PM20-R047M Equivalent & Substitute Parts Reference

Part Overview

The PM20-R047M is a 47 nH unshielded molded inductor manufactured by Bourns Inc., rated for 450 mA with a maximum DC resistance of 300mOhm. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The part operates across a temperature range of -55°C to 125°C and is packaged in the 1210 (3225 Metric) surface mount format.

Substiute Parts

PM20-R047M

Bourns Inc.In Stock: 752PM20-R047M Datasheet

Current PartRFQ

CM453232-100KL

Bourns Inc.In Stock: 45126CM453232-100KL Datasheet

DirectRFQ

1210-470K

API Delevan Inc.In Stock: 9351210-470K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PM20-R047M are identified based on the following critical parameters: inductance value (47 nH), package format (1210 / 3225 Metric), current rating capability (minimum 450 mA), DC resistance specification (300mOhm maximum), and operating temperature range (-55°C to 125°C). Parts meeting these electrical and mechanical criteria are classified as direct or similar substitutes.

The 1210-470K from API Delevan Inc. qualifies as a similar substitute, matching the inductance, package, DC resistance, and temperature range while exceeding the current rating requirement at 636 mA. The CM453232-100KL from Bourns Inc. represents a different inductance value (10 µH) and package size (1812 / 4532 Metric), making it unsuitable for direct substitution in applications requiring the 47 nH specification.

Parameter Comparison

Engineering Selection Recommendations

The 1210-470K from API Delevan Inc. is the appropriate substitute for the PM20-R047M. Both parts share identical inductance (47 nH), package format (1210 / 3225 Metric), DC resistance specification (300mOhm maximum), and operating temperature range (-55°C to 125°C). The 1210-470K provides superior current rating capability (636 mA versus 450 mA) and tighter inductance tolerance (±10% versus ±20%), making it functionally compatible for direct replacement.

The CM453232-100KL does not qualify as a substitute due to fundamentally different electrical specifications: inductance of 10 µH (versus 47 nH), package size of 1812 (versus 1210), and reduced current rating of 250 mA. This part is suitable only for applications requiring 10 µH inductance in the larger 1812 package format.

Both the PM20-R047M and 1210-470K carry RoHS non-compliant status. For applications requiring RoHS3 compliance, the CM453232-100KL meets this requirement, but only if the circuit design can accommodate the different inductance value and package size.

Frequently Asked Questions (FAQ)

Q: Can the 1210-470K directly replace the PM20-R047M in my circuit?

A: Yes. Both parts share the same inductance value (47 nH), package format (1210 / 3225 Metric), DC resistance specification (300mOhm maximum), and operating temperature range. The 1210-470K exceeds the current rating requirement and provides tighter tolerance, making it a compatible substitute.

Q: Why is the CM453232-100KL listed as a substitute if it has different specifications?

A: The CM453232-100KL is not a direct substitute for the PM20-R047M. It is listed in the original part's substitute field but differs significantly in inductance (10 µH versus 47 nH) and package size (1812 versus 1210). This part is only suitable for applications specifically designed for 10 µH inductance.

Q: What is the impact of the ±10% tolerance on the 1210-470K compared to the ±20% tolerance on the PM20-R047M?

A: The tighter ±10% tolerance on the 1210-470K provides more precise inductance values within a narrower range. This is advantageous for circuits requiring tighter inductance specifications and does not create compatibility issues with designs originally specified for ±20% tolerance.

Q: Are there RoHS compliance considerations for this substitution?

A: Both the PM20-R047M and 1210-470K are RoHS non-compliant. If RoHS3 compliance is required, the CM453232-100KL is compliant, but only if your circuit design can accommodate 10 µH inductance and the larger 1812 package format.

Q: What is the difference in physical dimensions between the PM20-R047M and 1210-470K?

A: Both parts use the 1210 (3225 Metric) package with nearly identical dimensions. The PM20-R047M measures 0.126" L × 0.098" W (3.20mm × 2.50mm) with a maximum seated height of 0.087" (2.20mm). The 1210-470K measures 0.128" L × 0.095" W (3.25mm × 2.42mm) with a maximum seated height of 0.101" (2.57mm). These minor variations are within standard PCB layout tolerances.