1008HC-103EJFS Equivalent & Substitute Parts Reference

Part Overview

The 1008HC-103EJFS is a 10 µH unshielded drum core wirewound inductor manufactured by Delta Electronics/Components, rated for 300 mA continuous current with 1.5 Ohm DC resistance. This surface mount component is packaged in the 1008 (2520 Metric) form factor and operates across the -40°C to 85°C temperature range. The part is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design support and procurement.

Key Parameters

Parameter	Value	Unit
Inductance	10	µH
Current Rating	300	mA
DC Resistance (DCR)	1.5	Ohm
Tolerance	±5%
Core Type	Ferrite Drum Core
Shielding	Unshielded
Package / Case	1008 (2520 Metric)
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

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

Primary Matching Criteria:

Inductance value: 10 µH (exact match required)
Package / Case: 1008 (2520 Metric) (exact match required)
Core type: Ferrite drum core, unshielded (exact match required)
Mounting type: Surface mount (exact match required)
Current rating: 300 mA minimum (equal or greater acceptable)
Operating temperature range: -40°C minimum, 85°C maximum (equal or greater range acceptable)

Direct Substitutes (744758410A, AISC-1008F-100G-T) meet all primary criteria with active product status. These components maintain the 10 µH inductance, 300 mA current rating, 1008 package, and ferrite drum core construction. Variations in DC resistance (2.8 Ohm and 2.95 Ohm respectively, versus 1.5 Ohm) and tolerance specifications (±2% for AISC-1008F-100G-T versus ±5%) represent acceptable engineering trade-offs within the same functional category.

Similar Substitutes (744762410A, NLV25T-100J-EF, NLV25T-100J-EFD) share the 10 µH inductance and 1008 package but differ in current rating (150 mA to 155 mA versus 300 mA) and DC resistance (3.5 Ohm). These components are suitable only for applications where the reduced current rating is acceptable.

Parameter Comparison

Parameter	1008HC-103EJFS (Main)	744758410A	AISC-1008F-100G-T	744762410A	NLV25T-100J-EF	NLV25T-100J-EFD
Manufacturer	Delta Electronics	Würth Elektronik	Abracon LLC	Würth Elektronik	TDK Corporation	TDK Corporation
Inductance (µH)	10	10	10	10	10	10
Current Rating (mA)	300	300	300	150	155	155
DC Resistance (Ohm)	1.5	2.8 Max	2.95 Max	3.5 Max	3.5 Max	3.5 Max
Tolerance	±5%	±5%	±2%	±5%	±5%	±5%
Package / Case	1008 (2520 Metric)	1008 (2520 Metric)	1008 (2520 Metric)	1008 (2520 Metric)	1008 (2520 Metric)	1008 (2520 Metric)
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 105°C
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Substitution (Full Current Rating Compatibility):

The 744758410A (Würth Elektronik WE-RFH series) and AISC-1008F-100G-T (Abracon LLC AISC-1008F series) are the primary active alternatives. Both maintain the 300 mA current rating and 10 µH inductance specification. The AISC-1008F-100G-T offers tighter tolerance (±2% versus ±5%) and is available in higher volume (2628 Pcs in stock). The 744758410A provides a smaller physical footprint (0.102" L x 0.083" W versus 0.115" L x 0.110" W) and lower maximum DC resistance (2.8 Ohm versus 2.95 Ohm). Both components are ROHS3 compliant with MSL 1 rating.

For Reduced Current Applications:

The 744762410A (Würth Elektronik WE-RFI series), NLV25T-100J-EF (TDK Corporation NLV-EF series), and NLV25T-100J-EFD (TDK Corporation NLV-EFD series) are suitable only where application current requirements do not exceed 155 mA. The NLV25T-100J-EFD offers the highest inventory availability (11260 Pcs) and includes AEC-Q200 automotive qualification. The extended operating temperature range (-40°C to 105°C) of TDK components provides additional thermal margin compared to the original specification.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and MSL 1 rating. The NLV25T-100J-EF and NLV25T-100J-EFD are REACH Affected, whereas the main part and other substitutes are REACH Unaffected. Selection should account for supply chain compliance requirements specific to the application region.

Frequently Asked Questions (FAQ)

Q: Can 744758410A or AISC-1008F-100G-T be used as direct replacements for 1008HC-103EJFS?

A: Yes. Both components maintain the 10 µH inductance, 300 mA current rating, 1008 package form factor, and ferrite drum core construction. The primary difference is increased DC resistance (2.8 Ohm and 2.95 Ohm respectively versus 1.5 Ohm). Circuit designs must account for this resistance increase in power dissipation and impedance calculations.

Q: What is the impact of higher DC resistance in the substitute parts?

A: Increased DC resistance results in higher power dissipation at rated current. At 300 mA, the 1008HC-103EJFS dissipates 0.135 W (1.5 Ohm × 0.3 A²), while 744758410A dissipates 0.252 W and AISC-1008F-100G-T dissipates 0.266 W. Thermal design and PCB layout must accommodate this additional heat generation.

Q: Are the 744762410A, NLV25T-100J-EF, and NLV25T-100J-EFD suitable for 300 mA applications?

A: No. These components are rated for 150 mA to 155 mA maximum current. Use only in applications where circuit current does not exceed the component's rated current limit. Exceeding this rating will cause saturation and inductor failure.

Q: What packaging differences exist between substitute options?

A: 744758410A and AISC-1008F-100G-T are supplied in Tape & Reel (TR) format. NLV25T-100J-EF is available in Cut Tape (CT) & Digi-Reel® format, while NLV25T-100J-EFD is supplied in Tape & Reel (TR). Packaging selection depends on assembly equipment compatibility and procurement volume requirements.

Q: Does the ±2% tolerance of AISC-1008F-100G-T provide advantages over ±5% tolerance parts?

A: Tighter tolerance (±2%) reduces inductance variation across production batches, beneficial for applications requiring precise impedance matching or frequency-dependent filtering. The ±5% tolerance of other substitutes is acceptable for general-purpose filtering and energy storage applications where inductance variation within this range does not affect circuit performance.

Q: Are the TDK NLV25T series parts suitable for automotive applications?

A: The NLV25T-100J-EFD includes AEC-Q200 automotive qualification. The NLV25T-100J-EF does not carry this certification. Selection depends on whether the application requires automotive-grade component qualification.

Q: What is the significance of the extended temperature range in TDK components?

A: TDK NLV25T series components operate to 105°C versus 85°C for the original part and Würth/Abracon substitutes. This extended range provides thermal margin in applications approaching the upper temperature limit, reducing risk of inductor saturation or performance degradation at elevated ambient or self-heating conditions.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message