1210HS-123EMFS Equivalent & Substitute Parts

Part Overview

The 1210HS-123EMFS is a 12 µH unshielded drum core wirewound inductor manufactured by Delta Electronics/Components, rated for 180 mA continuous current with 2Ohm DC resistance in a 1210 (3225 Metric) surface mount package. This component is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure supply chain availability for new production and repair applications.

Substiute Parts

1210HS-123EMFS

Delta Electronics/ComponentsIn Stock: 9831210HS-123EMFS Datasheet

Current PartRFQ

744032120

Würth ElektronikIn Stock: 3498744032120 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1210HS-123EMFS is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 12 µH (exact match required)
• Package / Case: 1210 (3225 Metric) (physical and electrical compatibility)
• Core type: Ferrite drum core, unshielded (functional equivalence)
• Mounting type: Surface mount (assembly compatibility)

Secondary Compatibility Criteria:

• Current rating: Substitute must equal or exceed 180 mA
• DC resistance: Substitute must be equal to or lower than 2Ohm to maintain circuit performance
• Operating temperature range: Substitute must cover or exceed -40°C ~ 85°C
• RoHS3 compliance: Required for regulatory alignment

The Würth Elektronik 744032120 satisfies all primary matching criteria and exceeds secondary compatibility requirements, qualifying it as a direct functional substitute.

Parameter Comparison

Engineering Selection Recommendations

The Würth Elektronik 744032120 is the qualified substitute for the obsolete 1210HS-123EMFS based on the following engineering factors:

Functional Equivalence: Both components share identical inductance values (12 µH), package dimensions (1210 / 3225 Metric), core construction (ferrite drum core, unshielded), and mounting methodology (surface mount). Physical and electrical compatibility is established.

Performance Enhancement: The 744032120 provides superior electrical characteristics within the same physical envelope: current rating increased from 180 mA to 290 mA, DC resistance reduced from 2Ohm to 700mOhm maximum, and inductance tolerance tightened from ±20% to ±10%. These improvements enhance circuit reliability and reduce power dissipation.

Compliance and Availability: The 744032120 maintains ROHS3 compliance and MSL 1 rating, ensuring regulatory alignment. Active product status guarantees supply chain continuity and long-term availability, eliminating obsolescence risk associated with the original component.

Temperature Performance: The extended operating temperature range (-40°C ~ 125°C versus -40°C ~ 85°C) provides additional thermal margin for demanding applications.

Frequently Asked Questions (FAQ)

Q: Can the 744032120 directly replace the 1210HS-123EMFS in existing designs?

A: Yes. Both components share identical inductance (12 µH), package footprint (1210 / 3225 Metric), core type (ferrite drum core, unshielded), and surface mount configuration. No PCB layout modifications are required.

Q: What are the key differences between these two inductors?

A: The primary differences are: (1) current rating increased from 180 mA to 290 mA, (2) DC resistance reduced from 2Ohm to 700mOhm maximum, (3) inductance tolerance improved from ±20% to ±10%, and (4) operating temperature range extended from -40°C ~ 85°C to -40°C ~ 125°C. All differences favor the substitute part.

Q: Will the lower DC resistance of the 744032120 affect circuit operation?

A: No. Lower DC resistance (700mOhm versus 2Ohm) reduces power dissipation and heat generation, improving overall circuit efficiency. This change is beneficial and does not introduce compatibility issues.

Q: Are both components RoHS compliant?

A: Yes. Both the 1210HS-123EMFS and 744032120 are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level), meeting current regulatory requirements.

Q: What is the physical size difference between these components?

A: Both components use the 1210 (3225 Metric) package. The 744032120 has slightly smaller dimensions (3.20mm L x 2.50mm W x 2.30mm H seated height) compared to the 1210HS-123EMFS (3.50mm L x 2.80mm W x 2.40mm H seated height). These minor variations remain within standard 1210 package tolerances and do not affect PCB compatibility.

Q: Is the 744032120 available in the same packaging format?

A: The 744032120 is supplied in Tape & Reel (TR) format, which is standard for high-volume production. The 1210HS-123EMFS packaging format was not specified in the original documentation. Both formats are compatible with automated assembly equipment.