CD1-101-R Fixed Inductor 100µH Equivalent & Substitute Parts

Part Overview

The CD1-101-R is a 100µH shielded drum core wirewound inductor manufactured by Eaton Electronics Division, rated for 1.36A continuous current with a maximum DC resistance of 304mOhm. This component is classified as obsolete product status. Due to its obsolete designation, identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications. Substitute parts must maintain electrical and mechanical compatibility within the specified parameter tolerances.

Substiute Parts

CD1-101-R

Eaton - Electronics DivisionIn Stock: 1028CD1-101-R Datasheet

Current PartRFQ

DR1040-101-R

Eaton - Electronics DivisionIn Stock: 1945DR1040-101-R Datasheet

DirectRFQ

CDRH104RNP-101NC

Sumida America Components Inc.In Stock: 5434CDRH104RNP-101NC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD1-101-R are qualified based on the following critical parameters that determine functional equivalence:

Primary Electrical Parameters:

• Inductance value: 100µH with ±30% tolerance
• DC resistance: 304mOhm maximum
• Saturation current: 1.35A minimum
• Shielding requirement: Shielded configuration

Mechanical Parameters:

• Mounting type: Surface mount only
• Physical footprint compatibility: Dimensions within acceptable tolerance range
• Height constraint: 4.00mm maximum seated height

Environmental Parameters:

• Operating temperature range: Minimum -40°C to 85°C (CD1-101-R baseline)
• Moisture sensitivity: MSL 1 classification

Substitute parts must satisfy all primary electrical parameters and maintain mechanical compatibility. Parts with extended temperature ranges or improved product status (Active vs. Obsolete) are acceptable provided electrical specifications remain within tolerance.

Parameter Comparison

Engineering Selection Recommendations

DR1040-101-R (Eaton Electronics Division): This part is the primary direct substitute. It maintains identical inductance, DC resistance, and saturation current specifications. The current rating is reduced from 1.36A to 1.25A; this reduction is acceptable only in applications where the design current does not exceed 1.25A. The part features Active product status, ensuring long-term availability. Operating temperature range extends to 125°C, providing superior thermal performance compared to the CD1-101-R baseline of 85°C. Physical dimensions are nearly identical with negligible variation. ROHS3 compliance and Tape & Reel packaging support modern manufacturing processes.

CDRH104RNP-101NC (Sumida America Components Inc.): This part qualifies as a secondary substitute from an alternative manufacturer. Electrical specifications match the primary substitute: 100µH inductance, 304mOhm DC resistance, and 1.35A saturation current. Current rating is 1.25A, subject to the same application constraint noted above. Operating temperature range reaches 100°C, exceeding the original CD1-101-R specification. Physical footprint is slightly smaller (10.20mm × 10.00mm versus 10.50mm × 10.40mm), which may require PCB layout verification for tight spacing applications. ROHS3 compliance and MSL 1 rating are confirmed. Cut Tape and Digi-Reel packaging options support both prototype and production environments.

Selection Criteria:

• For applications requiring 1.36A continuous current: DR1040-101-R is not suitable; evaluate alternative sources or design modification.
• For applications operating at or below 1.25A: Both DR1040-101-R and CDRH104RNP-101NC are acceptable.
• For extended temperature operation beyond 85°C: Both substitutes provide improved thermal range.
• For RoHS compliance requirements: Both substitutes meet ROHS3 standards.
• For PCB space constraints: CDRH104RNP-101NC offers a smaller footprint.

Frequently Asked Questions (FAQ)

Q: Can DR1040-101-R replace CD1-101-R in all applications?

A: DR1040-101-R is electrically compatible for applications where continuous current does not exceed 1.25A. The CD1-101-R is rated for 1.36A; if your design requires this full current capacity, DR1040-101-R is not suitable. Verify your actual operating current before substitution.

Q: What is the significance of the current rating difference between CD1-101-R (1.36A) and the substitutes (1.25A)?

A: Current rating defines the maximum continuous current the inductor can handle without exceeding temperature limits. A lower rating indicates reduced thermal headroom at that current level. If your circuit operates at 1.30A, the CD1-101-R provides margin; the substitutes do not. Thermal analysis of your specific application is required.

Q: Are the physical dimension differences between CDRH104RNP-101NC and CD1-101-R significant?

A: CDRH104RNP-101NC is 0.30mm shorter in length and 0.40mm narrower in width. For most PCB layouts, this difference is negligible. However, if your design has tight spacing constraints or uses a footprint specifically designed for the CD1-101-R dimensions, verify clearance before substitution.

Q: Do the substitute parts have better environmental ratings?

A: Yes. DR1040-101-R extends the operating temperature range to 125°C (versus 85°C for CD1-101-R). CDRH104RNP-101NC reaches 100°C. Both substitutes maintain MSL 1 (Unlimited) moisture sensitivity, matching the original part. If your application operates above 85°C, the substitutes provide improved performance margin.

Q: Why is product status (Obsolete vs. Active) important?

A: Obsolete parts have limited or no future availability. Active parts are in current production with assured supply. DR1040-101-R and CDRH104RNP-101NC are both Active, ensuring you can source these components for ongoing production and future repairs without supply risk.

Q: Are there packaging considerations for manufacturing?

A: CD1-101-R packaging is not specified in available data. DR1040-101-R is supplied in Tape & Reel format, standard for automated assembly. CDRH104RNP-101NC offers both Cut Tape and Digi-Reel options, providing flexibility for prototype and production volumes. Confirm your assembly equipment compatibility with the selected packaging format.

Q: Is RoHS compliance a factor in substitution?

A: Both substitute parts are ROHS3 compliant. If your application or market requires RoHS compliance, the substitutes meet this requirement. The original CD1-101-R RoHS status is not specified; if compliance is mandatory, use only the substitute parts.

Q: Can I use CDRH104RNP-101NC and DR1040-101-R interchangeably?

A: Both parts meet the same electrical specifications (100µH, 304mOhm, 1.25A rating, 1.35A saturation). Physical dimensions differ slightly. For most applications, they are interchangeable. However, if your PCB footprint is tightly constrained, verify that both parts fit within your layout before committing to either substitute.