PM75-120K-RC Equivalent & Substitute Parts

Part Overview

The PM75-120K-RC is a 12 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 2 A continuous current with a maximum DC resistance of 80 mOhm. This surface mount component operates across the temperature range of -40°C to 125°C and is classified as Active product status. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this inductor category.

Key Parameters

Parameter	Value
Inductance	12 µH
Current Rating	2 A
DC Resistance (DCR)	80 mOhm Max
Current - Saturation (Isat)	3 A
Shielding	Unshielded
Core Material	Ferrite
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 125°C
Package Type	Nonstandard
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the PM75-120K-RC is determined by matching the following critical electrical and mechanical parameters:

Inductance value: 12 µH (primary electrical specification)
Current rating: 2 A minimum (load capacity requirement)
DC resistance: 80 mOhm maximum (power loss constraint)
Saturation current: 3 A minimum (headroom specification)
Core type: Ferrite, unshielded (electromagnetic performance)
Mounting: Surface mount, nonstandard package (physical compatibility)
Operating temperature range: -40°C to 125°C (environmental specification)
RoHS3 compliance (regulatory requirement)

The SDR0805-120ML meets these substitution criteria with identical electrical ratings and compatible physical dimensions.

Parameter Comparison

Parameter	PM75-120K-RC	SDR0805-120ML	Match Status
Inductance	12 µH	12 µH	Identical
Tolerance	±10%	±20%	Main part tighter
Current Rating (Amps)	2 A	2 A	Identical
Current - Saturation (Isat)	3 A	3 A	Identical
DC Resistance (DCR)	80 mOhm Max	80 mOhm Max	Identical
Shielding	Unshielded	Unshielded	Identical
Core Material	Ferrite	Ferrite	Identical
Q @ Freq	25 @ 2.52 MHz	25 @ 2.52 MHz	Identical
Frequency - Self Resonant	20 MHz	20 MHz	Identical
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Package / Case	Nonstandard	Nonstandard	Identical
Size / Dimension	0.307" Dia (7.80 mm)	0.307" L x 0.307" W (7.80 mm x 7.80 mm)	Compatible
Height - Seated (Max)	0.209" (5.30 mm)	0.209" (5.30 mm)	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
MSL	1 (Unlimited)	1 (Unlimited)	Identical
REACH Status	REACH Unaffected	REACH Unaffected	Identical
Product Status	Active	Active	Identical

Engineering Selection Recommendations

Both PM75-120K-RC and SDR0805-120ML are Active status products manufactured by Bourns Inc. with full ROHS3 compliance and REACH unaffected status. Selection between these parts is based on the following considerations:

PM75-120K-RC is suitable when inductance tolerance of ±10% is required for tighter circuit performance specifications.

SDR0805-120ML is suitable when inductance tolerance of ±20% is acceptable and alternative sourcing or inventory availability is a consideration.

Both parts satisfy identical electrical performance requirements, thermal operating range, and regulatory compliance. Physical dimensions and mounting characteristics are compatible for PCB layout purposes.

Frequently Asked Questions (FAQ)

Q: Can SDR0805-120ML replace PM75-120K-RC in existing designs?

A: Yes. Both parts share identical inductance (12 µH), current rating (2 A), DC resistance (80 mOhm max), saturation current (3 A), core material (ferrite, unshielded), operating temperature range (-40°C to 125°C), and physical dimensions. The primary difference is inductance tolerance (±20% vs ±10%). Substitution is valid when the circuit design accommodates the wider tolerance specification of the SDR0805-120ML.

Q: What is the difference in inductance tolerance between these parts?

A: PM75-120K-RC has ±10% inductance tolerance, while SDR0805-120ML has ±20% tolerance. For applications requiring tighter inductance accuracy, PM75-120K-RC is the appropriate selection. For applications with broader tolerance margins, SDR0805-120ML is acceptable.

Q: Are the physical dimensions identical?

A: The seated height is identical at 0.209" (5.30 mm). The PM75-120K-RC is specified as 0.307" diameter, while the SDR0805-120ML is specified as 0.307" length by 0.307" width. Both dimensions are compatible for standard PCB footprint placement.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both PM75-120K-RC and SDR0805-120ML are ROHS3 compliant, REACH unaffected, and classified as Active product status by Bourns Inc.

Q: What is the packaging format for both parts?

A: Both parts are supplied in Tape & Reel (TR) packaging format suitable for automated assembly processes.

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