FN686-36-23 Equivalent & Substitute Parts

Part Overview

The FN686-36-23 is a single-phase EMC/EMI line filter manufactured by Schaffner EMC Inc., rated for 250VAC at 36A with a two-stage configuration and terminal block termination. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system maintenance and new design implementations. The filter operates across DC to 400Hz frequency range and is approved by CSA, ENEC, and UR agencies.

Substiute Parts

FN686-36-23

Schaffner EMC Inc.In Stock: 947FN686-36-23 Datasheet

Current PartRFQ

FN2070-36-08

Schaffner EMC Inc.In Stock: 1110FN2070-36-08 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The FN2070-36-08 qualifies as a substitute for the FN686-36-23 based on the following critical parameters:

• Current Rating: Both parts are rated for 36A, matching the primary load-handling requirement
• Filter Type & Configuration: Both are single-phase, two-stage EMC/EMI line filters
• Frequency Range: Both operate across DC ~ 400Hz
• Mounting Type: Both are chassis mount designs
• Operating Temperature: Both support -25°C ~ 100°C range
• Approval Agencies: Both carry CSA, ENEC, and UR certifications
• Voltage Compatibility: The FN2070-36-08 supports dual voltage operation (110V/250VAC), encompassing the 250V requirement of the FN686-36-23

The primary difference lies in termination style: the FN686-36-23 uses terminal block termination, while the FN2070-36-08 uses threaded post (M4) termination. This represents a mechanical interface change requiring connector adaptation during installation.

Parameter Comparison

Engineering Selection Recommendations

The FN2070-36-08 is the designated substitute for the obsolete FN686-36-23. Both components maintain identical electrical performance specifications across current rating, voltage operation, frequency range, and thermal operating envelope. Both carry equivalent regulatory approvals (CSA, ENEC, UR) and meet RoHS compliance requirements.

The FN2070-36-08 offers the advantage of active product status, ensuring continued availability and supply chain reliability. The higher inductance value (1.23mH versus 800µH) provides enhanced filtering performance. The shift from terminal block to threaded post (M4) termination requires mechanical interface modification but does not affect electrical compatibility when properly adapted.

Frequently Asked Questions (FAQ)

Q: Can the FN2070-36-08 directly replace the FN686-36-23 without modification?

A: Electrical substitution is valid. Mechanical adaptation is required due to termination style differences. The FN686-36-23 uses terminal block connections, while the FN2070-36-08 uses M4 threaded posts. Connector hardware must be changed accordingly.

Q: Are the voltage ratings compatible?

A: Yes. The FN686-36-23 is rated for 250VAC. The FN2070-36-08 supports both 110V and 250VAC operation, making it suitable for the 250V requirement and providing additional flexibility for dual-voltage applications.

Q: What is the significance of the inductance difference?

A: The FN2070-36-08 has higher inductance (1.23mH) compared to the FN686-36-23 (800µH). Higher inductance improves EMI filtering performance. This represents an enhancement rather than a limitation for EMC/EMI applications.

Q: Are both parts certified to the same standards?

A: Yes. Both the FN686-36-23 and FN2070-36-08 carry identical regulatory approvals: CSA, ENEC, and UR. Both meet RoHS compliance requirements.

Q: Why is the FN686-36-23 listed as obsolete?

A: The FN686-36-23 has reached end-of-life status. The FN2070-36-08 represents the active product line continuation from Schaffner EMC Inc. for this application category.

Q: What is the current availability status?

A: The FN2070-36-08 is an active product with 1027 units in stock. The FN686-36-23 is obsolete but has 871 units available as legacy inventory.