PM40-R15M Equivalent & Substitute Parts

Part Overview

The PM40-R15M is a 150 nH unshielded molded inductor manufactured by Bourns Inc., rated for 450 mA with a maximum DC resistance of 250mOhm. This component operates across a temperature range of -55°C to 125°C in a 1812 (4532 Metric) surface mount package. The part is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and production continuity.

Substiute Parts

PM40-R15M

Bourns Inc.In Stock: 1105PM40-R15M Datasheet

Current PartRFQ

CM453232-R15KL

Bourns Inc.In Stock: 1076CM453232-R15KL Datasheet

DirectRFQ

CM453232-R15ML

Bourns Inc.In Stock: 2817CM453232-R15ML Datasheet

DirectRFQ

1812-151K

API Delevan Inc.In Stock: 9931812-151K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters: identical inductance value (150 nH), compatible package format (1812 / 4532 Metric), surface mount configuration, and electrical performance within acceptable operating ranges. The substitute parts maintain the same inductance specification and package footprint, ensuring mechanical and electrical compatibility. Current rating and DC resistance variations are acceptable provided the substitute meets or exceeds the application requirements. Operating temperature range and shielding characteristics are evaluated for circuit-level compatibility.

Parameter Comparison

Engineering Selection Recommendations

CM453232-R15KL and CM453232-R15ML are direct substitutes manufactured by Bourns Inc. Both parts maintain identical inductance and package specifications while offering improved current ratings (730 mA versus 450 mA) and lower DC resistance (220mOhm versus 250mOhm). Both are ROHS3 compliant and carry active product status, ensuring long-term availability and supply chain stability. CM453232-R15KL features ±10% tolerance; CM453232-R15ML matches the original ±20% tolerance specification.

The 1812-151K from API Delevan Inc. is a similar alternative with identical inductance and package format. It provides the highest current rating (818 mA) and maintains the full operating temperature range (-55°C to 125°C) matching the original part. However, it carries RoHS non-compliant status and remains non-compliant with modern regulatory requirements.

For applications requiring regulatory compliance and supply continuity, CM453232-R15ML is the preferred substitute, offering direct parameter equivalence with active product status and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can CM453232-R15KL and CM453232-R15ML be used interchangeably with PM40-R15M?

A: Both parts are direct substitutes. They maintain identical inductance (150 nH), package format (1812), and mounting type. The primary difference is inductance tolerance: CM453232-R15KL offers ±10% tolerance while CM453232-R15ML matches the original ±20% specification. Selection depends on circuit tolerance requirements.

Q: What are the advantages of using CM453232 series over the original PM40-R15M?

A: The CM453232 series provides higher current ratings (730 mA versus 450 mA), lower DC resistance (220mOhm versus 250mOhm), and improved Q factor (35 versus 30 at 25.2MHz). Both variants are ROHS3 compliant with active product status, ensuring long-term availability.

Q: Is the 1812-151K suitable as a replacement?

A: The 1812-151K maintains identical inductance and package specifications with superior current rating (818 mA) and full temperature range compatibility (-55°C to 125°C). However, it is RoHS non-compliant, which may conflict with regulatory or procurement requirements.

Q: Are there temperature range considerations when substituting?

A: CM453232-R15KL and CM453232-R15ML operate from -40°C to 125°C, which is narrower than the original -55°C to 125°C range. Applications requiring operation below -40°C should use the 1812-151K, which maintains the full -55°C to 125°C range.

Q: How do self-resonant frequency differences affect substitution?

A: The original PM40-R15M has a self-resonant frequency of 450MHz, while CM453232 variants are rated at 250MHz and the 1812-151K at 500MHz. These differences affect high-frequency performance characteristics. Circuit-level evaluation is necessary for applications operating near these frequency boundaries.

Q: What packaging options are available for the substitute parts?

A: CM453232-R15KL and CM453232-R15ML are supplied in Tape & Reel (TR) packaging. The 1812-151K is also available in Tape & Reel format. All maintain the same 1812 (4532 Metric) component package for PCB compatibility.