RN114-2-02 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The RN114-2-02 is a 4.2 mH common mode choke designed for two-line power line filtering applications. This through-hole component is rated for 2A typical current with 102 mOhm DC resistance and operates across -40°C to 125°C. The part is classified as obsolete, making identification of suitable substitutes necessary for ongoing design support and procurement continuity.

Substiute Parts

RN114-2-02

Schaffner EMC Inc.In Stock: 1701RN114-2-02 Datasheet

Current PartRFQ

RN114-2-02-4M2

Schaffner EMC Inc.In Stock: 10356RN114-2-02-4M2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The RN114-2-02-4M2 qualifies as a direct substitute based on the following alignment of critical parameters:

• Inductance Value: Both parts maintain 4.2 mH inductance, with measurement frequency difference (1 kHz vs 10 kHz) reflecting standard industry measurement practices for the same component family
• Current Rating: Both rated for 2A, ensuring equivalent power handling capability
• DC Resistance: RN114-2-02-4M2 exhibits 100 mOhm (Typ), within acceptable tolerance of the original 102 mOhm specification
• Number of Lines: Both are 2-line common mode chokes
• Mounting Configuration: Identical through-hole mounting with horizontal, 4-pin package
• Physical Footprint: Exact dimensional match (22.50mm x 21.50mm x 14.60mm)
• Voltage Rating: RN114-2-02-4M2 rated for 300V AC, exceeding the original 250V specification
• Compliance: Both RoHS compliant and REACH unaffected

Parameter Comparison

Engineering Selection Recommendations

The RN114-2-02-4M2 is the direct substitute for the obsolete RN114-2-02. Selection is supported by:

• Product Status: The substitute is active production, ensuring long-term availability and supply chain stability
• Regulatory Compliance: Both parts maintain UR and VDE certifications. The substitute adds ENEC certification, providing expanded compliance coverage
• Electrical Equivalence: Inductance, current rating, and DC resistance remain within specification tolerance
• Physical Compatibility: Identical footprint and mounting configuration enable direct PCB replacement without layout modification
• Enhanced Voltage Rating: The 300V AC rating of the substitute provides margin above the original 250V specification
• Temperature Derating: The substitute operates to 100°C maximum versus 125°C for the original. Applications requiring operation above 100°C require thermal analysis

Frequently Asked Questions (FAQ)

Q: Can RN114-2-02-4M2 be used as a direct replacement on existing PCBs designed for RN114-2-02?

A: Yes. Both parts share identical physical dimensions, pin configuration, and mounting type. No PCB layout changes are required.

Q: What is the significance of the different inductance measurement frequencies (1 kHz vs 10 kHz)?

A: Both measurements represent the same 4.2 mH inductance value. The measurement frequency difference reflects standard industry practice for common mode choke characterization within the RN114 series. The inductance value is equivalent for circuit design purposes.

Q: Are there any thermal operating range limitations when substituting?

A: The RN114-2-02-4M2 is rated to 100°C maximum operating temperature, compared to 125°C for the original part. Applications requiring sustained operation above 100°C should be evaluated for thermal margin. Applications operating within -40°C to 100°C experience no thermal limitation.

Q: Does the lower DC resistance of the substitute (100 mOhm vs 102 mOhm) affect circuit performance?

A: No. The 2 mOhm difference is within normal manufacturing tolerance and does not produce measurable circuit performance variation in typical power line filtering applications.

Q: What packaging differences exist between these parts?

A: The original RN114-2-02 is supplied in standard packaging. The substitute RN114-2-02-4M2 is supplied in tube packaging. Both are through-hole components with identical form factors. Tube packaging is standard for active production parts and does not affect component functionality or PCB assembly compatibility.

Q: Are both parts RoHS compliant?

A: Yes. The original is RoHS Compliant. The substitute is ROHS3 Compliant, representing current RoHS directive compliance. Both are REACH unaffected.