UP1B-330-R Equivalent & Substitute Parts

Part Overview

The UP1B-330-R is a 33 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division, part of the UNI-PAC™ series. This surface mount component is rated for 820 mA continuous current with a maximum DC resistance of 367 mOhm and operates across the temperature range of -40°C to 85°C. The component is ROHS3 compliant and carries an MSL rating of 1 (Unlimited). Substitute parts are identified when equivalent inductance values, core materials, and mounting technologies are required but original stock availability is limited or alternative performance characteristics better suit specific application requirements.

Substiute Parts

UP1B-330-R

Eaton - Electronics DivisionIn Stock: 2119UP1B-330-R Datasheet

Current PartRFQ

SDR0805-330KL

Bourns Inc.In Stock: 4476SDR0805-330KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UP1B-330-R is determined by the following critical parameters:

Primary Substitution Criteria:

• Inductance value: 33 µH (exact match required)
• Core material: Ferrite drum core, unshielded construction
• Mounting technology: Surface mount, tape and reel packaging
• Current handling capability: Minimum 820 mA continuous rating
• DC resistance: Acceptable range based on application thermal and efficiency requirements
• Compliance: ROHS3 and REACH status alignment

Secondary Compatibility Factors:

• Operating temperature range must encompass or exceed -40°C to 85°C
• Saturation current (Isat) must exceed the application's peak current demands
• Package footprint and height must be compatible with PCB layout constraints
• Inductance tolerance must satisfy circuit performance specifications

The SDR0805-330KL from Bourns Inc. qualifies as a substitute based on matching inductance (33 µH), identical core material (ferrite, unshielded), equivalent mounting technology (surface mount, tape and reel), and superior current handling (1.2 A continuous, 1.9 A saturation). Both components maintain ROHS3 compliance and MSL 1 ratings.

Parameter Comparison

Engineering Selection Recommendations

UP1B-330-R Selection Criteria:

• Applications requiring the original Eaton UNI-PAC™ series specification
• PCB layouts designed for 8.89mm x 6.10mm footprint with 5.00mm maximum height
• Systems operating within -40°C to 85°C temperature envelope
• Designs where 367 mOhm DC resistance is acceptable for thermal and efficiency calculations
• Applications with 820 mA continuous current requirement and 990 mA saturation margin

SDR0805-330KL Selection Criteria:

• Applications benefiting from lower DC resistance (140 mOhm) for reduced power dissipation
• Systems requiring extended operating temperature range to 125°C
• Designs where tighter inductance tolerance (±10%) improves circuit performance
• Applications with higher current demands (1.2 A continuous, 1.9 A saturation)
• PCB layouts compatible with 7.80mm x 7.80mm square footprint and 5.30mm maximum height
• Bourns SDR0805 series standardization across product lines

Both components maintain identical compliance status (ROHS3, REACH Unaffected, MSL 1) and are suitable for direct substitution in applications where the specified parameter differences do not create functional conflicts.

Frequently Asked Questions (FAQ)

Q: Can the SDR0805-330KL directly replace the UP1B-330-R on existing PCBs?

A: Direct replacement requires PCB layout verification. The SDR0805-330KL footprint (7.80mm x 7.80mm square) differs from the UP1B-330-R footprint (8.89mm x 6.10mm rectangular). Height difference is minimal (5.30mm vs. 5.00mm). Pad pattern compatibility must be confirmed before assembly.

Q: What is the significance of the DC resistance difference (367 mOhm vs. 140 mOhm)?

A: Lower DC resistance in the SDR0805-330KL reduces I²R power dissipation. For a 820 mA load, the UP1B-330-R dissipates approximately 247 mW, while the SDR0805-330KL dissipates approximately 94 mW. Application thermal budgets and efficiency requirements determine which component is appropriate.

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

A: The UP1B-330-R operates to 85°C maximum. The SDR0805-330KL extends to 125°C. Applications requiring sustained operation above 85°C must use the SDR0805-330KL or select an alternative component rated for the required temperature.

Q: What does the inductance tolerance difference mean for circuit design?

A: The UP1B-330-R carries ±20% tolerance; the SDR0805-330KL carries ±10% tolerance. Circuits sensitive to inductance variation (resonant frequency, filter response, impedance matching) benefit from the tighter Bourns tolerance. Standard applications typically accommodate ±20% variation.

Q: Are there any compliance or regulatory differences between these parts?

A: Both components are ROHS3 compliant, REACH Unaffected, and carry MSL 1 (Unlimited) ratings. No compliance differentiation exists. Both are suitable for equivalent regulatory environments.

Q: What current rating should be used for design calculations?

A: Use the continuous current rating (820 mA for UP1B-330-R; 1.2 A for SDR0805-330KL) for steady-state thermal calculations. The saturation current (Isat) represents the threshold where inductance begins to degrade; design margins should maintain operating current below this level.

Q: Can these inductors be used interchangeably in the same design revision?

A: Interchangeability requires confirmation that PCB footprint, height clearance, thermal dissipation budget, and inductance tolerance specifications accommodate both components. Engineering review of layout and electrical performance is necessary before implementing either component in production.