CR43-3R9MC Equivalent & Substitute Parts Reference

Part Overview

The CR43-3R9MC is a 3.9 µH unshielded drum core wirewound inductor manufactured by Sumida America Components Inc., rated for 1.33 A with a maximum DC resistance of 93.7 mOhm. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design support and procurement continuity. The part operates across a temperature range of -40°C to 100°C and is not RoHS compliant.

Substiute Parts

CR43-3R9MC

Sumida America Components Inc.In Stock: 1043CR43-3R9MC Datasheet

Current PartRFQ

CR43NP-3R9MC

Sumida America Components Inc.In Stock: 2116CR43NP-3R9MC Datasheet

DirectRFQ

PF0580.382NL

Pulse ElectronicsIn Stock: 3818PF0580.382NL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CR43-3R9MC are identified based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

Critical Parameters for Substitution:

• Inductance value within tolerance band (3.9 µH ±20%)
• Current rating equal to or exceeding 1.33 A
• DC resistance at or below 93.7 mOhm maximum
• Surface mount configuration
• Unshielded drum core or wirewound construction
• Operating temperature range encompassing -40°C to 100°C
• Physical dimensions compatible with 4.80mm x 4.30mm x 3.50mm footprint

Direct Equivalent: CR43NP-3R9MC is an identical electrical specification part from the same manufacturer series, differing only in packaging format (Tape & Reel) and product status (Active vs. Obsolete).

Similar Substitute: PF0580.382NL from Pulse Electronics provides comparable electrical performance with inductance of 3.8 µH (within tolerance band), higher current rating of 1.7 A, and lower DC resistance of 68 mOhm, with extended operating temperature to 125°C.

Parameter Comparison

Engineering Selection Recommendations

CR43NP-3R9MC (Direct Equivalent): This part is the recommended primary substitute for CR43-3R9MC. It maintains identical electrical specifications and physical dimensions while offering active product status and ROHS3 compliance. The only functional difference is packaging format (Tape & Reel vs. bulk), which does not affect electrical performance. This substitute is suitable for direct replacement in all applications where the original part was specified.

PF0580.382NL (Similar Substitute): This Pulse Electronics part provides an alternative when CR43NP-3R9MC is unavailable. It delivers superior electrical performance with lower DC resistance (68 mOhm vs. 93.7 mOhm), higher current rating (1.7 A vs. 1.33 A), and extended operating temperature range (-40°C to 125°C vs. -40°C to 100°C). The inductance value of 3.8 µH falls within the ±20% tolerance band of the original 3.9 µH specification. Physical dimensions are nearly identical (4.70 x 4.20 x 3.48 mm vs. 4.80 x 4.30 x 3.50 mm), ensuring PCB footprint compatibility. Both substitute parts carry ROHS3 compliance, addressing regulatory requirements not met by the obsolete original part.

Frequently Asked Questions (FAQ)

Q: Can CR43NP-3R9MC be used as a direct replacement for CR43-3R9MC?

A: Yes. CR43NP-3R9MC is electrically and mechanically identical to CR43-3R9MC. The parts differ only in packaging format (Tape & Reel vs. bulk) and product status (Active vs. Obsolete). No circuit modifications are required.

Q: What are the key differences between CR43NP-3R9MC and PF0580.382NL?

A: Both parts meet the electrical requirements of the original CR43-3R9MC. PF0580.382NL offers lower DC resistance (68 mOhm vs. 93.7 mOhm), higher current rating (1.7 A vs. 1.33 A), and extended temperature range (-40°C to 125°C vs. -40°C to 100°C). The inductance value differs by 0.1 µH (3.8 µH vs. 3.9 µH), which is within the ±20% tolerance specification. Physical dimensions are nearly identical.

Q: Are the physical dimensions of PF0580.382NL compatible with CR43-3R9MC PCB layouts?

A: Yes. PF0580.382NL dimensions (4.70 x 4.20 x 3.48 mm) are within 0.1 mm of CR43-3R9MC dimensions (4.80 x 4.30 x 3.50 mm), ensuring compatibility with existing surface mount footprints.

Q: Does inductance tolerance affect substitution suitability?

A: The CR43-3R9MC specifies ±20% inductance tolerance. PF0580.382NL has ±15% tolerance. The 3.8 µH inductance of PF0580.382NL falls within the acceptable range of the original 3.9 µH specification (3.12 µH to 4.68 µH). Both parts are suitable for applications where the original tolerance was acceptable.

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

A: PF0580.382NL has lower DC resistance (68 mOhm vs. 93.7 mOhm), resulting in reduced power dissipation and heat generation. This represents an improvement over the original part specification and is suitable for all applications where CR43-3R9MC was used.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both CR43NP-3R9MC and PF0580.382NL are ROHS3 compliant, addressing regulatory requirements not met by the obsolete CR43-3R9MC.

Q: What is the significance of the extended operating temperature range in PF0580.382NL?

A: PF0580.382NL operates from -40°C to 125°C, compared to CR43-3R9MC at -40°C to 100°C. This extended range provides additional thermal margin for applications operating at elevated temperatures, though it is not required for direct substitution in designs originally specified for the narrower range.