1008HC-103EKFS Equivalent & Substitute Parts Reference

Part Overview

The 1008HC-103EKFS is a 10 µH unshielded drum core wirewound inductor manufactured by Delta Electronics/Components, rated for 300 mA with 1.5Ohm DC resistance in a 1008 (2520 Metric) surface mount package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design support and procurement continuity. The part operates across -40°C to 85°C and complies with ROHS3 and REACH requirements.

Substiute Parts

1008HC-103EKFS

Delta Electronics/ComponentsIn Stock: 9581008HC-103EKFS Datasheet

Current PartRFQ

AISC-1008F-100G-T

Abracon LLCIn Stock: 2733AISC-1008F-100G-T Datasheet

DirectRFQ

NLCV25T-100K-EFR

TDK CorporationIn Stock: 4559NLCV25T-100K-EFR Datasheet

DirectRFQ

NLCV25T-100K-EFRD

TDK CorporationIn Stock: 4969NLCV25T-100K-EFRD Datasheet

DirectRFQ

NLCV25T-100K-EF

TDK CorporationIn Stock: 2493NLCV25T-100K-EF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1008HC-103EKFS is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 10 µH (exact match required)
• Package/Case: 1008 (2520 Metric) surface mount (exact match required)
• Core material: Ferrite drum core, unshielded (exact match required)
• Mounting type: Surface mount (exact match required)

Secondary Compatibility Parameters:

• Current rating: Minimum 300 mA (equal or higher acceptable)
• DC resistance: Tolerance band compatibility within application requirements
• Operating temperature range: Minimum -40°C to 85°C (equal or extended range acceptable)
• Compliance: ROHS3 and REACH status (must match or exceed)

Substitute Classification:

Direct Substitutes (meet all primary and secondary criteria):

• NLCV25T-100K-EFR (TDK Corporation)
• NLCV25T-100K-EFRD (TDK Corporation)

Compatible Substitute (meets primary criteria; DCR and current rating differ):

• AISC-1008F-100G-T (Abracon LLC)

Similar Part (meets primary criteria; current rating below specification):

• NLCV25T-100K-EF (TDK Corporation)

Parameter Comparison

Engineering Selection Recommendations

For Direct Substitution (Preferred):

NLCV25T-100K-EFR and NLCV25T-100K-EFRD are the primary substitutes for the 1008HC-103EKFS. Both are manufactured by TDK Corporation with active product status. These parts maintain the 10 µH inductance, 1008 package format, and ferrite drum core construction. Both support the required 300 mA current rating with enhanced capability at 360 mA. The DC resistance values (1.32Ohm Max) are lower than the original specification, providing improved efficiency characteristics. NLCV25T-100K-EFRD includes AEC-Q200 automotive qualification and extended operating temperature to 125°C, making it suitable for applications requiring enhanced reliability. NLCV25T-100K-EFR operates to 85°C, matching the original temperature range.

For Applications with Relaxed Current Requirements:

NLCV25T-100K-EF (TDK Corporation) is suitable only for applications where the current requirement does not exceed 210 mA. This part shares the same inductance, package, and core type but has a reduced current rating. Selection of this part requires verification that circuit current demands remain below 210 mA.

For Cost-Optimized Selection:

AISC-1008F-100G-T (Abracon LLC) provides an active alternative with tighter tolerance (±2% versus ±10%) and maintains 300 mA current rating. However, the DC resistance is elevated to 2.95Ohm Max, which may impact circuit performance in applications sensitive to inductor losses. This part is suitable for designs where inductance tolerance precision is critical and DCR elevation is acceptable.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity. NLCV25T-100K-EFRD includes AEC-Q200 qualification for automotive applications.

Frequently Asked Questions (FAQ)

Q: Can NLCV25T-100K-EF replace the 1008HC-103EKFS directly?

A: NLCV25T-100K-EF is not recommended as a direct replacement. While it matches the inductance value and package format, its current rating of 210 mA is below the original 300 mA specification. Use this part only if circuit analysis confirms maximum current will not exceed 210 mA.

Q: What is the difference between NLCV25T-100K-EFR and NLCV25T-100K-EFRD?

A: Both parts are electrically identical with 10 µH inductance, 360 mA current rating, and 1.32Ohm Max DCR. The primary differences are packaging format (Tape & Reel versus Cut Tape) and operating temperature range. NLCV25T-100K-EFRD extends to 125°C and includes AEC-Q200 automotive qualification. Select based on packaging requirements and temperature specifications of the target application.

Q: Why does AISC-1008F-100G-T have higher DC resistance?

A: DC resistance variation results from different winding designs and core material processing between manufacturers. The 2.95Ohm Max value in AISC-1008F-100G-T is higher than the original 1.5Ohm specification. Evaluate circuit impact through thermal analysis and efficiency calculations before selection.

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

A: No. NLCV25T-100K-EFR and AISC-1008F-100G-T are supplied in Tape & Reel format. NLCV25T-100K-EFRD is available in Cut Tape format. Verify packaging compatibility with assembly equipment and procurement processes.

Q: What is the tolerance difference between the main part and AISC-1008F-100G-T?

A: The original 1008HC-103EKFS has ±10% inductance tolerance. AISC-1008F-100G-T offers ±2% tolerance, providing tighter inductance control. This enhanced precision may benefit applications requiring strict inductance specifications but does not affect substitution eligibility.

Q: Can I use NLCV25T-100K-EFRD in non-automotive applications?

A: Yes. AEC-Q200 qualification indicates automotive-grade reliability but does not restrict use in other applications. NLCV25T-100K-EFRD is suitable for any application requiring the specified electrical and thermal characteristics.

Q: How do I verify substitute part compatibility in my circuit?

A: Confirm that the substitute part meets or exceeds the following requirements: inductance value 10 µH, current rating ≥ 300 mA, operating temperature range includes your application limits, and DC resistance is acceptable for your circuit losses. Verify mechanical fit within the 1008 package footprint.