Murata Power Solutions 55050C Current Sense Transformer Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 55050C is a 1:1:50 current sense transformer designed for invasive current sensing applications across the 50kHz to 500kHz frequency range. This surface mount component features a 3.8 mH inductance with 2.3mOhm primary and 350mOhm secondary DC resistance ratings. The 55050C is classified as obsolete, making identification of functionally equivalent substitute components essential for ongoing design support and production continuity.

Substiute Parts

55050C

Murata Power Solutions Inc.In Stock: 113855050C Datasheet

Current PartRFQ

PE-68210NL

Pulse ElectronicsIn Stock: 2314PE-68210NL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete Murata 55050C is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Turns ratio (Primary:Secondary): 1:1:50
• Frequency range: 50kHz – 500kHz
• Inductance: 3.8 mH
• Type: Invasive current sense transformer
• Mounting type: Surface Mount

Acceptable Variation Parameters:

• DC resistance (primary and secondary): Minor variations within typical component tolerances are acceptable provided the substitute maintains functional performance in the target application
• Physical dimensions: Substitute components must fit within the PCB footprint constraints; height and overall package dimensions must not exceed the original specifications

The Pulse Electronics PE-68210NL meets all critical matching parameters and is classified as an active product with current manufacturing support, making it a direct functional equivalent for the obsolete 55050C.

Parameter Comparison

Engineering Selection Recommendations

The Pulse Electronics PE-68210NL is the designated manufacturer-recommended substitute for the obsolete Murata 55050C. Both components share identical electrical specifications for turns ratio, frequency range, and inductance. The PE-68210NL offers the following advantages:

• Active product status with current manufacturing availability
• RoHS compliance certification
• Lower primary DC resistance (1.15mOhm vs. 2.3mOhm), resulting in reduced power dissipation
• Physically compatible footprint with dimensions within the original specification envelope
• Identical MSL rating, REACH status, and export classification

The PE-68210NL is suitable for direct substitution in applications currently using the 55050C without circuit redesign or performance degradation.

Frequently Asked Questions (FAQ)

Q: Can the PE-68210NL be used as a direct replacement for the 55050C in existing designs?

A: Yes. Both components share identical turns ratios (1:1:50), frequency ranges (50kHz – 500kHz), and inductance values (3.8 mH). Physical dimensions are compatible, and the PE-68210NL maintains the same surface mount package footprint. No circuit modifications are required.

Q: What is the significance of the lower primary DC resistance in the PE-68210NL?

A: The PE-68210NL primary resistance of 1.15mOhm compared to the 55050C at 2.3mOhm represents improved efficiency. Lower primary resistance reduces I²R losses in the current sensing path, resulting in lower heat generation and improved measurement accuracy in high-current applications.

Q: Are there any compliance or certification differences between these components?

A: The PE-68210NL carries RoHS compliance certification, whereas the 55050C status is not specified. Both components maintain identical REACH status (REACH Unaffected), ECCN classification (EAR99), and HTSUS codes (8504.31.2000). Both carry MSL 1 ratings.

Q: What are the physical dimension tolerances for PCB footprint compatibility?

A: The 55050C measures 0.496" L × 0.575" W (12.60mm × 14.60mm) with a maximum seated height of 0.280" (7.10mm). The PE-68210NL measures 0.495" L × 0.490" W (12.57mm × 12.45mm) with a maximum seated height of 0.280" (7.11mm). Both components fit within standard surface mount assembly processes and are compatible with existing PCB layouts designed for the 55050C.

Q: Is the secondary DC resistance difference (350mOhm vs. 380mOhm) significant?

A: The secondary resistance difference of 30mOhm represents a 8.6% variation. This falls within typical component manufacturing tolerances and does not affect functional substitution. The secondary winding impedance remains compatible with standard current sensing measurement circuits.