AX104R-331 Equivalent & Substitute Parts

Part Overview

The AX104R-331 is a 330 µH shielded drum core wirewound inductor manufactured by Triad Magnetics, rated for 0.7 A continuous current with a maximum DC resistance of 1.09 Ohm. This surface mount component operates across the temperature range of -40°C to 85°C and is ROHS3 compliant. The part is currently active in production with 677 pieces available in new original stock.

Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter tolerances while maintaining functional compatibility in the target application circuit.

Substiute Parts

AX104R-331

Triad MagneticsIn Stock: 726AX104R-331 Datasheet

Current PartRFQ

SRU1048-331Y

Bourns Inc.In Stock: 3645SRU1048-331Y Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AX104R-331 is determined by the following critical parameters:

Inductance Value: The substitute part must maintain 330 µH inductance within the ±30% tolerance band, measured at 100 kHz test frequency.

Current Rating: The substitute part current rating must equal or exceed 0.7 A to support the same load conditions without thermal stress or saturation effects.

DC Resistance: The substitute part DC resistance must not exceed 1.09 Ohm to maintain equivalent power dissipation characteristics and circuit performance.

Core Material and Shielding: The substitute must use ferrite drum core construction with shielding to preserve electromagnetic isolation and frequency response.

Mounting Configuration: The substitute must be surface mount compatible to fit the same PCB footprint and assembly process.

Compliance: The substitute must maintain ROHS3 compliance and REACH unaffected status for regulatory alignment.

The SRU1048-331Y from Bourns Inc. qualifies as a substitute based on matching inductance value, ferrite shielded drum core construction, surface mount configuration, and regulatory compliance. However, the current rating differential (650 mA vs. 0.7 A) and DC resistance reduction (490 mOhm vs. 1.09 Ohm max) represent design trade-offs requiring circuit-level evaluation.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (AX104R-331): Select the AX104R-331 when the application requires the specified 0.7 A current rating and 1.09 Ohm maximum DC resistance. This part is active in production with established supply availability (677 pieces in stock) and meets all regulatory requirements.

Substitute Selection (SRU1048-331Y): The SRU1048-331Y qualifies as a substitute when circuit design permits operation at 650 mA maximum current and the lower DC resistance (490 mOhm) is acceptable or beneficial. The extended operating temperature range (-40°C to 125°C) provides additional thermal margin compared to the primary part. Both parts maintain ROHS3 compliance and REACH unaffected status. Physical dimensions differ slightly (10.00mm x 10.00mm vs. 10.40mm x 10.30mm, with 5.10mm vs. 4.00mm height), requiring PCB layout verification.

Selection between these parts depends on current load requirements, thermal environment, and available PCB space. The substitute offers superior thermal performance and lower resistive losses but reduced current capacity.

Frequently Asked Questions (FAQ)

Q: Can the SRU1048-331Y replace the AX104R-331 in all applications?

A: The SRU1048-331Y is electrically compatible for inductance value and core characteristics. However, the 650 mA current rating is lower than the AX104R-331's 0.7 A rating. Substitution is valid only when the circuit current demand does not exceed 650 mA. The lower DC resistance (490 mOhm vs. 1.09 Ohm) may reduce power dissipation but does not prevent substitution.

Q: What are the physical compatibility considerations?

A: Both parts use nonstandard SMD packages with similar footprints (10.40mm x 10.30mm vs. 10.00mm x 10.00mm). The SRU1048-331Y is taller (5.10mm vs. 4.00mm). PCB layout and component clearance must be verified before substitution to ensure no mechanical interference with adjacent components or enclosure constraints.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the AX104R-331 and SRU1048-331Y are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and use.

Q: What is the inductance tolerance for both parts?

A: Both parts specify ±30% inductance tolerance, measured at 100 kHz test frequency. This tolerance band must be considered in circuit design to ensure acceptable performance across the full tolerance range.

Q: How do the operating temperature ranges differ?

A: The AX104R-331 operates from -40°C to 85°C, while the SRU1048-331Y operates from -40°C to 125°C. The substitute part provides a 40°C higher maximum operating temperature, offering improved thermal margin in high-temperature environments.

Q: What packaging formats are available?

A: The AX104R-331 is supplied in Box packaging. The SRU1048-331Y is supplied in Tape & Reel (TR) format. Packaging selection may affect procurement quantities and assembly process compatibility.