84102C Equivalent & Substitute Parts

Part Overview

The 84102C is a 1 µH unshielded wirewound inductor manufactured by Murata Power Solutions Inc., rated for 2.8 A continuous current with a maximum DC resistance of 80mOhm. This component is classified as Active and fully compliant with ROHS3 and REACH standards. The part is supplied in Tape & Reel packaging with a nonstandard surface mount case measuring 4.50mm × 3.30mm × 2.90mm (height seated maximum).

Equivalent and substitute parts are identified when design requirements permit tolerance in electrical performance parameters while maintaining functional compatibility within the application circuit. Substitutes are selected based on matching inductance value, current rating capability, operating temperature range, and physical mounting compatibility.

Substiute Parts

84102C

Murata Power Solutions Inc.In Stock: 284384102C Datasheet

Current PartRFQ

SDR0403-1R0ML

Bourns Inc.In Stock: 25489SDR0403-1R0ML Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The SDR0403-1R0ML from Bourns Inc. qualifies as a direct substitute for the 84102C based on the following matching parameters:

Inductance value of 1 µH with ±20% tolerance ensures electrical equivalence in circuit operation. Both parts operate across the identical temperature range of -40°C to 125°C. Surface mount configuration and nonstandard package classification provide mechanical compatibility. Both components are unshielded wirewound inductors with ROHS3 compliance and MSL rating of 1 (Unlimited).

The SDR0403-1R0ML provides superior electrical characteristics: current rating of 3.8 A exceeds the 84102C requirement of 2.8 A, and DC resistance of 33mOhm is lower than the 84102C maximum of 80mOhm. These improvements allow the substitute to operate with reduced thermal dissipation and increased current margin in the application circuit.

Parameter Comparison

Engineering Selection Recommendations

Selection between the 84102C and SDR0403-1R0ML is determined by application-specific constraints and component availability.

The 84102C is appropriate when the original design specifies Murata components, when inventory of this part is prioritized, or when the compact height of 2.90mm is a critical board layout requirement.

The SDR0403-1R0ML is appropriate when improved electrical performance is beneficial, when lower DC resistance reduces thermal dissipation in the circuit, when higher current rating provides additional design margin, or when Bourns component qualification is required. Both parts maintain identical compliance certifications: ROHS3 Compliant, REACH Unaffected, and MSL rating of 1 (Unlimited).

Physical dimensions differ slightly: the SDR0403-1R0ML is 0.50mm wider and 0.60mm taller than the 84102C. PCB layout verification is necessary to confirm the substitute fits within the allocated footprint space.

Frequently Asked Questions (FAQ)

Q: Can the SDR0403-1R0ML directly replace the 84102C without circuit modification?

A: Yes. Both inductors have identical inductance values (1 µH) and tolerance (±20%), identical operating temperature range (-40°C to 125°C), and identical shielding classification (unshielded). The SDR0403-1R0ML has superior electrical characteristics with higher current rating and lower DC resistance, making it functionally compatible without circuit changes.

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

A: The SDR0403-1R0ML has 33mOhm maximum DC resistance compared to the 84102C at 80mOhm maximum. Lower DC resistance reduces I²R power dissipation in the inductor. For a 2.8 A application, the 84102C dissipates up to 627 mW while the SDR0403-1R0ML dissipates up to 259 mW. This difference is significant in thermal-sensitive applications.

Q: Are there physical mounting compatibility concerns?

A: Both parts use surface mount technology with nonstandard package classification. The SDR0403-1R0ML is 0.50mm wider (4.00mm vs 3.30mm) and 0.60mm taller (4.60mm vs 2.90mm) than the 84102C. Verify that the PCB footprint and surrounding component placement accommodate these dimensional differences before substitution.

Q: Do both parts have identical compliance certifications?

A: Yes. Both the 84102C and SDR0403-1R0ML are ROHS3 Compliant, REACH Unaffected, and rated MSL 1 (Unlimited). Moisture sensitivity level 1 indicates unlimited shelf life without special storage requirements.

Q: What is the current rating difference and does it matter?

A: The 84102C is rated for 2.8 A continuous current while the SDR0403-1R0ML is rated for 3.8 A. If the application draws 2.8 A or less, both parts are suitable. The higher rating of the SDR0403-1R0ML provides additional design margin and reduces thermal stress at the same current level.