CMF1-2503SMLF Common Mode Choke Equivalent & Substitute Parts

Part Overview

The CMF1-2503SMLF is a 2-line common mode choke manufactured by Gowanda Electronics, designed for surface mount applications. This component provides 250 µH inductance at 10 kHz with a maximum current rating of 1.7A and 70mOhm DC resistance. The part is Active status and ROHS3 compliant, making it suitable for modern electronic assemblies requiring EMI filtering in power distribution and signal integrity applications. Substitute parts may be required due to inventory constraints, design revisions, or supply chain considerations.

Substiute Parts

CMF1-2503SMLF

Gowanda ElectronicsIn Stock: 860CMF1-2503SMLF Datasheet

Current PartRFQ

PM3700-60-RC

Bourns Inc.In Stock: 4961PM3700-60-RC Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The PM3700-60-RC from Bourns Inc. is identified as a parametric equivalent based on the following allowed substitution criteria:

Both parts share identical core electrical and mechanical compatibility parameters:

• 2-line common mode choke configuration
• Surface mount technology with horizontal, 4 PC pad package
• 70mOhm maximum DC resistance
• -55°C to 125°C operating temperature range
• ROHS3 compliance and MSL 1 rating
• Active product status

The PM3700-60-RC operates at a different inductance specification (5 mH @ 1 kHz versus 250 µH @ 10 kHz) and supports a higher current rating (2A versus 1.7A). These differences reflect design variations within the common mode choke category but do not preclude substitution when application requirements permit higher inductance and current capacity.

Parameter Comparison

Engineering Selection Recommendations

Both the CMF1-2503SMLF and PM3700-60-RC maintain Active product status with full ROHS3 compliance and MSL 1 rating, ensuring long-term availability and environmental regulatory alignment. Selection between these parts should be based on application-specific inductance and current requirements. The CMF1-2503SMLF is specified for 250 µH operation, while the PM3700-60-RC provides 5 mH inductance. The PM3700-60-RC supports higher current capacity at 2A compared to 1.7A for the CMF1-2503SMLF. Both components share identical DC resistance characteristics and thermal operating ranges, supporting equivalent thermal performance in circuit design.

Frequently Asked Questions (FAQ)

Q: Can the PM3700-60-RC directly replace the CMF1-2503SMLF in all applications?

A: Both parts share identical package configuration (Horizontal, 4 PC Pad), mounting type (Surface Mount), DC resistance (70mOhm), and thermal range (-55°C ~ 125°C). However, the inductance values differ significantly (250 µH @ 10 kHz versus 5 mH @ 1 kHz). Substitution is valid only when application circuit design permits the higher inductance specification of the PM3700-60-RC.

Q: What are the key compatibility parameters for these common mode chokes?

A: Critical compatibility parameters include number of lines (both are 2-line), package type (both Horizontal, 4 PC Pad), DC resistance (both 70mOhm maximum), operating temperature range (both -55°C ~ 125°C), and mounting technology (both Surface Mount). These parameters ensure mechanical and electrical interface compatibility.

Q: Are there size differences between these parts?

A: Yes. The CMF1-2503SMLF measures 0.392" L x 0.392" W x 0.235" H (9.95mm x 9.95mm x 5.97mm). The PM3700-60-RC measures 0.850" L x 0.850" W x 0.450" H (21.60mm x 21.60mm x 11.43mm). PCB layout and clearance requirements must accommodate the larger footprint of the PM3700-60-RC.

Q: Do both parts meet current regulatory requirements?

A: Both parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating. Both maintain Active product status, ensuring compliance with current environmental and supply chain standards.