RN222-1-02 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The RN222-1-02 is a 2-line common mode choke manufactured by Schaffner EMC Inc., designed for power line filtering applications. This component features 18 mH inductance at 1 kHz with a 1A typical current rating and 640 mOhm DC resistance. The part is classified as obsolete, making identification of suitable substitutes necessary for ongoing system support and new designs requiring equivalent filtering performance.

Substiute Parts

RN222-1-02

Schaffner EMC Inc.In Stock: 941RN222-1-02 Datasheet

Current PartRFQ

RN222-1-02-18M

Schaffner EMC Inc.In Stock: 1197RN222-1-02-18M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The RN222-1-02-18M qualifies as a direct substitute based on the following critical parameters:

Matching Parameters:

• Inductance value: 18 mH (measured at different frequencies: 1 kHz vs. 10 kHz, but same nominal value)
• Current rating: 1A
• Number of lines: 2
• Mounting type: Through Hole
• Physical dimensions: Identical footprint (31.00mm x 18.00mm x 29.60mm)
• Package configuration: Vertical, 4 PC Pin
• Filter type: Power Line

Acceptable Variations:

• DC Resistance: 630 mOhm (substitute) vs. 640 mOhm (original) — within typical manufacturing tolerance
• AC Voltage Rating: 300V (substitute) vs. 250V (original) — substitute exceeds original specification
• Operating Temperature: -40°C ~ 100°C (substitute) vs. -40°C ~ 125°C (original) — substitute has narrower range but covers standard industrial operating conditions
• Product Status: Active (substitute) vs. Obsolete (original) — substitute is currently manufactured

Parameter Comparison

Engineering Selection Recommendations

The RN222-1-02-18M is the direct substitute for the obsolete RN222-1-02. Selection is based on the following engineering criteria:

Product Status: The substitute is an active product currently manufactured by Schaffner EMC Inc., ensuring long-term availability and supply chain continuity.

Compliance & Certifications: The substitute maintains all original certifications (UR, VDE) and adds ENEC approval, providing equivalent or enhanced regulatory compliance. Both parts are RoHS compliant, with the substitute meeting ROHS3 standards.

Electrical Performance: The 18 mH inductance value is preserved. The DC resistance differential (630 mOhm vs. 640 mOhm) is negligible and within typical component tolerances. The AC voltage rating of the substitute (300V) exceeds the original specification (250V), providing additional safety margin.

Mechanical Compatibility: Identical physical dimensions and through-hole mounting configuration ensure direct PCB compatibility without layout modifications.

Operating Conditions: The substitute operates across -40°C to 100°C, covering standard industrial temperature ranges. Applications requiring operation above 100°C should be evaluated against specific system requirements.

Frequently Asked Questions (FAQ)

Q: Can RN222-1-02-18M be used as a direct replacement for RN222-1-02?

A: Yes. Both components share identical inductance values (18 mH), current ratings (1A), physical dimensions, and mounting configurations. The substitute is electrically and mechanically compatible with the original design.

Q: What is the significance of the different frequency measurements (1 kHz vs. 10 kHz)?

A: Inductance values are frequency-dependent. The original part specifies 18 mH at 1 kHz, while the substitute specifies 18 mH at 10 kHz. Both maintain the same nominal inductance value across their respective measurement frequencies, ensuring equivalent filtering performance in power line applications.

Q: Does the lower operating temperature range of the substitute affect compatibility?

A: The substitute operates from -40°C to 100°C, compared to the original's -40°C to 125°C range. For applications operating within standard industrial temperature limits (typically -40°C to 85°C or -40°C to 100°C), the substitute is fully compatible. Applications requiring sustained operation above 100°C should verify thermal requirements against system specifications.

Q: Are there packaging differences between the two parts?

A: The original part number does not specify packaging format, while the substitute is supplied in tube packaging. Both maintain identical component form factors and through-hole pin configurations, ensuring PCB assembly compatibility regardless of packaging format.

Q: What certifications does the substitute carry?

A: The RN222-1-02-18M carries UR, VDE, and ENEC approvals, providing equivalent or enhanced regulatory coverage compared to the original part's UR and VDE certifications.