SCX147-330 Equivalent & Substitute Parts

Part Overview

The SCX147-330 is an unshielded 2-coil inductor array manufactured by Signal Transformer, designed for surface mount applications. This component features dual inductance configurations: 132.5 µH when coils are connected in series and 33 µH when connected in parallel. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

SCX147-330

Signal TransformerIn Stock: 940SCX147-330 Datasheet

Current PartRFQ

CTX33-4-R

Eaton - Electronics DivisionIn Stock: 46603CTX33-4-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCX147-330 is determined by strict equivalence across the following critical parameters:

• Dual-coil inductor array configuration with identical series and parallel inductance values
• Matching current ratings in both series and parallel configurations
• DC resistance specifications within the maximum allowable limits
• Identical tolerance band (±20%)
• Unshielded construction
• Surface mount technology
• RoHS3 compliance and MSL Level 1 rating

The CTX33-4-R from Eaton - Electronics Division meets these substitution criteria through functional and electrical equivalence, despite minor variations in physical dimensions and packaging format.

Parameter Comparison

Engineering Selection Recommendations

The CTX33-4-R is the qualified substitute for the obsolete SCX147-330 based on the following factors:

• Electrical specifications are functionally equivalent across all critical parameters
• The substitute maintains ROHS3 compliance and MSL Level 1 rating, ensuring regulatory and environmental compatibility
• Active product status of the CTX33-4-R ensures long-term availability and supply chain continuity
• Physical dimensions differ slightly (0.550" x 0.550" x 0.250" versus 0.567" x 0.567" x 0.276"), requiring PCB layout verification for mechanical fit
• Packaging format change from nonstandard to Tape & Reel (TR) may require assembly process adjustment

Frequently Asked Questions (FAQ)

Q: Can the CTX33-4-R be used as a direct replacement for the SCX147-330?

A: The CTX33-4-R is electrically equivalent to the SCX147-330 across all specified parameters. However, physical dimensions differ slightly, requiring verification that the component footprint accommodates the substitute's size specifications before implementation.

Q: What is the significance of the inductance difference in parallel configuration (33 µH vs. 33.12 µH)?

A: The 0.12 µH difference falls within the ±20% tolerance specification for both parts, making them functionally equivalent for circuit design purposes.

Q: Does the packaging change from nonstandard to Tape & Reel affect compatibility?

A: Tape & Reel packaging is a supply and assembly format consideration, not an electrical or mechanical compatibility issue. Assembly equipment must be compatible with TR packaging, but the component itself functions identically.

Q: Are there compliance differences between the two parts?

A: Both parts maintain ROHS3 compliance, MSL Level 1 rating, and REACH Unaffected status. No compliance barriers exist for substitution.

Q: What should be verified before implementing the CTX33-4-R as a substitute?

A: Verify PCB footprint accommodation for the slightly smaller physical dimensions of the CTX33-4-R and confirm assembly equipment compatibility with Tape & Reel packaging format.