RN242-1-02 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The RN242-1-02 is a 33 mH, 2-line common mode choke manufactured by Schaffner EMC Inc., designed for power line filtering applications in through-hole mounting configurations. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing design support and procurement continuity. The part delivers 1A typical current rating with 810 mOhm DC resistance and operates across -40°C to 125°C temperature range with 250V AC voltage rating.

Substiute Parts

RN242-1-02

Schaffner EMC Inc.In Stock: 1094RN242-1-02 Datasheet

Current PartRFQ

RN242-1-02-33M

Schaffner EMC Inc.In Stock: 1074RN242-1-02-33M Datasheet

DirectRFQ

B82724J2102N001

EPCOS - TDK ElectronicsIn Stock: 1658B82724J2102N001 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RN242-1-02 is determined by the following critical parameters:

• Inductance Value: 33 mH nominal inductance at specified frequency
• Number of Lines: 2-line configuration for common mode filtering
• Current Rating: Minimum 1A capacity
• DC Resistance: Maximum 810 mOhm to maintain electrical performance
• Voltage Rating - AC: Minimum 250V for power line applications
• Operating Temperature Range: Support for -40°C to 125°C operational envelope
• Mounting Type: Through-hole configuration with vertical 4-pin package
• Regulatory Compliance: UR and VDE certifications required

Two substitute parts meet these criteria with documented equivalency:

Direct Substitute: RN242-1-02-33M (Schaffner EMC Inc.) — Same manufacturer, active product status, identical mechanical and electrical specifications with enhanced voltage rating and expanded approval agencies.

Cross-Manufacturer Substitute: B82724J2102N001 (EPCOS - TDK Electronics) — Functionally equivalent with comparable inductance, current rating, and mounting configuration; lower DCR specification (750 mOhm) and compatible dimensional envelope.

Parameter Comparison

Engineering Selection Recommendations

RN242-1-02-33M is the primary substitute for direct replacement. This part maintains identical electrical and mechanical specifications while offering active product status, ensuring long-term availability and supply chain continuity. The higher AC voltage rating (300V) and expanded approval agency certifications (ENEC addition) provide enhanced design margin. The reduced operating temperature maximum (100°C vs. 125°C) requires verification against application thermal requirements.

B82724J2102N001 serves as a cross-manufacturer alternative when RN242-1-02-33M availability is constrained. This EPCOS - TDK Electronics component delivers superior DC resistance performance (750 mOhm vs. 810 mOhm), reducing power dissipation. Dimensional variance (31.30mm L x 18.50mm W x 33.20mm H vs. 31.00mm L x 18.00mm W x 34.60mm H) requires PCB layout verification. Full operating temperature range (-40°C to 125°C) matches the original specification. REACH compliance status differs; applications subject to REACH regulations must confirm applicability.

Both substitutes maintain 2-line common mode choke architecture, 1A current capacity, through-hole mounting, and vertical 4-pin package configuration, ensuring mechanical and electrical compatibility within specified parameter tolerances.

Frequently Asked Questions (FAQ)

Q: Can RN242-1-02-33M directly replace RN242-1-02 in existing designs?

A: Yes. RN242-1-02-33M provides direct functional equivalency with identical inductance value (33 mH), current rating (1A), DC resistance (810 mOhm), mounting type (through-hole), and package configuration (vertical, 4-pin). The reduced maximum operating temperature (100°C vs. 125°C) must be evaluated against application thermal environment.

Q: What are the key differences between RN242-1-02-33M and B82724J2102N001?

A: Both parts deliver 33 mH inductance and 1A current rating in identical through-hole packages. B82724J2102N001 offers lower DC resistance (750 mOhm vs. 810 mOhm), reducing power loss. Dimensional differences are minor (approximately 0.3mm length and width variance, 1.4mm height reduction). Manufacturer origin differs (Schaffner vs. EPCOS - TDK Electronics), affecting supply chain and compliance documentation.

Q: Are dimensional variations between substitutes significant for PCB layout?

A: Dimensional differences between RN242-1-02 and B82724J2102N001 are within typical component tolerance ranges. The 1.4mm height reduction and minor length/width variations require PCB footprint verification to confirm clearance with adjacent components and solder joint accessibility.

Q: Which substitute is preferred for new designs?

A: RN242-1-02-33M is the preferred substitute, maintaining identical specifications and same-manufacturer sourcing. B82724J2102N001 is recommended when RN242-1-02-33M availability is limited or when lower DC resistance performance is advantageous for thermal management.

Q: Do both substitutes meet the original approval requirements?

A: Both substitutes carry UR and VDE certifications matching the original RN242-1-02. RN242-1-02-33M and B82724J2102N001 additionally include ENEC certification, exceeding original approval scope. REACH compliance status differs; B82724J2102N001 is REACH Affected while RN242-1-02-33M is REACH Unaffected.