RCH108NP-331K Equivalent & Substitute Parts

Part Overview

The RCH108NP-331K is a 330 µH unshielded drum core wirewound inductor manufactured by Sumida America Components Inc. This through-hole component is rated for 790 mA continuous current with a maximum DC resistance of 690 mOhm. The part is currently active in production and ROHS3 compliant, making it suitable for applications requiring fixed inductance in power conversion, filtering, and signal conditioning circuits.

Substitute parts are identified when equivalent inductance values, core materials, mounting types, and electrical performance parameters align within acceptable tolerances for the application. Alternative sources ensure design flexibility and supply chain continuity.

Substiute Parts

RCH108NP-331K

Sumida America Components Inc.In Stock: 849RCH108NP-331K Datasheet

Current PartRFQ

RL110-331K-RC

Bourns Inc.In Stock: 1682RL110-331K-RC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RCH108NP-331K is determined by the following criteria:

Primary Matching Parameters:

• Inductance value: 330 µH (±10% tolerance)
• Core type: Ferrite drum core, unshielded
• Mounting configuration: Through-hole, radial vertical cylinder with 4 leads
• Package footprint: 0.394" diameter (10.00 mm)

Performance Compatibility Parameters:

• Current rating must equal or exceed 790 mA
• DC resistance must not exceed 690 mOhm
• Operating temperature range must encompass -40°C to 100°C minimum
• Regulatory compliance: ROHS3 compliant

The RL110-331K-RC from Bourns Inc. meets all primary matching parameters and exceeds performance specifications in current rating (930 mA) and DC resistance (520 mOhm Max), while maintaining ferrite drum core construction and through-hole mounting. Height variation (10.50 mm vs. 8.50 mm) remains within typical PCB layout tolerances for radial components.

Parameter Comparison

Engineering Selection Recommendations

RCH108NP-331K Selection Criteria:

• Primary choice when original design specifications require maximum height constraint of 8.50 mm
• Specified in designs with MSL Level 1 moisture sensitivity requirements
• Preferred when sourcing from Sumida America Components Inc. supply chain

RL110-331K-RC Selection Criteria:

• Suitable for applications where the 10.50 mm height accommodates PCB layout
• Recommended when lower DC resistance (520 mOhm vs. 690 mOhm) reduces thermal dissipation requirements
• Applicable when higher current margin (930 mA vs. 790 mA) provides design headroom
• Extended operating temperature range (-40°C to 105°C) supports wider environmental specifications
• ROHS3 compliant and REACH unaffected status confirms regulatory alignment

Both parts maintain identical inductance, tolerance, core material, and mounting configuration. Selection between them depends on physical space constraints and thermal performance requirements specific to the application circuit.

Frequently Asked Questions (FAQ)

Q: Can RL110-331K-RC replace RCH108NP-331K in existing designs without PCB modification?

A: Direct replacement is possible if PCB layout accommodates the 2.00 mm additional height (10.50 mm vs. 8.50 mm). The identical 10.00 mm diameter and radial lead configuration maintain the same footprint. Verify clearance above the component before substitution.

Q: What is the impact of lower DC resistance in the RL110-331K-RC?

A: The RL110-331K-RC exhibits 520 mOhm maximum DC resistance compared to 690 mOhm in the RCH108NP-331K. This 170 mOhm reduction decreases resistive losses and thermal dissipation at rated current, improving efficiency in power conversion applications.

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

A: Both parts are ROHS3 compliant and rated for -40°C to 100°C (RCH108NP-331K) or -40°C to 105°C (RL110-331K-RC) operating ranges. The RL110-331K-RC provides extended temperature margin. Verify specific reliability requirements and qualification standards for your application.

Q: What is the difference in packaging between these parts?

A: RCH108NP-331K is supplied in Tape & Reel (TR) packaging with 745 pieces in stock. RL110-331K-RC is supplied in Bulk packaging with 1654 pieces available. Both are through-hole components with identical lead configurations.

Q: Can these inductors be used interchangeably in filtering applications?

A: Yes, both parts provide 330 µH inductance with ±10% tolerance and ferrite drum core construction. The RL110-331K-RC's higher current rating (930 mA) and lower DC resistance make it suitable for higher-power filtering stages. Verify current requirements and thermal constraints for your specific filtering circuit.

Q: What certifications apply to both parts?

A: Both parts are ROHS3 compliant. The RL110-331K-RC is additionally REACH unaffected. Both carry EAR99 ECCN classification. Confirm compliance requirements for your end-use application and geographic market.