PM5022S-331M Equivalent & Substitute Parts

Part Overview

The PM5022S-331M is a 330 µH shielded drum core, wirewound inductor manufactured by Bourns Inc., rated for 860 mA continuous current with a maximum DC resistance of 780 mOhm. This component operates across the temperature range of -40°C to 85°C and is designed for surface mount applications in nonstandard package configurations.

The PM5022S-331M has reached obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this inductance value and current rating.

Substiute Parts

PM5022S-331M

Bourns Inc.In Stock: 776PM5022S-331M Datasheet

Current PartRFQ

PM5022S-331M-RC

Bourns Inc.In Stock: 1066PM5022S-331M-RC Datasheet

DirectRFQ

SRP7030-1R0M

Bourns Inc.In Stock: 4912SRP7030-1R0M Datasheet

DirectRFQ

SRR1806-331M

Bourns Inc.In Stock: 787SRR1806-331M Datasheet

DirectRFQ

UP5S-331-R

Eaton - Electronics DivisionIn Stock: 754UP5S-331-R Datasheet

DirectRFQ

ASPI-1306S-331M-T

Abracon LLCIn Stock: 753ASPI-1306S-331M-T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PM5022S-331M are classified based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

• Inductance value: 330 µH (±20% tolerance)
• Current rating: minimum 860 mA continuous
• DC resistance: maximum 780 mOhm
• Shielding: shielded configuration required
• Core type: ferrite drum core, wirewound construction
• Mounting: surface mount
• Test frequency: 100 kHz

Substitute Categories:

Direct Equivalents maintain all primary electrical and mechanical parameters within specified tolerances. These parts are pin-compatible and functionally interchangeable without circuit modification.

Functional Equivalents meet or exceed the primary electrical specifications (inductance, current rating, DCR) but may differ in secondary parameters such as saturation current, self-resonant frequency, or physical dimensions. These parts require verification of mechanical fit within the application's PCB layout constraints.

Performance-Enhanced Equivalents exceed the original specifications in one or more critical parameters (higher current rating, lower DCR, improved temperature range) while maintaining the same inductance value and core type. These parts provide design margin improvements.

Parameter Comparison

Engineering Selection Recommendations

PM5022S-331M-RC (Bourns Inc.): This part is the direct successor to the obsolete PM5022S-331M within the same manufacturer's product line. It maintains identical inductance and core type specifications while offering improved product status (active), extended temperature range (-40°C to 125°C), and ROHS3 compliance. The current rating is reduced from 860 mA to 800 mA; applications operating at or below 800 mA continuous current should select this part as the primary replacement.

SRR1806-331M (Bourns Inc.): This part provides equivalent electrical performance to PM5022S-331M-RC with active product status and ROHS3 compliance. It represents an alternative Bourns series offering the same inductance, ferrite drum core construction, and extended temperature range. Selection between PM5022S-331M-RC and SRR1806-331M depends on PCB layout constraints, as physical dimensions differ slightly.

UP5S-331-R (Eaton - Electronics Division): This part exceeds the original specifications with a 900 mA current rating and significantly lower DC resistance (500 mOhm max versus 780 mOhm). It is suitable for applications requiring improved thermal performance or higher current margins. The operating temperature range is limited to -25°C to 85°C, which may restrict use in applications requiring the full -40°C lower limit.

ASPI-1306S-331M-T (Abracon LLC): This part matches the original PM5022S-331M electrical specifications exactly (330 µH, 860 mA, 780 mOhm DCR, ferrite drum core) while offering active product status and ROHS3 compliance. Physical dimensions are nearly identical to the original part. This part is suitable for applications where exact electrical and mechanical compatibility is required.

Frequently Asked Questions (FAQ)

Q: Can PM5022S-331M-RC be used as a direct replacement for PM5022S-331M?

A: PM5022S-331M-RC is functionally equivalent for applications operating at 800 mA or below. The inductance, tolerance, core type, and shielding are identical. The extended temperature range (-40°C to 125°C) provides additional operational margin. Verify that your application's maximum continuous current does not exceed 800 mA.

Q: What is the difference between SRR1806-331M and PM5022S-331M-RC?

A: Both parts share identical electrical specifications (330 µH, 800 mA, 790 mOhm DCR, ferrite drum core, -40°C to 125°C). They differ in physical dimensions and series designation. SRR1806-331M measures 18.30mm × 14.00mm × 7.10mm, while PM5022S-331M-RC measures 18.30mm × 14.00mm × 7.10mm. Verify PCB layout compatibility before selection.

Q: Why does UP5S-331-R have lower DC resistance than the original part?

A: UP5S-331-R achieves 500 mOhm maximum DCR through optimized winding design and core material selection. This results in lower power dissipation and improved thermal performance compared to the 780 mOhm specification of PM5022S-331M. Applications sensitive to inductor losses benefit from this improvement.

Q: Is ASPI-1306S-331M-T suitable for high-temperature applications?

A: ASPI-1306S-331M-T operates across -40°C to 85°C, matching the original PM5022S-331M temperature range. Applications requiring operation above 85°C should select PM5022S-331M-RC or SRR1806-331M, which support -40°C to 125°C.

Q: What packaging formats are available for these substitute parts?

A: PM5022S-331M was supplied in nonstandard packaging. All substitute parts (PM5022S-331M-RC, SRR1806-331M, UP5S-331-R, ASPI-1306S-331M-T) are available in Tape & Reel (TR) packaging, suitable for automated assembly processes.

Q: Are all substitute parts RoHS compliant?

A: PM5022S-331M is RoHS non-compliant. All substitute parts listed (PM5022S-331M-RC, SRR1806-331M, UP5S-331-R, ASPI-1306S-331M-T) are ROHS3 compliant, meeting current environmental regulations.