AX104R-8R2 Equivalent & Substitute Parts

Part Overview

The AX104R-8R2 is an 8.2 µH shielded drum core wirewound inductor manufactured by Triad Magnetics, rated for 4.6 A continuous current with a maximum DC resistance of 25 mOhm. 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 856 pieces available in stock.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this inductor category.

Key Parameters

Parameter	Value	Unit
Inductance	8.2	µH
Inductance Tolerance	±30%	-
Current Rating	4.6	A
DC Resistance (DCR)	25	mOhm Max
Core Type	Ferrite Drum Core	-
Shielding	Shielded	-
Mounting Type	Surface Mount (SMD)	-
Operating Temperature Range	-40°C to 85°C	-
Inductance Test Frequency	100	kHz
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution eligibility for the AX104R-8R2 is determined by the following critical parameters:

Electrical Equivalence Requirements:

Inductance value: 8.2 µH (within ±30% tolerance specification)
Current rating: minimum 4.6 A continuous
DC resistance: must not exceed 25 mOhm maximum
Core material: Ferrite
Shielding: Shielded configuration

Mechanical Compatibility Requirements:

Mounting type: Surface Mount (SMD)
Package classification: Nonstandard drum core form factor
Inductance test frequency: 100 kHz

Compliance Requirements:

RoHS3 compliance mandatory
REACH unaffected status

The substitute part SRU1048-8R2Y meets all electrical equivalence criteria with identical inductance and current rating specifications. The DC resistance of 15 mOhm is superior to the 25 mOhm maximum specification of the main part, providing improved performance margin. Both parts share ferrite drum core construction, shielded configuration, and surface mount packaging.

Parameter Comparison

Parameter	AX104R-8R2 (Main)	SRU1048-8R2Y (Substitute)	Compatibility
Manufacturer	Triad Magnetics	Bourns Inc.	Different source
Inductance	8.2 µH	8.2 µH	Equivalent
Inductance Tolerance	±30%	±30%	Equivalent
Current Rating	4.6 A	4.6 A	Equivalent
DC Resistance (DCR)	25 mOhm Max	15 mOhm	Substitute superior
Core Type	Ferrite Drum Core	Ferrite Drum Core	Equivalent
Shielding	Shielded	Shielded	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Operating Temperature Range	-40°C to 85°C	-40°C to 125°C	Substitute wider range
Inductance Test Frequency	100 kHz	100 kHz	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
REACH Status	REACH Unaffected	REACH Unaffected	Equivalent
Packaging	Box	Tape & Reel (TR)	Different format
Size/Dimension	10.40mm L x 10.30mm W	10.00mm L x 10.00mm W	Physically similar
Height - Seated (Max)	4.00 mm	5.10 mm	Substitute taller

Engineering Selection Recommendations

Primary Selection (AX104R-8R2): Select the AX104R-8R2 when the original specification is required, including the specific thermal operating range of -40°C to 85°C and the box packaging format. This part maintains active production status with adequate inventory availability (856 pieces in stock).

Substitute Selection (SRU1048-8R2Y): The SRU1048-8R2Y from Bourns Inc. is electrically and mechanically compatible for applications where the following conditions are met:

Operating temperature environment does not exceed 125°C (the substitute's upper limit)
PCB layout accommodates the increased height of 5.10 mm versus 4.00 mm
Tape & Reel packaging format is acceptable for production workflows
Lower DC resistance (15 mOhm versus 25 mOhm maximum) provides performance margin

Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for equivalent applications.

Frequently Asked Questions (FAQ)

Q: Can SRU1048-8R2Y replace AX104R-8R2 in all applications?

A: Electrical substitution is valid when the application operates within -40°C to 125°C and the PCB layout accommodates the 5.10 mm seated height of the SRU1048-8R2Y. The substitute's lower DC resistance (15 mOhm) is compatible with circuits designed for the 25 mOhm maximum specification.

Q: What is the physical size difference between these parts?

A: The AX104R-8R2 measures 10.40mm L x 10.30mm W x 4.00mm H (seated). The SRU1048-8R2Y measures 10.00mm L x 10.00mm W x 5.10mm H (seated). The substitute is slightly smaller in footprint but 1.10 mm taller.

Q: Are both parts RoHS compliant?

A: Yes. Both AX104R-8R2 and SRU1048-8R2Y are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Q: What is the difference in packaging between these parts?

A: The AX104R-8R2 is supplied in Box packaging. The SRU1048-8R2Y is supplied in Tape & Reel (TR) format. Packaging selection depends on production volume and assembly process requirements.

Q: Do both inductors have identical electrical specifications?

A: Both parts share 8.2 µH inductance, ±30% tolerance, 4.6 A current rating, and 100 kHz test frequency. The SRU1048-8R2Y provides superior DC resistance performance at 15 mOhm compared to the 25 mOhm maximum of the AX104R-8R2.

Q: Which part should be selected for high-temperature applications?

A: For applications requiring operation above 85°C, the SRU1048-8R2Y supports temperatures up to 125°C. The AX104R-8R2 is limited to 85°C maximum.

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