1008HC-182EKFS Equivalent & Substitute Parts Reference

Part Overview

The 1008HC-182EKFS is a 1.8 µH unshielded drum core wirewound inductor manufactured by Delta Electronics/Components, rated for 550 mA with 550mOhm DC resistance in a 1008 (2520 Metric) surface mount package. This part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility across critical electrical and mechanical parameters.

Substiute Parts

1008HC-182EKFS

Delta Electronics/ComponentsIn Stock: 10431008HC-182EKFS Datasheet

Current PartRFQ

744758318A

Würth ElektronikIn Stock: 2327744758318A Datasheet

DirectRFQ

NLV25T-1R8J-EF

TDK CorporationIn Stock: 2266NLV25T-1R8J-EF Datasheet

SimilarRFQ

NLV25T-1R8J-EFD

TDK CorporationIn Stock: 1228NLV25T-1R8J-EFD Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1008HC-182EKFS is determined by the following mandatory parameters:

Core Compatibility Parameters:

• Inductance value: 1.8 µH (exact match required)
• Package / Case: 1008 (2520 Metric) (exact match required)
• Core material: Ferrite, unshielded drum core (exact match required)
• Mounting type: Surface mount (exact match required)

Electrical Performance Parameters:

• Current rating must equal or exceed 550 mA
• DC resistance must not exceed 550mOhm
• Operating temperature range must encompass -40°C ~ 85°C minimum
• Inductance tolerance must be ±10% or tighter

Compliance Parameters:

• RoHS3 compliance required
• Moisture Sensitivity Level 1 required

The substitute parts listed below satisfy all mandatory core compatibility parameters. Electrical performance variations are documented in the Parameter Comparison table.

Parameter Comparison

Engineering Selection Recommendations

744758318A (Würth Elektronik WE-RFH Series)

This part is a direct substitute for applications requiring current ratings at or above 550 mA. The 744758318A provides 630 mA current rating with improved inductance tolerance (±5% versus ±10%). DC resistance specification of 750mOhm maximum exceeds the original 550mOhm specification by 200mOhm. The part maintains identical operating temperature range (-40°C ~ 85°C), package dimensions, and RoHS3 compliance. Active product status ensures long-term availability. Selection of this part is appropriate for designs where the higher current capacity and tighter tolerance provide performance margin.

NLV25T-1R8J-EF and NLV25T-1R8J-EFD (TDK NLV Series)

Both TDK parts are functionally equivalent in inductance, package, and core type. These parts are suitable only for applications where the circuit current requirement does not exceed 210 mA. The 210 mA current rating is substantially lower than the original 550 mA specification. DC resistance of 1.45Ohm maximum significantly exceeds the original 550mOhm specification. Operating temperature range extends to 105°C, providing additional thermal margin. Both parts maintain RoHS3 compliance and MSL 1 rating.

The NLV25T-1R8J-EFD variant includes AEC-Q200 automotive qualification rating, distinguishing it from the NLV25T-1R8J-EF variant. Selection between these two TDK parts depends on automotive application requirements.

Selection Criteria Summary

• For applications requiring 550 mA or higher current capacity: select 744758318A
• For applications with current requirements not exceeding 210 mA: select NLV25T-1R8J-EF or NLV25T-1R8J-EFD
• For automotive applications with current requirements not exceeding 210 mA: select NLV25T-1R8J-EFD

Frequently Asked Questions (FAQ)

Q: Can the NLV25T-1R8J-EF or NLV25T-1R8J-EFD be used as direct replacements for the 1008HC-182EKFS in all applications?

A: No. These TDK parts have a maximum current rating of 210 mA, compared to the original part's 550 mA rating. They are suitable only for circuits where the actual operating current does not exceed 210 mA. Using these parts in circuits designed for 550 mA operation will result in inductor saturation and performance degradation.

Q: What is the significance of the DC resistance difference between the 1008HC-182EKFS (550mOhm) and the 744758318A (750mOhm maximum)?

A: DC resistance contributes to circuit losses and heat generation. The 744758318A's higher DCR will produce approximately 36% more resistive loss at rated current. This difference must be evaluated against circuit power budget and thermal management capabilities. For low-power applications, this difference may be negligible.

Q: Are all substitute parts available in the same packaging format?

A: Yes. All substitute parts are supplied in 1008 (2520 Metric) surface mount packages with identical mounting type. Physical dimensions vary slightly between manufacturers, but all parts fit within the 1008 package specification and are compatible with standard surface mount assembly processes.

Q: What is the difference between NLV25T-1R8J-EF and NLV25T-1R8J-EFD?

A: Both parts are electrically and mechanically identical. The NLV25T-1R8J-EFD includes AEC-Q200 automotive qualification rating. Selection depends on whether the application requires automotive-grade component certification.

Q: Why does the 744758318A have a higher self-resonant frequency (200MHz) compared to the original part (135MHz)?

A: Self-resonant frequency is determined by inductor construction and parasitic capacitance. The 744758318A's higher SRF indicates different winding geometry or core configuration. This parameter is relevant only for high-frequency applications operating near or above the SRF value.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification, matching the original part's environmental compliance status.