18R685C Equivalent & Substitute Parts

Part Overview

The 18R685C is a 6.8 mH unshielded wirewound inductor manufactured by Murata Power Solutions Inc., rated for 150 mA maximum current with 7 Ohm maximum DC resistance. This component is classified as Active product status and is RoHS3 compliant. 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

18R685C

Murata Power Solutions Inc.In Stock: 112718R685C Datasheet

Current PartRFQ

RLB1314-682KL

Bourns Inc.In Stock: 2109RLB1314-682KL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 18R685C is determined by the following critical parameters:

• Inductance value of 6.8 mH within ±10% tolerance
• Unshielded construction
• Through-hole radial mounting configuration
• Vertical cylinder package geometry
• RoHS3 compliance status

The RLB1314-682KL from Bourns Inc. meets these core substitution criteria. While the current rating (120 mA) is lower than the primary part (150 mA) and DC resistance (9.4 Ohm Max) is higher than the primary part (7 Ohm Max), the inductance value, tolerance, shielding type, mounting method, and package configuration remain equivalent. Component selection must account for these parameter differences in circuit design.

Parameter Comparison

Engineering Selection Recommendations

Both the 18R685C and RLB1314-682KL maintain Active product status and RoHS3 compliance. The RLB1314-682KL provides an extended operating temperature range (-40°C to 105°C) compared to the primary part (0°C to 70°C). Selection between these components depends on circuit current requirements and thermal operating conditions. The 18R685C supports higher current operation at 150 mA, while the RLB1314-682KL is rated for 120 mA maximum current. DC resistance differences (7 Ohm versus 9.4 Ohm) will affect power dissipation characteristics in the application circuit.

Frequently Asked Questions (FAQ)

Q: Can the RLB1314-682KL replace the 18R685C in all applications?

A: Substitution is valid when circuit current requirements do not exceed 120 mA and the higher DC resistance (9.4 Ohm Max versus 7 Ohm Max) is acceptable for the application. Both components share identical inductance values, tolerance, shielding type, and through-hole radial mounting configuration.

Q: What are the physical dimension differences between these parts?

A: The 18R685C has a diameter of 0.539" (13.70 mm) and seated height of 0.626" (15.90 mm). The RLB1314-682KL has a smaller diameter of 0.461" (11.70 mm) and seated height of 0.512" (13.00 mm). Both maintain radial, vertical cylinder package geometry suitable for through-hole PCB mounting.

Q: How do the operating temperature ranges differ?

A: The 18R685C operates from 0°C to 70°C, while the RLB1314-682KL operates from -40°C to 105°C. The RLB1314-682KL provides broader temperature coverage for applications requiring extended thermal operating conditions.

Q: Are both parts RoHS3 compliant?

A: Yes, both the 18R685C and RLB1314-682KL are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.