Bourns 5730 70µH Toroidal Inductor Equivalent & Substitute Parts

Part Overview

The Bourns 5730 is a 70µH unshielded toroidal inductor rated for 3A continuous current with 50mOhm maximum DC resistance. This through-hole component operates across -55°C to 105°C and is designed for radial, vertical mounting applications. The 5730 is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. Active alternatives with identical or compatible electrical specifications are available from Bourns and other manufacturers.

Substiute Parts

5730

Bourns Inc.In Stock: 8235730 Datasheet

Current PartRFQ

5730-RC

Bourns Inc.In Stock: 7135730-RC Datasheet

DirectRFQ

PE-92104NL

Pulse ElectronicsIn Stock: 1472PE-92104NL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following critical parameters:

Mandatory Match Criteria:

• Inductance value: 70 µH (exact)
• Current rating: 3 A (minimum)
• Mounting type: Through hole
• Package type: Radial, vertical (open)
• Shielding: Unshielded

Acceptable Variation Criteria:

• DC Resistance: Substitute values ≤ 50 mOhm are acceptable
• Tolerance: Tighter tolerances (±15% or better) are acceptable
• Operating temperature: Extended ranges are acceptable
• Product status: Active parts are preferred over obsolete

The Bourns 5730-RC and Pulse Electronics PE-92104NL both satisfy these substitution criteria with identical inductance, current rating, and mounting specifications.

Parameter Comparison

Engineering Selection Recommendations

Bourns 5730-RC is the primary substitute for the obsolete Bourns 5730. Both parts are manufactured by Bourns, share identical electrical specifications (70µH, 3A, 50mOhm DCR, ±15% tolerance), and maintain the same operating temperature range. The 5730-RC is active and ROHS3 compliant. Physical dimensions differ slightly (0.850" vs 0.875" diameter), requiring PCB layout verification for space-constrained applications. Packaging is supplied in trays rather than bulk.

Pulse Electronics PE-92104NL is an alternative substitute meeting all mandatory electrical criteria. DC resistance is marginally higher at 52mOhm (within acceptable tolerance), and inductance tolerance is ±20% versus ±15%. Operating temperature range extends to 130°C, providing broader environmental coverage. Physical dimensions are comparable to the 5730-RC. This part is active and ROHS3 compliant. The PE-92104NL is suitable where the extended temperature range and slightly relaxed tolerance are acceptable.

Both substitutes are electrically and mechanically compatible with the original 5730 specification. Selection between them depends on specific application requirements regarding tolerance, temperature range, and physical board layout constraints.

Frequently Asked Questions (FAQ)

Q: Can the Bourns 5730-RC directly replace the obsolete Bourns 5730?

A: Yes. The 5730-RC is electrically identical to the 5730 across all critical parameters: 70µH inductance, 3A current rating, 50mOhm DCR, ±15% tolerance, and -55°C to 105°C operating range. Physical dimensions differ slightly (0.850" vs 0.875" diameter), requiring verification that PCB layout accommodates the smaller form factor.

Q: What are the key differences between the Bourns 5730-RC and Pulse Electronics PE-92104NL?

A: Both parts meet the core electrical specification of 70µH at 3A. The PE-92104NL has a marginally higher DCR of 52mOhm (versus 50mOhm) and a relaxed tolerance of ±20% (versus ±15%). The PE-92104NL offers an extended operating temperature range to 130°C. Physical dimensions are similar but not identical. Both are active, ROHS3 compliant parts.

Q: Are there physical mounting differences between these substitutes?

A: All three parts use through-hole radial, vertical (open) mounting. Diameter and width dimensions vary slightly: the original 5730 is 0.875" diameter, while both the 5730-RC and PE-92104NL are 0.850" diameter. Width specifications also differ marginally. PCB layout and component spacing must be verified before substitution.

Q: Which substitute is recommended for new designs?

A: The Bourns 5730-RC is recommended for designs requiring exact electrical equivalence to the original 5730. The Pulse Electronics PE-92104NL is suitable where extended temperature range (-40°C to 130°C) is beneficial and the slightly higher DCR and relaxed tolerance are acceptable.

Q: Are both substitutes RoHS compliant?

A: Yes. Both the Bourns 5730-RC and Pulse Electronics PE-92104NL are ROHS3 compliant. The original Bourns 5730 is non-compliant, making these substitutes necessary for applications requiring RoHS certification.

Q: What is the impact of the 2mOhm DCR difference in the PE-92104NL?

A: The PE-92104NL DCR of 52mOhm versus the 50mOhm specification represents a 4% increase in DC resistance. This results in marginally higher power dissipation and heat generation under full 3A load. For most applications, this difference is negligible; however, thermal-sensitive designs should calculate power loss (P = I²R) to confirm acceptability.