CD1-7R0-R Equivalent & Substitute Parts

Part Overview

The CD1-7R0-R is a 7 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 4.55 A continuous current with a maximum DC resistance of 27 mOhm and operates across the temperature range of -40°C to 85°C. The part carries an obsolete product status, making identification of suitable equivalent components essential for ongoing design support, production continuity, and system maintenance.

Substiute Parts

CD1-7R0-R

Eaton - Electronics DivisionIn Stock: 1160CD1-7R0-R Datasheet

Current PartRFQ

DR1040-7R0-R

Eaton - Electronics DivisionIn Stock: 1563DR1040-7R0-R Datasheet

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CDRH104RNP-7R0NC

Sumida America Components Inc.In Stock: 4109CDRH104RNP-7R0NC Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD1-7R0-R is determined by strict alignment across the following critical parameters:

Mandatory Matching Parameters:

• Inductance value: 7 µH
• Inductance tolerance: ±30%
• Core material: Ferrite
• Shielding: Shielded configuration
• Mounting type: Surface Mount
• Saturation current (Isat): 4.8 A
• Moisture sensitivity level: 1 (Unlimited)
• Test frequency: 100 kHz

Allowable Variation Parameters:

• Current rating: Minimum 4.5 A (original part rated 4.55 A)
• DC resistance: Up to 27 mOhm maximum
• Operating temperature range: Must encompass or extend the original -40°C to 85°C range
• Physical dimensions: Minor variations acceptable within nonstandard package constraints
• Packaging format: Tape & Reel acceptable for surface mount applications

Two substitute parts meet these criteria: the DR1040-7R0-R (Eaton - Electronics Division, active status) and the CDRH104RNP-7R0NC (Sumida America Components Inc., active status).

Parameter Comparison

Engineering Selection Recommendations

DR1040-7R0-R (Eaton - Electronics Division)

The DR1040-7R0-R is the primary substitute for the obsolete CD1-7R0-R. Both components are manufactured by Eaton - Electronics Division, ensuring design continuity and supply chain alignment. The DR1040-7R0-R carries active product status with extended availability. This part features a lower DC resistance specification (20 mOhm Max versus 27 mOhm Max), which provides improved thermal performance and reduced power dissipation. The operating temperature range extends to 125°C, exceeding the original part's 85°C maximum. The DR1040-7R0-R is ROHS3 compliant and REACH unaffected, meeting modern regulatory requirements. Current rating of 4.5 A remains within acceptable tolerance of the original 4.55 A specification. Physical dimensions are nearly identical, with only a 0.1mm width variation.

CDRH104RNP-7R0NC (Sumida America Components Inc.)

The CDRH104RNP-7R0NC is a secondary substitute manufactured by Sumida America Components Inc. This part maintains identical inductance, tolerance, saturation current, and DC resistance specifications to the original CD1-7R0-R. The component carries active product status with substantial inventory availability (4060 pieces). Operating temperature range extends to 100°C, providing adequate coverage above the original specification. The CDRH104RNP-7R0NC is ROHS3 compliant. Physical dimensions are slightly reduced (10.20mm x 10.00mm versus 10.50mm x 10.40mm), which may require PCB layout verification for space-constrained applications. Current rating of 4.5 A aligns with the DR1040-7R0-R specification.

Frequently Asked Questions (FAQ)

Q: Can the DR1040-7R0-R directly replace the CD1-7R0-R in existing designs?

A: Yes. The DR1040-7R0-R meets all critical electrical parameters: 7 µH inductance, ±30% tolerance, 4.8 A saturation current, shielded ferrite core, and surface mount configuration. The lower DC resistance (20 mOhm versus 27 mOhm) is a performance improvement. Physical dimensions are nearly identical. The extended operating temperature range (-40°C to 125°C) provides additional margin beyond the original -40°C to 85°C specification.

Q: What is the difference in DC resistance between the substitute parts?

A: The DR1040-7R0-R specifies 20 mOhm maximum DC resistance, while both the CD1-7R0-R and CDRH104RNP-7R0NC specify 27 mOhm maximum. Lower DC resistance reduces I²R losses and heat generation. For applications sensitive to power dissipation, the DR1040-7R0-R offers superior thermal characteristics.

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

A: The DR1040-7R0-R operates to 125°C, providing the widest temperature margin. The CDRH104RNP-7R0NC operates to 100°C. Both exceed the original CD1-7R0-R specification of 85°C. Selection depends on specific application temperature requirements.

Q: Do the substitute parts have different physical dimensions?

A: Minor dimensional variations exist. The DR1040-7R0-R is 10.50mm x 10.30mm (0.1mm width reduction). The CDRH104RNP-7R0NC is 10.20mm x 10.00mm (0.3mm length and 0.4mm width reduction). All three parts maintain 4.00mm height. For space-constrained PCB layouts, verify clearance with the CDRH104RNP-7R0NC.

Q: What is the current rating difference between the main part and substitutes?

A: The CD1-7R0-R is rated for 4.55 A continuous current. Both substitute parts are rated for 4.5 A. This 0.05 A reduction is negligible for most applications and remains within the ±30% inductance tolerance band. All three parts share identical 4.8 A saturation current specifications.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both the DR1040-7R0-R and CDRH104RNP-7R0NC are ROHS3 compliant. The original CD1-7R0-R RoHS status is not specified in the provided data.

Q: Which substitute part should be selected for new designs?

A: The DR1040-7R0-R is recommended for new designs due to active manufacturer status from Eaton - Electronics Division, superior DC resistance specification (20 mOhm), extended temperature range (125°C), and established supply chain continuity. The CDRH104RNP-7R0NC is a viable alternative when Eaton parts are unavailable or when the identical DC resistance specification (27 mOhm) to the original part is required.

Q: Can these parts be used interchangeably in the same PCB assembly?

A: The DR1040-7R0-R and CDRH104RNP-7R0NC can be used interchangeably from an electrical standpoint. Physical dimension verification is required for the CDRH104RNP-7R0NC due to its slightly smaller footprint. Packaging format differs (Tape & Reel for both substitutes versus unspecified for the original), which affects assembly line compatibility but not functional performance.