CTX20-4P Equivalent & Substitute Parts

Part Overview

The CTX20-4P is an unshielded 2-coil inductor array manufactured by Eaton - Electronics Division, part of the Econo-Pac™ series. This surface mount component provides dual inductance configurations: 82.47 µH in series and 20.62 µH in parallel, with a maximum DC resistance of 84 mOhm in parallel configuration. The CTX20-4P is classified as obsolete product status, making identification of equivalent and substitute parts essential for ongoing design support, production continuity, and component procurement.

Substiute Parts

CTX20-4P

Eaton - Electronics DivisionIn Stock: 934CTX20-4P Datasheet

Current PartRFQ

CTX20-4P-R

Eaton - Electronics DivisionIn Stock: 1503CTX20-4P-R Datasheet

DirectRFQ

4448-18L

API Delevan Inc.In Stock: 12284448-18L Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CTX20-4P are identified based on strict electrical and mechanical parameter compatibility. The substitution logic is organized into two categories:

Direct Manufacturer Substitute (Eaton - Electronics Division): The CTX20-4P-R maintains identical electrical specifications across all critical parameters: inductance values (82.47 µH series, 20.62 µH parallel), current ratings (1.9 A parallel, 950 mA series), DC resistance (84 mOhm parallel, 337 mOhm series), tolerance (±20%), operating temperature range (-40°C ~ 85°C), and physical dimensions (0.550" x 0.550" x 0.250"). The primary distinction is packaging format (Tape & Reel versus standard) and product status (Active versus Obsolete).

Similar Manufacturer Substitute (API Delevan Inc.): The 4448-18L provides comparable electrical performance with minor parameter variations within acceptable engineering tolerances. Inductance values are nominally equivalent (80 µH series versus 82.47 µH, 20 µH parallel versus 20.62 µH), current ratings are identical (1.9 A parallel, 950 mA series), and DC resistance is within specification (85 mOhm parallel versus 84 mOhm). Tolerance is tighter (±15% versus ±20%), and operating temperature range is extended (-55°C ~ 125°C versus -40°C ~ 85°C). Physical dimensions are comparable (0.530" x 0.530" x 0.310" versus 0.550" x 0.550" x 0.250"), and both components are unshielded surface mount devices with 2 coils.

Parameter Comparison

Engineering Selection Recommendations

CTX20-4P-R (Direct Eaton Substitute): The CTX20-4P-R is the primary substitute for the obsolete CTX20-4P. This part maintains 100% electrical and mechanical compatibility with identical inductance values, current ratings, DC resistance specifications, and physical dimensions. The CTX20-4P-R is classified as Active product status, ensuring long-term availability and supply chain continuity. The component achieves ROHS3 compliance, providing environmental regulatory advantage over the original CTX20-4P. Tape & Reel packaging is standard for production environments. Selection of CTX20-4P-R is appropriate for direct replacement in all applications previously using CTX20-4P.

4448-18L (Alternative Manufacturer Substitute): The 4448-18L from API Delevan Inc. provides functional equivalence with minor parameter variations. Inductance values differ by approximately 3% in series configuration (80 µH versus 82.47 µH) and 3% in parallel configuration (20 µH versus 20.62 µH), both within the ±20% tolerance specification of the original part. DC resistance values are within 1.2% of maximum specifications. Current ratings are identical. The 4448-18L offers extended operating temperature range (-55°C ~ 125°C versus -40°C ~ 85°C) and tighter tolerance (±15% versus ±20%), providing performance margin in temperature-sensitive applications. Physical dimensions are comparable with minor height variation (0.310" versus 0.250"). Moisture sensitivity level is higher (5A versus 1), requiring 24-hour dry storage prior to assembly. Selection of 4448-18L is appropriate when extended temperature performance or tighter tolerance is required, or when supply constraints limit CTX20-4P-R availability.

Frequently Asked Questions (FAQ)

Q: Can CTX20-4P-R be used as a direct replacement for CTX20-4P? A: Yes. The CTX20-4P-R maintains identical electrical specifications (inductance, current rating, DC resistance, tolerance) and physical dimensions. The primary differences are product status (Active versus Obsolete) and packaging format (Tape & Reel). Both components are unshielded 2-coil inductor arrays with identical performance characteristics.

Q: What are the key differences between CTX20-4P-R and 4448-18L? A: Both parts provide equivalent inductance and current handling. The 4448-18L has inductance values approximately 3% lower (80 µH series, 20 µH parallel), tighter tolerance (±15%), extended operating temperature range (-55°C ~ 125°C), and higher moisture sensitivity (5A). Physical dimensions are comparable with minor height variation. DC resistance specifications are within 1.2% of each other.

Q: Are there any compliance differences between the substitute parts? A: Yes. The CTX20-4P-R is ROHS3 compliant, while both the original CTX20-4P and 4448-18L are RoHS non-compliant. The CTX20-4P-R provides environmental regulatory advantage for applications subject to RoHS requirements.

Q: What is the moisture sensitivity consideration for 4448-18L? A: The 4448-18L has Moisture Sensitivity Level 5A, requiring 24-hour dry storage prior to assembly. The CTX20-4P and CTX20-4P-R have MSL 1 (Unlimited), requiring no special moisture handling. This affects component storage and assembly procedures.

Q: Can 4448-18L be used in applications requiring the exact inductance of CTX20-4P? A: The 4448-18L inductance values (80 µH series, 20 µH parallel) differ by approximately 3% from CTX20-4P specifications (82.47 µH series, 20.62 µH parallel). Both values fall within the ±20% tolerance specification. Application suitability depends on circuit design tolerance requirements. For applications requiring exact inductance matching, CTX20-4P-R is the appropriate selection.

Q: Are physical dimensions compatible for PCB layout? A: CTX20-4P and CTX20-4P-R have identical footprints (0.550" x 0.550" x 0.250"). The 4448-18L has slightly smaller length and width (0.530" x 0.530") and greater height (0.310" versus 0.250"). PCB layout verification is required when substituting with 4448-18L to confirm clearance and component placement compatibility.

Q: Which substitute part should be selected for new designs? A: For new designs, CTX20-4P-R is the recommended selection. It provides identical electrical performance to the obsolete CTX20-4P, maintains Active product status for long-term availability, achieves ROHS3 compliance, and is available in standard Tape & Reel packaging for production environments.