UP4B-221 Equivalent & Substitute Parts Reference

Part Overview

The UP4B-221 is a 220 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division, part of the UNI-PAC™ series. This surface mount component is rated for 1.4 A continuous current with a maximum DC resistance of 357.1 mOhm and operates across the temperature range of -40°C to 85°C.

The UP4B-221 carries an obsolete product status. Identification of equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications utilizing this inductor specification.

Substiute Parts

UP4B-221

Eaton - Electronics DivisionIn Stock: 733UP4B-221 Datasheet

Current PartRFQ

UP4B-221-R

Eaton - Electronics DivisionIn Stock: 2499UP4B-221-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UP4B-221 is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Must Match):

• Inductance value: 220 µH
• Inductance tolerance: ±20%
• Current rating: 1.4 A
• Saturation current (Isat): 2.4 A
• DC resistance: 357.1 mOhm maximum
• Core material: Ferrite
• Shielding configuration: Unshielded

Mechanical Parameters (Must Match):

• Mounting type: Surface Mount
• Physical dimensions: 0.870" L x 0.591" W (22.10mm x 15.00mm)
• Height seated maximum: 0.310" (7.87mm)

Environmental Parameters (Must Match):

• Operating temperature range: -40°C to 85°C
• Moisture sensitivity level: 1 (Unlimited)

Substitute parts must satisfy all electrical, mechanical, and environmental parameters without deviation. Packaging configuration may differ between the main part and substitutes.

Parameter Comparison

Engineering Selection Recommendations

UP4B-221-R is the direct substitute for UP4B-221 based on complete electrical and mechanical parameter equivalence.

Product Status Consideration: The UP4B-221 is classified as obsolete, while UP4B-221-R maintains active product status. Selection of UP4B-221-R ensures access to ongoing manufacturer support and supply chain continuity.

Compliance Consideration: UP4B-221-R is RoHS compliant, whereas UP4B-221 is RoHS non-compliant. Applications subject to RoHS regulatory requirements must utilize UP4B-221-R.

Packaging Consideration: UP4B-221-R is supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes. The original UP4B-221 is supplied in bulk packaging. Packaging selection depends on production methodology and assembly equipment compatibility.

Inventory Availability: UP4B-221-R maintains higher inventory levels (2400 Pcs) compared to UP4B-221 (626 Pcs), supporting improved supply reliability for new production orders.

Frequently Asked Questions (FAQ)

Q: Can UP4B-221-R be used as a direct replacement for UP4B-221 in existing designs?

A: Yes. UP4B-221-R is electrically and mechanically equivalent to UP4B-221 across all specified parameters: 220 µH inductance, 1.4 A current rating, 357.1 mOhm DC resistance, ferrite core material, unshielded configuration, and identical physical dimensions. Direct substitution is supported without circuit modification.

Q: What is the difference between UP4B-221 and UP4B-221-R?

A: The primary differences are product status, RoHS compliance, and packaging format. UP4B-221-R is an active product with RoHS compliance and Tape & Reel packaging, while UP4B-221 is obsolete, RoHS non-compliant, and supplied in bulk packaging. All electrical and mechanical specifications are identical.

Q: Is UP4B-221-R suitable for RoHS-regulated applications?

A: Yes. UP4B-221-R is RoHS compliant and meets regulatory requirements for applications subject to RoHS directives. UP4B-221 is RoHS non-compliant and is not suitable for RoHS-regulated applications.

Q: Does the Tape & Reel packaging of UP4B-221-R affect circuit performance?

A: No. Packaging format does not affect electrical or mechanical performance. Tape & Reel packaging is a supply and assembly format consideration only. Component performance specifications remain identical to bulk-packaged versions.

Q: Are there any frequency-dependent performance differences between UP4B-221 and UP4B-221-R?

A: No. Both parts are tested and specified at 100 kHz inductance frequency. Performance characteristics across the operating temperature range of -40°C to 85°C are equivalent.

Q: What is the saturation current specification, and why is it important?

A: Both UP4B-221 and UP4B-221-R have a saturation current (Isat) of 2.4 A. This specification defines the maximum current level before the inductor core saturates and inductance degrades. The 1.4 A continuous current rating provides a safety margin below saturation.

Q: Can these inductors be used in high-frequency switching applications?

A: These inductors are specified at 100 kHz test frequency. Application suitability at frequencies above or below this specification requires verification against the inductor's frequency response characteristics, which are not provided in this reference.