SCX147-250 Equivalent & Substitute Parts

Part Overview

The SCX147-250 is an unshielded 2-coil inductor array manufactured by Signal Transformer, designed for surface mount applications. This component features dual inductance configurations: 103.68 µH when coils are connected in series and 25 µH when connected in parallel, with a maximum DC resistance of 64 mOhm in parallel configuration and 254 mOhm in series configuration. The part is classified as obsolete, making identification of active equivalent components essential for ongoing production and design requirements.

Substiute Parts

SCX147-250

Signal TransformerIn Stock: 861SCX147-250 Datasheet

Current PartRFQ

CTX25-4-R

Eaton - Electronics DivisionIn Stock: 13707CTX25-4-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCX147-250 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Inductance values in both series (103.68 µH) and parallel (25 µH) configurations must be maintained within the specified ±20% tolerance band
• Current ratings must meet or exceed the original specifications: 2 A for parallel configuration and 1 A for series configuration
• DC resistance (DCR) values must not exceed the maximum specifications: 64 mOhm for parallel and 254 mOhm for series
• Dual-coil architecture with identical configuration capability

Mechanical Compatibility Criteria:

• Surface mount technology (SMD) mounting type
• Nonstandard package classification
• Physical dimensions and height must accommodate existing PCB layouts
• Unshielded construction matching the original design

Compliance and Environmental Criteria:

• RoHS3 compliance requirement
• MSL rating of 1 or better
• Operating temperature range compatibility

The CTX25-4-R from Eaton - Electronics Division meets all substitution criteria and is classified as an active product, providing long-term availability and supply chain stability.

Parameter Comparison

Engineering Selection Recommendations

The CTX25-4-R is the qualified substitute for the obsolete SCX147-250. Selection is based on the following engineering factors:

Product Status and Supply Chain: The SCX147-250 is classified as obsolete, creating supply chain risk for new production and long-term support. The CTX25-4-R maintains active product status with Eaton - Electronics Division, ensuring continued availability and manufacturing support.

Electrical Performance: The CTX25-4-R delivers equivalent or superior electrical characteristics across all measured parameters. Series inductance is identical at 103.68 µH, parallel inductance is 25.92 µH (within the ±20% tolerance specification), and DC resistance values are marginally lower, indicating improved efficiency in both configurations.

Compliance and Certifications: Both components maintain ROHS3 compliance and MSL rating of 1, meeting environmental and handling requirements. The CTX25-4-R operates across the -40°C to 85°C temperature range, providing defined thermal performance specifications.

Mechanical Compatibility: Physical dimensions are comparable (0.550" L x 0.550" W versus 0.567" L x 0.567" W for the original), with height reduced from 0.276" to 0.250". These dimensional differences are within typical PCB layout tolerances for nonstandard surface mount packages. Packaging is provided in Tape & Reel format, supporting automated assembly processes.

Frequently Asked Questions (FAQ)

Q: What makes the CTX25-4-R a valid substitute for the SCX147-250?

A: The CTX25-4-R meets all critical electrical parameters within specified tolerances. Series inductance is identical, parallel inductance is 25.92 µH (within ±20% tolerance of the 25 µH specification), current ratings are matched, and DC resistance values are equal or better. Both components are unshielded, dual-coil surface mount inductors with identical configuration capabilities and compliance certifications.

Q: Are there dimensional differences between these components?

A: Yes. The CTX25-4-R measures 0.550" L x 0.550" W (13.97mm x 13.97mm) with a height of 0.250" (6.35mm), compared to the SCX147-250 at 0.567" L x 0.567" W (14.40mm x 14.40mm) with a height of 0.276" (7.00mm). These differences are minor and typically accommodated in standard PCB layout designs for nonstandard surface mount packages.

Q: Does the CTX25-4-R require different handling or storage procedures?

A: No. Both components share identical Moisture Sensitivity Level (MSL) ratings of 1 (Unlimited), eliminating the need for modified storage or handling protocols. Standard surface mount component handling procedures apply to both parts.

Q: What is the packaging format for the CTX25-4-R?

A: The CTX25-4-R is supplied in Tape & Reel (TR) format, which is standard for automated assembly processes and provides improved handling efficiency compared to alternative packaging methods.

Q: Is the CTX25-4-R suitable for new design implementations?

A: Yes. The CTX25-4-R is classified as an active product with established supply chain availability. It is appropriate for both replacement of obsolete SCX147-250 components and new design implementations requiring dual-coil inductor arrays with these electrical specifications.