AX104R-221 Equivalent & Substitute Parts

Part Overview

The AX104R-221 is a 220 µH shielded drum core wirewound inductor manufactured by Triad Magnetics, designed for surface mount applications. This component operates at 920 mA maximum current with a DC resistance of 756 mOhm and is rated for -40°C to 85°C operating temperature. The part maintains Active product status with RoHS3 compliance and REACH unaffected certification. Substitute parts are identified when equivalent inductance values, shielding characteristics, and surface mount packaging are required for design flexibility, supply chain alternatives, or inventory optimization.

Substiute Parts

AX104R-221

Triad MagneticsIn Stock: 1098AX104R-221 Datasheet

Current PartRFQ

SRU1048-221Y

Bourns Inc.In Stock: 351228SRU1048-221Y Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AX104R-221 are qualified based on the following critical parameters:

Primary Substitution Criteria:

• Inductance value: 220 µH (matching nominal value within ±30% tolerance band)
• Core material: Ferrite drum core construction
• Shielding: Shielded configuration for EMI containment
• Mounting: Surface mount technology (SMD)
• Inductance test frequency: 100 kHz

Secondary Compatibility Parameters:

• Current rating: Minimum 800 mA (substitute must support primary circuit current requirements)
• DC resistance: Acceptable range determined by circuit power dissipation limits
• Operating temperature: Minimum -40°C to 85°C overlap required
• Regulatory compliance: RoHS3 and REACH status alignment

The SRU1048-221Y qualifies as a direct substitute based on matching inductance, core type, shielding, and surface mount packaging. Variations in current rating, DC resistance, and maximum operating temperature are documented for circuit-level evaluation.

Parameter Comparison

Engineering Selection Recommendations

AX104R-221 (Triad Magnetics) Selection Criteria:

• Applications requiring 920 mA current rating
• Circuits where higher DC resistance (756 mOhm) is acceptable or beneficial for current limiting
• Operating environments limited to -40°C to 85°C
• Compact height requirement (4.00 mm maximum seated height)
• Active product status with established supply chain

SRU1048-221Y (Bourns Inc.) Selection Criteria:

• Applications with current requirements up to 800 mA
• Circuits benefiting from lower DC resistance (350 mOhm) for reduced power dissipation
• Operating environments requiring extended temperature range (-40°C to 125°C)
• Applications tolerating increased component height (5.10 mm maximum seated height)
• Larger available inventory (351,154 pcs) for high-volume production
• Active product status with established supply chain

Both parts maintain RoHS3 compliance and REACH unaffected status, meeting regulatory requirements for commercial and industrial applications.

Frequently Asked Questions (FAQ)

Q: Can SRU1048-221Y directly replace AX104R-221 in all applications?

A: Direct substitution is valid when circuit current requirements do not exceed 800 mA. The SRU1048-221Y is rated for 800 mA maximum, compared to AX104R-221 at 920 mA. Verify actual circuit current draw before substitution. Both parts share identical 220 µH inductance and ±30% tolerance.

Q: What is the impact of different DC resistance values?

A: AX104R-221 exhibits 756 mOhm maximum DC resistance, while SRU1048-221Y is specified at 350 mOhm. Lower resistance reduces power dissipation (I²R losses). In circuits where the inductor carries continuous current, SRU1048-221Y generates less heat. Conversely, if DC resistance is intentionally used for current limiting, AX104R-221 provides greater resistance.

Q: Are there physical compatibility concerns?

A: Yes. AX104R-221 measures 10.40mm L x 10.30mm W x 4.00mm H (seated). SRU1048-221Y measures 10.00mm L x 10.00mm W x 5.10mm H (seated). Verify PCB footprint dimensions and vertical clearance in the assembly before substitution. Slight dimensional differences may affect placement in space-constrained designs.

Q: Which part is better for high-temperature applications?

A: SRU1048-221Y supports -40°C to 125°C operating temperature, compared to AX104R-221 at -40°C to 85°C. For applications exceeding 85°C ambient or requiring thermal margin, SRU1048-221Y is the appropriate selection.

Q: Do both parts meet regulatory compliance?

A: Yes. Both AX104R-221 and SRU1048-221Y are RoHS3 compliant and REACH unaffected. Both maintain Active product status with established manufacturer support.

Q: What is the substitution logic for 220 µH inductance?

A: Substitution is based on matching the nominal inductance value (220 µH) within the specified tolerance band (±30%). Both parts are tested at 100 kHz inductance frequency and maintain ferrite drum core shielded construction, ensuring equivalent magnetic performance in the specified frequency range.

Q: Can I use AX104R-221 as a substitute for SRU1048-221Y?

A: Yes, with circuit verification. AX104R-221 provides higher current rating (920 mA vs. 800 mA) and higher DC resistance (756 mOhm vs. 350 mOhm). Confirm that increased resistance does not negatively impact circuit performance. Physical dimensions differ; verify PCB compatibility.