AX02-301R0 Equivalent & Substitute Parts

Part Overview

The AX02-301R0 is a 1 µH shielded drum core wirewound inductor manufactured by Triad Magnetics, designed for surface mount applications requiring high current handling. This component is rated for 23 A continuous current with a maximum DC resistance of 1.7 mOhm and operates across the temperature range of -40°C to 85°C. The part is currently active in production with ROHS3 compliance and is available in high inventory quantities.

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.

Key Parameters

Parameter	Value	Unit
Inductance	1	µH
Current Rating	23	A
DC Resistance (Max)	1.7	mOhm
Saturation Current	34	A
Inductance Tolerance	±20	%
Operating Temperature Range	-40 to 85	°C
Mounting Type	Surface Mount	—
Shielding	Shielded	—
Core Material	Ferrite	—

Substitute Part Grouping Explanation

Substitution eligibility for the AX02-301R0 is determined by the following critical parameters:

Electrical Equivalence Criteria:

Inductance value of 1 µH at 100 kHz test frequency
Inductance tolerance of ±20% or better
Current rating equal to or greater than 23 A
DC resistance within acceptable limits for the application
Saturation current sufficient to prevent core saturation under peak load conditions

Mechanical & Environmental Criteria:

Surface mount package configuration
Shielded drum core construction
Operating temperature range compatible with or exceeding -40°C to 85°C
RoHS3 compliance certification

Packaging Considerations:

Physical dimensions must accommodate the PCB layout constraints
Height and footprint compatibility with assembly equipment

The SRP1250-1R0M from Bourns Inc. meets these substitution criteria with equivalent inductance and tolerance specifications, higher current rating capability, and extended temperature range operation.

Parameter Comparison

Parameter	AX02-301R0 (Triad Magnetics)	SRP1250-1R0M (Bourns Inc.)	Compatibility
Inductance	1 µH	1 µH	Equivalent
Inductance Tolerance	±20%	±20%	Equivalent
Current Rating	23 A	29 A	Substitute rated higher
Saturation Current	34 A	50 A	Substitute rated higher
DC Resistance (Max)	1.7 mOhm	2.5 mOhm	Substitute within tolerance
Operating Temperature Range	-40°C to 85°C	-55°C to 150°C	Substitute exceeds range
Mounting Type	Surface Mount	Surface Mount	Equivalent
Shielding	Shielded	Shielded	Equivalent
Core Type	Drum Core, Wirewound	Drum Core, Wirewound	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Inductance Test Frequency	100 kHz	100 kHz	Equivalent

Engineering Selection Recommendations

Primary Part Selection (AX02-301R0): The AX02-301R0 is the specified component for applications requiring the exact electrical and thermal characteristics defined in the design. This part maintains active production status with ROHS3 compliance and REACH unaffected certification. Selection is appropriate when the -40°C to 85°C operating range and 1.7 mOhm maximum DC resistance are design requirements.

Substitute Part Selection (SRP1250-1R0M): The SRP1250-1R0M from Bourns Inc. serves as a functional equivalent when the primary part is unavailable. This substitute provides higher current rating (29 A vs. 23 A) and saturation current (50 A vs. 34 A), offering additional design margin. The extended operating temperature range (-55°C to 150°C) accommodates more demanding thermal environments. The DC resistance specification of 2.5 mOhm maximum remains within acceptable limits for most applications. Both parts maintain identical inductance values, tolerance specifications, and RoHS3 compliance status.

Compliance Verification: Both parts are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for commercial and industrial applications. ECCN classification is EAR99 for both components.

Frequently Asked Questions (FAQ)

Q: Can the SRP1250-1R0M directly replace the AX02-301R0 in my circuit?

A: The SRP1250-1R0M is electrically equivalent for the specified inductance value of 1 µH with ±20% tolerance. Both parts are shielded drum core wirewound inductors with surface mount configuration. Physical dimensions differ slightly (13.90mm x 13.50mm vs. 13.30mm x 15.00mm), requiring verification of PCB layout compatibility. The substitute's higher current rating and lower saturation current threshold do not create functional incompatibility.

Q: What is the significance of the DC resistance difference between these parts?

A: The AX02-301R0 specifies 1.7 mOhm maximum DC resistance, while the SRP1250-1R0M specifies 2.5 mOhm maximum. This 0.8 mOhm difference results in slightly higher resistive losses in the substitute part. For applications where DC resistance is a critical design parameter, this difference must be evaluated against the circuit's power dissipation budget and thermal management requirements.

Q: Are there packaging differences that affect assembly?

A: The AX02-301R0 is supplied in Box packaging, while the SRP1250-1R0M is supplied in Tape & Reel (TR) format. This affects procurement and assembly processes but does not impact electrical or mechanical compatibility. The component footprints are both 2-SMD configurations suitable for automated surface mount assembly.

Q: Which part should I select for extended temperature applications?

A: The SRP1250-1R0M operates across -55°C to 150°C, compared to the AX02-301R0's -40°C to 85°C range. For applications requiring operation below -40°C or above 85°C, the SRP1250-1R0M is the appropriate selection. Both parts maintain ROHS3 compliance across their respective operating ranges.

Q: Do both parts meet the same regulatory standards?

A: Both the AX02-301R0 and SRP1250-1R0M are ROHS3 compliant and REACH unaffected. Both carry EAR99 ECCN classification. Regulatory compliance is equivalent between the two parts.

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