UP0.4C-221-R Equivalent & Substitute Parts

Part Overview

The UP0.4C-221-R is a 220 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division, rated for 250 mA continuous current. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing design support and procurement continuity. The part operates across the temperature range of -40°C to 85°C and is suitable for surface mount applications in nonstandard package configurations.

Substiute Parts

UP0.4C-221-R

Eaton - Electronics DivisionIn Stock: 754UP0.4C-221-R Datasheet

Current PartRFQ

P0770.224NLT

Pulse ElectronicsIn Stock: 3977P0770.224NLT Datasheet

DirectRFQ

SDR0603-221KL

Bourns Inc.In Stock: 1957SDR0603-221KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UP0.4C-221-R are qualified based on the following critical parameters:

Primary Matching Criteria:

• Inductance value: 220 µH (exact match required)
• Inductance tolerance: ±20% or tighter
• Current rating: minimum 250 mA or greater
• Shielding configuration: Unshielded
• Mounting type: Surface Mount
• Operating temperature range: minimum -40°C to 85°C coverage
• Physical footprint compatibility: nonstandard package with similar dimensional constraints

Substitute Classification:

Direct Substitute (P0770.224NLT): Pulse Electronics part meets the 220 µH inductance specification with ±20% tolerance and provides 200 mA current rating. While the current rating is 50 mA below the original specification, the saturation current of 220 mA provides operational margin. The part maintains unshielded wirewound construction, surface mount configuration, and extended operating temperature range to 130°C. Physical dimensions match the original part exactly.

Similar Substitute (SDR0603-221KL): Bourns Inc. part delivers 220 µH inductance with improved ±10% tolerance and 260 mA current rating, exceeding the original specification. The drum core ferrite construction and unshielded configuration align with the original design. Current saturation of 460 mA provides substantial operational headroom. Operating temperature range extends to 125°C. Physical dimensions differ slightly (0.228" x 0.228" footprint versus 0.260" x 0.175"), requiring mechanical verification for board layout compatibility.

Parameter Comparison

Engineering Selection Recommendations

P0770.224NLT Selection Criteria:

The P0770.224NLT from Pulse Electronics is the direct substitute for the UP0.4C-221-R. This part maintains identical physical dimensions, enabling direct board layout compatibility without redesign. The part is currently in active production status, ensuring long-term availability and supply chain stability. ROHS3 compliance and REACH unaffected status satisfy modern regulatory requirements. The 200 mA current rating is 50 mA below the original specification; however, the saturation current of 220 mA provides operational margin for transient conditions. The extended operating temperature range to 130°C exceeds the original -40°C to 85°C specification, offering enhanced thermal performance. This part is suitable for direct replacement in existing designs without mechanical or electrical modifications.

SDR0603-221KL Selection Criteria:

The SDR0603-221KL from Bourns Inc. is a similar substitute offering superior electrical performance characteristics. The ±10% inductance tolerance is tighter than the original ±20% specification, providing improved circuit accuracy. The 260 mA current rating and 460 mA saturation current exceed the original design requirements, delivering enhanced operational headroom. The 2 Ohm maximum DC resistance is lower than the P0770.224NLT alternative, reducing power dissipation. ROHS3 compliance and REACH unaffected status align with regulatory standards. The physical footprint differs from the original part (0.228" x 0.228" versus 0.260" x 0.175"), requiring mechanical verification and potential board layout modifications. This part is suitable for new designs or redesigns where footprint adjustment is acceptable and improved performance characteristics are beneficial.

Frequently Asked Questions (FAQ)

Q: Can the P0770.224NLT be used as a direct replacement for the UP0.4C-221-R without board modifications?

A: Yes. The P0770.224NLT maintains identical physical dimensions (0.260" L x 0.175" W x 0.115" H) and mounting type, enabling direct board-level substitution without layout changes. The part is electrically compatible within the specified operating parameters.

Q: What is the significance of the 50 mA current rating difference between the UP0.4C-221-R (250 mA) and P0770.224NLT (200 mA)?

A: The P0770.224NLT has a continuous current rating of 200 mA, which is 50 mA below the original specification. However, the saturation current of 220 mA provides operational margin for transient current conditions. Circuit designers must verify that peak current demands do not exceed 200 mA continuous operation to ensure reliable performance.

Q: Why does the SDR0603-221KL have different physical dimensions than the original part?

A: The SDR0603-221KL uses a square footprint (0.228" x 0.228") compared to the rectangular footprint of the UP0.4C-221-R (0.260" x 0.175"). This dimensional difference reflects different manufacturing processes and core geometries between Bourns and Eaton designs. Board layout compatibility must be verified before selection.

Q: Are both substitute parts compliant with current regulatory standards?

A: Yes. Both the P0770.224NLT and SDR0603-221KL are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. The original UP0.4C-221-R compliance status is not specified in available documentation.

Q: What is the impact of DC resistance differences on circuit performance?

A: The P0770.224NLT has a maximum DC resistance of 3.11 Ohm, while the SDR0603-221KL has a maximum of 2 Ohm. Lower DC resistance reduces power dissipation and heat generation. For applications sensitive to inductor losses, the SDR0603-221KL offers improved efficiency. Circuit designers should calculate power dissipation at the specified current ratings to determine if the difference is significant for the application.

Q: Can the SDR0603-221KL be used in applications requiring the exact footprint of the UP0.4C-221-R?

A: No. The SDR0603-221KL footprint (0.228" x 0.228") differs from the original (0.260" x 0.175"). This part requires board redesign or layout modification. Use the P0770.224NLT for direct footprint compatibility.

Q: What is the operating temperature advantage of the substitute parts?

A: Both substitute parts extend the operating temperature range beyond the original specification. The P0770.224NLT operates to 130°C (versus 85°C original), and the SDR0603-221KL operates to 125°C. This extended range provides thermal margin for applications in elevated ambient conditions or high-power dissipation environments.

Q: How do inductance tolerances affect circuit design?

A: The original UP0.4C-221-R has ±20% tolerance, while the SDR0603-221KL offers ±10% tolerance. Tighter tolerance improves circuit accuracy and reduces performance variation across production batches. Applications requiring precise inductance values benefit from the SDR0603-221KL selection.