RN143-2-02 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The RN143-2-02 is a 10 mH common mode choke designed for power line filtering applications in two-line configurations. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs. The part features through-hole mounting with a 2A typical current rating and 230 mOhm DC resistance, suitable for EMI suppression in industrial and commercial power distribution circuits.

Substiute Parts

RN143-2-02

Schaffner EMC Inc.In Stock: 1099RN143-2-02 Datasheet

Current PartRFQ

RN143-2-02-10M

Schaffner EMC Inc.In Stock: 1407RN143-2-02-10M Datasheet

DirectRFQ

PE-62891NL

Pulse ElectronicsIn Stock: 754PE-62891NL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RN143-2-02 are classified based on the following critical parameters that determine functional equivalence:

Direct Equivalent (RN143-2-02-10M): This Schaffner part maintains identical inductance (10 mH @ 10 kHz), number of lines (2), mounting type (through hole), and physical dimensions. The DC resistance is within acceptable tolerance (240 mOhm vs. 230 mOhm). The primary difference is product status (active vs. obsolete) and packaging format (tube vs. unspecified). AC voltage rating increases to 300V, and operating temperature range is -40°C ~ 100°C. This part is the preferred direct replacement.

Similar Substitute (PE-62891NL): This Pulse Electronics part maintains the same inductance value (10 mH), number of lines (2), mounting type (through hole), and DC resistance (240 mOhm). However, the inductance is specified at 1 kHz rather than 10 kHz. Current rating is reduced to 1.8A, and physical dimensions are slightly smaller (31.75mm L x 31.75mm W x 15.49mm H). This part is suitable where space constraints exist and the lower current rating is acceptable.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: RN143-2-02-10M

The RN143-2-02-10M is the recommended direct replacement for the obsolete RN143-2-02. Both parts are manufactured by Schaffner EMC Inc. and share identical electrical specifications (10 mH @ 10 kHz, 2A current rating) and physical form factor. The RN143-2-02-10M is currently in active production status with higher inventory availability (1372 pcs vs. 1061 pcs). This part carries ROHS3 compliance and holds approvals from ENEC, UR, and VDE, providing enhanced regulatory coverage compared to the original part. The AC voltage rating improvement to 300V offers additional design margin. The operating temperature range reduction to -40°C ~ 100°C should be evaluated against application requirements.

Secondary Selection: PE-62891NL

The PE-62891NL from Pulse Electronics is suitable as an alternative where PCB space is constrained. The reduced physical dimensions (approximately 4% smaller in length and width, 23% smaller in height) may enable board redesign benefits. However, the 1.8A current rating represents a 10% reduction from the original specification, requiring verification that application current demands do not exceed this limit. The inductance measurement frequency differs (1 kHz vs. 10 kHz), which may result in different impedance characteristics at higher frequencies. This part maintains RoHS compliance and the full operating temperature range of -40°C ~ 125°C.

Frequently Asked Questions (FAQ)

Q: Can RN143-2-02-10M be used as a direct drop-in replacement for RN143-2-02?

A: Yes. Both parts share identical inductance specifications (10 mH @ 10 kHz), current ratings (2A), DC resistance (within 10 mOhm tolerance), mounting type (through hole), and physical dimensions (33.10mm x 32.50mm x 20.00mm). The RN143-2-02-10M is the direct equivalent and requires no circuit modifications.

Q: What are the limitations of using PE-62891NL as a substitute?

A: The PE-62891NL has a reduced maximum current rating of 1.8A compared to 2A for the original part. Additionally, inductance is specified at 1 kHz rather than 10 kHz, which may affect frequency response characteristics. Physical dimensions are smaller, which may require PCB layout verification. AC voltage rating is not specified for this part.

Q: Are all substitute parts RoHS compliant?

A: Yes. RN143-2-02-10M carries ROHS3 compliance, and PE-62891NL carries RoHS compliance. Both meet current environmental regulations.

Q: What is the difference between the packaging formats?

A: The original RN143-2-02 packaging format is not specified. The RN143-2-02-10M is supplied in tube packaging, which is standard for through-hole components and facilitates automated assembly. PE-62891NL packaging format is also not specified. Tube packaging is compatible with standard pick-and-place equipment for production environments.

Q: Which substitute part should be selected for new designs?

A: For new designs, RN143-2-02-10M is the recommended choice due to active production status, higher current rating capacity, and improved AC voltage rating (300V). PE-62891NL should be considered only when space constraints justify the trade-offs in current rating and frequency response characteristics.