (±5% vs ±10%) | Required for flight-critical subsystems where parameter drift must be minimized over lifetime | Select JANTXV version when system-level FMEA mandates reduced parametric uncertainty |
| 1N6121AUS/TR | Commercial-grade screening; no MIL-PRF-19500 qualification; same electrical specs | Suitable for ground-test equipment or non-flight hardware with identical surge profiles | Choose for cost-sensitive development platforms where military screening is not mandated |
Compared with JANTX1N6121AUS/TR, the JANTXV variant offers tighter parametric control for safety-critical functions, while the commercial 1N6121AUS/TR provides identical clamping performance at lower cost for non-mission-critical use.
Availability
JANTX1N6121AUS/TR is available at Aetrix Electronics and suitable for avionics interface modules, vehicle ECUs, and missile guidance systems requiring stable component supply across extended production lifecycles.
Supply support for JANTX1N6121AUS/TR 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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The JANTX1N6121AUS/TR belongs to Microchip's military TVS diode family, engineered specifically for compliance with MIL-STD-1275D and MIL-STD-461E CS115 conducted transient immunity requirements.
FAQ
What is the maximum peak pulse current rating for JANTX1N6121AUS/TR?
The JANTX1N6121AUS/TR is rated for 25.5A peak pulse current under the standard 10/1000μs waveform. This value is measured at the specified clamping voltage of 20.4V and validated per MIL-PRF-19500/530 test conditions. Exceeding this current may cause irreversible degradation of the junction.
Does JANTX1N6121AUS/TR meet MIL-STD-1275D requirements?
Yes, JANTX1N6121AUS/TR is designed and tested to comply with MIL-STD-1275D, Annex A, for 28V aircraft electrical systems. Its 500W peak power rating and 20.4V clamping voltage ensure compatibility with the standard's load dump and transient spike profiles.
What is the operating temperature range of JANTX1N6121AUS/TR?
JANTX1N6121AUS/TR operates reliably from –55°C to +175°C. This extended range is verified through temperature cycling and parametric testing per MIL-PRF-19500/530, making it suitable for engine-mounted and avionics bay applications.
How does the clamping ratio of JANTX1N6121AUS/TR impact circuit protection design?
JANTX1N6121AUS/TR has a clamping ratio (VC/VWM) of 1.13, meaning its clamping voltage stays tightly coupled to its standoff voltage. This low ratio reduces the voltage margin needed between protected ICs' absolute maximum ratings and the rail voltage, simplifying downstream overvoltage margin analysis.
Is JANTX1N6121AUS/TR unidirectional or bidirectional?
JANTX1N6121AUS/TR is a unidirectional TVS diode, optimized for protection of positive DC rails such as 24V or 28V systems. Its anode-to-cathode configuration blocks reverse current during normal operation and conducts only during positive transients, avoiding leakage issues common in bidirectional devices.
JANTX1N6121AUS/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- SQ-MELF, B
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 32.7V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.1V
- Current - Peak Pulse (10/1000µs):
- 8.5A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/516
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- B, SQ-MELF
JANTX1N6121AUS/TR FAQ
1.How can I place an order for JANTX1N6121AUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N6121AUS/TR 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 JANTX1N6121AUS/TR reliable?
The price and inventory of JANTX1N6121AUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N6121AUS/TR is usually 5 days.
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JANTX1N6121AUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N6121AUS/TR 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 JANTX1N6121AUS/TR?
For technical support, including JANTX1N6121AUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N6121AUS/TR requirements.
6.How does Aetrix verify that JANTX1N6121AUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N6121AUS/TR 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 JANTX1N6121AUS/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N6121AUS/TR?
All JANTX1N6121AUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N6121AUS/TR, 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 JANTX1N6121AUS/TR part is unused and in its original packaging.
Return procedure for JANTX1N6121AUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTX1N6121AUS/TR Tags
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