RN202-1-02 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The RN202-1-02 is a 3 mH common mode choke (CMC) designed for two-line power line filtering applications. Manufactured by Schaffner EMC Inc., this through-hole component is rated for 1A typical current with a DC resistance of 205 mOhm. The part is classified as obsolete, making identification of suitable substitutes essential for ongoing design support and procurement continuity.

Substiute Parts

RN202-1-02

Schaffner EMC Inc.In Stock: 2089RN202-1-02 Datasheet

Current PartRFQ

RN202-1-02-3M0

Schaffner EMC Inc.In Stock: 1969RN202-1-02-3M0 Datasheet

DirectRFQ

B82720K2102N040

EPCOS - TDK ElectronicsIn Stock: 5125B82720K2102N040 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RN202-1-02 is determined by the following critical parameters:

• Inductance Value: 3 mH @ 10 kHz (exact match required)
• Number of Lines: 2-line configuration (exact match required)
• Current Rating: 1A minimum (equal or higher acceptable)
• Mounting Type: Through Hole (exact match required)
• Package Configuration: Vertical, 4 PC Pin (exact match required)
• DC Resistance: Within acceptable tolerance range for power line filtering applications
• Voltage Rating - AC: Minimum 250V (equal or higher acceptable)
• Operating Temperature Range: Must support -40°C minimum and 125°C maximum or equivalent
• Regulatory Compliance: UR and VDE certifications required

Two substitute parts meet these criteria:

1. RN202-1-02-3M0 (Schaffner EMC Inc.) – Direct manufacturer successor with active product status
2. B82720K2102N040 (EPCOS - TDK Electronics) – Cross-manufacturer equivalent with comparable electrical specifications

Parameter Comparison

Engineering Selection Recommendations

RN202-1-02-3M0 is the primary recommended substitute. As a direct manufacturer part from Schaffner EMC Inc., it maintains design continuity with the original RN202-1-02. This part carries active product status, ensuring long-term availability and supply chain stability. It meets all critical electrical parameters with marginally higher DC resistance (210 mOhm vs. 205 mOhm) and enhanced AC voltage rating (300V vs. 250V). Regulatory compliance includes ENEC, UR, and VDE certifications. The only consideration is the reduced upper operating temperature limit (100°C vs. 125°C), which must be evaluated against specific application thermal requirements.

B82720K2102N040 serves as a secondary cross-manufacturer alternative from EPCOS - TDK Electronics. This part maintains electrical equivalence with identical inductance, current rating, and frequency specifications. DC resistance is slightly elevated at 220 mOhm. The part retains the full operating temperature range (-40°C ~ 125°C) and holds UR, VDE, and ENEC certifications. Physical dimensions differ slightly (13.00mm L x 9.50mm W vs. 18.20mm L x 8.80mm W), requiring PCB layout verification before implementation. REACH compliance status differs from the original part.

Frequently Asked Questions (FAQ)

Q: Can RN202-1-02-3M0 be used as a direct drop-in replacement for RN202-1-02?

A: Yes, with thermal consideration. The RN202-1-02-3M0 maintains identical mounting type, package configuration, and electrical specifications. The upper operating temperature limit is reduced from 125°C to 100°C. If the application operates consistently below 100°C, substitution is direct. Applications requiring sustained operation above 100°C require thermal analysis.

Q: What is the significance of the DC resistance difference between these parts?

A: DC resistance values of 205 mOhm, 210 mOhm, and 220 mOhm represent normal manufacturing tolerance variation within the 2-line common mode choke category. For power line filtering, these differences result in negligible power dissipation variance at 1A operation (approximately 0.2 mW to 0.22 mW). All three values are functionally equivalent for this application class.

Q: Are there physical dimension constraints when selecting between RN202-1-02-3M0 and B82720K2102N040?

A: Yes. The RN202-1-02 and RN202-1-02-3M0 share identical dimensions (18.20mm L x 8.80mm W x 13.80mm H). The B82720K2102N040 has different dimensions (13.00mm L x 9.50mm W x 14.00mm H). PCB layout and component spacing must be verified before substituting with the EPCOS part.

Q: Which substitute part offers the best long-term supply availability?

A: RN202-1-02-3M0 is the recommended choice for supply continuity. As an active product from the original manufacturer, it benefits from established production and distribution channels. Current inventory shows 1,892 pieces in stock. B82720K2102N040 is also active with higher inventory (5,042 pieces), but cross-manufacturer sourcing introduces additional qualification requirements.

Q: Do all substitute parts meet the original regulatory certifications?

A: Both substitutes exceed the original certification requirements. The RN202-1-02 holds UR and VDE approvals. RN202-1-02-3M0 adds ENEC certification. B82720K2102N040 includes ENEC, UR, and VDE certifications. All parts maintain RoHS3 compliance and EAR99 export classification.