300LS-820K=P2 Equivalent & Substitute Parts Reference

Part Overview

The 300LS-820K=P2 is an 82 µH unshielded drum core wirewound inductor manufactured by Toko America Inc., designed for surface mount applications in the 1812 (4532 Metric) package. This component operates at 75 mA maximum current with a DC resistance of 4.42 Ohm maximum and is rated for -10°C to 60°C operating temperature range. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility within specified electrical and mechanical parameters.

Substiute Parts

300LS-820K=P2

Toko America Inc.In Stock: 1602300LS-820K=P2 Datasheet

Current PartRFQ

CM453232-820JL

Bourns Inc.In Stock: 1959CM453232-820JL Datasheet

SimilarRFQ

CM453232-820KL

Bourns Inc.In Stock: 864CM453232-820KL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 300LS-820K=P2 are identified based on strict electrical and mechanical parameter alignment. The following criteria determine substitution eligibility:

Primary Matching Criteria:

• Inductance value: 82 µH (exact match required)
• Package / Case: 1812 (4532 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Core Material: Ferrite (exact match required)
• Shielding: Unshielded (exact match required)

Secondary Compatibility Parameters:

• Current Rating: Substitute must equal or exceed 75 mA
• DC Resistance (DCR): Substitute must not exceed 4.42 Ohm maximum
• Tolerance: ±10% or tighter acceptable

The identified substitutes (CM453232-820JL and CM453232-820KL) satisfy all primary matching criteria. Both parts are manufactured by Bourns Inc., feature identical inductance, package dimensions, and core specifications. Current ratings of 120 mA exceed the original 75 mA requirement. DC resistance values of 7 Ohm maximum exceed the original 4.42 Ohm specification, requiring circuit-level evaluation for applications sensitive to inductor losses.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The 300LS-820K=P2 is classified as obsolete. Both substitute parts (CM453232-820JL and CM453232-820KL) are active products with confirmed inventory availability, ensuring long-term supply chain continuity.

Compliance and Certification: The original part is RoHS non-compliant. Both Bourns substitutes are ROHS3 compliant and REACH unaffected, meeting modern regulatory requirements for electronic component procurement. This compliance status is significant for applications subject to environmental and hazardous substance restrictions.

Electrical Parameter Deviations: The substitute parts exhibit higher DC resistance (7 Ohm maximum versus 4.42 Ohm maximum). This 58% increase in DCR will result in proportionally higher power dissipation in the inductor. Applications operating at or near the 75 mA current limit of the original part must account for increased thermal generation. The substitute parts' 120 mA current rating provides operational margin above the original 75 mA specification.

Mechanical Compatibility: Substitute parts feature identical footprint dimensions (0.177" L x 0.126" W) and package type (1812 / 4532 Metric). Seated height increases from 3.20mm to 3.40mm maximum, a 0.20mm difference requiring verification against PCB clearance constraints in height-restricted applications.

Temperature Range Enhancement: Substitute parts operate across -40°C to 125°C, compared to the original -10°C to 60°C range, providing extended thermal operating envelope.

Frequently Asked Questions (FAQ)

Q: Can CM453232-820JL and CM453232-820KL be used interchangeably as substitutes for 300LS-820K=P2?

A: Both Bourns parts satisfy primary substitution criteria (inductance, package, core material, shielding). The primary difference between them is tolerance: CM453232-820JL offers ±5% tolerance while CM453232-820KL matches the original ±10% tolerance. Selection depends on circuit tolerance requirements. Both parts are electrically and mechanically compatible within the specified parameters.

Q: What is the impact of the higher DC resistance in the substitute parts?

A: The substitute parts specify 7 Ohm maximum DCR compared to 4.42 Ohm maximum in the original part. At the original 75 mA operating current, this results in approximately 0.33 mW additional power dissipation in the substitute versus 0.25 mW in the original. Applications sensitive to inductor losses or thermal performance must evaluate this difference against circuit requirements.

Q: Are there physical mounting differences between the original and substitute parts?

A: Both substitute parts maintain identical footprint dimensions (0.177" L x 0.126" W / 4.50mm x 3.20mm). Maximum seated height increases from 3.20mm to 3.40mm. PCB designs with height constraints below 3.40mm require clearance verification before substitution.

Q: Do the substitute parts meet current regulatory requirements?

A: Yes. Both CM453232-820JL and CM453232-820KL are ROHS3 compliant and REACH unaffected, whereas the original 300LS-820K=P2 is RoHS non-compliant. This compliance status is mandatory for applications subject to environmental regulations in regulated markets.

Q: What is the difference between CM453232-820JL and CM453232-820KL?

A: Both parts are electrically and mechanically identical with one exception: tolerance specification. CM453232-820JL provides ±5% inductance tolerance; CM453232-820KL provides ±10% inductance tolerance matching the original part. Selection should align with circuit tolerance requirements.

Q: Can the substitute parts handle higher current than the original?

A: Yes. Substitute parts are rated for 120 mA maximum current compared to 75 mA for the original part. This provides 60% additional current capacity, allowing operation at higher current levels if circuit design permits.