PM3700-70 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The PM3700-70 is a 10 mH Common Mode Choke (CMC) manufactured by Bourns Inc., designed for 2-line surface mount applications with a maximum current rating of 1.5A and DC resistance of 150mOhm. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing production and maintenance applications. The PM3700 series provides electromagnetic interference (EMI) filtering in power distribution and signal integrity circuits where common mode noise rejection is required.

Substiute Parts

PM3700-70

Bourns Inc.In Stock: 954PM3700-70 Datasheet

Current PartRFQ

PM3700-70-RC

Bourns Inc.In Stock: 1356PM3700-70-RC Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PM3700-70 is determined by strict equivalence across the following critical parameters:

• Inductance Value: 10 mH @ 1 kHz (exact match required)
• Number of Lines: 2-line configuration (exact match required)
• Current Rating: 1.5A maximum (exact match required)
• DC Resistance: 150mOhm maximum (exact match required)
• Operating Temperature: -55°C ~ 125°C (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Physical Dimensions: 0.850" L x 0.850" W x 0.450" H maximum (exact match required)
• Package Configuration: Horizontal, 4 PC Pad (exact match required)

The PM3700-70-RC meets all electrical and mechanical parameters specified above, qualifying it as a parametric equivalent substitute. The primary distinction between these parts is packaging format and product status.

Parameter Comparison

Engineering Selection Recommendations

The PM3700-70-RC is the direct substitute for the obsolete PM3700-70. Both parts are electrically and mechanically identical across all functional parameters. Selection between these parts is determined by application requirements and regulatory compliance:

Use PM3700-70-RC when:

• New designs or production runs require active component availability
• RoHS3 compliance is mandated by application or regulatory requirements
• Tape & Reel packaging is compatible with assembly processes
• Long-term supply chain continuity is required

Use PM3700-70 when:

• Existing inventory must be consumed prior to transition
• Legacy applications explicitly require the original part number
• RoHS non-compliance is acceptable for the application

Both parts maintain identical electrical performance, thermal characteristics, and physical form factor, ensuring direct functional interchangeability in circuit applications.

Frequently Asked Questions (FAQ)

Q: Can PM3700-70-RC be used as a direct replacement for PM3700-70?

A: Yes. The PM3700-70-RC is a parametric equivalent with identical inductance (10 mH @ 1 kHz), current rating (1.5A), DC resistance (150mOhm), operating temperature range (-55°C ~ 125°C), and physical dimensions. Both parts are manufactured by Bourns Inc. in the PM3700 series with identical electrical and mechanical specifications.

Q: What is the difference between PM3700-70 and PM3700-70-RC?

A: The primary differences are product status, packaging format, and RoHS compliance. PM3700-70 is obsolete and supplied in bulk packaging with RoHS non-compliant status. PM3700-70-RC is active, supplied in Tape & Reel (TR) format, and ROHS3 compliant. All electrical and mechanical parameters are identical.

Q: Does the Tape & Reel packaging of PM3700-70-RC affect compatibility?

A: No. Tape & Reel packaging is a supply format that does not affect component electrical performance or physical form factor. The component itself maintains identical dimensions (0.850" L x 0.850" W x 0.450" H) and mounting characteristics. Tape & Reel format is standard for automated assembly processes.

Q: Is RoHS3 compliance required for my application?

A: RoHS3 compliance is determined by application regulatory requirements and end-use market. If your application or customer requires RoHS compliance, PM3700-70-RC is the appropriate selection. If RoHS compliance is not required, both parts are functionally equivalent.

Q: Can I mix PM3700-70 and PM3700-70-RC in the same production run?

A: Yes. Both parts are parametrically identical and will perform identically in circuit applications. However, component traceability and compliance documentation should reflect the specific part numbers used in each assembly.

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

A: Both PM3700-70 and PM3700-70-RC have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. These parts do not require special moisture control during storage or handling.