74F156AP-RC Equivalent & Substitute Parts

Part Overview

The 74F156AP-RC is a 1.5 µH unshielded wirewound inductor manufactured by Bourns Inc., rated for 900 mA continuous current with a maximum DC resistance of 250mOhm. Designed for through-hole axial mounting, this component operates across the industrial temperature range of -55°C to 125°C and is ROHS3 compliant.

The 74F156AP-RC is classified as obsolete. Locating equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades where this inductor specification is required.

Key Parameters

Parameter	Value
Inductance	1.5 µH
Inductance Tolerance	±20%
Current Rating	900 mA
DC Resistance (DCR)	250mOhm Max
Shielding	Unshielded
Core Material	Phenolic
Operating Temperature Range	-55°C ~ 125°C
Mounting Type	Through Hole
Package Type	Axial
Self Resonant Frequency	160 MHz
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the 74F156AP-RC is determined by strict equivalence across the following critical parameters:

Inductance Value: Must be 1.5 µH
Mounting Configuration: Through-hole axial package only
Shielding Type: Unshielded construction
Core Material: Phenolic core
Operating Temperature Range: -55°C to 125°C minimum
Self Resonant Frequency: 160 MHz
Regulatory Compliance: ROHS3 compliant

The substitute part 2150R-06K meets all these core requirements. Variations in current rating, DC resistance, and inductance tolerance are acceptable within the bounds of circuit design margins, provided the substitute part does not reduce performance below the minimum threshold required by the application.

Parameter Comparison

Parameter	74F156AP-RC (Bourns)	2150R-06K (API Delevan)	Compatibility
Inductance	1.5 µH	1.5 µH	Equivalent
Inductance Tolerance	±20%	±10%	Substitute tighter
Current Rating	900 mA	1.05 A	Substitute higher
DC Resistance (DCR)	250mOhm Max	280mOhm Max	Substitute slightly higher
Shielding	Unshielded	Unshielded	Equivalent
Core Material	Phenolic	Phenolic	Equivalent
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
Package / Case	Axial	Axial	Equivalent
Self Resonant Frequency	160 MHz	160 MHz	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Product Status	Obsolete	Active	Substitute available

Engineering Selection Recommendations

The 2150R-06K from API Delevan Inc. is a direct functional substitute for the obsolete 74F156AP-RC. Both components share identical inductance values, operating temperature ranges, core materials, and regulatory compliance certifications. The 2150R-06K is currently in active production status with confirmed inventory availability (655 pcs), whereas the 74F156AP-RC is obsolete.

The 2150R-06K offers improved specifications in two areas: tighter inductance tolerance (±10% versus ±20%) and higher current rating (1.05 A versus 900 mA). The DC resistance is marginally higher (280mOhm Max versus 250mOhm Max), a difference of 30mOhm that is negligible in most circuit applications. Both components maintain ROHS3 compliance and identical self-resonant frequency characteristics.

Selection of the 2150R-06K eliminates obsolescence risk and provides access to active component inventory for production continuity.

Frequently Asked Questions (FAQ)

Q: Can the 2150R-06K replace the 74F156AP-RC in existing designs?

A: Yes. Both inductors share the same 1.5 µH inductance value, axial through-hole package, phenolic core construction, and operating temperature range. The 2150R-06K is electrically and mechanically compatible as a direct substitute.

Q: What is the significance of the current rating difference (900 mA vs. 1.05 A)?

A: The 2150R-06K has a higher current rating, which provides additional design margin. If the original circuit operates at or below 900 mA, the substitute part will perform identically or better. No circuit modification is required.

Q: Does the DC resistance difference (250mOhm vs. 280mOhm) affect circuit performance?

A: The 30mOhm difference represents a 12% increase in DC resistance. For most applications, this is within acceptable design tolerance. Verify DC resistance impact only if the circuit operates at maximum current levels where resistive losses are critical.

Q: Are both parts physically interchangeable in the PCB layout?

A: Both components use axial through-hole packaging. Physical dimensions differ slightly (74F156AP-RC: 0.200" Dia x 0.500" L; 2150R-06K: 0.220" Dia x 0.560" L). Verify PCB footprint clearance before substitution, particularly in space-constrained layouts.

Q: What is the difference between wirewound and molded inductor construction?

A: The 74F156AP-RC uses wirewound construction; the 2150R-06K uses molded construction. Both achieve the same electrical specifications. Molded inductors typically offer improved mechanical robustness and consistency in mass production environments.

Q: Are both parts ROHS3 compliant?

A: Yes. Both the 74F156AP-RC and 2150R-06K are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message