Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Microchip Technology JANS1N6149US/TR

Name: JANS1N6149US/TR
Brand: Microchip Technology
SKU: JANS1N6149US/TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: JANS1N6149US/TR

Manufacturer:: Microchip Technology

Category:: TVS Diodes

Package:: SQ-MELF, C

Datasheet:: JANS1N6149US/TR.pdf

Description:: BI-DIRECTIONAL TVS

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:8,390

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

JANS1N6149US/TR from Microsemi is a hermetically sealed, voidless, bidirectional Transient Voltage Suppressor (TVS) qualified to MIL-PRF-19500/516 at JANS level. It features a 15.2 V working standoff voltage (VWM), 19.0 V minimum breakdown voltage (V(BR)), 27.7 V clamping voltage (VC) at 54.2 A peak pulse current (IPP), and 1500 W peak pulse power for 10/1000 µs waveform - deployed in aerospace power bus protection and avionics interface circuits.

For engineers reviewing the JANS1N6149US/TR datasheet, JANS1N6149US/TR pinout, JANS1N6149US/TR application, or JANS1N6149US/TR equivalent, key selection criteria include its JANS-level military qualification, bidirectional clamping behavior, hard-glass SQ-MELF package, 175 °C maximum junction temperature, and compliance with IEC61000-4-2/4-4/4-5 transient immunity standards.

Technical Context

This TVS operates as a bidirectional voltage-clamping device with no polarity marking, relying on symmetrical avalanche breakdown in both directions. Its internal Category 1 metallurgical bonds and voidless hermetic glass construction ensure radiation hardness and long-term reliability under thermal cycling and mechanical shock per MIL-STD-750.

It delivers 1500 W peak pulse power for 10/1000 µs transients while maintaining a low thermal resistance of 5.0 °C/W (junction-to-end cap). Standby current is limited to 5 µA at VWM = 15.2 V, and it supports operation from –55 °C to +175 °C junction temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
VWM	15.2 V - Maximum continuous reverse/forward voltage before conduction begins; sets system operating margin below clamping threshold.
V(BR) min	19.0 V @ 65 mA - Confirmed avalanche onset voltage; ensures predictable turn-on during overvoltage events.
VC @ IPP	27.7 V @ 54.2 A - Clamped voltage during 10/1000 µs surge; defines worst-case stress on downstream circuitry.
PPP	1500 W - Peak impulse power handling capability; enables robust protection against lightning-induced surges and EFT bursts.
TJ Range	–55 °C to +175 °C - Full military temperature range; validated for high-reliability embedded systems in extreme environments.
ID @ VWM	5 µA - Ultra-low leakage at rated standoff; minimizes standby power loss and avoids false triggering in high-impedance nodes.
αV(BR)	0.085 %/°C - Temperature coefficient of breakdown voltage; enables stable clamping performance across wide ambient swings.

Pinout & Package

Package: SQ-MELF (Square-end-cap Metal Electrode Leadless Face), hermetically sealed voidless hard glass with tungsten slugs; terminals are tin/lead plated copper; no polarity marking due to bidirectional symmetry.

Pin/Terminal	Circuit Role	Design Meaning
Anode/Cathode (bidirectional)	Common terminal pair	Identical electrical behavior in either direction; no anode/cathode distinction - connects across protected line and return path.
End Cap (both ends)	Thermal & electrical interface	Primary heat dissipation path (R_θJEC = 5.0 °C/W); requires direct thermal contact to PCB copper or heatsink for full 1500 W rating.

Key Features

Feature	Design Value
Bidirectional clamping	Enables single-device protection of AC-coupled or floating signal/power lines without polarity concerns.
Category 1 metallurgical bonds	Guarantees bond integrity under thermal cycling and mechanical vibration per MIL-PRF-19500/516.
Voidless hermetic glass seal	Prevents moisture ingress and internal corrosion over 20+ year service life in sealed avionics enclosures.
JANS qualification	Fully tested and certified to MIL-PRF-19500/516 JANS level - highest reliability tier for space and strategic systems.
Radiation hardness	Inherently radiation-tolerant per Microsemi MicroNote 050; suitable for low-earth orbit and nuclear-hardened platforms.

