18R104C Equivalent & Substitute Parts

Part Overview

The 18R104C is a 100 µH unshielded wirewound inductor manufactured by Murata Power Solutions Inc., rated for 1.2 A continuous current with a maximum DC resistance of 100mOhm. This through-hole radial component operates across a temperature range of 0°C to 70°C and is classified as Active product status with full RoHS3 compliance. Substitute parts are identified when equivalent inductance values, current ratings, and mechanical compatibility can be maintained within specified tolerance ranges while meeting application requirements.

Substiute Parts

18R104C

Murata Power Solutions Inc.In Stock: 103218R104C Datasheet

Current PartRFQ

RLB1314-101KL

Bourns Inc.In Stock: 4449RLB1314-101KL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 18R104C is determined by the following critical parameters:

• Inductance value must be 100 µH within ±10% tolerance
• Current rating must support minimum 1.2 A continuous operation
• DC resistance must not exceed 100mOhm maximum
• Mounting type must be through-hole compatible
• Package configuration must be radial, vertical cylinder format
• Shielding characteristic must be unshielded
• RoHS3 compliance is required for regulatory alignment

The RLB1314-101KL meets these substitution criteria with matching inductance, compatible current handling, and identical mechanical form factor, though with operational temperature range extension and different core material composition.

Parameter Comparison

Engineering Selection Recommendations

Both the 18R104C and RLB1314-101KL maintain Active product status with full RoHS3 compliance and REACH unaffected designation. Selection between these components should account for the following compliance and operational factors:

The 18R104C operates within a narrower temperature window (0°C to 70°C) compared to the RLB1314-101KL (-40°C to 105°C). Applications requiring extended low-temperature operation below 0°C or sustained high-temperature performance above 70°C necessitate the Bourns substitute.

The RLB1314-101KL exhibits a 1 A current rating versus the 18R104C's 1.2 A rating. Circuits requiring continuous current above 1 A must retain the original Murata component or conduct thermal analysis to confirm the substitute's adequacy within specific duty cycle parameters.

DC resistance differential of 20mOhm between components (100mOhm versus 120mOhm) introduces measurable power dissipation variance in high-current applications. This parameter should be evaluated against thermal budget constraints.

Both components carry identical inductance specifications, tolerance bands, and mechanical form factors, ensuring direct socket compatibility in through-hole PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the RLB1314-101KL replace the 18R104C in all applications?

A: Direct substitution is valid when application current requirements do not exceed 1 A continuous operation and operating temperature remains within -40°C to 105°C. If the circuit demands the full 1.2 A rating of the original component, the RLB1314-101KL may not be suitable without additional thermal analysis.

Q: What is the significance of the 20mOhm DC resistance difference?

A: The RLB1314-101KL's 120mOhm maximum DCR versus the 18R104C's 100mOhm maximum represents increased resistive losses. In applications where the inductor carries sustained current, this difference produces proportionally higher heat dissipation. Power loss differential is calculated as I²R, so at 1 A, the additional loss is approximately 20mW.

Q: Are the physical dimensions compatible for PCB layout?

A: Both components use radial, vertical cylinder packaging with through-hole mounting. The 18R104C measures 0.539" diameter by 0.626" height, while the RLB1314-101KL measures 0.461" diameter by 0.512" height. The substitute is physically smaller and will fit within the same PCB footprint with clearance margin.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the 18R104C and RLB1314-101KL are ROHS3 compliant, REACH unaffected, and classified under identical ECCN and HTSUS codes, ensuring equivalent regulatory standing for procurement and deployment.

Q: What core material difference exists between these inductors?

A: The 18R104C uses standard wirewound construction with unspecified core material. The RLB1314-101KL employs drum core ferrite construction with wirewound topology. Both maintain unshielded configuration and identical inductance specifications at 1 kHz test frequency.