CTX250-4 Equivalent & Substitute Parts

Part Overview

The CTX250-4 is an unshielded 2-coil inductor array manufactured by Eaton - Electronics Division in the OCTA-PAC® series. This surface mount component provides dual inductance configurations: 1 mH when coils are connected in series and 250 µH when connected in parallel. The part is classified as obsolete, necessitating identification of active equivalent components for ongoing design support and procurement.

Substiute Parts

CTX250-4

Eaton - Electronics DivisionIn Stock: 798CTX250-4 Datasheet

Current PartRFQ

CTX250-4-R

Eaton - Electronics DivisionIn Stock: 2617CTX250-4-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The CTX250-4-R qualifies as a direct substitute based on the following alignment of critical electrical and mechanical parameters:

Electrical Equivalence:

• Identical inductance values in both parallel (250 µH) and series (1 mH) configurations
• Matching tolerance specification (±20%)
• Identical operating temperature range (-40°C ~ 85°C)
• Unshielded construction maintained

Mechanical Equivalence:

• Identical physical dimensions: 0.550" L x 0.550" W (13.97mm x 13.97mm)
• Identical height: 0.250" (6.35mm)
• Same nonstandard package / case classification
• Surface mount mounting type preserved

Compliance Enhancement:

• CTX250-4-R is active product status versus obsolete status of CTX250-4
• CTX250-4-R is ROHS3 compliant and REACH unaffected
• CTX250-4-R includes specified current ratings (650 mA parallel, 330 mA series)

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: CTX250-4-R

The CTX250-4-R is the direct functional equivalent of the obsolete CTX250-4. Selection of CTX250-4-R is appropriate for all applications where the CTX250-4 was previously specified, provided the following conditions are met:

1. Compliance Requirements: CTX250-4-R satisfies ROHS3 compliance and REACH unaffected status, making it suitable for applications with regulatory compliance mandates. The original CTX250-4 is RoHS non-compliant and should not be used in new designs subject to RoHS directives.

2. Electrical Performance: Both parts deliver identical inductance values (250 µH parallel, 1 mH series) and tolerance (±20%). The CTX250-4-R provides explicit current ratings (650 mA parallel, 330 mA series), enabling precise circuit design validation.

3. Physical Integration: Identical mechanical dimensions and surface mount configuration ensure direct PCB layout compatibility without redesign.

4. Supply Chain: CTX250-4-R is active product status with 2579 pieces in stock, ensuring long-term availability. The CTX250-4 is obsolete with limited remaining inventory (759 pieces).

5. Packaging Consideration: CTX250-4-R is supplied in Tape & Reel (TR) format, standard for automated assembly operations. Original CTX250-4 bulk packaging may require manual handling.

Frequently Asked Questions (FAQ)

Q: Can CTX250-4-R be used as a direct replacement for CTX250-4 in existing designs?

A: Yes. The CTX250-4-R maintains identical electrical specifications (250 µH parallel, 1 mH series inductance, ±20% tolerance) and mechanical dimensions (0.550" x 0.550" x 0.250" height). No circuit redesign or PCB layout modification is required.

Q: What is the primary advantage of switching from CTX250-4 to CTX250-4-R?

A: The CTX250-4-R is active product status with confirmed long-term availability, whereas CTX250-4 is obsolete. Additionally, CTX250-4-R is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronics manufacturing.

Q: Are the current ratings of CTX250-4-R critical for substitution?

A: The CTX250-4-R specifies current ratings of 650 mA (parallel configuration) and 330 mA (series configuration). These ratings should be verified against circuit requirements to ensure adequate component performance. The original CTX250-4 does not provide current rating specifications.

Q: Does the Tape & Reel packaging of CTX250-4-R affect compatibility?

A: No. Tape & Reel packaging is standard for surface mount components and is compatible with automated assembly equipment. Packaging format does not affect electrical or mechanical performance.

Q: Are there any temperature or environmental differences between the two parts?

A: No. Both parts operate across the identical temperature range of -40°C to 85°C and maintain MSL 1 (Unlimited) moisture sensitivity classification.

Q: What is the tolerance specification for both parts?

A: Both CTX250-4 and CTX250-4-R maintain ±20% inductance tolerance across all configurations.