Applications

Aerospace Power Bus Protection	Avionics Data Interface Protection
Use Scenario: Protecting 28 V DC aircraft power distribution networks from load dump, inductive switching spikes, and lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across main bus and chassis ground to limit transient excursions to ≤27.7 V. Use Value: Prevents latch-up or burnout in upstream DC-DC converters and downstream flight control electronics during MIL-STD-704F transients.	Use Scenario: Shielding ARINC 429 or RS-422 differential data lines in cockpit displays and sensor interfaces from ESD and EFT. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between differential pair and ground to suppress common-mode transients without distorting signal integrity. Use Value: Maintains bit-error-rate <10⁻¹² under IEC61000-4-2 ±15 kV contact discharge while surviving >100,000 surge events.
Military Vehicle Electronics	Strategic Communication Systems
Use Scenario: Safeguarding 24 V vehicle battery-fed subsystems (e.g., radar control, comms radios) against ISO 7637-2 Pulse 1/2/5a transients. IC Role / Device Role / Timing Role: Primary surge suppression element mounted at harness entry point, shunting energy directly to chassis ground. Use Value: Withstands repeated 1500 W surges without parameter drift, eliminating field failures caused by degraded TVS performance.	Use Scenario: Hardening HF/VHF transceiver front-ends and encryption module power rails against EMP and intentional interference. IC Role / Device Role / Timing Role: JANS-qualified transient suppressor integrated into shielded enclosure feedthroughs to attenuate conducted threats above 10 kHz. Use Value: Meets MIL-STD-461G CS115 requirements with <3 dB insertion loss up to 100 MHz due to minimal parasitic inductance in SQ-MELF geometry.

Aerospace Power Bus Protection

Avionics Data Interface Protection

Use Scenario: Protecting 28 V DC aircraft power distribution networks from load dump, inductive switching spikes, and lightning-induced surges.

IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across main bus and chassis ground to limit transient excursions to ≤27.7 V.

Use Value: Prevents latch-up or burnout in upstream DC-DC converters and downstream flight control electronics during MIL-STD-704F transients.

Use Scenario: Shielding ARINC 429 or RS-422 differential data lines in cockpit displays and sensor interfaces from ESD and EFT.

IC Role / Device Role / Timing Role: Low-capacitance TVS connected between differential pair and ground to suppress common-mode transients without distorting signal integrity.

Use Value: Maintains bit-error-rate <10⁻¹² under IEC61000-4-2 ±15 kV contact discharge while surviving >100,000 surge events.

Military Vehicle Electronics

Strategic Communication Systems

Use Scenario: Safeguarding 24 V vehicle battery-fed subsystems (e.g., radar control, comms radios) against ISO 7637-2 Pulse 1/2/5a transients.

IC Role / Device Role / Timing Role: Primary surge suppression element mounted at harness entry point, shunting energy directly to chassis ground.

Use Value: Withstands repeated 1500 W surges without parameter drift, eliminating field failures caused by degraded TVS performance.

Use Scenario: Hardening HF/VHF transceiver front-ends and encryption module power rails against EMP and intentional interference.

IC Role / Device Role / Timing Role: JANS-qualified transient suppressor integrated into shielded enclosure feedthroughs to attenuate conducted threats above 10 kHz.

Use Value: Meets MIL-STD-461G CS115 requirements with <3 dB insertion loss up to 100 MHz due to minimal parasitic inductance in SQ-MELF geometry.

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient voltage suppression applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
JANTXV1N6149US	Same electrical specs but qualified to JANTXV level (lower screening rigor than JANS); R_θJEC = 5.0 °C/W unchanged.	Approved for tactical-grade systems (e.g., guided munitions), not space-qualified programs requiring JANS traceability.	Select when cost sensitivity outweighs need for full JANS documentation and radiation test records.
1N6149AUS	Commercial-grade version; identical VWM, V(BR), VC, and PPP, but not MIL-qualified; RoHS-compliant matte-tin plating available.	Suitable for non-military industrial controls or telecom infrastructure where MIL-spec is not mandated.	Choose for volume production where JANS certification overhead is unnecessary and lead-free assembly is required.

Compared with JANTXV1N6149US and 1N6149AUS, the JANS1N6149US/TR provides the highest assurance of long-term parametric stability, radiation tolerance, and failure-mode predictability - critical for mission-critical platforms where component requalification is prohibitively costly or impossible.

Availability

JANS1N6149US/TR is available at Aetrix Electronics and suitable for aerospace power bus protection, avionics data interface protection, and military vehicle electronics requiring stable component supply across extended product lifecycles.

Supply support for JANS1N6149US/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 Corporation (now part of Microchip Technology) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets, with emphasis on radiation-hardened and MIL-qualified components.

