RN142-6-02 Equivalent & Substitute Parts

Part Overview

The RN142-6-02 is a 1.8 mH, 2-line common mode choke (CMC) designed for power line filtering applications in through-hole configurations. Manufactured by Schaffner EMC Inc., this component operates at 6A typical current with 20mOhm DC resistance and is rated for 250V AC operation across -40°C to 125°C. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for continued system support and new designs.

Substiute Parts

RN142-6-02

Schaffner EMC Inc.In Stock: 1108RN142-6-02 Datasheet

Current PartRFQ

RN142-6-02-1M8

Schaffner EMC Inc.In Stock: 2279RN142-6-02-1M8 Datasheet

DirectRFQ

B82724A2602N020

EPCOS - TDK ElectronicsIn Stock: 1119B82724A2602N020 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

• Inductance Value: 1.8 mH (frequency-dependent measurement acceptable)
• Number of Lines: 2-line configuration
• Current Rating: 6A minimum
• DC Resistance: Maximum 20mOhm (Typ) for direct substitution; higher DCR values require thermal and performance verification
• Voltage Rating - AC: Minimum 250V
• Operating Temperature: Minimum -40°C to 100°C range
• Mounting Type: Through Hole
• Package / Case: Horizontal, 4 PC Pin
• Physical Footprint: Compatible dimensions (33.10mm x 32.50mm base)

Two substitute parts meet these criteria with varying compliance profiles and minor parameter deviations.

Parameter Comparison

Engineering Selection Recommendations

RN142-6-02-1M8 (Direct Substitute - Preferred)

This part is the primary equivalent for RN142-6-02 replacement. Both are manufactured by Schaffner EMC Inc. within the same RN series. The RN142-6-02-1M8 is active and carries expanded regulatory approvals (ENEC, UR, VDE versus UR, VDE). It maintains identical inductance (1.8 mH), current rating (6A), and DC resistance (20mOhm Typ). The higher AC voltage rating (300V versus 250V) and ROHS3 compliance provide enhanced regulatory alignment. The reduced operating temperature upper limit (100°C versus 125°C) is acceptable for most power line filtering applications. Inductance measurement frequency differs (10 kHz versus 1 kHz), reflecting standard industry practice for active components.

B82724A2602N020 (Similar Substitute - Alternative)

This EPCOS - TDK Electronics part provides functional equivalence with identical inductance (1.8 mH @ 10 kHz), current rating (6A), and physical footprint. It maintains the original operating temperature range (-40°C to 125°C) and AC voltage rating (250V). The elevated DC resistance (31mOhm Typ versus 20mOhm Typ) represents a 55% increase, resulting in higher power dissipation and thermal generation. This parameter deviation requires thermal analysis in applications with sustained 6A operation or elevated ambient temperatures. The part carries ROHS3 compliance and comprehensive regulatory approvals (ENEC, UR, VDE). Physical height is marginally reduced (19.70mm versus 20.00mm), maintaining PCB compatibility.

Frequently Asked Questions (FAQ)

Q: Can RN142-6-02-1M8 directly replace RN142-6-02 without circuit modification?

A: Yes. Both parts share identical inductance (1.8 mH), current rating (6A), DC resistance (20mOhm Typ), and physical footprint. The RN142-6-02-1M8 is the direct successor within the Schaffner RN series. The higher AC voltage rating (300V) and expanded regulatory approvals enhance system margin.

Q: What is the impact of the 31mOhm DCR in B82724A2602N020 compared to 20mOhm in the original?

A: The 55% DCR increase elevates resistive power loss proportionally. At 6A continuous operation, power dissipation increases from 0.72W to 1.12W. This additional heat generation requires verification in thermal-constrained applications or high-ambient-temperature environments. The part remains electrically functional but may require thermal management assessment.

Q: Are there PCB layout compatibility concerns with these substitutes?

A: All three parts maintain the same horizontal, 4-pin through-hole package and base footprint (33.10mm x 32.50mm). The B82724A2602N020 height is 0.3mm lower (19.70mm versus 20.00mm), which does not affect standard PCB clearance or assembly processes.

Q: Which substitute is recommended for new designs?

A: RN142-6-02-1M8 is the recommended choice for new designs. It is the active Schaffner equivalent with identical electrical parameters, expanded regulatory approvals (ENEC addition), and ROHS3 compliance. B82724A2602N020 is suitable where cross-manufacturer sourcing is required or as a secondary supply source, provided thermal analysis confirms DCR tolerance.

Q: What regulatory certifications apply to each part?

A: RN142-6-02 carries UR and VDE approvals. RN142-6-02-1M8 adds ENEC certification (UR, VDE, ENEC). B82724A2602N020 also carries ENEC, UR, and VDE approvals. All three meet RoHS requirements (RoHS Compliant or ROHS3 Compliant).

Q: Is the operating temperature range difference significant?

A: RN142-6-02-1M8 operates to 100°C maximum versus 125°C for the original and B82724A2602N020. For applications with sustained operation near 100°C ambient or high internal dissipation, verify that component temperature remains within the 100°C limit. Most power line filtering applications operate well below this threshold.