RN143-1-02 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The RN143-1-02 is a 47 mH 2-line common mode choke manufactured by Schaffner EMC Inc., designed for power line filtering applications in through-hole configurations. This part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design support and procurement continuity. The RN143-1-02 operates at 1 kHz with a 1A typical current rating and 880 mOhm DC resistance, suitable for EMI suppression in power distribution circuits.

Substiute Parts

RN143-1-02

Schaffner EMC Inc.In Stock: 1108RN143-1-02 Datasheet

Current PartRFQ

RN143-1-02-47M

Schaffner EMC Inc.In Stock: 1078RN143-1-02-47M Datasheet

DirectRFQ

B82724B2102N001

EPCOS - TDK ElectronicsIn Stock: 1173B82724B2102N001 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RN143-1-02 are identified based on the following allowable parameter tolerances and compatibility criteria:

Direct Manufacturer Substitute (RN143-1-02-47M): This part maintains the same inductance value (47 mH) and current rating (1A) as the main part. The inductance measurement frequency differs (10 kHz vs. 1 kHz), and DC resistance is marginally higher (890 mOhm vs. 880 mOhm). The AC voltage rating increases to 300V, and operating temperature range is reduced to -40°C ~ 100°C. Physical dimensions and mounting configuration remain identical. This part is active and available in tube packaging.

Similar Manufacturer Substitute (B82724B2102N001): This EPCOS - TDK Electronics component represents a functional alternative with reduced inductance (33 mH @ 10 kHz) and lower DC resistance (750 mOhm). The AC voltage rating matches the main part at 250V, with identical current rating and operating temperature range (-40°C ~ 125°C). Physical dimensions are comparable with minor variations in height (25.00mm vs. 20.00mm). This part is active and available in tray packaging.

Parameter Comparison

Engineering Selection Recommendations

RN143-1-02-47M (Direct Substitute): This part is the primary replacement for the obsolete RN143-1-02. It maintains identical inductance and current specifications with equivalent physical form factor. The part is active and carries expanded regulatory approvals (ENEC, UR, VDE). The reduced operating temperature maximum (-40°C ~ 100°C vs. -40°C ~ 125°C) must be evaluated against application thermal requirements. The increased AC voltage rating (300V) provides additional margin. Packaging format changes from loose to tube, which may affect procurement workflows.

B82724B2102N001 (Similar Substitute): This alternative is suitable for applications where the 33 mH inductance value is acceptable. The lower DC resistance (750 mOhm) reduces power dissipation compared to the main part. The part maintains the full operating temperature range (-40°C ~ 125°C) and carries equivalent regulatory approvals. Physical dimensions increase in height by 5.00mm, requiring PCB layout verification. This part is active with established supply availability in tray packaging.

Frequently Asked Questions (FAQ)

Q: Can RN143-1-02-47M be used as a direct replacement for RN143-1-02?

A: Yes. Both parts maintain 47 mH inductance and 1A current rating with identical physical dimensions and mounting configuration. The inductance measurement frequency differs (10 kHz vs. 1 kHz), and the operating temperature maximum is reduced by 25°C. Verify application thermal requirements before substitution.

Q: What is the primary difference between RN143-1-02-47M and B82724B2102N001?

A: RN143-1-02-47M maintains the 47 mH inductance specification, while B82724B2102N001 provides 33 mH inductance. B82724B2102N001 offers lower DC resistance (750 mOhm vs. 890 mOhm) and increased physical height (25.00mm vs. 20.00mm). Selection depends on circuit inductance requirements and available PCB space.

Q: Are there packaging considerations when switching between these parts?

A: Yes. RN143-1-02 is supplied loose, RN143-1-02-47M in tube packaging, and B82724B2102N001 in tray packaging. These packaging formats affect handling, storage, and automated assembly processes. Verify compatibility with procurement and assembly workflows.

Q: Do all substitute parts meet the same regulatory standards?

A: RN143-1-02 carries UR and VDE approvals. Both substitute parts carry ENEC, UR, and VDE approvals, providing expanded regulatory coverage. All parts are RoHS compliant (RoHS or ROHS3 status).

Q: What is the impact of different inductance measurement frequencies?

A: The main part specifies inductance at 1 kHz, while substitutes specify at 10 kHz. Inductance values vary with frequency due to core material characteristics. Circuit performance depends on actual operating frequency; verify that the specified inductance at the measurement frequency meets circuit requirements.

Q: Can B82724B2102N001 be used if the application requires 47 mH inductance?

A: No. B82724B2102N001 provides 33 mH inductance, which is insufficient for applications requiring 47 mH. Use RN143-1-02-47M for equivalent inductance specifications.