74F186AP-RC Equivalent & Substitute Parts

Part Overview

The 74F186AP-RC is a 1.8 µH unshielded wirewound inductor manufactured by Bourns Inc., rated for 850 mA continuous current with a maximum DC resistance of 280mOhm. This through-hole axial component operates across the temperature range of -55°C to 125°C and is ROHS3 compliant. The product is currently obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

74F186AP-RC

Bourns Inc.In Stock: 86074F186AP-RC Datasheet

Current PartRFQ

2150R-07K

API Delevan Inc.In Stock: 6982150R-07K Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74F186AP-RC is determined by the following critical parameters:

• Inductance Value: Must be 1.8 µH to maintain circuit functionality
• Current Rating: Substitute must support minimum 850 mA; higher ratings are acceptable
• DC Resistance: Lower or equal DCR values are preferred to minimize power loss
• Mounting and Package: Through-hole axial configuration required for mechanical compatibility
• Operating Temperature Range: Must cover -55°C to 125°C minimum
• Shielding Configuration: Unshielded topology must be maintained
• Core Material: Phenolic core material ensures electromagnetic compatibility
• Compliance: ROHS3 compliance required for regulatory alignment

The 2150R-07K from API Delevan Inc. meets these substitution criteria with equivalent inductance, compatible current handling, and matching environmental specifications.

Parameter Comparison

Engineering Selection Recommendations

The 2150R-07K is a direct functional substitute for the 74F186AP-RC. Both components share identical inductance values, phenolic core construction, unshielded topology, and operating temperature specifications. The 2150R-07K offers superior current handling capacity at 915 mA versus 850 mA, and tighter inductance tolerance at ±10% compared to ±20%. The higher self-resonant frequency of 150 MHz provides extended high-frequency performance margin.

The primary design consideration is the increased DC resistance of the 2150R-07K at 370mOhm maximum versus 280mOhm for the original part. This 90mOhm differential results in proportionally higher resistive losses in the inductor. Circuit thermal analysis is required to confirm acceptable power dissipation at the intended operating current.

Both components maintain ROHS3 compliance and are suitable for equivalent regulatory environments. The 2150R-07K is currently in active production status, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the 2150R-07K directly replace the 74F186AP-RC in existing designs?

A: Electrical substitution is valid based on matching inductance, current rating, temperature range, and core material. Physical verification of the axial package dimensions is required, as the 2150R-07K measures 0.220" diameter × 0.560" length compared to the 74F186AP-RC at 0.200" diameter × 0.500" length. PCB layout and component spacing must accommodate the slightly larger form factor.

Q: What is the impact of the higher DC resistance in the 2150R-07K?

A: The 90mOhm increase in maximum DC resistance will result in higher resistive power loss proportional to the square of the operating current. At 850 mA, this represents approximately 65 mW additional dissipation. Thermal design review is necessary to confirm the component remains within acceptable operating temperature limits.

Q: Are there any compliance or certification differences between these parts?

A: Both components are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. No compliance barriers exist for substitution in equivalent regulatory environments.

Q: Why is the inductance tolerance tighter on the 2150R-07K?

A: The 2150R-07K employs molded construction versus the wirewound design of the 74F186AP-RC. Molded inductor manufacturing processes typically achieve tighter tolerance control, resulting in the ±10% specification compared to ±20% for the wirewound variant.

Q: What packaging format is the 2150R-07K supplied in?

A: The 2150R-07K is supplied in Tape & Reel (TR) format, suitable for automated assembly processes. The 74F186AP-RC packaging format is not specified in available documentation.