1210HS-183EMFS Equivalent & Substitute Parts Reference

Part Overview

The 1210HS-183EMFS is a fixed inductance surface mount component manufactured by Delta Electronics/Components. This 18 µH unshielded drum core wirewound inductor is rated for 165 mA continuous current with 2.5 Ohm DC resistance and operates across the -40°C to 85°C temperature range. The component is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility within target circuit applications.

Substiute Parts

1210HS-183EMFS

Delta Electronics/ComponentsIn Stock: 9681210HS-183EMFS Datasheet

Current PartRFQ

744032180

Würth ElektronikIn Stock: 4161744032180 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1210HS-183EMFS is determined by the following mandatory criteria:

Inductance Value: The substitute must provide exactly 18 µH inductance to maintain circuit frequency response and filtering characteristics.

Package Compatibility: The substitute must use the 1210 (3225 Metric) surface mount package to ensure PCB footprint and assembly process compatibility without design modification.

Current Rating: The substitute must support a minimum continuous current rating of 165 mA. Substitutes with higher current ratings provide additional design margin and thermal performance.

Shielding Configuration: The substitute must maintain unshielded drum core construction to preserve the original electromagnetic coupling and EMI profile.

DC Resistance: While the original part specifies 2.5 Ohm DCR, substitutes with lower DCR values reduce power dissipation and improve efficiency. Substitutes with higher DCR values require thermal and power budget re-evaluation.

Regulatory Compliance: The substitute must maintain ROHS3 compliance and REACH unaffected status for supply chain and regulatory continuity.

Product Status: Active status substitutes ensure long-term availability and supply chain stability compared to the obsolete original part.

Parameter Comparison

Engineering Selection Recommendations

The Würth Elektronik 744032180 qualifies as a direct functional substitute for the obsolete Delta Electronics 1210HS-183EMFS based on the following engineering criteria:

Electrical Compatibility: Both components provide identical 18 µH inductance in the 1210 surface mount package. The substitute's 240 mA current rating exceeds the original 165 mA requirement, providing 45% additional current capacity margin. The substitute's 1.1 Ohm maximum DCR is significantly lower than the original 2.5 Ohm specification, resulting in reduced power dissipation and improved thermal performance in the application circuit.

Physical Compatibility: The 1210 (3225 Metric) package designation is identical. The substitute's slightly reduced physical dimensions (3.20mm x 2.50mm versus 3.50mm x 2.80mm) and lower seated height (2.30mm versus 2.40mm) ensure PCB footprint compatibility without design modification. The component will function within existing PCB layouts and assembly processes.

Regulatory and Compliance Alignment: Both components maintain ROHS3 compliance, REACH unaffected status, and MSL 1 (unlimited) moisture sensitivity rating. This ensures supply chain continuity and regulatory requirement satisfaction.

Product Status Advantage: The substitute's active product status guarantees long-term availability and supply chain stability, eliminating the obsolescence risk associated with the original Delta Electronics component.

Temperature Operating Range: The substitute supports -40°C to 125°C operation, extending the upper temperature limit by 40°C compared to the original -40°C to 85°C range. This provides additional thermal margin for applications operating at elevated ambient or component temperatures.

Tolerance Improvement: The substitute's ±10% inductance tolerance is tighter than the original ±20% specification, providing improved circuit performance consistency across production batches.

Frequently Asked Questions (FAQ)

Q: Can the Würth Elektronik 744032180 be used as a direct replacement without PCB modification?

A: Yes. Both components use the 1210 (3225 Metric) surface mount package with compatible footprints. The substitute's slightly smaller physical dimensions ensure compatibility with existing PCB layouts. No design modification is required.

Q: What is the significance of the lower DC resistance in the substitute part?

A: The substitute's 1.1 Ohm maximum DCR compared to the original 2.5 Ohm specification reduces resistive power dissipation by approximately 56%. This results in lower component temperature rise and improved circuit efficiency. For applications with tight thermal budgets, this represents a performance improvement.

Q: Does the substitute's higher current rating affect circuit operation?

A: No. The substitute's 240 mA current rating exceeds the original 165 mA requirement. This provides additional design margin and thermal headroom without affecting circuit function. The component will operate safely at or below the original 165 mA design current.

Q: Are there any frequency response differences between the original and substitute?

A: The components have different self-resonant frequencies (27 MHz original versus 15 MHz substitute) and Q factors measured at different test frequencies. For applications operating below 10 MHz, these differences are not significant. For high-frequency applications above 15 MHz, verify the substitute's frequency response characteristics against circuit requirements.

Q: What is the advantage of the substitute's extended temperature range?

A: The substitute operates to 125°C versus the original 85°C upper limit. This provides 40°C additional thermal margin for applications in elevated temperature environments or with high component power dissipation. The extended range improves reliability in thermally demanding applications.

Q: Are both components RoHS and REACH compliant?

A: Yes. Both the original Delta Electronics 1210HS-183EMFS and the Würth Elektronik 744032180 are ROHS3 compliant and REACH unaffected. Regulatory compliance is maintained with the substitution.

Q: What is the practical impact of the tighter inductance tolerance in the substitute?

A: The substitute's ±10% tolerance versus the original ±20% tolerance reduces inductance variation across production batches. This improves circuit performance consistency, particularly in applications where inductance value directly affects frequency response, filtering characteristics, or impedance matching.

Q: Is the substitute available in the same packaging format?

A: The original part is specified as loose component packaging. The substitute is supplied in Tape & Reel (TR) format, which is standard for high-volume surface mount assembly. This packaging format is compatible with automated pick-and-place assembly equipment and provides improved handling and storage characteristics.