RN122-1-02-1 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The RN122-1-02-1 is a common mode choke manufactured by Schaffner EMC Inc., rated for 18 mH inductance at 1A current. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part is RoHS compliant and carries unlimited moisture sensitivity rating (MSL 1), indicating robust environmental tolerance for industrial applications.

Substiute Parts

RN122-1-02-1

Schaffner EMC Inc.In Stock: 1134RN122-1-02-1 Datasheet

Current PartRFQ

RN122-1-02-10M

Schaffner EMC Inc.In Stock: 1253RN122-1-02-10M Datasheet

DirectRFQ

B82721A2501N001

EPCOS - TDK ElectronicsIn Stock: 1333B82721A2501N001 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RN122-1-02-1 is determined by the following critical parameters:

Primary Substitution Criteria:

• Inductance value: 18 mH (or functionally equivalent within application tolerance)
• Current rating: Minimum 1A
• Mounting type: Through hole configuration
• Number of lines: 2-line common mode choke
• Voltage rating: AC 250V or higher
• Operating temperature range: -40°C minimum to 100°C minimum
• Compliance: RoHS compliant, REACH status acceptable

Substitute Parts Identified:

1. RN122-1-02-10M (Direct Schaffner substitute) – Same manufacturer, active product status, reduced inductance (10 mH) and current rating (1A maintained)
2. B82721A2501N001 (EPCOS/TDK Electronics) – Similar inductance (18 mH), reduced current rating (500 mA), active product status

Parameter Comparison

Engineering Selection Recommendations

RN122-1-02-10M is the primary substitute for direct replacement within Schaffner's product line. This part maintains the same manufacturer, current rating (1A), and mounting configuration. The reduced inductance (10 mH versus 18 mH) requires circuit-level verification to confirm functional equivalence in the target application. This part carries active product status with full RoHS3 compliance and recognized safety certifications (ENEC, UR, VDE).

B82721A2501N001 provides an alternative from EPCOS/TDK Electronics with matching inductance (18 mH) but reduced current capacity (500 mA). This substitution is applicable only in applications where the maximum current requirement does not exceed 500 mA. The part is active, RoHS3 compliant, and carries equivalent safety certifications. Operating temperature range extends to 125°C, providing enhanced thermal margin.

Both substitute parts are currently in active production with confirmed inventory availability, ensuring supply chain continuity for the obsolete RN122-1-02-1.

Frequently Asked Questions (FAQ)

Q: Can RN122-1-02-10M replace RN122-1-02-1 directly?

A: RN122-1-02-10M is a Schaffner product with identical current rating (1A) and mounting type. The inductance difference (10 mH versus 18 mH) must be evaluated against circuit requirements. Direct substitution is possible only if the application tolerates reduced inductance.

Q: What is the current limitation when using B82721A2501N001?

A: B82721A2501N001 is rated for maximum 500 mA continuous current, compared to 1A for the original part. Applications requiring sustained current above 500 mA cannot use this substitute.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both RN122-1-02-10M and B82721A2501N001 are ROHS3 compliant, meeting current environmental regulations.

Q: What are the physical size differences?

A: RN122-1-02-10M measures 22.50 mm L × 21.50 mm W × 14.60 mm H. B82721A2501N001 measures 17.90 mm L × 17.30 mm W × 12.60 mm H. Both use horizontal 4-pin through-hole packages compatible with standard PCB layouts.

Q: Which substitute has better thermal performance?

A: B82721A2501N001 operates to 125°C maximum, versus 100°C for RN122-1-02-10M. However, the reduced current rating (500 mA) of the EPCOS part typically results in lower heat generation in current-limited applications.

Q: Are safety certifications equivalent between substitutes?

A: Both substitute parts carry ENEC, UR, and VDE approvals, matching the certification profile required for power line filtering applications.