1008HC-272EKFS Surface Mount Wirewound Inductor Equivalent & Substitute Parts

Part Overview

The 1008HC-272EKFS is a 2.7 µH unshielded drum core wirewound inductor manufactured by Delta Electronics/Components, designed for surface mount applications in the 1008 (2520 Metric) package. This component is rated for 500 mA continuous current with 700 mOhm DC resistance and operates across the -40°C to 85°C temperature range.

The 1008HC-272EKFS is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this inductor specification.

Key Parameters

Parameter	Value	Unit
Inductance	2.7	µH
Inductance Tolerance	±10%	-
Current Rating	500	mA
DC Resistance (DCR)	700	mOhm
Core Type	Ferrite Drum Core	-
Shielding	Unshielded	-
Package	1008 (2520 Metric)	-
Mounting Type	Surface Mount	-
Operating Temperature	-40°C to 85°C	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution eligibility for the 1008HC-272EKFS is determined by the following critical parameters:

Primary Matching Criteria:

Inductance value: 2.7 µH (tolerance variations acceptable within application limits)
Package: 1008 (2520 Metric) surface mount
Core type: Ferrite drum core, unshielded
Mounting: Surface mount technology

Secondary Compatibility Factors:

Current rating: Must meet or exceed 500 mA requirement
DC resistance: Lower values preferred; higher values acceptable if application permits
Operating temperature range: Must cover -40°C to 85°C minimum
Regulatory compliance: ROHS3 compliance required

The substitute parts are grouped into two categories based on current rating capability:

Direct Substitutes (Current Rating ≥ 500 mA):

744758327A (Würth Elektronik WE-RFH series): 520 mA rating
AISC-1008F-2R7J-T (Abracon LLC AISC-1008F series): 490 mA rating

Similar Parts (Current Rating < 500 mA):

NLV25T-2R7J-EF (TDK Corporation NLV-EF series): 195 mA rating
NLV25T-2R7J-EFD (TDK Corporation NLV-EFD series): 195 mA rating

Parameter Comparison

Parameter	1008HC-272EKFS (Main)	744758327A	AISC-1008F-2R7J-T	NLV25T-2R7J-EF	NLV25T-2R7J-EFD
Manufacturer	Delta Electronics	Würth Elektronik	Abracon LLC	TDK Corporation	TDK Corporation
Inductance	2.7 µH	2.7 µH	2.7 µH	2.7 µH	2.7 µH
Inductance Tolerance	±10%	±5%	±5%	±5%	±5%
Current Rating	500 mA	520 mA	490 mA	195 mA	195 mA
DC Resistance	700 mOhm	1.1 Ohm Max	1.3 Ohm Max	1.7 Ohm Max	1.7 Ohm Max
Core Type	Ferrite Drum Core	Ferrite Drum Core	Ferrite Drum Core	Ferrite Drum Core	Ferrite Drum Core
Shielding	Unshielded	Unshielded	Unshielded	Unshielded	Unshielded
Package	1008 (2520 Metric)	1008 (2520 Metric)	1008 (2520 Metric)	1008 (2520 Metric)	1008 (2520 Metric)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 105°C	-40°C to 105°C
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Affected	REACH Affected

Engineering Selection Recommendations

For Direct Substitution (Current Rating ≥ 500 mA):

The 744758327A (Würth Elektronik WE-RFH series) is the primary recommended substitute. This part maintains the 2.7 µH inductance specification, exceeds the 500 mA current requirement with a 520 mA rating, and is classified as active product status. The part is ROHS3 compliant and REACH unaffected. The increased DC resistance (1.1 Ohm Max versus 700 mOhm) must be evaluated within the application circuit to confirm acceptable power dissipation and thermal performance.

The AISC-1008F-2R7J-T (Abracon LLC AISC-1008F series) provides an alternative direct substitute with 490 mA current rating, approaching the original 500 mA specification. This part is active status, ROHS3 compliant, and offers a tighter inductance tolerance (±5%). The higher DC resistance (1.3 Ohm Max) requires circuit-level verification.

For Applications with Reduced Current Requirements:

The NLV25T-2R7J-EF and NLV25T-2R7J-EFD (TDK Corporation NLV series) are suitable only for applications where the circuit current does not exceed 195 mA. Both parts are active status and ROHS3 compliant. The NLV25T-2R7J-EFD variant includes AEC-Q200 automotive qualification. Both parts support extended operating temperature to 105°C. The significantly higher DC resistance (1.7 Ohm Max) and lower current rating restrict these parts to lower-power applications.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance. The TDK parts (NLV25T-2R7J-EF and NLV25T-2R7J-EFD) are REACH affected, while the Würth and Abracon parts are REACH unaffected. Application regulatory requirements must determine acceptability of REACH-affected components.

Frequently Asked Questions (FAQ)

Q: Can the 744758327A directly replace the 1008HC-272EKFS in all applications?

A: The 744758327A matches the 2.7 µH inductance, 1008 package, and exceeds the 500 mA current requirement. However, the DC resistance increases from 700 mOhm to 1.1 Ohm maximum. Applications sensitive to inductor losses or thermal performance must evaluate this resistance increase. Circuit simulation or bench testing is appropriate to confirm performance within application tolerances.

Q: Why do the TDK NLV parts have lower current ratings?

A: The NLV25T-2R7J-EF and NLV25T-2R7J-EFD are rated for 195 mA continuous current, significantly below the original 500 mA specification. These parts are suitable only for low-current applications. Exceeding the 195 mA rating risks inductor saturation and performance degradation.

Q: What is the difference between NLV25T-2R7J-EF and NLV25T-2R7J-EFD?

A: Both parts share identical electrical specifications (2.7 µH, 195 mA, 1.7 Ohm DCR). The primary difference is that the NLV25T-2R7J-EFD includes AEC-Q200 automotive qualification. Selection depends on application requirements for automotive-grade components.

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

A: All substitute parts are supplied in 1008 (2520 Metric) surface mount packages compatible with the original 1008HC-272EKFS. All are available in Tape & Reel (TR) packaging. Physical dimensions vary slightly; refer to the detailed specifications for exact footprint and height measurements if space constraints exist.

Q: What is the impact of inductance tolerance differences?

A: The original 1008HC-272EKFS specifies ±10% tolerance, while all substitute parts offer ±5% tolerance. The tighter tolerance of substitute parts provides improved consistency and may reduce circuit performance variation. This is a beneficial characteristic for applications requiring stable inductance values.

Q: Are there any temperature range limitations with substitute parts?

A: The original part operates -40°C to 85°C. The Würth and Abracon substitutes maintain this range. The TDK NLV parts extend to -40°C to 105°C, providing additional thermal margin. Applications operating above 85°C benefit from the extended TDK range, though current rating limitations must still be observed.

Q: What regulatory compliance should be verified before substitution?

A: All parts are ROHS3 compliant and suitable for RoHS-regulated applications. REACH status differs: Würth (744758327A) and Abracon (AISC-1008F-2R7J-T) are REACH unaffected, while TDK parts are REACH affected. Applications subject to REACH restrictions must select accordingly. Moisture sensitivity level is 1 (unlimited) for all parts, indicating no special storage requirements.

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