PM20-151K Equivalent & Substitute Parts Reference

Part Overview

The PM20-151K is a 150 µH unshielded molded inductor manufactured by Bourns Inc., rated for 65 mA maximum current with 15Ohm maximum DC resistance in a 1210 (3225 Metric) surface mount package. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. Substitute parts must maintain the core electrical specifications while accommodating available alternatives in the current market.

Substiute Parts

PM20-151K

Bourns Inc.In Stock: 1131PM20-151K Datasheet

Current PartRFQ

CM322522-151JL

Bourns Inc.In Stock: 1092CM322522-151JL Datasheet

SimilarRFQ

CM322522-151KL

Bourns Inc.In Stock: 5977CM322522-151KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PM20-151K are identified based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

• Inductance Value: 150 µH (exact match required)
• DC Resistance: 15Ohm Max (must not exceed specification)
• Current Rating: Minimum 50 mA acceptable (original rated 65 mA; substitutes rated 50 mA operate within acceptable margin for most applications)
• Operating Temperature Range: Minimum -40°C ~ 125°C (original -55°C ~ 125°C; substitutes at -40°C ~ 125°C acceptable for standard industrial applications)
• Frequency Characteristics: Q @ 796kHz = 20; Self Resonant Frequency = 8MHz (must match)
• Physical Footprint: 1210 (3225 Metric) package with matching dimensions and height
• Core Material: Ferrite, unshielded construction

The identified substitutes (CM322522-151JL and CM322522-151KL) maintain all critical electrical parameters and physical compatibility while offering improved product status and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The PM20-151K is classified as obsolete. Both substitute parts (CM322522-151JL and CM322522-151KL) are active products with current manufacturing support and availability.

Regulatory Compliance: The PM20-151K is RoHS non-compliant. Both substitute parts are ROHS3 compliant, meeting current environmental and regulatory requirements for new designs and production.

Current Rating Differential: The original part is rated for 65 mA, while substitutes are rated for 50 mA. For applications operating at or below 50 mA, direct substitution is valid. For applications requiring the full 65 mA rating, circuit redesign or alternative component selection is necessary.

Temperature Range: The original part operates from -55°C to 125°C. Substitutes operate from -40°C to 125°C. For applications requiring operation below -40°C, the original specification must be maintained or alternative components selected.

Inductance Tolerance: CM322522-151JL offers ±5% tolerance compared to the ±10% tolerance of both the original and CM322522-151KL. For applications requiring tighter inductance tolerance, CM322522-151JL is the preferred selection.

Frequently Asked Questions (FAQ)

Q: Can CM322522-151JL and CM322522-151KL be used interchangeably with PM20-151K?

A: Both parts maintain the same inductance value (150 µH), DC resistance (15Ohm Max), frequency characteristics (Q @ 796kHz = 20; SRF = 8MHz), and physical dimensions (0.126" L x 0.098" W, 0.087" height). Substitution is valid for applications operating at 50 mA or below and within the -40°C to 125°C temperature range. Applications requiring 65 mA operation or temperatures below -40°C require alternative component selection.

Q: What is the difference between CM322522-151JL and CM322522-151KL?

A: Both parts are identical except for inductance tolerance. CM322522-151JL specifies ±5% tolerance, while CM322522-151KL specifies ±10% tolerance. Selection depends on circuit tolerance requirements.

Q: Are the substitute parts physically compatible with existing PCB layouts designed for PM20-151K?

A: Yes. All three parts share identical physical dimensions (0.126" L x 0.098" W, 3.20mm x 2.50mm) and maximum seated height (0.087", 2.20mm), ensuring direct footprint compatibility on existing PCBs.

Q: What regulatory advantages do the substitute parts offer?

A: Both CM322522-151JL and CM322522-151KL are ROHS3 compliant, whereas PM20-151K is RoHS non-compliant. For new designs and production requiring environmental compliance, the substitute parts meet current regulatory standards.

Q: Are there any performance differences between the molded construction of PM20-151K and the drum core wirewound construction of the substitutes?

A: Both construction types maintain the specified electrical characteristics (inductance, Q factor, self-resonant frequency, and DC resistance). Construction differences do not affect electrical performance within the specified parameters.