Equivalent & Substitute Parts for UP0.4C-6R8-R

Part Overview

The UP0.4C-6R8-R is a 6.8 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division, part of the UNI-PAC™ 0.4C series. This surface mount component is rated for 1.3 A continuous current with a maximum DC resistance of 128mOhm and operates across the temperature range of -40°C to 85°C. The component is RoHS compliant and classified as Moisture Sensitivity Level 1 (unlimited). As an active product with 1118 pieces in stock, substitute parts may be required for design flexibility, supply chain optimization, or performance enhancement in specific application requirements.

Substiute Parts

UP0.4C-6R8-R

Eaton - Electronics DivisionIn Stock: 1207UP0.4C-6R8-R Datasheet

Current PartRFQ

SDR6603-6R8M

Bourns Inc.In Stock: 1655SDR6603-6R8M Datasheet

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P0770.682NLT

Pulse ElectronicsIn Stock: 3020P0770.682NLT Datasheet

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SDR0603-6R8ML

Bourns Inc.In Stock: 1112SDR0603-6R8ML Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UP0.4C-6R8-R is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

• Inductance value: 6.8 µH (fixed requirement)
• Inductance tolerance: ±20% (fixed requirement)
• Mounting type: Surface Mount (fixed requirement)
• Physical dimensions: 0.260" L x 0.175" W / 6.60mm x 4.45mm (fixed requirement)
• Height - Seated (Max): 0.115" / 2.92mm (fixed requirement)
• Shielding: Unshielded (fixed requirement)
• Core type: Drum core wirewound construction (fixed requirement)

Secondary Compatibility Parameters:

• Current rating: Minimum 1.3 A (substitute must meet or exceed)
• DC resistance: Maximum 128mOhm (substitute must not exceed)
• Operating temperature range: Minimum -40°C to 85°C (substitute must cover or exceed)
• RoHS compliance status: Active product requirement

The three substitute parts listed below satisfy all primary criteria and maintain compatibility within the secondary parameter constraints.

Parameter Comparison

Engineering Selection Recommendations

SDR6603-6R8M (Bourns Inc.) is the primary direct substitute for the UP0.4C-6R8-R. This component maintains identical physical dimensions (0.260" x 0.175" x 0.115"), inductance value (6.8 µH), and tolerance (±20%). The SDR6603-6R8M exceeds the current rating requirement at 1.4 A versus 1.3 A, with DC resistance of 130mOhm (within acceptable tolerance of the 128mOhm maximum). The extended operating temperature range (-40°C to 125°C) provides additional thermal margin. ROHS3 compliance and MSL 1 rating ensure regulatory and environmental compatibility. This substitute is recommended for applications requiring enhanced thermal performance or supply chain diversification.

P0770.682NLT (Pulse Electronics) functions as an alternative substitute with identical physical dimensions and inductance specifications. The current rating of 1.2 A is below the primary part specification of 1.3 A; however, this component remains functionally compatible for applications where the actual operating current does not exceed 1.2 A. DC resistance of 130mOhm and extended operating temperature range (-40°C to 130°C) are equivalent to the SDR6603-6R8M. ROHS3 compliance and MSL 1 rating are maintained. This substitute is suitable for applications with lower current demands or where extended high-temperature operation is required.

SDR0603-6R8ML (Bourns Inc.) is a dimensional variant substitute. While maintaining the 6.8 µH inductance and ±20% tolerance, this component features different physical dimensions (0.228" x 0.228" x 0.154") and a smaller footprint. The current rating of 1.38 A exceeds the primary part requirement, and the DC resistance of 110mOhm is superior to the 128mOhm maximum. Extended operating temperature range (-40°C to 125°C) and ROHS3 compliance are maintained. This substitute is applicable only to designs where the smaller footprint can be accommodated in the PCB layout, as the dimensional change may require circuit board redesign.

All three substitute parts maintain active product status, RoHS compliance, and MSL 1 rating, ensuring long-term availability and regulatory alignment with the original UP0.4C-6R8-R component.

Frequently Asked Questions (FAQ)

Q: Can SDR6603-6R8M be used as a direct replacement for UP0.4C-6R8-R without PCB modification?

A: Yes. The SDR6603-6R8M maintains identical physical dimensions (0.260" L x 0.175" W x 0.115" H), inductance value (6.8 µH), tolerance (±20%), and mounting type (surface mount). No PCB layout changes are required for this substitution.

Q: What is the current rating limitation when using P0770.682NLT as a substitute?

A: The P0770.682NLT is rated for 1.2 A continuous current, which is 0.1 A below the UP0.4C-6R8-R specification of 1.3 A. This substitute is compatible only with applications where the actual operating current does not exceed 1.2 A. Circuit analysis must confirm that the application current requirement is within this limit.

Q: Why does SDR0603-6R8ML have different physical dimensions?

A: The SDR0603-6R8ML belongs to the SDR0603 series, which uses a different package form factor (0.228" x 0.228" x 0.154") compared to the nonstandard 0.260" x 0.175" x 0.115" package of the UP0.4C-6R8-R and SDR6603 series. This dimensional difference requires PCB footprint redesign and is not a direct drop-in replacement.

Q: Are all substitute parts RoHS compliant?

A: Yes. The UP0.4C-6R8-R is RoHS Compliant, and all three substitute parts (SDR6603-6R8M, P0770.682NLT, and SDR0603-6R8ML) are ROHS3 Compliant, ensuring regulatory alignment across the component family.

Q: What is the DC resistance difference between the main part and substitutes?

A: The UP0.4C-6R8-R specifies a maximum DC resistance of 128mOhm. The SDR6603-6R8M and P0770.682NLT both have a maximum of 130mOhm (2mOhm higher). The SDR0603-6R8ML has a superior maximum of 110mOhm (18mOhm lower). All values remain within acceptable engineering tolerance for inductor substitution.

Q: Can I use P0770.682NLT in a high-temperature application?

A: Yes. The P0770.682NLT operates across -40°C to 130°C, which exceeds the UP0.4C-6R8-R range of -40°C to 85°C. This substitute is suitable for applications requiring extended high-temperature operation, provided the current requirement does not exceed 1.2 A.

Q: What is the Moisture Sensitivity Level for all parts?

A: All parts, including the main component and all substitutes, are classified as MSL 1 (Unlimited). This indicates unlimited shelf life and no special moisture control requirements during storage or handling.

Q: Are there any frequency-dependent performance differences between substitutes?

A: The SDR6603-6R8M and SDR0603-6R8ML provide specified Q factor and self-resonant frequency data (SDR6603-6R8M: Q 15.5 @ 7.96MHz, SRF 45MHz; SDR0603-6R8ML: Q 19 @ 7.96MHz, SRF 44MHz). The UP0.4C-6R8-R and P0770.682NLT do not provide these parameters. For applications sensitive to frequency response, the Bourns SDR series components offer documented performance characteristics.