Bourns 5718 Equivalent & Substitute Parts

Part Overview

The Bourns 5718 is a 1.1 mH unshielded toroidal inductor rated for 2.5 A with a maximum DC resistance of 330 mOhm. This through-hole component features an iron powder core and operates across the temperature range of -55°C to 105°C. The 5718 is classified as obsolete, making identification of compatible alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

5718

Bourns Inc.In Stock: 8245718 Datasheet

Current PartRFQ

5718-RC

Bourns Inc.In Stock: 7435718-RC Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The Bourns 5718-RC qualifies as a direct substitute based on electrical and mechanical parameter equivalence. Substitution is valid when the following criteria are met:

• Inductance value matches: 1.1 mH
• Inductance tolerance is identical: ±15%
• Current rating is equal or greater: 2.5 A
• DC resistance does not exceed specification: 330 mOhm Max
• Core material is identical: Iron Powder
• Shielding configuration matches: Unshielded
• Mounting type is compatible: Through Hole
• Package configuration is compatible: Radial, Vertical (Open)
• Operating temperature range encompasses or matches: -55°C to 105°C
• Inductance test frequency is consistent: 1 kHz

The 5718-RC maintains all electrical specifications while offering improved product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The Bourns 5718-RC is the direct equivalent for the obsolete Bourns 5718. All electrical and mechanical parameters are identical, ensuring functional compatibility in existing circuit designs. The 5718-RC offers two significant advantages: active product status ensures ongoing availability and supply chain support, and ROHS3 compliance satisfies modern regulatory requirements where the original 5718 does not.

Selection of the 5718-RC is appropriate for new designs and replacement applications where the 5718 is no longer procurable. No circuit redesign or component re-qualification is required when substituting the 5718-RC for the 5718.

Frequently Asked Questions (FAQ)

Q: Can the 5718-RC be used as a direct replacement for the 5718 in existing designs?

A: Yes. The 5718-RC maintains identical electrical specifications (1.1 mH inductance, 2.5 A current rating, 330 mOhm DC resistance) and mechanical configuration (through-hole, radial vertical package). No circuit modifications are necessary.

Q: What is the primary reason to transition from the 5718 to the 5718-RC?

A: The 5718 is classified as obsolete, creating procurement risk. The 5718-RC is an active product with identical specifications, ensuring long-term availability and supply continuity.

Q: Are there compliance differences between the two parts?

A: Yes. The 5718-RC is ROHS3 compliant, while the 5718 is RoHS non-compliant. This distinction is relevant for applications subject to RoHS regulations.

Q: Do the physical dimensions differ between the 5718 and 5718-RC?

A: Yes. The 5718 measures 0.875" diameter × 0.437" width (22.22mm × 11.10mm), while the 5718-RC measures 1.812" diameter × 0.750" width (46.02mm × 19.05mm). PCB layout and mechanical clearance must accommodate the larger footprint of the 5718-RC.

Q: Are the packaging options different?

A: The 5718 is supplied in standard packaging, while the 5718-RC is supplied in bulk packaging. This affects procurement quantities and handling but does not impact electrical or mechanical performance.

Q: What inventory levels are available?

A: The 5718 has 738 pieces in stock, and the 5718-RC has 676 pieces in stock. Availability should be confirmed with the supplier for specific procurement timelines.