Bourns 5800-121 120µH Axial Inductor Equivalent & Substitute Parts

Part Overview

The Bourns 5800-121 is a 120 µH unshielded drum core wirewound inductor rated for 700 mA continuous current with a maximum DC resistance of 300mOhm. This through-hole axial component operates across the temperature range of -55°C to 105°C and is designed for applications requiring fixed inductance filtering and energy storage in power conversion circuits.

The 5800-121 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for legacy systems utilizing this component.

Substiute Parts

5800-121

Bourns Inc.In Stock: 8785800-121 Datasheet

Current PartRFQ

5800-121-RC

Bourns Inc.In Stock: 14905800-121-RC Datasheet

DirectRFQ

2474-26L

API Delevan Inc.In Stock: 7282474-26L Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Bourns 5800-121 is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 120 µH (exact match required)
• Inductance tolerance: ±10% or tighter
• Current rating: minimum 700 mA continuous
• DC resistance: 300mOhm or lower
• Core material: Ferrite
• Shielding: Unshielded
• Mounting type: Through Hole
• Package: Axial
• Operating temperature range: minimum -55°C to 105°C coverage

Substitute Categories:

Direct Equivalent (Identical Specifications): Part 5800-121-RC from Bourns Inc. matches all electrical and mechanical parameters of the original 5800-121, with the primary distinction being active product status and improved RoHS3 compliance. This part is a direct replacement suitable for all applications where the 5800-121 was originally specified.

Compatible Substitute (Parameter Variance Allowed): Part 2474-26L from API Delevan Inc. shares the same 120 µH inductance value and ferrite core construction but exhibits parameter variations in current rating (1.12 A vs. 700 mA), DC resistance (283mOhm vs. 300mOhm), saturation current (580mA vs. 1A), inductance tolerance (±15% vs. ±10%), and operating temperature range (-55°C to 125°C vs. -55°C to 105°C). The 2474-26L is suitable for applications where the higher current rating and lower DC resistance provide performance benefits, provided the ±15% tolerance is acceptable to the circuit design.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred): Select Bourns 5800-121-RC when the original 5800-121 is no longer available. This part maintains identical electrical specifications and mechanical form factor while offering active product status and ROHS3 compliance. The 5800-121-RC is the recommended choice for new production runs and system upgrades where regulatory compliance is required.

For Compatible Substitution: Select API Delevan 2474-26L when design flexibility permits tolerance of parameter variations. This part is suitable for applications where the higher current rating (1.12 A) and lower DC resistance (283mOhm) provide circuit performance advantages. The ±15% inductance tolerance and extended operating temperature range (-55°C to 125°C) must be verified as acceptable within the target application's design margins. The molded construction and slightly different physical dimensions (0.240" Dia x 0.740" L) require PCB layout verification for mechanical fit.

Compliance Considerations: The 5800-121-RC is the only substitute offering ROHS3 compliance. Applications subject to RoHS regulations should prioritize this part. Both the original 5800-121 and 2474-26L are RoHS non-compliant and should be evaluated against applicable regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the 5800-121-RC be used as a direct replacement for the 5800-121?

A: Yes. The 5800-121-RC is electrically and mechanically identical to the 5800-121, with the same inductance (120 µH), current rating (700 mA), DC resistance (300mOhm Max), and physical dimensions (0.275" Dia x 0.700" L). The primary differences are active product status and ROHS3 compliance. No circuit modifications are required.

Q: What are the key differences between the 5800-121 and the 2474-26L?

A: The 2474-26L differs in inductance tolerance (±15% vs. ±10%), current rating (1.12 A vs. 700 mA), DC resistance (283mOhm vs. 300mOhm), saturation current (580mA vs. 1A), operating temperature range (-55°C to 125°C vs. -55°C to 105°C), construction type (molded vs. drum core wirewound), and physical dimensions (0.240" Dia x 0.740" L vs. 0.275" Dia x 0.700" L). Both maintain the same 120 µH inductance value and ferrite core material.

Q: Is the 2474-26L suitable for all applications using the 5800-121?

A: The 2474-26L is suitable only when the circuit design accommodates the parameter variations. The higher current rating and lower DC resistance are generally beneficial. However, the ±15% inductance tolerance (versus ±10%) and different physical dimensions require verification. Applications with tight inductance tolerances or space constraints may not be compatible.

Q: What is the impact of the different inductance tolerances?

A: The 5800-121 and 5800-121-RC specify ±10% tolerance, while the 2474-26L specifies ±15%. In a 120 µH application, this represents a tolerance band of ±12 µH (5800-121/RC) versus ±18 µH (2474-26L). Circuit designs dependent on precise inductance values must account for this wider tolerance range when using the 2474-26L.

Q: Will the 2474-26L fit in the same PCB footprint as the 5800-121?

A: The 2474-26L has slightly different physical dimensions (0.240" Dia x 0.740" L) compared to the 5800-121 (0.275" Dia x 0.700" L). While both are axial through-hole components, the diameter is smaller and the length is slightly longer. PCB layout verification is required to confirm mechanical fit within the existing footprint.

Q: Which substitute part should be selected for new designs?

A: The 5800-121-RC is the recommended choice for new designs. It provides identical electrical and mechanical specifications to the original 5800-121 while offering active product status and ROHS3 compliance. The 2474-26L should be considered only when its parameter variations provide specific circuit advantages and design flexibility permits tolerance of the differences.