PM20-R10M Equivalent & Substitute Parts Reference

Part Overview

The PM20-R10M is a 100 nH unshielded molded inductor manufactured by Bourns Inc., rated for 450 mA with a maximum DC resistance of 440mOhm. This component is designed for surface mount applications in the 1210 (3225 Metric) package format. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

PM20-R10M

Bourns Inc.In Stock: 1053PM20-R10M Datasheet

Current PartRFQ

CM453232-102KL

Bourns Inc.In Stock: 1687CM453232-102KL Datasheet

DirectRFQ

1210-101K

API Delevan Inc.In Stock: 9031210-101K Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PM20-R10M are identified based on the following critical parameters:

Primary Matching Criteria:

• Inductance value: 100 nH (exact match required)
• Package / Case: 1210 (3225 Metric) surface mount format
• Current rating: minimum 450 mA capability
• DC resistance: maximum 440mOhm
• Operating temperature range: -55°C ~ 125°C minimum

Substitution Logic: The 1210-101K from API Delevan Inc. matches the PM20-R10M on inductance (100 nH), package format (1210), and operating temperature range. This part exceeds the current rating requirement (1.018 A vs. 450 mA) and provides superior DC resistance (200mOhm Max vs. 440mOhm Max), making it a direct functional replacement.

The CM453232-102KL from Bourns Inc. does not qualify as a direct substitute due to significantly different inductance (1 mH vs. 100 nH), package size (1812 vs. 1210), and current rating (30 mA vs. 450 mA). This part represents a different product category and cannot replace the PM20-R10M in applications requiring 100 nH inductance.

Parameter Comparison

Engineering Selection Recommendations

1210-101K (API Delevan Inc.): This part is the appropriate substitute for the PM20-R10M. Both components share identical inductance (100 nH), package format (1210), and operating temperature range (-55°C ~ 125°C). The 1210-101K provides improved performance with tighter inductance tolerance (±10% vs. ±20%), higher current rating (1.018 A vs. 450 mA), and lower DC resistance (200mOhm Max vs. 440mOhm Max). The part is currently in active production status, ensuring long-term availability. Note that both the PM20-R10M and 1210-101K are RoHS non-compliant; if RoHS compliance is required, alternative sourcing strategies must be evaluated.

CM453232-102KL (Bourns Inc.): This part is not suitable as a substitute for the PM20-R10M. The inductance value (1 mH) differs by a factor of 10 from the required 100 nH specification. The package size (1812) is larger than the 1210 format, and the current rating (30 mA) is insufficient for applications requiring 450 mA. While this part offers ROHS3 compliance, it represents a fundamentally different component category and cannot fulfill the electrical requirements of the PM20-R10M application.

Frequently Asked Questions (FAQ)

Q: Can the 1210-101K directly replace the PM20-R10M without circuit modifications?

A: Yes. Both components have identical inductance values (100 nH), operate across the same temperature range (-55°C ~ 125°C), and use the same 1210 surface mount package. The 1210-101K provides superior electrical performance with lower DC resistance and higher current rating, making it a direct functional replacement. No circuit modifications are required.

Q: Why is the CM453232-102KL listed as a substitute if it cannot replace the PM20-R10M?

A: The CM453232-102KL is included in the reference data provided but does not meet the substitution criteria for the PM20-R10M. It is listed to clarify that this part is not a suitable alternative due to fundamental differences in inductance value, package size, and current rating.

Q: What are the key differences between the PM20-R10M and 1210-101K?

A: The primary differences are inductance tolerance (±20% vs. ±10%), current rating (450 mA vs. 1.018 A), and DC resistance (440mOhm Max vs. 200mOhm Max). The 1210-101K offers tighter specifications and improved electrical performance. Both parts share the same inductance value, package format, and operating temperature range.

Q: Are there RoHS compliance considerations when substituting the PM20-R10M?

A: Yes. The PM20-R10M is RoHS non-compliant, and the 1210-101K substitute is also RoHS non-compliant. If RoHS compliance is a design requirement, alternative component sourcing must be evaluated, as neither of these parts meets current RoHS standards.

Q: Does the 1210-101K fit the same PCB footprint as the PM20-R10M?

A: Yes. Both components use the 1210 (3225 Metric) surface mount package format with identical footprint dimensions. The 1210-101K can be placed on the same PCB layout without modification.

Q: What is the minimum current rating required for the PM20-R10M application?

A: The PM20-R10M is rated for 450 mA. Any substitute part must support at least this current level. The 1210-101K exceeds this requirement with a 1.018 A rating, providing design margin for current transients or future application scaling.