RL855-100M-RC Equivalent & Substitute Parts

Part Overview

The RL855-100M-RC is a 10 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 2.5 A continuous current with a maximum DC resistance of 70mOhm. This through-hole radial component operates across a temperature range of -30°C to 100°C and is designed for applications requiring fixed inductance in compact form factors.

The RL855-100M-RC is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this component.

Substiute Parts

RL855-100M-RC

Bourns Inc.In Stock: 788RL855-100M-RC Datasheet

Current PartRFQ

744772100

Würth ElektronikIn Stock: 2125744772100 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RL855-100M-RC is determined by the following critical parameters:

• Inductance Value: Must be 10 µH (primary electrical requirement)
• Current Rating: Substitute must support minimum 2.5 A; higher ratings are acceptable
• DC Resistance: Lower or equal DCR values are preferred to maintain efficiency
• Core Type & Shielding: Ferrite, unshielded drum core construction
• Mounting & Package: Through-hole radial configuration with vertical cylinder form factor
• Operating Temperature Range: Must encompass or exceed -30°C ~ 100°C
• Compliance: RoHS3 compliance required for modern supply chains

The Würth Elektronik 744772100 qualifies as a direct substitute based on matching inductance, core type, mounting style, and package configuration, while offering improved electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The Würth Elektronik 744772100 is the qualified substitute for the obsolete RL855-100M-RC based on the following engineering criteria:

Electrical Compatibility: Both components share identical 10 µH inductance values and matching core construction. The 744772100 provides superior current handling (4.2 A versus 2.5 A) and lower DC resistance (40mOhm versus 70mOhm), making it suitable for the original application with improved thermal performance.

Mechanical Compatibility: Identical package dimensions (0.307" diameter, radial through-hole configuration) ensure direct board-level substitution without layout modifications.

Compliance & Availability: The 744772100 maintains ROHS3 compliance and is classified as active product status, ensuring long-term supply chain availability and regulatory alignment. The original RL855-100M-RC is obsolete, making substitution necessary for ongoing production support.

Temperature Performance: The 744772100 extends the operating temperature range to -40°C ~ 125°C, providing broader environmental coverage than the original specification of -30°C ~ 100°C.

Frequently Asked Questions (FAQ)

Q: Can the 744772100 be used as a direct replacement for the RL855-100M-RC?

A: Yes. Both components share identical inductance (10 µH), core type (ferrite unshielded drum core), and package configuration (radial through-hole). The 744772100 meets or exceeds all critical electrical parameters of the original part.

Q: What are the key differences between these two inductors?

A: The 744772100 offers improved specifications: higher current rating (4.2 A vs. 2.5 A), lower DC resistance (40mOhm vs. 70mOhm), tighter inductance tolerance (±15% vs. ±20%), and extended operating temperature range (-40°C ~ 125°C vs. -30°C ~ 100°C).

Q: Are there any physical dimension differences that would affect PCB layout?

A: No. Both components have identical diameter (0.307" / 7.80mm) and radial through-hole mounting. The 744772100 has a slightly greater seated height (0.394" vs. 0.217"), but this does not affect standard through-hole board placement.

Q: Do both parts meet current compliance requirements?

A: Yes. Both the RL855-100M-RC and 744772100 are ROHS3 compliant and REACH unaffected, meeting modern regulatory standards.

Q: Why is the RL855-100M-RC listed as obsolete?

A: The RL855-100M-RC is no longer in active production by Bourns Inc. The 744772100 from Würth Elektronik provides equivalent functionality with enhanced performance characteristics and active product status.