AX97-30220 Equivalent & Substitute Parts Reference

Part Overview

The AX97-30220 is a 22 µH unshielded drum core wirewound inductor manufactured by Triad Magnetics, rated for 3.1 A continuous current with a maximum DC resistance of 70 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 795 units in stock.

Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter tolerances while maintaining surface mount compatibility and compliance certifications. Alternative components may be necessary due to inventory availability, lead time constraints, or specific application requirements.

Key Parameters

Parameter	Value	Unit
Inductance	22	µH
Current Rating	3.1	A
DC Resistance (Max)	70	mOhm
Core Type	Drum Core, Wirewound	—
Core Material	Ferrite	—
Shielding	Unshielded	—
Mounting Type	Surface Mount	—
Operating Temperature Range	-40 to 85	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the AX97-30220 is determined by the following critical parameters:

Primary Matching Criteria:

Inductance value: 22 µH (tolerance range ±15% to ±20%)
Core type: Drum core wirewound construction
Core material: Ferrite
Mounting type: Surface mount (SMD)
Compliance: ROHS3 compliant

Secondary Compatibility Factors:

Current rating: Minimum 3.1 A (substitute must support full load)
DC resistance: Maximum 100 mOhm (acceptable variance from 70 mOhm specification)
Operating temperature: Minimum -40°C to 85°C overlap required
Package form factor: Nonstandard SMD dimensions with height ≤ 5.90 mm

The SRR1005-220Y from Bourns Inc. meets the primary matching criteria with equivalent 22 µH inductance and ferrite drum core construction. However, the current rating of 1.4 A is below the AX97-30220 specification of 3.1 A, which represents a functional limitation in high-current applications.

Parameter Comparison

Parameter	AX97-30220 (Triad Magnetics)	SRR1005-220Y (Bourns Inc.)	Compatibility Notes
Inductance	22 µH	22 µH	Matched
Inductance Tolerance	±20%	±15%	SRR1005-220Y tighter tolerance
Current Rating	3.1 A	1.4 A	AX97-30220 higher capacity
DC Resistance (Max)	70 mOhm	100 mOhm	SRR1005-220Y higher resistance
Core Type	Drum Core, Wirewound	Drum Core, Wirewound	Matched
Core Material	Ferrite	Ferrite	Matched
Shielding	Unshielded	Shielded	Different shielding approach
Operating Temperature	-40 to 85°C	-40 to 125°C	SRR1005-220Y extended range
Mounting Type	Surface Mount	Surface Mount	Matched
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Matched
Size (L x W)	13.46 x 9.40 mm	12.70 x 10.00 mm	Similar footprint
Height (Max)	5.90 mm	5.20 mm	SRR1005-220Y lower profile

Engineering Selection Recommendations

AX97-30220 Selection Criteria:

Applications requiring continuous current load of 3.1 A or higher
Systems with operating temperature limited to 85°C maximum
Designs prioritizing lower DC resistance (70 mOhm) for reduced power dissipation
Unshielded configuration acceptable for EMI environment

SRR1005-220Y Selection Criteria:

Applications with current requirements ≤ 1.4 A
Systems requiring extended operating temperature range up to 125°C
Designs benefiting from shielded construction to reduce electromagnetic interference
Space-constrained layouts where 5.20 mm height provides advantage
Higher inductance tolerance (±15%) acceptable for application requirements

Both components maintain ROHS3 compliance and are suitable for surface mount assembly. Selection between these parts depends on current load requirements and thermal operating conditions specific to the application circuit.

Frequently Asked Questions (FAQ)

Q: Can SRR1005-220Y replace AX97-30220 in all applications?

A: No. The SRR1005-220Y has a maximum current rating of 1.4 A, which is insufficient for applications requiring the full 3.1 A capacity of the AX97-30220. Substitution is only valid for circuits operating at or below 1.4 A continuous current.

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

A: The AX97-30220 specifies 70 mOhm maximum DC resistance, while the SRR1005-220Y specifies 100 mOhm maximum. Higher DC resistance increases power dissipation (I²R losses). In high-current applications, this difference becomes significant. At 1.4 A, the SRR1005-220Y dissipates approximately 0.196 W maximum, compared to 0.137 W for the AX97-30220 at the same current.

Q: Does shielding affect circuit performance?

A: Shielding characteristics differ between these parts. The AX97-30220 is unshielded, while the SRR1005-220Y is shielded. Shielded inductors reduce radiated EMI but may have different coupling characteristics in multi-inductor circuits. Circuit layout and EMI requirements determine whether shielding is beneficial or unnecessary.

Q: Are the physical dimensions compatible with the same PCB footprint?

A: The parts have similar but not identical dimensions. AX97-30220 measures 13.46 x 9.40 x 5.90 mm (L x W x H), while SRR1005-220Y measures 12.70 x 10.00 x 5.20 mm. Both fit within typical SMD assembly equipment tolerances, but PCB layout should be verified for specific mounting requirements.

Q: What is the difference in inductance tolerance?

A: AX97-30220 has ±20% tolerance, while SRR1005-220Y has ±15% tolerance. The tighter tolerance of the SRR1005-220Y provides better inductance consistency across production batches, which may be advantageous in precision filter or resonant circuit applications.

Q: Are both parts suitable for high-temperature applications?

A: The AX97-30220 operates to 85°C maximum, while the SRR1005-220Y operates to 125°C maximum. For applications exceeding 85°C ambient or elevated internal temperatures, the SRR1005-220Y provides extended thermal capability.

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