18R683C Equivalent & Substitute Parts

Part Overview

The 18R683C is a 68 µH unshielded wirewound inductor manufactured by Murata Power Solutions Inc., rated for 1.35 A with a maximum DC resistance of 70mOhm. 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 mounting configurations are required for applications where the original part is unavailable or inventory constraints necessitate alternative sourcing.

Substiute Parts

18R683C

Murata Power Solutions Inc.In Stock: 87818R683C Datasheet

Current PartRFQ

RLB1314-680KL

Bourns Inc.In Stock: 1821RLB1314-680KL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 18R683C is determined by the following critical parameters:

• Inductance Value: 68 µH (±10% tolerance maintained)
• Current Rating: Minimum 1.2 A (substitute must support the application's current requirements)
• Mounting Configuration: Through-hole radial, vertical cylinder package
• Shielding Type: Unshielded
• Compliance: ROHS3 and REACH compliance status

The RLB1314-680KL qualifies as a substitute based on matching inductance specification, compatible current rating within acceptable operating margins, identical mounting type and package configuration, and equivalent regulatory compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Both the 18R683C and RLB1314-680KL maintain Active product status with full ROHS3 and REACH compliance, ensuring regulatory alignment for current and future applications. The RLB1314-680KL provides an extended operating temperature range (-40°C to 105°C) compared to the 18R683C (0°C to 70°C), offering broader thermal operational capability. The current rating differential (1.35 A versus 1.2 A) and DC resistance variance (70mOhm versus 92mOhm) must be evaluated against specific circuit requirements to ensure performance compatibility within the target application's thermal and electrical constraints.

Frequently Asked Questions (FAQ)

Q: Can the RLB1314-680KL directly replace the 18R683C in all applications?

A: Direct substitution is valid when the application's current requirement does not exceed 1.2 A and the higher DC resistance of 92mOhm (versus 70mOhm) is acceptable for the circuit design. The identical inductance value, tolerance, and through-hole radial package ensure mechanical and electrical compatibility.

Q: What is the significance of the DC resistance difference between these parts?

A: The RLB1314-680KL exhibits 22mOhm higher DC resistance than the 18R683C. This parameter directly affects power dissipation and thermal performance in the inductor. Applications sensitive to resistive losses must account for this differential in thermal and efficiency calculations.

Q: Are there physical dimension considerations for substitution?

A: The 18R683C measures 0.539" diameter with 0.626" seated height, while the RLB1314-680KL measures 0.461" diameter with 0.512" seated height. The substitute part is physically smaller and will fit within the same PCB footprint space allocated for through-hole radial components.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the 18R683C and RLB1314-680KL are ROHS3 compliant and REACH unaffected, ensuring equivalent regulatory status for applications requiring these certifications.