28104C Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions Inc. 28104C is a 100 µH unshielded wirewound inductor rated for 1.8 A with a maximum DC resistance of 174mOhm. This surface mount component operates across -40°C to 125°C and is part of the 2800 series. The part is currently obsolete, making equivalent substitutes necessary for ongoing design requirements and production continuity.

Substiute Parts

28104C

Murata Power Solutions Inc.In Stock: 103228104C Datasheet

Current PartRFQ

SDR1806-101KL

Bourns Inc.In Stock: 1876SDR1806-101KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 28104C is based on the following critical parameters:

• Inductance Value: 100 µH (exact match required)
• Current Rating: Minimum 1.7 A (28104C rated at 1.8 A)
• DC Resistance: Maximum 190mOhm (28104C at 174mOhm)
• Shielding Configuration: Unshielded
• Mounting: Surface Mount
• Temperature Range: -40°C ~ 125°C
• Self Resonant Frequency: Approximately 7 MHz or higher

The Bourns Inc. SDR1806-101KL meets these substitution criteria with compatible electrical characteristics and physical form factor suitable for the 28104C application space.

Parameter Comparison

Engineering Selection Recommendations

The SDR1806-101KL from Bourns Inc. is an active product with ROHS3 compliance, providing regulatory advantage over the obsolete 28104C. Both components share identical inductance values, matching temperature ranges, and unshielded configurations. The SDR1806-101KL operates at 1.7 A versus the 28104C's 1.8 A rating; applications requiring the full 1.8 A must account for this 0.1 A reduction. DC resistance tolerance is within acceptable engineering margins (190mOhm versus 174mOhm). Self-resonant frequency and Q-factor performance are comparable across both parts. The active product status and compliance certifications of the SDR1806-101KL support long-term supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the SDR1806-101KL directly replace the 28104C in all applications?

A: Direct replacement is suitable for applications where current demand does not exceed 1.7 A. The 28104C is rated for 1.8 A; designs operating near this maximum must be re-evaluated with the SDR1806-101KL's 1.7 A rating.

Q: What are the physical dimension differences between these parts?

A: The 28104C measures 0.728" L x 0.598" W x 0.299" H (18.50mm x 15.20mm x 7.60mm). The SDR1806-101KL measures 0.720" L x 0.551" W x 0.272" H (18.30mm x 14.00mm x 6.90mm). Both are nonstandard packages; PCB layout verification is required.

Q: Are there compliance or regulatory differences?

A: The SDR1806-101KL carries ROHS3 compliance certification, while the 28104C status is not specified. Both are REACH Unaffected and classified under ECCN EAR99 and HTSUS 8504.50.4000.

Q: How do the DC resistance values compare?

A: The 28104C specifies 174mOhm maximum; the SDR1806-101KL specifies 190mOhm maximum. This 16mOhm difference represents approximately 9% higher resistance and should be evaluated in power dissipation calculations for the target application.

Q: What is the difference between the core materials?

A: The 28104C is a standard wirewound inductor. The SDR1806-101KL uses a drum core ferrite wirewound construction, which contributes to its higher Q-factor (25 @ 796kHz versus 21.4 @ 800kHz).