Bourns 2121-H 560µH Toroidal Inductor Equivalent & Substitute Parts

Part Overview

The Bourns 2121-H is a 560µH unshielded toroidal inductor rated for 1.5A continuous current with a maximum DC resistance of 300mOhm. This through-hole component operates across the temperature range of -55°C to 105°C and is part of the 2100 series. The 2121-H has reached obsolete product status, making identification of active equivalent parts essential for ongoing design support and procurement continuity.

Substiute Parts

2121-H

Bourns Inc.In Stock: 7062121-H Datasheet

Current PartRFQ

2121-H-RC

Bourns Inc.In Stock: 16202121-H-RC Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Bourns 2121-H is determined by strict equivalence across the following critical parameters:

• Inductance value: 560 µH
• Inductance tolerance: ±15%
• Current rating: 1.5 A minimum
• DC resistance: 300 mOhm maximum
• Inductor type: Toroidal
• Shielding configuration: Unshielded
• Mounting method: Through Hole
• Physical package: Radial, Horizontal (Open)
• Operating temperature range: -55°C to 105°C minimum
• Inductance measurement frequency: 1 kHz

The substitute part 2121-H-RC maintains identical electrical and mechanical specifications to the main part, with the primary distinction being product status and compliance certification.

Parameter Comparison

Engineering Selection Recommendations

The 2121-H-RC is the direct active equivalent for the obsolete 2121-H. Both parts share identical electrical specifications and physical dimensions, ensuring direct functional compatibility in circuit applications.

The 2121-H-RC offers the advantage of active product status with ROHS3 compliance certification, whereas the 2121-H is obsolete and RoHS non-compliant. For new designs or ongoing production requiring regulatory compliance with modern environmental standards, the 2121-H-RC is the appropriate selection.

Both parts maintain REACH Unaffected status and carry the same ECCN (EAR99) and HTSUS (8504.50.4000) classifications.

Frequently Asked Questions (FAQ)

Q: Can the 2121-H-RC be used as a direct replacement for the 2121-H?

A: Yes. The 2121-H-RC is electrically and mechanically identical to the 2121-H across all specified parameters, including inductance, current rating, DC resistance, physical dimensions, and operating temperature range. Direct substitution is supported without circuit modification.

Q: What is the primary difference between these two parts?

A: The 2121-H-RC is an active product with ROHS3 compliance, while the 2121-H is obsolete and RoHS non-compliant. The 2121-H-RC is supplied in bulk packaging, whereas the 2121-H uses standard packaging.

Q: Are there any compliance considerations when switching from 2121-H to 2121-H-RC?

A: The 2121-H-RC carries ROHS3 compliance certification, making it suitable for applications subject to RoHS regulations. The 2121-H does not meet RoHS requirements. Both parts maintain REACH Unaffected status.

Q: Do these inductors have identical physical footprints?

A: Yes. Both the 2121-H and 2121-H-RC share identical dimensions: 0.860" diameter (21.84mm) with a maximum seated height of 0.450" (11.43mm). Both use radial, horizontal (open) through-hole mounting.

Q: What inductance tolerance should be expected?

A: Both parts carry an inductance tolerance of ±15% at the 1 kHz test frequency, with a nominal value of 560 µH.

Q: Are there any current or thermal limitations?

A: Both parts are rated for 1.5A continuous current with a maximum DC resistance of 300 mOhm. Operating temperature range is -55°C to 105°C for both variants.