Bourns 5518-RC 50µH Wirewound Inductor Equivalent & Substitute Parts

Part Overview

The Bourns 5518-RC is a 50µH unshielded drum core wirewound inductor rated for 10.5A continuous current with a maximum DC resistance of 20mOhm. This through-hole radial component operates across the temperature range of -55°C to 105°C and is ROHS3 compliant. The 5518-RC is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity.

Substiute Parts

5518-RC

Bourns Inc.In Stock: 12085518-RC Datasheet

Current PartRFQ

1538M18

Hammond ManufacturingIn Stock: 10251538M18 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5518-RC is determined by strict equivalence across the following critical parameters:

• Inductance value: 50 µH
• Current rating: 10.5 A minimum
• DC resistance: 20 mOhm maximum
• Mounting type: Through hole
• Package configuration: Radial, horizontal cylinder
• Physical dimensions: 0.940" Dia x 1.380" L
• Shielding: Unshielded
• Inductance measurement frequency: 1 kHz
• Regulatory compliance: ROHS3 compliant

The Hammond Manufacturing 1538M18 meets all substitution criteria. While the 1538M18 specifies a tighter inductance tolerance (±10% versus ±20%), this represents an improvement in performance specification and does not restrict substitutability.

Parameter Comparison

Engineering Selection Recommendations

The Hammond Manufacturing 1538M18 is the direct active equivalent for the obsolete Bourns 5518-RC. Both components maintain identical electrical specifications for inductance, current rating, and DC resistance, with matching physical dimensions and through-hole radial configuration. The 1538M18 offers the advantage of active product status, ensuring continued availability and supply chain support. Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for current applications.

Frequently Asked Questions (FAQ)

Q: Can the Hammond 1538M18 be used as a direct replacement for the Bourns 5518-RC in existing designs?

A: Yes. Both components share identical inductance (50µH), current rating (10.5A), DC resistance (20mOhm max), physical dimensions (0.940" Dia x 1.380" L), and mounting configuration (through-hole radial). The tighter tolerance specification of the 1538M18 (±10% versus ±20%) represents improved performance.

Q: What is the significance of the inductance tolerance difference between these parts?

A: The 5518-RC specifies ±20% tolerance while the 1538M18 specifies ±10% tolerance. The 1538M18's tighter tolerance provides greater inductance value consistency and does not restrict its use as a substitute.

Q: Are there any compliance or regulatory differences between these parts?

A: Both the 5518-RC and 1538M18 are ROHS3 compliant and REACH unaffected. No compliance barriers exist for substitution.

Q: Why is the Bourns 5518-RC classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The Hammond 1538M18 maintains active product status with ongoing manufacturing support.

Q: Do these inductors have identical physical footprints?

A: Yes. Both components are packaged as radial, horizontal cylinders with dimensions of 0.940" diameter by 1.380" length (23.88mm x 35.05mm), ensuring identical PCB layout compatibility.