RN142-4-02 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The RN142-4-02 is a 3.3 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, making equivalent and substitute parts necessary for ongoing procurement and system maintenance. The RN142-4-02 operates at 4A typical current with a DC resistance of 66 mOhm and is rated for 250V AC operation across an operating temperature range of -40°C to 125°C.

Substiute Parts

RN142-4-02

Schaffner EMC Inc.In Stock: 1065RN142-4-02 Datasheet

Current PartRFQ

RN142-4-02-3M3

Schaffner EMC Inc.In Stock: 1136RN142-4-02-3M3 Datasheet

DirectRFQ

B82724A2402N001

EPCOS - TDK ElectronicsIn Stock: 1581B82724A2402N001 Datasheet

SimilarRFQ

B82724J2402N001

EPCOS - TDK ElectronicsIn Stock: 2831B82724J2402N001 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RN142-4-02 is determined by the following critical parameters:

• Inductance value: 3.3 mH (measured at 10 kHz for substitutes, 1 kHz for main part)
• Number of lines: 2-line configuration
• Current rating: 4A minimum
• DC resistance: Within acceptable tolerance (65-67 mOhm range)
• Voltage rating: Minimum 250V AC
• Mounting type: Through hole
• Package configuration: 4-pin horizontal or vertical orientation
• Operating temperature range: Minimum -40°C to 100°C

Substitute parts are grouped into two categories: direct manufacturer alternatives from Schaffner EMC Inc. and cross-manufacturer equivalents from EPCOS - TDK Electronics. All substitutes maintain the core electrical specifications and mechanical compatibility required for power line filtering applications.

Parameter Comparison

Engineering Selection Recommendations

RN142-4-02-3M3 (Schaffner EMC Inc., Active Status)

This direct manufacturer substitute is the primary alternative. It maintains identical electrical specifications with 3.3 mH inductance and 4A current rating. The part offers improved voltage rating (300V vs. 250V) and active product status with extended support. Operating temperature range is reduced to -40°C to 100°C, which is acceptable for most power line filtering applications. Approval certifications include ENEC, UR, and VDE, providing broader regulatory compliance than the original part.

B82724A2402N001 (EPCOS - TDK Electronics, Active Status)

This cross-manufacturer equivalent from EPCOS - TDK Electronics provides full electrical compatibility with DC resistance of 65 mOhm and 4A current rating. The horizontal, 4-pin package maintains identical mechanical footprint compatibility. Operating temperature range matches the original specification (-40°C to 125°C). This part is suitable for applications requiring exact form-factor compatibility and is backed by active product support.

B82724J2402N001 (EPCOS - TDK Electronics, Active Status)

This alternative offers identical electrical specifications but features a vertical, 4-pin package configuration. Physical dimensions differ (1.232" L x 0.728" W x 1.307" H vs. 1.303" L x 1.280" W x 0.787" H), requiring PCB layout modification. This option is applicable only when vertical orientation is acceptable or preferred for space optimization. All electrical and thermal specifications remain compatible with the original design.

Frequently Asked Questions (FAQ)

Q: Can RN142-4-02-3M3 be used as a direct replacement for RN142-4-02?

A: Yes. Both parts share identical inductance (3.3 mH), current rating (4A), and 2-line configuration. The substitute offers higher voltage rating (300V vs. 250V) and broader regulatory certifications. The operating temperature range is reduced to -40°C to 100°C; verify this meets your application requirements.

Q: What is the difference between B82724A2402N001 and B82724J2402N001?

A: Both parts have identical electrical specifications (3.3 mH, 4A, 65 mOhm DCR). The primary difference is package orientation: B82724A2402N001 uses horizontal configuration matching the original RN142-4-02 footprint, while B82724J2402N001 uses vertical configuration with different physical dimensions. Select based on PCB layout requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. RN142-4-02-3M3 is ROHS3 compliant. B82724A2402N001 and B82724J2402N001 are both ROHS3 compliant. The original RN142-4-02 is RoHS compliant. All parts meet current environmental standards.

Q: Which substitute has the best regulatory approval coverage?

A: RN142-4-02-3M3, B82724A2402N001, and B82724J2402N001 all carry ENEC, UR, and VDE certifications, providing broader approval coverage than the original part (UR, VDE only).

Q: Can I use B82724J2402N001 if my PCB layout requires horizontal mounting?

A: No. B82724J2402N001 is configured for vertical mounting with dimensions of 1.232" L x 0.728" W x 1.307" H. For horizontal mounting compatibility, use B82724A2402N001 or RN142-4-02-3M3, both of which maintain the original horizontal, 4-pin package configuration.

Q: What is the DC resistance tolerance across all substitute options?

A: DC resistance values are 66 mOhm (RN142-4-02), 67 mOhm (RN142-4-02-3M3), and 65 mOhm (B82724A2402N001 and B82724J2402N001). All values fall within acceptable tolerance for power line filtering applications with negligible performance variation.