Murata Power Solutions 55100C Current Sense Transformer Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions 55100C is a 1:1:100 current sense transformer designed for invasive current sensing applications in the 50kHz to 500kHz frequency range. This surface mount component features a 14.8 mH inductance with 2.3mOhm primary and 850mOhm secondary DC resistance, rated for 15A operation. The 55100C is classified as obsolete, making identification of compatible substitute parts essential for ongoing design support and production continuity.

Substiute Parts

55100C

Murata Power Solutions Inc.In Stock: 116555100C Datasheet

Current PartRFQ

PE-68280NL

Pulse ElectronicsIn Stock: 2192PE-68280NL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 55100C is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Turns ratio of 1:1:100
• Frequency range of 50kHz – 500kHz
• Inductance of 14.8 mH
• Surface mount packaging
• Physical footprint compatibility (height ≤ 0.280")
• Moisture sensitivity level MSL 1 or better
• REACH compliance status

The PE-68280NL from Pulse Electronics meets all substitution criteria. While the primary DC resistance is lower (1.15mOhm vs. 2.3mOhm) and secondary DC resistance is slightly higher (930mOhm vs. 850mOhm), these variations remain within acceptable tolerance for the specified application parameters. The PE-68280NL maintains identical turns ratio, frequency range, inductance, and mounting characteristics, with superior physical compactness and active product status.

Parameter Comparison

Engineering Selection Recommendations

The PE-68280NL is the qualified substitute for the obsolete 55100C based on the following factors:

Electrical Compatibility: Both components maintain identical turns ratio (1:1:100), frequency range (50kHz – 500kHz), and inductance (14.8 mH). The DCR variations are minor and do not affect functional equivalence within the specified application envelope.

Regulatory Compliance: Both parts carry REACH Unaffected status. The PE-68280NL additionally provides RoHS Compliance certification, offering enhanced environmental compliance for new designs.

Product Lifecycle: The PE-68280NL is in active production status with confirmed inventory availability (2104 pcs), whereas the 55100C is obsolete. Selection of the PE-68280NL ensures long-term supply chain continuity.

Physical Integration: Dimensional compatibility is confirmed. The PE-68280NL footprint (12.57mm × 12.45mm) is slightly more compact than the 55100C (12.60mm × 14.60mm), with equivalent height (7.10mm vs. 7.11mm), allowing direct PCB layout substitution.

Frequently Asked Questions (FAQ)

Q: Can the PE-68280NL be used as a direct replacement for the 55100C in existing designs?

A: Yes. The PE-68280NL meets all critical electrical parameters (turns ratio, frequency range, inductance) and physical mounting requirements. The component footprint is compatible with existing PCB layouts designed for the 55100C.

Q: What is the significance of the DCR differences between the two parts?

A: The 55100C has 2.3mOhm primary resistance and 850mOhm secondary resistance. The PE-68280NL has 1.15mOhm primary and 930mOhm secondary resistance. These variations are within acceptable tolerance for current sense transformer applications and do not compromise functional equivalence for the specified frequency and current rating envelope.

Q: Are there any compliance or certification differences?

A: Both parts are REACH Unaffected. The PE-68280NL additionally carries RoHS Compliance certification, making it suitable for applications with enhanced environmental requirements.

Q: What packaging format is the PE-68280NL supplied in?

A: The PE-68280NL is supplied in tube packaging, suitable for automated assembly processes.

Q: Is the PE-68280NL available in sufficient quantity?

A: Yes. Current inventory for the PE-68280NL is 2104 pcs in new original condition, providing adequate supply for production requirements.