RN122-0.8-02 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The RN122-0.8-02 is a 2-line common mode choke manufactured by Schaffner EMC Inc., designed for power line filtering applications. This component features 39 mH inductance at 1 kHz with an 800 mA current rating and 1 Ohm typical DC resistance. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility for new designs and ongoing production requirements.

Substiute Parts

RN122-0.8-02

Schaffner EMC Inc.In Stock: 713RN122-0.8-02 Datasheet

Current PartRFQ

RN122-0.8-02-39M

Schaffner EMC Inc.In Stock: 1105RN122-0.8-02-39M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN122-0.8-02 is determined by the following critical parameters:

• Inductance Value: 39 mH nominal inductance
• Current Rating: 800 mA maximum current capacity
• DC Resistance: 1 Ohm typical DCR
• Number of Lines: 2-line configuration
• Mounting Type: Through hole package
• Package Configuration: Horizontal, 4 pin package
• Voltage Rating: AC voltage withstand capability
• Regulatory Compliance: UR and VDE certifications

The substitute part RN122-0.8-02-39M maintains the same series designation (RN122), inductance value (39 mH), current rating (800 mA), and DC resistance (1 Ohm). Both parts share identical mounting type, package configuration, and number of lines. The substitute represents an active product status with enhanced regulatory compliance and improved thermal operating range.

Parameter Comparison

Engineering Selection Recommendations

The RN122-0.8-02-39M is the direct active equivalent for the obsolete RN122-0.8-02. Both components maintain identical electrical specifications for inductance value, current rating, and DC resistance. The substitute part offers enhanced regulatory compliance with ENEC certification in addition to existing UR and VDE approvals. The substitute features improved RoHS3 compliance status and a higher AC voltage rating of 300 V compared to 250 V on the main part.

Physical dimensions of the substitute are reduced, with a smaller footprint (22.50 mm x 21.50 mm versus 28.00 mm x 27.00 mm) and lower profile height (14.60 mm versus 16.80 mm). This dimensional reduction may require PCB layout verification for existing designs. The substitute operates within a narrower maximum temperature range (-40°C to 100°C versus -40°C to 125°C), which should be evaluated against application thermal requirements.

Frequently Asked Questions (FAQ)

Q: Can RN122-0.8-02-39M directly replace RN122-0.8-02 in existing designs?

A: Electrical substitution is valid based on matching inductance (39 mH), current rating (800 mA), and DC resistance (1 Ohm) specifications. PCB layout verification is required due to reduced physical dimensions of the substitute part.

Q: What is the difference between inductance measured at 1 kHz versus 10 kHz?

A: The main part specifies inductance at 1 kHz measurement frequency, while the substitute specifies inductance at 10 kHz. Both maintain the same 39 mH nominal value. Measurement frequency differences reflect standard industry testing protocols and do not indicate functional incompatibility.

Q: Are there thermal operating range differences between these parts?

A: The main part operates from -40°C to 125°C, while the substitute operates from -40°C to 100°C. Applications requiring operation above 100°C must retain the original part or evaluate alternative solutions.

Q: What packaging differences exist between these parts?

A: Both parts use through-hole mounting with horizontal, 4-pin package configuration. The main part ships in standard packaging, while the substitute is supplied in tube packaging. This affects handling and assembly processes but not electrical performance.

Q: Does the higher AC voltage rating of the substitute affect compatibility?

A: The substitute's 300 V AC rating exceeds the main part's 250 V rating, providing enhanced voltage margin. This represents an improvement for applications operating at or near 250 V AC.