UP1B-3R3-R Equivalent & Substitute Parts

Part Overview

The UP1B-3R3-R is a 3.3 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 2.9 A continuous current with a maximum DC resistance of 42.8 mOhm and operates across the temperature range of -40°C to 85°C. The part is RoHS Compliant and carries an MSL rating of 1 (Unlimited), indicating suitability for standard storage and handling conditions. As an active product with 2700 pieces in stock, the UP1B-3R3-R serves applications requiring fixed inductance in compact form factors. Equivalent and substitute parts are identified based on matching inductance value, core material, shielding configuration, and surface mount packaging, with consideration for current rating and DC resistance specifications.

Substiute Parts

UP1B-3R3-R

Eaton - Electronics DivisionIn Stock: 2775UP1B-3R3-R Datasheet

Current PartRFQ

SDR0805-3R3ML

Bourns Inc.In Stock: 12384SDR0805-3R3ML Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UP1B-3R3-R is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 3.3 µH (exact match required)
• Tolerance: ±20% (standard specification)
• Core material: Ferrite (unshielded drum core)
• Mounting type: Surface Mount
• Package configuration: Nonstandard form factor

Secondary Compatibility Factors:

• Current rating must equal or exceed 2.9 A continuous
• DC resistance should not exceed 42.8 mOhm to maintain circuit performance
• Operating temperature range must encompass -40°C to 85°C minimum
• RoHS compliance status must be maintained

The SDR0805-3R3ML from Bourns Inc. meets all primary matching criteria with identical inductance and tolerance specifications. The substitute part exceeds the current rating requirement (4.5 A vs. 2.9 A) and provides lower DC resistance (20 mOhm vs. 42.8 mOhm), resulting in improved thermal performance. Both parts utilize ferrite drum core construction with unshielded configuration and surface mount packaging.

Parameter Comparison

Engineering Selection Recommendations

UP1B-3R3-R Selection: The UP1B-3R3-R remains the primary choice when the original design specification calls for Eaton components or when the exact form factor and thermal characteristics are critical to the application. This part carries RoHS Compliant certification and is actively manufactured with adequate inventory availability (2700 pieces in stock).

SDR0805-3R3ML Selection: The SDR0805-3R3ML from Bourns Inc. is suitable as a substitute when design flexibility permits component manufacturer change. This part offers superior electrical performance through lower DC resistance (20 mOhm vs. 42.8 mOhm) and higher current ratings (4.5 A vs. 2.9 A), resulting in reduced power dissipation and improved thermal margin. The extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C) provides additional environmental flexibility. ROHS3 Compliant certification ensures regulatory compliance. Inventory availability is higher (12300 pieces in stock), supporting supply chain continuity.

Both parts maintain identical inductance specifications, tolerance, core material, shielding configuration, and MSL rating, ensuring functional equivalence in circuit applications requiring 3.3 µH fixed inductance.

Frequently Asked Questions (FAQ)

Q: Can the SDR0805-3R3ML directly replace the UP1B-3R3-R in existing designs?

A: Yes. Both parts share identical inductance (3.3 µH), tolerance (±20%), core material (ferrite), shielding (unshielded), and surface mount packaging. The SDR0805-3R3ML exceeds the current rating and saturation specifications of the UP1B-3R3-R, making it electrically compatible for applications designed around the original part's ratings.

Q: What are the physical dimension differences between these parts?

A: The UP1B-3R3-R measures 0.350" L x 0.240" W x 0.197" H (8.89mm x 6.10mm x 5.00mm). The SDR0805-3R3ML measures 0.307" L x 0.307" W x 0.209" H (7.80mm x 7.80mm x 5.30mm). Both are nonstandard form factors. PCB layout verification is required before substitution to confirm footprint compatibility.

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

A: The SDR0805-3R3ML provides 20 mOhm maximum DC resistance compared to 42.8 mOhm for the UP1B-3R3-R. Lower DC resistance reduces I²R power dissipation and heat generation, improving efficiency and thermal performance in current-carrying applications.

Q: Are both parts suitable for high-temperature applications?

A: The UP1B-3R3-R operates to 85°C maximum. The SDR0805-3R3ML extends to 125°C, providing superior thermal margin for elevated ambient or high-current operating conditions.

Q: What is the significance of the MSL 1 rating for both parts?

A: MSL 1 (Unlimited) indicates these components have unlimited shelf life under standard storage conditions (23°C, 50% relative humidity). No special moisture control or baking procedures are required prior to assembly.

Q: Do both parts carry equivalent compliance certifications?

A: The UP1B-3R3-R is RoHS Compliant. The SDR0805-3R3ML is ROHS3 Compliant, representing a more recent regulatory standard. Both meet current environmental and hazardous substance restrictions for electronic components.