CS-1100-R Current Sense Transformer Equivalent & Substitute Parts

Part Overview

The CS-1100-R is a 20 A current sense transformer manufactured by Eaton - Electronics Division, designed for non-invasive current measurement applications in the 20kHz to 200kHz frequency range. This component operates as a solid core transformer with a 100:1 current ratio and is mounted through hole on printed circuit boards.

The CS-1100-R is classified as obsolete. Locating equivalent substitute parts is necessary to support ongoing system maintenance, repair, and new design implementations where this component specification remains functionally required.

Substiute Parts

CS-1100-R

Eaton - Electronics DivisionIn Stock: 863CS-1100-R Datasheet

Current PartRFQ

FIS111NL

Pulse ElectronicsIn Stock: 1555FIS111NL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CS-1100-R are identified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Current Ratio: 100:1 (1:100 turns ratio)
• DC Resistance: 1.3Ohm (maximum tolerance)
• Inductance: 22 mH to 22.4 mH range
• Mounting Type: Through Hole
• Termination Style: PC Pin
• Type: Non-Invasive (Solid Core)

Secondary Compatibility Factors:

• Physical dimensions within acceptable PCB layout tolerances
• Frequency range compatibility (minimum 200kHz operation)
• Moisture Sensitivity Level classification

The FIS111NL from Pulse Electronics meets these substitution criteria and is classified as an active product with current manufacturing availability.

Parameter Comparison

Engineering Selection Recommendations

FIS111NL as Primary Substitute:

The FIS111NL from Pulse Electronics is the qualified substitute for the obsolete CS-1100-R based on the following engineering factors:

1. Electrical Equivalence: Identical current ratio (100:1), DC resistance (1.3Ohm maximum), and inductance (22 mH) within specified tolerances.

2. Mechanical Compatibility: Through hole mounting with PC pin termination and physical dimensions equivalent to the original component, supporting direct PCB layout compatibility.

3. Frequency Performance: Specified maximum frequency of 200kHz satisfies the upper operating range of the CS-1100-R and covers the critical frequency band for current sense transformer applications.

4. Product Status and Availability: FIS111NL is classified as active with documented inventory availability (1520 pieces in stock), ensuring supply chain continuity for replacement and new production requirements.

5. Regulatory Compliance: FIS111NL carries ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements for electronic component procurement.

Current Rating Consideration:

The FIS111NL is rated for 15 A maximum current, compared to the CS-1100-R 20 A rating. This difference requires application-level verification to confirm that the 15 A rating is acceptable for the specific circuit implementation. If the application circuit operates at or above 15 A continuous current, alternative substitutes must be evaluated.

Frequently Asked Questions (FAQ)

Q: Can the FIS111NL directly replace the CS-1100-R in existing PCB designs?

A: The FIS111NL is mechanically and electrically compatible for direct PCB substitution based on equivalent through hole mounting, PC pin termination, and dimensionally equivalent form factor. However, the 15 A current rating of the FIS111NL versus the 20 A rating of the CS-1100-R must be verified against the actual circuit current requirements before implementation.

Q: What is the significance of the current ratio 100:1 or 1:100 notation?

A: Both notations represent the same transformer ratio. The CS-1100-R specifies "Current Ratio: 100:1" while the FIS111NL specifies "Turns Ratio - Primary:Secondary: 1:100." These are equivalent expressions of the same 100:1 transformation ratio used for current sensing applications.

Q: Are there differences in frequency response between the CS-1100-R and FIS111NL?

A: The CS-1100-R operates across 20kHz to 200kHz. The FIS111NL specifies a maximum frequency of 200kHz. The FIS111NL covers the upper frequency range of the original component. Applications requiring operation below 20kHz should be evaluated against the FIS111NL frequency characteristics.

Q: What does the ET (Volt-Time) specification of 350VµS on the FIS111NL indicate?

A: The ET (Volt-Time) product of 350VµS is a core characteristic that defines the maximum volt-second product the transformer can handle without saturation. This specification is provided for the FIS111NL but was not specified for the CS-1100-R in available documentation.

Q: Is the FIS111NL RoHS compliant?

A: Yes, the FIS111NL is ROHS3 compliant and REACH unaffected, meeting current environmental standards for electronic component manufacturing and procurement.

Q: What is the packaging difference between the two parts?

A: The CS-1100-R packaging is listed as "-" (not specified in available data). The FIS111NL is supplied in Tube packaging. Both components use identical through hole PC pin termination for PCB assembly.

Q: Can the FIS111NL be used in applications requiring the full 20 A rating of the CS-1100-R?

A: The FIS111NL maximum current rating is 15 A. Applications requiring sustained operation at 16 A to 20 A must be evaluated for alternative substitutes or confirmed that the circuit operates within the 15 A maximum rating of the FIS111NL.