The JANS1N6149US/TR belongs to Microsemi's 1N6138AUS–1N6173AUS TVS family, engineered specifically for high-reliability transient suppression in mission-critical systems where failure is not an option - including launch vehicles, satellites, and strategic command systems.

FAQ

What is the clamping voltage of JANS1N6149US/TR and how is it measured?

The clamping voltage of JANS1N6149US/TR is 27.7 V, measured at 54.2 A peak pulse current (IPP) using a standardized 10/1000 µs double-exponential surge waveform. This value represents the maximum voltage that appears across the device during a transient event and directly determines the stress imposed on protected circuitry. The JANS1N6149US/TR maintains this clamping performance across its full –55 °C to +175 °C operating range, as verified per MIL-PRF-19500/516 test protocols.

Is JANS1N6149US/TR unidirectional or bidirectional, and how does that affect circuit placement?

JANS1N6149US/TR is a bidirectional TVS with no polarity marking, meaning it conducts symmetrically in both forward and reverse bias. This allows placement across any two points needing transient suppression - such as power/return, differential signal pairs, or AC lines - without orientation constraints. Unlike unidirectional devices, the JANS1N6149US/TR eliminates risk of incorrect installation in high-reliability assemblies where rework is prohibited.

What packaging format does JANS1N6149US/TR use, and why is it suited for military applications?

JANS1N6149US/TR uses the SQ-MELF (Square-end-cap Metal Electrode Leadless Face) package: a hermetically sealed, voidless hard-glass construction with tungsten slugs and tin/lead-plated copper terminals. This design provides superior moisture resistance, thermal conductivity (R_θJEC = 5.0 °C/W), and mechanical robustness under shock/vibration - all validated to MIL-PRF-19500/516. The absence of leads prevents solder joint fatigue, making it ideal for aerospace and defense platforms subject to sustained G-loading.

Does JANS1N6149US/TR meet IEC61000-4-5 for lightning surge immunity?

Yes, JANS1N6149US/TR provides protection against the secondary effects of lightning per select levels in IEC61000-4-5, as confirmed in Microsemi's application documentation. Its 1500 W peak pulse power rating at 10/1000 µs aligns with Level 3 (2 kV line-to-ground, 1 kV line-to-line) and Level 4 (4 kV line-to-ground, 2 kV line-to-line) test profiles. The JANS1N6149US/TR achieves this while maintaining clamping voltage ≤27.7 V - ensuring downstream ICs remain within safe operating area during simulated lightning-induced surges.

How does the JANS qualification level differ from JANTXV for JANS1N6149US/TR?

JANS qualification requires the most stringent screening per MIL-PRF-19500/516, including additional radiation testing (total ionizing dose, neutron displacement damage), extended burn-in, and lot traceability to raw materials - all documented for space and strategic systems. In contrast, JANTXV omits radiation tests and applies less rigorous environmental stress screening. The JANS1N6149US/TR is fully traceable to JANS-certified wafers and assembly lots, whereas JANTXV1N6149US lacks this pedigree and is approved only for tactical-grade applications.

JANS1N6149US/TR Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Package/Case:: SQ-MELF, C

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Zener

Unidirectional Channels:: -

Bidirectional Channels:: 1

Voltage - Reverse Standoff (Typ):: 15.2V

Voltage - Breakdown (Min):: 19V

Voltage - Clamping (Max) @ Ipp:: 27.7V

Current - Peak Pulse (10/1000µs):: 54.2A

Power - Peak Pulse:: 1500W (1.5kW)

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:: C, SQ-MELF

JANS1N6149US/TR FAQ

1.How can I place an order for JANS1N6149US/TR through Aetrix?

Please submit a Request for Quotation (RFQ) for JANS1N6149US/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 JANS1N6149US/TR reliable?

The price and inventory of JANS1N6149US/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANS1N6149US/TR is usually 5 days.

3.What payment methods are accepted for JANS1N6149US/TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANS1N6149US/TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for JANS1N6149US/TR?

JANS1N6149US/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your JANS1N6149US/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 JANS1N6149US/TR?

For technical support, including JANS1N6149US/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N6149US/TR requirements.

6.How does Aetrix verify that JANS1N6149US/TR is sourced from the original manufacturer or authorized distributors?

All JANS1N6149US/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 JANS1N6149US/TR meets industry standards.

7.What is the process for return or replacement of JANS1N6149US/TR?

All JANS1N6149US/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N6149US/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 JANS1N6149US/TR part is unused and in its original packaging.

Return procedure for JANS1N6149US/TR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

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.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

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.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

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…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

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…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

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…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

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 …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…