RN102-1-02 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The RN102-1-02 is a 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 design support and procurement continuity. The RN102-1-02 operates at 1 kHz with a maximum current rating of 1A and is approved for use in applications requiring UR and VDE certifications.

Substiute Parts

RN102-1-02

Schaffner EMC Inc.In Stock: 763RN102-1-02 Datasheet

Current PartRFQ

RN102-1-02-3M0

Schaffner EMC Inc.In Stock: 13100RN102-1-02-3M0 Datasheet

DirectRFQ

B82720A2102N040

EPCOS - TDK ElectronicsIn Stock: 2820B82720A2102N040 Datasheet

SimilarRFQ

B82720K2102N040

EPCOS - TDK ElectronicsIn Stock: 5125B82720K2102N040 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RN102-1-02 is determined by the following critical parameters:

• Inductance Value: 3 mH nominal inductance
• Number of Lines: 2-line configuration for common mode filtering
• Current Rating: 1A maximum continuous current
• Mounting Type: Through-hole package
• DC Resistance: Maximum 220 mOhm (allowing for minor tolerance variations from the original 205 mOhm)
• Voltage Rating - AC: Minimum 250V
• Operating Temperature Range: Support for -40°C to 100°C minimum
• Approval Certifications: UR and VDE compliance required

Three substitute parts meet these criteria: RN102-1-02-3M0 (direct Schaffner equivalent), B82720A2102N040 (EPCOS - TDK Electronics), and B82720K2102N040 (EPCOS - TDK Electronics). All three maintain the core electrical specifications while offering active product status and improved compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

RN102-1-02-3M0 is the primary direct substitute, manufactured by Schaffner EMC Inc. as an active product. This part maintains electrical compatibility with the original RN102-1-02 while offering enhanced certifications (ENEC addition) and improved RoHS3 compliance. The inductance measurement frequency shifts from 1 kHz to 10 kHz, and the operating temperature maximum decreases from 125°C to 100°C. The AC voltage rating increases to 300V, providing additional design margin.

B82720A2102N040 and B82720K2102N040 are EPCOS - TDK Electronics alternatives that maintain the 3 mH inductance, 1A current rating, and 2-line configuration. Both parts are active products with full UR, VDE, and ENEC certifications. The primary distinction between these two EPCOS options is the package orientation: B82720A2102N040 uses horizontal mounting (matching the original RN102-1-02 footprint), while B82720K2102N040 uses vertical mounting. DC resistance values for both EPCOS parts are 220 mOhm, representing a 7.3% increase from the original 205 mOhm specification. Both EPCOS parts maintain the full -40°C to 125°C operating temperature range of the original part.

Selection between these three substitutes depends on PCB layout constraints (horizontal vs. vertical mounting), thermal requirements (100°C vs. 125°C maximum), and supply chain availability. All three parts satisfy the core electrical and certification requirements for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can RN102-1-02-3M0 be used as a direct replacement for RN102-1-02?

A: Yes. RN102-1-02-3M0 is a direct Schaffner equivalent with identical inductance value (3 mH), current rating (1A), and 2-line configuration. The part maintains through-hole mounting and horizontal package orientation. The operating temperature range is reduced from 125°C to 100°C maximum, and the AC voltage rating increases to 300V. These changes are compatible with most applications originally designed for RN102-1-02.

Q: What is the difference between B82720A2102N040 and B82720K2102N040?

A: Both parts are EPCOS - TDK Electronics common mode chokes with identical electrical specifications (3 mH inductance, 1A current rating, 220 mOhm DCR). The primary difference is package orientation: B82720A2102N040 is horizontal (4 PC pin), while B82720K2102N040 is vertical (4 PC pin). Selection depends on PCB layout requirements and available board space.

Q: Are there any compliance differences between the substitute parts?

A: All three substitute parts (RN102-1-02-3M0, B82720A2102N040, B82720K2102N040) meet UR and VDE certifications required by the original RN102-1-02. RN102-1-02-3M0 and both EPCOS parts add ENEC certification. All three are ROHS3 compliant, exceeding the RoHS compliance of the original part.

Q: Does the DC resistance increase from 205 mOhm to 220 mOhm affect circuit performance?

A: The 15 mOhm increase (7.3% tolerance variation) is within typical component manufacturing tolerances. For applications where DCR is critical to circuit function, verify that the increased resistance does not exceed system power dissipation or voltage drop requirements at 1A continuous current.

Q: Can B82720A2102N040 be used in applications requiring -40°C to 125°C operation?

A: Yes. B82720A2102N040 maintains the full -40°C to 125°C operating temperature range of the original RN102-1-02, making it suitable for extended temperature applications.

Q: What is the impact of the inductance measurement frequency change from 1 kHz to 10 kHz?

A: The inductance value remains 3 mH nominal across all substitute parts. The measurement frequency difference reflects standard industry practice for characterizing common mode chokes at higher frequencies. For applications operating in the 1 kHz to 10 kHz range, the inductance performance is equivalent.