1210HS-181EMFS Equivalent & Substitute Parts Reference

Part Overview

The 1210HS-181EMFS is a 180 nH unshielded drum core wirewound inductor manufactured by Delta Electronics/Components, rated for 650 mA with 100mOhm DC resistance in a 1210 (3225 Metric) surface mount package. This part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility within specified electrical and mechanical parameters.

Substiute Parts

1210HS-181EMFS

Delta Electronics/ComponentsIn Stock: 10191210HS-181EMFS Datasheet

Current PartRFQ

NLV32T-R18J-EF

TDK CorporationIn Stock: 2907NLV32T-R18J-EF Datasheet

SimilarRFQ

NLV32T-R18J-EFD

TDK CorporationIn Stock: 2549NLV32T-R18J-EFD Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1210HS-181EMFS is determined by the following critical parameters:

Mandatory Matching Parameters:

• Inductance value: 180 nH
• Package / Case: 1210 (3225 Metric)
• Core type: Ferrite drum core, unshielded
• Mounting type: Surface mount
• Inductance test frequency: 25.2 MHz

Allowable Parameter Variations:

• Current rating may be lower than the original part (650 mA) provided the substitute meets the application's actual current requirements
• DC resistance may exceed the original specification (100mOhm) within acceptable circuit performance limits
• Inductance tolerance may be tighter (±5% vs ±20%)
• Operating temperature range may be extended (up to 105°C vs 85°C)
• Product status transition from obsolete to active

The identified substitutes NLV32T-R18J-EF and NLV32T-R18J-EFD from TDK Corporation satisfy all mandatory matching parameters while maintaining functional equivalence for applications where the reduced current rating (450 mA) and increased DCR (280mOhm Max) are acceptable.

Parameter Comparison

Engineering Selection Recommendations

NLV32T-R18J-EF Selection Criteria: The NLV32T-R18J-EF is an active product from TDK Corporation suitable for applications where the 450 mA current rating satisfies circuit requirements. This substitute provides tighter inductance tolerance (±5%), extended operating temperature range to 105°C, and maintains ROHS3 compliance. The increased DCR of 280mOhm Max versus the original 100mOhm must be evaluated for power dissipation and circuit performance impact.

NLV32T-R18J-EFD Selection Criteria: The NLV32T-R18J-EFD is functionally equivalent to NLV32T-R18J-EF with the addition of AEC-Q200 automotive qualification rating. This variant is recommended for applications requiring automotive-grade reliability and traceability. Both TDK substitutes are supplied in Tape & Reel packaging and maintain identical electrical and mechanical specifications except for the AEC-Q200 designation on the EFD variant.

Substitution Feasibility: Direct substitution is feasible when circuit design accommodates the reduced current rating (450 mA vs 650 mA) and increased DCR (280mOhm Max vs 100mOhm). Physical dimensions are slightly smaller for TDK parts (3.20mm x 2.50mm vs 3.50mm x 2.80mm), which may require PCB layout verification. Both substitutes maintain identical package height (2.40mm) and mounting compatibility.

Frequently Asked Questions (FAQ)

Q: Can NLV32T-R18J-EF or NLV32T-R18J-EFD be used as direct drop-in replacements for 1210HS-181EMFS?

A: Direct substitution is possible when the application's actual current requirement does not exceed 450 mA and the increased DCR of 280mOhm Max is acceptable for circuit performance. The identical 1210 package and mounting type ensure mechanical compatibility. PCB layout verification is recommended due to slightly smaller physical dimensions of the TDK parts.

Q: What is the difference between NLV32T-R18J-EF and NLV32T-R18J-EFD?

A: Both parts are electrically and mechanically identical with matching inductance, current rating, DCR, and operating temperature specifications. The primary distinction is that NLV32T-R18J-EFD carries AEC-Q200 automotive qualification rating, making it suitable for automotive applications requiring this certification. NLV32T-R18J-EF is the standard industrial variant without automotive qualification.

Q: Why is the current rating lower on the TDK substitutes (450 mA vs 650 mA)?

A: The TDK NLV-EF and NLV-EFD series are designed with different core and winding specifications that result in a 450 mA current rating. Substitution is valid only when the application's actual operating current does not exceed this rating. Circuit analysis must confirm that 450 mA is sufficient for the intended use.

Q: How does the increased DCR (280mOhm Max vs 100mOhm) affect circuit performance?

A: The increased DCR results in higher power dissipation in the inductor. For a given current, power loss increases proportionally to DCR. Circuit designers must calculate the thermal impact and verify that the inductor's temperature rise remains within acceptable limits for the application. The extended operating temperature range of the TDK parts (-40°C to 105°C) provides additional thermal margin.

Q: Are the TDK substitutes RoHS and REACH compliant?

A: Both NLV32T-R18J-EF and NLV32T-R18J-EFD are ROHS3 compliant. REACH status differs: the original 1210HS-181EMFS is REACH Unaffected, while both TDK substitutes are REACH Affected. Applications subject to REACH regulations must confirm compliance requirements with the TDK parts.

Q: What is the significance of the tighter inductance tolerance (±5% vs ±20%)?

A: The TDK substitutes provide ±5% inductance tolerance compared to ±20% for the original part. This tighter tolerance ensures more consistent inductance values across production batches, which may improve circuit performance stability and reduce design margin requirements in applications sensitive to inductance variation.

Q: Can the NLV32T-R18J-EFD be used in non-automotive applications?

A: Yes. The NLV32T-R18J-EFD is a superset of the NLV32T-R18J-EF with additional AEC-Q200 qualification. It can be used in any application where the standard EF variant is suitable. The AEC-Q200 rating does not restrict use to automotive applications; it simply certifies automotive-grade reliability.