RCR108DNP-121L Equivalent & Substitute Parts

Part Overview

The RCR108DNP-121L is a 120 µH shielded inductor manufactured by Sumida America Components Inc., rated for 800 mA continuous current with a maximum DC resistance of 240 mOhm. This through-hole radial component features ferrite core construction and operates across the temperature range of -40°C to 85°C. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Substiute Parts

RCR108DNP-121L

Sumida America Components Inc.In Stock: 997RCR108DNP-121L Datasheet

Current PartRFQ

RCR110DNP-121L

Sumida America Components Inc.In Stock: 782RCR110DNP-121L Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RCR108DNP-121L is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Inductance value: 120 µH at 1 kHz test frequency
• Inductance tolerance: ±15%
• Core material: Ferrite
• Shielding: Shielded construction
• Operating temperature range: -40°C to 85°C

Mechanical Compatibility Criteria:

• Mounting type: Through hole
• Package configuration: Radial
• Physical dimensions: 0.394" diameter (10.00 mm)

Regulatory & Compliance Criteria:

• RoHS3 compliance
• Moisture sensitivity level: 1 (Unlimited)

The RCR110DNP-121L qualifies as a direct substitute based on matching inductance, tolerance, core material, shielding, temperature range, and regulatory compliance. Variations in current rating (990 mA vs. 800 mA), DC resistance (210 mOhm vs. 240 mOhm), and physical height do not preclude substitution when the application current requirement does not exceed 800 mA.

Parameter Comparison

Engineering Selection Recommendations

The RCR110DNP-121L is the qualified substitute for the obsolete RCR108DNP-121L based on the following engineering factors:

Electrical Compatibility: Both components maintain identical inductance values (120 µH) and tolerance specifications (±15%) at the standard test frequency of 1 kHz. The ferrite core construction and shielded design are preserved, ensuring equivalent electromagnetic performance in circuit applications.

Thermal & Environmental Compliance: Both parts operate across the identical temperature range (-40°C to 85°C) and maintain ROHS3 compliance with unlimited moisture sensitivity rating (MSL 1), satisfying regulatory requirements for current and future production.

Current Capacity: The RCR110DNP-121L provides enhanced current rating (990 mA) compared to the main part (800 mA). Applications operating at or below 800 mA experience no derating. Applications requiring current between 800 mA and 990 mA benefit from improved headroom.

DC Resistance Advantage: The substitute part exhibits lower DC resistance (210 mOhm Max vs. 240 mOhm Max), resulting in reduced power dissipation and improved efficiency in current-carrying applications.

Physical Considerations: The substitute part is 2 mm taller (10.50 mm vs. 8.50 mm seated height). PCB layout verification is required to confirm vertical clearance availability in the target application.

Product Status: The RCR110DNP-121L maintains active product status, ensuring long-term availability and supply chain continuity compared to the obsolete main part.

Frequently Asked Questions (FAQ)

Q: Can the RCR110DNP-121L directly replace the RCR108DNP-121L in all applications?

A: Direct substitution is valid when the application current requirement does not exceed 800 mA and vertical PCB clearance accommodates the 10.50 mm seated height of the substitute part. Both components share identical inductance, tolerance, core material, shielding, temperature range, and regulatory compliance.

Q: What is the significance of the current rating difference (800 mA vs. 990 mA)?

A: The RCR110DNP-121L supports higher continuous current. For applications operating at 800 mA or below, both parts perform identically. The substitute part provides additional current capacity margin for applications approaching the 800 mA threshold.

Q: Does the lower DC resistance of the substitute part affect circuit performance?

A: The RCR110DNP-121L exhibits 210 mOhm Max DCR compared to 240 mOhm Max for the main part. Lower resistance reduces I²R power dissipation and heat generation, providing a performance advantage. No circuit redesign is required.

Q: Are there packaging differences between these parts?

A: The RCR108DNP-121L is supplied in standard through-hole radial configuration. The RCR110DNP-121L is supplied in Tape & Reel (TR) packaging format. Both maintain identical radial, vertical cylinder, 4-lead physical configuration suitable for through-hole PCB assembly.

Q: What is the impact of the 2 mm height difference on PCB design?

A: The substitute part measures 10.50 mm seated height versus 8.50 mm for the main part. PCB layout must verify that vertical clearance exists above the component location. If space constraints exist, the main part dimensions must be retained through alternative sourcing channels.

Q: Are both parts RoHS compliant?

A: Yes. Both the RCR108DNP-121L and RCR110DNP-121L are ROHS3 compliant with unlimited moisture sensitivity (MSL 1), meeting current environmental and regulatory requirements.

Q: Why is the main part classified as obsolete?

A: The RCR108DNP-121L is marked obsolete by the manufacturer. The RCR110DNP-121L from the same RCR-D series maintains active product status, ensuring continued availability and supply chain support for equivalent applications.