UP4B-3R3-R Equivalent & Substitute Parts

Part Overview

The UP4B-3R3-R is a 3.3 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 11 A continuous current with a maximum DC resistance of 5.7 mOhm and operates across the temperature range of -40°C to 85°C. The part is RoHS Compliant and carries an Active product status. Substitute parts are identified when equivalent electrical and mechanical parameters are available from alternative manufacturers, enabling procurement flexibility and supply chain continuity.

Substiute Parts

UP4B-3R3-R

Eaton - Electronics DivisionIn Stock: 1682UP4B-3R3-R Datasheet

Current PartRFQ

P1252.332NLT

Pulse ElectronicsIn Stock: 2299P1252.332NLT Datasheet

DirectRFQ

SDR2207-3R3ML

Bourns Inc.In Stock: 1336SDR2207-3R3ML Datasheet

DirectRFQ

P1252.332NL

Pulse ElectronicsIn Stock: 1964P1252.332NL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UP4B-3R3-R are classified based on matching the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Inductance value: 3.3 µH at 100 kHz test frequency
• Inductance tolerance: ±20%
• Shielding configuration: Unshielded
• Current rating: Minimum 9 A (acceptable for applications requiring up to 11 A with thermal derating considerations)
• DC resistance: Maximum 8.6 mOhm (acceptable variance from 5.7 mOhm baseline)
• Saturation current: Minimum 17 A

Mechanical Compatibility Criteria:

• Mounting type: Surface Mount
• Package classification: Nonstandard
• Physical dimensions: Within ±0.05" tolerance for length and width; height variation acceptable within ±0.02"
• Moisture sensitivity: MSL 1 or equivalent

Regulatory Compliance:

• RoHS compliance status (RoHS Compliant or ROHS3 Compliant acceptable)
• ECCN and HTSUS classifications match

Substitute parts meeting these criteria enable direct replacement in circuit designs where the UP4B-3R3-R is specified, subject to thermal and current derating analysis for parts with lower current ratings.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Highest Compatibility):

The P1252.332NLT (Pulse Electronics) and SDR2207-3R3ML (Bourns Inc.) are classified as direct manufacturer substitutes. Both parts maintain the 3.3 µH inductance value, ±20% tolerance, unshielded configuration, and surface mount nonstandard package dimensions within acceptable mechanical tolerances. Both carry ROHS3 Compliant status and MSL 1 ratings, meeting regulatory requirements equivalent to the primary part.

The SDR2207-3R3ML offers the closest electrical performance to the UP4B-3R3-R with a 9 A current rating and 7.8 mOhm maximum DC resistance. This part is suitable for applications where the full 11 A rating of the primary part is not required, or where thermal derating is acceptable. The ferrite drum core construction matches the primary part's core technology.

The P1252.332NLT provides a 10 A current rating with 8.6 mOhm maximum DC resistance. The wirewound construction differs from the primary part's drum core design but maintains electrical equivalence within the specified tolerance band. This part supports an extended operating temperature range to 130°C, providing thermal margin beyond the primary part's 85°C maximum.

Similar Substitute (Packaging Variation):

The P1252.332NL (Pulse Electronics) is electrically identical to the P1252.332NLT but lacks specified packaging information. This part carries the same electrical ratings (10 A, 8.6 mOhm DCR) and regulatory compliance (ROHS3, MSL 1). Selection of this part requires confirmation of packaging format compatibility with assembly processes.

Current Rating Derating Consideration:

Applications requiring the full 11 A continuous current rating of the UP4B-3R3-R should prioritize the primary part or evaluate thermal derating for substitute parts with 9 A or 10 A ratings. Saturation current margins remain adequate across all substitute options (minimum 17 A saturation current versus 20.2 A for the primary part).

Temperature Range Consideration:

The primary part operates to 85°C maximum. Substitute parts from Pulse Electronics and Bourns extend operation to 130°C and 125°C respectively, providing additional thermal headroom for high-temperature applications.

Frequently Asked Questions (FAQ)

Q: Can the P1252.332NLT replace the UP4B-3R3-R in all applications?

A: The P1252.332NLT is electrically equivalent for inductance value, tolerance, and shielding configuration. The 10 A current rating is lower than the primary part's 11 A rating. Applications operating at or near 11 A continuous current require thermal analysis to confirm acceptable derating. The extended temperature range to 130°C provides additional operational margin in high-temperature environments.

Q: What is the difference between the drum core and wirewound constructions in the substitute parts?

A: The UP4B-3R3-R and SDR2207-3R3ML use drum core ferrite construction. The P1252.332NLT and P1252.332NL use wirewound construction. Both constructions achieve the specified 3.3 µH inductance and ±20% tolerance. Wirewound designs typically exhibit higher DC resistance (8.6 mOhm versus 5.7 mOhm for the primary part), which may increase power dissipation in high-current applications. Drum core designs generally provide lower DC resistance and higher current capacity.

Q: Are all substitute parts available in Tape & Reel packaging?

A: The UP4B-3R3-R, P1252.332NLT, and SDR2207-3R3ML are confirmed available in Tape & Reel (TR) packaging. The P1252.332NL packaging format is not specified in available data and requires confirmation before procurement for automated assembly processes.

Q: What is the significance of the MSL 1 rating across all parts?

A: MSL 1 (Moisture Sensitivity Level 1) indicates unlimited shelf life without moisture control requirements. All listed parts carry this rating, eliminating moisture-related handling and storage constraints during manufacturing and assembly.

Q: How do the DC resistance values affect circuit performance?

A: The primary part UP4B-3R3-R specifies 5.7 mOhm maximum DC resistance. Substitute parts range from 7.8 mOhm (SDR2207-3R3ML) to 8.6 mOhm (P1252.332NLT and P1252.332NL). Higher DC resistance increases resistive losses and heat generation proportional to I²R. For applications carrying 10-11 A continuous current, the additional 1.1-3.1 mOhm resistance may produce measurable thermal effects. Circuit thermal analysis is recommended when substituting with higher DCR parts in high-current designs.

Q: Can the SDR2207-3R3ML be used in place of the UP4B-3R3-R despite the lower 9 A rating?

A: The SDR2207-3R3ML is suitable for applications where continuous current does not exceed 9 A. For applications requiring 9-11 A operation, thermal derating calculations must confirm that the part's saturation current (17 A) and thermal characteristics remain within acceptable limits. The ferrite drum core construction and lower DC resistance (7.8 mOhm) of the SDR2207-3R3ML provide performance advantages in lower-current applications.

Q: What compliance certifications are relevant for these parts?

A: All parts carry RoHS compliance status (RoHS Compliant or ROHS3 Compliant), meeting EU Directive 2011/65/EU requirements. REACH compliance status is confirmed as "REACH Unaffected" for substitute parts where specified. ECCN classification EAR99 and HTSUS code 8504.50.4000 apply uniformly across all parts, indicating standard commercial inductor classification for export control and tariff purposes.