PM3700-40 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The PM3700-40 is a 1 mH Common Mode Choke (CMC) rated for 4A maximum current with 20mOhm DC resistance, designed for two-line surface mount applications. This component is classified as obsolete, making identification of suitable substitutes necessary for ongoing production and maintenance requirements. The PM3700-40 operates across a temperature range of -55°C to 125°C and is packaged in a horizontal 4-pad configuration with 0.850" × 0.850" footprint dimensions.

Substiute Parts

PM3700-40

Bourns Inc.In Stock: 1033PM3700-40 Datasheet

Current PartRFQ

PM3700-40-RC

Bourns Inc.In Stock: 5155PM3700-40-RC Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PM3700-40 is determined by strict equivalence across the following critical parameters:

• Inductance value: 1 mH @ 1 kHz
• Number of lines: 2-line configuration
• Current rating: 4A maximum
• DC resistance: 20mOhm maximum
• Operating temperature range: -55°C to 125°C
• Mounting type: Surface Mount
• Physical footprint: 0.850" × 0.850" (21.60mm × 21.60mm)
• Package configuration: Horizontal, 4 PC Pad

The PM3700-40-RC meets all these parameters and is classified as a parametric equivalent within the PM3700 series. The primary distinction between these parts is product status and packaging format.

Parameter Comparison

Engineering Selection Recommendations

The PM3700-40-RC is the direct parametric equivalent for the PM3700-40. Both components share identical electrical and mechanical specifications across all critical parameters. Selection between these parts should be based on the following factors:

Product Status: The PM3700-40 is obsolete, while PM3700-40-RC is active. For new designs and ongoing production, PM3700-40-RC is the appropriate choice to ensure long-term component availability.

Compliance: PM3700-40-RC is ROHS3 compliant, whereas PM3700-40 is RoHS non-compliant. Applications subject to RoHS regulations require PM3700-40-RC.

Packaging: PM3700-40-RC is supplied in Tape & Reel format, suitable for automated assembly processes. PM3700-40 is supplied in bulk packaging. Packaging selection depends on production volume and assembly methodology.

Frequently Asked Questions (FAQ)

Q: Can PM3700-40-RC be used as a direct replacement for PM3700-40?

A: Yes. PM3700-40-RC is a parametric equivalent with identical inductance (1 mH @ 1 kHz), current rating (4A), DC resistance (20mOhm), operating temperature range (-55°C to 125°C), and physical dimensions. Both components are housed in the same Horizontal, 4 PC Pad package configuration with 0.850" × 0.850" footprint.

Q: What is the primary difference between PM3700-40 and PM3700-40-RC?

A: The primary differences are product status, RoHS compliance, and packaging format. PM3700-40-RC is active and ROHS3 compliant, supplied in Tape & Reel packaging. PM3700-40 is obsolete, RoHS non-compliant, and supplied in bulk packaging.

Q: Are there any electrical performance differences between these parts?

A: No. Both parts have identical electrical specifications: 1 mH inductance at 1 kHz, 4A maximum current rating, and 20mOhm maximum DC resistance. Operating temperature range is identical at -55°C to 125°C.

Q: Which part should be selected for new designs?

A: PM3700-40-RC should be selected for new designs. It is active, ROHS3 compliant, and available in standard Tape & Reel packaging for automated assembly.

Q: Is the physical footprint identical between these parts?

A: Yes. Both components have identical dimensions: 0.850" L × 0.850" W (21.60mm × 21.60mm) with maximum height of 0.450" (11.43mm). The package configuration is Horizontal, 4 PC Pad for both parts, ensuring PCB layout compatibility.

Q: What is the Moisture Sensitivity Level (MSL) for these components?

A: Both PM3700-40 and PM3700-40-RC have MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions for storage and handling.