UP1B-331-R Equivalent & Substitute Parts Reference

Part Overview

The UP1B-331-R is a 330 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 280 mA continuous current with a maximum DC resistance of 3.1 Ohm 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 no moisture sensitivity restrictions during storage and handling.

The UP1B-331-R is classified as Active product status with full inventory availability. Equivalent and substitute parts are identified based on matching inductance value, core material, shielding configuration, and surface mount packaging, while accommodating variations in current ratings, DC resistance, and operating temperature ranges that remain within acceptable application parameters.

Substiute Parts

UP1B-331-R

Eaton - Electronics DivisionIn Stock: 1145UP1B-331-R Datasheet

Current PartRFQ

SDR0805-331KL

Bourns Inc.In Stock: 52250SDR0805-331KL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the UP1B-331-R is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 330 µH (exact match required)
• Core material: Ferrite (unshielded drum core configuration)
• Mounting type: Surface mount
• Package classification: Nonstandard SMD form factor

Secondary Compatibility Parameters:

• Current rating must equal or exceed 280 mA minimum continuous rating
• Saturation current (Isat) must equal or exceed 310 mA
• DC resistance variation is acceptable provided circuit performance remains within design specifications
• Operating temperature range must encompass or extend the -40°C to 85°C baseline
• RoHS compliance status must be maintained

The SDR0805-331KL from Bourns Inc. satisfies all primary matching criteria and exceeds secondary compatibility thresholds, qualifying it as a direct substitute for the UP1B-331-R in applications where the enhanced electrical performance characteristics are compatible with circuit design requirements.

Parameter Comparison

Engineering Selection Recommendations

UP1B-331-R (Eaton - Electronics Division):

• Primary selection for applications requiring exact component specification
• Active product status with confirmed inventory availability (1059 Pcs)
• RoHS Compliant certification
• Suitable for operating environments up to 85°C

SDR0805-331KL (Bourns Inc.):

• Qualified substitute offering enhanced electrical performance characteristics
• Active product status with substantial inventory availability (52201 Pcs)
• ROHS3 Compliant certification
• Extended operating temperature range to 125°C supports high-temperature applications
• Reduced DC resistance (1.26 Ohm vs 3.1 Ohm) results in lower power dissipation
• Higher current and saturation ratings provide additional design margin
• Tighter inductance tolerance (±10% vs ±20%) supports precision circuit requirements

Selection between these parts depends on application-specific requirements regarding operating temperature, power dissipation constraints, and tolerance specifications. Both parts maintain identical inductance values, core materials, shielding configurations, and surface mount packaging, ensuring mechanical and electrical compatibility within their respective rated parameters.

Frequently Asked Questions (FAQ)

Q: Can the SDR0805-331KL directly replace the UP1B-331-R in existing designs?

A: Yes. Both inductors share identical inductance values (330 µH), ferrite core material, unshielded configuration, and surface mount packaging. The SDR0805-331KL exceeds the UP1B-331-R in current rating (400 mA vs 280 mA) and saturation current (580 mA vs 310 mA), making it electrically compatible. Physical dimensions differ slightly (7.80mm x 7.80mm x 5.30mm vs 8.89mm x 6.10mm x 5.00mm), requiring verification of PCB layout constraints.

Q: What is the significance of the lower DC resistance in the SDR0805-331KL?

A: The SDR0805-331KL exhibits 1.26 Ohm maximum DC resistance compared to 3.1 Ohm maximum in the UP1B-331-R. This 59% reduction in resistance decreases power dissipation (I²R losses) during operation, resulting in lower heat generation and improved efficiency in current-carrying applications.

Q: Are there temperature-related considerations for substitution?

A: The UP1B-331-R operates from -40°C to 85°C, while the SDR0805-331KL extends to -40°C to 125°C. Applications requiring operation above 85°C necessitate the Bourns part. Both parts maintain RoHS compliance across their respective temperature ranges.

Q: How do inductance tolerances affect circuit performance?

A: The UP1B-331-R carries ±20% tolerance, while the SDR0805-331KL offers ±10% tolerance. Tighter tolerance reduces inductance variation across production batches, improving circuit consistency. Applications with strict inductance specifications benefit from the Bourns part's enhanced tolerance.

Q: What packaging considerations apply to these inductors?

A: Both parts are classified as Nonstandard SMD packages in Tape & Reel (TR) format. Physical dimensions differ: UP1B-331-R measures 8.89mm L x 6.10mm W x 5.00mm H; SDR0805-331KL measures 7.80mm L x 7.80mm W x 5.30mm H. PCB footprint verification is required before substitution.

Q: Do both parts meet current environmental compliance standards?

A: Yes. The UP1B-331-R is RoHS Compliant. The SDR0805-331KL is ROHS3 Compliant and REACH Unaffected. Both carry MSL 1 (Unlimited) ratings, indicating no moisture sensitivity restrictions during storage and handling.