PM54-121K-RC Equivalent & Substitute Parts

Part Overview

The PM54-121K-RC is a 120 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., designed for surface mount applications. This component is rated for 480 mA continuous current with a maximum saturation current of 600 mA and features a DC resistance of 930 mOhm. The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical and mechanical specifications are maintained across the same inductance value, current rating, and physical package dimensions.

Substiute Parts

PM54-121K-RC

Bourns Inc.In Stock: 751PM54-121K-RC Datasheet

Current PartRFQ

SDR0604-121KL

Bourns Inc.In Stock: 6192SDR0604-121KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PM54-121K-RC is determined by strict equivalence across the following critical parameters:

• Inductance value: 120 µH with ±10% tolerance
• Current rating: 480 mA minimum continuous current capability
• Saturation current: 600 mA minimum
• DC resistance: 930 mOhm specification
• Core type: Ferrite unshielded drum core
• Physical package: 5.80mm x 5.80mm footprint with 4.80mm maximum seated height
• Mounting: Surface mount configuration
• Operating temperature range: -40°C to 125°C minimum

The SDR0604-121KL meets all substitution criteria as a direct equivalent part from the same manufacturer.

Parameter Comparison

Engineering Selection Recommendations

Both PM54-121K-RC and SDR0604-121KL are active production components from Bourns Inc. with full ROHS3 compliance and REACH unaffected status. Selection between these parts is based on availability and supply chain considerations rather than electrical or mechanical differentiation. The SDR0604-121KL series currently maintains higher inventory levels (6100 pcs) compared to the PM54-121K-RC (734 pcs), making it suitable for high-volume procurement scenarios. Both parts satisfy identical regulatory and environmental requirements for applications requiring 120 µH inductance at 480 mA continuous current in surface mount configurations.

Frequently Asked Questions (FAQ)

Q: Can SDR0604-121KL replace PM54-121K-RC in existing designs?

A: Yes. Both parts are electrically and mechanically equivalent across all specified parameters including inductance, current rating, DC resistance, physical dimensions, and operating temperature range. No circuit redesign or PCB layout modification is required.

Q: Are there differences in DC resistance specifications between these parts?

A: The PM54-121K-RC specifies 930 mOhm while the SDR0604-121KL specifies 930 mOhm Max. Both values are equivalent for substitution purposes, as the maximum specification of the substitute part meets the nominal specification of the original part.

Q: Do both parts have identical physical footprints?

A: Yes. Both parts share identical surface mount package dimensions of 5.80mm x 5.80mm with a maximum seated height of 4.80mm, ensuring direct PCB compatibility without layout modifications.

Q: Are regulatory certifications identical?

A: Yes. Both parts carry ROHS3 compliance, REACH unaffected status, and unlimited moisture sensitivity rating (MSL 1), meeting identical regulatory requirements for industrial and commercial applications.

Q: What is the basis for substitution between these two part numbers?

A: Substitution is based on strict equivalence across inductance value (120 µH ±10%), current ratings (480 mA continuous, 600 mA saturation), DC resistance (930 mOhm), ferrite core material, unshielded configuration, physical package dimensions, and operating temperature range (-40°C to 125°C).